JP7139846B2 - sanitary washing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sanitary washing apparatus for washing the private parts of a human body with washing water.

2. Description of the Related Art Conventionally, in a sanitary washing device mounted on a toilet such as a Western-style seated toilet and washing the private parts of a human body with washing water discharged from a water discharge nozzle, an open tank is provided in the washing water supply route from a water supply source to the water discharge nozzle. There is a configuration with The open tank has a function of forming an air gap for preventing backflow in the cleaning water supply path (see, for example, Patent Document 1).

As described in Patent Document 1, some open tanks have an overflow portion for discharging surplus water in the tank to the outside. As the overflow section provided in the tank, for example, as disclosed in Japanese Unexamined Patent Application Publication No. 2002-200003, a configuration having a cylindrical drainage pipe section erected on the bottom surface of the tank is adopted.

Specifically, the drain pipe portion that constitutes the overflow portion opens upward in the tank and opens the lower side to the outside of the tank, thereby communicating the inside and the outside of the tank. In such a configuration, when the upper opening position of the drain pipe portion reaches the overflow water level and the water level in the tank exceeds the overflow water level, the wash water in the tank flows from the upper opening of the drain pipe portion and flows out of the tank. will be discharged. The flush water discharged by the overflow section is basically discharged into the bowl section of the toilet bowl.

JP 2014-190000 JP 2005-192995 A

In order to improve the performance of draining surplus water from the tank in the above-described configuration of the overflow portion, it is conceivable to increase the opening area of the upper opening of the drain pipe portion and the pipe diameter. Further, the overflow portion is provided with a drainage pipe for guiding flush water discharged by the overflow portion to the bowl portion of the toilet bowl. For such piping, in order to improve the drainage performance of the overflow portion, it is desirable that the opening area of the upper opening of the drain pipe portion and the pipe diameter be retained as the flow passage area of the pipe.

However, increasing the flow path area of the drainage pipe may hinder the downsizing of the device, depending on the arrangement position of the open tank in the sanitary washing device and the arrangement position of the overflow part in the open tank. Become. Specifically, for example, in a configuration in which an open tank is arranged at the rear end of the upper surface of the toilet bowl, the drainage pipe is extended from the overflow portion of the open tank to the vicinity of the front bowl portion. become.

For this reason, when trying to secure a considerable flow area in the drainage pipe, from the viewpoint of avoiding interference of the pipe with various devices and equipment installed in front of the open tank in the sanitary washing device, It becomes difficult to make the device compact. In other words, it is difficult to simultaneously improve the drainage performance of the overflow portion of the open tank and reduce the size of the apparatus.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sanitary washing apparatus capable of improving the performance of draining surplus water in an open tank and of making the apparatus compact.

A sanitary washing apparatus according to the present invention is a sanitary washing apparatus for washing the private parts of a human body, comprising a water discharge nozzle for discharging water for washing the private parts of the human body, and water supplied from a water supply source to the water discharge nozzle. an open-type tank provided in a water supply path for supplying water, the open-type tank including a tank body, an inflow port for allowing water to flow into the tank body, and a water discharge nozzle inside the tank body with respect to the water discharge nozzle. and an air gap is formed between the inflow port and the water surface in the tank body, for discharging surplus water in the tank body to the outside. It has a first discharge port and a second discharge port, and the second discharge port opens upward.

According to the sanitary washing device having such a configuration, it is possible to improve the drainage performance of the surplus water in the tank in the open tank, and to make the device compact.

Another aspect of the sanitary washing device according to the present invention is the sanitary washing device, wherein the first discharge port opens upward.

According to the sanitary washing device having such a configuration, it is possible to further improve the drainage performance of the surplus water in the tank in the open tank, and to further reduce the size of the device.

Another aspect of the sanitary washing device according to the present invention is the sanitary washing device, wherein the height of the opening position of the second discharge port is lower than the height of the opening position of the first discharge port.

According to the sanitary washing device having such a configuration, as the water level in the tank rises, the water is drained from the second discharge port as the first step, so that a large amount of water can be washed at once by a relatively small fluctuation of the water level. can be prevented from being discharged out of the tank as surplus water.

In another aspect of the sanitary washing device according to the present invention, in the sanitary washing device, the tank body includes a rectifying section provided between the inflow port and the first and second discharge ports. It has

According to the sanitary washing device having such a configuration, the water flowing into the tank main body from the inlet portion is rectified by the rectifying portion, so that the water level in the tank main body can be stabilized.

According to another aspect of the sanitary washing device according to the present invention, in the sanitary washing device, the second discharge port has a cylindrical portion erected on the bottom of the tank body.

According to the sanitary washing device having such a configuration, it is possible to easily secure drainage performance and to reduce the size of the open tank.

Advantageous Effects of Invention According to the present invention, it is possible to improve the drainage performance of excess water in an open tank, and to make the apparatus compact.

1 is a perspective view showing a toilet apparatus equipped with a sanitary washing device according to one embodiment of the present invention; FIG. FIG. 2 is a block diagram showing the flow channel configuration and control configuration of the sanitary washing device according to one embodiment of the present invention; FIG. 2 is a plan view showing the arrangement configuration of open tanks and the like in the sanitary washing device according to one embodiment of the present invention; 1 is a front perspective view of an open tank according to one embodiment of the present invention; FIG. 1 is a bottom perspective view of an open tank according to one embodiment of the present invention; FIG. 1 is a front view of an open tank according to one embodiment of the present invention; FIG. 1 is a plan view of an open tank according to one embodiment of the present invention; FIG. FIG. 8 is a cross-sectional view taken along the line AA in FIG. 7; FIG. 8 is a cross-sectional view taken along line BB in FIG. 7; 1 is a perspective view showing a state in which a lid member is removed from an open tank according to an embodiment of the present invention; FIG. 1 is a perspective view showing a lid member of an open tank according to one embodiment of the present invention; FIG. 1 is a plan view showing the internal structure of an open tank according to one embodiment of the present invention; FIG.

The present invention provides a configuration in which an open tank for forming an air gap for preventing backflow is provided in a supply path of cleansing water from a water supply source to a water discharge nozzle. By devising the configuration, it is intended to improve the drainage performance of surplus water in the tank and to make the device compact. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a configuration in which a sanitary washing device is installed on a western-style seated toilet bowl in a toilet device will be described as an example.

As shown in FIG. 1, a toilet apparatus 1 according to this embodiment includes a sanitary washing apparatus 2 for washing the private parts of a human body (user), and a toilet bowl 3 that is a Western-style seated toilet bowl. The sanitary washing device 2 is installed on the toilet bowl 3 in the toilet device 1 . The sanitary washing device 2 may be detachably attached to the toilet bowl 3 or may be integrally provided with the toilet bowl 3 .

The toilet bowl 3 has a concave bowl portion 3a with its upper side open. The toilet bowl 3 receives excrement such as urine and feces of the user of the toilet apparatus 1 in the bowl portion 3a.

The sanitary washing device 2 includes a device main body 4 in which various devices are incorporated in a casing 5 forming a housing, a toilet seat 6 and a toilet lid 7 which are rotatably supported with respect to the casing 5 of the device main body 4. and The sanitary washing device 2 has a device main body 4 positioned behind and above the bowl portion 3a with respect to the toilet bowl 3, and opens and closes an upper open portion of the bowl portion 3a by rotating the toilet seat 6 and the toilet lid 7. is provided as follows.

The sanitary washing device 2 will be described with reference to FIGS. 2 and 3. FIG. A casing 5 of the sanitary washing device 2 has a base plate 5a and a case cover 5b (see FIG. 1) covering the base plate 5a from above. Various device configurations incorporated in the casing 5 are installed on the base plate 5a. The base plate 5a includes a substantially horizontal plate-shaped bottom surface portion 5c and side wall portions appropriately formed along the periphery of the bottom surface portion 5c.

As shown in FIG. 2 , the sanitary washing device 2 has a control section 10 , an operation section 11 , a seating detection sensor 12 , a human body detection sensor 13 , a washing water supply section 14 and a water discharge nozzle 15 . Note that FIG. 2 also shows the configuration of the cleaning water supply path and the control configuration by the control unit 10 .

The control unit 10 controls the operation of each unit such as the cleaning water supply unit 14 . The control unit 10 controls the operation of each unit of the sanitary washing device 2 according to an input signal from the operation unit 11 based on the operation of the operation unit 11, for example. The operation unit 11 may be provided in the device main body 4 of the sanitary washing device 2 or may be provided separately from the device main body 4 . The operation unit 11 is provided as, for example, a remote controller. Further, the communication method between the control unit 10 and the operation unit 11 may be wired or wireless.

The seating detection sensor 12 detects the user just before sitting on the toilet seat 6 or the user sitting on the toilet seat 6 as the user's seating. The seating detection sensor 12 outputs the detection signal to the control section 10 . The seating detection sensor 12 is, for example, an infrared light emitting/receiving distance measuring sensor or a switch for detecting the load of the user sitting on the toilet seat 6 .

The human body detection sensor 13 detects a user entering the toilet room in which the toilet apparatus 1 is installed. Human body detection sensor 13 outputs the detection signal to control unit 10 . The human body detection sensor 13 is, for example, a radio wave sensor such as a pyroelectric sensor using infrared signals or a microwave Doppler sensor using microwaves.

The washing water supply unit 14 constitutes a flow path from a predetermined water supply source 20 such as a water supply or a water storage tank to a plurality of water discharging units including the water discharging nozzle 15, and supplies a plurality of washing water (water) supplied from the water supply source 20. is selectively supplied to the water discharge part. The cleaning water supply unit 14 includes a water stopcock 21 connected to the water supply source 20, a water supply valve unit 22, an open tank 40, a cleaning pump 24, a heat exchanger 25, and a flow path switching valve 26. have

The water stop cock 21 is an electromagnetic valve, and opens and closes the flow path of water supplied to the cleansing water supply unit 14 on the upstream side of the cleansing water supply unit 14 . In other words, the water stop valve 21 is a channel opening/closing valve that switches between supplying and stopping the washing water supplied from the water supply source 20 by its opening/closing operation. The stop cock 21 is connected to the controller 10 and opens and closes based on a control signal from the controller 10 . The water stop cock 21 is connected to the water supply valve unit 22 by a flow path configuration including a flexible hose 21a.

The water supply valve unit 22 includes a check valve 22a that prevents backflow of water to the upstream side, a strainer 22b that traps foreign matter in the water, a constant flow valve 22c that keeps the flow rate of water constant regardless of the water supply pressure, and an energization valve. and a solenoid valve 22d that opens to selectively switch between flowing water to the downstream side and stopping water. The electromagnetic valve 22 d is connected to the control section 10 and opens and closes based on a control signal from the control section 10 .

The open tank 40 is provided in a water supply path that supplies water supplied from the water supply source 20 to the water discharge nozzle 15 . In this embodiment, the open tank 40 is provided downstream of the water supply valve unit 22 . Water that has passed through the water supply valve unit 22 flows into the open tank 40 through the inflow pipe 28 . The open tank 40 stores therein the water that has flowed in from the inflow pipe 28 .

By forming an air gap inside the open tank 40, the water in the open tank 40 is cut off from the upstream side (inflow side) of the open tank 40 in the washing water supply part 14, 40 and the upstream side of the open tank 40 are physically cut off. As a result, washing water in the water discharge nozzle 15, sewage in the bowl portion 3a, and the like are prevented from flowing backward from the open tank 40 to the upstream side.

Water in the open tank 40 flows out to the outflow pipe 29 . A cleaning pump 24 is provided on the downstream side of the open tank 40 via a strainer 30 (see FIG. 3) provided in an outflow pipe 29 . The cleaning pump 24 has a pump main body 24a and a motor 24b as a driving part (see FIG. 3), sucks water from the open tank 40, and supplies the water to the downstream side of the open tank. The cleaning pump 24 is connected to the controller 10 , and the driving operation of the cleaning pump 24 is controlled based on control signals from the controller 10 .

A heat exchanger 25 functioning as a heating unit is provided downstream of the cleaning pump 24 . The heat exchanger 25 has a heater as a heat source, and the heater heats the water supplied from the washing pump 24 into warm water. The temperature of the hot water obtained by the heat exchanger 25 is set by the user in the operation section 11 via the control section 10, for example. The heat exchanger 25 may be, for example, an instantaneous heating type having a ceramic heater or the like as a heat source, or a hot water storage heating type having a sheathed heater or the like as a heat source and using a hot water storage tank. Further, the heating unit is not limited to a heat exchanger, and may be one using other heating methods such as those using microwaves.

A channel switching valve 26 is provided on the downstream side of the cleaning pump 24 . The flow path switching valve 26 switches the flow paths for the plurality of water discharge units to which the cleansing water is supplied. Destinations to which the washing water is supplied include the water discharge nozzle 15 . The flow path switching valve 26 is connected to the control section 10 , and the operation of the flow path switching valve 26 is controlled based on the control signal from the control section 10 . The sanitary washing device 2 supplies washing water to, for example, a nozzle washing chamber for washing the outer surface (body washing) of the water discharge nozzle 15 by discharging washing water from a predetermined water discharge port, or a predetermined spray nozzle. It has a spray nozzle or the like for spraying cleansing water onto the surface of the bowl portion 3a of the toilet bowl 3 from the mouth.

The water discharge nozzle 15 discharges water (washing water) for washing the private parts of the human body. The water discharge nozzle 15 has a plurality of water discharge holes 15a for discharging washing water. The water discharge holes 15a are, for example, a bottom washing water discharge hole and a soft bottom water discharge hole for washing the bottom, and a bidet washing water discharge hole for washing the bidet.

The water discharge nozzle 15 is provided so as to move back and forth from the device main body 4 to the bowl portion 3a of the toilet bowl 3 by a nozzle driving device 16 composed of an electric motor or the like (see arrow A1 in FIG. 3). The operation of the water discharge nozzle 15 is controlled by the controller 10 via a nozzle driving device 16 connected to the controller 10 . The water discharge nozzle 15 extends into the bowl portion 3a and jets cleansing water from the water discharge hole 15a in response to a switch operation or the like by the user of the toilet device 1. As shown in FIG.

In the water discharge nozzle 15, flow paths are formed that communicate with the water discharge holes 15a. These channels form a part of the water supply channel for washing the human body that communicates from the channel switching valve 26 to each water discharge hole 15a. According to the above example, the sanitary washing device 2 has, as a water supply flow path for washing the human body, a washing flow path that communicates with each of the buttocks washing, bottom soft water and bidet washing water discharge holes.

The channel switching valve 26 switches the channel (water supply channel) for supplying water to the plurality of water discharge holes 15 a of the water discharge nozzle 15 . The washing water supplied to each of the water discharge holes 15a is discharged upward from the water discharge holes 15a and is used for washing the private parts of the user sitting on the toilet seat 6, and the like. The flow path switched by the flow path switching valve 26 includes a flow path that communicates with the water discharge port of the nozzle cleaning chamber, a flow path that communicates with the spray port of the spray nozzle, and the like.

FIG. 3 shows an example of the layout configuration of the open tank 40 and the like in the casing 5. As shown in FIG. As shown in FIG. 3, in the sanitary washing device 2 according to this embodiment, the open tank 40 is arranged on the base plate 5a constituting the casing 5 at the rear end.

The open tank 40 has an overall elongated rectangular parallelepiped shape as described later. The open tank 40 is provided along the rear edge of the base plate 5a, which has a substantially rectangular shape in plan view, with the longitudinal direction being the left-right direction in plan view. At the rear edge of the base plate 5a, the open tank 40 is provided at a leftward position with respect to the left-right center.

In addition, a strainer 30 arranged in a flow path from the open tank 40 to the cleaning pump 24 is provided at the right rear corner of the base plate 5a, and the cleaning pump 24 is provided immediately in front of the strainer 30. ing. In other words, the cleaning pump 24 is provided at a position near the rear of the right end portion on the base plate 5a. The cleaning pump 24 is provided with the motor portion 24b facing forward.

A water discharge nozzle 15 is provided on the base plate 5a at the left-right central position of the front edge. Specifically, the base plate 5a has arcuate portions 5d that are convex rearward in plan view so as to correspond to the shape of the bowl portion 3a of the toilet bowl 3 in plan view at the left and right middle portions of the front edge portion. have. A water discharge nozzle 15 is provided in the left-right central portion of the circular arc portion 5d with its longitudinal direction as the front-rear direction (advance/retreat direction) in a plan view. The tip of the water discharge nozzle 15 is normally located behind the left-right central portion of the circular arc portion 5d, and protrudes forward from the left-right central portion of the circular arc portion 5d when washing water is discharged. The left and right center portions of the circular arc portion 5d form an open portion 5h, which is a non-formed side wall portion of the base plate 5a.

A heat exchanger 25 is provided in front of the open tank 40 on the base plate 5a. The heat exchanger 25 is positioned to the left of the water discharge nozzle 15 . A channel switching valve 26 is provided between the heat exchanger 25 and the water discharge nozzle 15 .

In the sanitary washing device 2 configured as described above, the water stored in the open tank 40 is supplied to the water discharge nozzle 15 by the washing pump 24 and discharged from the water discharge hole 15a of the water discharge nozzle 15. be. The user can adjust the amount of water sucked out of the open tank 40 by operating the operation section 11 or the like.

Therefore, for example, when the amount of water flowing out of the open tank 40 by the cleaning pump 24 is smaller than the amount of water supplied to the open tank 40 from the inflow pipe 28, surplus water in the open tank 40 occurs. The open tank 40 has an overflow portion in order to discharge surplus water in the open tank 40 to the outside. The water discharged by the overflow portion is discharged into the bowl portion 3a of the toilet bowl 3 as will be described later.

An open tank 40 according to this embodiment will be described with reference to FIGS. 4 to 12. FIG. As shown in FIGS. 4 to 12, an open tank 40 according to the present embodiment has a tank main body 41 having an elongated, substantially rectangular parallelepiped outer shape as a whole. It is located in the rear of the inside. As shown in FIGS. 1 and 4 , the front/rear, left/right, and up/down directions of the open tank 40 correspond to the front/rear, left/right, and up/down directions of the toilet device 1 .

The open-type tank 40 includes a tank body 41 forming a wash water storage space 41a, an inlet portion 42 for allowing water to flow into the tank body 41, and a water discharge nozzle 15 for allowing the water in the tank body 41 to flow out. and an outlet portion 43 . The downstream side of the inflow pipe 28 is communicatively connected to the inflow port portion 42 , and the upstream side of the outflow pipe 29 is communicatively connected to the outflow port portion 43 . That is, the wash water flows into the tank body 41 from the inflow pipe 28 through the inflow port portion 42 , and the wash water in the tank main body 41 flows out to the outflow pipe 29 through the outflow port portion 43 .

The tank main body 41 has a lower case portion 45 forming a major portion thereof, and a lid portion 46 forming an upper surface portion of the tank main body 41 . The outer shape of the tank main body 41 is configured by the lower case portion 45 and the lid portion 46 . The lower case portion 45 is provided with the outlet portion 43 , and the lid portion 46 is provided with the inlet portion 42 .

The lower case portion 45 is composed of a box-shaped case member 51 elongated in the left and right direction and having an open upper surface (see FIG. 10). The lid portion 46 is composed of a plate-like lid member 52 that corresponds to the shape of the opening of the case member 51 as a whole (see FIG. 11). 10 shows a state in which the cover member 52 is removed from the tank body 41, and FIG. 11 shows a perspective view of the cover member 52 from the lower surface side. Both the case member 51 and the lid member 52 are members made of resin. However, the member forming the tank main body 41 is not limited to being made of resin, and may be, for example, a metal member.

The lower case portion 45 has a horizontal bottom surface portion 47 and side wall portions 48 provided vertically along the periphery of the bottom surface portion 47 . The side wall portion 48 has a front wall portion 48a and a rear wall portion 48b facing each other with the left-right direction as a longitudinal direction, and a semi-cylindrical left wall portion 48c and a right wall portion 48d whose left side is convex. The side wall portion 48 has a substantially rectangular closed shape in a plan view, and has an upper end face 48e, which is an upper open end face, along a substantially horizontal plane. In addition, the side wall portion 48 has an inclined chamfered wall surface portion 48f having a chamfered shape in plan view at the right front corner portion.

The lower case portion 45 has a wide portion 45a having an opening width (opening dimension in the front-rear direction) that is slightly wider than the other portions at the upper portion of the right approximately ⅓ portion. On the other hand, the lower case part 45 has a deep bottom part 45b at its left end, which makes the storage space 41a deeper than the other parts. The deep bottom portion 45b forms the outer shape of the lower case portion 45, and has a bottom side protrusion 49 projecting downward from the left end of the lower case portion 45 in a substantially cylindrical shape. For this reason, the bottom surface portion 47 includes a first bottom surface portion 47a in a portion other than the deep bottom portion 45b, and a second bottom surface portion which is a surface portion stepped down from the first bottom surface portion 47a and which forms the bottom portion of the bottom side protrusion 49. 47b.

In the deep bottom portion 45b, the depth of the storage space 41a is deeper than that of the other portions because the bottom-side protrusion 49 protrudes downward. The left portion of the peripheral wall portion of the bottom-side protrusion 49 is a portion extending downward from the left wall surface portion 48c of the side wall portion 48, and the right portion is a substantially semi-cylindrical peripheral wall portion 49a. It's becoming

The lid portion 46 has an outer shape that conforms to the plan view shape of the lower case portion 45 , that is, the shape of the upper opening of the lower case portion 45 . The lid portion 46 has a horizontal body surface portion 53 as a portion forming a lid body portion that closes the upper opening of the lower case portion 45, and is provided vertically downward along the periphery of the body surface portion 53. and a peripheral wall portion 54 .

The lid portion 46 has a shape corresponding to the shape of the opening of the lower case portion 45 having the wide portion 45a as the plan view shape of the lid body portion. The lid portion 46 covers the lower case portion 45 from above so that the body surface portion 53 closes the upper opening of the lower case portion 45 and the peripheral wall portion 54 covers the upper end portion of the lower case portion 45 from the outside. is provided.

The lid portion 46 is fixed to the lower case portion 45 by engaging portions 55 provided at a plurality of locations around the lid body portion at predetermined intervals. In this embodiment, the engaging portions 55 are provided at three locations on the front side of the lid portion 46, three locations on the rear side, and one location on the left side, for a total of seven locations. The engaging portion 55 employs a so-called snap-fit method using elastic deformation, and includes an engaging protruding piece portion 55a projecting downward from the peripheral wall portion 54 of the lid portion 46 and forming an opening, and a lower portion. It has an engaging structure with an engaging projection 55b provided on the outer side of the upper end portion of the side wall portion 48 of the case portion 45 and fitted into the opening of the engaging projecting piece portion 55a.

A packing 56 as a sealing member is interposed between the lid member 52 forming the lid portion 46 and the case member 51 forming the lower case portion 45 . The packing 56 is fitted in a groove 58 formed by the peripheral wall portion 54 and an inner wall portion 57 provided inside the peripheral wall portion 54 along the peripheral wall portion 54 in the lid member 52 .

In such a configuration, the case member 51 and the lid member 52 have the upper end of the side wall portion 48 of the case member 51 fitted into the groove portion 58 of the lid member 52 to sandwich the packing 56, and the engagement portions 55 are provided at a plurality of locations. are fixed to each other in a water-tight manner by the engagement action of , forming the tank body 41 .

Further, in the tank main body 41, a pipe diameter switching portion 60 for switching the pipe diameter in the flow path on the downstream side of the open tank 40 is provided at the front lower corner portion on the right side of the lower case portion 45. . The pipe diameter switching unit 60 has an upstream connection pipe portion 60a and a downstream connection pipe portion 60b that have different pipe diameters to be connected. The upstream connection pipe portion 60a and the downstream connection pipe portion 60b are cylindrical portions protruding from a hollow base portion 60c protruding from the lower case portion 45, and communicate with each other through a hollow portion in the base portion 60c. is doing. In this embodiment, the pipe diameter switching unit 60 is used in the flow path between the cleaning pump 24 and the heat exchanger 25 .

A fixing projecting piece 61 for fixing the tank body 41 to the base plate 5a with a fixing tool such as a bolt is provided on the right rear side of the lower case portion 45 . In addition, a chemical injection port 62 for introducing a chemical such as a scale remover into the storage space 41a is provided in the central portion of the lid portion 46 in the left-right direction. The drug input port 62 is an opening facing the storage space 41a, which opens upward, is provided in a protruding manner on the back side of the main body surface portion 53, and has a predetermined guide surface such as a slope for guiding the drug. have

The inlet portion 42 is provided at the upper right end of the lid portion 46 as a portion that protrudes upward. The inlet portion 42 is configured by attaching an inlet forming member 65 to the lid member 52 . The lid member 52 has an inlet forming portion 66 which is formed so as to penetrate the main body surface portion 53 and which forms a flow path for the storage space 41a. The inlet forming portion 66 has a fitting opening portion 66a, which is a box-shaped portion with the upper side open, as a portion to which the inlet forming member 65 is attached.

The inlet forming member 65 has a dome-shaped cap portion 65a whose lower side is open. The inflow port forming member 65 is provided with a cap portion 65a fitted into the fitting opening portion 66a of the inflow port forming portion 66, and communicates with the upper side of the storage space 41a together with the inflow port forming portion 66 to the storage space 41a. An inflow-side hollow portion 67 is formed (see FIG. 8). The inflow port forming member 65 is fixed to the fitting port portion 66a by two front and rear engagement portions 66b adopting a snap-fit method. The engaging portion 66b includes engaging projecting pieces protruding upward from the front and rear walls of the fitting opening portion 66a and forming openings, and openings of the engaging projecting pieces provided on the front and rear surfaces of the cap portion 65a. It has an engaging structure with an engaging protrusion that fits into the part.

A cylindrical connection pipe portion 65b is provided on the upper side of the cap portion 65a of the inlet forming member 65 as a portion for receiving the downstream connection of the inflow pipe 28 . The connection pipe portion 65b forms a straight pipe line extending downward to the left from the central portion of the cap portion 65a in a front view, and opens obliquely downward to the left. Further, in the inlet forming member 65, a projecting pipe portion 65c is provided so as to communicate with the base end side of the pipe line of the connection pipe portion 65b (see FIG. 8). The protruding pipe portion 65c projects downward from the central portion of the cap portion 65a into the inflow-side hollow portion 67, forming a linear pipe path along the vertical direction. . A water inlet passage 65d bent at an acute angle is formed by the connecting pipe portion 65b and the projecting pipe portion 65c.

In the inflow port forming portion 66, a guide flow channel forming portion 70 that forms a guide flow channel 69 that guides washing water into the storage space 41a is provided below the fitting opening portion 66a. The guide channel 69 is a space portion that continues downward with respect to the inflow-side hollow portion 67, and is a channel between the inflow-side hollow portion 67 and the storage space 41a. The guide flow passage forming portion 70 has its lower portion protruding downward from the main body surface portion 53 in a substantially box-like shape, and forms an inflow opening 70a facing the inside of the storage space 41a together with the main body surface portion 53 and the like. there is In this embodiment, the guide channel forming portion 70 is formed so as to open the inflow opening portion 70a toward the left side.

Below the projecting pipe portion 65c, the guide flow path forming portion 70 has a guide surface 70b that receives the washing water flowing downward from the projecting pipe portion 65c and guides it to the inflow opening portion 70a. The guide surface 70b includes a surface portion inclined or curved downward to the left toward the inflow opening 70a. The guide channel forming portion 70 has a lower right side portion 70c forming a guide surface 70b and a front side portion 70d as portions forming the inflow opening portion 70a (see FIG. 11).

In addition, the inlet forming member 65 is formed with an atmosphere opening hole 65e for opening the storage space 41a to the atmosphere. In this embodiment, the holes 65e for opening to the atmosphere are provided at two front and rear positions on the right side of the base of the connecting pipe portion 65b in the cap portion 65a.

The outflow port portion 43 protrudes forward from the left lower portion of the lower case portion 45 . The outlet portion 43 is configured by attaching an outlet forming member 72 to the case member 51 . The case member 51 has an outlet forming portion 73 as a portion to which the outlet forming member 72 is attached.

The outflow port forming portion 73 has a through pipe portion 73a formed in a tubular shape so as to penetrate the left wall surface portion 48c substantially in the front-rear direction on the front side of the lower portion of the left wall surface portion 48c forming the bottom-side protrusion 49 . An outflow port forming member 72 is attached to a portion of the through pipe portion 73a protruding outward from the left wall surface portion 48c.

The outflow port forming member 72 has a hollow main body portion 72a attached to the outer projecting portion of the through pipe portion 73a, and a cylindrical connection pipe portion 72b protrudes from the main body portion 72a. The connection pipe portion 72b is a portion that receives the connection on the upstream side of the outflow pipe 29, forms a substantially horizontal pipe line in front of the bottom-side protrusion 49, and opens toward the right side. The connection pipe portion 72b forms a straight drainage path toward the right.

The open tank 40 has a float sensor 75 which is a water level sensor for detecting the level of water accumulated in the tank body 41 . The float sensor 75 has a shaft-shaped sensor body portion 75a whose axial direction is the vertical direction, and a cylindrical float portion 75b provided in a flange shape so as to pass through the sensor body portion 75a. The float sensor 75 is provided in a deep bottom portion 45 b provided on the left side of the tank main body 41 while being supported by a sensor mounting portion 76 protruding downward from the main body surface portion 53 .

The float sensor 75 has two upper and lower reed switches in the sensor body portion 75a, and moves up and down according to the fluctuation of the water level in the tank body 41 by the float portion 75b. The float sensor 75 is configured to detect the minimum water level H1 and the maximum water level H2 as the water level in the tank body 41 by turning on/off two reed switches as the float sensor 75 moves up and down (see FIG. 8). The float sensor 75 exposes the upper end of the sensor main body 75a to the outside through an opening 53a formed in the main body surface 53, and extends a signal line 75c from the reed switch. A detection signal of the float sensor 75 is input to the control section 10 via the signal line 75c. As the water level sensor, any suitable sensor can be used as long as it can detect the water level in the tank main body 41 .

The water supply operation using the water level detection by the float sensor 75 is performed, for example, in the following manner. When the seating detection sensor 12 detects that the user is seated, the controller 10 opens the water shutoff valve 21 and supplies water to the open tank 40 until the float sensor 75 detects the minimum water level H1. When washing the private part by operating the operation unit 11 or the like, water is supplied to the open tank 40 , and the washing pump 24 is driven to supply washing water to the water discharge nozzle 15 . Here, the cleaning pump 24 is driven under the condition that the water level in the tank body 41 is equal to or higher than the minimum water level H1, and when the water level in the tank body 41 reaches the maximum water level H2, water is supplied to the open tank 40. stops.

In such an open tank 40, as shown in FIG. 8, the maximum water level H2 in the tank body 41 is below the height position H0 of the open end of the projecting pipe portion 65c serving as the inlet to the storage space 41a. located in An air gap is formed in the tank body 41 by the height difference ΔH between the height position H0 and the highest water level H2. Such an air gap prevents backflow in the cleaning water supply path.

The open tank 40 configured as described above has a first discharge port 81 and a second discharge port 82 as discharge ports for discharging surplus water in the tank body 41 to the outside. The first discharge port 81 and the second discharge port 82 are provided so as to allow communication between the inside and the outside of the tank body 41, and both open upward. The first discharge port 81 and the second discharge port 82 are provided such that an air gap is formed between the inlet portion 42 and the water surface inside the tank body 41 .

The first discharge port 81 will be explained. The first discharge port 81 is provided in the tank body 41 at a position closer to the right side than the central portion in the left-right direction. Specifically, the first discharge port 81 is positioned in the wide portion 45a of the lower case portion 45 in the left-right direction, and is provided in an intermediate portion between the front wall surface portion 48a and the rear wall surface portion 48b in the front-rear direction. ing. The first discharge port is located in the vicinity of the inflow opening 70a of the inflow port 42 and diagonally to the rear left of the inflow opening 70a in plan view.

The first discharge port is provided as a first overflow pipe 83 which is a square tubular portion with both upper and lower sides open and which is formed in a manner penetrating the bottom surface portion 47 of the lower case portion 45 in the vertical direction. The first overflow pipe 83 is divided in the vertical direction as a portion above the bottom surface portion 47, that is, an upper projection portion 83a that projects upward from the bottom surface portion 47 in the storage space 41a, and an upper projection portion 83a that projects upward from the bottom surface portion 47 It has a lower portion, that is, a lower protruding portion 83b that protrudes downward from the bottom portion 47 outside the storage space 41a. Most of the first overflow pipe 83 in the vertical direction is an upper projecting portion 83a.

The first overflow pipe 83 has a rectangular cross-sectional shape whose longitudinal direction is the horizontal direction, and the upper and lower opening shapes (the opening shapes of the upper opening portion 83g and the lower opening portion 83h) are rectangular. Therefore, the first overflow pipe 83 has a front wall portion 83c, a rear wall portion 83d, a left wall portion 83e, and a right wall portion 83f, which are walls that are all perpendicular to the bottom surface portion 47. As shown in FIG. The first overflow pipe 83 has a uniform cross-sectional shape and dimensions throughout the vertical direction. The inner peripheral surface of the first overflow pipe 83 forms a vertical channel 83j having a rectangular channel cross-sectional shape.

The first discharge port 81 is provided so that the upper opening 83g of the first overflow pipe 83 opened in the storage space 41a is along the horizontal plane. In other words, the upper opening 83g of the first overflow pipe 83 has its opening end face along the horizontal plane. The first overflow pipe 83 is arranged such that the height of the upper opening 83g is located above the central position of the storage space 41a in the vertical direction.

A packing 84 as a sealing member is provided around the lower projecting portion 83b of the first overflow pipe 83 . The packing 84 is a groove portion formed along the outer shape of the lower projecting portion 83b on the lower surface side of the bottom surface portion 47 by the lower projecting portion 83b and the ridge portion 85 provided outside the lower projecting portion 83b. 86 is fitted.

On the other hand, the side of the base plate 5a on which the open tank 40 is installed is provided with a rectangular cylindrical discharge port 5e into which the lower projecting portion 83b is fitted (see FIG. 9). The outlet portion 5e projects upward from the bottom portion 5c of the base plate 5a, and is open on both upper and lower sides so as to penetrate the bottom portion 5c.

In this configuration, when the open tank 40 is installed on the base plate 5a, the discharge port 5e has the lower projecting portion 83b inserted therein and the upper end thereof fitted in the groove 86, thereby The packing 84 is sandwiched together with the portion 45 . As a result, the first overflow pipe 83 and the discharge port 5e are connected in a water-tight manner, forming a drainage channel that communicates the inside of the storage space 41a with the outside of the casing 5 on the lower side. That is, the opening 5f below the discharge port 5e serves as a discharge port to the outside of the casing 5. As shown in FIG. A lower opening 83h of the first overflow pipe 83 is located inside the discharge port 5e.

In addition, a positioning projection 87 protrudes downward from the lower surface side of the left portion of the bottom surface portion 47 . The protrusion 87 is inserted into a cylindrical positioning cylinder portion 5g that protrudes upward from the bottom surface portion 5c of the base plate 5a.

The second discharge port 82 will be explained. The second discharge port 82 is provided substantially in the center of the tank body 41 in the left-right direction. Therefore, the second discharge port 82 is positioned to the left of the first discharge port 81 .

The second discharge port 82 has a second overflow pipe 93 which is a bottomed cylindrical portion with an open top and is formed in a manner vertically penetrating the bottom surface portion 47 of the lower case portion 45 . The second overflow pipe 93 is provided in the tank main body 41 at a position closer to the front side in the front-rear direction, that is, at a position near the front wall surface portion 48a. The second overflow pipe 93 is divided in the vertical direction as a portion above the bottom surface portion 47 , that is, an upper projection portion 93 a that projects upward from the bottom surface portion 47 in the storage space 41 a and an upper projection portion 93 a that projects upward from the bottom surface portion 47 It has a lower portion, that is, a lower protruding portion 93b that protrudes downward from the bottom portion 47 outside the storage space 41a. The second overflow pipe 93 has an upper protruding portion 93a in most of the vertical direction.

The second overflow pipe 93 has a circular cross-sectional shape, and the upper opening shape (the opening shape of the upper opening portion 93g) is circular. Therefore, the second overflow pipe 93 has a cylindrical peripheral wall portion 93 c perpendicular to the bottom portion 47 . In addition, the second overflow pipe 93 has a bottom portion 93d forming the bottom surface portion of the second overflow pipe 93 at the lower projecting portion 93b, and the lower projecting portion 93b is projected in a cylindrical shape below the bottom surface portion 47. there is The second overflow pipe 93 has a uniform cross-sectional shape and dimensions throughout the vertical direction. The second overflow pipe 93 forms a vertical channel 93j having a circular channel cross-sectional shape.

In this embodiment, the opening area (flow path area) of the second overflow pipe 93 is smaller than the opening area (flow path area) of the first overflow pipe 83 . However, the size relationship between the opening areas (flow path areas) of both overflow pipes is not particularly limited.

The second discharge port 82 is provided so that the upper opening 93g of the second overflow pipe 93 opened in the storage space 41a is along the horizontal plane. That is, the upper opening portion 93g of the second overflow pipe 93 has its opening end face along the horizontal plane. The second overflow pipe 93 is arranged so that the height of the upper opening 93g is located above the central position of the storage space 41a in the vertical direction.

The second discharge port 82 has a connection pipe portion 94 formed in a manner that penetrates the peripheral wall portion 93c of the lower projection portion 93b of the second overflow pipe 93 in the front-rear direction. The connecting pipe portion 94 is a cylindrical portion with both front and rear sides open, and has a rear portion 94c protruding inside the lower projecting portion 93b (see FIG. 12), and a front portion being a front projecting portion. 94a projects forward from the front wall surface portion 48a. The connection pipe portion 94 forms a flow path 94b extending in the front-rear direction and having a circular flow path cross-sectional shape by its inner peripheral surface.

One end of a drainage pipe 95 is connected to the front projecting portion 94 a of the connecting pipe portion 94 . The drain pipe 95 extends forward from the connecting pipe portion 94, and the other end thereof serves as a drain port 95a. The drain pipe 95 is arranged on the base plate 5a in the front-rear direction, is positioned to the left of the water discharge nozzle 15, and extends so that the discharge port 95a is positioned near the central portion of the arc portion 5d of the base plate 5a. (See Figure 3). The drain pipe 95 bends the end of the other end side (front end side) so that the drain port 95a opens toward the open portion 5h of the base plate 5a in plan view, and the drain port 95a opens toward the right side. I am letting

As described above, for the second discharge port 82, the second overflow pipe 93 and the connecting pipe portion 94 that constitute the second discharge port 82, and the drain pipe 95 connected to the connecting pipe portion 94 allow the inside of the storage space 41a and the A drainage channel is formed to communicate with the inside of the casing 5 .

As described above, in the open tank 40 having the first discharge port 81 and the second discharge port 82, the height of the opening position of the second discharge port 82 is lower than the height of the opening position of the first discharge port 81. ing.

As shown in FIG. 9, in the present embodiment, regarding the height position in the vertical direction, the opening position P1 of the first discharge port 81 is the height position of the opening end face of the upper opening 83g of the first overflow pipe 83. . Further, the opening position P2 of the second discharge port 82 is the height position of the opening end surface of the upper opening 93g of the second overflow pipe 93 . The opening position P2 of the second discharge port 82 is lower than the opening position P1 of the first discharge port 81 . The opening position P1 of the first discharge port 81 is substantially the same height as the upper end face 48e of the side wall portion 48. As shown in FIG. Both the opening position P1 of the first outlet 81 and the opening position P2 of the second outlet 82 are higher than the highest water level H2 in the tank body 41 (see FIG. 8).

In this embodiment, the tank main body 41 has the following structure regarding the height of the opening positions of the first discharge port 81 and the second discharge port 82 . The top surface 47c of the first bottom surface portion 47a of the bottom surface portion 47 on which the first overflow pipe 83 and the second overflow pipe 93 stand is a substantially horizontal (slightly downward left) surface. The projection lengths of the first overflow pipe 83 and the second overflow pipe 93 from the upper surface 47c, that is, the heights of the upper projections 83a and 93a relative to the upper surface 47c are higher than the upper projection 93a. The protrusion 83a is higher. In this embodiment, the height ratio between the upper protruding portion 83a and the upper protruding portion 93a is about 3:2.

The second discharge port 82 has an upper projecting portion 93 a of the second overflow pipe 93 projecting above the bottom surface portion 47 as a cylindrical portion erected on the bottom portion of the tank body 41 . The upper protruding portion 93a is a cylindrical portion erected on the upper surface 47c of the first bottom surface portion 47a of the bottom surface portion 47. As shown in FIG.

Further, in the present embodiment, the first discharge port 81 also has a cylindrical portion erected on the bottom of the tank body 41 like the second discharge port 82 . Such a cylindrical portion is an upper protrusion 83a of the first overflow pipe 83 that protrudes above the bottom surface portion 47, and the upper protrusion 83a has a square tubular shape that is erected on the upper surface 47c of the first bottom surface portion 47a. is part of

In the open tank 40 according to the present embodiment, the tank main body 41 includes a rectifying plate portion 96 as a rectifying portion provided between the inflow port portion 42 and the first discharge port 81 and the second discharge port 82. have

The straightening plate portion 96 is a plate-like portion provided perpendicular to the bottom surface portion 47 so as to partition the inside of the storage space 41a. In the present embodiment, the rectifying plate portion 96 extends vertically downward from the main body surface portion 53 of the lid member 52 and is provided in a rib shape as a part of the lid member 52 which is a resin molded product. (see Figure 11).

The straightening plate portion 96 is provided over substantially the entire vertical direction between the main body surface portion 53 of the lid portion 46 and the bottom surface portion 47 (first bottom surface portion 47a) of the lower case portion 45, which forms the storage space 41a. . That is, the current plate portion 96 extending downward from the main body surface portion 53 is provided so that its lower end is in contact or substantially in contact with the upper surface 47c of the bottom surface portion 47, and forms a partition in the storage space 41a. make up the part.

The straightening plate portion 96 is provided in a portion of the tank body 41 where the wide portion 45a is formed in the left-right direction. Specifically, in the side wall portion 48, the front wall portion 48a bulges forward from the upper portion of the right wall portion forming the wide portion 45a, while the rear wall portion 48b is generally flat. It has a projecting bulging portion 48g. A chamfered wall surface portion 48f is formed on the right side of the portion of the front wall surface portion 48a where the bulging portion 48g is formed.

A rectifying plate portion 96 is provided in the storage space 41 a so as to face the front right wall portion of the side wall portion 48 . The straightening plate portion 96 has a predetermined curved shape in a plan view so as to follow the shape of the front right wall surface portion of the side wall portion 48 . Specifically, the current plate portion 96 has a lateral wall portion 96a, a vertical wall portion 96b, and an inclined wall portion 96c as curved surface portions.

The lateral wall portion 96a is a wall portion parallel to the left-right direction. The vertical wall surface portion 96b is provided on the left side of the horizontal wall surface portion 96a, bends forward with respect to the horizontal wall surface portion 96a, and forms a substantially right angle with the horizontal wall surface portion 96a. The inclined wall surface portion 96c is provided on the right side of the lateral wall surface portion 96a and is an inclined wall surface portion that is bent rearward to form an obtuse angle with respect to the lateral wall surface portion 96a. The straightening plate portion 96 has a cross section formed by these wall portions with substantially constant shape and dimensions in the vertical direction.

The straightening plate portion 96 has the front end portion of the vertical wall portion 96b, which is the left end thereof, in contact or substantially in contact with the front wall portion 48a. Here, the vertical wall surface portion 96b has an approximately "L"-shaped notch portion 96d at its lower portion along the stepped wall surface shape of the front wall surface portion 48a having the bulging portion 48g (see FIG. 11). On the other hand, the straightening plate portion 96 separates the right end portion of the inclined wall portion 96 c , which is the right end portion, from the side wall portion 48 . In other words, a gap 97 is formed between the right end of the current plate portion 96 and the side wall portion 48 (see FIG. 12).

The straightening plate portion 96 regionally separates a portion of the tank body 41 where the inflow opening portion 70a of the inflow port portion 42 is provided and a portion where the first overflow pipe 83 and the second overflow pipe 93 are provided. is provided as follows. That is, an inflow opening 70a is formed on the front side of the rectifying plate portion 96 so as to open toward the left, and a first overflow pipe 83 is provided on the rear side of the lateral wall portion 96a of the rectifying plate portion 96. A second overflow pipe 93 is provided at the left rear of the corner between the lateral wall portion 96a and the vertical wall portion 96b of the straightening plate portion 96. As shown in FIG. In particular, the first overflow pipe 83 is positioned substantially in the center between the lateral wall portion 96a of the current plate portion 96 and the rear wall portion 48b. A wall portion on the rear side of the guide channel 69 forming the inflow opening portion 70a, that is, a wall portion substantially facing the front side surface portion 70d at the rear side is a part of the inclined wall surface portion 96c of the rectifying plate portion 96 (upper left corner). corner).

In this way, the rectifying plate portion 96 has a region 98 into which water flows from the inflow opening 70a in the tank main body 41 as a region where the first overflow pipe 83 and the second overflow pipe 93 are arranged (hereinafter referred to as “discharge port arrangement”). (refer to FIG. 12). In other words, the straightening plate portion 96 is provided so as to surround a region 98 into which water flows from the inflow opening portion 70 a in the tank body 41 together with the front right portion of the side wall portion 48 .

The flow of water in the open tank 40 according to this embodiment having the above configuration will be described. In the open tank 40, water supplied from the inflow pipe 28 flows into the guide flow path 69 from the water flow path 65d in the inflow port portion 42 through the inflow side hollow portion 67 (Fig. 8, arrow F1 reference).

The water that has flowed into the guide channel 69 flows on the guide surface 70b and flows into the storage space 41a through the inflow opening 70a (see arrow F2 in FIG. 8). Here, in the tank main body 41, a region 98 into which water flows from the inflow opening portion 70a is separated from the discharge port arrangement region by the rectifying plate portion 96. It is possible to suppress the influence of water splashes and water surface turbulence caused by the landing of inflow water from the portion 70a on the pooled water in the discharge port arrangement area. As for the water flowing into the tank main body 41, the amount of water supply is controlled by the sensing of the float sensor 75 as described above.

On the other hand, the water stored in the storage space 41a is discharged to the outflow pipe 29 through the drainage channel in the outflow port 43 by driving the cleaning pump 24 (see arrow F3 in FIG. 7). The water flowing out of the tank main body 41 is guided to the cleaning pump 24 through the strainer 30 by the outflow pipe 29, passes through the heat exchanger 25 from the cleaning pump 24, and flows to a predetermined flow selected by the flow switching valve 26. The water is supplied to the water discharge nozzle 15 through the passage and discharged from a predetermined water discharge hole 15a.

Next, the action of the first discharge port 81 and the second discharge port 82 in the open tank 40 will be described. For example, when the amount of water flowing out of the open tank 40 due to the operation of the cleaning pump 24 is smaller than the amount of water flowing into the open tank 40, the water level in the tank body 41 rises and the second outlet 82 is closed. When the opening position P2 is exceeded, the water in the tank flows into the second overflow pipe 93 and is discharged outside as surplus water.

The water that has flowed into the second overflow pipe 93 flows into the connecting pipe portion 94 through the inside of the lower projecting portion 93b, is guided forward by the drain pipe 95, and is discharged from the discharge port 95a. Water discharged from the discharge port 95a flows along the base plate 5a and is discharged into the bowl portion 3a of the toilet bowl 3 through the opening 5h (see arrow G1 in FIG. 3).

In addition, for example, when the amount of water supplied from the open tank 40 is larger than the amount of water discharged from the open tank 40, the water level in the tank further rises, the water level in the tank main body 41 rises, and the opening position P1 of the first discharge port 81 rises. , the water in the tank flows into the first overflow pipe 83 and is discharged outside as surplus water. The water that has flowed into the first overflow pipe 83 is discharged downward from the opening 5f of the base plate 5a to the outside of the casing 5 through the lower opening 83h (see arrow G2 in FIG. 9).

As described above, the open tank 40 according to the present embodiment has a structure for discharging surplus water in the tank. It has a first discharge port 81 functioning as an overflow part as a stage, and has a two-stage overflow structure. That is, as the water level in the tank, the opening position P2 of the second discharge port 82 is the first overflow water level, the opening position P1 of the first discharge port 81 is the second overflow water level, and the water level in the tank is the overflow water level. , the wash water in the tank is discharged out of the tank through the second discharge port 82 and/or the first discharge port 81 .

The opening position P1 of the first discharge port 81, which is the higher opening position of these discharge ports, is lower than the height position H0 of the opening end of the projecting pipe portion 65c serving as the inlet to the storage space 41a. located in A height difference ΔP1 between the height position H0 and the opening position P1 is the air gap for the discharge structure for excess water in the tank (see FIGS. 8 and 9). That is, even if the water level in the tank reaches the opening position P1, the surplus water is discharged through the first discharge port 81, so that the air gap due to the height difference ΔP1 is maintained and the cleaning water supply path is maintained. Backflow is prevented.

Similarly, the opening position P2 of the second discharge port 82, which is the lower opening position, is located below the height position H0, and the height difference ΔP2 between the height position H0 and the opening position P2 is the air gap for the excess water discharge structure in the tank. That is, even if the water level in the tank reaches the opening position P2, the surplus water is discharged through the second discharge port 82, so that the air gap due to the height difference ΔP2 is maintained and the cleaning water supply path is maintained. Backflow is prevented. Thus, the first discharge port 81 and the second discharge port 82 are provided such that an air gap is formed between the inlet portion 42 and the water surface inside the tank body 41 .

According to the sanitary washing device 2 having the open tank 40 according to the present embodiment configured as described above, it is possible to improve the drainage performance of excess water in the tank in the open tank 40, and to make the device compact. can be improved.

That is, according to the open tank 40 according to the present embodiment, since it has a two-stage overflow structure with the first discharge port 81 and the second discharge port 82, in comparison with a configuration having a single drainage structure, each Drainage performance of the purified water in the tank can be improved without increasing the opening area and pipe diameter of the overflow pipe.

In addition, since it is possible to suppress the expansion of the opening area and pipe diameter of each overflow pipe, it is possible to increase the flow area of the drainage pipe for leading surplus water to the bowl of the toilet, such as the drainage pipe 95. can be avoided. As a result, it becomes easy to avoid interference of the drainage pipe with various devices and devices arranged in front of the open tank 40 in the sanitary washing device 2, and the size of the device can be reduced. be able to.

Further, according to the configuration having the first discharge port 81 and the second discharge port 82, it is possible to sufficiently secure an opening area for discharging surplus water in the tank while suppressing the height of each overflow pipe. It becomes possible. Also from this point of view, the height dimension of the open tank 40 can be suppressed, and the compactness of the apparatus can be achieved. As described above, according to the open tank 40 according to the present embodiment, it is possible to achieve both improvement in the performance of draining surplus water in the tank and downsizing of the device.

Further, in the open tank 40 according to the present embodiment, the height of the opening position P2 of the second discharge port 82 is lower than the height of the opening position P1 of the first discharge port 81 .

According to such a configuration, when the water level in the tank rises, the water is drained from the second discharge port 82 first as the first stage. can be prevented from being discharged out of the tank as surplus water. In addition, since water is drained in two stages by the second outlet 82 and the first outlet 81, when the water level in the tank rises for some reason, the user is made aware of the overflowed water in the first stage. be able to. As a result, it becomes possible to detect an abnormality in the water level in the tank at an early stage.

Further, in the open tank 40 according to this embodiment, the second discharge port 82 has a cylindrical portion erected at the bottom of the tank body 41 .

According to such a configuration, it is easier to ensure drainage performance than, for example, a wall hole type configuration in which an opening directly opened in the side wall portion 48 of the tank body 41 is provided as an overflow port (drainage port). As a result, the size of the open tank 40 can be reduced. That is, in the case of the wall hole type structure, there are relatively large restrictions on the shape of the opening in order to ensure drainage performance. hindrance to In this regard, by configuring the second discharge port 82 as a cylindrical portion in the tank with an upward opening as in the present embodiment, it becomes easy to enlarge the opening in order to ensure drainage performance. Moreover, it is possible to easily reduce the size of the open tank 40 . As a result, it is possible to contribute to making the sanitary washing device 2 more compact.

In particular, in the open tank 40 according to this embodiment, in addition to the second discharge port 82, the first discharge port 81 also has a cylindrical portion that opens upward. According to such a configuration, it is possible to further improve the drainage performance in the configuration for discharging surplus water in the tank, and to effectively reduce the size of the device.

In addition, the second discharge port 82 has a circular opening of the upper opening 93g of the second overflow pipe 93, and has an opening end surface along a horizontal plane. According to such a configuration, in the process in which the water level in the tank rises, water simultaneously and uniformly flows into the second overflow pipe 93 from the entire circumference of the upper opening 93g. Good drainage performance can be obtained.

In addition, in the open tank 40 according to the present embodiment, the tank body 41 has a rectifying plate portion 96 provided between the inlet portion 42 and the first outlet 81 and the second outlet 82 .

According to such a configuration, the water flowing into the tank main body 41 from the inlet portion 42 is rectified by the rectifying portion, so that the water level in the tank main body 41 can be stabilized. In addition, it is possible to suppress the influence of water splashes and water surface turbulence caused by the inflow water from the inflow opening 70a landing on the water stored in the tank main body 41 in the area where the discharge port is provided.

Therefore, according to the configuration in which the rectifying plate portion 96 is provided, the first overflow occurs as the water is supplied into the tank due to water splashing and disturbance of the water surface caused by the inflow water landing on the water stored in the tank main body 41. Water can be prevented from entering the pipe 83 and the second overflow pipe 93 . As a result, it is possible to prevent water from being drained from the first discharge port 81 or the second discharge port 82 regardless of the increase in the overall water level in the tank.

At the first outlet 81 and the second outlet 82, the adhesion and deposition of scales in the flow paths clog the flow paths and reduce the drainage performance. For this reason, from the viewpoint of avoiding the adhesion and deposition of scales in the drainage channel, the first discharge port 81 and the second discharge port should be kept as far as possible except in the case of an abnormality in which the water level in the tank rises excessively as a whole. Preferably, 82 is free of water. Therefore, by providing the rectifying plate portion 96, it is possible to prevent water from entering the first discharge port 81 and the second discharge port 82, thereby preventing deterioration of drainage performance due to adherence and accumulation of scale.

The sanitary washing device according to the present invention, which has been described using the embodiments as described above, is not limited to the above-described embodiments, and various aspects can be adopted within the scope of the present invention.

In the above-described embodiment, the shape of the opening above the first discharge port 81 is rectangular, and the shape of the opening above the second discharge port 82 is circular, but these opening shapes are not particularly limited. Therefore, the opening shape of these outlets may be a polygonal shape such as a triangular shape or a hexagonal shape, an elliptical shape, or the like.

In the above-described embodiment, the rectifying plate portion 96 as the rectifying portion is formed as a part of the lid member 52 forming the lid portion 46, but it is not limited to such a configuration. . The rectifying section may be provided as a part of the case member 51 forming the lower case section 45, or may be configured by a member separate from the case member 51 and the lid member 52. good.

Further, in the above-described embodiment, the downstream side of the drainage channel formed by the first outlet 81 is opened directly below the base plate 5a, and the downstream side of the drainage channel formed by the second outlet 82 is The drain pipe 95 extends forward while opening toward the front of the lower case part 45 , but the configuration of the drain channel by each outlet is not particularly limited. Both drain channels may be configured to open downward like the first outlet 81, or both drain channels may be configured to open forward like the second outlet 82. may

However, when the water level in the tank rises, the first discharge port 81, which drains water at a higher water level, is provided as a preliminary discharge port for the second discharge port 82. It is preferable that the drainage channel by the outlet 82 is configured to open toward the front of the lower case portion 45 and extend forward by the drainage pipe 95 as in the above-described embodiment. As a result, the surplus water in the tank can be discharged into the bowl portion 3a of the toilet bowl 3 through the second discharge port 82 and the drain pipe 95 except in an emergency when the water is drained through the first discharge port 81. Further, since the first outlet 81 has a configuration in which the downstream side of the drainage channel is opened directly toward the lower side of the base plate 5a, a drainage pipe is provided in the drainage channel by the first outlet 81. Since it is not necessary, the size of the device can be reduced.

REFERENCE SIGNS LIST 1 toilet device 2 sanitary washing device 15 water discharge nozzle 20 water supply source 40 open tank 41 tank main body 42 inflow port 43 outflow port 70a inflow opening 81 first discharge port 82 second discharge port 83 first overflow pipe 83g upper opening Part 93 Second overflow pipe 93a Upper protrusion 93g Upper opening 96 Straightening plate part (rectifying part)

Claims (5)

A sanitary washing device for washing the private parts of a human body,
a water discharge nozzle that discharges water for washing the private parts of the human body;
an open tank provided in a water supply path that supplies water supplied from a water supply source to the water discharge nozzle;
The open tank is
tank body and
an inlet portion for allowing water to flow into the tank body;
an outflow port portion that causes water in the tank body to flow out to the water discharge nozzle;
a first discharge port and a second discharge port provided to form an air gap between the inlet portion and the water surface in the tank body, and for discharging surplus water in the tank body to the outside; , and
The sanitary washing device, wherein the second discharge port opens upward. The sanitary washing device according to claim 1, wherein the first discharge port opens upward. 3. The sanitary washing device according to claim 1, wherein the height of the opening position of the second discharge port is lower than the height of the opening position of the first discharge port. The tank body is
The sanitary washing device according to any one of claims 1 to 3, further comprising a straightening section provided between the inlet section and the first outlet and the second outlet. The sanitary washing device according to any one of claims 1 to 4, wherein the second discharge port has a cylindrical portion erected on the bottom of the tank body.

Images