JP5343959B2 - Sanitary washing device - Google Patents

Description

  Aspects of the present invention generally relate to a sanitary washing apparatus, and more specifically, to a sanitary washing apparatus for washing a user's “butt” or the like seated on a Western-style seated toilet with water.

  Conventionally, water is discharged from the local washing nozzle as it is, and the washing range (washing area at the time of water landing) is moved without moving the local washing nozzle separately from the water discharge for washing the female local area, that is, the vaginal opening and its surroundings. As an expanding technique, there is known a human body cleaning device that can discharge cleaning water swirled in a spiral shape from a water discharge hole of a nozzle (Patent Document 1). Further, as a similar technique, there is also known a water discharge device that can discharge subdivided wash water in a swiveling state (Patent Document 2).

  The nozzles for local washing as disclosed in Patent Documents 1 and 2 generally advance into the bowl of the toilet bowl, and discharge the washing water from the diagonally rear side of the user seated on the toilet seat. Therefore, when water flows from the base of the nozzle toward the tip side where the water discharge holes are formed, a forward momentum that is the advance direction of the nozzle is generated in the cleaning water. Therefore, if the wash water with forward momentum enters the swirl imparting chamber that imparts a swirling force to the wash water from the same direction as the nozzle advancement direction, the momentum of the wash water in the incoming direction is maintained. There is a risk of being. Then, the washing water supplied to the swirl imparting chamber is not sufficiently imparted with the swirl force, and may flow out from the water discharge hole in the substantially same direction as the water entering direction. As a result, the wash water discharged from the water discharge holes does not land on the target local area, and may escape from between the crotch and scatter around the user's thigh or may be discharged on the user's thigh. In this respect, there is room for improvement in order to prevent the user from feeling uncomfortable.

JP 2001-90155 A JP 2003-247260 A

  The present invention has been made based on the recognition of such a problem, and an object of the present invention is to provide a sanitary washing apparatus capable of performing comfortable body washing while suppressing scattering of washing water.

1st invention is equipped with the nozzle which has a water discharge hole which spouts wash water from the diagonally backward lower side with respect to the user's body part seated on the toilet seat, The said nozzle is formed inside the said nozzle, and the said water discharge A first flow path that guides the cleaning water to the hole, a second flow path that is formed inside the nozzle and guides the cleaning water to the water discharge hole, and is connected to the downstream side of the second flow path, A swirl chamber that imparts a swirl component to the wash water and discharges the wash water in a conical shape from the water discharge hole, and a direction in which the wash water flows into the swirl chamber has a backward component The first flow path is eccentrically connected to the swirl chamber, the second flow path has a bent portion formed as a curved portion having a curved surface, and the water discharge hole is formed. An inner side wall of the bent portion connected to the swirl chamber in front of the position The swirl chamber is connected in a tangential direction to the inner peripheral wall of the swirl chamber, the swirl chamber has a cylindrical portion, and the washing water flows into the swirl chamber from the second flow path. The water inlet cross-sectional area of the water inlet is smaller than the radial cross-sectional area of the cylindrical portion, and the wash water that has flowed into the swirl chamber through the second flow path passes through the first flow path. Then, when the water swirls in a state having a larger swirling component than the washing water that has flowed into the swirl chamber, and passes through the first flow path, the water discharge so as to land in the first range of the body part. When spot water discharge is performed in which the cleaning water is ejected from the hole and the water is passed through the second flow path, the water is washed from the water discharge hole so that the water uniformly reaches the second range wider than the first range. run the wide water discharge of water is ejected, when passed through only to the second flow path, a conical from the jetting port It is a sanitary washing device, characterized by spouting the washing water.

According to this sanitary washing device, the washing water flows into the swirl chamber in the backward direction from the right side and the left side. At this time, the forward straight component of the cleaning water in which forward momentum is generated due to the flow of water from the base of the nozzle toward the tip side where the water discharge holes are formed decreases. Therefore, it can suppress that the washing water which flowed into the swirl chamber spouts forward from the water discharge hole without giving a swirl component. Accordingly, it is possible to prevent the washing water discharged from the water discharge holes from landing on the body local part and from splashing around the crotch through the crotch or being discharged to the user's thigh.
Moreover, according to this sanitary washing device, the washing water flows into the swirl chamber from the front to the rear from the position where the water discharge hole is formed. Therefore, the wash water flows into the swirl chamber in a state in which the forward straight component is sufficiently reduced. Therefore, it can suppress that the washing water which flowed into the swirl chamber spouts forward from the water discharge hole without giving a swirl component. Accordingly, it is possible to prevent the washing water discharged from the water discharge holes from landing on the body local part and from splashing around the crotch through the crotch or being discharged to the user's thigh.
Further, according to this sanitary washing device, the inner side wall of the bent portion is connected in a tangential direction with respect to the inner peripheral wall of the swirl chamber, so that the cleaning water flowing near the outer side wall of the bend portion is the central portion of the swirl chamber. Flow into. Here, the flow rate of the wash water flowing near the outer side wall is faster than the flow rate of the wash water flowing near the inner side wall. Therefore, the wash water flowing in the vicinity of the outer side wall flows into the central portion of the swirl chamber, so that the wash water having a faster flow velocity that has flowed into the swirl chamber is prevented from being directed to the water discharge hole without sufficiently imparting the swirl component. be able to.
In other words, since the inner side wall of the bent portion is connected in the tangential direction of the peripheral wall of the swirl chamber, the wash water that flows in the vicinity of the inner side wall and flows into the swirl chamber can swirl along the inner peripheral wall even if the flow rate is slower. . Therefore, it can suppress that the washing water which flowed into the swirl chamber heads to the water discharge hole without sufficiently imparting the swirl component.
Further, according to this sanitary washing device, the bent portion is formed as a curved portion having a curved surface, not a right-angle portion where the plane and the plane are connected at a right angle. Therefore, compared with the case where the bent portion is formed as a right angle portion, it is possible to suppress the pressure loss that occurs when the cleaning water passes through the bent portion. Thereby, the water discharge of the washing water which passed the flow path can be stabilized more.
Moreover, according to this sanitary washing apparatus, the water intake cross-sectional area of the flow path when the cleaning water flows into the swirl chamber is smaller than the radial cross-sectional area of the cylindrical portion. Therefore, the washing water that passes through the flow path flows not to the center of the swirl chamber but to the inner peripheral wall. Therefore, the wash water that has passed through the flow path is likely to swirl along the inner peripheral wall. Thereby, it can suppress that the wash water which flowed into the swirl | vortex chamber goes directly to a water discharge hole, and can fully provide a swirl component to wash water.
Further, according to this sanitary washing device, the user can focus on wide water discharge for quickly washing a wider range and a narrower range by switching between the first flow path and the second flow path. It is possible to switch between spot water discharge to be washed in accordance with preference.

  ADVANTAGE OF THE INVENTION According to the aspect of this invention, the sanitary washing apparatus which can suppress the scattering of washing water and can perform comfortable body washing is provided.

It is a perspective schematic diagram showing the toilet apparatus provided with the sanitary washing apparatus concerning embodiment of this invention. It is a cross-sectional schematic diagram which illustrates the state in which the user who sat on the toilet seat of this embodiment sat down. It is a block diagram showing the principal part structure of the sanitary washing apparatus concerning this embodiment. It is a perspective schematic diagram showing the nozzle of this embodiment. It is a cross-sectional schematic diagram showing the nozzle of this embodiment. It is a plane schematic diagram which illustrates the inflow direction to the swirl chamber of this embodiment. It is a schematic diagram for demonstrating scattering of washing water in the nozzle of a comparative example. It is a schematic diagram for demonstrating scattering of washing water in the nozzle of this embodiment. It is a cross-sectional schematic diagram for demonstrating wide water discharge. It is a cross-sectional schematic diagram for demonstrating spot water discharge. It is a cross-sectional schematic diagram showing the modification of the nozzle of this embodiment. It is a cross-sectional schematic diagram showing the other modification of the nozzle of this embodiment. It is a photograph showing an example of the water discharge form when washing water is spouted using the nozzle of a comparative example. It is a photograph showing an example of the form of water discharge when washing water is spouted using the nozzle of this embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic perspective view showing a toilet apparatus provided with a sanitary washing device according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view illustrating a state where a user sits on the toilet seat of this embodiment.
FIG. 2 is a schematic cross-sectional view taken along the section C-C shown in FIG.

  The toilet device shown in FIG. 1 includes a Western-style seat toilet (hereinafter simply referred to as “toilet” for convenience of explanation) 800 and a sanitary washing device 100 provided thereon. The sanitary washing device 100 includes a casing 400, a toilet seat 200, and a toilet lid 300. The toilet seat 200 and the toilet lid 300 are pivotally supported with respect to the casing 400 so as to be freely opened and closed.

  Inside the casing 400 is incorporated a body washing function unit that implements washing of a user who sits on the toilet seat 200 such as a “butt”. Further, for example, the casing 400 is provided with a seating detection sensor 404 that detects that the user has sat on the toilet seat 200. When the seating detection sensor 404 detects a user sitting on the toilet seat 200, when the user operates an operation unit such as a remote controller (not shown), the nozzle 410 can be advanced into the bowl 801 of the toilet 800. . The nozzle 410 advances obliquely downward with respect to a horizontal plane such as the upper surface of the toilet bowl 800 as indicated by an arrow A41 shown in FIG. In the sanitary washing device 100 shown in FIG. 1, the nozzle 410 has entered the bowl 801.

  One or a plurality of water discharge holes 411 are provided at the tip of the nozzle 410. And the nozzle 410 can wash out the "buttock" etc. of the user who sat on the toilet seat 200 by ejecting water from the water discharge hole 411 provided in the front-end | tip part. When the nozzle 410 ejects water, as shown in FIG. 2, the water discharge hole 411 is positioned obliquely rearward on the lower side with respect to the body part of the user 600 seated on the toilet seat 200. Therefore, the nozzle 410 ejects water from a water discharge hole 411 positioned obliquely rearward below the body part of the user 600 seated on the toilet seat 200, as indicated by an arrow A43 shown in FIG. Can be washed. For example, in the nozzle 410 illustrated in FIG. 1, one of the two water discharge holes 411 is a water discharge hole for bidet cleaning, and the other water discharge hole 411 is a water discharge hole for butt cleaning. . In the present specification, “water” includes not only cold water but also heated hot water.

  In this specification, it is a direction parallel to the axis of the nozzle 410 or the advance direction, and the front is “front” when viewed from the user sitting on the toilet seat 200, and is viewed from the user sitting on the toilet seat 200. The back is “back”. Further, in the horizontal direction perpendicular to the axis of the nozzle 410 or the advance direction, the right side is “right side” and the left side is “left side” when viewed from the user standing in front of the toilet 100.

FIG. 3 is a block diagram showing a main configuration of the sanitary washing device according to the present embodiment.
The sanitary washing device 100 according to this embodiment includes a main flow path 10 that guides water supplied from a water supply source (not shown) such as a water supply or a water storage tank. An electromagnetic valve 440 is provided on the upstream side of the main flow path 10. The electromagnetic valve 440 is an electromagnetic valve that can be opened and closed, and controls the supply of water to the heat exchanger 450 based on a command from a control unit (not shown) provided inside the casing 400.

  A heat exchanger 450 is provided on the downstream side of the electromagnetic valve 440. The heat exchanger 450 heats the supplied water to make predetermined hot water. The heat exchanger 450 may be, for example, an instantaneous heating type heat exchanger using a sheathed heater or the like, or a hot water storage type heat exchanger using a hot water storage tank.

  A nozzle 410 is provided on the downstream side of the heat exchanger 450. The nozzle 410 includes a flow rate adjustment valve 480 that adjusts the water flow (flow rate), a first flow path 427 that flows when spot water discharge, and a second flow path 428 that flows when wide water discharge. And a nozzle body 420. The flow rate adjustment valve 480 can adjust the water flow, and can open, close, and switch water supply to the nozzle 410. More specifically, the sanitary washing device 100 according to the present embodiment includes a spot water discharge in which the wash water is ejected from the water discharge hole 411 of the nozzle 410 so as to land on the first range of the local part of the body. The wide water discharge in which the washing water is ejected from the water discharge holes 411 of the nozzles 410 so that the water can uniformly land in the second range wider than the above range can be executed.

  The flow rate adjustment valve 480 can pass water to the first flow path 427 or flow to the second flow path 428 based on a command from a control unit (not shown) by a switch operation of the remote controller. Alternatively, the flow regulating valve 480 can pass water to the first flow path 427 and the second flow path 428 at a predetermined ratio. As a result, the user switches between the first flow path 427 and the second flow path 428, or the flow rate of the washing water passing through the first flow path 427 and the second flow path 428 are changed. By appropriately changing the ratio of the flow rate of the washing water that passes through, you can switch between wide water discharge that quickly cleans a wider area at once and spot water discharge that focuses on a narrower area according to your preference. be able to. This will be described in detail later.

  The nozzle 410 receives a driving force from a motor or the like, for example, and can advance or retreat into the bowl 801 of the toilet bowl 800. Then, the nozzle 410 can wash out the “buttock” of the user sitting on the toilet seat 200 by ejecting water from the water discharge hole 411 in a state where the nozzle 410 has advanced into the bowl 801.

FIG. 4 is a schematic perspective view showing the nozzle of the present embodiment.
FIG. 5 is a schematic sectional view showing the nozzle of this embodiment.
FIG. 6 is a schematic plan view illustrating the direction of water entering the swirl chamber of this embodiment.
5 is a schematic cross-sectional view taken along a cutting plane AA shown in FIG.

  The nozzle 410 of this embodiment has a nozzle body 420. Inside the nozzle body 420 are first and second flow paths 427 and 428 through which wash water supplied from a water source (not shown) passes, a swirl chamber 423 that imparts a swirl component to the wash water, and a swirl chamber 423. And a communication passage 425 that guides the cleaning water to the water discharge hole 411. In addition, a projecting portion 424 that generates a swirling flow with a more stable swirl force is provided at the center of the swirl chamber 423.

  The swirl chamber 423 is formed in a cylindrical shape and has a large-diameter inner peripheral wall 423e (see FIGS. 7 and 8) having a larger diameter at the bottom, and an inclined inner peripheral wall 423f (see FIG. 7) having a diameter contracted toward the communication path 425. And (see FIG. 8). The inclined inner peripheral wall 423f is connected to the communication path 425 at one end thereof.

  As shown in FIG. 5, the first flow path 427 is eccentrically connected to the swirl chamber 423. Specifically, there is a shortest distance D1 between the center line of the first flow path 427 and the center axis 423a of the swirl chamber 423. On the other hand, the second channel 428 is eccentrically connected to the swirl chamber 423 in the same manner as the first channel 427. Specifically, there is a shortest distance D2 between the center line of the second flow path 428 and the center axis 423a of the swirl chamber 423. A first connection portion 427b that is a connection portion between the center line of the first flow path 427 and the swirl chamber 423, and a second connection that is a connection portion between the center line of the second flow path 428 and the swirl chamber 423. The portion 428 b is provided at a substantially symmetrical position when viewed from the central axis 423 a of the swirl chamber 423. Further, the shortest distance D2 between the center line of the second flow path 428 and the central axis 423a of the swirl chamber 423 is shorter than the shortest distance D1 between the center line of the first flow path 427 and the central axis 423a of the swirl chamber 423. long.

  The second flow path 428 includes a rectilinear portion 428 c formed substantially in parallel with the advance direction of the nozzle 410 and a bent portion 428 d formed by bending with respect to the advance direction of the nozzle 410. In other words, the bent portion 428d is bent as viewed from the rectilinear portion 428c, and is formed as a curved portion having a curved surface, not a right-angle portion where the plane and the plane are connected at a right angle. Therefore, compared with the case where the bent portion 428d is formed as a right angle portion, it is possible to suppress the pressure loss that occurs when the cleaning water passes through the bent portion 428d. Thereby, the water discharge (wide water discharge) of the wash water that has passed through the second flow path 428 can be further stabilized.

  The downstream side of the bent portion 428d is connected to the swirl chamber 423. Therefore, the traveling direction of the cleaning water that passes through the rectilinear portion 428 c and the bent portion 428 d and flows into the swirl chamber 423 is changed from the advancing direction of the nozzle 410. Therefore, when the washing water passes through the bent portion 428d, the straight traveling component in the forward direction is reduced. Then, as shown in FIG. 5, the washing water flows into the swirl chamber 423 in the rearward direction rather than in the left-right direction.

  The direction in which the cleaning water flows into the swirl chamber 423 (incoming water direction) is not limited to the incoming water direction shown in FIG. The direction of entering the swirl chamber 423 is a direction having a backward component, that is, a direction in which the backward component is greater than zero.

  For example, the arrow A11 (right side) and the arrow A27 (left side) shown in FIG. 6 are directions in which the backward component is zero. On the other hand, for example, arrows A13, A15, A17, A19, A21, A23, and A25 are all directions in which the backward component is larger than zero. That is, the arrows A13, A15, A17, A19, A21, A23, and A25 are more backward than the right side (the direction of the arrow A11) and the left side (the direction of the arrow A27). In other words, the direction of water entering the swirl chamber 423 is the direction from the right side (the direction of the arrow A11) to the left side (the direction of the arrow A27) when viewed counterclockwise. In the present invention, the direction of water entering the swirl chamber 423 can be the direction of these arrows A13, A15, A17, A19, A21, A23, A25, and the like.

  In addition, although FIG. 6 illustrated the case where wash water flows so that a counterclockwise swirl | vortex flow may be formed toward the swirl | vortex chamber 423, this invention is not limited to this. On the contrary, the washing water may flow so that a clockwise swirling flow is formed in the swirling chamber 423. Also in this case, the direction in which the cleaning water flows is from the left side (the direction opposite to the arrow A11) to the right side (the direction opposite to the arrow A27) when viewed clockwise.

  6 is the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423, but the incoming water direction to the swirl chamber 423 is limited to the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423. It is not done.

  As shown in FIG. 5, the second flow path 428 is connected to the swirl chamber 423 on the front side of the position where the water discharge hole 411 is formed. The inner side wall 428e of the bent portion 428d is connected to the large-diameter inner peripheral wall 423e of the turning chamber 423 at an angle smaller than the outer side wall 428f of the bent portion 428d. In the present embodiment, the second flow path 428 is connected in the tangential direction of the large-diameter portion inner peripheral wall 423e of the swirl chamber 423. That is, the inner side wall 428e of the second flow path 428 is connected to the tangential direction of the large-diameter portion inner peripheral wall 423e of the swirl chamber 423.

  Therefore, the wash water that has flowed into the swirl chamber 423 through the second flow path 428 swirls along the large-diameter inner peripheral wall 423e as shown by an arrow A2 in FIG. Alternatively, even if the second flow path 428 is not connected in the tangential direction of the large-diameter portion inner peripheral wall 423e of the swirl chamber 423, the shortest distance D2 is longer than the shortest distance D1, and thus passes through the second flow path 428. The washing water that has flowed into the swirl chamber 423 swirls in a state having a larger swirl component (or swirl force) than the wash water that has passed through the first flow path 427 and has flowed into the swirl chamber 423.

  At this time, the flow rate of the wash water flowing near the outer side wall 428f is faster than the flow rate of the wash water flowing near the inner side wall 428e. Therefore, even if the cleaning water flowing in the vicinity of the outer side wall 428f flows into the central portion of the swirl chamber 423, the wash water that has flowed into the swirl chamber 423 can be prevented from being directed to the water discharge hole 411 without being imparted with the swirl component. . In other words, since the inner side wall 428e of the second flow path 428 is connected to the tangential direction of the large-diameter portion inner peripheral wall 423e of the swirl chamber 423, the wash water flowing in the vicinity of the inner side wall 428e and flowing into the swirl chamber 423 is Even if the flow rate is slower, it can be swung along the inner peripheral wall 423e of the large diameter portion. Therefore, it can suppress that the washing water which flowed into swirl chamber 423 heads for water discharge hole 411, without giving a swirl component.

  As shown in FIG. 4, the water intake cross-sectional area S1 of the water inlet through which the cleaning water flows from the flow path 428 into the swirl chamber 423 is a radial cross-sectional area of the cylindrical portion of the swirl chamber 423 (parallel to the central axis 423a). Half of the cross-sectional area of the cylindrical part in the direction) is smaller than S2. Therefore, the wash water that has passed through the second flow path 428 flows not toward the center of the swirl chamber 423 but toward the outside. That is, the cleaning water flows into the swirl chamber 423 closer to the inner peripheral wall 423e. Thereby, it is possible to prevent the washing water flowing into the swirl chamber 423 from going directly to the water discharge hole 411, and to sufficiently swirl the washing water by swirling the washing water. Then, the wash water swirled in the swirl chamber 423 passes through the communication passage 425 while maintaining the swirl component, and is ejected from the water discharge hole 411.

  On the other hand, the wash water flowing into the swirl chamber 423 through the first flow path 427 swirls in the swirl chamber 423 as indicated by an arrow A1 shown in FIG. At this time, the first flow path 427 is not connected in the tangential direction of the large-diameter portion inner peripheral wall 423e of the swirl chamber 423. Therefore, the wash water that has flowed into the swirl chamber 423 through the first flow path 427 does not swirl along the large-diameter inner peripheral wall 423e. The shortest distance D1 is shorter than the shortest distance D2. Therefore, the wash water that has flowed into the swirl chamber 423 through the first flow path 427 has a smaller swirl component than the wash water that has flowed into the swirl chamber 423 through the second flow path 428. Turn. Then, the cleaning water swirled in the swirl chamber 423 passes through the communication passage 425 in a state where the swirling component is reduced as compared with the wash water that has flowed into the swirl chamber 423 through the second flow path 428, and the water discharge hole 411. Erupts from.

  According to the present embodiment, the direction in which the cleaning water flows into the swirl chamber 423 is a rearward direction from the right side and the left side. That is, the washing water flows into the swirl chamber 423 more backward than the right side and the left side. Further, when the washing water passes through the bent portion 428d, the straight traveling component in the forward direction is reduced. Therefore, it is possible to suppress the cleaning water flowing into the swirl chamber 423 from being ejected forward from the water discharge hole 411 without imparting the swirl component. Thereby, it is possible to prevent the washing water discharged from the water discharge hole 411 from landing on the body local part, and from splashing around the crotch through the crotch or being discharged to the user's thigh.

Next, the effect | action and effect which suppress scattering of washing water are further demonstrated, referring drawings.
FIG. 7 is a schematic view for explaining scattering of cleaning water in the nozzle of the comparative example.
FIG. 8 is a schematic diagram for explaining the splashing of cleaning water in the nozzle of the present embodiment.
7A and FIG. 8A correspond to cross-sectional schematic views taken along the cutting plane BB shown in FIG. FIG. 7B and FIG. 8B are schematic views illustrating results obtained by simulation of the flow lines of cleaning water that pass through the second flow path 428 and are ejected from the water discharge holes 411.

  In the nozzle 410a of the comparative example shown in FIG. 7A, the direction in which the cleaning water flows into the swirl chamber 423 is the right side and the arrow A5 shown in FIG. 7A and FIG. 7B. It is more forward than the left side. That is, the washing water flows into the swirl chamber 423 in the forward direction from the right side and the left side. Therefore, the traveling direction of the cleaning water flowing into the swirl chamber 423 is hardly changed from the advance direction of the nozzle 410a. Therefore, the wash water flows into the swirl chamber 423 with almost no forward straight component being reduced.

  According to this comparative example, a part of the washing water that has flowed into the swirl chamber 423 does not have a sufficient swirl component as indicated by the arrow A6 shown in FIG. Alternatively, there is a risk of jumping out in the direction of entering the swirl chamber 423 or in the advancing direction of the nozzle 410. Further, for example, like the flow lines L1 and L2 shown in FIG. 7B, a part of the washing water flowing into the swirl chamber 423 is not sufficiently imparted with the swirl component, and the second connection portion 428b (FIG. See 5). If it does so, the straight-ahead component of the forward direction of washing water will be maintained. Or the momentum to the front of washing water becomes strong. As a result, the wash water discharged from the water discharge hole 411 may not land on the body part and may escape from between the crotch and scatter to the surroundings or may be discharged to the user's thigh.

  On the other hand, in the nozzle 410 of the present embodiment, the direction in which the cleaning water flows into the swirl chamber 423 is the right side and the left side as indicated by the arrow A7 shown in FIGS. 8A and 8B. Than backwards. That is, the washing water flows into the swirl chamber 423 more backward than the right side and the left side. Therefore, the traveling direction of the washing water flowing into the swirl chamber 423 is changed from the advance direction of the nozzle 410a. Therefore, the washing water is reduced in the forward straight component.

  According to this embodiment, the wash water that has flowed into the swirl chamber 423 is sufficiently imparted with a swirl component and swirls within the swirl chamber 423. Further, as indicated by the streamline shown in FIG. 8B, the washing water that has flowed into the swirl chamber 423 is uniformly ejected from the water discharge holes 411 without being collected in a predetermined range. If it does so, it can suppress that the straight-ahead component of the forward direction of washing water is maintained. Or it can suppress that the momentum to the front of washing water becomes strong. Therefore, it is possible to suppress the cleaning water flowing into the swirl chamber 423 from being ejected forward from the water discharge hole 411 without imparting the swirl component. Thereby, it is possible to prevent the washing water discharged from the water discharge hole 411 from landing on the body local part, and from splashing around the crotch through the crotch or being discharged to the user's thigh.

  Note that part of the cleaning water that has flowed into the swirl chamber 423 may scatter backward as indicated by an arrow A8 in FIG. On the other hand, the nozzle 410 advances obliquely downward with respect to the horizontal plane, and when the washing water is spouted, the water discharge hole 411 is positioned obliquely rearward on the lower side with respect to the body part. The effect of splashing in the direction is less. That is, the distance until the wash water sprayed backward from the water discharge hole 411 reaches the body such as the buttocks is shorter than the distance until the wash water sprayed forward from the water discharge hole 411 reaches the body. Therefore, there is little possibility that the washing water ejected rearward from the water discharge hole 411 is scattered around or discharged to the user's thigh. Further, since the washing water is ejected in the rearward direction, there is little possibility that the washing water comes out between the crotch.

Next, the water discharge form of wide water discharge and spot water discharge will be described with reference to the drawings.
FIG. 9 is a schematic cross-sectional view for explaining wide water discharge.
FIG. 9 is a schematic cross-sectional view taken along the cutting plane BB shown in FIG.

  When the wide water discharge is executed, the wash water supplied from a water source (not shown) passes through the second flow path 428 and is supplied to the nozzle 410 and flows into the swirl chamber 423. In the present embodiment, the second flow path 428 is connected in the tangential direction of the large-diameter portion inner peripheral wall 423e of the swirl chamber 423. Therefore, the wash water that has flowed into the swirl chamber 423 swirls along the large diameter inner peripheral wall 423e and the inclined inner peripheral wall 423f as indicated by an arrow A3 shown in FIG. Then, the wash water swirled in the swirl chamber 423 passes through the communication path 425 while maintaining the swirl component. At this time, since the washing water has a larger swirl component, as shown in FIG. Therefore, the substantial area of the cleaning water that passes through the communication path 425 is reduced, and the flow rate of the cleaning water is increased. Then, the cleaning water 500 whose flow velocity is increased is ejected from the water discharge hole 411.

  At this time, since the washing water ejected from the nozzle body 420 maintains the swirl component, it is ejected in a hollow conical shape as a liquid film having a hollow portion at the center. Hereinafter, for convenience of explanation, the washing water ejected in the hollow conical shape is referred to as “hollow conical water discharge”.

  In the hollow portion of the hollow conical water discharge 510, the amount of air discharged from the hollow portion of the hollow conical water discharge 510 to the outside increases following the flow of the liquid film. On the other hand, since the passage of air entering the hollow portion of the hollow conical water discharge 510 is blocked by the liquid film of the hollow conical water discharge 510, the air is discharged from the hollow portion of the hollow conical water discharge 510 to the center of the air. It will be limited. Therefore, the amount of air entering the hollow portion of the hollow conical water discharge 510 is reduced, and a negative pressure state in which the pressure is lower than the outside air is generated in the hollow portion of the hollow conical water discharge 510.

  In addition, in the wide water discharge, the water flow granulated to fill the hollow portion of the hollow conical water discharge 510 before the hollow conical water discharge 510 reaches the local part of the body (hereinafter referred to as “granulation” for convenience of explanation). Water stream ") is generated. A part of the granulated water flow 520 traveling in the traveling direction of the liquid film is drawn into the hollow portion by the negative pressure generated in the hollow portion of the hollow conical water discharge 510. Thereby, the hollow part of the hollow conical water discharge 510 can be filled with the granulated water flow 520.

  That is, the washing water 500 ejected from the nozzle 410 is first discharged from the water discharge hole 411 as a hollow conical water discharge 510 and filled in the hollow portion by the granulated water flow 520 in the body part of the user sitting on the toilet seat 200. Land on a wider area. At this time, the hollow conical water discharge 510 may land on the body local part in a state where the liquid film is crushed and granulated, or may land on the body local part in the state of the liquid film.

  According to this, for example, during menstruation during menstruation, menstrual blood stains may adhere over a wide area around the female local area, but wide water discharge responds to the desire to clean the wide area at once. Can do. In addition, since the granulated water flow 520 filled with the hollow portion of the hollow conical water discharge 510 lands near the center of the cleaning area, the cleaning pressure in the central portion of the cleaning area is higher than that when the conventional straight flow lands. It is also low, and there is little possibility that strong stimulation will be applied to the delicate area of women located near the center of the women's local area. Therefore, wide water discharge can realize a bidet cleaning with a very comfortable cleaning feeling.

FIG. 10 is a schematic cross-sectional view for explaining spot water discharge.
FIG. 10 is a schematic cross-sectional view taken along the cutting plane BB shown in FIG.

  When performing spot water discharge, wash water supplied from a water source (not shown) passes through the first flow path 427 and is supplied to the nozzle 410 and flows into the swirl chamber 423. As described above with reference to FIGS. 4 to 6, the shortest distance D1 is shorter than the shortest distance D2. Therefore, the cleaning water that has flowed into the swirl chamber 423 through the first flow path 427 has passed through the second flow path 428 and flowed into the swirl chamber 423 as indicated by an arrow A4 in FIG. It turns in the state which has a turning component smaller than water. Then, the wash water swirled in the swirl chamber 423 passes through the communication passage 425 in a state where the swirl component is reduced as compared with the wash water that has flowed into the swirl chamber 423 through the second flow path 428. At this time, since the swirl component of the washing water is reduced, as shown in FIG. 9, no contraction occurs in the communication path 425. Therefore, the flow rate of the wash water is slower than the flow rate of the wash water that passes through the communication path 425 during wide water discharge. Then, the washing water that has passed through the communication passage 425 is ejected from the water discharge hole 411 as a straight flow 530.

  A part of the straight flow 530 ejected from the water discharge hole 411 is separated from the straight flow 530 into droplets 540. Then, the washing water ejected from the nozzle body 420 lands on a local part of the body in a state where the straight flow 530 and the droplet 540 are mixed.

  The wash water ejected from the water discharge hole 411 at the time of spot water discharge does not diffuse like the wash water ejected from the water discharge hole 411 at the time of wide water discharge, and does not spout as the hollow conical water discharge 510. That is, the wash water ejected from the water discharge hole 411 at the time of spot water discharge is not a hollow state but a solid state or a filled state.

  Thus, according to the spot water discharge of this embodiment, the range narrower than the case of wide water discharge can be wash | cleaned. That is, the spot water discharge landing range (first range) is narrower than the wide water discharge landing range (second range). In other words, the wide water discharge landing range (second range) is wider than the spot water discharge landing range (first range). The user can focus on the portion to be cleaned according to his / her preference.

  Further, when spot water is discharged, no contraction occurs in the communication path 425, so that the straight path 530 and the droplet 540 cause the communication path 425 to be almost full. Therefore, as described above, the wash water ejected from the water discharge hole 411 at the time of spot water discharge is in a solid state or a filled state. On the other hand, as described above with reference to FIG. 9, the wash water ejected from the water discharge hole 411 during the wide water discharge is a liquid film having a hollow portion at the center, that is, a hollow conical water discharge 510. Thereby, for example, in bidet cleaning, the flow rate of the wash water that reaches the female local part during spot water discharge is smaller than the flow rate of the wash water that reaches the female local part during wide water discharge.

  Therefore, according to the spot water discharge of the present embodiment, it is possible to wash a narrower range than in the case of wide water discharge, and that a strong stimulation is added to the delicate area of the woman located near the center of the female local area more than necessary. Can be suppressed. Therefore, a bidet cleaning with a very comfortable cleaning feeling can be realized.

Next, a modified example of the nozzle of the present embodiment will be described with reference to the drawings.
FIG. 11 is a schematic cross-sectional view illustrating a modified example of the nozzle of the present embodiment.
FIG. 12 is a schematic cross-sectional view showing another modification of the nozzle of this embodiment.
11 and 12 correspond to cross-sectional schematic views taken along the section AA shown in FIG.

  In the nozzle 410b shown in FIG. 11, the second flow path 428 has a rectilinear portion 428c and a bent portion 428d, like the nozzle 410 described above with reference to FIG. The bent portion 428d is bent as viewed from the straight portion 428c, and is formed as a curved portion having a curved surface, not a right-angle portion where the plane and the plane are connected at a right angle. In the nozzle 410b shown in FIG. 11, the outer side wall 428f of the bent portion 428d is connected to the large-diameter inner peripheral wall 423e of the swirl chamber 423 at an angle smaller than the inner side wall 428e of the bent portion 428d. Specifically, the outer side wall 428f of the second channel 428 is connected in the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423. Other structures are similar to the structure of the nozzle 410 described above with reference to FIGS.

  According to this modification, the channel length of the bent portion 428d shown in FIG. 11 is longer than the channel length of the bent portion 428d described above with reference to FIG. For this reason, the so-called run-up distance for increasing the momentum of the washing water can be increased. As a result, the washing water that has flowed into the swirl chamber 423 is swirled in the swirl chamber 423 with a sufficient swirl component. Therefore, it is possible to further suppress the cleaning water flowing into the swirl chamber 423 from being ejected forward from the water discharge hole 411 without imparting the swirl component.

  In the nozzle 410c shown in FIG. 12, the bent portion 428d has a curved surface that is smoother than the bent portion 428d shown in FIG. Other structures are the same as the structure of the nozzle 410b shown in FIG. Therefore, compared with the nozzle 410b shown in FIG. 11, the backward force of the cleaning water can be increased. Further, as compared with the nozzle 410b shown in FIG. 11, the pressure loss that occurs when the cleaning water passes through the bent portion 428d can be further suppressed. As a result, the washing water that has flowed into the swirl chamber 423 is swirled in the swirl chamber 423 with the swirl component more sufficiently applied. Therefore, it can further suppress that the washing water which flowed into swirl chamber 423 spouts forward from water discharge hole 411, without giving a swirl component.

Next, an example of the results of experiments conducted by the present inventor will be described with reference to the drawings.
FIG. 13 is a photograph showing an example of the form of water discharge when cleaning water is ejected using the nozzle of the comparative example.
Moreover, FIG. 14 is a photograph showing an example of the water discharge form when washing water is spouted using the nozzle of this embodiment.

  In the case of the photograph shown in FIG. 13, the direction in which the cleaning water flows into the swirl chamber 423 is forward with respect to the right side and the left side as described above with reference to FIG. 7. That is, the wash water flows into the swirl chamber 423 in the forward direction from the right side and the left side. In this case, as can be seen from the photograph shown in FIG. 13, the liquid film on the front side in the wash water ejected from the water discharge hole 411 is crushed and granulated earlier than the liquid film on the rear side. A part of the washing water, which is crushed and granulated from the liquid film on the front side, scatters forward like grains in the ranges C1 and C2 shown in FIG. As a result, the wash water discharged from the water discharge hole 411 may not land on the body part and may escape from between the crotch and scatter to the surroundings or may be discharged to the user's thigh.

  On the other hand, in the case of the photograph shown in FIG. 14, the direction in which the cleaning water flows into the swirl chamber 423 is rearward from the right side and the left side as described above with reference to FIG. 8. That is, the wash water flows into the swirl chamber 423 more rearward than on the right and left sides. In this case, as can be seen from the range C3 shown in FIG. 14, the liquid film on the front side in the wash water ejected from the water discharge hole 411 is crushed and granulated later than the liquid film on the rear side. That is, the distance from the water discharge hole 411 to the position where the liquid film is crushed is longer on the front side than the rear side in the wash water ejected from the water discharge hole 411. Thereby, it is possible to prevent the washing water discharged from the water discharge hole 411 from landing on the body local part, and from splashing around the crotch through the crotch or being discharged to the user's thigh.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, dimensions, material, arrangement, etc. of the elements included in the nozzle 410 and the like and the installation forms of the first and second flow paths 427, 428 are not limited to those illustrated, but may be changed as appropriate. Can do.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  DESCRIPTION OF SYMBOLS 10 Main flow path, 100 Sanitary washing apparatus, 200 Toilet seat, 300 Toilet lid, 400 Casing, 404 Seating detection sensor, 410, 410a, 410b, 410c Nozzle, 411 Water discharge hole, 420 Nozzle body, 423 Swirling chamber, 423a Central axis, 423e Large-diameter portion inner peripheral wall, 423f inclined inner peripheral wall, 424 projecting portion, 425 communication path, 427 first flow path, 427b first connection portion, 428 second flow path, 428b second connection portion, 428c straight advance portion 428d bent portion, 428e inner side wall, 428f outer side wall, 440 solenoid valve, 450 heat exchanger, 480 flow rate regulating valve, 500 washing water, 510 hollow conical water discharge, 520 granulated water flow, 530 straight flow, 540 droplet, 800 toilet bowls, 801 bowls

Claims (1)

A nozzle having a water discharge hole for ejecting washing water from a lower oblique rear side with respect to a body part of a user seated on a toilet seat,
The nozzle is
A first flow path formed inside the nozzle and guiding the wash water to the water discharge hole;
A second flow path that is formed inside the nozzle and guides the washing water to the water discharge hole;
A swirl chamber connected to the downstream side of the second flow path, imparting a swirl component to the wash water, and discharging the wash water in a conical shape from the water discharge hole;
Have
The direction in which the washing water flows into the swirl chamber is a direction having a backward component,
The first flow path is eccentrically connected to the swirl chamber;
The second flow path has a bent portion formed as a curved portion having a curved surface, and is connected to the swirl chamber in front of the position where the water discharge hole is formed,
The inner side wall of the bent portion is connected tangentially to the inner peripheral wall of the swirl chamber,
The swirl chamber has a portion formed in a cylindrical shape,
The water inlet cross-sectional area of the water inlet through which the washing water flows from the second flow path into the swirl chamber is smaller than the radial cross-sectional area of the cylindrical portion,
Wash water that has flowed into the swirl chamber through the second flow path swirls in a state having a larger swirl component than the wash water that has flowed into the swirl chamber through the first flow path. ,
When water is passed through the first flow path, spot water discharge is performed in which washing water is ejected from the water discharge holes so as to land in the first range of the body local area, and water is passed through the second flow path. , Executing wide water discharge in which wash water is jetted from the water discharge holes so as to uniformly land in a second range wider than the first range, and passing only to the second flow path, A sanitary washing apparatus, wherein the washing water is discharged in a conical shape from a water discharge hole.