Hygienic cleaning device

Abstract

An object is to provide a sanitary washing device. A nozzle of the sanitary washing device includes a first cylindrical portion, a second cylindrical portion, and a cap portion. The second cylindrical portion has an inflow hole and an air supply hole that communicate with a gap between the first cylindrical portion and the second cylindrical portion. The first cylindrical portion has the inflow hole, a cross-sectional area of which is smaller than a cross-sectional area of an upper internal space above the inflow hole and smaller than a cross-sectional area of a passage hole of the cap portion. The cross-sectional area of the passage hole of the cap portion increases upward. The sanitary washing device changes a flow rate ratio of inflow to the inflow hole and switches a water flow between a first state in which, after a continuous water flow is discharged from the passage hole after passing through the through hole in a state in which there is a gap between the continuous water flow and an inner peripheral surface of the passage hole, the continuous water flow becomes an intermittent water flow in the space and a second state in which the continuous water flow including bubbles mixed therein and diffused to the inner peripheral surface is discharged.

Description

Technical Field

[0001] This disclosure relates to a hygienic cleaning device for cleaning specific areas of a seated person's body. Background Technology

[0002] In hygienic cleaning devices for cleaning localized areas of a seated human body, it is known that even intermittent spraying of warm water in a relatively small volume can provide a so-called "cleaning sensation," which is a feeling of being well cleaned, compared to continuously spraying warm water onto a localized area of ​​the body.

[0003] Patent document 1 (JP2024-50194 A) describes a hygienic cleaning device that can selectively discharge intermittent water streams and continuous water streams including air bubbles mixed therein from a nozzle without using a pump. Summary of the Invention

[0004] The problem the invention aims to solve

[0005] In the sanitary cleaning apparatus described in Patent Document 1, the pulsation of the water flow is stabilized when an intermittent water flow is generated. However, in the sanitary cleaning apparatus, when a continuous water flow including air bubbles mixed therein is generated, the water flow also pulsates, and the continuous water flow may therefore become an intermittent water flow, making it difficult to generate a continuous water flow including air bubbles mixed therein.

[0006] In view of the foregoing, the object of this disclosure is to provide a hygienic cleaning apparatus configured to selectively and stably generate intermittent water flow and a continuous water flow including air bubbles mixed therein without the use of a pump.

[0007] Solution for solving the problem

[0008] One aspect of this hygienic cleaning device includes a nozzle configured to discharge water toward a localized area of ​​a seated person's body. The nozzle includes a first cylindrical portion, a second cylindrical portion, and a cover. The first cylindrical portion has a central axis extending in one direction. The second cylindrical portion has a central axis coinciding with the central axis of the first cylindrical portion and surrounding the outer peripheral surface of the first cylindrical portion. The cover closes an upper end, which is one end of the second cylindrical portion in one direction. The first cylindrical portion has a portion in one direction in which a first inflow hole is formed, the first inflow hole being formed as a through hole penetrating the portion in that direction. The cover has a channel hole, which is formed as a through hole penetrating the cover in one direction. A first gap is provided between the outer peripheral surface of the first cylindrical portion and the inner peripheral surface of the second cylindrical portion. The first gap has a lower end, which is the other end in one direction and is closed. A second gap communicating with the first gap is provided between the first cylindrical portion and the cover. The first cylindrical portion faces the cover. The second cylindrical portion has a second inlet hole formed as a through hole and an air supply hole formed as a through hole, which communicate with a first gap. The cross-sectional area of ​​the first inlet hole is smaller than the cross-sectional area of ​​the internal space of the upper portion of the first cylindrical portion, which is located at the upper portion of the first cylindrical portion and above the first inlet hole. The cross-sectional area of ​​the first inlet hole is smaller than the cross-sectional area of ​​the channel hole. The cross-sectional area of ​​the channel hole increases upward. The central axis of the first inlet hole and the central axis of the channel hole are on the same straight line. The first cylindrical portion has an upper end located above the second inlet hole. The sanitary cleaning device is configured to change the flow rate ratio of a first flow rate to a second flow rate during operation to switch the water flow between at least two states, including a first state and a second state. Here, the first flow rate is the flow rate of water flowing into the first inlet hole. The second flow rate is the flow rate of water flowing into the second inlet hole. In the first state, the continuous water flow passing through the channel hole is discharged from the channel hole when there is a gap between the continuous water flow and the inner circumferential surface of the channel hole, and the continuous water flow then becomes an intermittent water flow in the space. In the second state, a continuous flow of water, including the air bubbles mixed therein and diffused to the inner circumferential surface of the channel hole, is discharged from the channel hole.

[0009] Advantages of the invention

[0010] The sanitary cleaning apparatus according to embodiments of the present disclosure enables the stable and selective generation of intermittent water flows and continuous water flows including air bubbles mixed therein without the use of a pump. Attached Figure Description

[0011] Figure 1 This is a perspective view of a sanitary cleaning device attached to a toilet according to the first embodiment;

[0012] Figure 2 It is a circuit diagram of the water circuit included in the sanitary cleaning apparatus according to the first embodiment;

[0013] Figure 3 This is an external perspective view of the nozzle according to the first embodiment;

[0014] Figure 4 It is along Figure 3 A cross-sectional view of the nozzle taken by line AA;

[0015] Figure 5 yes Figure 4 An enlarged view of the main part of the nozzle shown;

[0016] Figure 6 This is a cross-sectional view of Action 1, which represents the situation where water is discharged from the nozzle in the first state.

[0017] Figure 7 This is a cross-sectional view of action 2, which is the situation where water is discharged from the nozzle in the first state.

[0018] Figure 8 This is a cross-sectional view of action 3, which represents the situation where water is discharged from the nozzle in the first state.

[0019] Figure 9 This is a cross-sectional view of action 4, which is the situation where water is discharged from the nozzle in the first state.

[0020] Figure 10 This is a cross-sectional view of action 5, which is the situation where water is discharged from the nozzle in the first state.

[0021] Figure 11 This is a cross-sectional view of action 6, which represents the water flow being discharged from the nozzle in the first state.

[0022] Figure 12 This is a view of the state of the water flow in the space after the water is discharged from the nozzle (view 1).

[0023] Figure 13 This is a view of the state of the water flow in the space after the water is discharged from the nozzle (view 2).

[0024] Figure 14 This is a view of the state of the water flow in the space after the water flow in the second state is discharged from the nozzle;

[0025] Figure 15 This is a cross-sectional view of Action 1, which is the second state in which water is discharged from the nozzle;

[0026] Figure 16 This is a cross-sectional view of action 2, which is the situation where water is discharged from the nozzle in the second state.

[0027] Figure 17This is a cross-sectional view of action 3, which is the situation where water is discharged from the nozzle in the second state;

[0028] Figure 18 This is a cross-sectional view of action 4, which shows the water flow being discharged from the nozzle in the second state.

[0029] Figure 19 This is a cross-sectional view of action 5, which shows the water flow being discharged from the nozzle in the second state.

[0030] Figure 20 This is a cross-sectional view of action 6, which shows the water flow being discharged from the nozzle in the second state.

[0031] Figure 21 It is a cross-sectional view of water flowing out of the nozzle in the third state; and

[0032] Figure 22 This is a cross-sectional view of the water flow exiting the nozzle in the fourth state. Detailed Implementation

[0033] Embodiments of the sanitary cleaning apparatus 1, nozzle 2, and water flow generation method according to the present disclosure will now be described with reference to the accompanying drawings. The embodiments described below are examples illustrating the present disclosure; however, the embodiments described below are not intended to limit the present disclosure. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, mathematical formulas, corresponding contents and corresponding orders of steps in the method shown in the following embodiments are merely examples. The present disclosure may include content not described below. Furthermore, in the following description, geometric expressions such as parallel and orthogonal may be used, and these expressions do not indicate mathematical precision but include substantially acceptable errors, offsets, etc. Furthermore, expressions such as simultaneous and identical also include substantially acceptable ranges.

[0034] Furthermore, the accompanying drawings are schematic diagrams that have been appropriately emphasized, omitted, or scaled to illustrate this disclosure, and do not show actual shapes, positional relationships, or ratios.

[0035] Furthermore, several inventions may be broadly described below as one embodiment. Additionally, some of the contents described below are to be interpreted as optional components relating to this disclosure.

[0036] (First Implementation)

[0037] Figure 1 This is a perspective view of the sanitary cleaning device 1 attached to the toilet 3. Figure 2This is a circuit diagram of the water circuit 4 included in the sanitary cleaning device 1. The sanitary cleaning device 1 is attached to the toilet 3. The sanitary cleaning device 1 is a device that discharges water generated by the heating device 45 from the nozzle 2 to a localized area of ​​a person sitting on the seat 30. The sanitary cleaning device 1 includes a seat 30 that can be opened / closed relative to the toilet 3. The nozzle 2 is disposed at the end of the nozzle body 20. The nozzle 2 can appear and disappear together with the nozzle body 20. The sanitary cleaning device 1 may be provided with a toilet lid that can be opened / closed relative to the toilet 3. In this specification and claims, "water" includes warm water.

[0038] Although the water circuit 4 included in the sanitary cleaning device 1 is constructed as described below, it is not limited to a specific construction. The water circuit 4 includes, from upstream to downstream, a water supply connection port 40, a filter 41, a water-stop solenoid valve 42, a pressure reducing valve 43, a vacuum circuit breaker 44, a heating device 45, a flow control valve 46, and a switching device 47.

[0039] The water supply connection port 40 is a component that connects to a water pipe via, for example, an adapter. The water supply connection port 40 includes a filter 41 integrally integrated inside it. The filter 41 prevents debris contained in the tap water from flowing in.

[0040] The water-stop solenoid valve 42 is controlled by the control device 31 (see...) Figure 1 The valve is opened and closed under the control of the nozzle 2, thereby stopping the flow of water from the water pipe. Opening the stop valve 42 allows water to be discharged from the nozzle 2, and closing the stop valve 42 stops the discharge of water from the nozzle 2.

[0041] Pressure reducing valve 43 is a valve that reduces the water pressure supplied from the water pipe, so that the water pressure remains constant after passing through pressure reducing valve 43.

[0042] For example, when the water pipe connected to the water supply connection port 40 has negative pressure due to, for example, a water outage, the vacuum circuit breaker 44 prevents water inside the water circuit 4 from flowing back into the water pipe. The vacuum circuit breaker 44 is connected to the ventilation pipe 48. The ventilation pipe 48 extends to the toilet bowl 32 of the toilet 3 (see...). Figure 1 Ventilation duct 48 is the supply path for external air to be supplied to vacuum circuit breaker 44 when it is in operation. Furthermore, ventilation duct 48 functions as a water release path, releasing water into toilet 3 during operation of vacuum circuit breaker 44.

[0043] Heating device 45 is a device for heating tap water supplied from a water pipe to produce warm water. Although heating device 45 is a heat exchanger for instantly heating tap water supplied from a water pipe, it is not limited to a specific device. Heating device 45 integrally includes a buffer tank 450, which ensures that the water heated by heating device 45 is at a uniform temperature.

[0044] The flow control valve 46 is a valve controlled by the control device 31 to regulate the amount of water supplied to the nozzle 2.

[0045] The switching device 47 separates the water heated by the heating device 45 into a first water W1 and a second water W2, and supplies the first water W1 and the second water W2 to the nozzle 2. The switching device 47 is configured to switch the flow rate ratio of a first flow rate of the first water W1 to a second flow rate of the second water W2.

[0046] Figure 3 This is an external perspective view of nozzle 2. Figure 4 It is along Figure 3 The cross-sectional view of nozzle 2 taken by line AA. Figure 5 This is an enlarged view of the main part of nozzle 2. Figure 5 It is a cross-sectional view, and dashed lines have been added to distinguish the parts from each other for easier understanding.

[0047] Nozzle 2 is a nozzle that directs warm water heated by heating device 45 toward a specific area of ​​the body of a person sitting on seat 30. Figures 3 to 5 As shown, the nozzle 2 includes a first cylindrical portion 5, a second cylindrical portion 6, and a cover portion 7. The nozzle 2 also includes a first connecting portion 8 and a second connecting portion 9.

[0048] The first cylindrical portion 5 has a central axis 50 extending in one direction D1. In the following description, one end side in one direction D1 is referred to as the upper side, and the other end side in one direction D1 is referred to as the lower side. The first cylindrical portion 5 has a portion in one direction D1 (Z-axis direction in the figure) in which a first inflow hole 51 is formed. The first inflow hole 51 is formed as a through hole penetrating the portion in one direction D1. First water W1, which is one of two portions of water generated by the heating device 45 and separated by the switching device 47, flows into the lower end opening of the first cylindrical portion 5, passes through the first inflow hole 51, and flows into the internal space of the first cylindrical portion 5, which is located at the upper portion 52 of the first cylindrical portion 5 and above the first inflow hole 51. Figure 5 and Figure 6As shown, the relationship between the cross-sectional area S1 of the first inlet hole 51 and the cross-sectional area S2 of the internal space of the upper portion 52 is such that the first water W1 flowing into the internal space from the first inlet hole 51 can be discharged from the upper opening of the first cylindrical portion 5 without contacting the inner circumferential surface of the upper portion 52. Specifically, S2 > S1. Although the shape of the first cylindrical portion 5 is cylindrical, it is not limited to a specific shape. Although the shape of the first inlet hole 51 is circular when viewed along one direction D1, it is not limited to a specific shape, and the first inlet hole 51 is arranged radially at the center of the first cylindrical portion 5. The cross-sectional area shows the area (size of the region) in the cutting plane of the cylinder, surrounded by the inner circumferential surface of the cylinder, when the cylinder is cut orthogonally to its central axis.

[0049] The second cylindrical portion 6 has a central axis 60 that coincides with the central axis 50 of the first cylindrical portion 5. The second cylindrical portion 6 is a cylindrical portion surrounding the outer peripheral surface of the first cylindrical portion 5. A first gap 21 is provided between the outer peripheral surface of the first cylindrical portion 5 and the inner peripheral surface of the second cylindrical portion 6, and the first gap 21 has a closed lower end. The inner peripheral surface of the second cylindrical portion 6 faces the outer peripheral surface of the first cylindrical portion 5. The lower end of the first gap 21 is closed by a portion of the first cylindrical portion 5. The first gap 21 has a radial length G1 that is narrower than the inner diameter L1 of the first inflow hole 51. The second cylindrical portion 6 protrudes upward beyond the upper end of the first cylindrical portion 5 in one direction D1. Therefore, the second water W2 flowing into the first gap 21 between the first cylindrical portion 5 and the second cylindrical portion 6 climbs over the upper end of the first cylindrical portion 5 and flows into the first cylindrical portion 5. The shape of the second cylindrical portion 6 can be a rectangular cylinder, but is not limited to a specific shape. The second cylindrical portion 6 has a cylindrical shape similar to that of the first cylindrical portion 5, and is arranged coaxially with the first cylindrical portion 5.

[0050] The cover 7 includes: a cover body 70 having an annular shape; and a cylindrical portion 71 extending upward from a surface on the front side (i.e., upper side) of the cover body 70. The cylindrical portion 71 is positioned on the side (i.e., upper side) opposite to the first inlet hole 51 of the first cylindrical portion 5 and is separate from the first cylindrical portion 5. The cylindrical portion 71 is coaxially arranged with the first cylindrical portion 5. That is, the first cylindrical portion 5, the second cylindrical portion 6, and the cylindrical portion 71 have the same axis. The shape of the cylindrical portion 71 is a cylindrical shape similar to that of the first cylindrical portion 5.

[0051] The cover portion 7 is arranged to close the upper end of the second cylindrical portion 6. The cover portion 7 includes: a cover body 70 that closes the upper end of the second cylindrical portion 6; and a cylindrical portion 71 that protrudes upward from the central portion of the cover body 70 in the radial direction. The cover portion 7 has a channel hole 72, which is formed as a through hole penetrating the cover portion 7 in one direction D1. The channel hole 72 is formed in the cover body 70 and the cylindrical portion 71. The cover portion 7 need not necessarily include the cylindrical portion 71, but may be constituted by the cover body 70. The central axis of the first inflow hole 51 and the central axis of the channel hole 72 are located on the same straight line.

[0052] The channel hole 72 has an upwardly increasing cross-sectional area. The channel hole 72 has a conical shape with a circular truncated head. The cover portion 7 surrounding the channel hole 72 has an inner circumferential surface 720 that is inclined in a conical shape. The inner circumferential surface 720 has an angle greater than 0 degrees and less than 10 degrees with the central axis of the channel hole 72.

[0053] The diameter L2 of the upper opening 721 of the channel hole 72 is greater than the diameter L3 of the lower opening 722 of the channel hole 72. The cross-sectional area S3 of the upper opening 721 is greater than the cross-sectional area S4 of the lower opening 722.

[0054] For example, diameter L3 is 1.35 mm and diameter L2 is 1.45 mm. In this case, the angle between the inner circumferential surface 720 and the central axis of the channel hole 72 is 3.57 degrees.

[0055] A second gap 22, which communicates with the first gap 21, is provided between the first cylindrical portion 5 and the cover portion 7. Therefore, the first cylindrical portion 5 faces the cover portion 7.

[0056] The second cylindrical portion 6 has a second inlet hole 61 formed as a through hole and an air supply hole 62 formed as a through hole, such that the second inlet hole 61 and the air supply hole 62 communicate with the first gap 21. The second inlet hole 61, which penetrates a portion of the peripheral wall of the second cylindrical portion 6 in the circumferential direction, is a through hole through which second water W2 flows into the first gap 21. This second water is the other of the two portions of water separated by the switching device 47. The second inlet hole 61 penetrates the peripheral wall at the portion that is part of the second cylindrical portion 6 and overlaps with the outer periphery of the first cylindrical portion 5. That is, the upper end of the first cylindrical portion 5 is located above the second inlet hole 61. The second water W2 flowing into the second inlet hole 61 collides with the outer peripheral surface of the first cylindrical portion 5.

[0057] The air supply hole 62 is a through hole through which air from the outside of the second cylindrical portion 6 is supplied to the first gap 21. The air supply hole 62 is located at the lower part of the second cylindrical portion 6 and communicates with the lower end of the first gap 21. The number of air supply holes 62 can be one or more, but... Figure 3 As shown, an air supply hole 62 is provided for the second cylindrical part 6.

[0058] like Figure 5 As shown, although the second inlet hole 61 is arranged above the air supply hole 62, the positional relationship between the air supply hole 62 and the second inlet hole 61 is not limited to a specific relationship. The second inlet hole 61 and the air supply hole 62 are configured such that the inflow direction of the second water W2 from the second inlet hole 61 and the inflow direction of air from the air supply hole 62 are parallel to each other. The air supply hole 62 and the second inlet hole 61 are arranged at positions 180 degrees apart from each other with the central axis 60 of the second cylindrical portion 6 as the center.

[0059] The first water W1 flowing out of the first inlet hole 51 passes through the channel hole 72 alone, or the second water W2 filling the inner side of the second cylindrical portion 6 passes through together with the first water W1. The cross-sectional area S4 of the lower opening 722 of the channel hole 72 is greater than the cross-sectional area S1 of the first inlet hole 51. In other words, the relationship S4>S1 is satisfied. Therefore, in the state where the second water W2 does not flow into the inner side of the first cylindrical portion 5 (i.e., in the state where the interior of the first cylindrical portion 5 is filled with air), the first water W1 flowing into the channel hole 72 from the first inlet hole 51 can pass through the channel hole 72 without contacting the inner circumferential surface 720 of the channel hole 72. The relationship between S2 and S4 can be S4≥S2. Alternatively, the relationship can be S2>S4 (where S4>S1).

[0060] The upper end of the second cylindrical part 6 is arranged above the upper end of the first cylindrical part 5, and the lower end of the second cylindrical part 6 is arranged at the same position in the vertical direction as the lower end of the first cylindrical part 5.

[0061] like Figure 4 As shown, the first connecting portion 8 is the part connected to the pipe fitting. The pipe fitting guides the first water W1, which is one of the two portions of water separated by the switching device 47. The first connecting portion 8 has an outer peripheral surface with a bamboo shoot-shaped retaining shape. The first connecting portion 8 is cylindrical and integral with the first cylindrical portion 5. The internal space of the first connecting portion 8 and the internal space of the first cylindrical portion 5 are continuous in a straight line. The first cylindrical portion 5 and the first connecting portion 8 constitute a cylindrical component. The first cylindrical portion 5 and the first connecting portion 8 are resin molded parts.

[0062] The second connecting portion 9 is the part that connects to the pipe fitting. The pipe fitting guides the second water W2, which is the other of the two portions of water separated by the switching device 47. The second connecting portion 9 has an outer peripheral surface with a bamboo shoot-shaped retaining shape. The second connecting portion 9 has a cylindrical shape extending in a direction orthogonal to a direction D1 (the X-axis direction in the figure) and is integral with the second cylindrical portion 6. The internal space of the second connecting portion 9 and the second inlet 61 of the second cylindrical portion 6 are continuous in a straight line. The second cylindrical portion 6, the cover portion 7, and the second connecting portion 9 are constructed as a single component. The second cylindrical portion 6, the cover portion 7, and the second connecting portion 9 are resin molded parts.

[0063] The switching device 47 is used to switch the flow rate ratio between a first flow rate and a second flow rate. The first flow rate is the flow rate of water flowing into the first inlet hole 51 of the nozzle 2, and the second flow rate is the flow rate of water flowing into the second inlet hole 61 of the nozzle 2. The switching device 47 does not have a pump function, but it can switch the flow rate ratio through a water path configuration operated by a motor 470. The switching device 47 is configured to achieve five switching modes that differ from each other in terms of flow rate ratio.

[0064] In the first switching mode, the switching device 47 switches the flow rate ratio such that the flow rate of water flowing into the second inlet hole 61 of the nozzle 2 is approximately 25% of the flow rate of water flowing into the first inlet hole 51 of the nozzle 2. At this time, the flow rate ratio of the first flow rate to the second flow rate is 3:1 to 7:1. When the switching device 47 is in the first switching mode, water that has become an intermittent flow in space after being discharged as a continuous flow is discharged from the channel hole 72 of the nozzle 2 (hereinafter referred to as the "first state," see [reference]). Figure 13 ).

[0065] In the second switching mode, the switching device 47 switches the flow rate ratio such that the flow rate of water flowing into the second inlet orifice 61 of the nozzle 2 is approximately 40% of the flow rate of water flowing into the first inlet orifice 51 of the nozzle 2. At this time, the flow rate ratio of the first flow rate to the second flow rate is 2.0:1 to 3.0:1. When the switching device 47 is in the second switching mode, a continuous water flow having a jet diameter that narrows in a specific cycle and including air bubbles mixed therein is discharged from the channel orifice 72 of the nozzle 2, as... Figure 14 As shown (hereinafter referred to as "second state"). Switching device 47 switches the flow rate ratio so that the second flow rate in the second state is higher than the second flow rate in the first state.

[0066] In the third switching mode, the switching device 47 allows substantially equal volumes of water to flow into the first inlet hole 51 and the second inlet hole 61 of the nozzle 2. At this time, the flow rate ratio of the first flow rate to the second flow rate is 1.0:1 to 1.5:1. When the switching device 47 is in the third switching mode, as such... Figure 15 or Figure 21The continuous jet of water shown is discharged from the channel hole 72 of the nozzle 2 (hereinafter referred to as "third state").

[0067] In the fourth switching mode, the switching device 47 switches the flow rate ratio so that water flows only into the first inlet hole 51 of the nozzle 2. At this time, the flow rate ratio of the first flow rate to the second flow rate is 1:0. When the switching device 47 is in the fourth switching mode, as... Figure 22 The continuous and narrow stream of water shown is discharged from the channel hole 72 of the nozzle 2 (hereinafter referred to as "fourth state").

[0068] In response to being set to control device 31 (see Figure 1 After pressing the post-cleaning button, the device 47 switches to the switching mode corresponding to the button that has been pressed.

[0069] The following describes the situation where intermittent water flow (i.e., water flow in the first state) is generated in the space. When water flow in the first state is generated, the first discharge state and the second discharge state are repeated as a general operation. In the first discharge state, the first water W1 flowing from the first inlet hole 51 into the upper portion 52 above the first inlet hole 51 passes through the channel hole 72 and is discharged from the channel hole 72, but the second water W2 flowing into the first gap 21 through the second inlet hole 61 is not discharged from the channel hole 72. In the second discharge state, the first water W1 flowing from the first inlet hole 51 into the upper portion 52 above the first inlet hole 51 passes through the channel hole 72. The second water W2 flowing from the second inlet hole 61 into the first gap 21 passes through the second gap 22 and the channel hole 72. Therefore, the first water W1 and the second water W2 are discharged together from the channel hole 72.

[0070] refer to Figures 6 to 13 The generation of water flow in the first state is described in detail, one by one. For example... Figure 6 As shown, in the injection state, first water W1 flows from the first inlet hole 51 into the upper portion 52 above the first inlet hole 51. The first water W1 flowing into the upper portion 52 passes through the air in the upper portion 52 and the air in the channel hole 72 without contacting the inner circumferential surface of the upper portion 52 or the inner circumferential surface 720 of the channel hole 72, and is discharged from the channel hole 72. This state is the first discharge state. In the first discharge state, second water W2 flows from the second inlet hole 61 into the first gap 21 and accumulates in the first gap 21. Due to the surface tension of water, the second water W2 does not flow out through the air supply hole 62. Therefore, in the first discharge state, the first water W1 flowing into the upper portion 52 from the first inlet hole 51 is discharged from the channel hole 72, but the second water W2 flowing into the first gap 21 from the second inlet hole 61 is not discharged from the channel hole 72. In the first discharge state, the second water W2 flowing into the first gap 21 from the second inlet hole 61 accumulates in the first gap 21 and does not reach the second gap 22, and air is in the second gap 22.

[0071] Then, when the second water W2 fills the first gap 21, as Figure 7 and Figure 8 As shown, the second water W2 passes through the second gap 22, and the second water W2 climbs over the upper end of the first cylindrical portion 5 and flows into the interior of the first cylindrical portion 5. The second water W2 flows into the interior of the first cylindrical portion 5 from at least a portion of the upper end of the first cylindrical portion 5 in the circumferential direction.

[0072] At this time, the second water W2 collides with the first water W1, is pulled in the flow direction of the first water W1, and flows into the interior of the first cylindrical portion 5, and the interior of the first cylindrical portion 5 is filled with the first water W1 and the second water W2. Then, as... Figure 9 As shown, water, which is a mixture of first water W1 and second water W2, is discharged from the channel hole 72. The water, as a mixture of first water W1 and second water W2, is discharged from the channel hole 72 with a diameter (in other words, cross-sectional area) substantially the same as the lower opening 722 of the channel hole 72, and therefore, a gap exists between the water and the inner circumferential surface 720 of the channel hole 72. This state is the second discharge state.

[0073] In the second discharge state, both the first and second conditions are met, thus generating an ejector effect. The first condition is that the flow velocity of the first water W1 in the first inlet hole 51 is higher than the flow velocity of the first water W1 and the second water W2 in the upper portion 52 of the first cylindrical section 5, causing a velocity difference. The second condition is that the upper portion 52 of the first cylindrical section 5 is filled with the first water W1 and the second water W2. This creates a negative pressure at the downstream end of the first inlet hole 51, thereby drawing in air through the air supply hole 62.

[0074] like Figure 10 As shown, the air drawn in through the air supply hole 62 passes through the first gap 21 and the second gap 22, and flows into the interior of the first cylindrical part 5 by being pulled to a position where negative pressure is generated at the downstream end of the first inlet hole 51, and flows into the interior of the channel hole 72 by being pulled by the flow of the first water W1.

[0075] Next, as Figure 11 As shown, the air flowing into the interior of the upper portion 52 of the first cylindrical section 5 and the interior of the channel hole 72 diffuses to surround the first water W1 and prevents the second water W2 from flowing into the first water W1. Furthermore, when the state in which the interior of the upper portion 52 of the first cylindrical section 5 is filled with the first water W1 and the second water W2 is released, the ejector effect fails, the air intake action ends, and the process returns to the first discharge state. Therefore, the flow, which is a coarse jet formed by merging the second water W2 with the first water W1, is switched to a fine jet containing only the first water W1. In this way, the first discharge state and the second discharge state are repeated.

[0076] Figure 12 This is a view of the state 1 of the water flow in the space after the water is discharged from nozzle 2. Figure 13 This is a view of the state 2 of the water flow in the space after the water is discharged from nozzle 2. In each of these figures, the first flying water W10 shown is in the first discharge state and corresponds only to the first water W1 discharged from the channel hole 72 into the air. The second flying water W12 is in the second discharge state and corresponds to the first water W1 and the second water W2 discharged together from the channel hole 72. The flow velocity of the first flying water W10 is higher than the flow velocity of the second flying water W12. Therefore, the first flying water W10 separates from the subsequent second flying water W12 and forms a water mass together with the previous second flying water W12, such as... Figure 13 As shown. In this way, the water discharged from nozzle 2 forms an intermittent flow in the space.

[0077] Subsequently, the description will be generated. Figure 14 The continuous water flow shown (i.e., the water flow in the second state) has a jet diameter that narrows during a particular cycle and includes air bubbles mixed therein. The second flow rate in the second state is higher than the second flow rate in the first state.

[0078] When water flow in the second state is generated Figures 6 to 8 The action shown is initially caused in a manner similar to that of generating water flow in the first state. The generation of water flow in the second state can be achieved through... Figure 9 The indicated action begins.

[0079] When water flow is generated in the second state, the second flow rate is higher than the second flow rate in the first state. Therefore, as... Figure 15 As shown, water, which is a mixture of first water W1 and second water W2, diffuses into the inner peripheral surface 720 and fills the interior of the channel hole 72. The water, which is a mixture of first water W1 and second water W2, is discharged from the channel hole 72 with a diameter (in other words, cross-sectional area) that is substantially the same as the upper opening 721 of the channel hole 72.

[0080] In this discharge state, the first and second conditions are satisfied, thus generating an ejector effect. The first condition is that the flow velocity of the first water W1 in the first inlet hole 51 is higher than the flow velocity of the first water W1 and the second water W2 in the upper portion 52 of the first cylindrical section 5, creating a velocity difference. The second condition is that the upper portion 52 of the first cylindrical section 5 is filled with the first water W1 and the second water W2. This generates a negative pressure at the downstream end of the first inlet hole 51. Furthermore, the third and fourth conditions are satisfied, thus generating an ejector effect. The third condition is that the flow velocity in the lower opening 722 of the channel hole 72 is higher than the flow velocity in the upper portion above the lower opening 722 of the channel hole 72, creating a velocity difference. The fourth condition is that the channel hole 72 is filled with the first water W1 and the second water W2. This generates a negative pressure in the lower opening 722 of the channel hole 72. That is, when water flow in the second state is generated, negative pressure is generated at the downstream end of the first inlet hole 51 and the lower end opening 722 of the channel hole 72, and air is drawn in through the air supply hole 62.

[0081] like Figure 16 As shown, air drawn in through the air supply hole 62 passes through the first gap 21 and the second gap 22, and flows into the interior of the upper portion 52 of the first cylindrical member 5 by being pulled to a position where negative pressure is generated at the downstream end of the first inflow hole 51. Then, the air drawn in through the air supply hole 62 collides with the water flow of the first water W1 by being pulled to a position where negative pressure is generated at the lower end opening 722 of the channel hole 72. Then, the air drawn in through the air supply hole 62 flows into the interior of the channel hole 72 by being pulled by the first water flow W1.

[0082] In the air flowing toward the position where negative pressure is generated at the lower end opening 722 of the channel hole 72, the bubbles are broken into tiny bubbles by the water flow of the first water W1, and the whole mixture is mixed into the first water W1 and the second water W2 in the channel hole 72.

[0083] Then, as Figure 17 and Figure 18 As shown, air drawn to a position where negative pressure is generated at the downstream end of the first inlet hole 51 reaches the downstream end of the first inlet hole 51, thereby eliminating the negative pressure generated at the downstream end of the first inlet hole 51. Then, air drawn to a position where negative pressure is generated at the lower opening 722 of the channel hole 72 and air drawn by the flow of the first water W1 enter the channel hole 72, thereby eliminating the generation of negative pressure at the lower opening 722 of the channel hole 72. This achieves a state where only the first water W1 is discharged from the channel hole 72.

[0084] When the negative pressure at the two locations (i.e., the downstream end of the first inlet hole 51 and the lower opening 722 of the channel hole 72) is eliminated, the second water W2 flows in and fills the interior of the upper portion 52 of the first cylindrical part 5 and the interior of the channel hole 72, as... Figure 19 and Figure 20 As shown. Therefore, negative pressure is generated again at two locations (i.e., the downstream end of the first inlet hole 51 and the lower end of the channel hole 72), thereby generating Figure 14 The water flow is shown and obtained by mixing the air as tiny bubbles into the first water W1 and the second water W2 in the channel hole 72.

[0085] When generating water flow in the second state, the second flow rate is higher than the second flow rate in the first state. Therefore, when generating water flow in the second state, the time interval between the release and generation of negative pressure is shorter than that in the first state. Figure 18 The state shown is switched to cancel the negative pressure generated at the two locations. Figure 20 The negative pressure state shown is as follows. Therefore, when generating water flow in the second state, it does not produce the state shown in the diagram. Figure 13 Instead of the intermittent flow shown, it produces a continuous flow of water with a jet diameter that narrows in a particular cycle and includes bubbles mixed therein.

[0086] When water flow in the second state is generated Figures 17 to 20 The repetitive motion shown generates Figure 14 The continuous water flow shown has a jet diameter that narrows in a particular cycle and includes air bubbles mixed therein.

[0087] Subsequently, the description will be generated. Figure 21 The diagram illustrates a continuous jet of water (i.e., water flow in the third state). The second flow rate in the third state is higher than the second flow rate in the first state, but lower than the second flow rate in the second state. In the third state, the first and second flow rates are essentially equal.

[0088] When water flow occurs in the third state Figures 6 to 9 The actions shown initially occur in a manner similar to the water flow generated in the first state. The generation of water flow in the third state can be achieved through... Figure 9 The indicated action begins.

[0089] When water flow in the third state is generated, Figure 9In the illustrated operation, the first and second conditions are satisfied, thus generating an ejector effect. The first condition is that the flow velocity of the first water W1 in the first inlet hole 51 is higher than the flow velocity of the first water W1 and the second water W2 in the upper portion 52 of the first cylindrical section 5, causing a velocity difference. The second condition is that the upper portion 52 of the first cylindrical section 5 is filled with the first water W1 and the second water W2. This generates a negative pressure at the downstream end of the first inlet hole 51. However, when generating the water flow in the third state, the second flow rate is significantly higher than the second flow rate in the first state, thus preventing air drawn in through the air supply hole 62 due to the pressure of the second water W2 from reaching the first water W1. Therefore, when generating the water flow in the third state, no ejector effect occurs. Figures 10 to 13 The action shown can generate a jet, which is Figure 15 or Figure 21 The water flow shown is continuous and does not include air bubbles mixed in it. The water flow in the third state maintains its continuous flow in the space after being discharged from the channel hole 72.

[0090] Therefore, the second flow rate in the third state can be set within the range of a flow rate ratio of 1.0:1 to 1.5:1 between the first and second flow rates. When the second flow rate in the third state is higher than a specific value, it can generate... Figure 15 The jet shown, and when the second flow rate in the third state is below a certain value, can produce... Figure 21 The jet shown.

[0091] Subsequently, the description will be generated. Figure 22 The case shown is a continuous narrow water flow (i.e., water flow in the fourth state). When generating water flow in the fourth state, only the first water W1 is supplied to the nozzle 2, and the second water W2 is not supplied.

[0092] When water flow in the fourth state is generated, the first water W1 in the injection state flows into the upper portion 52 of the first cylindrical section 5 from the first inlet hole 51. The first water W1 flowing into the upper portion 52 of the first cylindrical section 5 passes through the air in the upper portion 52 of the first cylindrical section 5 and the air in the channel hole 72 without contacting the inner circumferential surface of the upper portion 52 of the first cylindrical section 5 or the inner circumferential surface 720 of the channel hole 72, and is discharged from the channel hole 72. The first water W1 is discharged from the channel hole 72 with approximately the same diameter (in other words, cross-sectional area) as the first inlet hole 51.

[0093] Using the aforementioned hygienic cleaning device 1, the flow rate ratio of the first flow rate to the second flow rate is changed by the switching device 47, allowing four types of water flow to be selectively discharged from the channel hole 72 of a single nozzle 2. Therefore, it is possible to precisely respond to the preferences of the user seated on the seat 30.

[0094] Furthermore, in the hygienic cleaning device 1, when water flow is generated in the first, third, and fourth states, the inner peripheral surface 720 of the channel hole 72 is less likely to be wetted by water, thus suppressing the increase in the proportion of water adhering to the inner peripheral surface 720. Therefore, when a continuous water flow is generated, the hygienic cleaning device 1 can suppress the continuous water flow, which diffuses to the inner peripheral surface 720 of the channel hole 72 and includes air bubbles mixed therein, from changing to an intermittent water flow due to the pulsation of the water flow, thereby stably generating a continuous water flow including air bubbles mixed therein. Therefore, the hygienic cleaning device 1 can selectively and stably generate intermittent water flow and a continuous water flow including air bubbles mixed therein without using a pump.

[0095] (Variation)

[0096] Next, variations of the above-described sanitary cleaning device 1 will be described. The variations described below can be combined with each other accordingly.

[0097] The sanitation cleaning device 1 can be configured to selectively discharge only the water flow in the first and second states, and need not be able to discharge all or some of the water flow in the third and fourth states. In other words, the switching device 47 can be arranged to switch the flow rate ratio only between the first switching mode and the second switching mode.

[0098] The inner circumferential surface 720 of the channel hole 72 can form an angle greater than or equal to 10 degrees with the central axis of the channel hole 72.

[0099] The structure of nozzle 2 is not limited to Figure 3 and Figure 4 The structure shown is such that the nozzle 2 is configured such that the water flow switches between at least two states, including the first state and the second state, according to the flow rate ratio of the first flow rate to the second flow rate.

[0100] (Summarize)

[0101] The sanitary cleaning apparatus 1 according to the first aspect of this disclosure has the following structure.

[0102] The first aspect of the hygienic cleaning device (1) includes a nozzle (2) configured to discharge water toward a local area of ​​a seated person. The nozzle (2) includes a first cylindrical portion (5), a second cylindrical portion (6), and a cover portion (7). The first cylindrical portion (5) has a central axis (50) extending in one direction (D1). The second cylindrical portion (6) has a central axis (60) coinciding with the central axis (50) of the first cylindrical portion (5) and surrounding the outer peripheral surface of the first cylindrical portion (5). The cover portion (7) closes the upper end, which is one end of the second cylindrical portion (6) in one direction (D1). The first cylindrical portion (5) has a portion in one direction (D1) in which a first inflow hole (51) is formed, the first inflow hole (51) being formed as a through hole extending through the portion in one direction (D1). The cover portion (7) has a channel hole (72) formed as a through hole extending through the cover portion (7) in one direction (D1). A first gap (21) is provided between the outer peripheral surface of the first cylindrical portion (5) and the inner peripheral surface of the second cylindrical portion (6). The first gap (21) has a lower end, which is the other end in one direction (D1) and is closed. A second gap (22) communicating with the first gap (21) is provided between the first cylindrical portion (5) and the cover portion (7). The first cylindrical portion (5) faces the cover portion (7). The second cylindrical portion (6) has a second inlet hole (61) formed as a through hole and an air supply hole (62) formed as a through hole, which communicate with the first gap (21). The cross-sectional area of ​​the first inlet hole (51) is smaller than the cross-sectional area of ​​the internal space of the upper part of the first cylindrical portion (5), which is located in the upper part of the first cylindrical portion (5) and above the first inlet hole (51). The cross-sectional area of ​​the first inlet hole (51) is smaller than the cross-sectional area of ​​the channel hole (72). The cross-sectional area of ​​the channel hole (72) increases upward. The central axis of the first inlet hole (51) and the central axis of the channel hole (72) are on the same straight line. The first cylindrical portion (5) has an upper end located above the second inlet hole (61). The sanitary cleaning device (1) is configured to change the flow rate ratio between a first flow rate and a second flow rate during operation to switch the water flow between at least two states, including a first state and a second state. Here, the first flow rate is the flow rate of water flowing into the first inlet hole (51). The second flow rate is the flow rate of water flowing into the second inlet hole (61). In the first state, the continuous water flow passing through the channel hole (72) is discharged from the channel hole (72) with a gap between the continuous water flow and the inner peripheral surface (720) of the channel hole (72), and the continuous water flow then becomes an intermittent water flow in the space. In the second state, the continuous water flow including bubbles mixed therein and diffused to the inner peripheral surface (720) of the channel hole (72) is discharged from the channel hole (72).

[0103] In the first aspect of the sanitary cleaning apparatus (1), in order to generate an intermittent water flow in a first state, a continuous water flow passing through the channel hole (72) is discharged from the channel hole (72) when there is a gap between the continuous water flow and the inner peripheral surface (720) of the channel hole (72). Therefore, in the first aspect of the sanitary cleaning apparatus (1), the chance of the inner peripheral surface (720) of the channel hole (72) being wetted by water can be reduced, and the increase in the proportion of water adhering to the inner peripheral surface (720) can be suppressed. Therefore, in the first aspect of the sanitary cleaning apparatus (1), when a continuous water flow including air bubbles mixed therein and diffused to the inner peripheral surface (720) of the channel hole (72) is discharged from the channel hole (72), the continuous water flow can be prevented from becoming an intermittent water flow. Therefore, the first aspect of the sanitary cleaning apparatus (1) enables the selective and stable generation of intermittent water flow and continuous water flow including air bubbles mixed therein without the use of a pump.

[0104] The sanitary cleaning apparatus (1) according to the second aspect of this disclosure has the following structure in addition to the structure of the first aspect.

[0105] The second aspect of the hygienic cleaning apparatus (1) includes a switching device (47) configured to change the flow rate ratio. The switching device (47) is configured to change the flow rate ratio such that the second flow rate in the second state is higher than the second flow rate in the first state.

[0106] In the second aspect of the sanitary cleaning apparatus (1), when water flow in the second state is generated, the volume flowing into the second inlet hole (61) increases, and therefore, the flow rate to the channel hole (72) via the first gap (21) and the second gap (22) can increase. Therefore, in the second aspect of the sanitary cleaning apparatus (1), water easily diffuses into the inner circumferential surface (720) within the channel hole (72), and a continuous flow of water, including air bubbles mixed therein and diffused into the inner circumferential surface (720) of the channel hole (72), easily exits from the channel hole (72). Therefore, the second aspect of the sanitary cleaning apparatus (1) facilitates the stable generation of water flow in the second state.

[0107] The sanitary cleaning apparatus (1) according to the third aspect of this disclosure has the following structure in addition to the structure of the first or second aspect.

[0108] In the third aspect of the sanitary cleaning device (1), the inner peripheral surface (720) of the channel hole (72) has an angle greater than 0 degrees and less than 10 degrees relative to the central axis of the channel hole (72).

[0109] In the third aspect of the sanitary cleaning device (1), the inner peripheral surface (720) of the channel hole (72) has a relatively small inclination. Therefore, when water flow in the second state is generated, water can easily diffuse to the inner peripheral surface (720) of the channel hole (72), thereby easily generating water flow in the second state.

[0110] The sanitary cleaning apparatus (1) according to the fourth aspect of this disclosure has the following structure in addition to the structure of any one of the first to third aspects.

[0111] In the fourth aspect of the sanitary cleaning device (1), at least two states include the third state. In the third state, continuous water flow passing through the channel hole (72) is discharged from the channel hole (72) and then remains continuously flowing in the space, provided that there is a gap between the continuous water flow and the inner peripheral surface (720) of the channel hole (72).

[0112] In the fourth aspect of the sanitary cleaning apparatus (1), when a continuous water flow in the third state is generated, the continuous water flow passing through the channel hole (72) is discharged from the channel hole (72) while there is a gap between the channel hole (72) and the inner peripheral surface (720). Therefore, in the fourth aspect of the sanitary cleaning apparatus (1), the chance of the inner peripheral surface (720) of the channel hole (72) being wetted by water can be reduced, the increase in the proportion of water adhering to the inner peripheral surface (720) can be suppressed, and a continuous water flow including air bubbles mixed therein can be stably generated.

[0113] The sanitary cleaning apparatus (1) according to the fifth aspect of this disclosure has the following structure in addition to the structure of any one of the first to fourth aspects.

[0114] In the fifth aspect of the hygienic cleaning device (1), at least two states include a fourth state. In the fourth state, water flow including bubbles mixed therein and diffused to the inner circumferential surface (720) of the channel hole (72) and water flow not containing bubbles mixed therein and having gaps with the inner circumferential surface (720) of the channel hole (72) are alternately and continuously discharged from the channel hole (72).

[0115] In the fifth aspect of the hygienic cleaning device (1), a water flow including air bubbles mixed therein and diffused to the inner circumferential surface (720) of the channel hole (72) and a water flow not containing air bubbles and having gaps with the inner circumferential surface (720) of the channel hole (72) are alternately and continuously discharged from the channel hole (72). Therefore, the fifth aspect of the hygienic cleaning device (1) enables the discharge of a continuous water flow having a jet diameter that narrows in a particular cycle and including air bubbles mixed therein, and thus, a water flow that produces a strong impact and cleaning sensation compared to the water flow in the second state can be applied to a local area of ​​the user.

[0116] This disclosure is not limited to the embodiments described above. For example, another embodiment may be implemented by combining the components described in this specification as needed or by removing some components. Furthermore, this disclosure also covers variations of the above embodiments that can be conceived by those skilled in the art within the spirit of this disclosure (i.e., without departing from the scope set forth in the wording of the claims).

[0117] Explanation of reference numerals in the attached figures

[0118] 1. Sanitary cleaning device

[0119] 2 nozzles

[0120] 20 Nozzle Body

[0121] 21 First gap

[0122] 22 Second gap

[0123] 3 toilets

[0124] 30 seats

[0125] 31 Control Equipment

[0126] 32 toilet bowl

[0127] 4 water circuits

[0128] 40 water supply connection port

[0129] 41 Filter

[0130] 42 Water Stop Solenoid Valve

[0131] 43 Pressure reducing valve

[0132] 44 Vacuum Circuit Breaker

[0133] 45 Heating Equipment

[0134] 450 buffer tank

[0135] 46 Flow control valve

[0136] 47 Switching devices

[0137] 470 motor

[0138] 48 ventilation ducts

[0139] 5 First cylindrical section

[0140] 50 center axis

[0141] 51 First Inlet Hole

[0142] 52 Upper part

[0143] 6 Second cylindrical section

[0144] 60 central axis

[0145] 61 Second Inlet Hole

[0146] 62 air supply holes

[0147] 7 cover

[0148] 70 cover body

[0149] 71 Cylindrical section

[0150] 72-channel hole

[0151] 720 inner peripheral surface

[0152] 721 with an opening at the top

[0153] 722 lower opening

[0154] 8 First connecting part

[0155] 9 Second connecting part

[0156] D1 One direction

[0157] L1 inner diameter

[0158] L2 diameter

[0159] L3 diameter

[0160] S1 cross-sectional area

[0161] S2 cross-sectional area

[0162] S3 cross-sectional area

[0163] S4 cross-sectional area

[0164] W1 First Water

[0165] W2 Second Water

[0166] W10 First Flying Water

[0167] W12 Second Flying Water

Claims

1. A hygienic cleaning device comprising a nozzle configured to discharge a stream of water toward a localized area of ​​a seated person's body. The nozzle includes: The first cylindrical portion has a central axis extending in one direction. The second cylindrical portion has a central axis that coincides with the central axis of the first cylindrical portion and surrounds the outer peripheral surface of the first cylindrical portion. A cover portion that closes the upper end, said upper end being one end of the second cylindrical portion in one direction. The first cylindrical portion has a portion in one direction in which a first inflow hole is formed, the first inflow hole being formed as a through hole penetrating the portion in that one direction. The cover has a channel hole, which is formed as a through hole penetrating the cover in one direction. A first gap is provided between the outer peripheral surface of the first cylindrical portion and the inner peripheral surface of the second cylindrical portion. The first gap has a lower end, which is the other end in the same direction and is closed. A second gap, communicating with the first gap, is provided between the first cylindrical portion and the cover portion. The first cylindrical portion faces the cover portion. The second cylindrical portion has a second inlet hole formed as a through hole and an air supply hole formed as a through hole, the second inlet hole and the air supply hole communicating with the first gap. The cross-sectional area of ​​the first inlet hole is smaller than the cross-sectional area of ​​the internal space of the upper portion of the first cylindrical part, and the internal space is located at the upper portion of the first cylindrical part and above the first inlet hole. The cross-sectional area of ​​the first inflow hole is smaller than the cross-sectional area of ​​the channel hole. The cross-sectional area of ​​the channel hole increases upwards. The central axis of the first inflow hole and the central axis of the channel hole are on the same straight line. The first cylindrical portion has an upper end located above the second inlet hole. The hygienic cleaning device is configured to change the flow rate ratio between a first flow rate and a second flow rate during operation to switch the water flow between at least two states, including the first state and the second state. The first flow rate is the flow rate of water flowing into the first inlet orifice. The second flow rate is the flow rate of water flowing into the second inlet orifice. In the first state, with a gap existing between the continuous water flow and the inner circumferential surface of the channel hole, the continuous water flow passing through the channel hole is discharged from the channel hole, and the continuous water flow then becomes an intermittent water flow in space. In the second state, a continuous flow of water, including bubbles mixed therein and diffused to the inner circumferential surface of the channel hole, is discharged from the channel hole.

2. The sanitary cleaning apparatus of claim 1, further comprising a switching device configured to change the flow rate ratio, wherein... The switching device is configured to change the flow rate ratio such that the second flow rate in the second state is higher than the second flow rate in the first state.

3. The sanitary cleaning device according to claim 1 or 2, wherein... The inner circumferential surface of the channel hole has an angle greater than 0 degrees and less than 10 degrees relative to the central axis of the channel hole.

4. The sanitary cleaning device according to claim 1 or 2, wherein The at least two states include a third state, and In the third state, the continuous water flow passes through the channel hole and exits from the channel hole with a gap between the channel hole and the inner circumferential surface of the channel hole, and then remains as a continuous flow in the space.

5. The sanitary cleaning apparatus according to claim 1 or 2, wherein... The at least two states include a fourth state, and In the fourth state, water flow including bubbles mixed therein and diffused to the inner circumferential surface of the channel hole, and water flow excluding bubbles mixed therein and having gaps with the inner circumferential surface of the channel hole are alternately and continuously discharged from the channel hole.

6. The sanitary cleaning apparatus as described in claim 4, wherein The at least two states include a fourth state, and In the fourth state, water flow including bubbles mixed therein and diffused to the inner circumferential surface of the channel hole, and water flow excluding bubbles mixed therein and having gaps with the inner circumferential surface of the channel hole are alternately and continuously discharged from the channel hole.

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