Shower apparatus

Abstract

To provide a shower apparatus capable of achieving more effective cleaning performance.SOLUTION: A shower apparatus has a plurality of mist nozzles on a water discharge surface side. When water is discharged from the mist nozzles under a water supply pressure of 0.1 MPa, the average flow velocity of discharged water droplets is 2 m / s or more at a point 350 mm away from the mist nozzles.SELECTED DRAWING: Figure 15

Description

Technical Field

[0001] The present invention relates to a shower device that utilizes mist spraying, which is water spraying with a fine particle size.

Background Art

[0002] Conventionally, a shower device that utilizes mist spraying, which is water spraying with a fine particle size, has been known (for example, Patent Document 1).

[0003] A shower device that utilizes mist spraying has less skin irritation while having a high sebum removal rate. For this reason, it is said to be excellent for face washing applications.

[0004] Such characteristics are due to the characteristics of mist spraying, in which the water droplets are finer, the number of water droplets is larger, and the water droplet distribution is more uniform, compared to general shower spraying.

[0005] More specifically, in general shower spraying, relatively large water droplets collide with dirt in patches (in a mottled pattern), while in mist spraying, a large number of relatively small water droplets collide with dirt uniformly. Thus, according to mist spraying, both better skin feel and higher detergency can be achieved simultaneously.

[0006] The average particle size of the water sprayed by a shower nozzle is about 2000 μm, and the average particle size of the water sprayed by a mist nozzle is 800 μm or less.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] As described above, mist spraying can achieve a higher cleaning power compared to general shower spraying.

[0009] The inventor of the present invention studied the average flow velocity of mist spraying measured based on the average flow velocity measurement method described below, and found that it being 2 m / s or more is an essential condition for achieving a more effective cleaning power.

[0010] The present invention was devised based on the above findings. The object of the present invention is to provide a shower device capable of achieving a more effective cleaning power.

Means for Solving the Problems

[0011] The present invention is a shower device having a plurality of mist nozzles on the water spraying surface side, and when spraying water from the mist nozzles under a water supply pressure of 0.1 MPa, at a point 350 mm away from the mist nozzles, the average flow velocity of the water droplets is 2 m / s or more.

[0012] According to the present invention, a sebum removal rate of 80% can be achieved for the sebum removal rate measured based on the sebum removal rate measurement method described below.

[0013] In the present invention, further preferable conditions from the viewpoint of "skin feel" are: (1) when spraying water from the mist nozzles under a water supply pressure of 0.1 MPa, at a point 350 mm away from the mist nozzles, the average particle diameter of the water droplets is 460 μm or less, and (2) the average flow velocity is 4.2 m / s or less.

[0014] It was confirmed by a monitoring test with 15 subjects that when such conditions are satisfied, the "skin feel" is preferable. When the average particle diameter of the water droplets is larger than 460 μm, it seems that the "skin feel" is felt to be poor, perhaps because the mist feeling is insufficient. On the other hand, when the average flow velocity is larger than 4.2 m / s, it seems that the stimulation to the skin is too strong.

[0015] Furthermore, in the present invention, from the viewpoint of suppressing a decrease in temperature after water discharge, suitable conditions are (if the temperature decrease after water discharge is large, it is inconvenient to use because it is necessary to change the temperature setting when switching the water discharge mode, etc.), the average particle diameter is 330 μm or more.

[0016] It was confirmed by a monitoring test with 15 subjects that when such conditions are satisfied, the "level of temperature decrease" is suitable.

[0017] In addition, as a configuration of the mist nozzle that satisfies each of the above conditions, the present inventor has developed the following shower device. That is, the plurality of mist nozzles include at least one pair of mist nozzles, and the shower device includes a guide flow path that guides hot water or water supplied from a water supply member toward the water discharge surface side, a run-up flow path that communicates with the guide flow path and extends in a direction intersecting the water discharge direction by the at least one pair of mist nozzles, a one-end-side swirling chamber that is a substantially cylindrical space and communicates with one end side of the run-up flow path via a one-end-side orifice, a one-end-side water discharge hole that communicates with the one-end-side swirling chamber and constitutes one of each pair of mist nozzles, a the other-end-side swirling chamber that is a substantially cylindrical space and communicates with the other end side of the run-up flow path via a the other-end-side orifice, and a the other-end-side water discharge hole that communicates with the other-end-side swirling chamber and constitutes the other of each pair of mist nozzles.

[0018] According to such a shower device, since one run-up flow path is shared for mist water discharge from two (one pair of) water discharge holes on the one end side and the other end side, the space utilization efficiency is high. Therefore, a larger number of mist nozzles can be arranged at a higher density.

[0019] In this case, further, at least a part of the guide flow path is partitioned by an upper member for forming a mist flow path, and it is preferable that at least a part of each of the run-up flow path, the one-end-side swirling chamber, and the other-end-side swirling chamber is partitioned by a lower member for forming a mist flow path.

[0020] According to this, compared with the case where all components are composed of a single member, the difficulty of design and manufacturing can be significantly reduced. Therefore, especially when a large number of mist nozzles are mounted, the degree of freedom in design and manufacturing can be increased.

[0021] Also, in this case, it is preferable that the upper member for forming the mist flow path partitions the upper sides of the one-end-side swirling chamber and the other-end-side swirling chamber, and the lower member for forming the mist flow path partitions the lower sides of the one-end-side swirling chamber, the one-end-side water discharge hole, the lower sides of the other-end-side swirling chamber, and the other-end-side water discharge hole.

[0022] According to this, the dimensional accuracy regarding the water discharge holes corresponding to the lower sides of the respective swirling chambers depends only on the manufacturing accuracy of the lower member for forming the mist flow path and is not affected by the assembly of the upper member for forming the mist flow path and the lower member for forming the mist flow path. Therefore, desired (in accordance with the design content) mist water discharge can be provided with higher precision.

[0023] Furthermore, in this case, it is preferable that the lower member for forming the mist flow path partitions a one-end-side truncated conical portion between the lower side of the one-end-side swirling chamber and the one-end-side water discharge hole, and partitions a other-end-side truncated conical portion between the lower side of the other-end-side swirling chamber and the other-end-side water discharge hole.

[0024] According to this, also regarding the dimensional accuracy of each truncated conical portion, it depends only on the manufacturing accuracy of the lower member for forming the mist flow path and is not affected by the assembly of the upper member for forming the mist flow path and the lower member for forming the mist flow path. Therefore, desired (in accordance with the design content) mist water discharge can be provided with higher precision.

[0025] Furthermore, in this case, it is preferable that the one-end-side truncated conical portion and the other-end-side truncated conical portion have the same height as each other, and the one-end-side orifice and the other-end-side orifice have the same height as each other and have a height greater than the height of the one-end-side truncated conical portion and the other-end-side truncated conical portion.

[0026] According to this, a relatively high mist discharge flow rate can be realized relatively easily.

[0027] Also, in this case, the run-up flow path is provided to impart momentum for hot water or water to swirl in the swirl chamber to the hot water or water in advance. Therefore, the run-up flow path is preferably provided along the swirling direction in the swirl chamber, that is, it is preferably extended in a direction substantially perpendicular to the water discharge direction by the mist nozzle. The substantially perpendicular direction is a direction including a range of about ±30° with respect to the strictly perpendicular direction.

[0028] Furthermore, when the at least one pair of mist nozzles includes a plurality of pairs of mist nozzles circumferentially distributed on a substantially same circumference, the run-up flow path is preferably a linear flow path slightly inclined with respect to the tangential direction in the circumferential direction. According to this, since a plurality of (all) run-up flow paths can be arranged generally along the circumferential direction, the radial occupation length can be made very compact. Thereby, a larger number of mist nozzles can be arranged at a higher density.

[0029] Furthermore, regarding the run-up flow path, it is preferable that the one-end-side swirl chamber and the other-end-side swirl chamber are laid out in a relationship of 180° rotational symmetry in a plan view. According to this, the design of evenly (symmetrically) supplying hot water or water to a pair of mist nozzles via the run-up flow path can be facilitated.

Advantages of the Invention

[0030] According to the present invention, a sebum removal rate of 80% can be achieved with respect to the sebum removal rate measured based on the sebum removal rate measurement method described later.

Brief Description of the Drawings

[0031]

Figure 1

Figure 2

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Figure 8

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Figure 10

Figure 11

Figure 12

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Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Embodiments for Carrying Out the Invention

[0032] (Basic Configuration) Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The shower device of this embodiment is a shower device that can switch between a plurality of water discharge modes (capable of discharging water in a plurality of water discharge modes).

[0033] FIG. 1 is a schematic perspective view showing a shower device 1 according to this embodiment, FIG. 2 is a longitudinal sectional view of the shower device 1 of this embodiment, FIG. 3 is a partial sectional perspective view of the shower device 1 of this embodiment, and FIG. 4 is an exploded perspective view of the shower device 1 of this embodiment. Further, FIG. 5 is a schematic diagram for explaining the opening and closing of a pilot hole, and FIG. 6 is a schematic diagram for explaining a disk pressing member.

[0034] As shown in FIGS. 1 to 3, the shower device 1 of this embodiment includes a storage chamber 5 (also referred to as a cavity) in which water is supplied and stored from a water supply source (not shown) through water supply members 2 and 3.

[0035] On the water discharge surface side of the shower device 1 with respect to the storage chamber 5, a secondary side flow path member 4 formed by overlapping four substantially disk-shaped element members 40, 47, 48, and 49 is provided. The secondary side flow path member 4 has three (an example of a plurality) water discharge flow paths corresponding to three (an example of a plurality) water discharge modes.

[0036] Referring also to FIGS. 4 to 6, on the element member 40 of the secondary side flow path member 4 facing the storage chamber 5, three valve seats 41 to 43 raised on the storage chamber 5 side are formed, and communication holes communicating with the corresponding flow paths are provided at the centers of the respective valve seats 41 to 43. The three valve seats 41 to 43 (and the corresponding flow paths) are arranged annularly and evenly at 120-degree intervals in the circumferential direction.

[0037] Corresponding to each of the three valve seats 41 to 43, diaphragm valves 21 to 23 are provided annularly. The three diaphragm valves 21 to 23 are integrally formed as a single diaphragm member 20, but each diaphragm valve 21 to 23 can operate independently.

[0038] In addition, a seal ring portion 24 is formed on the outer peripheral portion of the diaphragm member 20. The seal ring portion 24 is hermetically sandwiched between the upper edge portion 40a of the element member 40 and the cover member 8. On the other hand, the central region of the diaphragm member 20 is supported on the upper surface of the element member 40 via the space member 38.

[0039] In addition, each of the diaphragm valves 21 to 23 is provided with a coil spring (not shown) between the lower surface of the cover member 8, and is biased in the closing direction by the coil spring.

[0040] In addition, the three diaphragm valves 21 to 23 of the present embodiment are arranged in an annular shape, and pilot holes (a part of which are back pressure chamber outflow holes 21c to 23c formed on the lower surface side of the cover member 8) for communicating the back pressure chambers 21b to 23b of each diaphragm valve 21 to 23 with the space below the element member 40, which is the space outside the storage chamber 5, are intensively provided in the region on the central side of the arrangement of the three diaphragm valves 21 to 23, and are opened and closed by a disk member 10 that functions as a common pilot valve. (When there are two diaphragm valves, the pilot holes for communicating the back pressure chambers of each diaphragm valve with the space below the element member 40, which is the space outside the storage chamber 5, can be intensively provided in the region on the intermediate side of the arrangement of the two diaphragm valves.)

[0041] The disk member 10 is made of resin, is rotatably supported around its own rotation axis, and has 12 teeth 10t on its outer peripheral portion (see also FIG. 7 described later).

[0042] Referring particularly to FIG. 4, the disk member 10 has four (an example of a plurality) communication holes 10h, and each of the four communication holes 10h selectively communicates with back-pressure chamber outflow holes 21c to 23c provided in the back-pressure chambers 21b to 23b of the respective diaphragm valves 21 to 23 according to the rotational position of the disk member 10, thereby releasing the pilot holes of the diaphragm valves 21 to 23. More specifically, the pilot holes of the diaphragm valves 21 to 23 are released when the back-pressure chamber outflow holes 21c to 23c and outflow holes 44 to 46 provided in the element member 40 corresponding to the back-pressure chamber outflow holes 21c to 23c are selectively communicated by the communication holes 10h of the disk member 10. The four communication holes 10h are evenly arranged at 90-degree intervals in the circumferential direction. The back-pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are evenly arranged at 120-degree intervals in the circumferential direction.

[0043] Subsequently, referring particularly to FIG. 5, the disk pressing member 30 is interposed between the back-pressure chamber outflow holes 21c to 23c and the disk member 10, and the coil spring 35 presses the disk member 10 in a direction away from the back-pressure chamber outflow holes 21c to 23 (toward the element member 40).

[0044] In addition, the disk pressing member 30 is provided with outflow communication paths 31c to 33c communicating with the back-pressure chamber outflow holes 21c to 23c of the respective diaphragm valves 21 to 23. In the present embodiment, the outflow communication paths 31c to 33c are each constituted by a tubular portion 31 to 33, and each tubular portion 31 to 33 is inserted into the corresponding back-pressure chamber outflow hole 21c to 23c. A gap remains between each tubular portion 31 to 33 and the back-pressure chamber outflow hole 21c to 23c, and the gap functions as a back-pressure chamber inflow hole. Alternatively, as shown in FIG. 4, an aspect in which back-pressure chamber inflow holes 21d to 23d are provided in a part of the diaphragm valves 21 to 23 may also be adopted.

[0045] Returning to FIGS. 1 to 3, a push button 11 is provided at the lower part of the shower head housing 7 as a switching operation part to which the user applies an operating force. (Instead of the push button 11, other types of buttons, slide switches, etc. may be provided.)

[0046] The push button 11 is configured to rotate around a rotation axis 11s each time the user performs a pressing operation (each time the user applies a pressing force as an operating force). Then, in conjunction with the rotation operation of the push button 11, the abutting slide inclined portion 11a of the push button 11 (see FIG. 4) and the abutting ring 12a provided at the base end portion of the rod portion 12 (see FIG. 4) are utilized, and the rod portion 12 reciprocates in its own axial direction.

[0047] The tip of the rod portion 12 is exposed in the storage chamber 5 (in water) (see FIG. 6), and it is made of a metal rod such as stainless steel having a rust-proof property. In the present embodiment, the rod portion 12 penetrates slidably through an element member 40 integrally fixed to the shower head housing 7. A seal ring member 12s is provided to maintain watertightness (see FIG. 4). The rod portion 12 may be composed not only of a rigid body but also of a plastic body such as a string or an elastic body such as rubber.

[0048] FIG. 7 is a schematic diagram for explaining the rotation of the disk member 10. As shown in FIG. 7, a coil spring 14 is disposed around the tip of the rod portion 12 located in the storage chamber 5. The base end of the coil spring 14 is fixed to the element member 40, and thereby it is fixed to the shower head housing 7 (with respect to the rotation axis 11s of the push button 11).

[0049] A claw member 15 is fixed to the tip of the coil spring 14, and a stopper 13 for the claw member 15 is attached to the tip of the rod portion 12. The tip of the coil spring 14 and the claw member 15 are movable in the axial direction in a region on the base end side of the rod portion 12 with respect to the stopper 13 due to the deformation of the coil spring 14 in the axial direction of the coil spring 14.

[0050] Furthermore, the tip of the coil spring 14 and the claw member 15 can also move (change their postures) in the inclined direction by deforming in the direction inclined with respect to the axial direction of the coil spring 14.

[0051] On the side surface of the claw member 15 on the side of the disk member 10, there is provided a claw 15t that engages with the tooth 10t of the disk member 10. And during the movement of the rod portion 12, the disk member 10 is rotated by the claw 15t pulling in the tooth 10t.

[0052] In addition, a detent claw 16 that prevents the disk member 10 (tooth 10t) from rotating in the reverse direction is held by a detent claw fixing portion 17 provided on the element member 40.

[0053] (Function brought about by the basic configuration) When the pressing button 11 is pressed by the user, due to the pressing force (operating force), the contact sliding inclined portion 11a of the pressing button 11 rotates around the rotation axis 11s, and the rod portion 12 is moved axially toward the proximal end side via the contact ring 12a.

[0054] The state of FIG. 7 corresponds to the state before the pressing operation. When the movement of the rod portion 12 starts from this state, the claw 15t of the claw member 15 pulls in the tooth 10t of the disk member 10, so that the disk member 10 is rotated. In the state where the pressing button 11 is at the innermost position and the rod portion 12 is moved to the most proximal end side, the detent claw 16 stops the tooth 10t that is one ahead of the state of FIG. 7. With one pressing operation of the pressing button 11 like this, the disk member 10 rotates 30 degrees.

[0055] In a state where the pressing button 11 is at the innermost part and the rod portion 12 is moved to the most proximal side, the coil spring 14 is compressed between the stopper 13 at the tip of the rod portion 12, the claw member 15, and the element member 40. In this state, when the pressing force on the pressing button 11 is released, the rod portion 12 and the pressing button 11 are returned to their original positions (the state shown in FIG. 7) by the restoring force of the coil spring 14. In this process, the claw 15t is not engaged with the tooth 10t, and in combination with the presence of the detent claw 16, the disk member 10 does not rotate in the reverse direction. Also, in this process, since the claw member 15 can move (change its posture) in the inclined direction by deforming in a direction inclined with respect to the axial direction of the coil spring 14, resistance (interference) from the disk member 10 can be effectively avoided. Then, when the claw member 15 returns to its original position (the state shown in FIG. 7), it engages with the next tooth 10t of the tooth that was previously retracted by the restoring force of the coil spring 14.

[0056] As described above, the four communication holes 10h are evenly arranged at 90-degree intervals in the circumferential direction, and the back-pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are evenly arranged at 120-degree intervals in the circumferential direction. Therefore, by rotating the disk member 10 by 30 degrees at a time, a first water discharge mode in which the back-pressure chamber outflow hole 21c communicates with the outflow hole 44 and the back-pressure chamber outflow holes 22c, 23c do not communicate with the outflow holes 45, 46, a second water discharge mode in which the back-pressure chamber outflow hole 22c communicates with the outflow hole 45 and the back-pressure chamber outflow holes 21c, 23c do not communicate with the outflow holes 44, 46, and a third water discharge mode in which the back-pressure chamber outflow hole 23c communicates with the outflow hole 46 and the back-pressure chamber outflow holes 21c, 22c do not communicate with the outflow holes 44, 45 can be sequentially switched.

[0057] An example of a state where the back pressure chamber outflow hole and the outflow hole do not communicate, that is, the pilot hole of the corresponding diaphragm valve is not released, is the state on the right side of FIGS. 4 and 5. In the state on the right side of FIGS. 4 and 5, the back pressure chamber outflow holes 22c and 23c and the outflow holes 45 and 46 are blocked by the disk member 10. On the other hand, through the back pressure chamber inflow holes 22d and 23d (in the case of FIG. 4), or the gap between the tubular portions 32 and 33 and the back pressure chamber outflow holes 22c and 23c functions as the back pressure chamber inflow hole (in the case of FIG. 5), and the water pressure in the storage chamber 5 and the water pressure in the back pressure chambers 23b and 23c are equal. Therefore, due to the biasing force of a coil spring (not shown), the diaphragm valves 22 and 23 are in a closed state.

[0058] On the other hand, an example of a state where the back pressure chamber outflow hole and the outflow hole communicate, that is, the pilot hole of the corresponding diaphragm valve is released, is the state on the left side of FIGS. 4 and 5. In the state on the left side of FIGS. 4 and 5, the back pressure chamber outflow hole 21c and the outflow hole 44 are communicated (released) by the communication hole 10h of the disk member 10. In this state, water flows out from the back pressure chamber 21b through the back pressure chamber outflow hole 21c and the outflow hole 44, so that the water pressure in the storage chamber 5 becomes higher than the water pressure in the back pressure chamber 21b, and despite the biasing force of a coil spring (not shown), the diaphragm valve 21 is in an open state.

[0059] As described above, according to the shower device 1 of the present embodiment, since the communication or cutoff between each of the three flow paths and the storage chamber 5 is controlled by the three diaphragm valves 21 to 23, a significant reduction in the operating force of the flow path switching operation can be achieved.

[0060] (The three water discharge flow paths in the present embodiment) The three valve seats 41 to 43 that are opened and closed by each of the three diaphragm valves 21 to 23 communicate with the first water discharge flow path, the second water discharge flow path, and the third water discharge flow path formed by the secondary side flow path member 4 (including the four substantially disk-shaped element members 40, 47, 48, and 49 superposed as shown in FIG. 4 and the three mist flow path forming members 56 in an arc shape in plan view), respectively.

[0061] FIG. 8 is a schematic diagram for explaining three switchable water discharge channels. The valve seat 41 (see FIG. 7) communicates with the first water discharge channel through the opening in the central region (the region illustrated by hatching) of FIG. 8, and the first water discharge channel reaches the opening P (see FIG. 1) for rectified water discharge. The valve seat 43 (see FIG. 7) communicates with the third water discharge channel through the opening in the substantially reverse C-shaped region (the region illustrated by broken-line hatching) adjacent to the central region of FIG. 8 in plan view, and the third water discharge channel reaches the circular shower nozzle C and the rectangular fluid element nozzle R (see FIG. 1). The valve seat 42 (see FIG. 7) communicates with the second water discharge channel through the opening in the annular region (the region illustrated with a matte finish) adjacent to the substantially reverse C-shaped region of FIG. 8, and the second water discharge channel reaches the mist nozzle M (see FIG. 1).

[0062] As shown in FIG. 1, in the present embodiment, the opening P (φ16.1) for rectified water discharge is composed of a group of openings at the lower end side of the rectifying member 57 located at the center on the water discharge surface side, and the total area of the opening P is 203.6 mm 2 is. The mist nozzle M (φ1.05) for mist-like water discharge has 18 provided at substantially equal intervals on the circumference of φ55, and the total area is 15.6 mm 2 is. The circular shower nozzle C (first round) has 12 provided on the circumference of φ37 inside the mist nozzle M. Each of the 3 on the lower side (the pressing button side) thereof is φ0.8, and each of the remaining 9 is φ0.6. The rectangular fluid element nozzle R (1 mm × 3 mm) has 4 provided on the same circumference as the shower nozzle C inside the mist nozzle M. The shower nozzle C (second round) has 16 provided on the circumference of φ71 outside the mist nozzle M, and each of them is φ0.5. Further, 20 more shower nozzles C (third round) are provided on the circumference of φ87 outside the 16 shower nozzles C of φ0.5. Four of them on the lower side (the pressing button side) are φ1.25, and the remaining 16 are φ0.5. The total area of these shower nozzles C and the rectangular fluid element nozzles R is 27.2 mm 2 is.

[0063] And at a water discharge pressure of 0.1 MPa, the rectified water discharge amount from the opening P is 5.5 L / min, the mist-like water discharge amount from the 18 mist nozzles M is 3.9 L / min, the particle size is about 410 μm, the flow velocity is about 2.9 m / s, the water discharge amount from the 52 nozzles C and R is 5.9 L / min, the particle size is about 1500 μm, and the flow velocity is about 3.3 m / s. However, these are merely examples, and the rectified water discharge may be a continuous water discharge that does not granulate for a certain distance or more (for example, at least 10 cm or more) under the water discharge amount condition of 1.0 L / min (the water discharge from a general fluid element nozzle granulates at about 1 cm).

[0064] Referring to FIGS. 2 and 3, the shower nozzle C and the fluid element nozzle R are constituted by an element member 48. The element member 48 is made of rubber, has a low thermal conductivity, and is difficult to release heat. Further, the mist nozzle M is constituted by an element member 47. The element member 47 and the rectifying member 57 are made of resin and have a higher thermal conductivity than the element member 48.

[0065] (Details of the second water discharge passage (mist passage) in this embodiment) FIG. 9 is a perspective cross-sectional view showing a cross-section passing through the center lines of each of a pair of adjacent mist nozzles M, and FIG. 10 is a perspective cross-sectional view corresponding to FIG. 9 of the element member 47 constituting the mist nozzle M. Referring to FIGS. 8 to 10, the 18 mist nozzles M of this embodiment are divided into three groups of six each, and each group includes three pairs of mist nozzles M. And referring to FIG. 4, one mist passage forming member 56 is arranged in each group.

[0066] Furthermore, FIG. 11 is a longitudinal sectional view of the mist nozzle M in the diametrical cross-section of the shower device 1, and FIG. 12 is a perspective sectional view corresponding to FIG. 11. As shown in FIGS. 8 to 12, the hot water or water flowing through the opening of the annular region (the region shown in a satin finish) in FIG. 8 flows downward through the gap (guide channel) between the mist channel forming member 56 and the element member 47 and reaches the run-up channel 51. The run-up channel 51 extends in a plane substantially perpendicular to the water discharge direction by the mist nozzle M and is a linear channel slightly inclined with respect to the tangential direction in the circumferential direction (see particularly FIG. 8: In FIG. 8, the illustration of the mist channel forming member 56 is omitted).

[0067] Referring to FIG. 8, the right end as viewed from above the run-up channel 51 is smoothly connected via the orifice 52 to the radially outer end of the swirling chamber 53, which is a substantially cylindrical space, of the shower device. Symmetric with respect to 180° rotation, the left end as viewed from above the run-up channel 51 is smoothly connected via the orifice 52 to the radially inner end of the swirling chamber 53, which is a substantially cylindrical space, of the shower device.

[0068] Then, referring to FIGS. 9 to 12, below each swirling chamber 53, a water discharge hole 55 (mist nozzle M) is provided via the truncated conical chamber 54. As a result, the water discharge holes 55 (mist nozzles M) communicate with both the left and right sides of one run-up channel 51 to constitute a pair of mist nozzles M.

[0069] Also, referring to FIGS. 9 to 12, the upper side of the swirling chamber 53 is partitioned by the mist channel forming member 56, while the run-up channel 51, the orifice 52, the swirling chamber 53, the truncated conical chamber 54, and the water discharge hole 55 (mist nozzle M) are partitioned by the element member 47. The mist channel forming member 56 is made of a soft resin, and the large-diameter bulging portion 56a is press-fitted into the fitting hole 47a of the corresponding element member 47, whereby the swirling chamber 53 is configured to be watertight.

[0070] With the above configuration, the hot water or water flowing from the guide channel into the run-up channel 51 flows through the run-up channel 51, passes through the orifice 52, reaches the swirling chamber 53, swirls within the swirling chamber 53 and the truncated conical chamber 54, and heads towards the water discharge hole 55, and is discharged in the form of mist from the water discharge hole 55 (mist nozzle M).

[0071] An example of specific dimensions is that the width of the orifice 52 (width as viewed from the extending direction of the run-up channel 51) is 1.1 m, the height of the orifice 52 is 1.2 m, the diameter of the swirling chamber 53 is 3.3 mm, the height of the swirling chamber 53 is 1.5 mm, the height of the truncated conical chamber 54 is 1.5 mm, the height (length) of the water discharge hole 55 is 0.5 mm, and the diameter of the water discharge hole 55 is 1.05 mm.

[0072] The layout (position, shape, size, etc.) of the guide channel is configured to evenly (symmetrically) supply hot water or water to a pair of water discharge holes 55 (mist nozzles M) via the run-up channel 51 (see Fig. 13). Specifically, the guide channel of this embodiment is laid out to be located in the middle of a pair of water discharge holes 55 (mist nozzles M) in a plan view.

[0073] In this embodiment, one mist flow path forming member 56 in an arc shape in a plan view is arranged for a group of (six) water discharge holes 55 (mist nozzles M) composed of three pairs of water discharge holes 55 (mist nozzles M) (see Fig. 4). And overall, three mist flow path forming members 56 in an arc shape in a plan view are arranged for three groups of water discharge holes 55 (mist nozzles M) (see Fig. 4).

[0074] With the above layout, the second water discharge channel (mist channel) of this embodiment has a very compact occupied length in the radial direction (specifically, the inner peripheral diameter of the matte area in Fig. 8 is φ52 mm and the outer peripheral diameter is φ58 mm). As a result, the degree of freedom in the design of the first water discharge channel (rectifying channel) and the third water discharge channel (fluid element nozzle channel) is high (especially, as described above, it is possible to disperse and arrange the nozzles C and R in a relatively wide area).

[0075] Figure 14 is an L18 orthogonal array showing the relationship between the dimensions of the second water discharge channel (mist channel) and the flow rate, particle size, and flow velocity of the mist water discharge. As shown in Figure 14, when the height of the truncated conical portion is smaller than the height of the orifice (No. 1 to No. 4, No. 6 to No. 9, No. 11 to No. 18), a relatively high mist water discharge flow rate can be achieved.

[0076] More specifically, from the data shown in Figure 14, it was possible to grasp the tendency that "by shortening the truncated conical portion, the particle size can be reduced and the flow velocity can be decreased without reducing the flow rate".

[0077] In addition, each of the symbols "A", "B", and "C" in each item of Figure 14 is an example of a numerical value that a person skilled in the art can typically select. Also, the relationship between the numerical values is "A" < "B" < "C".

[0078] (Method for measuring particle size and flow velocity) Figure 15 is a schematic diagram showing a measuring device for the particle size (average particle size) and flow velocity (average flow velocity). As shown in Figure 15, the shower device 1 was fixed so that the water discharge surface was along the vertical plane, and water discharge from the mist nozzle M was carried out at a water supply pressure of 0.1 MPa. At the same time, droplets passing through a point 350 mm horizontally away from the mist nozzle M were photographed with a high-speed camera, and the average flow velocity and average particle size of the droplets were measured by analyzing a plurality of consecutive photographed images. The average particle size was set as Dv50 (cumulative 50% particle size) in the volume average diameter. The measurement results by this measurement method are the numerical values shown in the table of Figure 14.

[0079] (Method for measuring sebum removal rate) Figure 16 is a schematic diagram showing a method for measuring the sebum removal rate. 5 μL of pseudo-sebum was applied to the arm of the subject, and the shower device 1 was fixed at a height where the mist nozzle M was located 350 mm above it so that the water discharge surface was along the horizontal plane, and water discharge was carried out for 15 seconds at a water supply (hot water supply) pressure of 0.1 MPa and a hot water supply temperature of 42 °C to measure the removal rate of the pseudo-sebum.

[0080] (Relationship between flow velocity and sebum removal rate) Among the 18 types of nozzle configurations shown in Fig. 14, in the nozzle configurations of No. 1, No. 15, and No. 18, the sebum removal rate did not reach 80%. On the other hand, in the nozzle configurations of No. 2 to No. 14, No. 16, and No. 17, the sebum removal rate reached 80%. From these results, it can be said that an average mist discharge flow velocity of 2 m / s or more is a desirable condition to achieve more effective cleaning power.

[0081] (Evaluation of "skin feel": mist feeling) Furthermore, in the monitoring test by 15 subjects, for the nozzle configurations of No. 3, No. 4, No. 8, No. 9, and No. 13, the "skin feel" was perceived as poor. According to these nozzle configurations, since the average particle diameter of the discharged water droplets is larger than 460 μm, it is considered that the mist feeling is insufficient and the "skin feel" is poor.

[0082] (Evaluation of "skin feel": irritation feeling) Furthermore, in the monitoring test by 15 subjects, for the nozzle configurations of No. 4, No. 7, and No. 17, the irritation feeling was perceived as strong. According to these nozzle configurations, since the average discharge flow velocity of the water droplets is larger than 4.2 m / s, it is considered that the irritation to the skin is too strong.

[0083] (Evaluation of temperature drop) Fig. 17 is a schematic diagram showing an apparatus for evaluating the temperature drop after water discharge. As shown in Fig. 17, a thermocouple is installed at the temperature measurement location, and the shower device 1 is fixed so that the water discharge surface is along the horizontal plane at the height where the mist nozzle M is located 350 mm above it. The room temperature is set to 25°C, and water discharge is carried out at a water discharge temperature (the hot water temperature measured at the mist nozzle M) of 40°C with a water supply (hot water supply) pressure of 0.2 MPa, and the temperature at the thermocouple (temperature measurement location) is measured.

[0084] In all 18 types of nozzle configurations shown in FIG. 14, the measured temperature was 34°C or higher. As a comparative example, for a nozzle configuration where the width of the orifice 52 was 0.6 m, the height of the orifice 52 was 1.0 m, the diameter of the swirling chamber 53 was 4.0 mm, the height of the swirling chamber 53 was 1.0 mm, the height of the truncated conical chamber 54 was 3.8 mm, the height (length) of the water discharge hole 55 was 0.9 mm, and the diameter of the water discharge hole 55 was 1.4 mm, when evaluated, the measured temperature was below 34°C.

[0085] And through a monitoring test by 15 subjects, it was confirmed that the "level of temperature drop" was suitable for all 18 types of nozzle configurations shown in FIG. 14. On the other hand, for the nozzle configuration of the comparative example, it was confirmed that the "level of temperature drop" was excessive.

[0086] According to the nozzle configuration of the comparative example, the average particle diameter of the water droplets is 297 μm, which is smaller than 330 μm, so it is considered that heat is easily taken away from the surrounding air.

[0087] (Features regarding the switching operation in this embodiment) As described above, in this embodiment, by pressing the pressing button 11 (an example of a switching operation unit) once, the disk member 10 rotates 30 degrees, whereby the first water discharge mode (rectified water discharge is performed), the second water discharge mode (mist water discharge is performed), and the third water discharge mode (fluid element water discharge is performed) can be sequentially switched in this order.

[0088] That is, when switching from the first water discharge mode to the second water discharge mode, the third water discharge mode is not passed through.

[0089] Such features can also be achieved by other types of switching operation units. For example, in a mode of switching between the first water discharge mode, the second water discharge mode, and the third water discharge mode by rotating a part of the secondary side flow path member 4 by a lever operation unit, it is also possible to configure so as not to pass through the third water discharge mode when switching from the first water discharge mode to the second water discharge mode. Alternatively, even in a mode where start buttons corresponding to the first water discharge mode, the second water discharge mode, and the third water discharge mode are provided, it is possible to configure (or configure to invalidate the operation) so that the start button corresponding to the third water discharge mode cannot be operated while the first water discharge mode is being implemented.

[0090] (Features regarding the watering range in this embodiment) FIG. 15 is a schematic diagram showing the mutual positional relationship between the opening P for rectified (continuous) water discharge and the mist nozzle M for mist-like water discharge in this embodiment. FIG. 15(a) is a schematic diagram viewed from the side, and FIG. 15(b) is a schematic diagram viewed from above.

[0091] As shown in FIG. 15, in this embodiment, each second water discharge region MF (the region shown in a dotted pattern) through which the mist-like water discharge from each of the two mist nozzles M located approximately opposite passes overlaps with the first water discharge region PF (the region shown by hatching) through which the rectified water discharge from the opening P passes.

[0092] Also, the region where each second water discharge region MF overlaps with the first water discharge region PF starts (occurs) at a distance of 3 cm from the opening P of the first water discharge flow path.

[0093] And as is clear from FIG. 15 and the above description, in this embodiment, each second water discharge region MF (the region shown in a dotted pattern) through which the mist-like water discharge from each of all 18 mist nozzles M passes overlaps with the first water discharge region PF (the region shown by hatching) through which the rectified water discharge from the opening P passes.

[0094] Each second water ejection region MF may be a so-called hollow conical shape or a full conical shape.

[0095] (Summary of effective nozzle configurations (functions and effects)) Among the 18 types of nozzle configurations shown in Fig. 14, according to the nozzle configurations of No. 2 to No. 14, No. 16, and No. 17, since the average flow velocity of the water droplets ejected at a point 350 mm away from the mist nozzle (water droplets with an average particle size of 800 μm or less) is 2 m / s or more, a sebum removal rate of 80% can be achieved. That is, a more effective detergency can be provided.

[0096] Furthermore, among these nozzle configurations, according to the nozzle configurations of No. 2, No. 5, No. 6, No. 10 to No. 12, and No. 16, since the average particle size of the water droplets ejected at a point 350 mm away from the mist nozzle is 460 μm or less and the average flow velocity of the water droplets is less than 4.2 m / s, a good "skin feel" can be provided.

[0097] Also, for all 18 types of nozzle configurations shown in Fig. 14, since the average particle size of the water droplets ejected at a point 350 mm away from the mist nozzle is 330 μm or more, the "level of temperature drop" was suitable (for example, there is no need to increase the temperature setting when switching from other water ejection modes to the mist water ejection mode).

[0098] In addition, the shower device 1 of the present embodiment has nine pairs (an example of at least one pair) of mist nozzles M (water discharge holes 55) on the water discharge surface side, and a guide flow path (a gap between the mist flow path forming member 56 and the element member 47) that guides the hot water or water supplied from the water supply members 2 and 3 toward the water discharge surface side, and a run-up flow path 51 that communicates with the guide flow path and extends in a direction (an example of an intersecting direction) orthogonal to the water discharge direction by the mist nozzles M. One end side turning chamber 53, which is a substantially cylindrical space communicating with one end side of the run-up flow path 51 via one end side orifice 52, one end side water discharge hole 55 that communicates with the one end side turning chamber 53 and constitutes one of each pair of mist nozzles M, the other end side turning chamber 53, which is a substantially cylindrical space communicating with the other end side of the run-up flow path 51 via the other end side orifice 52, and the other end side water discharge hole 55 that communicates with the other end side turning chamber 53 and constitutes the other of each pair of mist nozzles M.

[0099] That is, in the shower device 1 of the present embodiment, one run-up flow path 51 is shared for mist water discharge from two (one pair) water discharge holes 55 on the one end side and the other end side. For this reason, the space utilization efficiency is high. Therefore, a larger number of mist nozzles M (water discharge holes 55) can be arranged at a higher density on the water discharge surface side.

[0100] Further, according to the shower device 1 of the present embodiment, at least a part of the guide flow path is partitioned by a mist flow path forming member 56 (an example of an upper member for forming a mist flow path), and at least a part of each of the run-up flow path 51 and a pair of turning chambers 53 (an example of one end side turning chamber and the other end side turning chamber) is partitioned by an element member 47 (an example of a lower member for forming a mist flow path). Thereby, compared with the case where all of these components 56, 51, and 53 are formed of a single member, the difficulty level of design and manufacture can be significantly reduced. Therefore, particularly when a large number of mist nozzles M (water discharge holes 55) are mounted, the degree of freedom in design and manufacture can be increased.

[0101] Further, according to the shower device 1 of the present embodiment, the mist flow path forming member 56 (an example of an upper member for forming a mist flow path) partitions the upper side of the pair of turning chambers 53 (an example of a turning chamber on one end side and a turning chamber on the other end side), and the element member 47 (an example of a lower member for forming a mist flow path) partitions the lower side of the pair of turning chambers 53 (an example of a turning chamber on one end side and a turning chamber on the other end side) and the pair of water discharge holes 55 (an example of a water discharge hole on one end side and a water discharge hole on the other end side). Thereby, the dimensional accuracy regarding the lower side of each turning chamber 53 and the corresponding water discharge hole 55 depends only on the manufacturing accuracy of the mist flow path forming member 56 and is not affected by the assembly of the mist flow path forming member 56 and the element member 47. Therefore, desired (in accordance with the design content) mist water discharge can be provided with higher accuracy.

[0102] Furthermore, according to the shower device 1 of the present embodiment, the element member 47 (an example of a lower member for forming a mist flow path) partitions a frustum cone portion 54 (a frustum cone portion on one end side and a frustum cone portion on the other end side) between the lower side of each turning chamber 53 (a turning chamber on one end side and a turning chamber on the other end side) and each water discharge hole 55 (a water discharge hole on one end side and a water discharge hole on the other end side). Also, regarding the dimensional accuracy of each frustum cone portion 54, it depends only on the manufacturing accuracy of the element member 47 and is not affected by the assembly of the mist flow path forming member 56 and the element member 47. Therefore, desired (in accordance with the design content) mist water discharge can be provided with higher accuracy.

[0103] Also, according to the shower device 1 of the present embodiment, the large-diameter bulging portion 56a of the mist flow path forming member 56 is press-fitted into the fitting hole 47a of the corresponding element member 47 (that is, the mist flow path forming member 56 and the element member 47 are assembled by fitting), so that the turning chamber 53 is relatively easily configured to be watertight.

[0104] Further, according to the shower device 1 of the present embodiment, nine pairs (an example of at least one pair) of mist nozzles M (water discharge holes 55) are dispersedly arranged in the circumferential direction on the same circumference, and the acceleration flow path 51 is a linear flow path slightly inclined with respect to the tangential direction of the circumferential direction. Thereby, since a plurality of (all) acceleration flow paths 51 can be arranged generally along the circumferential direction, the occupied length in the radial direction can be made very compact. Thereby, a larger number of mist nozzles M (water discharge holes 55) can be arranged at a higher density.

[0105] Furthermore, according to the shower device 1 of the present embodiment, with respect to the acceleration flow path 51, a pair of swirling chambers 53 (one-end swirling chamber and the other-end swirling chamber) are laid out in a relationship of 180° rotational symmetry in a plan view. Thereby, the design of uniformly (symmetrically) supplying hot water or water to a pair of mist nozzles M (water discharge holes 55) via the acceleration flow path 51 can be facilitated.

[0106] Note that the invention of the present application includes the following features (inventions). [Feature 1] A shower device having a plurality of mist nozzles on the water discharge surface side, When discharging water from the mist nozzle under a water supply pressure of 0.1 MPa, at a point 350 mm away from the mist nozzle, the average flow velocity of the discharged water droplets is 2 m / s or more A shower device characterized by this. [Feature 2] When discharging water from the mist nozzle under a water supply pressure of 0.1 MPa, at a point 350 mm away from the mist nozzle, the average particle diameter of the discharged water droplets is 460 μm or less, The average flow velocity is 4.2 m / s or less The shower device according to Feature 1, characterized by this. [Feature 3] The average particle diameter is 330 μm or more The shower device according to Feature 1 or 2, characterized by this. [Feature 4] The plurality of mist nozzles include at least one pair of mist nozzles, The shower device is A guide flow path that guides hot water or water supplied from a water supply member toward the water discharge surface side, a run-up flow path that communicates with the guide flow path and extends in a direction intersecting the water discharge direction by the at least one pair of mist nozzles, a one-end side swirling chamber, which is a substantially cylindrical space, communicating with one end side of the run-up flow path via a one-end side orifice, a one-end side water discharge hole that communicates with the one-end side swirling chamber and constitutes one of each pair of mist nozzles, a other-end side swirling chamber, which is a substantially cylindrical space, communicating with the other end side of the run-up flow path via a other-end side orifice, a other-end side water discharge hole that communicates with the other-end side swirling chamber and constitutes the other of each pair of mist nozzles, and the shower device according to any one of Features 1 to 3, characterized by comprising the above. [Feature 5] At least a part of the guide flow path is partitioned by an upper member for forming a mist flow path, and at least a part of each of the run-up flow path, the one-end side swirling chamber, and the other-end side swirling chamber is partitioned by a lower member for forming a mist flow path. The shower device according to Feature 4, characterized by the above. [Feature 6] The upper member for forming a mist flow path also partitions the upper side of the one-end side swirling chamber and the upper side of the other-end side swirling chamber, and the lower member for forming a mist flow path partitions the lower side of the one-end side swirling chamber, the one-end side water discharge hole, the lower side of the other-end side swirling chamber, and the other-end side water discharge hole. The shower device according to Feature 5, characterized by the above. [Feature 7] The lower member for forming a mist flow path partitions a one-end side truncated conical portion between the lower side of the one-end side swirling chamber and the one-end side water discharge hole, and partitions a other-end side truncated conical portion between the lower side of the other-end side swirling chamber and the other-end side water discharge hole. The shower device according to Feature 6, characterized by the above. [Feature 8] The one-end-side truncated conical portion and the other-end-side truncated conical portion have the same height as each other. The one-end-side orifice and the other-end-side orifice have the same height as each other, and have a height greater than the height of the one-end-side truncated conical portion and the other-end-side truncated conical portion. The shower device according to Feature 7, characterized in that. [Feature 9] The auxiliary flow path extends in a direction substantially perpendicular to the water discharge direction by the mist nozzle. The shower device according to any one of Features 4 to 8, characterized in that. [Feature 10] The at least one pair of mist nozzles includes a plurality of pairs of mist nozzles that are circumferentially dispersed on substantially the same circumference. The auxiliary flow path is a linear flow path that is slightly inclined with respect to the tangential direction in the circumferential direction. The shower device according to Feature 9, characterized in that. [Feature 11] Regarding the auxiliary flow path, the one-end-side swirling chamber and the other-end-side swirling chamber are laid out in a rotationally symmetric relationship of 180° in a plan view. The shower device according to any one of Features 4 to 10, characterized in that.

Explanation of Signs

[0107] 1 Shower device 2 Water supply member 3 Water supply member 4 Secondary-side flow path member 5 Storage chamber 7 Shower head housing 8 Cover member 10 Disk member 10h Communication hole 10t Teeth 11 Push button 11a Contact slide inclined portion 11s Rotation shaft 12 Rod portion 12a Contact ring 12s Seal ring member 13 Stopper 14 Coil spring 15 Claw member 15t Claw 16 Stop claw 17 Stop claw fixing part 20 Diaphragm member 21 Diaphragm valve 21b Back pressure chamber 21c Back pressure chamber outflow hole 21d Back pressure chamber inflow hole 22 Diaphragm valve 22b Back pressure chamber 22c Back pressure chamber outflow hole 22d Back pressure chamber inflow hole 23 Diaphragm valve 23b Back pressure chamber 23c Back pressure chamber outflow hole 23d Back pressure chamber inflow hole 24 Seal ring part 30 Disk pressing member 31 Tubular part 31c Outflow connection passage 32 Tubular part 32c Outflow connection passage 33 Tubular part 33c Outflow connection passage 35 Coil spring 38 Space member 40 Element member 40a Upper edge part 41 Valve seat 42 Valve seat 43 Valve seat 44 Outflow hole 45 Outflow hole 46 Outflow hole 47 Element member 47a Fitting hole 48 Element member 49 Element member 51 Run-up flow path 52 Orifice 53 Swirl chamber 54 Truncated cone chamber 55 Water discharge hole (mist nozzle) 56 Mist flow path forming member 56a Large diameter bulging part 57 Rectifying member P opening PF First water discharge area M Mist nozzle MF Second water discharge area C Circular shower nozzle R Rectangular fluid element nozzle

Claims

1. A shower device having a plurality of mist nozzles on the water discharge surface side, when discharging water from the mist nozzles under a water supply pressure of 0.1 MPa, at a point 350 mm away from the mist nozzles, the average flow velocity of the discharged water droplets is 2 m / s or more The shower device is characterized by this.

2. when discharging water from the mist nozzles under a water supply pressure of 0.1 MPa, at a point 350 mm away from the mist nozzles, the average particle diameter of the discharged water droplets is 460 μm or less, and the average flow velocity is 4.2 m / s or less The shower device according to claim 1, characterized by this.

3. The average particle diameter is 330 μm or more The shower device according to claim 2, characterized by this.

4. The plurality of mist nozzles includes at least one pair of mist nozzles, and the shower device a guide flow path for guiding the hot water or water supplied from the water supply member toward the water discharge surface side, a boost flow path that communicates with the guide flow path and extends in a direction intersecting the water discharge direction by the at least one pair of mist nozzles, a one - end side swirling chamber, which is a substantially cylindrical space, communicating with one - end side of the boost flow path via a one - end side orifice, a one - end side water discharge hole that communicates with the one - end side swirling chamber and constitutes one of each pair of mist nozzles, a the other - end side swirling chamber, which is a substantially cylindrical space, communicating with the other - end side of the boost flow path via a the other - end side orifice, a the other - end side water discharge hole that communicates with the other - end side swirling chamber and constitutes the other of each pair of mist nozzles, The shower device according to any one of claims 1 to 3, characterized by comprising these.

5. At least a part of the guide flow path is partitioned by a mist flow path forming upper member, At least a part of each of the pre-run channel, the one-end-side swirling chamber, and the other-end-side swirling chamber is partitioned by a mist channel forming lower member. The shower device according to claim 4, characterized in that.

6. The mist channel forming upper member also partitions the upper sides of the one-end-side swirling chamber and the other-end-side swirling chamber. The mist channel forming lower member partitions the lower side of the one-end-side swirling chamber, the one-end-side water discharge hole, the lower side of the other-end-side swirling chamber, and the other-end-side water discharge hole. The shower device according to claim 5, characterized in that.

7. The mist channel forming lower member partitions a one-end-side truncated conical portion between the lower side of the one-end-side swirling chamber and the one-end-side water discharge hole, and partitions a other-end-side truncated conical portion between the lower side of the other-end-side swirling chamber and the other-end-side water discharge hole. The shower device according to claim 6, characterized in that.

8. The one-end-side truncated conical portion and the other-end-side truncated conical portion have the same height as each other. The one-end-side orifice and the other-end-side orifice are at the same height as each other and have a height greater than the height of the one-end-side truncated conical portion and the other-end-side truncated conical portion. The shower device according to claim 7, characterized in that.

9. The pre-run channel extends in a direction substantially perpendicular to the water discharge direction by the mist nozzle. The shower device according to claim 8, characterized in that.

10. The at least one pair of mist nozzles includes a plurality of pairs of mist nozzles that are circumferentially dispersed on a substantially same circumference. The pre-run channel is a linear channel that is slightly inclined with respect to the tangential direction in the circumferential direction. The shower device according to claim 9, characterized in that.

11. Regarding the approach flow path, the one-end-side swirling chamber and the other-end-side swirling chamber are laid out in a relationship of 180° rotational symmetry in a plan view. The shower device according to claim 10, characterized in that.

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