Shower device

Abstract

The invention provides a shower device capable of realizing more effective washing power. The present invention is a shower device having a plurality of water mist nozzles on the water discharge surface side, and is characterized in that when water is discharged from the water mist nozzles at a water supply pressure of 0.1 MPa, the average flow velocity of discharged water droplets at a location 350 mm away from the water mist nozzles is 2 m / s or more.

Description

Technical Field

[0001] The present invention relates to a shower device which utilizes water spraying with a fine particle diameter, namely, water mist spraying. Background Art

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

[0003] Shower devices that use water mist spray are less irritating to the skin and have a high rate of removing sebum. Therefore, they are excellent for face washing.

[0004] Such characteristics are due to the characteristics of water mist discharge, that is, compared with the usual spray discharge, the water droplets are finer, the number of water droplets is greater, and the water droplet distribution is more uniform.

[0005] To explain in more detail, in normal showering, large water droplets randomly hit dirt, while in misting, a large number of small water droplets evenly hit dirt. Thus, misting can achieve both better skin feel and higher cleaning power.

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

[0007] Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2022-013839 Summary of the invention

[0008] As described above, the mist spouting can achieve a higher cleaning power than the normal shower spouting.

[0009] The inventors of the present case studied the average flow rate of the water mist spray measured by the average flow rate measurement method described below and found that in order to achieve more effective cleaning power, a necessary condition is that the average flow rate of the water mist spray is 2 m / s or more.

[0010] The present invention has been completed based on such knowledge. An object of the present invention is to provide a shower device that can achieve more effective washing power.

[0011] The present invention is a shower device having a plurality of water mist nozzles on a water spouting surface side, wherein when water is spouted from the water mist nozzles at a water supply pressure of 0.1 MPa, an average flow velocity of the spouted water droplets at a location 350 mm away from the water mist nozzles is greater than 2 m / s.

[0012] According to the present invention, a sebum removal rate of 80% can be achieved as measured by the sebum removal rate measuring method described later.

[0013] In the present invention, further preferred conditions from the perspective of "skin touch" are: (1) when water is sprayed from the water mist nozzle under a water supply pressure of 0.1 MPa, the average particle size of the sprayed water droplets is less than 460 μm at a point 350 mm away from the water mist nozzle, and (2) the average flow rate is less than 4.2 m / s.

[0014] Through follow-up tests on 15 subjects, it was confirmed that when these conditions are met, the "skin feel" is good. If the average particle size of the spray water droplets is greater than 460μm, the spray feeling may be insufficient and the "skin feel" may not be good. On the other hand, if the average flow rate is greater than 4.2m / s, the irritation to the skin is too strong.

[0015] In the present invention, from the viewpoint of minimizing the temperature drop after water spouting, a preferred condition is that the average particle size is 330 μm or more (if the temperature drop after water spouting is large, the temperature setting needs to be changed when switching the water spouting mode, which deteriorates the usability).

[0016] Through follow-up tests on 15 subjects, it was confirmed that when such conditions were met, the "level of temperature drop" was good.

[0017] Furthermore, as a structure of a water mist nozzle that satisfies each of the above conditions, the inventor of the present case has developed the following shower device. That is, the plurality of water mist nozzles include at least one pair of water mist nozzles, and the shower device comprises: a guide flow path that guides the hot water or cold water supplied from the water supply member toward the water spouting surface; a flow-assisting flow path that is connected to the guide flow path and extends in a direction that intersects with the water spouting direction of the at least one pair of water mist nozzles; a roughly cylindrical space, i.e., a swirl chamber at one end side, connected to one end side of the flow-assisting flow path through a small hole at one end side; a water spouting hole at one end side, connected to the swirl chamber at one end side to constitute one side of each pair of water mist nozzles; a roughly cylindrical space, i.e., a swirl chamber at the other end side, connected to the other end side of the flow-assisting flow path through a small hole at the other end side; and a water spouting hole at the other end side, connected to the swirl chamber at the other end side to constitute the other side of each pair of water mist nozzles.

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

[0019] At this time, it is preferred that at least a portion of the guide flow path is further divided by an upper member forming a water mist flow path, and at least a portion of each of the flow-assisting flow path, the one end side swirl chamber, and the other end side swirl chamber is divided by a lower member forming a water mist flow path.

[0020] Thus, the difficulty of design and manufacturing can be significantly reduced compared to when all components are constituted by a single member. Therefore, the degree of freedom in design and manufacturing can be increased, especially when a large number of water mist nozzles are mounted.

[0021] In addition, at this time, it is preferred that the water mist flow path forming upper side component also divides the upper side of the vortex chamber on the one end side and the upper side of the vortex chamber on the other end side, and the water mist flow path forming lower side component divides the lower side of the vortex chamber on the one end side, the one end side water ejection hole, the lower side of the vortex chamber on the other end side and the other end side water ejection hole.

[0022] Therefore, the dimensional accuracy of the water spouting holes corresponding to the lower side of each swirl chamber depends only on the manufacturing accuracy of the lower side member forming the water mist flow path, and is not affected by the assembly of the upper side member forming the water mist flow path and the lower side member forming the water mist flow path. Therefore, the desired (designed) water mist spouting can be provided with higher accuracy.

[0023] Moreover, at this time, it is preferred that the water mist flow path forming lower side component divides one end side flat-top cone portion between the lower side of the one end side swirl chamber and the one end side water ejection hole, and divides the other end side flat-top cone portion between the lower side of the other end side swirl chamber and the other end side water ejection hole.

[0024] Therefore, even the dimensional accuracy related to each truncated cone portion depends only on the manufacturing accuracy of the lower member forming the water mist flow path, and is not affected by the assembly of the upper member forming the water mist flow path and the lower member forming the water mist flow path. Therefore, the desired (designed) water mist spouting can be provided with higher accuracy.

[0025] Moreover, at this time, it is preferred that the flat-headed conical portion on one end side and the flat-headed conical portion on the other end side have the same height, and the small hole on one end side and the small hole on the other end side have the same height and a height greater than the heights of the flat-headed conical portion on one end side and the flat-headed conical portion on the other end side.

[0026] This makes it possible to relatively easily achieve a higher water mist discharge flow rate.

[0027] In addition, at this time, the flow-assisting flow path is provided in order to give the hot water or the cold water a movement amount for the hot water or the cold water to swirl in the swirl chamber in advance. Therefore, the flow-assisting flow path is preferably provided in the swirl chamber along the swirl direction, that is, preferably extends in a direction substantially perpendicular to the water discharge direction of the water mist nozzle. The substantially perpendicular direction is a direction including a range of about ±30° relative to a strictly perpendicular direction.

[0028] Furthermore, when the at least one pair of water mist nozzles includes a plurality of pairs of water mist nozzles dispersedly arranged in the circumferential direction of substantially the same circle, the flow-aiding flow path is preferably a straight flow path slightly inclined relative to the tangential direction of the circumferential direction. Thus, since a plurality of (all) flow-aiding flow paths can be arranged substantially along the circumferential direction, the occupied length in the radial direction can be accommodated very compactly. Thus, a larger number of water mist nozzles can be arranged at a higher density.

[0029] Furthermore, regarding the flow-assisting flow path, when viewed from above, the one-end swirl chamber and the other-end swirl chamber are preferably arranged in a 180° rotationally symmetrical relationship. This facilitates the design of evenly (symmetrically) supplying hot water or cold water to a pair of water mist nozzles via the flow-assisting flow path.

[0030] According to the present invention, a sebum removal rate of 80% can be achieved as measured by the sebum removal rate measuring method described later. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic perspective view showing a shower device according to an embodiment of the present invention. Figure 2 It is a longitudinal sectional view of the shower device of this embodiment. Figure 3 It is a partially cutaway perspective view of the shower device according to the present embodiment. Figure 4 It is an exploded perspective view of the shower device according to this embodiment. Figure 5 This is a schematic diagram for explaining the opening and closing of the pilot hole. Figure 6 It is a schematic diagram for explaining the disk pressing member. Figure 7 It is a schematic diagram for explaining the rotation of the disk member. Figure 8 This is a schematic diagram for explaining the three water jetting flow paths that are switched. Fig. 9 It is a sectional perspective view showing a cross section passing through each center line of a pair of adjacent water mist nozzles. Fig.10 It is the main component of the water mist nozzle. Fig. 9 A sectional perspective view of . Fig.11 This is a longitudinal sectional view of the mist nozzle in the radial direction cross section of the shower device according to the present embodiment. Fig.12 is corresponding to Fig.11 A sectional perspective view of . Fig.13 This is a schematic diagram showing the water jetting state from a pair of adjacent water mist nozzles. Fig.14 This is a table showing the relationship between the dimension examples of the second jetting flow path and the flow rate, particle diameter, and flow velocity of the mist jetting water. Fig.15 It is a schematic diagram showing a device for measuring a particle size (average particle size) and a flow velocity (average flow velocity). Fig.16 It is a schematic diagram which shows the measuring method of sebum removal rate. Fig.17 This is a schematic diagram showing a device for evaluating the temperature drop after water discharge. Fig.18 This is a schematic diagram showing the relative positional relationship between an opening for continuous water jetting and a mist nozzle for mist water jetting in the shower device of the present embodiment. Explanation of symbols 1-shower device; 2-water supply member; 3-water supply member; 4-secondary side flow path member; 5-storage chamber; 7-shower head frame; 8-cover member; 10-disc member; 10h-communication hole; 10t-tooth; 11-press button; 11a-abutment sliding inclined portion; 11s-rotation shaft; 12-rod portion; 12a-abutment ring; 12s-sealing ring member; 13-stopper; 14-coil spring; 15-claw structure 15t-claw; 16-ratchet; 17-ratchet fixing portion; 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- Sealing ring; 30-disc pressing member; 31-tubular portion; 31c-outflow communication passage; 32-tubular portion; 32c-outflow communication passage; 33-tubular portion; 33c-outflow communication passage; 35-coil spring; 38-spacer member; 40-main member; 40a-upper edge; 41-valve seat; 42-valve seat; 43-valve seat; 44-outflow hole; 45-outflow hole; 46-outflow hole; 47-main member; 47a -Matching hole; 48-main component; 49-main component; 51-flow-assisting flow path; 52-small hole; 53-vortex chamber; 54-flat-headed conical chamber; 55-water discharge hole (water mist nozzle); 56-water mist flow path forming component; 56a-large diameter bulge; 57-rectifying component; P-opening; PF-first water discharge area; M-water mist nozzle; MF-second water discharge area; C-circular spray nozzle; R-rectangular fluid element nozzle. DETAILED DESCRIPTION

[0032] Basic structure Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The shower device of the present embodiment is a shower device that can switch between a plurality of water jetting modes (can perform water jetting in a plurality of water jetting modes).

[0033] Figure 1 1 is a schematic perspective view showing a shower device 1 according to the present embodiment. Figure 2 is a longitudinal sectional view of the shower device 1 according to this embodiment. Figure 3 is a partially cutaway perspective view of the shower device 1 according to this embodiment. Figure 4 : is an exploded perspective view of the shower device 1 of this embodiment. Figure 5 This is a schematic diagram for explaining the opening and closing of the pilot hole. Figure 6 It is a schematic diagram for explaining the disk pressing member.

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

[0035] A secondary flow path member 4 composed of four substantially disk-shaped main members 40, 47, 48, and 49 is provided on the water discharge surface side of the shower device 1 relative to the storage chamber 5. The secondary flow path member 4 has three (one example of a plurality) water discharge flow paths corresponding to three (one example of a plurality) water discharge modes.

[0036] See also Figures 4 to 6 In the secondary side flow path member 4, on the main member 40 facing the storage chamber 5, three valve seats 41 to 43 are formed which bulge toward the storage chamber 5 side, and a communication hole connected to the corresponding flow path is provided at the center of each valve seat 41 to 43. The three valve seats 41 to 43 (and the corresponding flow paths) are evenly arranged at 120 degrees in the circumferential direction in an annular shape.

[0037] The diaphragm valves 21 to 23 are provided in an annular shape so as to correspond to the three valve seats 41 to 43 , respectively. The three diaphragm valves 21 to 23 are formed integrally with the diaphragm member 20 as one part, but each of the diaphragm valves 21 to 23 can be independently operated.

[0038] A seal ring 24 is formed on the outer periphery of the diaphragm member 20. The seal ring 24 is watertightly sandwiched by the upper edge 40a of the main member 40 and the cover member 8. On the other hand, the center region of the diaphragm member 20 is supported on the upper surface of the main member 40 via the spacer member 38.

[0039] In addition, coil springs (not shown) are provided between the diaphragm valves 21 to 23 and the lower surface of the cover member 8 , respectively, and the diaphragm valves 21 to 23 are biased in the blocking direction by the coil springs.

[0040] In addition, the three diaphragm valves 21 to 23 of the present embodiment are arranged in a ring shape, and the pilot holes (part of which are the back pressure chamber outflow holes 21c to 23c formed on the lower side of the cover member 8) for connecting the back pressure chambers 21b to 23b of each diaphragm valve 21 to 23 with the outer space of the storage chamber 5, that is, the space below the main member 40, are concentrated in the center side area where the three diaphragm valves 21 to 23 are arranged, and are opened and closed by the disc member 10 that functions as a common pilot valve. (When there are two diaphragm valves, the pilot holes for connecting the back pressure chambers of each diaphragm valve with the outer space of the storage chamber 5, that is, the space below the main member 40, can be concentrated in the area on the middle side where the two diaphragm valves are arranged.)

[0041] The disk member 10 is made of resin, supported so as to be rotatable about its own rotation axis, and has 12 teeth 10t (also refer to the following) on ​​the outer periphery. Figure 7 ).

[0042] Especially refer to Figure 4 The disc member 10 has four (an example of a plurality) communicating holes 10h, and the four communicating holes 10h are selectively connected to the back pressure chamber outflow holes 21c to 23c provided in the back pressure chambers 21b to 23b of the diaphragm valves 21 to 23 in accordance with the rotational position of the disc member 10, thereby opening the pilot holes of the diaphragm valves 21 to 23. More specifically, when the back pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 provided on the main member 40 in a manner corresponding to the back pressure chamber outflow holes 21c to 23c are selectively connected by the communicating holes 10h of the disc member 10, the pilot holes of the diaphragm valves 21 to 23 are opened. The four communicating holes 10h are evenly arranged at 90 degrees 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 degrees in the circumferential direction.

[0043] Next, refer especially to Figure 5 The disk pressing member 30 is located between the back pressure chamber outflow holes 21c to 23c and the disk member 10, and is pressed against the disk member 10 by the coil spring 35 in a direction away from the back pressure chamber outflow holes 21c to 23c (toward the main member 40).

[0044] In addition, the disk pressing member 30 is provided with outflow communication passages 31c to 33c that are connected to the back pressure chamber outflow holes 21c to 23c of each diaphragm valve 21 to 23. In the present embodiment, the outflow communication passages 31c to 33c are respectively composed of tubular portions 31 to 33, and each tubular portion 31 to 33 is inserted into the corresponding back pressure chamber outflow hole 21c to 23c. Moreover, there is a gap remaining between each tubular portion 31 to 33 and the back pressure chamber outflow hole 21c to 23c, and the gap functions as the back pressure chamber inflow hole. Or, as Figure 4As shown in FIG. 1 , a configuration may be adopted in which the back pressure chamber inflow holes 21 d to 23 d are provided in a part of the diaphragm valves 21 to 23 .

[0045] return Figures 1 to 3 A push button 11 is provided at the lower part of the shower head frame 7 as a switching operation part for the user to apply an operating force. (Instead of the push button 11, other types of buttons or sliding switches may also be provided.)

[0046] Each time the user performs a pressing operation (each time the user applies a pressing force as an operating force), the push button 11 rotates around the rotation axis 11s. In conjunction with the rotation of the push button 11, the push button 11 is pressed by the contact sliding inclined portion 11a (see Figure 4 ) and the contact ring 12a (see Figure 4 ) abuts (and slides) against the rod 12, and the rod 12 reciprocates in its own axial direction.

[0047] The tip of the rod 12 is exposed in the storage chamber 5 (in the water) (see Figure 6 ), which is made of a metal rod such as stainless steel having the property of not rusting. In this embodiment, the rod portion 12 can slide through the main component 40 which is fixed integrally to the shower head frame 7. In order to maintain watertightness, a sealing ring component 12s (see Figure 4 ). The rod portion 12 may be made not only of a rigid body but also of a plastic body such as a string or an elastic body such as rubber.

[0048] Figure 7 1 is a schematic diagram for explaining the rotation of the disk member 10. Figure 7 As shown, a coil spring 14 is disposed around the tip of the rod 12 located in the storage chamber 5. The base end of the coil spring 14 is fixed to the main member 40, thereby being fixed to the shower head frame 7 (rotation shaft 11s of the push button 11).

[0049] A claw member 15 is fixed at the top end of the coil spring 14, and a stopper 13 for the claw member 15 is installed at the top end of the rod portion 12. Through the deformation of the coil spring 14 in the axial direction, the top end of the coil spring 14 and the claw member 15 can move relative to the stopper 13 in the axial direction in the area on the root end side of the rod portion 12.

[0050] Furthermore, the tip of the coil spring 14 and the claw member 15 can be deformed in a direction inclined with respect to the axial direction of the coil spring 14 and can move in the inclined direction (can change their posture).

[0051] The claw member 15 is provided with a claw 15t that engages with the teeth 10t of the disc member 10 on the side surface of the claw member 15 on the disc member 10. When the rod 12 moves, the claw 15t engages with the teeth 10t, so that the disc member 10 rotates.

[0052] In addition, the pawl 16 is held by the pawl fixing portion 17 provided on the main member 40 , and the pawl 16 prevents the disk member 10 (teeth 10 t ) from rotating in the reverse direction.

[0053] The role of basic structure When the user presses the push button 11, the contact sliding inclined portion 11a of the push button 11 rotates around the rotation axis 11s due to the pressing force (operation force), and the rod portion 12 moves toward the root end side in the axial direction via the contact ring 12a.

[0054] Figure 7 The state corresponds to the state before the pressing operation. If the rod 12 starts to move from this state, the claw 15t of the claw member 15 will be attracted by the teeth 10t of the disk member 10, so that the disk member 10 rotates. When the push button 11 is located at the innermost part and the rod 12 moves to the root end, the pawl 16 is in contact with the tooth 10t of the disk member 10. Figure 7 The state is stopped compared to the tooth 10t one before. By such a single pressing operation of the push button 11, the disk member 10 rotates 30 degrees.

[0055] When the push button 11 is located at the innermost part and the rod 12 is moved to the root end, the coil spring 14 is compressed between the stopper 13 and the claw member 15 at the tip of the rod 12 and the main member 40. If the pressing force on the push button 11 is released in this state, the rod 12 and the push button 11 return to their original positions due to the restoring force of the coil spring 14 ( Figure 7 During this process, the claw 15t does not engage with the tooth 10t, and the disc member 10 does not reverse due to the existence of the ratchet 16. In addition, during this process, the claw member 15 can also move in the inclined direction (possessing a change of posture) due to deformation in the direction inclined relative to the axial direction of the coil spring 14, thereby effectively avoiding the resistance (interference) from the disc member 10. Furthermore, if the claw member 15 returns to its original position ( Figure 7 state), the restoring force of the coil spring 14 causes the tooth 10t next to the tooth introduced last time to engage with the tooth 10t next to the tooth introduced last time.

[0056] As described above, four communication holes 10h are evenly arranged at 90 degrees 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 degrees in the circumferential direction. Therefore, by rotating the disc member 10 by 30 degrees, the first water jetting mode in which the back pressure chamber outflow hole 21c is connected to the outflow hole 44 and the back pressure chamber outflow holes 22c and 23c are not connected to the outflow holes 45 and 46, the second water jetting mode in which the back pressure chamber outflow hole 22c is connected to the outflow hole 45 and the back pressure chamber outflow holes 21c and 23c are not connected to the outflow holes 44 and 46, and the third water jetting mode in which the back pressure chamber outflow hole 23c is connected to the outflow hole 46 and the back pressure chamber outflow holes 21c and 22c are not connected to the outflow holes 44 and 45.

[0057] Figure 4 and Figure 5 The state on the right side is an example of a state where the back pressure chamber outflow hole is not connected to the outflow hole, that is, an example of a state where the pilot hole of the corresponding diaphragm valve is not open. Figure 4 and Figure 5 In the state on the right side of the back pressure chamber, the back pressure chamber outflow holes 22c, 23c and the outflow holes 45, 46 are blocked by the disk member 10. On the other hand, the back pressure chamber inflow holes 22d, 23d ( Figure 4 ) or the gaps between the tubular portions 32, 33 and the back pressure chamber outflow holes 22c, 23c function as back pressure chamber inflow holes ( Figure 5 ), the water pressure in the storage chamber 5 becomes equal to the water pressure in the back pressure chambers 23b and 23c. Thus, the diaphragm valves 22 and 23 are in a blocked state due to the biasing force of the coil spring (not shown).

[0058] on the other hand, Figure 4 and Figure 5 The state on the left side is an example of a state where the outflow hole of the back pressure chamber is connected to the outflow hole, that is, an example of a state where the pilot hole of the corresponding diaphragm valve is opened. Figure 4 and Figure 5 In the state on the left side of the back pressure chamber, the back pressure chamber outflow hole 21c and the outflow hole 44 are connected (opened) by the communication hole 10h of the disc 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 the water pressure in the storage chamber 5 is greater than the water pressure in the back pressure chamber 21b. Although the diaphragm valve 21 is urged by the coil spring (not shown), it is still in an open state.

[0059] As described above, according to the shower device 1 of this embodiment, the three diaphragm valves 21 to 23 control the communication or interruption between the three flow paths and the storage chamber 5 , so that the operation force for switching the flow paths can be significantly reduced.

[0060] Three water jetting channels in this embodiment The three valve seats 41 to 43 opened and closed by the three diaphragm valves 21 to 23 are connected to the secondary side flow path member 4 (such as Figure 4 As shown, the first water jetting flow path, the second water jetting flow path and the third water jetting flow path are formed by four overlapping roughly circular plate-shaped main components 40, 47, 48, 49 and three water mist flow path forming components 56 that are arc-shaped when viewed from above.

[0061] Figure 8 Schematic diagram for explaining the three water jetting channels that are switched. Figure 7 ) Figure 8 The opening of the central region (the region shown in the hatching) of the first jetting water flow path is connected to the first jetting water flow path, and the first jetting water flow path reaches the opening P for jetting water in a rectified state (see Figure 1 ). Valve seat 43 (refer to Figure 7 ) by being adjacent to Figure 8 The opening of the central region of the substantially inverted C-shaped region (the region shown in dashed cross-section) when viewed from above is connected to the third water jetting flow path, which reaches the circular spray nozzle C and the rectangular fluid element nozzle R (see Figure 1 ). Valve seat 42 (refer to Figure 7 ) Figure 8 The opening of the annular region (the region shown in the pear skin pattern) adjacent to the substantially inverted C-shaped region is connected to the second water jetting flow path, and the second water jetting flow path reaches the water mist nozzle M (refer to Figure 1 ).

[0062] like Figure 1 As shown, in this embodiment, the opening P (φ16.1) for jetting water in a rectified manner is composed of a group of openings on the lower end side of the rectifying member 57 located in the center of the jetting surface side, and the total area of ​​the opening P is 203.6 mm 2 . On the circumference of φ55, 18 water mist nozzles M (φ1.05) for spraying water are arranged at roughly equal intervals, with a total area of ​​15.6mm 2. On the circumference of φ37 on the inner side of the water mist nozzle M, there are 12 circular spray nozzles C (first circle), of which 3 on the lower side (on the push button side) are φ0.8 each, and the remaining 9 are φ0.6 each. On the same circumference as the spray nozzle C on the inner side of the water mist nozzle M, there are 4 rectangular fluid element nozzles R (1mm×3mm). Moreover, on the circumference of φ71 on the outer side of the water mist nozzle M, there are 16 spray nozzles C (second circle), of which φ0.5 each. On the circumference of φ87 closer to the outside than the 16 spray nozzles C (second circle) of φ0.5, there are 20 spray nozzles C (third circle), of which 4 on the lower side (on the push button side) are φ1.25, and the remaining 16 are φ0.5. The total area of ​​these spray nozzles C and the rectangular fluid element nozzles R is 27.2mm 2 .

[0063] Moreover, at a water discharge pressure of 0.1 MPa, the rectified water discharge volume from the opening P is 5.5 L / min, the mist water discharge volume from the 18 water mist nozzles M is 3.9 L / min, the particle size is about 410 μm, the flow rate is about 2.9 m / s, and the water discharge volume from the 52 nozzles C and R is 5.9 L / min, the particle size is about 1500 μm, and the flow rate is about 3.3 m / s. Of course, these are just simple examples, and the rectified water discharge can be continuous water discharge that does not granulate over a certain distance (for example, at least 10 cm) under the condition of a water discharge volume of 1.0 L / min (the water discharged from the ordinary fluid element nozzle will granulate at about 1 cm).

[0064] Reference Figure 2 and Figure 3 The spray nozzle C and the fluid element nozzle R are composed of the main component 48, which is made of rubber, has a low thermal conductivity and is not easy to dissipate heat. In addition, the water mist nozzle M is composed of the main component 47, and the main component 47 and the rectifying component 57 are made of resin, which have a higher thermal conductivity than the main component 48.

[0065] Details of the second water jetting flow path (water mist flow path) in this embodiment Fig. 9 1 is a sectional perspective view showing a cross section passing through the center lines of each of a pair of adjacent water mist nozzles M. Fig.10 The main component 47 of the water mist nozzle M corresponds to Fig. 9 See the sectional view of Figures 8 to 10 , the 18 water mist nozzles M of this embodiment are arranged in 3 groups of 6 each, and each group includes 3 pairs of water mist nozzles M. Also, refer to Figure 4 A water mist flow path forming component 56 is arranged in each group.

[0066] and, Fig.11 is a longitudinal sectional view of the water mist nozzle M in the diameter direction section of the shower device 1, Fig.12 is corresponding to Fig.11 A sectional view of a Figures 8 to 12 As shown, by Figure 8 The hot water or cold water flowing through the opening of the annular region (the region shown in the figure in the shape of pear skin) flows downward in the gap (guide flow path) between the water mist flow path forming member 56 and the main member 47, and reaches the flow-assisting flow path 51. The flow-assisting flow path 51 is a straight flow path extending in a plane substantially perpendicular to the water spouting direction of the water mist nozzle M and slightly inclined with respect to the tangential direction of the circumferential direction (see in particular Figure 8 , Figure 8 The illustration of the water mist flow path forming component 56 is omitted).

[0067] Reference Figure 8 The right end of the flow-assisting flow path 51 as viewed from above is smoothly connected to the end of the swirl chamber 53, which is a roughly cylindrical space, on the radial outside of the shower device, through the small hole 52. With 180° rotational symmetry, the left end of the flow-assisting flow path 51 as viewed from above is smoothly connected to the end of the swirl chamber 53, which is a roughly cylindrical space, on the radial inside of the shower device, through the small hole 52.

[0068] Moreover, refer to Figures 9 to 12 A water jet hole 55 (water mist nozzle M) is provided at the lower side of each swirl chamber 53 through the flat-top conical chamber 54. Thus, the water jet hole 55 (water mist nozzle M) is connected to the left and right sides of one flow-assisting channel 51 to form a pair of water mist nozzles M.

[0069] In addition, refer to Figures 9 to 12 The upper side of the swirl chamber 53 is divided by the water mist flow path forming member 56, while the flow-assisting flow path 51, the small hole 52, the swirl chamber 53, the flat-headed conical chamber 54 and the water discharge hole 55 (water mist nozzle M) are divided by the main member 47. The water mist flow path forming member 56 is made of soft resin, and its large-diameter bulging portion 56a is pressed into the corresponding fitting hole 47a of the main member 47, thereby forming the swirl chamber 53 watertightly.

[0070] Through the above structure, the hot water or cold water flowing from the guide flow path into the flow-aiding flow path 51 reaches the vortex chamber 53 through the small hole 52 after flowing through the flow-aiding flow path 51, and flows toward the water discharge hole 55 while swirling inside the vortex chamber 53 and the flat-headed conical chamber 54, and is discharged from the water discharge hole 55 (water mist nozzle M) in the form of mist.

[0071] An example of specific dimensions is that the width of the small hole 52 (the width observed from the extension direction of the flow-aiding flow path 51) is 1.1m, the height of the small hole 52 is 1.2m, the diameter of the vortex chamber 53 is 3.3mm, the height of the vortex chamber 53 is 1.5mm, the height of the flat-headed conical chamber 54 is 1.5mm, the height (length) of the water spouting hole 55 is 0.5mm, and the diameter of the water spouting hole 55 is 1.05mm.

[0072] The layout (position, shape, size, etc.) of the guide flow path is configured so that hot water or cold water can be evenly (symmetrically) supplied to a pair of water discharge holes 55 (water mist nozzles M) through the flow-assisting flow path 51 (see Fig.13 ). Specifically, the guide flow path of the present embodiment is arranged so as to be located between a pair of water ejection holes 55 (water mist nozzles M) when viewed from above.

[0073] In this embodiment, a water mist flow path forming member 56 (see FIG. 1 ) having an arc shape when viewed from above is arranged for one group (six) of water spouting holes 55 (water mist nozzles M) consisting of three pairs of water spouting holes 55 (water mist nozzles M). Figure 4 ). In addition, as a whole, three water mist flow path forming members 56 (see FIG. 5 ) are arranged in a circular arc shape when viewed from above with respect to the three groups of water jet holes 55 (water mist nozzles M). Figure 4 ).

[0074] With the above layout, the radial length occupied by the second water jetting flow path (water mist flow path) of this embodiment is very compact (specifically, Figure 8 The inner diameter of the pear-skin-shaped area is φ52 mm, and the outer diameter is φ58 mm). As a result, the design freedom of the first water jetting flow path (rectifying flow path) and the third water jetting flow path (fluid element nozzle flow path) is improved (especially, as mentioned above, the nozzles C and R can be dispersed in a relatively large area).

[0075] Fig.14 It is an L18 orthogonal table showing the relationship between the size example of the second water jetting flow path (water mist flow path) and the flow rate, particle size and flow velocity of the water mist jetting. Fig.14 As shown, when the height of the flat-headed cone portion is smaller than the height of the small hole (No. 1 to No. 4, No. 6 to No. 9, No. 11 to No. 18), a relatively high water mist discharge flow rate can be achieved.

[0076] In more detail, from Fig.14 From the data shown, it is possible to understand the tendency that "by shortening the truncated cone portion, the particle diameter can be reduced and the flow velocity can be lowered without reducing the flow rate."

[0077] And, in Fig.14The symbols "A", "B", and "C" in each item are typical numerical examples that can be selected by a person skilled in the art. In addition, the relationship between the numerical values ​​is "A" < "B" < "C".

[0078] Particle size and flow rate determination method Fig.15 Schematic diagram of a device for measuring particle size (average particle size) and flow rate (average flow rate). Fig.15 As shown, the shower device 1 is fixed in a manner that the water discharge surface is along the vertical plane, and water is discharged from the water mist nozzle M at a water supply pressure of 0.1MPa. At the same time, a high-speed camera is used to shoot hot water droplets passing through a point 350mm away from the water mist nozzle M in the horizontal direction. Image analysis is performed on multiple continuous captured images, thereby measuring the average flow rate and average particle size of the hot water droplets. The average particle size is Dv50 (cumulative 50% particle size) in the volume average diameter. The measurement results based on this measurement method are Fig.14 The values ​​shown in the table.

[0079] Determination method of sebum removal rate Fig.16 Schematic diagram showing the method of measuring sebum removal rate. 5 μL of simulated skin was applied on the wrist of the test subject, and the shower device 1 was fixed at a height of the water mist nozzle M at a point 350 mm above the simulated skin so that the water discharge surface was along the horizontal plane, and water was discharged for 15 seconds at a water supply (hot water supply) pressure of 0.1 MPa and a hot water supply temperature of 42°C, and the removal rate of the simulated skin was measured.

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

[0081] Evaluation of "skin feel": Spray feeling Furthermore, through follow-up tests on 15 subjects, the "skin feel" was not good for the nozzle structures No. 3, No. 4, No. 8, No. 9, and No. 13. According to these nozzle structures, it is believed that the spray feeling was not sufficient and the "skin feel" was not good because the average particle size of the ejected water droplets was greater than 460μm.

[0082] Evaluation of "skin feel": irritation Furthermore, a follow-up test on 15 subjects showed that the irritation was stronger in the nozzle structures No. 4, No. 7 and No. 17. According to these nozzle structures, the average flow velocity of the ejected water droplets was greater than 4.2 m / s, so the irritation to the skin was too strong.

[0083] Evaluation of temperature drop Fig.17 Schematic diagram of a device for evaluating the temperature drop after water discharge. Fig.17 As shown, a thermopile is set at the temperature measuring part, and the shower device 1 is fixed at a height of 350 mm above the thermopile with the water discharge surface along the horizontal plane at the water mist nozzle M. The room temperature is set to 25°C, and water is discharged at a water supply (hot water supply) pressure of 0.2 MPa and a water discharge temperature of 40°C (the hot water temperature measured in the water mist nozzle M), and the temperature of the thermopile (temperature measuring part) is measured.

[0084] exist Fig.14 In all the 18 types of nozzle structures shown, the temperature measurement values ​​were all above 34° C. As a comparative example, a nozzle structure in which the width of the small hole 52 was 0.6 m, the height of the small hole 52 was 1.0 m, the diameter of the vortex chamber 53 was 4.0 mm, the height of the vortex chamber 53 was 1.0 mm, the height of the flat-headed conical chamber 54 was 3.8 mm, the height (length) of the water spouting hole 55 was 0.9 mm, and the diameter of the water spouting hole 55 was 1.4 mm was evaluated, and the temperature measurement value was lower than 34° C.

[0085] Moreover, through follow-up experiments on 15 subjects, Fig.14 It was confirmed that the "temperature drop level" was appropriate for all the 18 types of nozzle structures shown. On the other hand, it was confirmed that the "temperature drop level" was too large for the nozzle structure of the comparative example.

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

[0087] Features of the switching operation in this embodiment As described above, in the present embodiment, by a single press operation of the push button 11 (an example of a switching operation unit), the disk member 10 rotates 30 degrees, thereby enabling the first water jetting mode (performing rectification water jetting), the second water jetting mode (performing mist water jetting) and the third water jetting mode (performing fluid element water jetting) to be switched in this order.

[0088] That is, when switching from the first jetting mode to the second jetting mode, the mode does not go through the third jetting mode.

[0089] Such a feature can also be realized by other types of switching operation parts. For example, by rotating a part of the secondary side flow path member 4 with the lever operation part, even in the form of switching between the first water jetting mode, the second water jetting mode and the third water jetting mode, when switching from the first water jetting mode to the second water jetting mode, the third water jetting mode will not be passed through. Alternatively, even in the form of providing start buttons corresponding to the first water jetting mode, the second water jetting mode and the third water jetting mode, respectively, it can be configured so that the start button corresponding to the third water jetting mode cannot be operated during the implementation of the first water jetting mode (or the operation is invalidated).

[0090] Features of the water impingement range in this embodiment Fig.18 This is a schematic diagram showing the relative positional relationship between the opening P for jetting water in a straight (continuous) manner and the mist nozzle M for jetting water in a mist manner in the present embodiment. Fig.18 (a) is a schematic diagram viewed from the side. Fig.18 (b) is a schematic diagram viewed from above.

[0091] like Fig.18 As shown, in the present embodiment, predetermined second water jetting areas MF (areas illustrated in the figure in a pear skin pattern) through which mist-like water jetting from two water mist nozzles M located at approximately opposite positions passes overlap with a predetermined first water jetting area PF (areas illustrated in the figure in a cross-section line) through which rectified water jetting from the opening P passes.

[0092] In addition, the region of each second jetting region MF that overlaps the first jetting region PF starts (is generated) at a position that is 3 cm away from the opening P of the first jetting flow channel.

[0093] Moreover, as from Fig.18 As the above description has made clear, in the present embodiment, each predetermined second water jetting area MF (the area illustrated in the pear skin pattern) through which the mist-like water jetting from all 18 water mist nozzles M passes, overlaps with the predetermined first water jetting area PF (the area illustrated in the cross-section line) through which the rectified water jetting from the opening P passes.

[0094] Furthermore, each second jetting region MF may have a so-called hollow cone shape or a perfect cone shape.

[0095] Summary of effective nozzle structures (effects) according to Fig.14The nozzle structures No. 2 to No. 14, No. 16 and No. 17 of the 18 types of nozzle structures shown can achieve a sebum removal rate of 80% because the average flow rate of the ejected water droplets (the ejected water droplets with an average particle size of 800 μm or less) at a point 350 mm away from the water mist nozzle is 2 m / s or more. In other words, more effective cleaning power can be provided.

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

[0097] In addition, about Fig.14 For all 18 types of nozzle structures shown, since the average particle size of the water droplets at a point 350 mm away from the water mist nozzle is above 330 μm, the "level of temperature drop" is appropriate (for example, when switching from other water spraying modes to water mist spraying mode, there is no need to increase the temperature setting).

[0098] In addition, the shower device 1 of the present embodiment has 9 pairs (an example of at least 1 pair) of water mist nozzles M (water spouting holes 55) on the water spouting surface side, and is provided with: a guide flow path (a gap between the water mist flow path forming member 56 and the main member 47) for guiding the hot water or cold water supplied from the water supply members 2 and 3 to the water spouting surface side; and a flow-assisting flow path 51 that is connected to the guide flow path and extends in a direction orthogonal to the water spouting direction of the water mist nozzle M (an example of a direction that intersects). The substantially cylindrical space is the vortex chamber 53 at one end side, which is connected to one end side of the flow-aiding flow path 51 through a small hole 52 at one end side; the water ejection hole 55 at one end side is connected to the vortex chamber 53 at one end side to constitute one side of each pair of water mist nozzles M; the substantially cylindrical space is the vortex chamber 53 at the other end side, which is connected to the other end side of the flow-aiding flow path 51 through a small hole 52 at the other end side; and the water ejection hole 55 at the other end side is connected to the vortex chamber 53 at the other end side to constitute the other side of each pair of water mist nozzles M.

[0099] That is, in the shower device 1 of this embodiment, a single flow-assisting passage 51 is used for the mist water jetting from the two (a pair) water jetting holes 55 at one end and the other end. Therefore, the space utilization efficiency is high. Therefore, a larger number of water mist nozzles M (water jetting holes 55) can be arranged at a higher density on the water jetting surface side.

[0100] In addition, according to the shower device 1 of this embodiment, at least a portion of the guide flow path is divided by the water mist flow path forming member 56 (an example of a water mist flow path forming upper member), and at least a portion of each of the flow-assisting flow path 51 and the pair of swirl chambers 53 (an example of a one-end swirl chamber and an example of a second-end swirl chamber) is divided by the main member 47 (an example of a water mist flow path forming lower member). Thus, compared with the case where all of these components 56, 51, 53 are formed by one member, the difficulty of design and manufacturing can be significantly reduced, thereby increasing the degree of freedom of design and manufacturing, especially when a large number of water mist nozzles M (water discharge holes 55) are mounted.

[0101] In addition, according to the shower device 1 of the present embodiment, the water mist flow path forming member 56 (an example of the water mist flow path forming upper member) further divides the upper side of a pair of swirl chambers 53 (an example of a swirl chamber on one end side and a swirl chamber on the other end side), and the main member 47 (an example of the water mist flow path forming lower member) divides the lower side of a pair of swirl chambers 53 (an example of a swirl chamber on one end side and a swirl chamber on the other end side) and a pair of water spouting holes 55 (an example of a water spouting hole on one end side and a water spouting hole on the other end side). As a result, the dimensional accuracy related to the water spouting holes 55 corresponding to the lower side of each swirl chamber 53 depends only on the manufacturing accuracy of the water mist flow path forming member 56, and is not affected by the assembly of the water mist flow path forming member 56 and the main member 47. As a result, the desired (according to the design content) water mist spouting can be provided with higher accuracy.

[0102] Furthermore, according to the shower device 1 of the present embodiment, the main component 47 (an example of a lower member forming a water mist flow path) divides the truncated cone portion 54 (the truncated cone portion at one end and the truncated cone portion at the other end) between the lower side of each swirl chamber 53 (the swirl chamber at one end and the swirl chamber at the other end) and each water spouting hole 55 (the water spouting hole at one end and the water spouting hole at the other end). Moreover, even the dimensional accuracy related to each truncated cone portion 54 depends only on the manufacturing accuracy of the main component 47 and is not affected by the assembly of the water mist flow path forming member 56 and the main component 47. Thus, the desired (designed) water mist spouting can be provided with higher accuracy.

[0103] In addition, according to the shower device 1 of this embodiment, the large diameter bulge 56a of the water mist flow path forming member 56 is pressed into the fitting hole 47a of the corresponding main component 47 (that is, the water mist flow path forming member 56 is assembled by fitting with the main component 47), so it is relatively easy to form the swirl chamber 53 in a watertight manner.

[0104] In addition, according to the shower device 1 of this embodiment, 9 pairs (an example of at least 1 pair) of water mist nozzles M (water spouting holes 55) are dispersedly arranged in the circumferential direction of the same circle, and the flow-assisting flow path 51 is a linear flow path slightly inclined relative to the tangential direction of the circumferential direction. Therefore, since a plurality of (all) flow-assisting flow paths 51 can be arranged roughly along the circumferential direction, the occupied length in the radial direction can be accommodated very compactly. Therefore, a larger number of water mist nozzles M (water spouting holes 55) can be arranged at a higher density.

[0105] Furthermore, according to the shower device 1 of this embodiment, regarding the flow-assisting flow path 51, when viewed from above, the pair of swirl chambers 53 (the swirl chamber on one end and the swirl chamber on the other end) are arranged in a 180° rotationally symmetrical relationship. Thus, it is possible to facilitate the design of evenly (symmetrically) supplying hot water or cold water to the pair of water mist nozzles M (water discharge holes 55) through the flow-assisting flow path 51.

[0106] Furthermore, the present invention includes the following features (inventions). Feature 1 A shower device has a plurality of water mist nozzles on the water spouting surface side, characterized in that: When water is ejected from the water mist nozzle at a water supply pressure of 0.1 MPa, an average flow velocity of ejected water droplets is 2 m / s or more at a point 350 mm away from the water mist nozzle. Feature 2 The shower device according to feature 1 is characterized in that: When water is ejected from the water mist nozzle at a water supply pressure of 0.1 MPa, the average particle size of ejected water droplets is 460 μm or less at a point 350 mm away from the water mist nozzle. The average flow velocity is below 4.2 m / s. Feature 3 The shower device according to feature 1 or 2 is characterized in that the average particle size is 330 μm or more. Feature 4 The shower device according to any one of features 1 to 3, wherein: The plurality of water mist nozzles include at least one pair of water mist nozzles, The shower device includes: a guide flow path for guiding the hot water or cold water supplied from the water supply member to the water discharge surface side; a flow-assisting flow path, which is connected to the guide flow path and extends in a direction intersecting with a water spouting direction of the at least one pair of water mist nozzles; A substantially cylindrical space, namely a swirl chamber at one end, is connected to one end of the flow-assisting channel through a small hole at one end; One end side water spouting hole communicates with the one end side swirl chamber to constitute one side of each pair of water mist nozzles; The substantially cylindrical space, i.e., the other end side swirl chamber, is connected to the other end side of the flow-assisting flow path through the other end side small hole; The other end side water discharge hole is communicated with the other end side swirl chamber to constitute the other side of each pair of water mist nozzles. Feature 5 The shower device according to feature 4 is characterized in that: At least a portion of the guide flow path is divided by an upper member forming a water mist flow path. At least a portion of each of the flow assisting flow path, the one end side swirl chamber, and the other end side swirl chamber is partitioned by a water mist flow path forming lower member. Feature 6 The shower device according to feature 5 is characterized in that: The water mist flow path forming upper member further divides the upper side of the one end side swirl chamber and the upper side of the other end side swirl chamber. The water mist flow path forming lower member partitions the lower side of the one end side swirl chamber, the one end side water ejection hole, the lower side of the other end side swirl chamber, and the other end side water ejection hole. Feature 7 The shower device described in feature 6 is characterized in that the water mist flow path forms a lower component that divides a flat-top cone portion on one end side between the lower side of the swirl chamber on the one end side and the water ejection hole on the one end side, and divides a flat-top cone portion on the other end side between the lower side of the swirl chamber on the other end side and the water ejection hole on the other end side. Feature 8 The shower device according to feature 7 is characterized in that: The one end side truncated cone portion and the other end side truncated cone portion have the same height. The one end side small hole and the other end side small hole have the same height as each other and are greater than heights of the one end side truncated circular cone portion and the other end side truncated circular cone portion. Feature 9 The shower device according to any one of features 4 to 8 is characterized in that the flow-assisting flow path extends in a direction substantially perpendicular to a water spouting direction of the mist nozzle. Feature 10 The shower device according to feature 9 is characterized in that: The at least one pair of water mist nozzles includes a plurality of pairs of water mist nozzles dispersedly arranged in the circumferential direction of substantially the same circle, The flow-assisting flow path is a linear flow path slightly inclined with respect to a tangential direction of the circumferential direction. Feature 11 The shower device according to any one of features 4 to 10 is characterized in that, regarding the flow-assisting flow path, the one-end-side swirl chamber and the other-end-side swirl chamber are arranged in a 180° rotationally symmetrical relationship when viewed from above.

Claims

1. A shower device having a plurality of water mist nozzles on the water spouting surface side, characterized in that: When water is ejected from the water mist nozzle at a water supply pressure of 0.1 MPa, an average flow velocity of ejected water droplets is 2 m / s or more at a point 350 mm away from the water mist nozzle.

2. The shower device according to claim 1, characterized in that: When water is ejected from the water mist nozzle at a water supply pressure of 0.1 MPa, the average particle size of ejected water droplets is 460 μm or less at a point 350 mm away from the water mist nozzle. The average flow velocity is below 4.2 m / s.

3. The shower device according to claim 2, characterized in that: The average particle size is 330 μm or more.

4. The shower device according to any one of claims 1 to 3, characterized in that: The plurality of water mist nozzles include at least one pair of water mist nozzles, The shower device includes: a guide flow path for guiding the hot water or cold water supplied from the water supply member to the water discharge surface side; a flow-assisting flow path, which is connected to the guide flow path and extends in a direction intersecting with a water spouting direction of the at least one pair of water mist nozzles; A substantially cylindrical space, namely a swirl chamber at one end, is connected to one end of the flow-assisting channel through a small hole at one end; One end side water spouting hole communicates with the one end side swirl chamber to constitute one side of each pair of water mist nozzles; The substantially cylindrical space, i.e., the other end side swirl chamber, is connected to the other end side of the flow-assisting flow path through the other end side small hole; The other end side water discharge hole is communicated with the other end side swirl chamber to constitute the other side of each pair of water mist nozzles.

5. The shower device according to claim 4, characterized in that: At least a portion of the guide flow path is divided by an upper member forming a water mist flow path. At least a portion of each of the flow assisting flow path, the one end side swirl chamber, and the other end side swirl chamber is partitioned by a water mist flow path forming lower member.

6. The shower device according to claim 5, characterized in that: The water mist flow path forming upper member further divides the upper side of the one end side swirl chamber and the upper side of the other end side swirl chamber. The water mist flow path forming lower member partitions the lower side of the one end side swirl chamber, the one end side water ejection hole, the lower side of the other end side swirl chamber, and the other end side water ejection hole.

7. The shower device according to claim 6, characterized in that: The water mist flow path forming lower member defines a first end side truncated cone portion between the lower side of the first end side swirl chamber and the first end side water ejection hole, and defines a second end side truncated cone portion between the lower side of the second end side swirl chamber and the second end side water ejection hole.

8. The shower device according to claim 7, characterized in that: The one end side truncated cone portion and the other end side truncated cone portion have the same height. The one end side small hole and the other end side small hole have the same height as each other and are greater than heights of the one end side truncated circular cone portion and the other end side truncated circular cone portion.

9. The shower device according to claim 8, characterized in that: The flow-assisting flow path extends in a direction substantially perpendicular to a water spouting direction of the water mist nozzle.

10. The shower device according to claim 9, characterized in that: The at least one pair of water mist nozzles includes a plurality of pairs of water mist nozzles dispersedly arranged in the circumferential direction of substantially the same circle, The flow-assisting flow path is a linear flow path slightly inclined with respect to a tangential direction of the circumferential direction.

11. The shower device according to claim 10, characterized in that: Regarding the flow-assisting flow channel, the one-end-side swirl chamber and the other-end-side swirl chamber are arranged in a 180° rotationally symmetrical relationship when viewed from above.

Images