WO2014057660A1

WO2014057660A1 - Shower head

Info

Publication number: WO2014057660A1
Application number: PCT/JP2013/006001
Authority: WO
Inventors: 前田　康成; 伊藤　良泰; 尚紀柴田; 朋弘穐田
Original assignee: パナソニック株式会社
Priority date: 2012-10-11
Filing date: 2013-10-08
Publication date: 2014-04-17
Also published as: EP2907431B1; EP2907431A4; CN104703520B; CN104703520A; EP2907431A1

Abstract

A shower head comprises: a head body in which an introduction flow passage is formed and which is provided with a gas-liquid mixing section for sucking gas and mixing the gas as gas bubbles into hot water; a water spray plate which has a flat plate-like portion, has water spray holes formed therein so as to penetrate through the flat plate-like portion in the plate thickness direction, and is mounted to the head body at a position on the outside of the outlet of the introduction flow passage; and a discharge flow passage which is formed between the head body and the water spray plate and which is disposed parallel to the water spray plate. The introduction flow passage has an expanding flow passage section on the outlet side, and the cross-sectional area of the expanding flow passage section gradually increases toward the outlet. The discharge flow passage is disposed so as to be substantially perpendicular to the portion of the introduction flow passage which is located on the outlet side. The inlet of the discharge flow passage has a cross-sectional area which causes the volume of hot water which flows into the discharge flow passage per unit time is less than or equal to the volume of hot water which passes through per unit time the portion of the introduction flow passage which does not include the expanding flow passage section.

Description

shower head

The present invention relates to a shower head for discharging hot water mixed with fine bubbles from watering holes.

Fine bubbles with a diameter of 50 μm or less mixed in hot water have a large specific surface area, and thus, for example, a large amount of dirt such as human sebum can be adsorbed and removed. Since the specific surface area of the fine bubbles decreases as the diameter thereof decreases, in order to improve the cleaning function as described above, it is desirable to reduce the diameter of the fine bubbles as much as possible.

The following Patent Document 1 describes a liquid ejection device capable of generating fine bubbles efficiently and with high density. This liquid discharge apparatus can be applied to a shower head.

In the liquid ejection device described in Patent Document 1, a liquid flow path such as hot water is provided with a liquid introduction path, a liquid flow rotator circuit connected to the upstream side of the liquid introduction path, and an upstream side of the liquid flow circulation circuit. It is formed from a contracted channel connected to the side and an expanded channel connected to the upstream side of the contracted channel. The liquid flow swirl circuit is one in which liquid swirl vanes are arranged, and the diameter of the contracted flow path is made smaller than the diameter of the liquid flow swirl circuit. Moreover, the diameter of the expanded flow path is made larger than the diameter of the contracted flow path. This expanded flow path communicates with the liquid discharge port.

In addition, the liquid discharge device described in Patent Document 1 includes an air flow introduction path for a gas such as air, and the air flow introduction path communicates with the outside of the liquid discharge apparatus and is in a liquid flow turning circuit or a contracted flow path. It opens at the downstream side. Moreover, in the liquid discharge apparatus described in Patent Document 1, a tapered liquid flow scattering surface that faces the expanded flow path and faces the opening range of the contracted flow path is provided.

In such a liquid discharge apparatus, a swirl flow is generated in the liquid introduced through the liquid introduction path by the liquid swirl vane in the liquid flow circuit, and a gas such as air swirls through the air flow introduction path due to the decompression action generated at this time. The gas-liquid mixed fluid is generated by mixing in the flow. When the generated gas-liquid mixed fluid passes through the contracted flow path, the flow velocity and the swirl frequency increase, and fine bubbles are gradually generated in the gas-liquid mixed fluid by the shearing force. Thereafter, vortex breakdown occurs due to the dispersion of the swirling flow due to centrifugal force in the expanded flow path, the bubbles contained in the gas-liquid mixed fluid are refined, and many fine bubbles are generated. Further, a part of the gas-liquid mixed fluid collides with the liquid flow scattering surface, the vortex flow is completely destroyed, and fine bubbles are generated. The liquid containing many fine bubbles thus generated is discharged to the outside through the liquid discharge port.

JP 2009-178661 A

It is described in Patent Document 1 that the liquid discharge device as described above can reduce the cost of parts and improve the assemblability, and can suppress an increase in manufacturing cost. However, the liquid ejection device described in Patent Document 1 cannot be denied that the configuration for generating fine bubbles is somewhat complicated. For example, it is pointed out that a liquid flow circuit is required, and the liquid flow circuit must be provided with a liquid swirl blade for the formation of a swirl flow. It is also pointed out that a liquid scattering surface must be provided. In order to realize a versatile shower head, simplification of the configuration is definitely desired.

The present invention has been made in view of the circumstances as described above, and provides a shower head capable of suppressing the coalescence of bubbles and promoting the generation of fine bubbles while simplifying the configuration. Is an issue.

In order to solve the above problems, the shower head of the present invention has a hot water introduction flow path formed therein, and sucks gas by decompression when hot water is introduced upstream of the introduction flow path. A head body provided with a gas-liquid mixing part to be mixed into the hot water as bubbles and a flat part, and a plurality of sprinkling holes are formed through the flat part in the plate thickness direction. A water spray plate disposed on the outside of the outlet and attached to the head main body, and a hot water discharge flow channel formed between the head main body and the water spray plate and disposed in parallel to the water spray plate and communicating with the introduction flow channel. Provided, the introduction flow path has a flow path enlargement portion whose cross-sectional area gradually expands toward the exit on the outlet side, and the discharge flow path is substantially orthogonal to the outlet side portion of the introduction flow path. The inlet of the discharge channel is arranged at the discharge channel per unit time Hot water volume flows into, and characterized by having a cross sectional area equal to or less than hot water volume passing per unit time in the portion excluding the enlarged flow path portion of the introduction channel.

In this shower head, in the flow path enlarged portion of the introduction flow path, each cross section in the length direction preferably has a cross-sectional area in which the volume of hot water passing per unit time is equal for each cross section. .

Further, in the shower head, it is preferable that the watering holes formed in the watering plate have a pressurizing part on the inlet side and a pressure reducing part on the outlet side.

Further, in the shower head, it is preferable that a plurality of ribs are provided in the discharge passage along the flow direction of the hot water in the discharge passage, and the discharge passage is partitioned by the ribs.

Moreover, in the shower head, it is preferable that one rib is disposed between two adjacent watering holes.

Further, in the shower head, in the water spray plate, a swirl flow generation flow path for generating a swirl flow in the hot water is provided on the upstream side of the water spray hole, and the swirl flow generation flow path includes both the discharge flow path and the water spray hole. It is preferable that it is arranged so as to communicate with the discharge channel and spread outward from the discharge flow path.

In the shower head, it is preferable that the length of the hot water discharge direction toward the sprinkling hole is shorter than the length of the hot water introduction direction orthogonal to this length in the swirl flow generation flow path.

In the shower head, it is preferable that a fine bubble generating unit is formed by the discharge flow path and the swirl flow generating flow path, and a plurality of the fine bubble generating units are provided side by side in the length direction of the head body.

Further, in the shower head, it is preferable that adjacent swirl flow generating flow paths are communicated with each other by a communicating portion in two adjacent micro-bubble generating units.

According to the shower head of the present invention, the configuration is simplified, and the coalescence of bubbles is suppressed and the generation of fine bubbles is promoted.

FIGS. 1A and 1B are a front view showing a first embodiment of a shower head according to the present invention and a cross-sectional view taken along line AA in FIG. It is a perspective view of the shower head shown in Drawing 1 (a) (b). It is sectional drawing similar to FIG.1 (b) which showed 2nd Embodiment of the shower head of this invention. It is the principal part expanded sectional view which showed 3rd Embodiment of the shower head of this invention. It is sectional drawing which showed 4th Embodiment of the shower head of this invention. It is sectional drawing which showed 5th Embodiment of the shower head of this invention. (A) and (b) are respectively a front view showing a sixth embodiment of the shower head of the present invention and a cross-sectional view taken along line AA of FIG. 1 (a). It is sectional drawing which showed 7th Embodiment of the shower head of this invention. It is sectional drawing of the length direction which showed 8th Embodiment of the shower head of this invention. (A) and (b) are the perspective views of the front side of the shower head shown in FIG. 9, and the principal part perspective view of a back side, respectively. It is the perspective view which showed the watering board in the shower head shown in FIG. 9 from the back surface side. (A) and (b) are the back views of the watering board shown in FIG. 11, respectively, and the principal part sectional drawing of the width direction of the shower head shown in FIG. (A), (b), and (c) are perspective views showing a main part of a shower head according to a ninth embodiment of the present invention, a cross-sectional view taken along line AA in FIG. 13 (a), and B in FIG. 13 (a), respectively. -B is a cross-sectional view.

FIGS. 1A and 1B are a front view showing a first embodiment of a shower head according to the present invention and a cross-sectional view taken along line AA in FIG. FIG. 2 is a perspective view of the shower head shown in FIGS.

The shower head 1 includes a head main body 2, a water spray plate 3, and a hot water discharge channel 4.

In the head main body 2, a hot water introduction flow path 30 is formed inside, and a gas / liquid is sucked into the hot water in the upstream side of the introduction flow path 30 by sucking gas by decompression when hot water is introduced. A mixing unit 11 is provided.

The water spray plate 3 has a flat portion. In the flat plate-like portion, a plurality of water spray holes 31 are formed penetrating in the plate thickness direction. Such a water spray plate 3 is disposed outside the outlet 28 of the introduction flow path 30 and attached to the head body 2.

The discharge flow path 4 is formed between the head body 2 and the water spray plate 3, is disposed in parallel to the water spray plate 3, and communicates with the introduction flow path 30.

And in the showerhead 1, the introduction flow path 30 has the flow-path expansion part 29 in which a cross-sectional area expands gradually toward the exit 28 in the exit 28 side. Further, the discharge flow path 4 may be disposed substantially orthogonal to the portion of the introduction flow path 30 on the outlet 28 side. The inlet 35 of the discharge flow path 4 is such that the volume of hot water flowing into the discharge flow path 4 per unit time passes through per unit time in the portion of the introduction flow path 30 excluding the flow path expanding portion 29. It has the following cross-sectional area.

Specifically, in the shower head 1, the head main body 2 includes a base portion 5 and a superposition portion 6 that are both disk-shaped. The base portion 5 is a member having a slight thickness, and a first introduction flow path 7 having a circular cross section is formed therein, which introduces hot water and sends it to the polymerization portion 6. The first introduction flow path 7 has an inlet 8 at the side end of the base 5 and an outlet 9 at the center, and is bent substantially in an L shape. That is, the first introduction flow path 7 extends straight from the inlet 8 toward the central axis of the base 5, bends in a substantially L shape near the central axis, and has a bent portion 10. In the base portion 5, a gas-liquid mixing portion 11 is provided near the inlet 8 of the first introduction flow path 7.

In the gas-liquid mixing part 11, a second introduction flow path 12 having a circular cross section for introducing hot water and sending it to the inlet 8 of the base part 5 is formed therein. The second introduction flow path 12 has a pressurization part 14 whose inner diameter is rapidly reduced in the length direction of the second introduction flow path 12 on the inlet 13 side, and communicates with the pressurization part 14 on the outlet 15 side. The pressure reducing portion 16 has an inner diameter that gradually increases toward the outlet 15. Further, in the second introduction channel 12, the outlet 15 coincides with the inlet 8 of the first introduction channel 7 formed inside the base 5, and the second introduction channel 12 communicates with the first introduction channel 7. is doing.

Further, the gas-liquid mixing unit 11 has an air passage 17 for a gas such as air, oxygen, carbon dioxide, ozone, etc. in the vicinity of the connecting portion between the pressurization unit 14 and the decompression unit 16 in the second introduction flow channel 12. A gas introduction pipe 18 having a circular cross section is connected orthogonally to the gas-liquid mixing unit 11. The gas introduction pipe 18 extends outward of the gas-liquid mixing unit 11, has an inlet 19 at the tip thereof, and has an outlet 20 at a portion arranged closest to the gas-liquid mixing unit 11. Further, in the gas-liquid mixing unit 11, a communication path 21 having a circular cross section is formed inside between the second introduction flow path 12 and the outlet 20 of the gas introduction pipe 18. The air passage 17 of the gas introduction pipe 18 communicates with the second introduction passage 12 via the communication passage 21.

In such a gas-liquid mixing part 11, the end part on the outlet 15 side of the second introduction flow path 12 is fitted and fixed to the concave part 22 formed on the side end part of the base part 5, and the outer side of the base part 5 is fixed. Protruding. In the concave portion 22, an O-ring 23 is interposed between the base portion 5 and the gas-liquid mixing portion 11, and water tightness between the base portion 5 and the gas-liquid mixing portion 11 is ensured. The arrangement position of the gas-liquid mixing part 11 is not limited to the upstream side of the first introduction flow path 7 of the base part 5, and is on the way from the inlet 8 to the bent part 10 of the first introduction flow path 7. It is also possible.

In the base 5, a plurality of fixing holes 24 are formed in the outer peripheral portion thereof so as to penetrate in the thickness direction of the base 5. The fixing holes 24 are used for coupling the water spray plate 3 and the base portion 5, and are arranged on the outer peripheral portion of the base portion 5 at a predetermined interval.

The overlapping portion 6 is a disk-shaped member that is slightly smaller in size than the base portion 5 and has a certain thickness. In the superposition | polymerization part 6, the 3rd introduction flow path 25 with a circular cross section which introduce | transduces and sends out hot water in the inside is formed. The third introduction channel 25 is located on the central axis of the overlapping portion 6 and penetrates the overlapping portion 6 in the front and back direction. The superposition part 6 superposes the base 5 with the inlet 26 of the third introduction flow path 2 aligned with the outlet 9 of the first introduction flow path 7 of the base 5, and forms the head body 2 with the base 5. In the part where the polymerization part 6 and the base part 5 are superposed, an O-ring 27 is interposed in the part where the outlet 9 of the first introduction flow path 7 and the inlet 26 of the third introduction flow path 25 are close to each other. Watertightness between the parts 6 is ensured.

The third introduction flow path 25 formed in the polymerization section 6 has a flow path expansion section 29 on the outlet 28 side where the inner diameter gradually increases toward the outlet 28 and the cross-sectional area gradually increases. In the flow path enlargement part 29, it curves so that an inner surface may spread outside as it goes to the exit 28. FIG.

In the head body 2, a hot water introduction flow path 30 is formed by the first introduction flow path 7, the second introduction flow path 12, and the third introduction flow path 25. Hot water introduced into the introduction flow path 30 and flowing out from the introduction flow path 30 is discharged from a water spray hole 31 formed in the water spray plate 3.

In the water spray plate 3, a plurality of water spray holes 31 are formed between the central portion and the outer peripheral portion. The portion of the water spray plate 3 where at least the water spray holes 31 are formed has a thin and flat disk shape, and the water spray holes 31 penetrate the disk-shaped portion in the thickness direction. . Moreover, the water sprinkling hole 31 forms the basic pattern of arrangement | sequence by three adjacent, and in this basic pattern, the three water sprinkling holes 31 are arrange | positioned away from the center side toward the outer peripheral side at fixed intervals. This basic pattern is repeatedly arranged along the outer periphery of the water spray plate 3, and the arrangement form of the water spray holes 31 in the water spray plate 3 is substantially spiral.

Further, in the water spray plate 3, a thick cylindrical body 32 is protruded from the outer periphery thereof. The trunk | drum 32 is arrange | positioned from the outer side of the water spray hole 31 arrange | positioned closest to the outer periphery in the water spray plate 3 to the outer peripheral end of the water spray plate 3. The inner diameter of the body portion 32 substantially matches the outer diameter of the overlapping portion 6 of the head body 2. Further, in the body portion 32, a plurality of attachment holes 33 are formed so as to penetrate in the length direction of the body portion 32 and in the thickness direction of the water spray plate 3. The attachment hole 33 is for attaching the water spray plate 3 to the base 5 of the head body 2. The sprinkling plate 3 is formed by aligning the mounting hole 33 with the fixing hole 24 formed in the base 5 and superposing the watering plate 3 on the base 5 and screwing a fastener such as a screw from the mounting hole 33 toward the fixing hole 24. Is combined with the base 5 and the shower head 1 is assembled. In the shower head 1, the water spray plate 3 is disposed at the outlet of the introduction flow path 30 formed in the head body 2, that is, outside the outlet 28 of the third introduction flow path 25 formed in the overlapping portion 6.

For example, when the sprinkling plate 3 and the base portion 5 are joined, the superposition portion 6 is superposed on the inner side of the barrel portion 32 of the sprinkling plate 3 by, for example, fitting the sprinkling plate 3 and the base portion. This can be realized simultaneously with the combination of five. Of course, the superposition | polymerization part 6 can superpose | polymerize on the base 5 prior to attachment of the watering board 3, and can also be fixed using a fastener. An O-ring 34 is interposed between the trunk portion 32 and the overlapping portion 6 to ensure water tightness between the overlapping portion 6 and the trunk portion 32.

In the shower head 1 assembled in this way, a hot water discharge passage 4 is formed between the head body 2 and the water spray plate 3. Specifically, a narrow gap between the overlapping portion 6 of the head body 2 and the water spray plate 3 serves as the discharge flow path 4. The discharge channel 4 is disposed in parallel to the water spray plate 3 and communicates with the introduction channel 30 of the head body 2. Further, the discharge channel 4 communicates with the water spray holes 31 of the water spray plate 3.

Further, the discharge channel 4 is disposed substantially orthogonally to the outlet side portion of the introduction channel 30, that is, the portion from the bent portion 10 to the outlet 9 of the first introduction channel 7 and the third introduction channel 25. Has been. And in the discharge flow path 4, the inlet 35 which corresponds to the downstream end of the flow-path expansion part 29 which is an exit of the introduction flow path 30 has the cross-sectional area which has the following relationship. That is, the cross-sectional area of the inlet 35 is, for example, a unit in a portion excluding the flow path expanding portion 29 of the introduction flow path 30 where the washer-like volume of the hot water flowing into the discharge flow path 4 per unit time of about 0.1 seconds. It is set to be equal to or less than the volume of the disc-shaped hot water passing per time. The cross-sectional area of the inlet 30 is an area of a cross section perpendicular to the direction of hot water flowing through the introduction flow path 30.

Such a shower head 1 can discharge hot water containing a large number of fine bubbles having a diameter of 50 μm or less from the sprinkling holes 31. The shower head 1 is connected to a water pipe such as a hose through which hot water passes and an inlet 13 of the gas-liquid mixing unit 11. Hot water introduced into the second introduction flow path 12 of the gas-liquid mixing unit 11 through the water pipe is once pressurized when passing through the pressurizing unit 14 and then depressurized when passing through the decompression unit 16. Along with the decompression at this time, a gas such as air, oxygen, carbon dioxide, ozone, etc. is sucked into the air passage 17 of the gas introduction pipe 18 through the inlet 19. The sucked gas is mixed as bubbles in the hot water introduced into the second introduction flow path 12 from the outlet 20 through the communication path 21. As a result, hot and cold water is introduced into the first introduction channel 7 from the outlet 15 of the second introduction channel 12 through the inlet 8 as a gas-liquid mixed fluid.

The hot water introduced into the first introduction flow path 7 changes the direction of flow at the bent portion 10 to a substantially perpendicular direction, flows out from the outlet 9 of the first introduction flow path 7, and passes through the inlet 26 to the third introduction flow path 25. Introduced in. When the hot water introduced into the third introduction flow channel 25 passes through the flow channel expansion portion 29, it flows outward along the inner surface of the flow channel expansion portion 29 and flows from the outlet 28 of the third introduction flow channel 25. It is introduced into the discharge channel 4 through the inlet 35. Since the flow path expanding portion 29 is curved so that the inner surface spreads outward, the occurrence of turbulent flow such as vortex in the hot water flowing out from the outlet 28 is suppressed. Collisions between the bubbles accompanying the generation of turbulent flow are suppressed, and coalescence of the bubbles is suppressed.

In the inlet 35 of the discharge flow path 4, the volume of hot water flowing into the discharge flow path 4 per unit time is equal to or less than the volume of hot water passing per unit time in a portion of the introduction flow path 30 excluding the flow path expansion portion 29. Since it has a cross-sectional area, hot water introduced into the discharge flow path 4 is pressurized. In the discharge flow path 4, since the cross-sectional area of the portion downstream from the inlet 35 is larger than the cross-sectional area of the inlet 35, the pressure is gradually reduced. As a result of this pressurization and depressurization, the bubbles in the hot water are crushed even near the inlet 35, and most of them become fine bubbles. As described above, the hot water containing a large number of fine bubbles is suppressed from generating turbulent flow as described above, and flows almost radially from the inlet 35 toward the outer peripheral portion. Then, hot water containing a large number of fine bubbles is discharged to the outside of the shower head 1 through the water spray holes 31. Since the diameter of the fine bubbles is much smaller than the inner diameter of the water spray hole 31, it can easily pass through the water spray hole 31. Hot water containing many fine bubbles discharged from the shower head 1 has a high cleaning function and the like because the fine bubbles have a large specific surface area.

As described above, the shower head 1 basically includes the head body 2 in which the introduction flow path 30 is formed inside and the gas-liquid mixing unit 11 is provided on the upstream side of the introduction flow path 30, and the plurality of water spray holes 31. And a discharge channel 4 formed between the head main body 2 and the water spray plate 3. Therefore, the shower head 1 has a simplified configuration while promoting the production of hot water containing a large number of fine bubbles. The shower head 1 is considered promising as being versatile.

FIG. 3 is a sectional view similar to FIG. 1B, showing a second embodiment of the shower head of the present invention.

Referring to the shower head 1a, portions common to the shower head 1 shown in FIG. 1B are denoted by the same reference numerals in FIG. 3, and the description thereof is omitted below.

In the shower head 1 a, the flow path enlarged portion 29 a of the introduction flow path 30 is different from the flow path enlarged portion 29 of the shower head 1. That is, in the flow path expanding portion 29a, each cross section in the length direction, that is, a cross section perpendicular to the flowing direction of the hot water has an area in which the volume of hot water passing per unit time is equal for each cross section. . In the shower head 1a having such a flow passage expanding portion 29a, it is possible to suppress a decrease in the flow rate when hot water passes through the flow passage expanding portion 29a, and as a result, the collision between bubbles in the hot water is further suppressed. And the coalescence of bubbles is further suppressed. The expansion of bubbles and the accompanying decrease in the number of bubbles are suppressed.

FIG. 4 is an enlarged cross-sectional view showing a main part of a third embodiment of the shower head according to the present invention.

Referring to the shower head 1b, portions common to the shower head 1 shown in FIG. 1B are denoted by the same reference numerals in FIG. 4, and description thereof is omitted below. In FIG. 4, the periphery of the watering hole 31a formed in the watering board 3 with which the shower head 1b is provided is shown.

In the shower head 1b, the water sprinkling hole 31a has a pressurizing part 37 whose inner diameter abruptly decreases on the inlet 36 side facing the discharge flow path 4 shown in FIG. 1 (b), and hot water is used in the shower head 1b. On the side of the outlet 38 for discharging to the outside, there is a pressure reducing part 39 whose inner diameter gradually increases. The pressurization part 37 and the pressure reduction part 39 are connected in the middle of the length direction of the watering hole 31a, and are mutually connected.

In the shower head 1b including the water spray plate 3 in which such water sprinkling holes 31a are formed, hot water containing a large number of fine bubbles is once pressurized in the pressurizing unit 37 when passing through the water sprinkling holes 31a. The pressure is reduced by the pressure reducing unit 39. Due to such pressure fluctuation, when passing through the sprinkling holes 31a, the fine bubbles contained in the hot water are further crushed and become very small in diameter. The specific surface area of the fine bubbles is further increased, and the function of cleaning hot water containing many fine bubbles discharged from the shower head 1b is improved.

The angle α formed by the inner surfaces facing each other in the decompression unit 39 is preferably in the range of 10 ° to 20 ° from the viewpoint of the pulverization efficiency of fine bubbles, and generally about 15 ° is exemplified.

FIG. 5 is a cross-sectional view showing a fourth embodiment of the shower head of the present invention.

FIG. 5 illustrates the shower head 1c as corresponding to the BB cross section of the shower head 1 shown in FIG. 1 (b). With respect to the shower head 1c, parts common to the shower head 1 shown in FIG. 1B are denoted by the same reference numerals in FIG. 5 and description thereof is omitted below.

In the shower head 1c, along the hot water flow direction in the discharge flow path 4 provided in the same manner as the shower head 1 shown in FIG. 1B, that is, in the direction from the central portion of the water spray plate 3 toward the outer peripheral portion. A plurality of ribs 40 are provided along. The ribs 40 project from the water spray plate 3, extend from the water spray plate 3 in the length direction of the body portion 32, and are arranged radially at regular intervals. When the water spray plate 3 provided with such a plurality of ribs 40 is attached to the head main body 2, the ribs 40 are inserted into the discharge flow paths 4, and the discharge flow paths 4 are partitioned by the ribs 40.

The shower head 1c can easily form a radial flow from the inlet 35 to the outer peripheral portion of the discharge flow path 4 in the hot water introduced into the discharge flow path 4 from the inlet 35. Generation in hot water is suppressed, and generation of turbulent flow is suppressed. For this reason, the coalescence of the bubbles accompanying the collision between the bubbles contained in the hot water and the collision is further suppressed. It is possible to discharge hot water containing a large number of fine bubbles with improved cleaning functions.

The rib 40 is arrange | positioned for every basic pattern in the arrangement | positioning form as mentioned above of the watering hole 31 formed in the watering board 3 in the shower head 1c. However, the arrangement of the ribs 40 is not particularly limited to the arrangement of each basic pattern in the arrangement form of the water spray holes 31.

FIG. 6 is a sectional view showing a fifth embodiment of the shower head of the present invention.

FIG. 6 shows the shower head 1d in the same manner as FIG. With respect to the shower head 1d, portions common to the shower head 1 shown in FIG. 1B are denoted by the same reference numerals in FIG. 6, and description thereof is omitted below.

In the shower head 1 d, the ribs 40 shown in FIG. 5 are arranged one by one between two adjacent watering holes 31. Such an arrangement of the ribs 40 is directed from the inlet 35 of the discharge flow channel 4 toward the outer peripheral portion to the hot water introduced into the discharge flow channel 4 provided in the same manner as the shower head 1 shown in FIG. It becomes easier to form a radial flow. Generation of the circumferential flow of the discharge flow path 4 in the hot water is further suppressed, and generation of turbulence is further suppressed. For this reason, collision of bubbles contained in hot water and coalescence of bubbles accompanying the collision are further suppressed. It is possible to discharge hot water containing a large number of fine bubbles with a further improved cleaning function and the like.

FIGS. 7A and 7B are a front view and a cross-sectional view taken along line AA in FIG. 1A, respectively, showing a sixth embodiment of the shower head of the present invention.

Referring to the shower head 1e, parts common to the shower head 1 shown in FIG. 1B are denoted by the same reference numerals in FIG. 7, and description thereof is omitted below.

In the shower head 1e, a swirl flow generation channel 41 for generating a swirl flow in the hot water flow is provided in the recessed portion on the upstream side of the sprinkling holes 31 formed in the sprinkler plate 3. The swirl flow generating channel 41 is formed as a circular groove in which the water spray plate 3 is cut out in the thickness direction. The swirl flow generation channel 41 has a relationship of l <d, where l is the length of the hot water discharge direction toward the sprinkling hole 31 and d is the length d of the hot water introduction direction orthogonal to the length l. ing. That is, in the swirl flow generation channel 41, the length l in the discharge direction toward the water spray hole 31 is shorter than the length d in the hot water introduction direction orthogonal to the length l. Such a swirl flow generation flow path 41 communicates with both the discharge flow path 4 and the water spray holes 31. Further, the swirl flow generation flow channel 41 is disposed so as to spread outward from the discharge flow channel 4. In the swirl flow generation channel 41, the length 1 in the discharge direction of hot water is between the head body 2 and the water spray plate 3 where the discharge channel 4 is formed, specifically, the overlapping portion 6 of the head body 2. It is longer than the gap between the water spray plate 3.

In addition, in the shower head 1e, the trunk | drum 32 protrudingly provided in the outer peripheral part of the water spray plate 3 is arrange | positioned in the water spray plate 3 from the outer side of the swirl flow generation flow path 41 to the outer peripheral end of the water spray plate 3.

The shower head 1e can also discharge hot water containing a large number of fine bubbles having a diameter of 50 μm or less from the sprinkling holes 31. When the hot water introduced into the swirl flow generation channel 41 is introduced into the swirl flow generation channel 41, it collides with the inner surface of the trunk portion 32, and the flow is bent at a substantially right angle toward the water spray hole 31. For this reason, a swirling flow is temporarily generated in the hot water introduced into the swirling flow generating channel 41. However, this swirl flow is generated due to a difference in fluid action force between the flow of hot water toward the sprinkling hole 31 and the flow of hot water flowing into the swirl flow generation flow channel 41 from the discharge flow channel 4. Collapses soon due to shear force. The hot water may contain some large bubbles having a relatively large diameter, and the large bubbles are generally easily trapped at the center of the swirling flow. However, as the swirling flow collapses, the large bubbles are released from restraint and are crushed by the shearing force, so that they become fine bubbles. The refinement of bubbles contained in the hot water is promoted by the swirling flow generated in the swirling flow generating channel 41 and its collapse, and hot water containing many fine bubbles is generated.

Moreover, the swirl flow generation channel 41 has a relationship of l <d, where l is the length in the discharge direction toward the sprinkling hole 31 and d is the length in the introduction direction orthogonal to the length l. In some cases, the difference between the forces acting on the hot water in the direction of hot water spraying and the direction of hot water introduction increases. Due to this difference in force, the shearing force due to the swirling flow generated in the swirling flow generating channel 41 becomes larger, and the crushing of the bubbles is further promoted and functions effectively for miniaturization. The hot water discharged from the sprinkling holes 31 is of a high quality with a higher density of fine bubbles. Moreover, shortening the length l in the direction of hot water spraying also contributes to the miniaturization of the shower head 1.

FIG. 8 is a cross-sectional view similar to FIG. 7B, showing a seventh embodiment of the shower head of the present invention.

Referring to the shower head 1f, parts common to the shower head 1e shown in FIG. 7B are denoted by the same reference numerals in FIG. 8, and description thereof is omitted below.

In the shower head 1f, the flow path enlarged portion 29a of the introduction flow path 30 is different from the flow path enlarged portion 29 of the shower head 1e shown in FIG. That is, in the flow path expanding portion 29a, each cross section in the length direction, that is, a cross section perpendicular to the flowing direction of the hot water has an area where the volume of hot water passing per unit time is equal for each cross section. Yes. In the shower head 1f having such a flow passage expanding portion 29a, it is possible to suppress a decrease in the flow rate when hot water passes through the flow passage expanding portion 29a, and as a result, the collision of bubbles in the hot water is further suppressed. And the coalescence of bubbles is further suppressed. The expansion of bubbles and the accompanying decrease in the number of bubbles are suppressed.

FIG. 9 is a longitudinal sectional view showing an eighth embodiment of the shower head of the present invention. 10A and 10B are a perspective view of the front side of the shower head shown in FIG. 9 and a perspective view of relevant parts on the back side, respectively.

Regarding the shower head 1g, the same reference numerals are given to the portions common to the shower head 1 shown in FIGS. 1 (a) and 1 (b) in FIGS. 9 and 10 (a) and 10 (b).

In the shower head 1g, the head body 2 has a vertically long shape. Inside the head body 2, a first introduction flow path 7 for introducing hot water and having a circular cross section is provided. The first introduction flow path 7 has an inlet 8 at the lower end of the head body 2 and an outlet 9 at the upper end. The first introduction flow path 7 extends in the length direction of the head main body 2, and the outlets 9 are provided at two locations on the top and bottom. A gas-liquid mixing unit 11 is connected near the inlet 8 of the first introduction flow path 7.

In the gas-liquid mixing part 11, a second introduction channel 12 having a circular cross section is formed, in which hot water is introduced and delivered to the inlet 8 of the first introduction channel 7. The second introduction flow path 12 has a pressurization part 14 whose inner diameter decreases rapidly in the length direction of the second introduction flow path 12 at the lower end, and communicates with the pressurization part 14 on the outlet 15 side. A pressure reducing part 16 whose inner diameter gradually increases toward the outlet 15 is provided. In the second introduction channel 12, the outlet 15 coincides with the inlet 8 of the first introduction channel 7, and the second introduction channel 12 communicates with the first introduction channel 7.

Further, in the gas-liquid mixing unit 11, a gas introduction having a gas passage such as air, oxygen, carbon dioxide gas, ozone or the like in the vicinity of the connection part between the pressurization unit 14 and the decompression unit 16 in the second introduction channel 12. A tube (not shown) is connected orthogonally to the gas-liquid mixing unit 11. The gas introduction tube extends toward the outside of the gas-liquid mixing unit 11, has an inlet at the tip thereof, and has an outlet at a portion disposed closest to the gas-liquid mixing unit 11. Further, in the gas-liquid mixing unit 11, a communication path (not shown) is formed inside between the second introduction flow path 12 and the outlet of the gas introduction pipe. The ventilation path of the gas introduction pipe communicates with the second introduction flow path 12 through the communication path.

Such an arrangement position of the gas-liquid mixing unit 11 is not limited to the upstream side of the first introduction flow path 7, and can be in the middle of the first introduction flow path 7.

Further, the head body 2 is provided with two third introduction passages 25 having a circular cross section for sending hot water introduced into the first introduction passage 7 to the discharge passage 4. The third introduction flow paths 25 are arranged one by one above and below the head body 2, and communicate with the first introduction flow path 7 with the inlets 26 aligned with the outlets 9 of the first introduction flow paths 7. Further, the third introduction flow path 25 is disposed substantially orthogonal to the first introduction flow path 7.

And the 3rd introduction flow path 25 has the flow path expansion part 29 in which an internal diameter gradually expands toward the exit 28 and the cross-sectional area increases gradually on the exit 28 side. In the flow path enlargement part 29, it curves so that an inner surface may spread outside as it goes to the exit 28. FIG.

In the head body 2, the hot water introduction flow path 30 is formed by the first introduction flow path 7, the second introduction flow path 12 and the third introduction flow path 25 as described above. Hot water introduced into the introduction flow path 30 and flowing out from the introduction flow path 30 is discharged from a water spray hole 31 formed in the water spray plate 3.

The water spray plate 3 has a rectangular shape in front view as shown in FIG. The water spray holes 31 are arranged in the vertical and horizontal directions of the water spray plate 3. The portion of the water spray plate 3 where at least the water spray holes 31 are formed has a thin flat plate shape, and the water spray holes 31 penetrate the flat plate portion in the plate thickness direction.

Further, as shown in FIG. 9, in the water spray plate 3, a swirl flow generation flow path 41 for generating a swirl flow in the hot water flow is provided on the upstream side of the sprinkling holes 31. The swirl flow generating channel 41 is formed as a rectangular recess in plan view, in which the water spray plate 3 is cut out in the thickness direction. The swirl flow generation channel 41 has a relationship of l <d, where l is the length of the hot water discharge direction toward the sprinkling hole 31 and d is the length d of the hot water introduction direction orthogonal to the length l. ing. That is, in the swirl flow generation channel 41, the length l in the discharge direction toward the water spray hole 31 is shorter than the length d in the hot water introduction direction orthogonal to the length l. Such a swirl flow generation flow path 41 communicates with both the discharge flow path 4 and the water spray holes 31.

Such a watering plate 3 is attached to the front side of the upper end portion of the head body 2 via an O-ring 34. The O-ring 34 ensures water tightness between the water spray plate 3 and the head main body 2.

In the shower head 1 to which the water spray plate 3 is attached, a hot water discharge channel 4 is formed between the head body 2 and the water spray plate 3. That is, a narrow gap between the head body 2 and the water spray plate 3 serves as the discharge flow path 4. The discharge channel 4 is disposed in parallel to the water spray plate 3, communicates with the introduction channel 30 of the head body 2, and communicates with the swirl flow generation channel 41 of the water spray plate 3.

Further, the discharge flow path 4 is disposed substantially orthogonal to the outlet side portion of the introduction flow path 30, that is, the third introduction flow path 25. And in the discharge flow path 4, the inlet 35 which corresponds to the downstream end of the flow-path expansion part 29 which is an exit of the introduction flow path 30 has the cross-sectional area which has the following relationship. That is, the cross-sectional area of the inlet 35 is, for example, a unit in a portion excluding the flow path expanding portion 29 of the introduction flow path 30 where the washer-like volume of the hot water flowing into the discharge flow path 4 per unit time of about 0.1 seconds. It is set so as to be equal to or less than the disk-shaped volume of hot water passing through per hour. This cross-sectional area is an area of a cross section perpendicular to the direction of hot water flowing through the introduction flow path 30.

The swirl flow generation flow path 41 is disposed so as to spread outside the discharge flow path 4. Further, in the swirl flow generation channel 41, the length 1 in the hot water discharge direction is longer than the interval between the head body 2 and the water spray plate 3 where the discharge channel 4 is formed.

And in the shower head 1, the fine bubble production | generation unit 42 is formed of the discharge flow path 4 and the swirl flow generation flow path 41 as described above. Two fine bubble generating units 42 are provided in the shower head 1 and are arranged side by side in the length direction of the head body 2.

FIG. 11 is a perspective view showing the watering plate in the shower head shown in FIG. 9 from the back side thereof. 12A and 12B are a rear view of the water spray plate shown in FIG. 11 and a cross-sectional view of the main part in the width direction of the shower head shown in FIG.

11 and 12 (a) and 12 (b), the two fine bubble generating units 42 are arranged above and below the water spray plate 3. The upper fine bubble generating unit 42a and the lower fine bubble generating unit 42b are partitioned by ribs 43 provided at the boundary between them. The rib 43 is erected on the water spray plate 3, extends in the width direction of the water spray plate 3, and protrudes from a boundary portion of the swirl flow generation flow channel 41 of the fine bubble generating units 42 a and 42 b. On the other hand, the left and right ends of the rib 43 are disposed on the inner side of the side end of the swirl flow generation flow path 41, and a communication portion 44 is formed between the left and right ends of the rib 43 and the side end of the swirl flow generation flow path 41. Has been. By the communication part 44, the adjacent swirl flow generation flow paths 41 in the fine bubble generating units 42a and 42b communicate with each other.

Such a shower head 1 g can discharge hot water containing a large number of fine bubbles having a diameter of 50 μm or less from the sprinkling holes 31. The shower head 1g is connected to a water pipe such as a hose through which hot water passes and an inlet of the gas-liquid mixing unit. Hot water introduced into the second introduction flow path 12 of the gas-liquid mixing unit 11 through the water pipe is once pressurized when passing through the pressurizing unit 14 and then depressurized when passing through the decompression unit 16. Along with the decompression at this time, a gas such as air, oxygen, carbon dioxide, or ozone is sucked into the air passage of the gas introduction pipe. The sucked gas passes through the communication path and is mixed as bubbles in the hot water introduced into the second introduction flow path 12. As a result, hot and cold water is introduced into the first introduction flow path 7 from the outlet 15 of the second introduction flow path 12 through the inlet 8 as a gas-liquid mixed fluid.

Hot water introduced into the first introduction channel 7 flows out from the outlet 9 and is introduced into the third introduction channel 25 through the inlet 26. When the hot water introduced into the third introduction flow channel 25 passes through the flow channel expansion portion 29, it flows outward along the inner surface of the flow channel expansion portion 29 and flows from the outlet 28 of the third introduction flow channel 25. It is introduced into the discharge channel 4 through the inlet 35. Since the flow path expanding portion 29 is curved so that the inner surface spreads outward, the occurrence of turbulent flow such as vortex in the hot water flowing out from the outlet 28 is suppressed. Collisions between the bubbles accompanying the generation of turbulent flow are suppressed, and coalescence of the bubbles is suppressed.

In the inlet 35 of the discharge flow path 4, the volume of hot water flowing into the discharge flow path 4 per unit time is equal to or less than the volume of hot water passing per unit time in a portion of the introduction flow path 30 excluding the flow path expansion portion 29. Since it has a cross-sectional area, hot water introduced into the discharge flow path 4 is pressurized. In the discharge flow path 4, since the cross-sectional area of the portion downstream from the inlet 35 is larger than the cross-sectional area of the inlet 35, the pressure is gradually reduced. As a result of the pressurization and decompression, the bubbles in the hot water are crushed and most of them become fine bubbles. As described above, since the generation of turbulent flow is suppressed in the hot water containing fine bubbles as described above, it flows almost radially toward the outer peripheral portion of the discharge flow path 4 and is introduced into the swirl flow generation flow path 41. Is done.

When the hot water introduced into the swirl flow generation flow channel 41 is introduced into the swirl flow generation flow channel 41, it collides with the side end surface of the swirl flow generation flow channel 41, and the flow is substantially perpendicular to the sprinkling hole 31 side. It can be bent. For this reason, a swirling flow is temporarily generated in the hot water introduced into the swirling flow generating channel 41. However, this swirl flow is generated due to a difference in fluid action force between the flow of hot water toward the sprinkling hole 31 and the flow of hot water flowing into the swirl flow generation flow channel 41 from the discharge flow channel 4. Collapses soon due to shear force. The hot water may contain some large bubbles having a relatively large diameter, and the large bubbles are generally easily trapped at the center of the swirling flow. However, as the swirling flow collapses, the large bubbles are released from restraint and are crushed by the shearing force, so that they become fine bubbles. The refinement of bubbles contained in the hot water is promoted by the swirling flow generated in the swirling flow generating channel 41 and its collapse, and hot water containing many fine bubbles is generated.

Such hot water containing a large number of fine bubbles is discharged to the outside of the shower head 1g through the water spray holes 31. Since the diameter of the fine bubbles is much smaller than the inner diameter of the water spray hole 31, it can easily pass through the water spray hole 31. The hot water containing many fine bubbles discharged from the shower head 1g has a high cleaning function and the like because the fine bubbles have a large specific surface area.

As described above, the shower head 1g basically includes the head body 2 in which the introduction flow path 30 is provided and the gas-liquid mixing unit 11 is provided on the upstream side of the introduction flow path 30, and the plurality of water spray holes 31. And a water spray plate 3 in which a swirl flow generation flow channel 41 is recessed, and a discharge flow channel 4 formed between the head main body 2 and the water spray plate 3. Therefore, the shower head 1g has a simplified configuration while promoting generation of hot water containing a large number of fine bubbles. The shower head 1g is considered promising as being versatile.

Moreover, in the swirl flow generation flow path 41, when the length in the discharge direction toward the water sprinkling hole 31 is l and the length in the introduction direction orthogonal to the length l is d, there is a relationship of l <d. Therefore, the difference in the force acting on the hot water in the hot water sprinkling direction and the hot water introduction direction becomes large. Due to this difference in force, the shearing force due to the swirling flow generated in the swirling flow generating channel 41 becomes larger, and the crushing of the bubbles is further promoted and functions effectively for miniaturization. The hot water discharged from the sprinkling holes 31 is of a high quality with a higher density of fine bubbles. In addition, shortening the length l in the water spraying direction contributes to downsizing of the shower head 1g.

In the shower head 1g, each cross section in the length direction of the flow path expanding portion 29 of the introduction flow path 30, that is, a cross section perpendicular to the flowing direction of the hot water, has a volume of hot water passing per unit time. Can have a cross-sectional area equal to. In the shower head 1g having such a flow passage expanding portion 29, it is possible to suppress a decrease in the flow velocity when hot water passes through the flow passage expanding portion 29, and as a result, the collision of bubbles in the hot water is further suppressed. And the coalescence of bubbles is further suppressed. The expansion of bubbles and the accompanying decrease in the number of bubbles are suppressed.

In the shower head 1g, since the two fine bubble generating units 42a and 42b formed by the discharge flow path 4 and the swirl flow generation flow path 41 are arranged side by side in the length direction of the head body 2, Hot water containing many bubbles can be sprinkled over a wide area. Moreover, since the adjacent swirl flow generating channels 41 in the fine bubble generating units 42a and 42b communicate with each other by the communication portion 39, the pressure difference between the fine bubble generating units 42a and 42b can be suppressed to a small value. . For this reason, the momentum of the hot water discharged from the sprinkling holes 31 and containing a large number of fine bubbles becomes uniform, and a high-quality shower can be realized.

13 (a), 13 (b), and 13 (c) are perspective views showing a main part of a shower head according to a ninth embodiment of the present invention, an AA sectional view of FIG. 13 (a), and FIG. FIG. With respect to the shower head 1h, portions common to the shower head 1g shown in FIGS. 9 to 12 are denoted by the same reference numerals in FIG. 13, and description thereof is omitted below.

In the shower head 1h, a plurality of sprinkling protrusions 45 having a cylindrical shape stand on the surface of a flat plate portion 3a as a flat plate portion that forms the discharge channel 4 between the water spray plate 3 and the head body 2. It is installed. A water spray hole 31 is formed in the inside of the water spray protrusion 45 and the flat plate portion 3 a corresponding to the inside, and the water spray hole 31 communicates with the discharge flow path 4. Moreover, the water spray hole 31 is arrange | positioned at the center part when the water spray protrusion 45 is seen from the front end side. Such a water spray plate 3 is formed of an elastic material such as rubber including the water spray protrusion 45.

Further, in the shower head 1h, a head cover 46 is provided outside the water spray plate 3, and a through hole is formed in the head cover 46 at a portion corresponding to the water spray protrusion 45. The water spray plate 3 can be attached to the back surface side of the head cover 46 by utilizing its elasticity, and when the water spray plate 3 is attached to the head cover 46, the water spray protrusion 45 protrudes outside through the through hole. . The length of the sprinkling protrusion 45 is set such that the sprinkling protrusion 45 slightly protrudes from the surface of the head cover 46 when the sprinkling plate 5 is attached to the head cover 46 so that such a protrusion is possible. Has been.

On the other hand, the surface of the head cover 46 is formed in a curved shape. For this reason, the entire shape of the shower head 1h has a cylindrical shape. Here, the cylindrical shape includes not only a complete cylinder but also a shape that is visually deformed as a whole even if it is slightly deformed from the complete cylinder. Thus, since the surface of the head cover 46 is formed in a curved surface shape, the shower head 1h has a good appearance even if the water spray plate 3 has the flat plate portion 3a.

In the shower head 1h, with use, foreign matters such as scale due to calcium in the components dissolved in water are deposited in the water spray holes 31 near the tip of the water spray protrusion 45 and gradually accumulate. To go. As a result, clogging may occur in the watering hole 31 near the tip of the watering protrusion 45. However, as described above, the water spray protrusion 45 slightly protrudes from the surface of the head cover 46 and is formed of a material having elasticity. For this reason, it is possible to easily remove the foreign matter by taking it out or crushing it by elastically deforming the portion of the sprinkling protrusion 45 protruding from the surface of the head cover 46 with a finger.

The shower head of the present invention is not limited to the above embodiment. Various modes are possible for details such as the shape and configuration of the head main body, water spray plate, discharge flow channel and swirl flow generation flow channel, the configuration and arrangement position of the gas-liquid mixing unit, and the number of fine bubble generating units.

DESCRIPTION OF

SYMBOLS

1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h Shower head 2 Head main body 3 Sprinkling plate 3a Flat plate part as flat part 4 Discharge flow path 11 Gas-

liquid mixing part

29, 29a Flow path expansion part 30 Introducing

flow path

31, 31a Sprinkling hole 35 Discharge flow path inlet 36 Sprinkling hole inlet 37 Pressurizing section 38 Sprinkling hole outlet 39 Decompression section 40 Rib 41 Swirl flow generating flow paths 42, 42a, 42b Fine bubble generating unit 44 Communication part l Discharge length of hot water in the swirl flow generation flow path d Introduction length in the swirl flow generation flow path

The shower head of the present invention has a simplified configuration, and can suppress the coalescence of bubbles and promote the generation of fine bubbles.

Claims

A hot water introduction flow path is formed inside, and a gas-liquid mixing section is provided on the upstream side of the introduction flow path for sucking gas by decompression when hot water is introduced and mixing the sucked gas into the hot water as bubbles. The head body,
A water spray plate having a flat plate-like portion, wherein a plurality of water spray holes are formed through the flat plate portion in the thickness direction, and are arranged outside the outlet of the introduction flow path and attached to the head body. When,
A hot water discharge channel formed between the head body and the water spray plate and disposed in parallel to the water spray plate, and communicated with the introduction flow channel;
The introduction flow path has a flow path expansion portion whose cross-sectional area gradually expands toward the outlet on the outlet side thereof,
The discharge channel is disposed substantially orthogonal to the outlet side portion of the introduction channel, and the inlet of the discharge channel has a volume of hot water flowing into the discharge channel per unit time. A shower head having a cross-sectional area equal to or less than the volume of hot water passing per unit time in a portion of the passage excluding the flow passage enlarged portion.
Each of the cross-sections in the length direction of the introduction channel has a cross-sectional area in which the volume of hot water passing per unit time is equal for each cross-section. Item 10. A shower head according to item 1.
The shower head according to claim 1 or 2, wherein the watering hole formed in the watering plate has a pressurizing part on the inlet side and a pressure reducing part on the outlet side.
The discharge channel is provided with a plurality of ribs along a flow direction of hot water in the discharge channel, and the discharge channel is partitioned by the ribs. 4. The shower head according to any one of 3.
The shower head according to claim 4, wherein the ribs are arranged one by one between two adjacent watering holes.
In the water spray plate, a swirl flow generation flow path for generating a swirl flow in the hot water is recessed upstream of the water spray hole, and the swirl flow generation flow path communicates with both the discharge flow path and the water spray hole. The shower head according to claim 1, wherein the shower head is disposed so as to spread outward from the discharge flow path.
The shower according to claim 6, wherein in the swirl flow generation flow path, the length of the hot water discharge direction toward the water spray hole is shorter than the length of the hot water introduction direction orthogonal to the length. head.
The fine bubble generation unit is formed by the discharge flow path and the swirl flow generation flow path, and a plurality of the fine bubble generation units are provided side by side in the length direction of the head body. The shower head according to 6 or 7.
The shower head according to claim 8, wherein, in two adjacent microbubble generating units, the adjacent swirl flow generating flow paths communicate with each other through a communication portion.