JP3273198B2 - Shower nozzle for squall shower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squall shower for installing raindrop-shaped showers having a large size and a uniform particle size, installed alone or in combination with another nozzle in a bathroom or shower unit. For shower nozzles.

[0002]

2. Description of the Related Art Shower nozzles can be broadly classified into a type in which water is diffused by utilizing centrifugal force and a type in which water is diffused through slits or a large number of nozzle holes. It is known as a shower nozzle for a so-called squall shower because it can produce a large raindrop-shaped shower.

[0003] This has a core inside a nozzle tube, and the core can impart rotation to supplied water. The water that has passed through the core is reduced in diameter toward the nozzle hole, thereby accelerating the rotation, and is discharged at a stretch through the nozzle hole. Then, the water discharged at this time becomes large raindrops by the centrifugal force and scatters in a circular shape from the nozzle hole. In addition, the inner surface of the nozzle hole serving as a water passage is generally smoothed in order to reduce the fluid resistance.

[0004]

According to this conventional technique, the water discharged from the nozzle hole has a relatively low peripheral speed at the center of the nozzle hole and becomes maximum at the outer peripheral portion. There was a problem that the particle size did not become uniform squall as a whole. That is, the high peripheral speed portion of the outer peripheral portion has an extremely small particle diameter, and water is scattered as mist-like water droplets, while the low peripheral speed portion of the central portion has a small force to scatter, This is because there is a tendency that the particle size becomes large. In addition, mist-like water droplets having a small particle size present around the shower generally have a low sensible temperature and are too irritating to the skin, and thus significantly impair the feeling of use of the shower.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shower nozzle for a squall shower capable of generating a large, uniform particle size shower without mist-like water droplets by forming a guide groove on the inner surface of the nozzle hole. Is to provide.

[0006]

According to the present invention, there is provided a nozzle tube having a nozzle hole on the discharge side and an inner hole, a core loaded on the inlet side of the nozzle tube,
An adapter pipe connected to the introduction side of the nozzle pipe, the core has a plurality of inclined guide holes formed in the outer peripheral part, and the nozzle pipe narrows the diameter of the inner hole toward the nozzle hole, The gist of the invention is to form a guide groove for suppressing the peripheral speed on the inner surface of the nozzle hole.

The nozzle tube can be connected to the adapter tube so as to swing freely.

[0008]

According to the structure of the invention, the nozzle tube is
Water can be connected to the water supply pipe via the adapter pipe, and the water fed into the nozzle pipe is given rotation according to the direction of the guide hole by passing through the guide hole of the core,
Enter the nozzle hole. At this time, since the inner hole is narrowed in diameter toward the nozzle hole, water traveling in the inner hole is
It can be accelerated enough.

On the other hand, since a guide groove for suppressing the peripheral speed of water is formed on the inner surface of the nozzle hole, the peripheral speed at the outer peripheral portion of the water flow is extremely reduced in the nozzle hole. Can be discharged to the outside as a uniform shower as a whole without harmful mist-like water droplets.

When the nozzle tube is swingably connected to the adapter tube, the direction of the shower can be arbitrarily adjusted.

[0011]

Embodiments will be described below with reference to the drawings.

A shower nozzle for a squall shower is constructed by integrally assembling a nozzle tube 10 and an adapter tube 20 (FIG. 1).

The nozzle tube 10 has an inner hole 11 and a nozzle hole 12 continuous with the inner hole 11. Nozzle tube 10
A short trumpet-shaped flange portion 14 is formed on the outer periphery on the introduction side of the nozzle so that a spherical portion 13 is formed on the discharge side, and an expansion portion 12b continuous with the nozzle hole 12 is formed on the discharge side. 1 and 2). Further, the inner hole 11 is provided with the nozzle hole 12.
It is a tapered hole that narrows the diameter toward. An annular step 11a is formed in a part of the introduction side of the inner hole 11, and a ring groove 11b is formed in the inner surface near the opening end on the introduction side. In addition, the nozzle hole 12 is a straight hole having the same diameter as the minimum diameter portion of the inner hole 11, and the inner surface thereof has
Guide grooves 12a are formed. Each guide groove 1
2a is a V-shaped groove whose depth increases toward the discharge side, and is provided at equal intervals in the circumferential direction of the nozzle hole 12. However,
Each guide groove 12a may have a uniform depth.

A core 15 is loaded on the introduction side of the inner hole 11.

The core 15 is formed in a thick disk shape. A center hole 15c is provided in the center of the core 15,
Guide holes 15b are formed in the outer peripheral portion (FIG. 2). Each guide hole 15b is a groove having an open outer peripheral side, and is formed obliquely so as to have an inclination angle θ1 with respect to the center line CL (FIGS. 2 and 3). Therefore, each guide hole 15b and the center line CL have a torsion relationship. The core 15 is prevented from dropping by dropping it into the step 11a of the inner hole 11 and inserting a retaining ring 16 into the ring groove 11b.

The adapter tube 20 has a cylindrical portion 22a on the introduction side.
And an intermediate nut portion 23 and a discharge-side cylindrical portion 22b (FIG. 1). The adapter tube 20 has a tapered hole 21 that expands toward the nozzle tube 10.
Inserts a part of the spherical portion 13 into the tapered hole 21,
The spherical portion 13 is positioned so as to be in contact with the tapered hole 21.

The nozzle tube 10 and the adapter tube 20 are connected via a fastening nut 30.

The fastening nut 30 holds a sliding contact ring 32 at an intermediate portion on the inner side, and female screws 31, 33 having different diameters above and below it.
Is a special nut. The fastening nut 30 is connected to the upper internal thread 31 with respect to the cylindrical portion 2 on the discharge side of the adapter tube 20.
An external thread 24 formed on the outer periphery of 2b is engaged with the adapter tube 20 by screwing. At this time,
The nozzle tube 10 is connected to the adapter tube 2 via a sliding ring 32.
It is pressed to the 0 side, and is fixed to the adapter tube 20 so as to swing freely. The cylindrical portion 22 of the adapter tube 20
O-rings 25 and 26 are mounted between the base of b and the end face on the discharge side between the fastening nut 30.

A holding ring 40 is attached to the fastening nut 30. The press ring 40 includes a cylindrical portion 43 having an external thread 43a on the outer periphery, and a flange portion 42 connected to the cylindrical portion 43.
And a knurl 4 on the outer periphery of the flange portion 42.
2a is formed. Further, a large-diameter tapered hole 41 that expands toward the discharge side is formed inside the holding ring 40. The presser ring 40 has the male screw 4 of the cylindrical portion 43.
By screwing the 3a into the lower internal thread 33 of the fastening nut 30, the fixing member M is sandwiched between the lower end surface of the fastening nut 30 and the flange portion 42, and the whole can be fixed. At this time, the force of the press ring 40 is not applied to the nozzle tube 10, and the nozzle tube 10 is
The direction can be arbitrarily adjusted inside the device. A packing 44 is provided on the upper surface side of the flange portion 42.
It is good to put on.

Such a shower nozzle for squall shower can generate a shower having a uniform particle diameter as a whole by supplying water through an adapter tube 20.

The water supplied through the adapter tube 20 is
After passing through the center hole 15c of the core 15 and the guide holes 15b, 15b,..., It flows into the inner hole 11 of the nozzle tube 10. At this time, the water flow passing through the center hole 15c goes straight along the center line CL, while the water flow passing through the guide holes 15b, 15b skews along the inclination angle θ1 of each guide hole 15b (FIG. 3, arrows K, K... In FIG. 4). That is, the water flowing into the inner hole 11 of the nozzle tube 10 via the core 15 is given a necessary and sufficient rotation so that the peripheral speed V increases from the center to the outer periphery (FIG. 5 (A) (solid line), and enters the nozzle hole 12.

On the other hand, the nozzle hole 12 has a guide groove 1
2a, 12a,... Are formed, the water discharged from the nozzle hole 12 has a reduced peripheral speed V at the outer peripheral portion (two-dot chain line in FIG. 3). It can fly as a shower so as to draw a circle having a radius R1 determined by its maximum peripheral speed Vm (FIG. 4).

The particle size δ of the shower obtained at this time is
Can have a trapezoidal distribution that is sharply cut at both ends of the diameter d of the nozzle hole 12 (two-dot chain line in FIG. 5B). Does not occur. On the other hand, when the guide grooves 12a, 12a,... Are not provided in the nozzle hole 12, the peripheral velocity V becomes maximum at the outer peripheral portion of the water flow.
2 is broadly distributed on both sides of the diameter d (solid line in the figure),
Showers are accompanied by large amounts of mist. That is, the guide grooves 12a, 12a... Can suppress the peripheral speed V of the outer peripheral portion of the water flow so that the region W1 where the water droplets scatter in the form of a mist outside the shower is negligible (FIG. 4). ).

[0024]

[Other Embodiments] Guide grooves 12a, 1 provided in a nozzle hole 12
.. May be any shape as long as the peripheral speed of the water flow can be appropriately suppressed (FIG. 6). For example, shallow guide grooves 12a, 12a,... Having a U-shaped cross section are continuously formed (FIG. 1A), and deep guide grooves 12a, 12 having a U-shaped cross section.
.. can be formed symmetrically (FIG. (B)), or the guide grooves 12a having a rectangular cross section can be formed symmetrically (FIG. (C)). In any case, two or more guide grooves 12a, 12a,... Are preferably arranged at equal intervals in order to scatter the water flow in a well-formed conical shape.

The guide grooves 12a, 12a,... May be formed on the inner surface of the nozzle hole 12 at a slight angle instead of being formed parallel to the center line CL. At this time,
Each guide groove 12a is formed by the inclination angle θ of the guide hole 15b of the core 15.
By tilting in the opposite direction to 1, a more remarkable peripheral speed suppressing effect can be realized.

[0026]

As described above, according to the present invention, the core is loaded on the introduction side of the inner hole of the nozzle tube, and the guide groove for suppressing the peripheral speed of the water flow is formed on the inner surface of the nozzle hole. By this, the core gives rotation to the water flow, and the guide groove of the nozzle hole can reduce the peripheral speed of the outer periphery of the water flow, so that mist-like water droplets with a small particle size scatter around the shower. Therefore, there is an excellent effect that the entire water stream can be discharged as a uniform squall-like shower.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire configuration.

FIG. 2 is an exploded perspective view of a main part.

FIG. 3 is a schematic explanatory view (1).

FIG. 4 is a schematic explanatory view (2).

FIG. 5 is an operation explanatory diagram.

FIG. 6 is a sectional view taken along line XX of FIG. 2 showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Nozzle tube 11 ... Inner hole 12 ... Nozzle hole 12a ... Guide groove 15 ... Core 15b ... Guide hole 20 ... Adapter tube

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-286051 (JP, A) JP-A-3-123547 (JP, U) JP-B-59-27629 (JP, B2) (58) Investigated Field (Int.Cl. ⁷ , DB name) B05B 1/14-1/22 B05B 1/34 101 B05B 3/02-3/12 A47K 3/28

Claims (2)

(57) [Claims] 1. A nozzle tube having a nozzle hole on the discharge side and an inner hole, a core loaded on the introduction side of the nozzle tube, and an adapter tube connected to the introduction side of the nozzle tube. The nozzle has a plurality of inclined guide holes formed in an outer peripheral portion thereof, and the nozzle tube narrows the diameter of the inner hole toward the nozzle hole and forms a guide groove for suppressing the peripheral speed of the water flow in the nozzle hole. A shower nozzle for squall shower formed on an inner surface. 2. The shower nozzle for a squall shower according to claim 1, wherein the nozzle tube is connected to the adapter tube so as to swing freely.