JP2006175294A - Liquid nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid nozzle capable of effectively reducing an injection noise. <P>SOLUTION: A mesh body 28 surrounding a periphery at a delivery side is provided on an inner surface 25a of the delivery side of a delivery hole of the liquid nozzle 18 with a clearance T with the inner surface 25a of the delivery side and a sound-absorption material 29 is arranged in the clearance T. The injection noise generated on the liquid nozzle 18 can be effectively reduced by synergizing reduction of the injection noise by the sound-absorption material 29 to reduction of the injection noise by the mesh body 28. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid nozzle that can reduce ejection noise.

Conventionally, a gas-liquid dissolved fluid in which gas is pressurized and dissolved in a liquid is released by a pressure reducing valve (liquid nozzle) and ejected from a discharge hole into a bath tub while generating fine bubbles. There is a bubble generator (see, for example, Patent Document 1).
JP-A-11-33071

  However, there is a problem that the injection noise generated when the fine bubbles are generated by the pressure reducing valve (liquid nozzle) is directly radiated from the bathtub into the bathroom.

  In addition, there is a similar problem in a jet bath apparatus that strongly jets and discharges liquid from a discharge hole into a bath tub together with relatively large bubbles.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid nozzle that can effectively reduce the injection noise.

  In order to solve the above-described problems, the liquid nozzle of the present invention is provided with a mesh body that surrounds the discharge side inner surface with a gap between the discharge side inner surface and the discharge side inner surface of the liquid nozzle. A sound absorbing material is arranged.

  In order to make the inside of a bathroom quiet, the liquid nozzle may be a pressure reducing valve of a fine bubble generating device or a jet nozzle of a jet bath device.

  According to the present invention, since the mesh body is provided with a gap between the discharge side inner surface of the liquid nozzle and the sound absorbing material is disposed in the gap, the liquid nozzle is caused by the diffusion attenuation (rectification) action of pulsation by the mesh body. The generated injection noise is reduced. In addition, noise is further reduced by the rectification of fine eddy currents on the surface of the sound-absorbing material, and in addition, the pulsation absorption and attenuation effect of the sound-absorbing material results in the injection noise generated by the liquid nozzle and the friction noise generated by friction with the mesh body In combination with the reduction of the mist, the injection noise generated by the liquid nozzle is effectively reduced as compared with the case of only the mesh body. Furthermore, since the sound absorbing material is arranged on the back side of the mesh body, the sound absorbing material does not become a resistance to the jet liquid flow, and the sound absorbing material does not scatter in the jet liquid flow.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 4 (a), the fine bubble generating device A has a suction port 2 and a discharge port 3 formed in the bathtub wall 1 a of the bathtub 1, and the suction port 2 is sucked through the connection pipe 4. Connected to the inlet of the section (ejector) 5, the outlet of the air suction section 5 is connected to the pump 7 via the connecting pipe 6.

  A connecting pipe 9 of the oxygen enrichment device 8 is connected to the side of the air suction unit 5. Although not specifically shown, the oxygen-enriching device 8 is composed of an oxygen-enriched film and a vacuum pump. The oxygen-enriched film 8 is an oxygen-enriched film made of a flat organic polymer film by taking in air in the atmosphere with the vacuum pump. When passing air, oxygen and nitrogen decelerate, but oxygen passes at a rate 2.5 times that of nitrogen. As a result, the normal air was 78% nitrogen and 21% oxygen, but the oxygen-enriched film made the air 69% nitrogen and 30% oxygen, and the oxygen-enriched high oxygen concentration Can get the air.

  The pump 7 is connected to a spray nozzle 15 provided on the upper portion of the gas-liquid dissolution tank 14 via a connecting pipe 13, and the gas-liquid dissolution tank 14 is provided with an air vent valve 16.

  A lower part of the gas-liquid dissolution tank 14 is connected to the discharge port 3 via a connection pipe 17, and a pressure reducing valve (liquid nozzle) 18 is installed in the discharge port 3.

  And if the pump 7 is driven by switch operation, the bath water in the bathtub 1 will be absorbed by the pump 7 via the connection pipes 4 and 6 from the suction inlet 2, and the air suction part (ejector) in the middle of that Due to the negative pressure action of 5, high oxygen concentration air taken in from the oxygen enricher 8 through the connecting pipe 9 is mixed into the bath water.

  The bath water mixed with the air is jetted from the spray nozzle 15 into the gas-liquid dissolution tank 14 through the connecting pipe 13 from the pump 7 and enters a bubbling state. Excess air in the gas-liquid dissolution tank 14 is discharged from the air vent valve 16 to the outside of the tank.

  The bath water in the gas-liquid dissolution tank 14 is discharged into the bathtub 1 from the discharge port 3 while being converted into bath water containing white fine cloudy bubbles by the pressure reducing valve 18 through the connection pipe 17. .

  By repeating such circulation of the bath water, the inside of the bathtub 1 is filled with bath water with fine bubbles.

  FIG. 1A is a side cross-sectional view of the pressure reducing valve 18 installed in the discharge port 3. A ring-shaped packing 20 is attached to the inner peripheral edge of the discharge port 3, and a bathtub fixture 21 is fitted into the packing 20 in a watertight manner from the inside of the bathtub 1, and at the rear end 21 a of the bathtub fixture 21. The front end flange portion 17a of the connecting pipe 17 is watertightly connected. A discharge port cover 22 having an opening 22 a is attached to the flange portion 21 b of the bathtub fixture 21.

  The pressure reducing valve 18 is installed across the inside of the bathtub fixture 21 and the inside of the front end flange portion 17 a of the connecting pipe 17. The pressure reducing valve 18 includes a supply side nozzle portion 23 and a discharge side nozzle portion 24.

  The supply-side nozzle portion 23 includes a substantially cylindrical supply-side nozzle body 23a, and a decompression opening 23b is formed at the center of the supply-side nozzle body 23a. The decompression opening 23b is for discharging the pressure-dissolved gas-liquid dissolution bath water and releasing the pressure. A smooth opening peripheral surface 23c is formed at the opening periphery of the decompression opening 23b. An arc concave ring groove 23d (see FIG. 1B) is formed on the peripheral edge surface 23c along the periphery of the decompression opening 23b.

  The discharge-side nozzle portion 24 includes a substantially cylindrical discharge-side nozzle body 24a. At the rear end of the discharge-side nozzle body 24a, the discharge-side nozzle body 24a faces the decompression opening 23b and has a predetermined gap S from the opening peripheral surface 23c. A pressure release surface 24b is formed separating the two. A plurality of discharge holes 24d (see FIG. 1C) are formed in the discharge side nozzle body 24a at equal circumferential intervals (45 degrees in this example). The discharge holes 24d are for injecting and discharging fine bubbles generated at an interval S between the opening peripheral surface 23c and the pressure release surface 24b into the liquid tank 1.

  The discharge side nozzle portion 24 is provided with a nozzle cover 25 that forms the periphery of the discharge side of the discharge hole 24d, and an opening 25a that opposes the opening 22a of the discharge port cover 22 is formed on the upper portion thereof, A step portion 25b is formed on the inner peripheral surface so as to be wider than the outer periphery of the discharge hole 24d. The step portion 25b is formed by screwing a female screw formed on the inner periphery of the nozzle cover 25 into a male screw formed on the outer periphery on the front end side of the discharge side nozzle main body 24a with the discharge side nozzle main body 24a and the nozzle cover 25 as separate bodies. This occurs when combined.

  The pressure reducing valve 18 is a seal ring of the supply-side nozzle main body 23 a in a state where the position in the front-rear direction is regulated between the concave portion 22 b of the opening 22 a of the discharge port cover 22 and the flange portion 21 b of the bathtub fixture 21. 26 is water-tightly fitted inside the front end flange portion 17a of the connection pipe 17.

In the configuration of the pressure reducing valve 18, when the gas-liquid dissolving bath water pressurized and dissolved from the connecting pipe 17 is supplied (see arrow P), the opening peripheral surface 23 c and the pressure release from the pressure reducing opening 23 b of the supply side nozzle body 23 a. Since the pressure is rapidly reduced in the process of flowing in the gap S between the surface 24b, the air (gas) in the bath water boiles under reduced pressure to generate fine bubbles, which are converted into bath water containing white fine cloudy bubbles. Then, the liquid is discharged from the discharge port 3 into the bathtub 1. At this time, since the turbulent flow of the bath water can be suppressed by the arc-shaped concave ring groove 23d of the supply side nozzle main body 23a, the noise generated by the turbulent flow in this portion can be effectively reduced.

  In the configuration of the pressure reducing valve 18, as shown in FIGS. 2A and 2B, the inner surface 25c of the stage portion 25b of the nozzle cover 25 that forms the discharge inner surface of the discharge hole 24d of the discharge side nozzle portion 24 is formed. A mesh body 28 rounded into a cylindrical shape is provided so as to surround the discharge side periphery of the discharge hole 24d with a gap T therebetween. The mesh body 28 is held in a centered state by fitting the lower outer periphery into a recess 24e formed on the inner periphery on the front end side of the discharge-side nozzle body 24a, and extends between the opening 25a of the nozzle cover 25. Is provided.

  The mesh body 28 is preferably, for example, a wire mesh having a mesh of about # 30 to 120, but may be a mesh-like plastic, or a perforated plate such as punching metal in which a large number of small holes are formed vertically and horizontally. It may be in a shape.

  Further, a sound absorbing material 29 is disposed in the gap T between the mesh body 28 and the inner surface 25 c of the nozzle cover 25. Specifically, a nonwoven fabric (for example, a 3 mm thick material compressed to 1 mm thickness) is wound around and fixed to the outer periphery of the mesh body 28. A gap T may remain between the sound absorbing material 29 and the inner surface 25c, or the gap T may be filled with a nonwoven fabric.

  The nonwoven fabric has a through gap formed by intertwining a large number of fibers. As the sound absorbing material 29, a porous material having a through hole, preferably a continuous foamed material, can be adopted in addition to the nonwoven fabric.

  If the mesh body 28 is provided with a clearance T between the pressure reducing valve 18 and the discharge-side inner surface 25c, and the sound absorbing material 29 is disposed in the clearance T, the pulsation is diffused and attenuated (rectified) by the mesh body 28. ) Due to the action, the injection noise at the time of generation of fine bubbles generated by the pressure reducing valve 18 is reduced. Further, the noise is further reduced by the rectifying action of the fine eddy currents on the surface of the sound absorbing material 29. In addition, the pulsation absorption and damping action of the sound absorbing material 29 causes the injection noise and the mesh when the fine bubbles generated in the pressure reducing valve 18 are generated. Synergistically, the friction noise generated by the friction with the body 28 is reduced, and the injection noise when the fine bubbles generated in the pressure reducing valve 18 are effectively reduced as compared with the case of the mesh body 28 alone. It becomes like this. According to the experiment, it was confirmed that the noise was further reduced by 5 dB in the case where the sound absorbing material 29 was arranged as compared with the case of the mesh body 28 alone.

  Furthermore, since the sound absorbing material 29 is disposed on the back side of the mesh body 18, the sound absorbing material 29 does not become a resistance to the jet liquid flow, and the sound absorbing material 29 is not scattered in the jet liquid flow.

  Furthermore, it is conceivable to add a silencer to the pressure reducing valve 18 as long as the injection noise is reduced, but this may affect the generation of fine bubbles. On the other hand, in this embodiment, since only the mesh body 28 and the sound absorbing material 29 are provided in the pressure reducing valve 18, the generation of fine bubbles is not affected at all.

  Thus, if it is the pressure-reduction valve 18 of the microbubble generator A of the bathtub 1, since the injection noise at the time of microbubble generation can be reduced effectively, the inside of a bathroom will become quiet.

  In the above embodiment, the liquid nozzle (pressure reducing valve 18) of the fine bubble generating device A is used. However, as shown in FIG. 4 (b), it is also applicable to the liquid nozzle (jet nozzle 32) of the jet bath device B. Can do.

  That is, in the jet bath apparatus B, a suction port 33 and a discharge port 34 are formed in the bathtub wall 1a of the bathtub 1, and the suction port 33 and the discharge port 34 are connected by a connecting pipe 35 having a jet pump 36. Yes. A connection pipe 9 of the oxygen enricher 8 is connected to the jet nozzle 32 installed at the discharge port 34.

  When the jet pump 36 is driven by a switch operation, bath water in the bathtub 1 is jetted and discharged from the discharge port 33 into the bathtub 1 while being sucked by the jet pump 36 through the connection pipe 35 from the suction port 33. It becomes like this. At this time, due to the negative pressure action of the jet nozzle 32 of the discharge port 34, high oxygen concentration air taken in from the oxygen enricher 8 through the connection pipe 9 is mixed into the bath water. Bath water containing relatively large bubbles is strongly jetted.

  3A and 3B are a perspective view and a side sectional view of the jet nozzle 32 installed at the discharge port 34. The difference from the pressure reducing valve 18 of the fine bubble generator A is that the supply side nozzle Since the portion 23 and the discharge side nozzle portion 24 are configured by a nozzle portion 37 in which the portion 23 and the discharge side nozzle portion 24 are integrated, and only a thin opening 37a is formed at the center of the nozzle portion 37, detailed description thereof is omitted.

  If the mesh body 28 is provided with a gap T between the jet nozzle 32 and the discharge-side inner surface 25c, and the sound absorbing material 29 is disposed in the gap T, the pulsation is diffused and attenuated (rectified) by the mesh body 28. ) The noise generated by the jet nozzle 32 is reduced by the action. Further, the noise is further reduced by the rectifying action of the fine eddy current on the surface of the sound absorbing material 29. In addition, the pulsation absorption and damping action of the sound absorbing material 29 causes the jet noise generated by the jet nozzle 32 and the friction with the mesh body 28. The friction noise generated in the above is also synergistically reduced, and the injection noise generated in the jet nozzle 32 is effectively reduced as compared with the case of the mesh body 28 alone. In addition, the same effects as those of the pressure reducing valve 18 of the fine bubble generating device A can be obtained.

  The fine bubble generation device A and the jet bath device B can be installed in the bathtub 1 and selectively used.

  Although the said embodiment was the pressure-reduction valve 18 of the fine bubble generator A and the jet nozzle 32 of the jet bath apparatus B, of course, the liquid nozzle of this invention is not restricted to these.

It is a pressure-reduction valve of the microbubble generator which concerns on embodiment of this invention, (a) is side surface sectional drawing, (b) is CC sectional view taken on the line of (a), (c) is DD of (a). It is D line sectional drawing. It is the principal part of a pressure-reduction valve, (a) is a disassembled perspective view, (b) is side sectional drawing. It is a principal part of the jet nozzle of the jet bath apparatus which concerns on embodiment of this invention, (a) is a disassembled perspective view, (b) is side sectional drawing. (A) is a system diagram of the microbubble generator of a bathtub, (b) is a system diagram of the jet bath apparatus of a bathtub.

Explanation of symbols

18 Pressure reducing valve (liquid nozzle)
25 Nozzle cover 25a Inner surface (discharge side inner surface)
28 Mesh body 29 Sound absorbing material 32 Jet nozzle (liquid nozzle)
A Fine bubble generator B Jet bath device T Clearance

Claims (2)

  A liquid nozzle characterized in that a mesh body that surrounds the periphery of the discharge side is provided on the discharge side inner surface of the discharge hole of the liquid nozzle, and a sound absorbing material is disposed in the gap.   The liquid nozzle according to claim 1, wherein the liquid nozzle is a pressure reducing valve of a fine bubble generating device or a jet nozzle of a jet bath device.

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