JP2830056B2 - Air intake section silencing structure of bubble generating bathtub - Google Patents

Description

The present invention relates to a silencing structure for an air intake section of a bubble generating bathtub.

(B) Conventional technology Conventionally, as described in Japanese Patent Application Laid-Open No. Sho 59-135058, a bubble-generating bathtub sucks bathwater between a bathtub main body and a circulation pump installed outside the main body. A hot water circulation channel consisting of a pipe and a hot water supply pipe is provided, an air intake is provided in the middle of the hot water supply pipe, and the hot water is supplied through the hot water circulation channel by the operation of a circulation pump. Is jetted from a nozzle into a bathtub main body, and at the same time, air sucked from an air intake section is mixed to perform jetting of hot water mixed with air bubbles.

(C) Problems to be Solved by the Invention As described above, in the bubble generating bath, an air intake section is always required, and the air intake section is opened at a predetermined position so that air can be sucked. Noise occurs during inhalation,
Particularly in a small bathroom, noise is reflected and amplified, and therefore, noise countermeasures at the time of inhaling air have been required.

(D) Means for Solving the Problems According to the present invention, a bath water circulation flow path comprising a bath water suction pipe and a bath water high-pressure pipe is provided between a bathtub body and a circulation pump installed outside the bathtub body. The end of the bath water strong feeding pipe is opened to the inside of the bathtub body as a plurality of jet nozzles, and the air intake part is connected to the same bath hot water feeding pipe,
In the bubble-generating bathtub configured to be able to blow the bubble-mixed bath water into the bathtub body from the above-mentioned blowing nozzle, the air volume on the lower flow side is larger than that on the upper flow side in the air flow passage in the air intake section. It is an object of the present invention to provide a silencing structure for an air intake portion of a bubble generating bath formed by forming an air expansion chamber (2).

(E) Function / Effect In the present invention, when taking a bath in the bubble generating bath, the operating panel provided on the edge of the bathtub body is operated to obtain a bubble jet, thereby bathing the bubble bath. In particular, by operating the operation panel unit, air is taken in from the air intake unit, and the bubble-generating bath water jet is operated.

At this time, an air expansion chamber was formed in the air intake passage in the middle of the air flow passage, and a chamber having a larger air volume on the lower side than on the upper flow side was formed. By expanding sound waves in the expansion chamber to dilute the acoustic energy intensity and squeezing at the end of the cavity, an effective sound reduction function is obtained, reducing the noise generated from the air intake hole, and furthermore, depending on the dimensions of the expansion chamber. Sound can be reduced over a specific frequency, it can be selectively silenced, and the pressure loss at the time of air inflow is small.It can be downsized and compact, and it can be installed in the bathtub body without taking special space. It has effects such as being able to. .

(F) Example First, the overall structure of the bubble generating bath according to the present invention will be described.

(A) shown in FIG. 1 is a bubble generation bathtub according to the present invention, and the bubble generation bathtub (A) is provided on the front and rear walls and left and right side walls of a bathtub body (1) formed in a box shape having an upper surface opening. Foot-side, back-side, and ventral-side spout nozzles (2) with automatically variable spout amounts
A total of six (2), (3), (3), (4) and (4) are provided.

The bathtub body (1) has a flange-shaped edge (1a) having a constant width at the periphery, and the air intake section (5) is formed at the edge (1a).
Are formed at substantially central portions of the left and right side walls, and have vertically elongated recesses (1b) and (1b) each having a substantially V-shaped cross section, and the recesses (1b) and (1b) on the side facing the rear wall (back side). The ventral ejection nozzles (4) and (4) are attached to the inclined surface toward the center of the rear wall.

In addition, the ventral ejection nozzle (4) is provided at a higher position than the other foot / dorsal ejection nozzles (2) and (3), so that the bath water can be reliably supplied to the ventral and chest sides and other parts of the human body. So that you can focus on it.

Further, a pump protection case (6) is provided outside the bubble generation bathtub (A). Inside the case (6), a circulation pump (P) for circulating bath water and a pump (P) are provided. Filter (F) for filtering the bath water circulated by P)
And a pump driving motor (M) for driving the pump (P); a motor for opening and closing the motor (M), a nozzle valve opening / closing operation motor, a bubble opening / closing valve opening / closing motor, and an electric three-way valve (45). And a control unit (C) for controlling the driving of ()).

In addition, a bath water circulation channel is interposed between the circulation pump (P) and the bubble generation bath (A).

That is, the bath water circulation flow path includes a bath water suction pipe (7) for sending bath water from the bubble generation bath (A) to the circulation pump (P), and the bath pump (A) from the circulation pump (P). It is composed of a hot water bath pipe (8) for feeding hot water.

The bath water suction pipe (7) is connected to the bathtub body (1).
One end is connected to a suction port (9) opened at the lower part of the pump, and the other end is connected to a water suction port of the circulation pump (P) so as to suck bath water into the circulation pump (P). The feed pipe (8) has one end communicating with the water discharge port of the circulation pump (P),
The other ends of the jet nozzles (2), (3), and (4) are connected to each other.

Further, the above-mentioned suction port (9) is provided at a lower position than the foot side / back side ejection nozzles (2) and (3).

An inverter is interposed between the pump driving motor (M) for driving the circulation pump (P) and the control unit (C), and the output frequency of the inverter is changed to change the frequency of the circulation pump (P). By controlling the number of revolutions, the strength and speed of the jet are changed to create many variations of the jet style, thereby improving the enjoyment of the bubble jet.

Further, a pressure detection sensor for detecting the pressure of the bath water pressure-fed in the pipe (8) is attached in the middle of the bath hot water pipe (8), and the detection result from the sensor is sent to the control unit ( C), and the control unit (C) sends the jet pressure of the bath water jetted from each of the jet nozzles (2), (3), (4) to the rotation speed of the pump drive motor (M) and the jet nozzles ( 2) The control is performed by changing the opening / closing amounts of (3) and (4).

A bath water temperature detection sensor for detecting the temperature of the bath water pressure-fed in the pipe (8) is mounted in the middle part of the bath hot water pipe (8), and the control unit controls the detection result from the sensor. (C), and the control unit (C) controls the pump driving motor (M) and the ejection nozzles (2), (3), (4).

As shown in FIG. 1, between the air intake section (5) and each of the ejection nozzles (2), (3), and (4),
The intake pipe (10) is interposed, and the intake pipe (10)
Form a branch pipe (11) from the midway toward each of the ejection nozzles (2), (3), (4), and connect the tip of each of the branch pipes (11) to each of the ejection nozzles (2), (3), (4). ).

Then, utilizing the negative pressure generated at the time of jetting the bath water from each of the jet nozzles (2), (3) and (4), the air taken in from the air intake section (5) is supplied to each branch pipe ( 1
1) Through the inside, each of the jet nozzles (2), (3), and (4) are sucked into each of the jet nozzles (2), (3), and (4). I have.

Further, as shown in FIG. 1, an operation panel (12) is provided at the corner (1a) of the bathtub body (1) at the corner on the foot side. Tub (A)
Can be operated.

In the above configuration, the gist of the present invention is to provide an air expansion chamber (23) having a larger air volume on the lower flow side than on the higher flow side in the middle of the air flow passage (L) in the air intake part (5).
(24) It is characterized by forming (25).

Therefore, first, the operation panel unit (12) integrally formed with the air intake unit (5) will be described.
2) is formed in a substantially rectangular shape, and the upper surface is the bathtub body (1).
The opening / closing lid (14) is formed on the top surface of the operation panel (12) so as to cover the operation display (12-1). It is provided so that it can be opened and closed freely.

(15) shows the pivot of the opening / closing lid (14). The operation display section (12-1) is made of a flexible thin plate made of a synthetic resin, and a push switch mechanism (16) is provided below the operation display section (12-1). The switch mechanism (16) below the switch mechanism is turned on / off by the pressing of the finger, and a desired driving operation is performed.

At the side end of the operation display section (12-1), a molded section (16 ') is vertically provided.
6 ') is configured to protrude downward, and is also casing by a switch case (17) together with a pressing switch mechanism (16).
8) is derived and connected to the connector (16-1), and the lead (18) from the connector (16-1) is connected to the control unit (C). (16-2) is the lead wire (18)
Show the pipe to protect.

Therefore, the mold part (16 ') is pulled out from the top, cut off from the connector (16-1) part and can be replaced, and is sealed by the seal (34) so that the bath water can be lowered below the connector (16-1). Is designed to prevent water from leaking in.

Further, an outer case (19) is provided outside the switch case (17) so as to surround the case (17), and a peripheral portion of the outer case (19) and a switch case inside thereof are provided. A constant interval (S) is held between the outer case (17) and the outer edge of the outer case (19) is fitted with an upper end edge of an intake case (20) of an air intake section (5) described later. It is configured to be able to.

 Next, the air intake section (5) will be described.

The air intake section (5) is mainly constituted by an intake case (20) formed in a substantially rectangular box shape. That is,
The upper part of the intake case (20) is open upward, the lower part is provided with an air discharge hole, and an air flow passage (L) is formed inside. The upper edge of the intake case (20) is folded outward to form a flange. (21) is formed, the upper part is open, and the air flow passage (L) serving as the interior of the intake case (20) is partitioned into three rooms by a vertical partition (22). 2, 3 air expansion chamber (2
3) (24) and (25).

Moreover, at the top of each air expansion chamber (23) (24) (25)
An upper partition plate (26) and a lower partition plate (27) are provided horizontally at a constant interval, and the partition plates (26) and (27) have an upper sound deadening pipe (28) and a lower The silencing pipe (29) is vertically provided, and the upper and lower parts are communicated via the pipe.

That is, each air expansion chamber is formed by the upper partition (26) and the lower partition (27), and the upper expansion chamber (23 ') (24') (25 ') and the lower expansion chamber (23 ") (24") ( 25 "). Further, the upper sound absorbing pipe (28) communicates the upper part of the intake case (20) with the upper expansion chambers (23 ') (24') (25 '), The lower sound deadening pipe (29) allows the upper expansion chamber (2
3 ') (24') (25 ') and lower expansion chamber (23 ") (24") (2
5 ″), and the silencing pipes (28) and (29) extend downward, with the lower end located in the middle of each expansion chamber.

That is, the air expansion chambers (23), (24), and (25) are formed in the middle of the air flow path (L), and the air expansion chambers are closer to the lower flow side than to the higher flow side of the flow path (L). Are configured so that the air volume is large, and the upper side of the circulation corresponds to the upper and lower silence pipes (28) and (29), and the lower side of the circulation corresponds to the upper and lower expansion chambers (23 '). (23 ″) (24 ′)
(24 ") (25 ') (25").

This corresponds to a so-called inflatable silencer structure among various silencer types. When noise flows from the distribution upper side to the lower side, that is, from the upper and lower silence pipes (28) and (29). When air flows into the upper and lower expansion chambers, sound waves are expanded to dilute the sound energy intensity, and the sound volume (dB) is increased by squeezing at the end of the chamber.

In the present invention, in the schematic diagram as shown in FIG. 6, the maximum volume reduction = D2 / D ₁ × 4 dB, and in the frequency range of 400 Hz to 5 KHz, 1 is 68 mm (natural frequency 1.25 KHz), and the most efficient noise reduction effect. Raised.

That is, the damping characteristic of D2 / D ₁ × 4 (dB) is improved by adopting a structure in which the sound deadening pipe is partially inserted into the air expansion chamber. Is determined by the length (l), so that the length (l) for performing the most efficient attenuation in accordance with the noise frequency characteristics was determined. Furthermore, the sound deadening pipes (28) and (29)
The projection length of l / 2 is best.

In particular, when the air flow passage (L) is of the open type shown in FIG. 7, in the frequency range of 400 Hz to 5 KHz, the noise value (d
B) recorded 71.5dB at the highest point.

In contrast, the one-stage expansion chamber type shown in FIG.
The noise performance (attenuation value) was as effective as 59 dB compared to the open type, but the two-stage expansion chamber type shown in the schematic diagram of the structure of the present invention (Fig. 8) had a noise value of 58 dB and almost no difference. There was no noise value.

However, the two-stage expansion chamber type of the present invention lowers the overall noise value as compared with the one-stage expansion chamber type, and at the same time, has an effective damping effect even for the one-stage expansion chamber type having a low sound volume reduction noise level. Was.

Furthermore, it is also effective in securing the air inflow, and a sufficient intake function can be achieved without lowering the noise attenuation function.

Thus, the structure of the embodiment of the present invention, that is, the upper and lower sound deadening pipes (28) and (29) and the upper and lower expansion chambers (23 ') (2
3 ″) (24 ′) (24 ″) (25 ′) (25 ″)
The noise value (dB) became 58 dB, and it was suppressed to almost the same level as the noise due to air bubbles, achieving a remarkable noise reduction effect.

In addition, the measurement location was set at a position at a constant height (about 1.2 m) away from the bathtub body (1) by about 1 m to the side.

This is the position corresponding to the central part in a bathroom of normal size. In the experiment, the measurement was performed in an anechoic room in order to grasp pure bathroom noise.

As described above, in the present invention, the air intake section (5) is
Compared to the open type shown in the figure, the noise value can be greatly reduced.

That is, the open type (Fig. 6) ... 71.5dB The structure of the present invention (Fig. 8) ... 58dB The noise value of the structure of the present invention is almost the same level as the noise due to air bubbles, Has been reached.

Furthermore, the first air expansion chamber (23) on both sides of the case and the third air expansion chamber (23)
At the lower end of the air expansion chamber (25), first and third air discharge holes (30) and (31) are provided outward, and in the lower middle part of the case, the second air expansion chamber (24) is provided. ) Extend to a position below the first and third air expansion chambers (23) and (25), and the left and right air discharge holes (32) and (3)
3), the vertical positional relationship between the first and third air discharge holes (30) (31) and the left and right air discharge holes (32) (33) is such that the latter is located below the former. ing.

This is so that the intake pipes (10) communicating with the respective air discharge holes are not located on the same plane, but are located vertically so that they do not overlap.

Each of the silencing pipes (28) and (29) is formed to have a small diameter, and a large-volume space is formed between the silencing pipes (28) and (29) so that an intake sound when air is sucked from an intake hole (40) described later. It diffuses and expands into the barrel expansion chambers (23), (24) and (25), expands sound waves, dilutes the sound energy intensity, and reduces sound. The sound can be reduced over a wide frequency range.

Further, the first and third air discharge holes (30) and (31) are connected to the back side and foot side intake pipes (10-1) and (10-2), respectively. 10-2) is connected to the back side and foot side ejection nozzles (3) and (2), respectively, and is configured to inhale and send air by an ejector function of negative pressure formation by the jet of bath water.

The left and right air discharge holes (32) and (33) communicate with ventral intake pipes (10-3) provided on both sides of the bathtub body (1). The abdominal ejection nozzles (4), (4) communicate with each other, and inhale and send air by an ejector function using a bath water jet from the nozzle.

(20 ') indicates a connector case, and (34) indicates a seal between the connector case (20') and the molded portion (16 ').

Also, a collar (21) at the upper edge of the air intake (5).
Is placed on the periphery of a rectangular hole (35) drilled in the edge (1a) of the bathtub body (1), so that the suction case (20) of the air intake part (5) is That is, it is suspended below the edge (1a) of 1).

An edge frame (36) is attached from the upper end surface to the outer end surface of the flange (21).
6), the flange (21) and the edge (1a) of the bathtub body (1) are integrally fixedly connected with bolts (37) and nuts (38). (39) indicates a seal member.

Further, a peripheral portion of the outer case (19) of the operation panel portion (12) is fitted to an outer peripheral surface of the edge frame (36). Thus, the lower end of the operation panel section (12) is configured to be fitted in this manner and to be integrally connected vertically.

Brackets (41) are provided upright on both sides of the flange (21) of the intake case (20), and recesses (42) are provided on both sides of the outer case (19) of the operation panel (12). Formed and bolt (43) from the recess (42) to the bracket (41)
The air intake part (5) and the operation panel part (12) are configured to be integrated by screwing the mounting case (20) and the outer case (19) integrally and continuously. (Four
4) shows a lid of the concave portion (42), which is fitted into the concave portion (42) to perform a decorative cover and a sealing function.

Moreover, a large number of air intake holes () for sucking air are provided on the back of the operation panel (12) outer case (19), that is, on the vertical back of the operation panel (12) having an inclined upper surface. 40) is drilled, and the intake hole (40) is communicated with the air between the outer case (19) of the operation panel section (12) and the switch case (17). 40) through the air flow passage (L) through the space (S), and from the upper end opening of the intake case (20) of the air intake section (5) to the upper sound deadening pipe (28) and the upper expansion chamber (23 '). ) (2
4 ') (25'), lower sound deadening pipe (29), lower expansion chamber (2
3 ") (24") (25 "), and the air sequentially sucked into the suction pipe (10) is jetted from each jet nozzle (2) (3) (4) together with jet bath water. And
The positions of the operation panel section (12) and the air intake section (5) are provided at one corner on the foot side of the bathtub body (1), and the intake hole (40) for the air intake is provided. It opens towards the wall and is therefore arranged at a certain height above the bathtub edge surface. This is to prevent the inflow of bath water as much as possible.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view of a noise structure of an air intake section of a bubble generating bathtub according to the present invention. FIG. 2 is a cross-sectional front view of the air intake section silencing structure of the present invention. FIG. 3 is a sectional side view of the same. FIG. 4 is an explanatory sectional view taken along the line II of FIG. 2; FIG. 5 is a plan view showing an intake case of an air intake section in the air intake section silencing structure of the present invention. FIG. 6 is a schematic view of the present invention. FIG. 7 shows a conventional structure. FIG. 8 is a schematic diagram of the sound deadening structure of the present invention. (1): Bathtub body (5): Air intake section (12): Panel section (23): First air expansion chamber (24): Second air expansion chamber (25): Third air expansion chamber (40): Intake hole

Continuation of the front page (72) Inventor Mitsuaki Hashida 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kiki Co., Ltd. Chigasaki Plant (72) Inventor Koichi Uchiyama 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Toto (72) Inventor Kenji Moriyama 2-8-1, Motomura, Chigasaki-shi, Kanagawa Prefecture Tochiki Equipment Co., Ltd. Chigasaki Factory (56) References JP-A-2-309952 (JP, A) JP-A-1-155585 (JP, A) JP-A-59-151962 (JP, A) JP-A-1-112831 (JP, U) JP-A-2-61284 (JP, U) JP-A 62-21335 (JP) , U) Hikaru Hei 2-82335 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61H 23/00 520

Claims (1)

(57) [Claims] 1. A hot water supply pipe (7) and a hot water supply pipe (8) are provided between a bathtub body (1) and a circulation pump (P) installed outside the bathtub body (1). A plurality of bath water circulation passages are provided, and the ends of the bath water strong feeding pipe (8) are opened into the bathtub body to form ejection nozzles (2), (3) and (4). An air intake section (5) is connected to the feed pipe (8) so as to be able to blow out the hot water mixed with bubbles into the bathtub body (1) from the blowout nozzle. A bubble generation bath formed by forming air expansion chambers (23), (24), and (25) in the middle of the air flow passage (L) in the inlet portion (5), where the air volume on the downstream side is larger than that on the upstream side. Air intake silencing structure.