JP2009072461A - Jet bath system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jet bath system which suppresses a noise generated in stopping mixing air in the jet bath system for jetting a jet flow with air bubbles. <P>SOLUTION: The jet bath system is equipped with a bathtub which is filled with bathtub water and has a suction port for sucking the bathtub water, a pump for sucking the bathtub water from the suction port, pressurizing the bathtub water, and delivering it, a nozzle for jetting the pressurized bathtub water delivered from the pump to the inside of the bathtub by mixing air bubbles in the pressurized bathtub water, an air pipe arrangement for introducing the air in the atmosphere to the nozzle, and a solenoid valve for opening and closing the air pipe arrangement, and closes the solenoid valve when the driving of the pump is started from the halt. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a jet bath system having a configuration for jetting a bubble-containing jet into a bathtub.

2. Description of the Related Art Conventionally, there is a type in which a nozzle is provided on a bathtub wall and a mechanism for taking air into the nozzle wall is provided, and a bubble-containing jet is ejected from the nozzle into the bathtub (for example, Patent Documents 1 and 2).
Japanese Patent No. 2730303 JP-A-6-7405

  In Patent Document 1, switching of the presence or absence of air in the nozzle is performed by a manual on-off valve. In such a configuration, if the pump is driven with the open / close valve set to “open”, the start of driving the pump and the start of air mixing occur at the same time. There is a problem that it occurs.

Patent Document 2 discloses a configuration in which an electromagnetic valve is provided in the middle of air piping, but even in this case, if the pump is driven with the electromagnetic valve opened while the pump is being driven, the pump is driven. Since the start and the start of air mixing occur at the same time, there is a problem that a large noise is generated due to a combination of sounds associated with both operations.

  This invention is made in view of the above-mentioned problem, and provides the jet bath system which can suppress the air mixing noise at the time of the drive start of a pump in the jet bath system which can eject a bubble-containing jet.

  Moreover, according to the other one aspect | mode of this invention, while being able to store bathtub water, the bathtub which has a suction inlet for sucking in the said bathtub water, and sucking in, pressurizing and discharging bathtub water from the said suction inlet A pump, a nozzle capable of injecting bubbles into pressurized bathtub water discharged from the pump into the bathtub, an air pipe for guiding air in the atmosphere to the nozzle, and opening and closing the air pipe A jet bath system is provided, wherein the electromagnetic valve is closed when driving is started from a state where the pump is stopped.

  ADVANTAGE OF THE INVENTION According to this invention, the jet bath system which can suppress the air mixing noise at the time of the drive start of a pump is provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing a configuration of a jet bath system according to an embodiment of the present invention.
FIG. 2 is a schematic view of the jet bath system as seen from the plane direction.
FIG. 3 is a schematic view of the jet bath system as viewed from the side.

  The jet bath system according to the present embodiment is mainly jetted from the bathtub 1, jet jetting means for sucking the bathtub water in the bathtub 1 and ejecting the bathtub water into the bathtub water again from the nozzles 12, 16, and the nozzles 12, 16. And an air supply means for allowing bubbles to be mixed into the jet.

  The bathtub 1 can store bathtub water (including hot water) and has a suction port 5 for sucking the stored bathtub water. The suction port 5 is formed in the long side bathtub wall in the bathtub 1, and the suction port 5 is connected to the suction port of the pump 7 via the suction pipe 6. When the pump 7 is driven, the bathtub water stored in the bathtub 1 is sucked into the suction pipe 6 from the suction port 5.

  When considering a normal bathtub having a pair of opposed long-side bathtub walls and a pair of opposed short-side bathtub walls, a bather generally sits back on one of the pair of short-side bathtub walls. In order to bathe in a posture in which the foot is directed to the other short side bathtub wall, when the suction port 5 is formed on the short side bathtub wall, the suction port 5 is blocked by the bather's back and soles. There is a concern that an excessive load is applied to the pump 7. Therefore, it is desirable to form the suction port 5 in the long side bathtub wall which is not easily blocked by a part of the body of the bather.

  A discharge pipe 8 is connected to the discharge port of the pump 7, and two pipe systems 11 and 15 are connected to the discharge pipe 8 via a three-way valve 9 as a switching valve in the present embodiment. One piping system 11 is branched into, for example, two pipes on the downstream side, and a first nozzle 12 is connected to each of the branched pipes. The other piping system 15 is also branched into, for example, two pipes on the downstream side thereof, and the second nozzle 16 is connected to each of the branched pipes.

  The pump 7 can pressurize the bath water sucked from the suction port 5 and supply it to the piping systems 11 and 15, and the pressurized bath water guided through the piping system 11 is ejected from the first nozzle 12 into the bath water. Then, the pressurized bathtub water guided through the piping system 15 is ejected from the second nozzle 16 into the bathtub water.

  In the present embodiment, for example, the two first nozzles 12 are attached to one short side bath wall 2a, and the other short side bath wall 2b facing the short side bath wall 2a has, for example, two second nozzles. Two nozzles 16 are attached.

Next, an air supply means is demonstrated with reference to FIG.1 and FIG.2.
The air supply means opens and closes the air pipes 32, 33, 35 for guiding air in the atmosphere to the first nozzle 12 and the second nozzle 16, and the air flow path of the air pipe 32 provided in the air pipe 32. And a solenoid valve 31.

  In the bathtub rim 3 provided around the upper edge of the inner tub of the bathtub 1, the long-side bathtub wall in which the suction port 5 is formed and the short-side bathtub wall 2 a in which the first nozzle 12 is provided. Air intake ports 41 are formed in the vicinity of the corners. The upstream end of the air pipe 32 is connected to the air intake port 41 and communicates with the atmosphere.

  A downstream side of the solenoid valve 31 in the air pipe 32 branches into two air pipes 33 and 35, the air pipe 33 is connected to the first nozzle 12, and the air pipe 35 is connected to the second nozzle 16. ing. The air pipes 33 and 35 are provided with check valves 34 and 36 for preventing intrusion of hot water from the first nozzle 12 and the second nozzle 16 side to the upstream side of the air pipe, respectively.

  The pump 7, the three-way valve 9, and the electromagnetic valve 31 are controlled based on a signal from the control unit 21 in response to an operation of the operation unit 22 by the user.

  The first nozzle 12 and the second nozzle 16 are different in structure and perform jet ejection in different modes.

  First, the first nozzle 12 will be described with reference to FIG. 4. The first nozzle 12 is provided with a flowing water inlet 51 communicating with the piping system 11 at one end (upstream end) and the other end (downstream end). ) Has a substantially cylindrical tube body 50 provided with a spout 58.

  The cylindrical body 50 is held by one of the short side bathtub walls 2a with the ejection port 58 facing the inside of the bathtub 1. Inside the cylinder 50 between the flowing water introduction port 51 and the jet port 58, a flowing water introduction unit 52, a flow path cross-sectional contraction unit 53, and a chamber 55 are provided in this order from the upstream side (the flowing water introduction port 51 side). The flowing water inlet 51 and the jet outlet 58 communicate with each other through these.

  The flowing water introduction part 52 is provided between the flowing water introduction port 51 and the flow path cross-section contraction part 53, and the flow path cross section is gradually narrowed from the flowing water introduction port 51 toward the flow path cross-section contraction part 53. . The channel cross-section contracting portion 53 is located at the axial center of the cylinder 50, and the channel cross-section is reduced with respect to the running water inlet 51 and the running water introduction portion 52.

  On the downstream side of the flow path cross-section contraction portion 53, a chamber 55 having a flow path cross-section rapid enlargement portion 54 whose one end portion (upstream end portion) has a flow path cross-section enlarged rapidly with respect to the flow path cross-section contraction portion 53. Is provided. The upstream side end portion of the chamber 55 functions as the flow path cross-sectional sudden expansion portion 54, and the downstream side end portion of the chamber 55 functions as the ejection port 58.

  Wall surfaces 53a and 54a surrounding the space in the cylindrical body 50 from the flow path cross-section contraction portion 53 to the flow path cross-section rapid enlargement portion 54 change substantially vertically. That is, the wall surface 53a around the flow path cross-section contracting portion 53 is substantially parallel to the axial direction of the cylindrical body 50, whereas the upstream end portion of the chamber 55 functioning as the flow path cross-section suddenly expanding portion 54 is used. The wall surface 54a is formed so as to extend outward in a radial direction following the wall surface 53a. Due to this sudden change in the channel wall surface, separation of the flow from the wall surface occurs at the channel cross-section sudden expansion portion 54 as described later.

  The inner wall surface of the chamber 55 extends substantially parallel to the axial center C of the cylindrical body 50 from the channel cross-section suddenly enlarged portion 54 to the vicinity of the ejection port 58. An inner wall surface that continues to the spout 58 on the downstream side of the chamber 55 is an annular inclined surface 57 that is inclined toward the axial center C of the cylindrical body 50.

  In the chamber 55 in the vicinity of the ejection port 58, a shield 56 is provided that blocks a part of the flow path in the chamber 55 that leads to the ejection port 58. The shield 56 is formed in a disk shape, for example, and is provided inside the chamber 55 with its center coinciding with the axial center C of the cylinder 50. The shield 56 does not shield all the flow paths in the chamber 55, and allows the flow of flowing water from the chamber 55 to the jet outlet 58 between the outer peripheral surface of the shield 56 and the inner wall surface of the chamber 55. A flow path is secured.

  The shield 56 is held with respect to the cylinder 50 through a plurality of support members (not shown) provided radially between the shield 56 and the inner wall surface of the chamber 55. Since the shield 56 receives the pressure (dynamic pressure) of pressurized bathtub water introduced from the flowing water inlet 51 and flowing through the chamber 55 to the jet outlet 58, the shield 56 can withstand the pressure when there is only one support member. There is a possibility that sufficient strength cannot be obtained and the shield 56 may come off, and if there are only two support members, the pressure acting on the surface of the shield 56 becomes non-axisymmetric distribution with respect to the axial center C. There is a possibility that the shield 56 rotates due to the influence of the moment around the support member caused by this. Therefore, it is desirable to provide three or more support members for holding the shield 56.

A swirling jet is ejected from the first nozzle 12 configured as described above.
FIGS. 5A to 5D are schematic views for explaining an action in which a swirling jet is formed by the first nozzle 12.

  The pressurized bathtub water introduced from the flowing water introduction port 51 flows into the chamber 55 as a jet through the flowing water introduction part 52, the flow path cross-sectional contraction part 53, and the flow path cross-section sudden expansion part 54 in order. When the pressurized bathtub water flows into the chamber 55 from the flow path cross-section contracting portion 53, it becomes impossible to flow along the inner wall surface due to a sudden expansion of the flow path cross section, that is, the flow of the water to the inner wall surface of the flow path is reduced. Peeling occurs.

  In general, the jet accelerates the external fluid by exchanging momentum with the external fluid, and is entrained inside the jet. At this time, if a wall surface exists in the vicinity of the jet, the jet itself is bent toward the wall surface by the reaction of the attractive force that acts to draw the external fluid into the interior, and the flow again follows the wall surface. That is, the flow is reattached to a part of the circumference of the inner wall surface of the chamber 55.

  The main stream adhering to the inner wall surface of the chamber 55 flows along the inner wall surface of the chamber 55 as it is, flows between the outer peripheral surface of the shield 56 and the inner wall surface of the chamber 55 toward the jet port 58, and before the jet port 58 (upstream). The jet is ejected from the ejection port 58 into the bathtub 1 as a jet that is inclined with respect to the axial center C along the inclined surface 57 formed to be inclined toward the axial center C. In this way, a main stream represented by the thick arrow a in FIG. 5A is formed inside the first nozzle 12.

  The flow passage cross section of the jet outlet 58 is larger than the flow passage cross-section contracting portion 53, and the flow is decelerated downstream, that is, a reverse pressure gradient is formed in the chamber 55 in which the static pressure increases downstream. Furthermore, since the shielding body 56 is provided in the chamber 55 so as to block a part of the flow path, a part of the main flow described above is not ejected from the ejection port 58, and the arrow b in FIG. As shown by the above, it is returned to the upstream side of the chamber 55.

  As shown in FIG. 5D, the flow returned to the upstream side flows into the stagnation region where the main flow is separated in the vicinity of the channel cross-section sudden expansion portion 54, as shown in FIG. 5C. Then, a swirling flow is formed around the central axis C in the vicinity of the channel cross-section suddenly enlarged portion 54, whereby the reattachment position of the main flow with respect to the inner wall surface changes irregularly in the circumferential direction. A jet swirling around is ejected.

  The state in which the swirling jet is jetted from the first nozzle 12 in the state where the jet flow is visualized by mixing bubbles in the jet flow is shown in the photographic diagrams of FIGS.

  A bather who turns his back to the side of the short side bathtub wall 2a provided with the first nozzle 12 applies a swirling jet ejected from the first nozzle 12 to a part of the body such as the waist, back and shoulders. A massage effect can be acquired by receiving. The jet ejected from the first nozzle 12 is a thick and soft swirling jet unlike the generally well-known bubble bath apparatus, so it wraps around the waist and pushes the entire back and waist. You can get a massage that feels like a hand massage that does not cause strong local irritation, such as miho-miso, so you can relax and relax even after a long bath. In addition, since the swirl frequency of the jet is not constant but varies irregularly, a natural massage feeling can be obtained.

  Further, as shown in FIG. 4, the cylindrical body 50 of the first nozzle 12 is formed with an air suction port 59 leading to the inside of the chamber 55, and this air suction port 59 is the above-mentioned air suction port shown in FIG. It is connected to the pipe 33. By opening the solenoid valve 31, the air is introduced into the first nozzle 12 through the air intake port 41 (see FIG. 2), the air pipes 32 and 33, and the air intake port 59 provided in the bathtub rim 3. Inside air can be mixed and a bubble-containing jet can be ejected. The pressure in the chamber 55 is lower than that in the vicinity of the ejection port 58 and becomes negative, and air can be supplied from the air suction port 59 into the chamber 55 by the ejector effect. If the electromagnetic valve 31 is closed, the supply of air into the first nozzle 12 is cut off, and a jet without bubbles is ejected from the first nozzle 12.

  Since the air pipe 33 connected to the first nozzle 12 is provided with a check valve 34, it is possible to prevent intrusion of hot water into the air pipe upstream of the check valve 34, and dirt such as dirt Is difficult to adhere and accumulate in the air piping.

  Next, the second nozzle 16 will be described with reference to FIG.

  The second nozzle 16 includes a fixed portion 64 in which a flow path 64a communicating with the piping system 15 is formed, and an ejection hole 62 in which one end side communicates with the flow path 64a and the other end faces the inside of the bathtub 1. And a movable portion 61 formed on the surface.

  The fixing portion 64 is held by the other short side bathtub wall 2b facing the short side bathtub wall 2a provided with the first nozzle 12. The movable portion 61 is held in the vicinity of the outlet of the flow path 64a of the fixed portion 64 so as to be rotatable or swingable via an O-ring 63 so that the jet ejection direction can be adjusted.

  The fixed portion 64 is provided with an air suction path 65 communicating with the flow path 64a, and the air suction path 65 is connected to the air pipe 35 described above shown in FIG. By opening the electromagnetic valve 31, the atmosphere is introduced into the second nozzle 16 via the air intake port 41 (see FIG. 2) provided in the bathtub rim 3, the air pipes 32 and 35, and the air suction path 65. Inside air can be mixed and a bubble-containing jet can be ejected. The pressure in the flow path 64a is lower than that in the vicinity of the jet outlet, and the pressure is negative, and air can be supplied from the air suction path 65 into the flow path 64a by the ejector effect. If the electromagnetic valve 31 is closed, the supply of air into the second nozzle 16 is interrupted, and a jet without bubbles is ejected from the second nozzle 16.

  Since the air pipe 35 connected to the second nozzle 16 is provided with a check valve 36, it is possible to prevent hot water from entering the air pipe upstream of the check valve 36, and dirt such as dirt. Is difficult to adhere and accumulate in the air piping.

  The second nozzle 16 can execute a “relaxation mode” jet ejection when bubbles are not mixed, and can execute a “power blow mode” jet ejection when bubbles are mixed. is there.

  For a bather who faces the front side of the body to the short side bathtub wall 2b to which the second nozzle 16 is attached and leans back against the short side bathtub wall 2a on the opposite side, the second nozzle 16 and the body In the “relaxation mode” operation with no air bubbles and a relatively small flow rate, the jet stream ejected straight from the second nozzle 16 becomes turbulent from the middle, and the bather Around the chest, or around the abdomen or back, or by jetting a jet downward and colliding with the bottom of the bathtub to form a turbulent flow that causes the bather to wrap around from behind the buttocks. A gentle flow is formed. Thereby, the bather can experience the feeling of being gently wrapped in the flow of water and can relax the mind.

  In the “power blow mode”, a powerful jet stream containing air bubbles and having a flow rate higher than that in the “relaxation mode” is sprayed to locally stimulate the bather's lower limbs, for example.

  As described above, according to the jet bath system according to the present embodiment, there are three different types: “Momiyu mode” by the first nozzle 12, “Relax mode” and “Power blow mode” by the second nozzle 16. A jet ejection mode can be performed.

  When the main switch 23 of the operation unit 22 shown in FIG. 1 is pressed, for example, “Momiyu mode” is started. However, the mode to be started when the main switch 23 is pressed can be changed to “relaxation mode” or “power blow mode” in the user settings.

  The “Momi hot water mode” is started from “no air-strong” operation with a discharge amount of 80 (liters / minute) and no air mixing, and every time the momi water switch 24 of the operation unit 22 is pressed, 60 (liters) is started. / Min) with no air mixing “no air – weak”, 80 (liter / min) with air mixing “air present – strong”, 60 (liter / min) with air discharge It is switched in order, such as “with air—weak” with mixing, “without air—strong”, and so on again.

  The “relaxation mode” in which bubbles are not mixed is started from “wave” operation in which the discharge amount changes in the range of 25 to 50 (liters / minute). Each time the relaxation switch 26 of the operation unit 22 is pressed, the “relaxation mode” is constant. “Continuous” for discharging at a discharge amount of 50 (liters / minute), “wave”, and so on are sequentially switched.

  The “power blow mode” in which bubbles are mixed starts with a “strong” operation with a discharge amount of 80 (liters / minute), and each time the power blow switch 25 of the operation unit 22 is pressed, the discharge amount is 60 (liters). / Min) “weak”, “strong” again, and so on.

  In particular, for users in environments where noise is annoying to the surroundings, such as in apartment buildings, and for users who do not like noise when mixed with air, the above-mentioned operation for mixing air can be performed according to user settings. It can be set to force no air.

  When the pump 7 is driven to execute the “Momiyu mode”, the three-way valve 9 communicates the discharge pipe 8 connected to the discharge port of the pump 7 and the pipe system 11 connected to the first nozzle 12. Then, the piping system 15 connected to the second nozzle 16 and the discharge piping 8 are switched to the “first position”.

  When the pump 7 is executed to execute the “relaxation mode” or the “power blow mode”, the three-way valve 9 causes the discharge pipe 8 and the pipe system 15 connected to the second nozzle 16 to communicate with each other, and Is switched to the “second position” where the piping system 11 and the discharge piping 8 connected to the nozzle 12 are disconnected.

  That is, when the pump 7 is driven, the two piping systems 11 and 15 do not communicate with the discharge side of the pump 7 at the same time, but only one system communicates with the discharge side of the pump 7, and the first nozzle A jet is ejected from only one of the nozzle 12 and the second nozzle 16.

  Therefore, one pump 7 is sufficient, and when one pump 7 is shared by two systems, it is not necessary to supply pressurized bath water to both systems at the same time. As a result, the pump 7 can be reduced in size, and cost and pump driving noise can be reduced.

  Further, when jets are ejected simultaneously from both the first nozzle 12 and the second nozzle 16, the jets from the nozzles 12 and 16 or the flow in the bathtub formed by the jets interfere with each other. The effects specific to each mode described above cannot be obtained, or the effects are reduced. However, in the present embodiment, when the jet is ejected from the first nozzle 12, the jet from the second nozzle 16 is not performed, and when the jet is ejected from the second nozzle 16, the first is performed. Since the jet flow from the nozzle 12 is not performed, each mode described above is executed independently, and an effect peculiar to each mode is reliably obtained.

  When the pump 7 is driven, the three-way valve 9 takes the “first position” or the “second position” described above, and the piping system 11 and the piping system 15 do not communicate with each other. However, when the driving of the pump 7 is stopped and the jet is not ejected, the three-way valve 9 is switched to the “third position” that allows the piping system 11 and the piping system 15 to communicate with each other. In this “third position”, the discharge pipe 8 connected to the discharge port of the pump 7 may be in communication with or cut off from the piping system 11 and the piping system 15.

  When one end of the pipe is closed, particularly when the pipe diameter of the pipe is small, it is difficult for water remaining in the pipe to escape. However, in this embodiment, when the pump 7 is stopped, the three-way valve 9 takes the “third position”, so that the piping system 11 and the piping system 15 communicate with each other via the three-way valve 9. When the piping systems 11 and 15 are collectively regarded as one piping, both ends of the piping are in the bathtub 1 where the bath water is empty without being stored through the outlets 58 and 62 of the nozzles 12 and 16. In other words, both ends of the pipe are open to the atmosphere. Thereby, when not in use, water remaining in the piping systems 11 and 15 can be discharged out of the piping through the nozzles 58 and 62 of the nozzles 12 and 16, which is hygienic.

  In order to make it easy to drain residual water in the piping systems 11 and 15, in this embodiment, as shown in FIG. 3, the three-way valve 9 is provided at a position higher than the nozzles 12 and 16, A height difference is generated between the nozzles 12 and 16 and the jet outlets 58 and 62.

  Similarly, the pump 7 and the three-way valve 9 are provided at a position higher than the suction port 5 in order to easily remove residual water in the suction pipe 6 and the pump 7 through the suction port 5.

  The first nozzle 12 having the channel cross-section contracting portion 53 and the shield 56 in the middle of the channel is more likely to cause pressure loss than the second nozzle 16. Therefore, in the present embodiment, the pump 7 is provided in the vicinity of the short-side bathtub wall 2 a to which the first nozzle 12 is attached, and the first nozzle 12 having a larger pressure loss is more than the second nozzle 16. Also, the piping path to the pump 7 is shortened. In addition, the pump 7 is provided on the waterproof pan, for example, below the bathtub rim 3 on the short side bathtub wall 2a side via a vibration isolating member, a gantry or the like (not shown).

  Next, the operation timing of the pump 7, the three-way valve 9, and the air solenoid valve 31 at the time of starting each mode, switching between the modes, and switching the presence / absence of air mixing will be described.

  When the air is mixed from the state without air mixing during the “Momiyu mode”, the rotational speed of the pump 7 is set lower than the rotational speed in the driving state without air mixing at that time. The electromagnetic valve 31 is switched from “closed” to “open” after the target rotational speed is reached.

  By reducing the rotational speed of the pump 7, the negative pressure in the first nozzle 12 due to the ejector effect is reduced (the pressure difference between the atmosphere and the first nozzle 12 is reduced), which occurs when air suction is disclosed. Sound can be reduced.

  Further, the negative pressure in the air pipe 32 acts as a resistance when the valve body of the electromagnetic valve 31 moves from the “closed” position to the “open” position. If the negative pressure is reduced, the power for opening the electromagnetic valve 31 can be reduced, and power consumption can be suppressed.

  It is not limited to switching the solenoid valve 31 from “closed” to “open” after the rotational speed of the pump 7 is reduced first, but the reduction of the rotational speed of the pump 7 and “open” to “open” of the solenoid valve 31 are not limited. May be simultaneously performed. In any case, when the solenoid valve 31 is switched to “open” and a predetermined time elapses, the rotational speed of the pump 7 is set to a desired rotational speed set according to the operation mode at that time.

  When the relaxation switch 26 is pressed during the “Momiyu mode”, the drive of the pump 7 is stopped first. After the pump 7 is stopped, the solenoid valve 31 is closed if it is open, and the three-way valve 9 is turned “ The position is switched from “position” to “second position”, and the pump 7 is again driven to shift to “relaxation mode”.

  When the power blow switch 25 is pressed during the “Momiyu mode”, the drive of the pump 7 is stopped first. After the pump 7 is stopped, the solenoid valve 31 is closed if it is open, and the three-way valve 9 is set to “first” The position is switched from “position” to “second position”, and the pump 7 is again driven to shift to the “power blow mode”.

  As described above, since the pump 7 is stopped when the three-way valve 9 is switched from the “first position” to the “second position”, the piping system 11 and the piping system 15 are in an instantaneous communication state. Therefore, it is possible to reliably prevent the jets from being ejected simultaneously from both the first nozzle 12 and the second nozzle 16. In addition, since the discharge pressure from the pump 7 does not act on the three-way valve 9, it is not necessary to use a large torque to switch the three-way valve 9, and power consumption can be suppressed.

  When the Momi hot water switch 24 is pressed during the “relaxation mode”, the driving of the pump 7 is stopped first, and after the pump 7 is stopped, the three-way valve 9 is moved from the “second position” to the “first position”. Then, the pump 7 is again driven to shift to the “Momiyu mode”.

  Thus, when the three-way valve 9 is switched from the “second position” to the “first position”, the piping system 11 and the piping system 15 are in an instantaneous communication state because the pump 7 is stopped. Therefore, it is possible to reliably prevent the jets from being ejected simultaneously from both the first nozzle 12 and the second nozzle 16. In addition, since the discharge pressure from the pump 7 does not act on the three-way valve 9, it is not necessary to use a large torque to switch the three-way valve 9, and power consumption can be suppressed.

  When the power blow switch 25 is pressed during the “relaxation mode” without air mixing, the rotational speed of the pump 7 is lowered below the rotational speed in the driving state at that time, and becomes below a preset target rotational speed. After that, the solenoid valve 31 is switched from “closed” to “open”, and then the pump 7 is driven at the rotational speed of “power blow mode” to shift to “power blow mode”. Note that the “relaxation mode” and the “power blow mode” are jet ejections using the same second nozzle 16, and therefore the three-way valve 9 is not switched during the transition between these two modes.

  Even in this case, when the solenoid valve 31 is switched from “closed” to “open”, the negative pressure in the second nozzle 16 due to the ejector effect is reduced by reducing the rotational speed of the pump 7 (atmosphere and first). The pressure difference between the two nozzles 16 is reduced), the sound generated when air suction is disclosed can be reduced, and the power for opening the electromagnetic valve 31 can be reduced, and the power consumption can be suppressed.

  When the Momi hot water switch 24 is pressed during the “power blow mode”, the drive of the pump 7 is stopped first. After the pump 7 is stopped, the solenoid valve 31 is closed and the three-way valve 9 is moved from the “second position”. The mode is switched to the “first position”, and the pump 7 is driven again to shift to the “Momiyu mode”.

  When the relaxation switch 26 is pressed during the “power blow mode”, the rotational speed of the pump 7 is reduced below the rotational speed in the driving state at that time, and the electromagnetic valve becomes lower than a preset target rotational speed. 31 is switched from “open” to “closed”, and then the pump 7 is driven at the rotational speed of “relaxation mode” to shift to “relaxation mode”.

  Even when the electromagnetic valve 31 is switched from “open” to “closed”, the negative pressure in the air pipe 32 due to the ejector effect can be reduced by reducing the rotational speed of the pump 7. The negative pressure in the air pipe 32 acts as an urging force when the valve body of the solenoid valve 31 moves from the “open” position to the “closed” position, and the negative pressure in the air pipe 32 is reduced due to a decrease in the rotational speed of the pump 7. If the pressure is reduced, it is possible to reduce noise generated by closing the solenoid valve 31 vigorously.

  When the drive start of the pump 7 and the start of air mixing occur at the same time, the sounds associated with both operations are likely to generate a loud noise, so when starting the drive from a state where the pump 7 is stopped, such as in the initial operation or mode switching, It is desirable that the solenoid valve 31 be “closed” so that each mode is started from a state in which no air is mixed.

  Next, with reference to FIG. 8, the suction inlet 5 of bathtub water is demonstrated concretely.

  An opening 4a is formed in the long side bathtub wall 4, and a cylindrical member 82 is fitted into the opening 4a via a packing. In the cylindrical member 82, the end portion on the inner side of the long side bathtub wall 4 is formed in a net shape in which a plurality of water passage holes 5 a are formed, and the end portion located outside the long side bathtub wall 4 is an elbow member 85. It is connected to the suction pipe 6 via.

  Further, a cover 83 is detachably provided at an end portion of the tubular member 82 where the water passage hole 5a is formed, and the cover 83 is also formed with a plurality of water passage holes 5b. The water passage hole 5b is formed not only in the main surface portion 83a of the cover 83 but also in the side surface portion 83b substantially perpendicular to the main surface portion 83a.

  The water passage holes 5a and 5b function as the suction port 5 for sucking in the bathtub water, and the bathtub water sucked from the water passage holes 5a and 5b passes through the inside of the tubular member 82 and the inside of the elbow member 85. , Led to the suction pipe 6.

  The diameter of the water passage hole 5b formed in the cover 83 is smaller than the diameter of the water passage hole 5a formed in the cylindrical member 82. If the hole diameter is small, the effect of preventing the intrusion of foreign matter is high, but the cover 83 is easily clogged. However, since the cover 83 can be easily attached and detached by the user, cleaning and maintenance can be easily performed. Further, by forming the water passage hole 5 a in the cylindrical member 82, even when the cover 83 is removed, foreign matter can be prevented from entering the suction pipe 6 and the pump 7. However, since the tubular member 82 is fixed to the bathtub wall 4, the diameter of the water passage hole 5 a formed in the tubular member 82 is larger than the water passage hole 5 b of the cover 83 in consideration of the cleaning property. .

  The elbow member 85 is provided with an air suction hole 81 communicating with the inside of the elbow member 85. The air suction hole 81 includes an air pipe for mixing air into the nozzles 12 and 16 via the air pipe 37 shown in FIG. It communicates with a common air intake port 41 (see FIGS. 2 and 3).

  When the water passage hole 5b or 5a is blocked by a part of the body of the bather or the hair, and the negative pressure inside the tubular member 82 and the elbow member 85 increases, the air suction hole 81 is inserted into the inside due to the ejector effect. Air is taken in, and the capacity of the pump 7 is reduced or stopped by sucking the air. Thereby, useless driving of the pump 7 in a situation where the bath water is not sucked can be avoided, and the suction force in the water passage holes 5b and 5a is weakened. Can be easily separated.

  As shown in FIG. 9, the downstream side of the air intake port 41 is divided into two systems: an air supply port 75 to the nozzles 12 and 16 and an air supply port 76 to the suction port 5. The air intake member 74 in which the air supply ports 75 and 76 are formed is fitted into an opening formed in the bathtub rim 3 via a packing.

  The air supply port 75 is connected to the air pipes 32, 33, and 35 via the electromagnetic valve 31 described above shown in FIG. The air supply port 76 is connected to the air suction hole 81 shown in FIG. 8 through the air pipe 37 shown in FIG.

  As described above, since the air pipes 33 and 35 are provided with the check valves 34 and 36, the bathtub water is supplied upstream of the check valves 34 and 36, the air supply port 75, and the upper part thereof. There is no entry into the cavity 75.

  However, a check valve is not provided in the air pipe 37 connected to the suction port 5. This is because the air suction system for the suction port 5 is used only in an emergency as described above, and since it is not frequently used, it is not necessary to provide a check valve at a high cost. is there.

  Therefore, with respect to the air suction system for the suction port 5, as shown in FIG. 9, the upper end opening of the air supply port 76 is positioned higher than the upper surface of the bathtub rim 3. Thereby, even if bathtub water is stored up to the upper surface of the bathtub rim 3, the upper end opening of the air supply port 76 is not immersed in the bathtub water, and air intake is not hindered.

  In addition, the wind noise at the time of air taking in can be reduced by providing the cavity part 72 with the larger internal dimension of the horizontal direction in the upper part (upstream side) of the air supply port 75 for nozzles.

  In addition, from the viewpoint of appearance and prevention of foreign matter intrusion, a cap 71 that covers the cavity 72 and the upper end opening of the air supply port 76 is detachably provided, and an air suction port provided on the side of the cap 71 Air in the atmosphere can be introduced into the air supply ports 75 and 76 via 73.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to them, and various modifications can be made based on the technical idea of the present invention.

  In the embodiment described above, one three-way valve 9 is used as a switching valve for opening and closing between the discharge side of the pump 7, the piping system 11, and the piping system 15. However, as shown in FIG. Switching valves 91, 92, and 93 may be provided in the system 11 and the piping system 15, respectively.

  Even in this configuration, when the pump 7 is driven (the switching valve 91 is “open”), both the switching valve 92 and the switching valve 93 are not simultaneously “open”, and only one of them is “open”. The other is “closed”, so that the piping system 11 and the piping system 15 do not communicate with each other. However, when the driving of the pump 7 is stopped and the jet is not ejected, both the switching valve 92 and the switching valve 93 are “open”, and the piping system 11 and the piping system 15 are communicated with each other. Accordingly, when the piping systems 11 and 15 are collectively regarded as one piping when the pump 7 is stopped, the bath water is stored at both ends of the piping via the outlets 58 and 62 of the nozzles 12 and 16. Instead, it communicates with the tub 1 which has been emptied, that is, both ends of the pipe are opened to the atmosphere. As a result, when not in use, water remaining in the piping systems 11 and 15 can be discharged out of the piping through the nozzles 58 and 62 of the nozzles 12 and 16, which is sanitary.

  In the above-described embodiment, a specific example in which two nozzles are connected to each of the piping systems 11 and 15 has been shown. However, one or three or more nozzles are connected to each of the piping systems 11 and 15. But you can.

  Further, for example, a third nozzle that forms a water flow along the long side bathtub wall is attached, and the third nozzle is connected to the discharge side of the pump 7 via a piping system different from the piping systems 11 and 15. You may let them. Even in this case, when the pump 7 is driven, only one of the three piping systems communicates with the discharge side of the pump 7, and when the pump 7 stops, all the piping systems communicate with each other. The end of each piping system is opened to the atmosphere through a nozzle connected to the piping system. Of course, four or more piping systems may be provided.

Schematic which shows the structure of the jet bath system which concerns on embodiment of this invention. The schematic diagram which looked at the jet bath system from the plane direction. The schematic diagram which looked at the jet bath system from the side. The schematic cross section of the 1st nozzle in the same jet bath system. The schematic diagram for demonstrating a mode that a turning jet is formed with the said 1st nozzle. The photograph figure showing a mode that the turning jet was ejected from the 1st nozzle. The schematic cross section of the 2nd nozzle in the same jet bath system. The schematic cross section near the suction inlet of bathtub water in the jet bath system concerning the embodiment of the present invention. The schematic cross section near the air intake port in the jet bath system according to the embodiment of the present invention. Schematic which shows the structure of the jet bath system which concerns on other embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bathtub, 5 ... Suction port, 7 ... Pump, 9, 91-93 ... Switching valve, 12 ... 1st nozzle, 16 ... 2nd nozzle, 32, 35, 37 ... Air piping, 31 ... Solenoid valve, 34, 36 ... check valve, 41 ... air intake port

Claims (1)

A bathtub that can store bathtub water and has a suction port for sucking in the bathtub water,
A pump that sucks and pressurizes bathtub water from the suction port;
A nozzle that is capable of injecting bubbles into the inside of the bathtub by mixing bubbles into the pressurized bathtub water discharged from the pump;
An air pipe for guiding air in the atmosphere to the nozzle;
A solenoid valve for opening and closing the air pipe;
With
The jet bath system characterized by closing the solenoid valve when driving is started from a state where the pump is stopped.

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