JP4720382B2 - Fluid oscillation nozzle - Google Patents

Description

  The present invention relates to a fluid oscillation nozzle that discharges cleaning water used in a cleaning device such as a sanitary cleaning toilet seat or a bathing shower device.

  Conventionally, sanitary washing toilet seats and the like for washing human parts use a fluid oscillation element that is a kind of fluid element that switches or controls the flow by the fluid itself or the interaction between the fluid flow and the fluid flow. Thus, fluid oscillation nozzles that self-excited oscillating water are used (see, for example, Patent Documents 1 and 2).

  A normal nozzle discharges a direct jet flow in which the cleaning water hits only one point of the human body, so it is necessary for the user to shift the body in order to clean a certain area. Such an inconvenience is eliminated because the area to be hit increases. In addition, with normal nozzles, the wash water concentrates on one point on the human body, so some people may feel pain. With this fluid oscillation nozzle, the location where the wash water hits moves, so the wash The feeling of hitting water can be softened.

  However, whether a soft feeling is desired or whether a strong stimulus is preferred to some extent depends on the individual, so a nozzle that can switch the water discharge state of the washing water between a direct jet flow and a self-excited vibration jet is required.

  As one that enables such switching, a bias port is provided on one side wall of an element flow path comprising a supply nozzle, side walls provided on both downstream sides of the supply nozzle, and a jet flow outflow path having a throttle portion at the downstream end of the side wall, There is known a fluid oscillation element having a control port having a control port communicating with the atmosphere on the other side wall and having an adhesion wall side opening larger than the adhesion wall side opening of the bias port (for example, Patent Documents) 3).

The cleaning nozzle is composed of a nozzle body and a nozzle cap that is mounted on the tip of the nozzle body so as to be rotatable about the axis of the nozzle body. A local cleaning device has also been proposed that has a plurality of cleaning water jets whose caps coincide with the water discharge port of the fluid oscillation element by the rotation of the nozzle cap and an intake port that communicates with the intake port of the vortex chamber of the fluid oscillation element. (For example, refer to Patent Document 4).
Japanese Patent Publication No. 63-60182 JP-A-3-279525 Japanese Patent Publication No. 5-35282 JP-A-8-134984

  However, since the fluid oscillation element described in Patent Document 3 uses a micro deflection of the jet, the swing angle width of the water discharge at the time of oscillation is small, and the self-excited oscillation jet having a sufficient swing angle width is used. It is difficult to get.

  Further, in the local cleaning device described in Patent Document 4, the nozzle cap rotating mechanism rotates the nozzle cap by rotating a spur gear configured to rotate with the nozzle cap holder, for example. In this way, the flush water outlet that is aligned with the water discharge port is switched. This spur gear is rotated by transmitting the rotation of the nozzle cap driving motor through the transmission shaft and the driving gear. Then, after the nozzle cap is rotated to a predetermined position, the nozzle driving motor is rotated, the water supply pipe is advanced, and the nozzle cap is moved to the cleaning position. The transmission shaft is supported by the support arm of the water supply pipe so that it can rotate and cannot move in the axial direction, and the spur gear and the drive gear are moved in a meshed manner, resulting in a large cost. It is not economical in terms.

  In addition to the direct jet flow and the self-excited oscillating jet, if the diffusion flow in which the water discharge spreads can be discharged, the range of choices according to the user's preference is expanded, which is more convenient.

  The present invention has been made in consideration of the above-described circumstances, and provides a fluid oscillation nozzle that can be manufactured at a low cost with a simple configuration, can be switched between a direct jet flow and a self-excited oscillation jet, and can also be switched to a diffusion flow. It is intended to do.

  In order to solve the above-described problem, the fluid oscillation nozzle according to the present invention is located at the terminal end of the main jet discharge flow channel through which the fluid circulates, and the main jet discharge outlet that ejects the fluid as described in claim 1 A side wall that is provided on both downstream sides of the main jet discharge port and that is wider than the main jet discharge port and expands in a tapered manner toward the tip side, and a main jet that is provided on the side wall and is discharged from the main jet discharge port And a pair of control flow outlets for changing the water discharge state of the main jet into a direct jet, a self-excited oscillating jet, and a diffusion flow.

  Preferably, the pair of control flow outlets provided in the side walls are preferably provided at opposing positions as described in claim 2, and as described in claim 3, It is better to be provided in the vicinity of the main jet outlet.

Preferably, the control flow discharge port is provided in a positional relationship in which the control flow is discharged perpendicularly to a central axis extension line of the main jet discharge flow channel as described in claim 4. Is desirable,
Preferably, as described in claim 5, an air introduction port for introducing air may be provided at the center in the width direction immediately below the main jet discharge port.

  Furthermore, as described in claim 6, it is desirable that the pair of control flow discharge ports is supplied with fluid through a pipe branched from a single fluid supply pipe.

  Still further, preferably, the main jet discharge port includes a control mechanism for controlling a fluid supply amount to the main jet discharge port, as defined in claim 7, wherein the control flow discharge port It can be set as the structure provided with the control mechanism which controls the fluid supply quantity to a flow discharge port, Or the said main jet discharge port and the said control flow discharge port are one fluid as described in Claim 8. It is good also as a structure provided with the control mechanism which changes the flow rate ratio of the said main jet discharge port and the said control flow discharge port by the fluid supplied by the pipe line branched from the supply pipe | tube.

  According to the fluid oscillation nozzle of the present invention, it is possible to switch between a direct jet flow, a self-excited oscillation jet flow, and a diffusion flow while being simple and inexpensive.

  An embodiment of a fluid oscillation nozzle according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an overall outline of a first embodiment of a fluid oscillation nozzle 1 according to the present invention.

  As shown in the figure, the fluid oscillation nozzle 1 includes a main jet forming body 2 made of, for example, a synthetic resin, a control flow forming body 3, and a connecting body 4 sandwiched therebetween. In the description of the fluid oscillation nozzle 1 according to the present embodiment, the directions of the X, Y, and Z axes shown in FIG. 1 are referred to as “width direction”, “vertical direction”, and “front-rear direction”, respectively.

  The main jet forming body 2 is connected to an external pipe (not shown) and receives a supply of fluid from this pipe, and extends from the vicinity of the end of the main jet supply pipe 5 and is the end thereof. A main jet discharge passage 6 for limiting the width of the main jet discharge port 7, and side walls 8, 8 </ b> A that are wider than the main jet discharge port and expand in a tapered shape toward the tip side on both downstream sides of the main jet discharge port 7. And a pair of control flow discharge ports 9 and 9A which are provided on the side walls 8 and 8A and which form a flow path for discharging a control flow with respect to the main jet discharged from the main jet discharge port 7. These are formed in the shape of a concave groove in which the plane facing the connector 4 is cut off. Therefore, as the main jet flow forming body 2 alone, a side surface is opened and a pipe line having a closed side surface is formed only after being integrated with the connecting body 4.

  As shown in FIG. 2, the width of the main jet discharge passage 6 is tm, the width in the vicinity of the main jet discharge port 7 between the side walls 8 and 8A is Tw (hereinafter referred to as “side wall width Tw”), and control. The width of the flow discharge channels 9 and 9A is tb. Here, the width Tw in the immediate vicinity of the main jet discharge port 7 between the side walls 8 and 8A is formed larger than the width tm of the main jet discharge passage.

  On the other hand, the control flow forming body 3 is connected to an external pipe (not shown) and receives a supply of fluid from the pipe, and extends from the vicinity of the terminal end of the control flow supply pipe 10 to be bifurcated. Control flow branch pipes 11 and 11A branching to each other. Similar to the main jet forming body 3, these are formed in a concave groove shape in which the plane facing the connecting body 4 is cut off. Therefore, as the main jet flow forming body 2 alone, a side surface is opened and a pipe line having a closed side surface is formed only after being integrated with the connecting body 4.

  Here, the control flow branch pipes 11 and 11A are not necessarily branched from the single control flow supply pipe 10, and may be provided independently. However, the branching from the single control flow supply pipe 10 makes it easier to balance the flow rate and flow rate of both control flows.

  The connecting body 5 that connects the main jet forming body 2 and the control flow forming body 3 faces the terminal ends of the control flow discharge passages 9 and 9A of the main jet forming body 2 and the terminal ends of the control flow branch pipes 11 and 11A. The communication holes 13 and 13A are provided at the positions and communicate with each other. Therefore, the fluid flowing into the control flow supply pipe 10 is guided from the control flow branch pipes 11 and 11A to the control flow discharge flow paths 9 and 9A of the main jet forming body 2 through the communication holes 12 and 12A.

  The fluid oscillation nozzle 1 according to the present embodiment is configured as described above, and the operation state thereof will be described below. First, a case where a fluid is supplied to the main jet supply pipe 5 and no fluid is supplied to the control flow supply pipe 10 will be described.

  The fluid supplied to the main jet supply pipe 5 is guided to the main jet discharge passage 6 and is ejected from the main jet discharge port 7. At this time, since the fluid is not discharged from the control flow discharge passages 9 and 9A, the fluid goes straight from the side without being disturbed. Moreover, since the width tw of the side wall is larger than the width tm of the main jet discharge flow path 6, the main jet is discharged as the direct jet flow F1 without contacting the side walls 8 and 8A when going straight.

  Next, each stage in which the water discharge state changes when the supply of fluid to the control flow supply pipe 10 is started and the flow rate is gradually increased will be described.

  When fluid is supplied from the control flow supply pipe 10 to the control flow discharge ports 9 and 9A via the control flow branch pipes 11 and 11A, the control flow is caught by the main jet flow from the main jet discharge port 7 at a low flow rate. The water from the spouts 9 and 9A is immediately taken away, but as the flow rate increases, the amount of the control flow that stays between the main jet and the side walls 8 and 8A increases, and if the flow rate increases and reaches a certain value. The main jet and the side walls 8, 8A are filled with fluid.

  At this time, due to the processing accuracy of the side walls 8 and 8A, the setting error of the side wall position, the slight imbalance between the left and right control flow rates, the pressure difference between the left and right caused by the turbulent flow, etc., the main jet flows to one side wall side. It is bent and adheres to the wall on one side. If it does so, adhesion to the wall surface of the one side of a main jet will be continued by the Coanda effect.

  As a result, the main jet is discharged as an attached jet F2. For example, when the flow rate R2 of the control flow discharge channel 9A is larger than the flow rate R1 of the control flow discharge channel 9, the main jet becomes an attached jet F2 attached to the side wall 8A as shown in FIG.

  When the flow rate of the control flow is further increased, the pressure P2 of the control flow discharge port 9A decreases due to the action of the jet pump of the main jet that entrains the control flow from the control flow discharge flow path 9A. A relationship of P1> P2 occurs with respect to the pressure P1 of the flow discharge port 9. Due to this pressure difference, the flow rate of the control flow discharge port 9A increases, and the main jet is pushed toward the side wall 8 as shown in FIG. When this pushing force overcomes the adhesion force due to the Coanda effect, the main jet leaves the side wall 8 </ b> A and adheres to the side wall 8.

  Then, a process opposite to the above-described process occurs, and the main jet leaves the side wall 8 and adheres to the side wall 8A again. This phenomenon is repeated to form a self-excited oscillating jet F3 in which the discharge direction of the main jet oscillates left and right.

  When the flow rate of the control flow is further increased, the ratio of the control flow to the main jet flow increases, and both of them are united and become a diffusion flow F4 as shown in FIG.

  As described above, according to the fluid oscillation nozzle according to the present invention, the direct jet flow, the oscillation jet (self-excited oscillation jet), and the diffusion jet can be switched only by changing the ratio of the control flow rate to the main jet flow rate. . Moreover, since the shape of the side walls 8 and 8A can be arbitrarily determined, a self-excited oscillating jet having a sufficient deflection angle width can be obtained. In addition, since such switching can be performed only by the shape of the fluid element without using a complicated mechanism, circuit, etc., it is difficult to break down and the manufacturing cost can be kept low. Can be exchanged.

  Furthermore, as shown in FIG. 6, by providing the air introduction port 17 downstream of the main jet discharge port, air can be mixed into the jet due to the ejector effect. Thereby, while increasing the apparent volume of a jet, soft water discharge is realizable.

  Subsequently, a mechanism for changing the supply amount of the fluid supplied to the main jet supply pipe 5 and the control flow supply pipe 10 of the fluid oscillation nozzle 1 will be described with an example.

  FIG. 7 shows a control flow rate control mechanism 14 that includes, for example, an electromagnetic valve as the main jet flow rate control mechanism 13 that controls the fluid supply amount to the main jet flow supply pipe 5 and controls the fluid supply amount to the control flow supply pipe 10. As shown, a configuration including a separate independent solenoid valve or the like is shown. According to this configuration, since the flow rate of the main jet and the flow rate of the control flow can be controlled independently, for example, it is easy to select a favorite water discharge such as a soft jet direct jet flow or a relatively strong self-excited vibration flow. be able to.

  On the other hand, in FIG. 8, the main jet flow supply pipe 5 and the control flow supply pipe 10 are supplied with fluid through a pipe 16 branched from one fluid supply pipe, and the main jet flow supply pipe 5 and the control flow supply pipe 10 are connected to the control flow supply pipe 10. The example of a structure provided with the flow rate ratio control mechanism 15 which changes both flow rate ratios in the position where the supply pipe | tube 10 branches is shown. According to this configuration, a direct jet flow, a self-excited oscillation flow, and a diffusion flow can be selected with one touch. In this case, the ratio may be changed continuously, or may be changed stepwise to a predetermined constant ratio.

  Next, a modification of the fluid oscillation nozzle according to the present embodiment will be described with reference to FIG. As shown in the figure, the fluid oscillation nozzle of this modification is basically different from the embodiment in the position and direction of the control flow discharge channels 9 and 9A, and the other configurations are substantially the same as those in the embodiment. Therefore, the same reference numerals are given and the description is omitted.

  As shown in the figure, in the fluid oscillation nozzle 1A of this modification, the control flow discharge channel 9 is separated from the main jet discharge port 7, or the pair of control flow discharge channels 9, 9A are opposed to each other. Alternatively, the control flow discharge port 9A is not in a positional relationship in which the control flow is discharged perpendicularly to the central axis extension line of the main jet discharge flow path 6. Even in such a configuration, the above-described action occurs, and a direct jet, a self-excited oscillation jet, and a diffusion jet can be switched.

  However, the more the control flow discharge channel 9 is away from the main jet discharge port 7, that is, the more the control flow discharge channel 9 is separated from the roots of the side walls 8 and 8A, the more the control flow is generated. Necessary. If the pair of control flow discharge passages 9 and 9A are not positioned to face each other, it is difficult to balance the left and right control flows. Further, if the control flow discharge port 9A is not in a positional relationship in which the control flow is discharged perpendicularly to the central axis extension line of the main jet discharge flow path 6, the discharged control flow works effectively on the main jet flow. I have a hard hate.

  Therefore, i) the control flow discharge channels 9 and 9A are as close to the main jet discharge port as possible, ii) the pair of control flow discharge channels 9 and 9A are in positions facing each other, iii) the control flow discharge flow The fact that the control flow is in a positional relationship in which the control flow is discharged perpendicularly to the central axis extension line of the main jet discharge flow path 6 is a point that enhances the effect of the fluid oscillation nozzle.

  Finally, we report the results of experiments conducted using such a fluid vibrating nozzle. FIG. 10 shows the experimental results of nozzles with tm = 0.75 mm, tb = 1.5 mm, and tw = 1.5 mm. In FIG. 10A, the horizontal axis represents the flow rate of the main jet discharge flow path, and the vertical axis represents the flow rate. In FIG. 10B, the horizontal axis represents the flow velocity of the main jet discharge channel, and the vertical axis represents the flow velocity of the control flow discharge channel. The arrows in the figure represent the conditions of the photograph shown in FIG. (2) represents a flow rate condition that changes from a direct jet flow to an adhering jet on one side wall surface, and ● represents a flow rate condition that changes from an adhering jet flow on one side wall surface to a self-excited oscillating jet that repeats adhesion and separation on the left and right wall surfaces. According to this experimental result, it can be seen that the water discharge state can be switched well.

  The embodiments described above are for illustrative purposes and do not limit the scope of the invention. Accordingly, those skilled in the art can employ embodiments in which each or all of these elements are replaced by equivalents thereof, but these embodiments are also included in the scope of the present invention.

The disassembled perspective view which shows the outline | summary of one Embodiment of the fluid oscillation nozzle which concerns on this invention. The figure which shows the fluid oscillation nozzle in case a water discharge state is a direct jet flow. The figure which shows the fluid oscillation nozzle in case the water discharge state is the adhesion jet flow to one side wall surface. The figure which shows the fluid oscillation nozzle in case a water discharge state is a self-excitation jet. The figure which shows the fluid oscillation nozzle in case a water discharge state is a diffusion flow. The figure which shows the fluid oscillation nozzle which provided the air inlet. The figure which shows an example of the mechanism which changes the supply amount of the fluid supplied to the fluid oscillation nozzle in this embodiment. The figure which shows the other example of the mechanism which changes the supply amount of the fluid supplied to the fluid oscillation nozzle in this embodiment. The figure which shows the modification of the fluid oscillation nozzle which concerns on this embodiment. The figure which shows the experimental result of a fluid oscillation nozzle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Fluid oscillation nozzle 2 Main jet formation body 3 Control flow formation body 4 Connection body 5 Main jet supply pipe 6 Main jet discharge flow path 7 Main jet discharge port 8, 8A Side wall 9, 9A Control flow discharge flow path 10 Control flow Supply pipe 11, 11A Control flow branch pipe 12, 12A Communication hole 13 Main jet flow control mechanism 14 Control flow control mechanism 15 Flow rate control mechanism 16 Pipe 17 Air inlet F1 Direct jet F2 Adhesive jet F3 Self-excited vibration jet F4 Diffusion Flow

Claims (8)

A main jet discharge port which is located at the end of the main jet discharge flow path for circulating the fluid and jets the fluid;
Side walls provided on both sides of the downstream side of the main jet discharge port, which are wider than the main jet discharge port and expand in a tapered shape toward the tip side;
A pair of control flows that are provided on the side wall to discharge a control flow to the main jet discharged from the main jet outlet and change the water discharge state of the main jet into a direct jet, a self-excited oscillation jet, and a diffusion flow A discharge port;
A fluid oscillation nozzle comprising: The fluid oscillation nozzle according to claim 1, wherein the pair of control flow discharge ports provided on the side wall are provided at opposing positions. The fluid oscillation nozzle according to claim 1, wherein the control flow discharge port is provided in the vicinity of the main jet discharge port. The fluid oscillation nozzle according to claim 1, wherein the control flow discharge port is provided in a positional relationship in which the control flow is discharged perpendicularly to a central axis extension line of the main jet discharge flow path. The fluid oscillation nozzle according to claim 1, further comprising an air introduction port for introducing air at a center in a width direction immediately below the main jet discharge port. The fluid oscillation nozzle according to any one of claims 1 to 5, wherein the pair of control flow discharge ports is supplied with fluid through a pipe branched from a single fluid supply pipe. The main jet discharge port includes a control mechanism that controls a fluid supply amount to the main jet discharge port, and the control flow discharge port includes a control mechanism that controls a fluid supply amount to the control flow discharge port. The fluid oscillation nozzle according to any one of claims 1 to 6. The main jet discharge port and the control flow discharge port are supplied with fluid by a pipe branched from a single fluid supply pipe, and the flow rate ratio of the main jet discharge port and the control flow discharge port is set to the branch position. The fluid oscillation nozzle according to claim 1, further comprising a control mechanism for changing.

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