JPH0810003B2 - Fluid oscillation element - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid oscillating element used for a jetting nozzle of a washing device or a sprinkler for washing dishes and a human body by jetting washing water.

2. Related Art A conventional oscillator is shown in FIG. This element is the supply channel
18, supply nozzle 19, side wall 2 on both sides of the supply nozzle 19 downstream
0,21, claws 22,23 provided at the side wall end and the upper and lower output paths 2
It is composed of 4,25 and.

In the above structure, the fluid flowing from the supply channel 18 is ejected from the supply nozzle 19. This jet is split by the pawls 22 and 23. If the jet is now bent to the left,
A part of the jet flow is split by the left pawl 22 and flows into the left vortex chamber, and the rotational energy and internal pressure of the left vortex increase. On the other hand, the fluid in the vortex chamber on the right side flows out from the gap between the claw 23 and the jet flow and is guided to the output path 24 together with the jet flow. Therefore,
The rotational energy of the vortex on the right side, the internal pressure and the like decrease, and the jet flow is bent to the right side on the opposite side and flows out from the output passage 25 together with the increase of the rotational energy and the internal pressure of the vortex on the left side. The above states are repeated alternately, and oscillation is caused.

In the above conventional oscillation element, since the jet flow ejected from the supply nozzle is ejected from the two output paths, the cleaning nozzle,
When used as a watering nozzle, the spray distribution becomes non-uniform. Further, the optimum value range between the claw portion and the jet flow is narrow, and it is difficult to manufacture an element that stably oscillates.

Problems to be Solved by the Invention In order to solve the above problems, a single jet is used to suppress the dispersion of the jet flow, increase the momentum per unit area of the jet jet, and ensure feedback to the vortex chamber. It is intended to stabilize the oscillation.

The jet flow jetted from the supply nozzle of the action element has the jet outlet as a single jet port, prevents the jet flow from being dispersed, and provides a protrusion at a part of the upstream end of the side wall to flow from the feed passage,
After the jet flow ejected from the supply nozzle is deflected by the pressure difference in the vortex chamber, a part of the jet flow hits the protrusion and is reliably fed back to the vortex chamber to stabilize the oscillation.

EXAMPLE An example of the fluid oscillating device of the present invention will be described below with reference to FIGS.
It will be described with reference to the drawings.

In FIG. 1, the fluid oscillation element 1 has a laminated structure of an element base 2, an upper plate 3 and a packing 4, and a supply flow path pipe 5 is attached to the element base 2.

2 and 3 show flow path patterns formed on the element substrate 2, 6 is a supply flow path, 7 is a supply nozzle, and a supply flow path 6
Are attached at a right angle to the supply nozzle 7. 8,
9 is an upper and lower vortex chamber located downstream of the supply nozzle 7 and having gas inlets 10 and 11 communicating with the outside and having a downstream end in the shape of a throttle 12;
3, 14 are side walls provided on both downstream sides of the throttle portion 12, and 15 are the side walls.
It is an ejection port formed at the downstream open end of 13,14. Further, projecting portions 16 and 17 are provided at parts of the upstream ends of the side walls 13 and 14.

Figure 4 shows the operating state of the element. F _i is the main jet, F _O is the jet, V _L and V _R are the vortices generated in the vortex chambers 8 and 9 by the main jet, and A _L and A. _R is a feedback flow caught in the protrusions 16 and 17 and flowing in the opposite direction in the vortex chamber.

 The operation based on the above configuration will be described.

The liquid that has flowed into the supply channel 6 flows into the supply nozzle 7 from the supply channel. This jet flow is deflected by the vertical pressure difference between the vortex chambers 8 and 9. Now, temporarily, the pressure in the left vortex chamber 8 is low,
It is assumed that the pressure in the vortex chamber 9 on the right side is high. The main jet F _O leans to the left, hits the left protrusion 16, adheres to the left wall 13, is deflected to the left, and jets from the jet port 15 (see FIG. 4).
F _O ). At this time, a part of the flow (A _{L in} FIG. 4) that has shunted against the protrusion 16 flows along the wall of the left vortex chamber 8 to form a vortex V _L.

On the other hand, the air in the vortex chamber 9 on the right side is attracted to the jet flow and discharged together with the jet flow, and the pressure in the control chamber drops. When this pressure drop progresses and the right side pressure becomes lower than the left side pressure, the control chamber differential pressure becomes high on the left side and low on the right side. Due to the pressure difference between the vortex chambers,
The flow that was deflected to the left is deflected to the right and the right wall 14
And is deflected to the right and ejects from the ejection port 15. Hereinafter, the same operation as described in the case of the leftward deflection also occurs during the rightward deflection. Such deflection operation is repeated and self-oscillation occurs.

As described above, in the vortex chamber oscillating element of the present invention, the protrusion provided on one part of the side wall reliably causes the feedback flow to the vortex chamber, and the self-oscillation is very stable.

EFFECTS OF THE INVENTION (1) As described above, since the flow path configuration does not have a signal path such as a feedback flow path, the flow path is simple. Therefore, there is no trouble due to the blockage of the signal path,
The operation is stable and the element is easily manufactured.

(2) Since the claw part that causes the feedback flow is not the entire side surface of the two-dimensional jet flow but its part and the feedback amount is controlled by the projection amount of the claw, the variation of the injection side surface due to the variation in processing Even if it happens,
The jet flow is surely caught on the protruding claw portion, and a feedback flow is always generated, and oscillation is stabilized.

[Brief description of drawings]

FIG. 1 is a perspective view of a fluid oscillating device showing an embodiment of the present invention, FIG. 2 is a flow path pattern diagram of the same fluid oscillating device, and FIG. FIG. 4 is an operation state diagram showing the operation of the fluid oscillating device, and FIG. 5 is a flow path pattern diagram of the conventional oscillating device. 6 ... Supply channel, 7 ... Supply nozzle, 8, 9 ... Vortex chamber, 10,
11 …… Atmosphere communication port, 12 …… Throttle section, 13,14 …… Sidewall, 15
…… Spout, 16,17 …… Projection.

Claims (1)

[Claims] 1. A fluid supply flow path, a supply nozzle provided at a downstream end of the supply flow path, a downstream end of the supply nozzle having a downstream end as a throttle portion, and a vortex flow generated by a jet flow from the supply nozzle. A vortex chamber that is generated, a side wall that is disposed downstream of the narrowed portion and has a downstream opening as a jet outlet, and a protrusion that is provided at a part of the upstream end of the side wall and that is fed back to the vortex chamber by a part of the jet flow. And a fluid oscillation element.