JPS6141004A - Fluid oscillating device - Google Patents

Abstract

PURPOSE:To obtain easy selection of the jet pattern from oscillating jet and non- oscillating jet by providing a bypassing port on a side wall of a fluid passage and a control chamber having a control port communicating to the atmosphere on the other side wall thereof. CONSTITUTION:The liquid flowing from a main passage pipe 16 to a supply passage 18 is injected through a supply nozzle 19. When a control signal pipe 17 is open, both of a bypassing port 24 and a control port 26 are communicated to the atmosphere and atmospheric flows Fa1 and Fb1 are generated, and the jet F1 from the supply nozzle 19 has on both sides thereof the pressure equal to the atmospheric pressure, flowing straightly. On the other hand, when the control signal port 17 is closed, an atmospheric flow Fa2 through the bypassing port 24 is generated to make the pressure at the wall side 20 equal to the atmospheric pressure, but the pressure on the side adjacent to the control chamber 25 becomes below the atmospheric pressure. As the result, the jet F2 from the supply nozzle 19 is deflected toward the side wall 21. Thereafter, when the reflux Fc1 has increased the pressure in the control chamber 25, the jet F2 flows straightly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fluid oscillation element that is used as a spray nozzle in a washing device for washing dishes, a human body, etc. by spraying washing water, and a water sprinkling device.

Structure of a conventional example and its problems A conventional oscillation element is shown in FIG. This element has inlet 1,
Supply nozzle 2, downstream side nozzle provision 1 of this supply nozzle 2
These jet adhesion walls 3 and 4 have control ports 5 and 6 between the supply nozzle 2 and the jet adhesion walls 3 and 4, respectively, and these control ports 5 and 6 are provided in the jet adhesion walls 3 and 4. It is configured to communicate with the feedback lower 8 via a feed bank flow path 9.10. In the above configuration, the inlet 1
The fluid that has flowed in is ejected from the supply nozzle 2. This jet adheres to one of the adhesion walls due to the Coanda effect. Now, assume that the jet adheres to the adhering wall 3. The adhering jet is ejected into the atmosphere from the outlet 11 along the adhering wall 3, but a portion enters the feedback lower 1, passes through the feed bank channel 9, and returns to the control port 5. The flow through the control port 5i changes the adhesion of the jet from the adhesion wall 3 to the adhesion wall 4 side. Thereafter, the above operation occurs on the adhesion wall 4 side, and the jet from the supply nozzle 2 alternately adheres to the adhesion walls 3 and 4 and is ejected into the atmosphere, causing the jet to oscillate.

Since the conventional oscillation element described above is provided with a signal transmission channel such as a feedback channel, this channel is easily blocked and malfunctions occur. When switching between oscillation and stop,
There is no stable region where the oscillation stops, and it is difficult to obtain a stable fixed jet flow.

OBJECTS OF THE INVENTION The object of the present invention is to provide a two-phase fluid oscillation element that allows the jet flow pattern of a cleaning device, a water spray device, etc. to be easily selected between an oscillating jet flow and a non-oscillating jet flow.

Structure of the Invention In order to achieve the above-mentioned objects, the present invention provides a pure fluid element consisting of a supply nozzle, a side wall, and an outlet, with a constriction part provided at the outlet, and a bias port provided on one side of the side wall, and a bias port provided on the other side of the side wall. The control chamber is provided with a control chamber that communicates with the atmosphere, and is particularly designed to prevent droplets from forming at the opening of the control chamber. With this configuration, it is possible to switch the pure fluid element between oscillation and non-oscillation by controlling the communication between the control chamber and the atmosphere.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 [Here, the two-phase fluid oscillation element 12 is
3. It has a laminated structure of an upper plate 14 and a packing 15, and a main flow pipe 16 and a control signal pipe 17 are attached to this element base 131.

FIG. 2 shows a flow path pattern formed on the element substrate 13, where 18 is a supply path, 19 is a supply nozzle, 20.21 is a side wall provided on both downstream sides of the supply nozzle 19, and 22 is a jet outlet. The side wall 20.21 has a constriction 23 at its open end. The side wall 20 has a bias port 2 that communicates with the atmosphere.
4 is a provision. A control chamber 25 is provided on the other side wall 211, and the control chamber 25 communicates with the atmosphere through a control port 26 and further through the control signal pipe 17.

Figures 3, 4, and 5 show the operating states of the elements, and
, F2. F3 is the jet flow, Fal, Fa2°Fa, 3 is the air flow flowing in from the bias port 24, Fbl is the air flow flowing in from the control port 26, Fcl, Fc2 is the main jet flow hitting the constriction part 231, the control room 25 shows the feedback flow back to 25.

FIG. 6 shows an operating state when the opening of the control chamber 25 is small, F4 indicates a jet flow, and ■ indicates an attached vortex.

The operation sequence based on the above configuration will be explained.

First, when the opening of the control signal pipe 17 is opened fX, the liquid that has flowed into the supply path 18 from the main flow pipe 16 is ejected from the supply nozzle 19 (FIG. 3 F1). This jet flow F1 is in communication with the atmosphere in both the bypass port 24 and the control port 26 downstream of the supply nozzle 19, and the air inflow Fa1. Fb1 occurs and the jet moves straight for 1 moment when the pressure on both sides becomes almost equal to atmospheric pressure.

Next, the opening of the control signal pipe 17 is closed. In this case, the liquid flows from the main flow pipe 16 to the supply path 18 and the liquid flows into the supply nozzle 1.
It erupts from 9. This jet stream entrains the surrounding fluid, but the bypass port 24 is in communication with the atmosphere, so that an atmospheric inflow flow Fa2 is generated, and the pressure on the side wall 20 side becomes approximately atmospheric pressure. The control chamber 25 on the opposite side of the jet becomes under atmospheric pressure due to the entrainment action of the jet. The first jet is on the side wall 21
The side guard is deflected (F2 in Figure 4). Deflected jet F2
A part of the fluid hits the constriction portion 23 of the outlet 22, causing reflux Fcl to the upstream side. If the eruption continues, the reflux will flow into control room 2.
5 Fc2), the pressure in the control chamber 25 is increased. As a result, the pressures on both sides of the jet become approximately equal, and the jet travels straight (FIG. 5, F3).

The above-mentioned straight forward movement and deflection of the jet flow are repeated, and the jet flow becomes an oscillating flow.

In this special number and this embodiment, the opening of the control chamber 25 is made large, but in the case where the opening of the control chamber 25 is made small,
When the reflux reaches the opening of the control chamber 25, the opening is filled with water droplets.
(Fig. 6 W). As a result, an attached vortex V is formed, the jet adheres to the side wall 21 and becomes a single flow, and the flow jetting out from the outlet 22 becomes a greatly deflected flow (
Figure 6 F4).

Effect of the invention According to the present invention, the following effects can be obtained.

(1) Since there is no control flow path such as a feed bank flow path within the fluid oscillation element, the flow path pattern is simple and the oscillation operation is stable.

Once the atmospheric pressure is reached, the switching between oscillating and non-oscillating single jets is reliable, and the single jet is stable.

(3) Since the opening of the control chamber is large, the stability of oscillation is improved because there is no jet flow attached during oscillation.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fluid oscillation device showing an embodiment of the present invention, FIG. 2 is a sectional view of the device, FIG. 3 is a sectional view of the device in a non-oscillating state, and FIGS. Each figure is a cross-sectional view showing the oscillation state of the same element, FIG. 6 is a cross-sectional view showing the operation of the same element when the control chamber opening is small, and FIG. 7 is a cross-sectional view of a conventional oscillation element. 19 supply nozzle, 20.21 side wall, 22.
Outlet, 23/throttling part, 24 bypass port,
25 control room, 26 control port. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure π Figure 4 Do 6 Figure 5 Figure 6? 6 Figure 7

Claims (2)

[Claims] (1) Supply nozzle, side walls provided on both sides downstream of the supply nozzle,
A fluid flow path consisting of a bias port on one side wall of an element flow path consisting of a jet outflow path with a constriction section at the downstream end of the side wall, and a control chamber having a control port communicating with the atmosphere on the other side wall. Oscillation element. (2) The adhesion wall side opening of the control chamber is made larger than the adhesion wall side opening of the bias port to prevent the control chamber opening from being blocked by droplets of the working fluid.
Fluid oscillation element described in Section 2.