JPH09315270A - Washer nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inject a liquid in a proper expanse and a pertinent pressure distribution. SOLUTION: This washer nozzle is provided with a pipe part 14, a flow passage 12 of cleaning solution consisting of a throttle part 16 where a tip of this pipe part 14 is gradually narrowed and formed into a rectangular section, and an enlarged part 18 yet more expanding from this throttle part 16, a elongated jet hole 12b being formed at the outside of this enlarged part 18, and a straightening plate 30 to be installed in the flow passage 12 ranging from the throttle part 16 to the enlarged part 18, and extending up to somewhere short of the elongated jet hole 12b, respectively and this straightening plate 30 is set up in a spot being somewhat shifted as far as the specified distance from a center axis in the longitudinal direction of the pipe part 14, along an expanding direction of the enlarged part 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer nozzle for ejecting liquid with appropriate pressure distribution and spread.

[0002]

BACKGROUND OF THE INVENTION For example, a vehicle is generally provided with a window washer device in addition to a wiper device. The window washer device sprays a cleaning solution onto a windshield and wipes it with a wiper blade. ing.

Here, when the window washer device is provided on the engine hood, it is preferable that the cleaning liquid is sprayed with a vertically long spread and does not hinder the driver's view. That is, it is preferable that the jetting is performed so as not to spread in the lateral direction. For that purpose, it is necessary to improve the washer nozzle.

Further, especially when the vehicle is traveling at high speed, the cleaning liquid is less likely to fly due to the wind pressure, so that the landing point is lowered. In order to avoid this, it is conceivable to increase the injection pressure of the cleaning liquid, but for that purpose, it is necessary to improve the pump and the like. Alternatively, it is conceivable to give a pressure distribution to the injection of the cleaning liquid so that the pressure is high above and low below. For that reason, it is necessary to improve the washer nozzle.

The present invention has been made in view of the above demands, and an object of the present invention is to provide a washer nozzle for ejecting a liquid with an appropriate spread and an appropriate pressure distribution.

[0006]

In order to achieve the above object, the invention according to claim 1 is a washer nozzle for ejecting a liquid toward a portion to be cleaned, wherein a long hole ejection port for ejecting the liquid is provided. A flow passage for guiding the liquid to the long hole injection port, the flow passage being connected to the pipe portion and having an inner diameter narrowed along the flow direction of the liquid connected to the pipe portion. A narrowed portion, and an enlarged portion that is formed between the narrowed portion and the elongated hole injection port and that extends asymmetrically with respect to the central axis of the pipe portion along the longitudinal direction of the elongated hole injection port. It is characterized by having.

According to the present invention, the liquid is jetted through the flow passage in the order of the pipe portion, the throttle portion and the enlarged portion. Here, since the narrowed portion is narrowed when flowing through the narrowed portion from the pipe portion, the liquid is compressed and then atomized. Then, in the expansion section, the atomized liquid spreads. Therefore, by arranging the expanded portion so as to expand in the vertical direction, it is possible to provide the liquid with an appropriate expansion as a washer nozzle for a vehicle, for example.

Moreover, the enlarged portion is asymmetrically expanded with respect to the central axis of the pipe portion, and the injection pressure becomes low on the side where the expansion is large. Therefore, if the enlarged portion is greatly expanded in the direction opposite to the side requiring the high injection pressure, the injection pressure on the expanded side becomes low. Then, the injection pressure on the opposite side becomes higher. In this way, a predetermined pressure distribution can be given to the liquid.

According to a second aspect of the present invention, in a washer nozzle for ejecting a liquid toward a portion to be cleaned, a long hole jet port for jetting the liquid and a flow passage for guiding the liquid to the long hole jet port. And a current plate provided in the flow passage, wherein the flow passage has a pipe portion having a predetermined inner diameter, and a throttle portion connected to the pipe portion and having a narrow inner diameter along the flow direction of the liquid. An enlarged portion that is formed between the narrowed portion and the long hole injection port and that extends along the longitudinal direction of the long hole injection port, the straightening plate being provided on the central axis of the pipe portion. On the other hand, the long hole injection port is arranged at a position displaced by a predetermined distance in the longitudinal direction.

According to the present invention, the straightening vane is provided in the flow passage, and the straightening vane is arranged at a position displaced by a predetermined distance in the longitudinal direction of the long hole injection port with respect to the central axis of the pipe portion. Therefore, a large jet port and a small jet port are formed respectively. Then, the pressure of the liquid ejected from the large ejection port becomes low. On the other hand, the pressure of the liquid ejected from the small ejection port becomes high. In this way, a predetermined pressure distribution can be given to the liquid. In other words, due to the deviation of the straightening vanes, the enlarged portion has an asymmetrical shape with respect to the central axis of the pipe portion, and the pressure distribution is changed.

According to a third aspect of the present invention, in the washer nozzle according to the first or second aspect, a jet and a nozzle main body for holding the jet are provided, and the jet has the long hole injection port and the flow passage. Are formed.

The present invention is a washer nozzle having a jet and a nozzle body, and other configurations and operations are the same as those of the invention according to claim 1 or claim 2.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2A is a diagram showing an automobile including the washer nozzle 1 according to the present embodiment, and FIG. 2B is a vertical cross-sectional view of the washer nozzle 1. The jet 10 is held by the nozzle body 20 and provided on the engine hood 110 of the automobile 100, and jets the cleaning liquid toward the front window 120. The nozzle body 20 is supplied with the cleaning liquid to the jet 10 through the flow passage 22, and the opening 2
The cleaning liquid can be sprayed from No. 4.

FIG. 1D is a perspective view of the jet 10. And, the same figure (A) is the AA line sectional view of the same figure (D), the same figure (B) is the BB line sectional view of the same figure (D), the same figure (C). It is the figure seen in the arrow C direction in the same figure (D).

The jet 10 has a shape obtained by combining a spherical portion 10a and a cylindrical portion 10b, and is held by the nozzle body 20 by the spherical portion 10a. In addition, a flow passage 12 is formed from the spherical portion 10a to the column portion 10b. The opening 12a of the flow passage 12 on the side of the spherical portion 10a communicates with the flow passage 22 of the nozzle body 20. The long hole injection port 1 of the flow passage 12 on the side of the column portion 10b
2b faces the opening 24 side of the nozzle body 20 and opens to the outside.

The flow passage 12 includes a pipe portion 14 and a throttle portion 16.
And an expansion unit 18. The pipe portion 14 has a cylindrical shape with a constant inner diameter and has an opening 12a formed on one side. A throttle portion 16 is continuously formed on the other side of the pipe portion 14. The narrowed portion 16 is a portion formed by gradually narrowing opposite regions of the end portion of the pipe portion 14, and the cross-sectional shape of the tip is a vertically long rectangle. Specifically, the throttle portion 16 is vertically long with respect to the mounting state of the jet 10.

The enlarged portion 18 has a shape that extends from the tip of the narrowed portion 16 so as to be vertically longer along the longitudinal direction thereof. However, the width of the enlarged portion 18 in the lateral direction is
It has the same width as the width of the narrowed portion 16.

The flow passage 12 is provided with a straightening plate 30 that partially blocks the flow of the cleaning liquid. Rectifying plate 30
Are provided so as to be displaced from the central axis of the pipe portion 14 (shown by a chain line in FIG. 1B) along the direction in which the enlarged portion 18 extends. Specifically, the jet 10 is deviated downward with reference to the attached state. However, the current plate 12
Is positioned so that an opening is also formed on the lower side thereof.

Further, the current plate 30 is provided from the central portion of the throttle portion 16 to the enlarged portion 18 and before the elongated hole injection port 12b. Here, since the current plate 30 is not provided before the elongated hole ejection port 12b and up to the elongated hole ejection port 12b, the cleaning liquid to be ejected is not divided into two.

The present embodiment is configured as described above, and its operation will be described below. First, when a pump (not shown) is driven, the cleaning liquid passes through the flow passage 22 of the nozzle body 20 and is sent to the flow passage 12 from the long hole injection port 12 a of the jet 10. The cleaning liquid sent to the pipe portion 14 of the flow passage 12 is compressed by the throttle portion 16 and atomized at the outlet thereof. Then, the atomized cleaning liquid is expanded 18
Then, the cleaning liquid also spreads in the direction in which the expanded portion 18 spreads. Here, since the expansion part 18 is expanded in the vertical direction with reference to the attachment state of the jet 10, the atomized cleaning liquid is also expanded in the vertical direction. That is, FIG.
The cleaning liquid spreads in the vertical direction of the front window 120 shown in (A). This way of spreading the cleaning liquid
Most preferred.

Further, the flow of the cleaning liquid is obstructed by the flow straightening plate 30, and the injection pressure increases on the upper and lower side surfaces of the straightening flow plate 30. However, since the rectifying plate 30 is located away from the central axis of the flow passage 12, as shown in FIG.
The injection pressure on the side of wide opening becomes low. That is, with reference to the mounting state of the jet 10, the straightening plate 30 is moved downward.
Is shifted, the injection pressure on the upper side becomes low. In addition,
On the right side of FIG. 1B, a graph in which the vertical axis represents the spread of the cleaning liquid and the horizontal axis represents the injection pressure is shown. As is clear from this graph, the injection pressure on the upper side is low.

According to this embodiment, a predetermined pressure distribution can be given to the cleaning liquid to be sprayed as described above.

Next, FIGS. 3A to 3C are views showing a modification of the embodiment according to the present invention. It should be noted that the graphs similar to those in FIG. 1B are also shown on the right side in each of FIGS.

The jet 46 shown in FIG. 3 (B) is different from the jet 10 shown in FIG. 1 (B) in that the enlarged portion 48 is expanded only in one direction (downward) and there is no flow straightening plate. . Although the jet 46 spreads only in one direction, the cleaning liquid spreads vertically by the expanding portion 48.

Further, since the expanding portion 48 expands in only one direction, the injection pressure of the cleaning liquid decreases on the expanding side.

FIG. 3 (A) shows a jet 40 in which a current plate 44 is added to the jet 46. Since the jet 40 also has the enlarged portion 42 extending in only one direction, the jetting pressure of the cleaning liquid decreases on the originally enlarged side, but the straightening plate 44 is provided on the side where the enlarged portion 42 expands from the central axis. Therefore, the injection pressure on the side where the straightening plate 44 deviates from the central axis becomes higher. Therefore, by providing the straightening plate 44, it is possible to form a pressure distribution in which one pressure is increased.

Further, FIG. 3C shows a jet 50 in which the enlarged portion 52 is composed of an inclined surface 52a which expands slightly downward in the figure and an inclined surface 52b which expands downward greatly. There is. On the side of the inclined surface 52b that greatly expands, the injection pressure of the cleaning liquid decreases, so that it is possible to form a pressure distribution that is relatively biased to one side with respect to the side of the inclined surface 52a that slightly expands.

Next, FIG. 4 is a view for explaining the front shape of the long hole injection port applicable to the present invention (however, there is no straightening plate). For example, in FIG. 4A, the long hole injection port 60
A jet 58 having a vertically long rectangular shape is shown to form a pressure distribution as shown on the right side.

In FIG. 4 (B), the long hole injection port 64 is shown as a jet 62 having a constricted zigzag shape at the center so as to form a pressure distribution as shown on the right side. .

In FIG. 4C, the elongated hole injection port 68 shows an elliptical jet 66, which forms a pressure distribution as shown on the right side.

In FIG. 4D, a jet 70 having a triangular shape is shown as the long hole injection port 72, and a pressure distribution as shown on the right side is formed.

A desired pressure distribution can be formed by applying the long hole injection port having these shapes to the present invention.

[0033]

[Brief description of drawings]

FIG. 1 (D) is a perspective view of a jet according to an embodiment, FIG. 1 (A) is a sectional view taken along line AA of FIG. 1 (D), and FIG. 1 (B) is the same. It is a BB line sectional view of a figure (D), and the figure (C) is a figure seen in the arrow C direction in the figure (D).

FIG. 2A is a diagram showing an automobile including a washer nozzle according to the present embodiment, and FIG. 2B is a longitudinal sectional view of the washer nozzle.

3 (A) to 3 (C) are views showing a modification of the embodiment according to the present invention.

FIG. 4 is a diagram illustrating a front shape of a long hole injection port applicable to the present invention.

[Explanation of symbols]

 1 Washer nozzle 10, 40, 46 Jet 12 Flow path 12b Long hole injection port 14 Pipe part 16 Throttling part 20 Nozzle body 18, 42, 48 Enlarged part 30, 44 Straightening plate 120 Front window (cleaning part)

Claims (3)

[Claims] 1. A washer nozzle for injecting a liquid toward a portion to be cleaned, comprising: a long hole injection port for injecting the liquid; and a flow passage for guiding the liquid to the long hole injection port, The flow passage is formed between a pipe portion having a predetermined inner diameter, a throttle portion connected to the pipe portion and narrowing the inner diameter in the flow direction of the liquid, and between the throttle portion and the long hole injection port. And a widened portion which is asymmetrical with respect to the central axis of the pipe portion and extends along the longitudinal direction of the long hole injection port. 2. A washer nozzle for injecting a liquid toward a portion to be cleaned, a long hole injection port for injecting the liquid, a flow passage for guiding the liquid to the long hole injection port, and an inside of the flow passage. The flow passage includes a pipe portion having a predetermined inner diameter, a throttle portion connected to the pipe portion and having an inner diameter narrowed along a flow direction of the liquid, the throttle portion and the pipe. An enlarged portion that is formed between the long hole injection port and that extends along the longitudinal direction of the long hole injection port; and the straightening plate is the long hole with respect to the central axis of the pipe part. A washer nozzle, wherein the washer nozzle is arranged at a position displaced by a predetermined distance in the longitudinal direction of the ejection port. 3. The washer nozzle according to claim 1 or 2, further comprising: a jet and a nozzle body that holds the jet, wherein the jet has the long hole injection port and the flow passage formed therein. Characteristic washer nozzle.