JPH10202149A - Washer nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer nozzle in which a proper injection pattern according to the shape of window glass is easily constituted. SOLUTION: A jet 10 in the washer nozzle injecting liquid toward a part to be washed is equipped with an injection port 13 through which liquid is injected and with a flow path 12 guiding liquid to the injection port 13. The flow path 12 is provided with a pipe part 16 having prescribed inner diameter and with a throttle part 16 connected to the pipe part 14 and has inside diameter gradually narrowed toward the injection port 13. At least one hand of the throttle part 16 and the injection port 13 has an asymmetrical shape part for the center axis of the pipe part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer nozzle which diffuses and sprays a liquid in the form of a mist to obtain an appropriate flow distribution on a surface to be wiped.

[0002]

BACKGROUND OF THE INVENTION Generally, a vehicle is provided with a washer device in addition to a wiper device, and a cleaning liquid is sprayed onto a window glass surface by the washer device and wiped by a wiper blade.

As conventional washer devices, for example, Japanese Patent Publication No. 64-2540, Japanese Patent Publication No. 2-58139, Japanese Patent Application Laid-Open No. 59-120260, and Japanese Patent Application Laid-Open No.
No. 27542, JP-A-61-57452 and JP-A-62-86265 are known.

[0004] Here, it is preferable that the cleaning liquid sprayed from the washer nozzle is sprayed in a mist form with a predetermined spread (pointwise) so as not to obstruct the driver's view. It is more preferable that the fuel is injected with an appropriate flow rate distribution. That is, it is preferable to form the spray pattern such that when the cleaning liquid is sprayed in the form of a mist, and when the cleaning liquid lands on the window glass surface, the density of the liquid is generated at a desired position on the glass surface.

However, window glasses for automobiles and the like are:
In many cases, it is greatly inclined and curved with respect to the nozzle injection port (the plane formed by the nozzle injection port), and it is difficult to set an appropriate injection pattern according to the difference in the inclination angle and the curvature depending on the vehicle type It is.

That is, the above-mentioned conventional washer nozzle is
Although a desired spray pattern can be obtained on a plane parallel to the nozzle injection port (the plane formed by the nozzle injection port), an inclined / curved window glass surface has an area per unit area above the glass. A large unevenness occurs in the density of the liquid, such as a small amount of water and a large amount of water landing below. Therefore, it is not possible to cause a predetermined amount of liquid volume to reach a predetermined position on the window glass surface with water. Therefore,
Further improvements in the washer nozzle are needed.

The present invention has been made in view of the above-mentioned needs, and has as its object to provide a washer nozzle capable of easily forming an appropriate ejection pattern according to the shape of a window glass.

[0008]

According to a first aspect of the present invention, there is provided a washer nozzle for ejecting a liquid toward a portion to be cleaned, comprising: an ejection port for ejecting the liquid; A flow path for guiding a liquid to the injection port, wherein the flow path is a pipe having a predetermined inner diameter, and a constriction section which is connected to the pipe and has an inner diameter that gradually decreases toward the injection port. Wherein at least one of the throttle section and the injection port has an asymmetric shape portion with respect to a center axis of the pipe section.

According to the first aspect of the invention, the liquid flows through the flow passage in the order of the pipe portion and the throttle portion, and is jetted from the jet port. Then, since the throttle portion is narrowed, when flowing through the throttle portion from the pipe portion, the liquid is compressed and then sprayed in a mist state. Here, since the throttle portion has an asymmetric shape portion with respect to the central axis P of the pipe portion, the liquid is compressed while flowing in different directions (at different angles) with respect to the central axis P of the pipe portion when being compressed. Is done. As a result, a difference occurs in the flow speed of the liquid, and a partial deviation occurs in the amount of the liquid sprayed in the form of a mist. In addition, when the injection port has an asymmetrical portion with respect to the central axis P of the pipe portion, a partial deviation of the liquid amount occurs at the time of injection. The unevenness in the amount of the liquid is ejected so as to correspond to the shape of the surface to be cleaned (for example, the amount of water landing is increased toward the upper side of the surface to be cleaned and the amount of landing is decreased toward the lower side of the surface to be cleaned). Water can be applied to a predetermined position on the surface with a desired amount of liquid.

According to a second aspect of the present invention, there is provided a washer nozzle for ejecting a liquid toward a portion to be cleaned, comprising an ejection port from which the liquid is ejected, and a flow passage for guiding the liquid to the ejection port. The flow passage has a pipe portion having a predetermined inner diameter, and a constriction portion connected to the pipe portion and having an inner diameter gradually narrowing toward the injection port, and a central axis Q ′ of the constriction portion is It is characterized by being inclined with respect to the center axis P 'of the pipe portion.

According to the second aspect of the invention, the liquid flows through the flow path in the order of the pipe and the throttle, and is injected from the injection port. Then, since the throttle portion is narrowed, when flowing through the throttle portion from the pipe portion, the liquid is compressed and then sprayed in a mist state. Here, since the central axis Q 'of the constricted portion is inclined with respect to the central axis P' of the pipe portion, the liquid is compressed in a different direction (different direction) with respect to the central axis P 'of the pipe portion. (At an angle) compressed as it flows. As a result, a difference occurs in the flow speed of the liquid, and a partial deviation occurs in the amount of the liquid sprayed in the form of a mist. By jetting the deviation of the amount of liquid in accordance with the shape of the surface to be cleaned, it is possible to cause a predetermined amount of liquid volume to reach a predetermined position on the surface to be cleaned.

According to a third aspect of the present invention, there is provided a washer nozzle for ejecting a liquid toward a portion to be cleaned, an ejection port from which the liquid is ejected, a flow path for guiding the liquid to the ejection port, and a flow passage for the liquid. A flow straightening plate provided in the 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 an inner diameter gradually narrowing toward the injection port. The rectifying plate is arranged at a position shifted by a predetermined distance from a center axis P ″ of the pipe portion.

According to the third aspect of the present invention, the rectifying plate is provided in the flow passage, and the rectifying plate is disposed at a position shifted by a predetermined distance from the center axis P ″ of the pipe portion. As a result, the amount of flowing liquid is biased, and as a result,
Since the liquid is compressed in a state where the liquid amount is uneven at the throttle portion, a partial unevenness occurs in the liquid amount of the liquid ejected in the form of mist. By jetting the deviation of the amount of liquid in accordance with the shape of the surface to be cleaned, it is possible to cause a predetermined amount of liquid volume to reach a predetermined position on the surface to be cleaned.

According to a fourth aspect of the present invention, in the washer nozzle according to any one of the first to third aspects, the liquid connected to the ejection port and ejected from the ejection port outside the flow passage. It is characterized by having an expansion regulation part which regulates the spread of.

According to the fourth aspect of the present invention, the liquid can be jetted in a limited range on the surface to be cleaned.

According to a fifth aspect of the present invention, there is provided the washer nozzle according to any one of the first to fourth aspects, further comprising a jet and a nozzle body for movably holding the jet. A mouth and the flow passage are formed.

According to the fifth aspect of the present invention, since the jet and the nozzle main body are movably held, the direction of the jet formed in the jet with respect to the surface to be cleaned can be changed, and the liquid amount is uneven. The landing point of the amount of liquid sprayed on the surface to be cleaned can be changed.

[0018]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIG. 2A is a view showing an automobile equipped with a washer nozzle 1 according to a first embodiment, and FIG. 2B is a longitudinal sectional view of the washer nozzle 1. As shown in FIG. . Washer nozzle 1 is provided in engine hood 110 of automobile 100 and has front window 120.
The cleaning liquid is sprayed toward. The washer nozzle 1 includes a jet 10 and the jet 10
And a nozzle body 20 that holds The nozzle body 20 can supply the cleaning liquid to the jet 10 through the flow passage 22 and can spray the cleaning liquid from the opening 24.

FIG. 1 is a perspective view of the jet 10. 3A is a cross-sectional view taken along line AA of FIG. 1, FIG. 3B is a cross-sectional view taken along line BB of FIG. 1, and FIG. It is.

The jet 10 has a surface 10a formed in a part of a sphere, and a flow passage 12 formed therein. In the flow passage 12, the injection port 13 formed on the surface 10 a side is one of the openings, and the other of the openings is connected to the flow passage 22 of the nozzle body 20.
(See FIG. 2B).

The flow passage 12 is composed of a cylindrical pipe portion 14 having a constant inner diameter and a throttle portion 16 having a gradually decreasing cross-sectional shape. The tip of the throttle portion 16 is connected to the injection port 13. .

Here, the central axis P of the pipe portion 14 and the central axis Q of the injection port 13 are shifted as shown in FIG. In other words, the injection port 13 is formed asymmetrically with respect to the central axis of the pipe portion 14.
Moreover, as shown in FIG. 3 (C), the injection port 13 is large on the upper side and smaller on the lower side, and is also asymmetric with respect to the center axis Q. Also, the throttle section 16 is configured such that the upper side is greatly narrowed and the lower side is slightly narrowed, and is asymmetric with respect to the central axis P of the pipe section 14.

By doing so, the flow rate of the mist liquid ejected from the ejection port 13 can be biased.
More specifically, in FIG. 3A, the throttle 16 is greatly throttled on the upper side and slightly narrowed on the lower side, so that the liquid flowing through the pipe 14 is greatly compressed on the upper side and is significantly compressed on the lower side. Does not compress much. Therefore, when the liquid is ejected from the ejection port 13, the lower liquid has a high pressure and thus is ejected in a large amount, and the upper liquid has a relatively low pressure and a small amount of the liquid. Moreover, since the ejection port 13 has a large opening on the upper side and a small opening on the lower side, a large amount of liquid is ejected on the upper side also from this point.

As a result, as shown in FIG. 4, the flow rate of the liquid ejected from the washer nozzle 1 is large on the upper side and smaller on the lower side. FIG. 3 is a diagram showing the relationship between the flow rate and the spread of the washer nozzle according to the present embodiment in correspondence with the position of the window glass. As shown in the figure, in the vehicle, since the window glass 120 is inclined, the distance from the washer nozzle 1 to the upper portion of the window glass 120 is long, and the distance to the lower portion is short. Therefore, as described above, when a large amount of liquid is ejected from the washer nozzle 1 on the upper side and a small amount of liquid is ejected from the washer nozzle 1, the window glass 120 is allowed to land on the upper and lower portions at substantially equal flow rates as shown in FIG. Can be. FIG. 5 is a diagram showing the distribution of the amount of liquid jetted from the washer nozzle onto the window glass.

In this embodiment, a U-shaped groove 18 is formed on the surface 10a of the jet 10, and the U-shaped groove 18
An injection port 13 is formed therein. Therefore, the injection port 13 is surrounded by the inner wall of the U-shaped groove 18, and the spread of the liquid to be injected is restricted. The U-shaped groove 18 is formed so as to extend in the up-down direction. Therefore, as shown in FIG. 5, the spread of the liquid in the horizontal direction is restricted, and the liquid is ejected so as to be distributed longer in the height direction.

FIG. 6 is a view showing a modification of the above embodiment. The jet 30 shown in FIG.
A V-shaped groove 38 is formed instead of the V-shaped groove 18. FIG. 7A is a diagram showing a modification of the above embodiment, and FIG. 7B is a front view thereof. The groove 48 of the jet 40 shown in the figure is a combination of an upper U-shaped groove 48a and a lower V-shaped groove 48b.

Even with such a V-shaped groove 38 or groove 48, it is possible to regulate the spread of the liquid to be jetted.

The jets 33, 43 of these jets 30, 40 are similar to the jets 13 shown in FIG. 3C in that the upper side is larger and the lower side is smaller.

FIG. 8A is a view showing a modification of the above embodiment, and FIG. 8B is a front view thereof. The groove 58 of the jet 50 shown in FIG.
And a narrow groove 58b. Correspondingly, the injection port 53 also has a large opening 53a and a small opening 53b.
Consists of The other configuration is the same as in the above embodiment.

In this modification, the liquid is jetted from the opening 53a at a high flow rate, and the liquid is jetted from the small opening 53b at a low flow rate. Then, a liquid amount distribution as shown in FIG. 4 can be obtained.

(Second Embodiment) Next, FIG. 9A is a view showing a second embodiment, and FIG. 9B is a diagram showing the amount and spread of the liquid ejected in the second embodiment. FIG.

In the jet 60 shown in FIG. 9A, the central axis P 'of the pipe portion 64 and the central axis Q' of the throttle portion 66 intersect. That is, the central axis Q 'is inclined with respect to the central axis P'. In addition, the injection port 63 is
It is formed at a position where the central axis Q 'passes. Therefore,
The liquid passing through the pipe portion 64 flows with a small compression ratio in the direction of the central axis Q ′, and is compressed while flowing in the direction of the central axis P ′. Then, the fluid pressure increases and the flow rate increases from the central axis Q 'toward the central axis P'. Thus,
A flow rate distribution as shown in FIG. 9B can be formed.

In this embodiment, the injection port 63 is also provided.
Is larger on the upper side where the hydraulic pressure is high and smaller on the lower side where the hydraulic pressure is low, so that the flow rate distribution due to the hydraulic pressure difference is not hindered.

(Third Embodiment) Next, FIG.
It is a longitudinal cross-sectional view which shows 3rd Embodiment, FIG.10 (B) is the front view, FIG.10 (C) is a figure which shows the relationship between the liquid amount of the liquid to be injected, and spreading.

The jet 70 shown in FIG. 10A has a flow straightening plate 80 in the throttle section 76. Specifically, the current plate 80
Is disposed at a position shifted downward from the central axis P ″ of the pipe portion 74. By providing this rectifying plate 80,
The flow of liquid through the pipe portion 74 is obstructed, and the current plate 80
A large amount of liquid flows to the side without the liquid. Then, the liquid is compressed by the throttle portion 76 while the flow rate is uneven, so that a difference occurs in the flow rate of the liquid ejected from the ejection port 73. Thus, a flow rate distribution as shown in FIG. 10B can be obtained. That is, the flow rate is low on the lower side where the rectifying plate 80 is provided, and increases on the upper side.

The current plate 80 may be provided in the pipe section 74. However, in order to compress the liquid in a state where the flow rate is uneven, it is preferable to provide the rectifying plate 80 immediately before the throttle unit 76.

[0038]

[Brief description of the drawings]

FIG. 1 is a perspective view of a jet according to an embodiment.

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.

FIG. 3A is a sectional view taken along line AA of FIG. 1;
FIG. 3B is a sectional view taken along line BB of FIG.
Is a front view of the jet.

FIG. 4 is a diagram illustrating a relationship between a flow rate and a spread of a washer nozzle according to the present embodiment in correspondence with a position with respect to a window glass.

FIG. 5 is a diagram showing a distribution of liquid jetted from a washer nozzle landing on a window glass.

FIG. 6 is a diagram showing a modification of the first embodiment.

FIG. 7A is a diagram showing a modification of the first embodiment, and FIG. 7B is a front view thereof.

FIG. 8A is a diagram showing a modification of the first embodiment, and FIG. 8B is a front view thereof.

FIG. 9A is a diagram showing a second embodiment,
FIG. 9B is a diagram showing the relationship between the amount of liquid ejected and the spread in the second embodiment.

FIG. 10A is a longitudinal sectional view showing a third embodiment, FIG. 10B is a front view thereof, and FIG.
(C) is a diagram showing the relationship between the amount of liquid to be ejected and the spread.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washer nozzle 10, 30, 40, 50, 60, 70 Jet 12 Flow path 13, 33, 43, 53, 63, 73 Injection port 14, 64 Pipe section 16, 66 Throttle section 18 U-shaped groove (enlargement regulation section) 38 V-shaped groove (enlargement control part) 48, 58 groove (enlargement control part) 20 Nozzle body 80 Rectifier plate 120 Front window (part to be cleaned)

Claims (5)

[Claims] 1. A washer nozzle for ejecting a liquid toward a portion to be cleaned, comprising: an ejection port from which the liquid is ejected; and a flow passage for guiding the liquid to the ejection port. A pipe portion having a predetermined inner diameter, and a constriction portion connected to the pipe portion and having an inner diameter gradually reduced toward the injection port, wherein at least one of the restriction portion and the injection port is A washer nozzle having an asymmetric shape portion with respect to a central axis P. 2. A washer nozzle for injecting a liquid toward a portion to be cleaned, comprising: an ejection port from which the liquid is ejected; and a flow passage for guiding the liquid to the ejection port. A pipe portion having a predetermined inner diameter, and a constriction portion connected to the pipe portion and having an inner diameter gradually reduced toward the injection port, wherein a central axis Q ′ of the constriction portion is a central axis of the pipe portion. P '
A washer nozzle characterized by being inclined with respect to. 3. A washer nozzle for injecting a liquid toward a part to be cleaned, an ejection port from which the liquid is ejected, a flow path for guiding the liquid to the injection port, and a rectification provided in the flow path. The flow passage has a pipe portion having a predetermined inner diameter, and a constriction portion which is connected to the pipe portion and has an inner diameter gradually narrowing toward the injection port. The washer nozzle is disposed at a position shifted by a predetermined distance from a center axis P ″ of the pipe portion. 4. The washer nozzle according to claim 1, wherein an outside of the flow passage is connected to the ejection port and restricts the spread of the liquid ejected from the ejection port. A washer nozzle having a regulating portion. 5. The washer nozzle according to claim 1, further comprising: a jet and a nozzle body that movably holds the jet, wherein the jet and the flow passage are provided in the jet. A washer nozzle characterized by being formed.