KR20230168294A - Ventilation device for urea tank of vehicle - Google Patents

Abstract

The present invention relates to a urea water tank connected to a urea water injection pipe and formed to accommodate therein the urea water injected through a urea water injection gun, mounted on the urea water injection pipe, and blowing the air inside the urea water tank into the urea water tank. A main body connected to a leveling pipe for discharging to the outside of the urea tank and installed on the main body, provide an additional ventilation path along with the ventilation path formed at the inlet of the main body, so that the internal air accumulated in the main body is discharged. It includes an air discharge guide that is formed.

Description

Ventilation device for urea tank of vehicle {VENTILATION DEVICE FOR UREA TANK OF VEHICLE}

The present invention relates to an aeration device for a urea water tank in a vehicle, and more specifically, to an aeration device for a urea water tank in a vehicle that can prevent the problem of urea water overflowing through the inlet of the injection pipe when injecting urea water. will be.

Generally, in the case of vehicles equipped with a diesel engine, a urea water tank is installed to store urea water used to purify nitrogen oxides contained in engine exhaust gas.

This urea solution is replenished in the urea solution tank using a urea solution injection gun or using a commercially available urea solution container.

At this time, when using the urea water injection gun, when the urea water injection gun is inserted into the injection pipe inlet of the urea water tank, the urea water injection gun operates and automatically ejects urea water. Afterwards, when the urea water tank is fully filled with urea water, The operation of the urea water injection gun is automatically stopped by the injection stop device provided in the urea water injection gun, and the urea water injection is stopped.

If a urea water tank is used to replenish urea water, the user inserts the nozzle of the urea water tank into the inlet of the urea water tank's injection pipe to inject the urea water contained in the urea water tank into the urea water tank. In this case, since the user cannot determine the full state of the urea water tank, the user estimates the full state of the urea water tank through his senses and stops injecting urea water.

Meanwhile, even when using a urea water injection gun, if the urea water pushed out as the urea tank is fully filled with urea water blocks the injection stop device including the sensing hole, the operation of the urea water injection gun is stopped. The ventilation area of the injection pipe is small compared to the pressure generated during water injection, and the ventilation area alone is not enough to completely relieve the pressure. Therefore, even after the operation of the urea water injection gun is stopped, the pressure rises and the urea water overflows through the injection pipe.

Therefore, after the urea water tank is fully filled with urea water, it is important to prevent the urea water from flowing back and overflowing into the injection pipe inlet of the urea water tank.

The purpose of the present invention is to install an additional ventilation path in addition to the ventilation path formed between the urea water injection gun and the injection pipe, and to add ventilation by selectively opening the additional ventilation path as the urea water injection gun is inserted into the injection pipe. By ensuring that the pressure generated inside the urea tank and urea water pipe when injecting urea water is lowered, it is possible to prevent the problem of urea water overflowing through the injection pipe even after the operation of the urea water injection gun is stopped. The purpose is to provide a ventilation device for a water tank.

The ventilation device for the urea water tank of a vehicle according to the present invention is connected to a urea water injection pipe, a urea water tank formed to accommodate therein the urea water injected through a urea water injection gun, and is mounted on the urea water injection pipe. , a main body connected to a leveling pipe for discharging the air inside the urea water tank to the outside of the urea water tank and installed on the main body, providing an additional ventilation path along with a ventilation path formed at the inlet of the main body, It is characterized in that it includes an air discharge guide formed to discharge internal air accumulated in the main body.

Here, the air discharge guide allows the additional ventilation path to be selectively provided as the urea solution injection gun is inserted into the main body.

In addition, the air discharge guide shields the discharge hole formed in the main body to provide the additional ventilation path, and the rotator is rotatable by a rotation shaft coupled to the inside of the discharge hole, and the rotation position of the rotator is set to the initial position. It is provided with a weight body formed to return to.

In addition, the air discharge guide is fixedly mounted on the rotator and further includes a stopper formed to be fixed inside the discharge hole when the air discharge guide returns to its initial position with respect to the rotator.

Meanwhile, the rotator extends from the inside of the discharge hole toward the urea water injection pipe, has a body portion formed to be pressurized by the inserted urea water injection gun, and protrudes from the body portion to shield the discharge hole. It is formed so as to have a shape corresponding to the shape of the discharge hole, and includes a shielding portion provided to guide the installation of the weight body.

The shielding part is positioned to protrude to the outside of the discharge hole, and as the body portion disposed at an inclination inside the main body is pressed, one side to which the weight body is coupled rotates about the rotation axis so that a part of the discharge hole make it open

Additionally, the weight body is coupled to one bent side of the body portion to be disposed in a horizontal direction at the initial position of the rotator, which is inclinedly disposed inside the discharge hole.

Meanwhile, the ventilation path is formed between the inner diameter of the inlet portion and the outer diameter of the urea water injection gun when the urea water injection gun is inserted into the main body.

In the present invention, in addition to the ventilation path formed between the urea water injection gun and the injection pipe, an additional ventilation path is installed, and as the urea water injection gun is inserted into the injection pipe, the additional ventilation path is selectively opened to ensure additional ventilation. By doing so, the pressure generated inside the urea water tank and the urea water pipe when injecting urea water is lowered, which has the effect of preventing the problem of urea water overflowing through the injection pipe even after the operation of the urea water injection gun is stopped.

Accordingly, the present invention can improve marketability for vehicles that require replenishment of urea water by preventing overflow of urea water, and can increase customer convenience by eliminating the need for separate washing due to overflow of urea water. It has an effect.

1 is a diagram showing the configuration of a ventilation device for a urea tank of a vehicle according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1 to show a ventilation path for a ventilation device for a urea tank of a vehicle according to an embodiment of the present invention.
Figure 3 is a diagram showing an additional ventilation path for the ventilation device for the urea tank of a vehicle according to an embodiment of the present invention.
Figure 4 is a diagram showing the main body of the ventilation device for the urea tank of a vehicle according to an embodiment of the present invention.
Figure 5 is a diagram showing an air discharge guide for a ventilation device for a urea tank of a vehicle according to an embodiment of the present invention.
Figures 6 and 7 are diagrams showing the initial position of the rotator with respect to the ventilation device for the urea tank of the vehicle according to an embodiment of the present invention.
Figures 8 and 9 are diagrams showing the rotational position of the rotator when injecting urea water into the aeration device for the urea water tank of a vehicle according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

The advantages and features of the present invention and how to achieve it will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms. These embodiments only serve to ensure that the disclosure of the present invention is complete and are within the scope of common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

Additionally, in describing the present invention, if it is determined that related known techniques may obscure the gist of the present invention, detailed description thereof will be omitted.

Figure 1 is a diagram showing the configuration of a ventilation device for a urea water tank of a vehicle according to an embodiment of the present invention, and Figure 2 is a ventilation path for a ventilation device for a urea water tank of a vehicle according to an embodiment of the present invention. This is a cross-sectional view taken along line A-A' in Figure 1 to show.

And, Figure 3 is a diagram showing an additional ventilation path for the aeration device for the urea water tank of a vehicle according to an embodiment of the present invention, and Figure 4 is a diagram showing an aeration device for the urea tank of a vehicle according to an embodiment of the present invention. It is a drawing showing the main body, and Figure 5 is a drawing showing an air discharge guide for the ventilation device for the urea tank of a vehicle according to an embodiment of the present invention.

In addition, Figures 6 and 7 are diagrams showing the initial position of the rotator with respect to the ventilation device for the urea tank of the vehicle according to the embodiment of the present invention, and Figures 8 and 9 are diagrams showing the initial position of the rotator according to the embodiment of the present invention This is a drawing showing the rotational position of the rotator when injecting urea water into the aeration device for the urea water tank.

As shown in FIG. 1, the ventilation device for the urea water tank of a vehicle according to this embodiment includes a urea water tank 100, a main body 200, and an air discharge guide 300.

The urea solution tank 100 is mounted on a vehicle to store urea solution used when purifying nitrogen oxides contained in exhaust gas of a diesel engine.

The urea water tank 100 is connected to a urea water injection pipe 110 for injecting urea water, and in order to inject urea water into the urea water injection pipe 110 through the urea water injection gun 10, the internal A leveling pipe 120 for discharging air to the outside, that is, to the atmosphere, may be connected.

Here, the lower part of the urea solution injection pipe 110 may be disposed in communication with the upper part of the urea solution tank 100, and the upper part may be connected to the main body 200 provided to communicate with the atmosphere outside the vehicle.

The main body 200 is mounted on the urea water injection pipe 110 and connected to the leveling pipe 120, and when urea water is injected, a ventilation path (A) is provided at the inlet portion 210, Through this, the air inside the urea tank 100 is discharged into the atmosphere.

That is, after inserting the urea water injection gun 10 into the urea water injection pipe 110 to start injection of urea water, when the urea water tank 100 is fully injected, the urea water tank 100 contains The leveling pipe 120 is blocked by the urea water, which increases the internal pressure of the urea water tank 100, and accordingly, the urea water is supplied to the main body through the urea water injection pipe 110 and the leveling pipe 120. It is pushed out to the (200) side.

As described above, when the urea water is pushed out and blocks the sensor hole (not shown) of the urea water injection gun 10, the urea water injection is stopped. However, at this time, the urea water injection gun (10) is stopped due to the accumulated internal pressure. ), a problem occurs in which the number of elements overflows to the outside of the main body 200 even after the interruption.

In other words, when the urea water injection gun 10 is inserted into the inlet 210 for urea water injection, as shown in FIG. 2, the inner diameter of the inlet 210 and the urea water injection gun 10 A ventilation path (A) is formed between the outer diameter of the urea solution. Since the ventilation path (A) alone with a limited ventilation area is insufficient to relieve the internal pressure accumulated as the urea solution is fully injected, the urea solution injection gun (10) Even after the operation for urea water injection is stopped, the urea water overflows to the outside of the main body 200 due to internal pressure.

In this way, when the urea water flows to the outside of the main body 200, the urea water flows down the painted surface or tires of the vehicle, and eventually crystallizes into white, which requires separate cleaning. Therefore, problems arise in terms of marketability of the vehicle and customer convenience.

To this end, as shown in FIGS. 3 to 5, the air discharge guide 300 is installed in the main body 200, and together with the ventilation path (A) formed in the inlet portion 210, an additional ventilation path (B) It is formed so that the accumulated internal air can be discharged to the outside.

This air discharge guide 300 includes a rotator 310 and a weight body 320.

First, the rotator 310 shields the discharge hole (H) formed in the main body 200 to provide an additional ventilation path (B) (see FIG. 4), and the rotation shaft 310a coupled to the inside of the discharge hole (H) ) is provided to be rotatable.

Here, the rotator 310 includes a body portion 312 and a shield portion 314.

The body portion 312 extends with a predetermined length from the inside of the discharge hole (H) toward the urea solution injection pipe 110, and as pressurization is performed by the inserted urea solution injection gun 10, the rotation axis It is formed to rotate based on (310a).

Additionally, the shielding portion 314 protrudes from the body portion 312 and is formed to shield the discharge hole (H).

More specifically, the shielding portion 314 is positioned to protrude to the outside of the discharge hole (H), and the body portion 312 is disposed with an inclination toward the inlet portion 210 from the inside of the main body 200. As pressurized by the urea water injection gun 10, the weight body 320 rotates along the rotation axis 310a in the coupled state, so that the discharge hole (H) is formed to provide an additional ventilation path (B). Make some parts open.

In addition, the shield 314 has a shape corresponding to the shape of the discharge hole (H) and is provided to guide the installation of the weight body 320.

More preferably, the weight body 320 is disposed in the horizontal direction with respect to the upper surface of the main body 200 at the initial position of the rotator 310 disposed to be inclined inside the discharge hole (H). It is coupled to the bent one side (312a) of.

That is, the weight body 320 is formed to return the rotational position of the rotator 310 to the initial position, and the body portion 312 has an inclination toward the inlet portion 210 from the inside of the discharge hole (H). Because it is disposed, if it is mounted on the shield 314 at the same inclination as the body 312, the discharge hole H may be partially opened due to the mounting position of the weight 320 even in the initial position. Therefore, it is preferable to be coupled to the bent one side portion 312a of the body portion 312 so that it is disposed in the horizontal direction in the initial position.

The air discharge guide 300 may further include a stopper 330 along with the rotator 310 and the weight body 320. This stopper 330 is fixedly mounted on the rotator 310 through an adhesive or the like (Figure 5).

This stopper 330 is formed to be fixed inside the discharge hole (H) when returning to the initial position with respect to the rotator 310, which means that there is a gap between the discharge hole (H) and the shield 314. Since this may occur, a stopper 330 having a predetermined thickness is mounted to surround the outer circumference of the shield 314, so that the shield 314 is fitted into the discharge hole (H) when returning to the initial position. This is to ensure fixation and at the same time prevent foreign substances from flowing into the interior through the discharge hole (H) at the initial position.

Based on this configuration, with reference to FIGS. 6 to 9, the operation and resulting structure of the air discharge guide during normal operation and when urea water is injected will be described as follows.

normally

As shown in FIG. 6, the rotator 310 is arranged to have a predetermined inclination toward the inlet 210 into which the urea solution injection gun 10 is inserted.

In this state, the initial position of the rotator 310 can be fixed by the weight 320, as shown in FIG. 7, and the rotator 310 is fitted into the interior of the discharge hole (H) by the stopper 330. , the discharge hole (H) can be sealed.

When injecting urea water

As shown in FIG. 8, when the urea solution injection gun 10 is inserted into the inlet 210, the rotator 310 rotates around the rotation axis 310a by the urea solution injection gun 10, A portion of the discharge hole (H) is opened.

In other words, when pressure is applied to the rotator 310 by inserting the urea solution injection gun 10, the body portion 312 rotates around the rotation axis 310a, and accordingly the shielding portion ( As 314) rotates, one side 312a is lifted and part of the discharge hole H is opened.

Here, since the urea water injection gun 10 is maintained in the inserted state when urea water is injected, the open state of the discharge hole (H) as described above is maintained until the urea water is fully filled, so the urea water injection gun 10 is maintained in the inserted state. During water injection, the additional ventilation path (B) is always open.

Therefore, when injecting urea water, as shown in FIG. 9, a plurality of ventilation paths can be secured by opening the ventilation path (A) and the additional ventilation path (B).

More specifically, a ventilation path (A) is usually formed between the inner diameter of the inlet portion 210 and the outer diameter of the urea water injection gun 10 due to the difference in outer diameter (see FIG. 2), and this limited ventilation area is formed. Since it is difficult to relieve the internal pressure accumulated as the urea solution is fully injected with only the ventilation path (A), a plurality of ventilation paths (A, B) are provided by opening the additional ventilation path (B) by the air discharge guide 300. ) is secured, so that the accumulated internal pressure can be effectively relieved, and accordingly, even after the urea water injection gun 10 is stopped, the urea water overflows to the outside of the main body 200 through the inlet 210. Problems can be prevented.

Afterwards, when the urea water is fully filled and the urea water injection is stopped, that is, when the inserted urea water injection gun 10 is released, the rotator 310 is moved to the discharge hole (H) by the weight 320. It returns to the initial position for blocking, and the stopper 330 seals the discharge hole (H), preventing foreign substances from flowing inside through the discharge hole (H) at the initial position. there is.

In the present invention, in addition to the ventilation path formed between the urea water injection gun and the injection pipe, an additional ventilation path is installed, and as the urea water injection gun is inserted into the injection pipe, the additional ventilation path is selectively opened to ensure additional ventilation. By doing so, the pressure generated inside the urea water tank and the urea water pipe when injecting urea water is lowered, which has the effect of preventing the problem of urea water overflowing through the injection pipe even after the operation of the urea water injection gun is stopped.

Accordingly, the present invention can improve marketability for vehicles that require replenishment of urea water by preventing overflow of urea water, and can increase customer convenience by eliminating the need for separate washing due to overflow of urea water. It has an effect.

The present invention has been described above with reference to the embodiment(s) shown in the drawings, but this is merely illustrative, and various modifications may be made by those skilled in the art. It will be understood that all or part of (s) may be optionally combined. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached claims.

10: Urea water injection gun 100: Urea water tank
110: Urea water injection pipe 120: Leveling pipe
200: main body 210: entrance part
300: Air discharge guide 310: Rotator
310a: rotation axis 312: body portion
312a: one side 314: shielding part
320: weight body 330: stopper
A: Ventilation path B: Additional ventilation path
H: discharge hole

Claims (8)

A urea water tank to which a urea water injection pipe is connected and formed to accommodate therein the urea water injected through the urea water injection gun;
A main body mounted on the urea water injection pipe and connected to a leveling pipe for discharging the air inside the urea water tank to the outside of the urea water tank; and
An air discharge guide installed on the main body and provided with an additional ventilation path along with the ventilation path formed at the inlet of the main body to discharge internal air accumulated in the main body. An element of a vehicle comprising a. Aeration device for water tank
According to claim 1,
The air discharge guide is,
A ventilation device for a urea water tank of a vehicle, wherein the additional ventilation path is selectively provided as the urea water injection gun is inserted into the main body.
According to claim 1,
The air discharge guide is,
a rotator that shields the discharge hole formed in the main body to provide the additional ventilation path and is rotatable by a rotation shaft coupled to the inside of the discharge hole; and
A ventilation device for a urea tank of a vehicle, comprising: a weight formed to return the rotational position of the rotator to its initial position.
According to claim 3,
The air discharge guide is,
A stopper is fixedly mounted on the rotator and is formed to be fixed inside the discharge hole when the rotator returns to its initial position.
According to claim 3,
The rotator is,
A body portion extending from the inside of the discharge hole toward the urea water injection pipe and formed to be pressurized by the inserted urea water injection gun; and
a shielding portion that protrudes from the body portion, is formed to shield the discharge hole, has a shape corresponding to the shape of the discharge hole, and is provided to guide the installation of the weight body; Aeration device for urea tank.
According to claim 5,
The shielding part,
As the body part, which is positioned to protrude to the outside of the discharge hole and is inclinedly disposed inside the main body, is pressed, one side to which the weight body is coupled rotates about the rotation axis to open a portion of the discharge hole. Ventilation device for the urea tank of a vehicle characterized by:
According to claim 5,
The weight body is,
A ventilation device for a urea tank of a vehicle, characterized in that it is coupled to a bent one side of the body portion so as to be disposed in a horizontal direction at the initial position of the rotator disposed to be inclined inside the discharge hole.
According to claim 1,
The ventilation path is,
A ventilation device for a urea water tank of a vehicle, characterized in that formed between the inner diameter of the inlet portion and the outer diameter of the urea water injection gun in a state in which the urea water injection gun is inserted into the main body.

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