JPS5851649Y2 - Vehicle screen washer tank - Google Patents

Description

[Detailed description of the invention] Wipers are widely used in vehicles, such as automobiles, especially to wipe the windshield (windscreen). In order to prevent this, it is also well known to use a device that sprays cleaning liquid or the like onto the windscreen.

The present invention relates to an improvement of a tank for storing and accommodating this cleaning liquid, that is, a screen washer tank.

The screen washer tank is located away from the driver's seat of the vehicle, and in order to reduce costs, it does not have a liquid level gauge or button, so it can be refilled when the liquid stops gushing out. It was normal.

SUMMARY OF THE INVENTION An object of the present invention is to provide a screen washer tank for a vehicle that is equipped with a device to notify the driver of a decrease in fluid level.

According to the present invention, a sub-tank having a large opening at the top and a small opening at the bottom is provided inside the sub-tank, the intake pipe of the screen washer pump is opened into the sub-tank, and the small opening of the sub-tank is connected to the sub-tank during normal operation of the screen washer pump. A screen washer tank for vehicles with a small opening compared to the amount of water intake, a large opening in the sub-tank compared to the amount of water intake, and a screen washer pump that can detect when the liquid level drops below the large opening due to operation of the screen washer pump. is provided.

If the liquid level in the main tank falls below the top opening of the sub-tank, the liquid in the sub-tank will be supplied only from the bottom opening, resulting in insufficient liquid supply when the pump is activated, and alerting the driver of the drop in liquid level. be able to.

However, even after such a state has been reached, the liquid can be supplied into the sub-tank again by stopping the operation of the pump for a short period of time, so that spouting can be performed by operating the pump intermittently.

Embodiments of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a screen washer tank body according to the present invention, which has a liquid injection cap 2 on its upper part, and a screen washer pump 3 and a pump motor 4 on its side wall.

The liquid sent out by the operation of the pump 3 passes through the liquid sending pipe 6 and is sprayed onto the windscreen via a nozzle (not shown).

According to the present invention, a sub-tank 7 is provided inside the main body 1.

In the illustrated embodiment, the sub-tank 7 is shaped like a small pot and is fixed to the internal bottom surface of the main body 1 in an upright position with the opening 8 facing upward, but it can be arranged in any suitable manner, for example, on a partition wall. The small chamber may be limited to the inside of the main body 1.

A small opening 9 is provided in the lower part of the sub-tank 7, and an intake pipe 10 of the pump 3 opens into the sub-tank 7.

When the liquid level 12 in the tank is at the position shown in FIG. 2, that is, higher than the upper opening 8 of the sub-tank, when the pump 3 is activated, the liquid is freely supplied into the sub-tank through the opening 8, so that continuous ejection can be performed without any problem. be exposed.

As shown in FIG. 3, when the liquid level 12 falls below the upper opening 8, the liquid in the sub-tank 7 communicates with the main tank portion only through the lower opening 9.

When the pump 3 is operated at this time, after a certain period of time determined by the size of the lower opening 9, the capacity of the sub-tank 7, and the discharge amount of the pump 3, the liquid level in the sub-tank becomes higher than the opening of the intake pipe 10, as shown in FIG. The liquid will no longer gush out.

The driver can easily know that the liquid level in the tank has decreased.

After a while after the operation of the pump is stopped, the liquid entering from the lower opening 9 causes the liquid level in the sub-tank to rise as shown in FIG. 5, and the injection can be started again.

Therefore, even after the driver senses that replenishment of fluid is required, he can still perform intermittent injection operations until reaching the appropriate replenishment location.

As described above, according to the present invention, a drop in the liquid level in the screen washer tank can be detected before the injection function is completely lost by using an extremely simple configuration.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tank according to the present invention, and FIG. 2 is a longitudinal sectional view. 3 to 5 are longitudinal cross-sectional views similar to FIG. 2 showing operating states. DESCRIPTION OF SYMBOLS 1... Tank body, 3... Screen washer pump, 10... Pump intake pipe, 7... Sub-tank, 8... Upper opening, 9... Lower opening.

Claims (1)

[Scope of utility model registration request] A sub-tank having a large opening at the top and a small opening at the bottom is provided inside, the intake pipe of the screen washer pump is opened into the sub-tank, and the small opening of the sub-tank is compared with the amount of water intake during normal operation of the screen washer pump. A screen washer tank for a vehicle, in which the large opening of the sub-tank is set to be small in comparison with the water intake amount, and it is possible to detect when the liquid level drops below the large opening due to the operation of the screen washer pump.