KR950008321Y1 - Drain valve for air cleaner - Google Patents

Abstract

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Description

Drain valve of air cleaner for commercial vehicle

1 is a state in which the air cleaner to which the present invention is applied is applied to a commercial vehicle.

2 is a cross-sectional view of the air cleaner to which the present invention is applied.

Figure 3a, Figure 3b is an enlarged cross-sectional view showing the operating state of the main part of the present invention.

4 is a cross-sectional view corresponding to FIG. 2 as a conventional structural diagram.

* Explanation of symbols for main parts of the drawings

1: air cleaner 2: commercial vehicle

3: drain valve 4: filter element

5: air inlet 6: air outlet

7: lower case 8: bottom

9: float case 10: float

10a: insertion protrusion 11: discharge drain hole

The present invention relates to an air cleaner mounted on a vehicle or a volume of a commercial vehicle, and particularly to a drain valve of an air cleaner that prevents water from penetrating the air cleaner from outside and discharges the water that has penetrated the inside. It is about.

As is well known, the main function of a vehicle air cleaner (also called an air purifier) is to prevent the aging of engine performance by reducing wear of the engine sliding part by filtering foreign substances in the air and supplying purified air to the engine. Other additional functions include controlling the temperature of intake air, supplying secondary air, acting as a blow-by gas reducing device, preventing fuel evaporation, and preventing drainage and water intrusion. It has several functions related to engine performance as well as the original air filtration function.

Here, the role of draining and preventing water infiltration of the air cleaner is as shown in FIG. 1, and the body of the air cleaner (1,101) is relatively attached to the vehicle body so that the air cleaner (1,101) during the rainy season driving process, such as rainy season In addition to being able to operate in a state where the water is locked up to the position of, external water, such as rainwater, has often been infiltrated into the air cleaner 1, 101.

Due to such a problem, the conventional air cleaner 101 applied to a commercial vehicle makes an unload valve 112 at the lower portion of the air cleaner 101 as shown in FIG. The water that has been blocked and penetrated into the inside is installed to be discharged by the engine back pressure when driving, but the function of the unloed valve 112 is insufficient, that is, due to the lack of sealing and the deterioration of the discharged water, the function cannot be properly performed. Not only the starting is turned off while driving, but water is infiltrated into the engine oil, which adversely affects the engine sliding part. Furthermore, there is a problem that excessive white smoke is generated during driving due to incomplete combustion.

Therefore, the present invention was devised to solve the conventional problems as described above, and prevents water from entering the air cleaner while the engine stops while the water inside the air cleaner naturally drains out and cleansed at all times. It is an object of the present invention to provide a drain valve of an improved commercial vehicle air cleaner that supplies only air to the engine, thereby improving engine performance.

In order to achieve the above object, the present invention provides a commercial vehicle energy cleaner having an element that is a filtration filter and having an intake pipe and an exhaust pipe, wherein water intrusion prevention function and discharge function are provided at the bottom of the lower case of the air cleaner. And a drain valve, which is installed inside the float case welded to the bottom of the lower case so that the insertion protrusion is freely inserted into and drained out of the drain drain hole of the bottom by the buoyancy of the water and the engine suction pressure. It consists of a float for opening and closing the hole, wherein the float is characterized in that it is made smaller than the specific gravity of the water.

Hereinafter, the present invention will be described in detail based on the accompanying drawings.

1 is a state diagram showing a state in which an air cleaner 1 to which the present invention is applied is installed in a commercial vehicle 2, and FIG. 2 is a cross-sectional view of the air cleaner 1 to which the present invention is applied, and FIGS. 3a and 3b are present inventions. Are enlarged cross-sectional views showing the operating state of the drain valve (3).

As shown in the drawing, the filter element 4 is provided with an air inlet 5 for inducing and guiding the outside air and an air outlet 6 for supplying cleanly purified air to an engine not shown in the drawing. In the commercial vehicle air cleaner (1), a function of preventing the ingress of water into the bottom portion (8) of the lower case (7) of the air cleaner (1) and the water invaded inside the air cleaner (1) out A drain valve 3 having a function of discharging is mounted, and the drain valve 3 has an insertion protrusion of the float 10 embedded in the float case 9 welded to the bottom case 8 of the lower case 7. 10a opens and closes the drain drain hole 11 of the bottom part 8 freely by the buoyancy of the water and the engine back pressure.

Here, the float 10 has a specific gravity of about 0.9, which is smaller than the specific gravity of water in order to open and close the discharge drain hole 11 smoothly.

Looking at the action of the air cleaner drain valve according to the present invention having such a structure, as shown in FIG. 3a, the drain valve provided in the bottom portion 8 of the air cleaner 1 in the engine stop state when the engine is stopped ( The float 1 of 3) is submerged by the water penetrated into the air cleaner 1 (i.e., because the float 10 is smaller than the specific gravity of the water) and the water naturally drains out the drain hole 11 In addition to being discharged to the outside in the direction of the arrow, the float 10 opens the discharge drain hole 11 by the back pressure generated by the engine during engine operation, so that the particles caught in the filter element The same foreign matter and water are discharged out through this open drain hole 11.

On the other hand, as shown in FIG. 3B, when water enters from the outside, that is, water enters into the inside of the air cleaner 1 through the bottom part 8 of the lower case 7 of the air cleaner 1. When the insertion protrusion 10a of the float 10 having a specific gravity smaller than water closes the discharge drain hole 11 due to the buoyancy of the water, foreign matter from the water or the outside is prevented.

As described above, the present invention not only blocks water invading from the outside by a drain valve having a float in the air cleaner of a commercial vehicle, but also quickly discharges the water invaded therein, thereby ultimately improving engine performance. do.

Claims (2)

An air cleaner for a commercial vehicle comprising a filter element (4) internally and having an air inlet (5) for guiding suction of external air and an air outlet (6) for supplying clean air to the engine. The bottom case 8 of the lower case 7 of (1) is equipped with a drain valve 3 having a function of preventing the ingress of water and a function of discharging the water penetrated into the interior of the air cleaner 1, The drain valve 3 has an insertion protrusion 10a of the float 10 embedded in the float case 9 welded to the bottom case 8 of the bottom case 7 by the buoyancy of the water and the engine back pressure. An air cleaner drain valve for a commercial vehicle, characterized by freely opening and closing the drain drain hole (11) of the section (8). The drain valve of claim 1, wherein the float (10) has a specific gravity less than that of water, specifically about 0.9 specific gravity of water.