JPS6237951Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cyclone type precleaner used in an air cleaner for an internal combustion engine.

In order to reduce clogging of air cleaners used in internal combustion engines and extend their service life, cyclone-type precleaners are used to separate and capture coarse dust in intake air in advance. This one has a dust case placed above the louver assembly which has many louver fins around the inner cylinder.
Furthermore, a cover is fixed above the louver fin, which swirls the intake air of the engine to centrifugally separate and capture coarse dust in the intake air. In order to prevent water that has reached the lower end of the outer cylinder of the louver assembly from being sucked into the cyclone-type precleaner from the louver fin during rainy weather, etc., the space below the louver fin of the cyclone-type precleaner is designed so that the upper end is on the outer circumference of the louver fin and the lower end is on the outer circumference of the louver fin. It is fixed to the inner cylinder and is further covered with a cover having an outwardly downwardly inclined annular body on the outer periphery of the upper end, and an intake chamber is formed within this cover, and an external air intake is provided at a position below the lower end of the inclined annular body of the cover. It is known that the entrance is opened (see Utility Model Application No. 55-96033 (Utility Model Application No. 57-18753) specification), and furthermore, the louver assembly has a louver that extends outward and downward on the outer periphery and has a lower end. A cyclone-type precleaner has been proposed that includes an inclined annular body located below an outside air intake port formed between an inner cylinder and an outer cylinder of the assembly. However, although these products are effective in preventing the inhalation of water, they are less effective in preventing the inhalation of snow, which is lighter than water, and is sucked in through the outside air intake, causing the louver fins that give swirling force to the intake air to Snow powder accumulates and freezes, which obstructs the flow of intake air and increases ventilation resistance.
Furthermore, as the atmospheric temperature rises, snow powder and frozen ice adhering to the louver fins melt and are sucked into the cyclone-type precleaner and enter the engine via the air cleaner, causing engine failure.

The present invention improves the above-mentioned points, and in order to prevent snow and rain from being sucked into the cyclone-type precleaner and from accumulating snow on the louver fins, the present invention extends outward and downward around the outer periphery of the louver assembly.
A sloping annular body whose lower end is located below the outside air intake port of the louver assembly is provided, and a porous annular member made of metal steel or a perforated plate is further provided at the lower end.

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

In the figure, a louver assembly 1 includes a large number of louver fins 4 having a predetermined inclination angle and provided at predetermined intervals between an inner cylinder 2 and an outer cylinder 3.
An outside air intake port 15 is formed between the outer cylinder 3 and the outer cylinder 3. Further, the inner cylinder 2 of the louver assembly has a bridge 5 inside the upper part, and a center bolt 6 is disposed upward from the center of the bridge 5.
A flange 7 is provided on the outer peripheral surface. An inclined annular body 8 extending outward and downward from the outer periphery of the flange 7 is provided. The lower end of the inclined annular body 8 is located below the outside air intake port 15 formed between the inner cylinder 2 and the outer cylinder 3. Furthermore, a porous annular body 9 made of gold steel or a perforated plate is provided at its lower end. A dust case 11 having a dust reservoir 10 on the outer periphery is disposed on the flange 7 of the louver assembly 1.
Furthermore, a cover 12 is fixed to the center bolt 6 of the louver assembly 1 with a nut 13 through a bolt hole formed in the center thereof above the dust case 11. Such a cyclone-type precleaner is connected to the inlet pipe of the air cleaner. Incidentally, the inclined annular body 8 may be provided at the lower end of the outer cylinder 3 of the louver assembly 1, or a flange portion may be provided at the inner peripheral portion of the upper end of the inclined annular body 8, and this flange portion may be connected to the flange 7 of the louver assembly 1 and the dust case. 11 and the lower end thereof.

In such a cyclone type precleaner, dust-containing air is turned into a swirling flow by the louver fins 4 of the louver assembly 1 and enters the dust case 11 due to suction from the engine, and coarse dust is centrifuged and captured in the dust reservoir 10. Air containing fine dust passes through the inner cylinder 2 and is sucked into the air cleaner. In rainy weather or when the car is washed, water dripping from the upper part of the cover 12 descends along the outer surface of the dust case 11 and reaches the inclined annular body 8. Thereafter, the water is guided by the inclined surface of the inclined annular body 8 to a position outside and below the outside air intake port 15 of the louver assembly 1, and is transmitted to the porous annular body 9 at the lower end of the inclined annular body 8. Fall from the bottom of 9. Further, during snowfall, when snow powder passes through the holes of the porous annular body 9 together with the intake air, it comes into contact with the inner peripheral portion of the hole of the porous annular body 9 which is cooled by the atmosphere, and is deposited thereon. Even if the snow powder or frozen ice trapped in the porous annular body 9 melts as the atmospheric temperature rises, the melted water will fall downward without being sucked in because the wind speed of the intake air in this part is slow.

As described above, according to the cyclone type precleaner of the present invention, the sloping annular body extending outward and downward from the outside air intake of the louver assembly is provided, so that rainwater and water from car washing can be absorbed into the louver assembly. Water can be guided to a remote location outside and below the outside air intake, that is, a location where the suction force of the intake air is less affected, and therefore water can be prevented from being sucked into the cyclone-type precleaner. can. In addition, since the porous annular body is provided at the lower end of the slanted annular body, snow powder is sucked through the holes of the porous annular body during snowfall, but the porous annular body is placed outward and downward from the outside air introduction hole of the louver assembly. Since the suction force of the intake air is extremely slow, it adheres and deposits on the cooled perforated plate. Therefore, snow powder does not reach the louver fin and accumulate on the louver fin, thereby preventing an increase in ventilation resistance. Furthermore, even if snow accumulates on the porous annular body, the lower surface of the porous annular body is largely open, so the ventilation resistance will not increase.

[Brief explanation of the drawing]

The figure shows a partial sectional view of an embodiment of the invention. 1... Louver assembly, 2... Inner cylinder, 3...
Outer cylinder, 4... Louver fin, 8... Inclined annular body,
9...Porous annular body, 10...Dust reservoir, 11...
Dust case, 12...cover.

Claims (1)

[Scope of utility model registration request] A dust case having a dust reservoir is disposed above a louver assembly including a large number of louver fins between an inner cylinder and an outer cylinder, a cover is fixed above the louver assembly, and a cover is fixed to the outer periphery of the louver assembly so as to face outward and downward. The cyclone type is provided with a sloping annular body that extends to the louver assembly and whose lower end is located below the outside air intake port formed between the inner cylinder and the outer cylinder of the louver assembly, and further provided with a porous annular body at the lower end of the slanted annular body. Precleaner.