JPH07172162A - Filter device - Google Patents

Abstract

PURPOSE:To elongate a dust collecting durability time by dividing the inside of a ventilating duct by an intermediate wall inclined so as to cross the flow axis of the ventilating duct to form the respective divided paths, and disposing dust collecting filters on the respective wide diameter sides of the divided paths. CONSTITUTION:An intermediate wall 13 crossing the axis 12 of a ventilating duct 11 is disposed in the path of the ventilating duct 11. The bore of the ventilating path is formed into a divided path 14 gradually lessening the bore in the flow direction of air and a divided path 15 gradually enlarged the bore of the ventilating path respectively. Integrally structured dust collecting filters 16, 17 are juxtaposed on the wider diameter sides of both divided paths 14, 15, so that time of dust collecting durability can be elongated by the respective dust collecting filters 16, 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device used for an air cleaner for a vehicle, which is installed in a front portion of a passenger compartment of an automobile.

[0002]

2. Description of the Related Art An outside air intake is provided on a cowl top of an automobile, and the outside air taken in through the outside air intake passes through a filter unit installed inside the instrument,
A conventional automobile air purifier having a structure for discharging purified air into the passenger compartment has a structure as shown in FIG. Hereinafter, a schematic structure of a conventional automobile air cleaner will be described.

That is, 1 is an air box provided on the back side of the cowl top 2, and the cowl top 2 is provided with an outside air inlet 3 for taking in outside air into the air box 1. An intake case 4 is provided in the air box 1, and a blower fan 5 is installed in the intake case 4. Further, in the air box 1, a dust collecting filter 6 is arranged between the outside air intake 3 and the intake case 4.

[0004]

However, in the dust collecting filter 6 in the air purifier having such a structure, the dust collecting filter 6 is provided in order to prolong the durability time of the filter, that is, the filter life due to clogging by dust. The filter paper 7 is formed in a pleat shape, and the number of peaks of the pleat is further increased, or the height of the pleat is increased to increase the ventilation area of the filter paper. However, there is a limit, and it is difficult to greatly improve the durability time with one dust collecting filter.

Therefore, in order to prolong the durability of the dust collecting filter, for example, as shown in FIG. 2, two dust collecting filters 6 and 6 are arranged in series in the air flow direction in the air box 1. Although a filter device having a structure in which the dust collecting filters 6 and 6 share the dust collecting ability has been previously proposed, in the filter device having this structure, the ventilation pressure loss when passing through the air box 1 is reduced. Since there is a sum of both dust collecting filters, there is a problem that the driving efficiency of the blower fan 5 and the like decreases, and the driving noise of the blower fan 5 increases.

[0006]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the problems in the prior art, and the air passage of the air box is divided by an intermediate wall inclined with respect to the axial direction of the air passage. Filters that form divided passages, and dust collection filters are arranged on the wide diameter side of each of these divided passages, and the dust collection filters collect dust in parallel to greatly improve the dust collection durability time. To provide a device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the drawings.

In FIG. 3, reference numeral 11 denotes a ventilation duct in the dust collector, and in the path of the ventilation duct 11, an intermediate wall 1 intersecting with an axis 12 of the ventilation duct 11.
3 are arranged to form a sectional passage 14 in which the diameter of the ventilation passage is gradually reduced in the air flow direction and a sectional passage 15 in which the diameter of the ventilation passage is gradually increased. And both roads 14 and 15
The dust collecting filters 16 and 17 having a single structure are arranged side by side on the wide diameter side to construct a dust collecting filter device.

The structure of this embodiment has been described above. Next, its operation will be described.

The air flowing through the ventilation duct 11 is divided into air passing through the dust collecting filter 16 and air passing through the dividing passage 15. The flow rate of each of the divided air is determined by the ventilation of the dust collecting filter 16. The diameter of the dust collecting filter 16 and the small diameter side of the divided passage 15 are set in advance so that the resistance and the ventilation resistance of the divided passage 15 become substantially equal.

Therefore, the amount of dust collecting air collected by the dust collecting filter 16 and guided to the dividing passage 14 and the amount of air guided to the dividing passage 15 and about to be collected by the dust collecting filter 17 are substantially equal to each other. The air to be collected and the dust-collected air supplied into the ventilation duct 11 are treated for two minutes by both dust collecting filters 16 and 17, so that the dust collecting filters have good dust-collecting responsibilities, and the dust collecting filters collect dust. The durability time can be significantly extended.

To explain the operation of the present invention more concretely, for example, by using a ventilation duct 11 having a diameter equal to that of the conventional ventilation duct shown in FIG. When the dust collection filter 16 is set so that the ventilation resistance with respect to the divided passage 15 is substantially reduced, the ventilation resistance of the dust collection filter 16 is larger than that of the dust collection filter 6 shown in FIG. It is possible to obtain the dust collecting filter 16 having a ventilation resistance that is 1/2 or less of that of the dust collecting filter 6. Therefore, if the ventilation resistance of the dust collection filter 16 is about 75% of the ventilation resistance of the conventional dust collection filter 6 shown in FIG. 1, the dust collection filters 16 and 17 of a single structure are installed in the ventilation duct 11. In the filter device of the present embodiment, which is arranged in parallel with each other, a ventilation amount of about 15% can be obtained as compared with the conventional device shown in FIG.

Further, in the prior art example shown in FIG. 2, since the dust collecting filters 6 having the single structure and the two dust collecting filters are arranged in series, the ventilation resistance is increased to about twice, and accordingly, As a matter of course, the ventilation resistance of the dust collecting filter having the structure of this embodiment is significantly improved.

[0014]

As described above, according to the present invention, the ventilation duct 11 is provided.
The interior of the partition is divided by an intermediate wall 13 that is inclined so as to intersect the flow axis direction of the duct to form respective partition paths, and the dust collecting filter 1 is provided on each wide diameter side of these partition paths.
Since this is a filter device in which the filters 6 and 17 are arranged, the collected dust supplied into the ventilation duct 11 is treated by the filters 16 and 17 for two minutes, so that the dust collecting function of each of the dust collecting filters is increased. Good, the effect that the dust collection durability time by each dust collection filter can be significantly lengthened is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a conventional filter device.

FIG. 2 is an explanatory view showing a filter device of a prior art example.

FIG. 3 is a structural explanatory view showing a filter device according to an embodiment of the present invention.

[Explanation of symbols]

 11 ... Ventilation duct 12 ... Axis line 13 ... Intermediate wall 14 ... Division path 15 ... Division path 16 ... Dust collection filter 17 ... Dust collection filter

Claims (1)

[Claims] 1. An intermediate wall (1) inclined so that the inside of the ventilation duct (11) intersects the flow axis direction of the duct.
3) to form respective divided passages, and the dust collecting filters (16), (1
7. A filter device characterized in that 7) is arranged.