JP3398122B2 - Air cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner using a resin molded product, and more particularly to improving intake noise by increasing rigidity while ensuring a separating function as a dust pan. It is related with the air cleaner which can do. [0002] In a vertical type air cleaner used as a means for filtering air supplied to a vehicle engine, it is necessary to provide a dust pan at the bottom of the air cleaner case to separate dust and water. In addition, an outer cover that covers the inner cover that forms the bottom wall of the air cleaner case is provided, and the dust pan is configured by both covers. In order to reduce the weight and manufacturing cost of such an air cleaner, it is effective to make the air cleaner case and both cases resinous, but when both the inner cover and the outer cover are formed of a resin molded product,
Since the rigidity of these covers is reduced and the membrane vibration accompanying the intake pulsation is increased, the intake sound is deteriorated. Therefore, conventionally, the inner cover is made of an iron plate and is fixed to the bottom of the air cleaner case at some sacrifice of weight and manufacturing cost, and then a rib is provided on the surface of the outer cover to improve the rigidity. . In addition, because the height of the ribs is restricted due to the mounting space of the air cleaner, providing a large rib to improve the reinforcing effect reduces the volume of the dust pan, which greatly affects the dust separation function. End up. Accordingly, when an air cleaner is configured by combining a resin air cleaner case and outer cover with an iron plate inner cover as in the prior art, the weight and manufacturing of the air cleaner satisfying both the dust separating function and the intake sound. It was considered extremely difficult to improve the cost. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a lightweight and inexpensive air cleaner capable of improving the intake sound without affecting the dust separation performance. It is an issue to provide. In order to solve the above-mentioned problems, the present invention relates to an air cleaner case that houses an air cleaner element, an inner cover that constitutes a bottom wall of the case, and an inner cover. Each of the outer covers constituting the dust pan is made of a resin molded product. The two covers are welded and joined on the circumference, and are detachably attached to the bottom of the air cleaner case, and the intermediate portions of the two covers are joined via a support column. DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of an air cleaner according to the present invention, and FIG. 2 is an enlarged sectional view of the dust pan shown in FIG. In these drawings, an air cleaner case 2 for accommodating an air cleaner element 1 having a ring shape.
An air outlet 3 is provided on the top wall of the air cleaner, and an air inlet (not shown) is provided at an appropriate position on the peripheral wall of the air cleaner case 2. A plurality of protrusions 5 are provided at the central and peripheral portions of the upper surface of the inner cover 4 that is detachably attached to the bottom of the air cleaner case 2 so as to contact the air cleaner element 1 from below and position and fix the element 1. ing. An outer cover 6 is arranged below the inner cover 4 and the covers 4 and 6 are joined and fixed on the circumference to constitute a dust pan 7. Further, the column-shaped column 8 is erected at the center of the lower surface (outer surface) of the inner cover 4, and the lower end of the column 8 is joined and fixed to the upper surface of the outer cover 6. 6 is coupled and fixed, and the dust pan 7 is divided into an outer peripheral chamber 7a and an inner peripheral chamber 7b. The air cleaner case 2, the inner cover 4, and the outer cover 6 are each formed of a resin molded product, and the support column 8 is formed integrally with the inner cover 4 so that the covers 4 and 6 are vibration welded on the circumference. The lower end of the support column 8 is bonded and fixed to the upper surface of the outer cover 6. However, these connecting means may be any conventionally known means. The inner cover 4 is recessed and formed so as to be immersed in the air cleaner case 2, and the holes 9 are formed in a plurality of locations (four equally spaced locations in the embodiment) corresponding to the peripheral wall.
The outer periphery of the bottom of the air cleaner case 2 is provided in the outer peripheral chamber 7a.
On the other hand, the holes 10 for communicating the outer peripheral chamber 7a and the inner peripheral chamber 7b are provided at two equally spaced positions on the lower end of the support column 8, so that the dust introduced into the outer peripheral chamber 7a from the bottom of the air cleaner case 1 can be It is led to the peripheral chamber 7b. 11
Is a normally closed dust unloader valve provided in the center of the outer cover 6 and is opened by the pulsation of the intake air to open the inner peripheral chamber 7b.
Dust is automatically discharged. Reference numeral 12 denotes a reinforcing plate provided on the inner surface of the outer cover 6, and reference numeral 13 denotes a reinforcing rib provided on the outer surface of the outer cover. In the air cleaner constructed as described above, not only the air cleaner case 2 but also the dust pan 7
The inner cover 4 and the outer cover 6 that constitute the above are both formed of a resin molded product. Therefore, the weight and manufacturing cost of the air cleaner can be reduced as compared with the conventional product in which the inner cover is made of an iron plate. In addition, since the intermediate portion between the inner cover 4 and the outer cover 6 made of a resin molded product is coupled by the support column 8 to increase the rigidity of the dust pan 7, the inner cover 4 and the outer cover 6 vibrate due to the pulsation of the intake air. No noise. Further, since the support 8 is provided to increase the rigidity of the dust pan 7 as described above, there is no need to reinforce the outer cover 6 by providing a rib large enough to sacrifice the dust separation function. If the cylindrical support column 8 is provided and the dust pan 7 is divided into the outer peripheral chamber 7a and the inner peripheral chamber 7b as in the embodiment, the air swirling performance has a great influence on the dust separation performance. Since the resonance frequency of the dust pan 7 can be easily separated greatly from the pulsation frequency of the intake air without being lowered, vibration due to resonance can be effectively suppressed, but the shape of the support column 8 is not limited to the embodiment. That is, when the volume of the dust pan 7 is large, the dust pan 7
It is also possible to make the dust pan 7 function as a single separation chamber by separating the three or more chambers, or by providing only ordinary support columns having no separation function. Further, in the embodiment, the normally closed dust unloader valve 11 that is opened by intake pulsation is provided at the center of the outer cover 6 to automatically discharge dust, but a dust unloader valve that automatically opens is provided. There is no need. As is apparent from the above description, the present invention is a resinized inner cover and outer cover that constitute a dust pan as well as an air cleaner case, so that the weight and manufacturing cost of the air cleaner are reduced. can do. In addition, the middle part of the inner cover and the outer cover is connected with a support column to ensure the rigidity of the dust pan.Therefore, there is no need to reinforce the outer cover by providing a large rib, which greatly affects dust separation performance There is no sacrifice in the volume of the dust pan.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an embodiment of an air cleaner according to the present invention. FIG. 2 is an enlarged sectional view of the dust pan shown in FIG. [Explanation of Symbols] 1 Air cleaner element 2 Air cleaner case 3 Air outlet 4 Inner cover 6 Outer cover 7 Dust pan 8 Post 9, 10 hole

Claims (1)

(57) [Claims] [Claim 1] A vertical-type air cleaner in which a dust pan is provided at the bottom of an air cleaner case that houses an air cleaner element, and the air cleaner case and the bottom wall of the case are configured The inner cover and the outer cover that constitutes the dust pan in combination with the inner cover are each formed of a resin molded product, both the covers are welded and joined on the circumference, and are detachably attached to the bottom of the air cleaner case. An air cleaner characterized in that the parts are coupled via a support column.