Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:
As shown in
The first housing part 212 of the housing 21 is formed with an air inlet 213 in a form of a grid and an air outlet 214 spaced apart from the air inlet 213. The first housing part 212 has an inclined wall segment formed with the air inlet 214. The first housing part 212 of the housing 21 is further formed with a pair of barrier walls 215 that surround the air outlet 214, that extend from the first housing part 212 toward the second housing part 211, and that cooperatively define a receiving groove 217 for receiving the air filter core 23.
The air guide unit 22 includes a plurality of guide plates 216 that extend from the first housing part 212 of the housing 21 toward the second housing part 211, and that define a plurality of guide ducts 218. The guide plates 216 are not higher than and are surrounded by the barrier walls 215 in the first housing part 212. The guide plates 216 are disposed in radial directions relative to the air outlet 214 in the first housing part 212.
The air guide unit 22 further includes four spaced apart baffle plates 221 and first and second baffle members 222, 223. The baffle plates 221 extend from the second housing part 211 of the housing 21 toward a side 231 of the air filter core 23 opposite to the air outlet 214. The baffle plates 221 are disposed parallel to each other and define a plurality of air ducts 224. The first baffle member 222 is in a form of a plate and extends from the second housing part 211 toward the first housing part 212. The first baffle member 222 is transverse to the baffle plates 221 and forms a first gap 201 with the first housing part 212. The second baffle member 223 is in a form of a plate, and extends from the first housing part 212 toward the second housing part 211. The second baffle member 223 is transverse to the baffle plates 221 and forms a second gap 202 with the second housing part 211.
The filter mounting plate 24 is disposed in the first housing part 211 of the housing 21, and includes a metal plate body 241 formed with a through hole 242 that is disposed to correspond to the air outlet 214 in the first housing part 212. The fastening unit 243 extends through the filter mounting plate 24 and the first housing part 212 of the housing 21, and is adapted to fasten the housing 21 to the machine 3.
Air that flows into the housing 21 via the air inlet 213 meanders through the first and second gaps 201, 202 in the housing 21 and is then guided by the baffle plates 221 in the second housing part 211 to flow through the air ducts 224 toward the side 231 of the air filter core 23 before being filtered by the air filter core 23. The filtered air is guided by the guide plates 216 of the housing 21 to flow from the air filter core 23 to the air outlet 214 in the housing 21 through the guide ducts 218. The filtered air finally exits the housing 21 via the air outlet 214 and enters the machine 3.
According to the preferred embodiment, air that flows into the housing 21 via the air inlet 213 is limited to flow through the first and second gaps 201, 202 to the air filter core 23 rather than flowing directly to the air filter core 23, thereby resulting in homogenization of the air. In addition, the design of the first and second gaps 201, 202 slows down the velocity of the air that flows into the housing 21 via the air inlet 213, thereby reducing the generation of noise.
The air filter core 23 is pressed by the baffle plates 221 and is surrounded by the barrier walls 215 in the first housing part 212, so that the air filter core 23 is positioned firmly in the receiving groove 217. Since unfiltered air is guided by the baffle plates 221 of the air guide unit 22 to flow through the air ducts 224 in the first housing part 212, the unfiltered air is directed to flow evenly through the air filter core 23, i.e., the air flows through a large part of the air filter core 23 rather than flowing through only a small part of the same. Compared to the prior art, the air filter core 23 of the present invention filters air more effectively and is more durable.
The structure of the guide plates 216 in the first housing part 212 not only guides filtered air to flow through the guide ducts 218 and the air outlet 214 in the first housing part 212 to the machine 3, but also avoids producing a single airflow in the machine 3 for improving combustion.
The grid-shaped structure of the air inlet 213 in the first housing part 212 covers a relatively large area for a relatively large air inflow. Compared to a single-hole air inlet with the same size, the design of the air inlet 213 ensures a stronger structure of the first housing part 212, and can further prevent floccules from blocking up the air inlet 213.
It should be noted that, while this invention is exemplified using a pair of baffle members 222, 223, only one baffle member may be employed in other embodiments of this invention.
While the present invention has been described in connection with what is considered the most practical and preferred embodiment, it is understood that this invention is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
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200610054232.0 | Apr 2006 | CN | national |