JP2017193215A - Intake duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake duct which can prevent the intrusion of water droplets which have been coagulated by a metal gauze, and have trickled down along the metal gauze by surely collecting them.SOLUTION: An intake duct 1 of a vehicle comprises: a duct main body 4 which is opened with an air inlet 3 formed at an upper side, and forms a shell structure; a looper 5 which covers the air inlet 3, and inhibits the direct intrusion of rainwater; and a metal gauze 6 which is interposed inside the looper 5, and prevents the suction of fine foreign matters. A drip channel 7 for receiving water droplets W trickling down along the metal gauze 6 is formed at an inner wall face immediately below the air inlet 3 in the duct main body 4, and the water droplets W are guided to a prescribed water collection part 8 in the duct main body 4 via the drip channel 7.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an intake duct.

  In general, large transport vehicles such as trucks have more opportunities to travel on unpaved rough roads than ordinary passenger cars, so the engine intake air is not the outside air near the ground that contains a lot of dust. Therefore, it is preferable to take in clean outside air at a sufficiently high part from the ground, and there is a risk of rainwater and snow splashing up near the ground, so make sure that only outside air is at a sufficiently high part from the ground. It is preferable to incorporate.

  For this reason, in a large transport vehicle, as shown in an example in FIG. 4, an intake duct b that extends in the vertical direction is installed on the rear surface of the cab a. A duct body d having an outer shell structure by opening the air intake c for intake as engine intake to the upper side, and covering the air intake c to prevent direct rainwater descent (similarly intruding snow) The louver e is provided with a wire mesh f inside the louver e so as to prevent inhalation of fine foreign matters such as dead leaves.

  As prior art document information related to the intake duct as described above, the following Patent Document 1 has already been proposed.

Japanese Patent No. 5325764

  However, in the intake duct b in which the wire mesh f is installed inside the louver e as described above, even if the intrusion of rainwater directly falling on the air intake c can be prevented by the louver e, the flow of air is reduced. It is not possible to prevent fine water droplets such as mist that easily accompany passing through the louver e to reach the wire mesh f, and the water droplets aggregated by the wire mesh f may be transferred down and enter the duct body d. There was this.

  For example, in the case of Patent Document 1 mentioned above, an internal partition component that partitions an internal space near the air intake port of the duct body into a plurality of flow paths by a partition plate is incorporated in the duct body, and the partition plate Although an example with a drip channel at the lower end is disclosed, this is intended for a type of intake duct that does not have a wire mesh inside the louver, and the drip channel shown here is from the air intake. It is for collecting the water droplets that have entered and collided with the partition plate, and it has been proposed that no countermeasure has been proposed for the water droplets flowing down the wire mesh inside the louver.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intake duct that can reliably collect water droplets that have been aggregated and transferred by a wire mesh to prevent entry into the duct body.

  The present invention is an air intake duct of a vehicle, wherein a duct main body having an outer shell structure with an air intake opening on the upper side, a louver that covers the air intake to prevent direct rainwater descent, A drip channel that is interposed inside the louver and prevents a fine foreign substance from being sucked, and that forms a drip channel on the inner wall surface immediately below the air intake in the duct body to receive water droplets that flow down the wire net, The water droplets can be guided to a predetermined water recovery part in the duct body through a channel.

  Thus, even if fine water droplets such as mist reach the wire mesh inside the louver following the flow of air, the water droplets that aggregate and travel on the wire mesh are collected by the air. Since it is received by the drip channel directly under the inlet and guided to the predetermined water recovery section in the duct body through the drip channel and recovered, the water droplets are prevented from entering the duct body.

  The present invention further includes an internal partition component that is built in the duct body and divides an internal space near the air intake port of the duct body into a plurality of flow paths by a partition plate, and is provided immediately below the air intake port of the duct body. It is preferable to provide a drip channel forming portion for forming a drip channel between the inner wall surface and the inner partition part. In this way, it is only necessary to enclose the separately manufactured inner partition part at the time of blow molding of the duct body. A drip channel can be easily formed on the inner wall surface immediately below the air intake port of the duct body.

  Further, when the internal partition component is provided in this way, it is preferable to equip the internal partition component side with a water recovery part that recovers water droplets guided by the drip channel. It is possible to easily provide a water recovery part in the duct body simply by enclosing the parts during blow molding of the duct body, and the water recovery part is defined by sandwiching and crushing a part of the duct body with a mold. It is possible to keep the flow path cross-sectional area large compared to the case of making it.

  According to the intake duct of the present invention described above, various excellent effects as described below can be obtained.

  (I) According to the invention described in claim 1 of the present invention, the water droplets aggregated and conveyed by the wire mesh are received by the drip channel immediately below the air intake port, and the predetermined water recovery in the duct body is performed via the drip channel. Since it can be reliably recovered by being guided to the section, it is possible to prevent water droplets from entering the duct body.

  (II) According to the invention described in claim 2 of the present invention, the drip channel is formed on the inner wall surface immediately below the air intake port of the duct body simply by enclosing a separately manufactured internal partition part at the time of blow molding of the duct body. It can be easily formed, and the cost increase required for newly installing the drip channel can be remarkably suppressed.

  (III) According to the invention described in claim 3 of the present invention, a water recovery part can be easily provided in the duct body simply by enclosing the separately manufactured internal partition part at the time of blow molding of the duct body. Therefore, it is possible to keep the flow path cross-sectional area large compared to the case where the water recovery part is divided and made by sandwiching and crushing part of the duct body with a mold, and a significant increase in intake resistance It can be avoided.

It is an exploded view which shows an example of the form which implements this invention. It is a front view of the air intake duct of FIG. It is a side view of the air intake duct of FIG. It is an exploded view which shows a prior art example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show an example of an embodiment for carrying out the present invention, and an intake duct 1 in this embodiment is similar to the conventional intake duct b described above with reference to FIG. It is configured to take in outside air as intake air for the engine from an air intake 3 that extends in the vertical direction and is opened on the upper side thereof. A duct main body 4 that forms the following: a louver 5 that covers the air intake 3 to prevent direct rainwater from entering, and a wire mesh 6 that is interposed inside the louver 5 to prevent inhalation of fine foreign matter. A drip channel 7 (see FIGS. 2 and 3) is formed on the inner wall surface of the duct body 4 immediately below the air intake 3 to receive the water droplets w (see FIG. 2) that flow down the wire mesh 6, and the drip channel Through 7 It is characterized in was configured to obtain lead the water droplets w to the duct body 4 water recovery unit in the 8 (see FIGS. 2 and 3) Te.

  In particular, in this embodiment, an internal partition component 12 that divides the internal space near the air intake port 3 of the duct body 4 into a plurality of flow paths by the partition plates 9, 10, 11 is incorporated in the duct body 4, When the separately manufactured internal partition component 12 is included when the duct body 4 is blow-molded, the angle-type drip channel forming portion 13 (see FIG. 1) provided on the internal partition component 12 side is provided with the duct body 4. The drip channel 7 (see FIG. 2) is formed between the inner wall surface and the inner wall surface just below the air intake 3 at the inner wall surface. It is provided in a part on the inner partition part 12 side and is integrated with the inner wall surface of the duct body 4 when the duct body 4 is blow-molded.

  Here, the structure of the internal partition component 12 will be described supplementarily. Two of the three partition plates 9, 10, 11 provided in the internal partition component 12 are air intakes. It forms a surface facing the inlet 3 and is arranged at an interval on the front side and the rear side, and the upper side is curved toward the air inlet 3 side so that the air inlet 3 is divided into three parts vertically. In addition, the remaining one partition plate 11 is perpendicular to each other between the partition plates 9 and 10 so as to divide the flow path sandwiched between the two partition plates 9 and 10 into left and right parts. The three partition plates 9, 10, 11 divide the internal space of the duct body 4 near the air inlet 3 into four flow paths.

  Furthermore, the three partition plates 9, 10, 11 are fitted into the inner wall surface of the duct body 4 over the entire circumference in the middle part in the vertical direction of the two partition plates 9, 10, so that the three partition plates 9, 10, 11 are connected to the duct body. A support frame 14 for supporting from the side 4 is formed, but the support frame 14 itself is a similar drip channel forming part including the drip channel forming part 13 as a part, and the air intake 3 A drip channel is formed over the entire circumference including the drip channel 7 directly below.

  Further, the support frame 14 is provided with the above-described water recovery portion 8 (see FIG. 2) so as to recover the water droplets w received by the drip channel (including the drip channel 7) over the entire circumference thereof. The support frame 14 is provided with a downward slope so that the water droplets w can flow down toward the water recovery unit 8, and the surfaces of the two partition plates 9 and 10 correspond to the support frame 14. The drip channels 15 and 16 are formed at a height position where the drip channels 15 and 16 are formed, and a downward gradient is given to the water recovery unit 8.

  A drainage port (not shown) that penetrates the duct body 4 and opens to the outside is provided by post-processing at the bottom of the water recovery unit 8 so that water can be drained from the drainage port. It is preferable to keep it.

  Thus, if the intake duct 1 is configured in this way, even if fine water droplets w such as fog reach the wire mesh 6 inside the louver 5 along with the flow of air, the wire mesh 6 The water droplets w that aggregate and flow down are received by the drip channel 7 immediately below the air intake 3 and are guided to the water recovery unit 8 through the drip channel 7 and recovered, so that the water droplets w enter the duct body 4. Intrusion is prevented.

  In general, this type of air intake duct 1 is manufactured by blow molding. At this time, the internal partition part 12 manufactured separately is included only when the duct body 4 is blow molded. The drip channel 7 can be easily formed on the inner wall surface immediately below the air intake 3 of the duct body 4.

  In addition, since the water collecting part 8 for collecting the water droplets w guided by the drip channel 7 is provided on the inner partition part 12 side, the inner partition part 12 is simply included when the duct body 4 is blow molded. It is possible to easily provide the water recovery unit 8 in the duct body 4 and cut off the flow path as compared with the case where the water recovery unit is partitioned by crushing a part of the duct body 4 with a mold. The area can be kept large.

  Therefore, according to the above-described embodiment, the water droplets w aggregated and carried by the wire mesh 6 are received by the drip channel 7 immediately below the air intake 3 and guided to the water recovery unit 8 through the drip channel 7 to be reliably recovered. Therefore, entry of water droplets w into the duct body 4 can be prevented.

  Further, the drip channel 7 can be easily formed on the inner wall surface immediately below the air intake 3 of the duct body 4 simply by enclosing the separately produced internal partition part 12 when the duct body 4 is blow-molded. It is possible to remarkably suppress an increase in cost required for newly establishing the channel 7.

  Furthermore, the water recovery part 8 can be easily provided in the duct body 4 simply by enclosing the separately produced internal partition part 12 when the duct body 4 is blow-molded. The cross-sectional area of the flow path can be kept large compared with the case where the water recovery unit 8 is divided and made by sandwiching and crushing at, and a significant increase in intake resistance can be avoided in advance.

  The air intake duct of the present invention is not limited to the above-described embodiment, and the drip channel and the water recovery portion directly below the air intake port are not necessarily limited to being formed using internal partition parts. Of course, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Intake duct 2 Cab 3 Air intake 4 Duct body 5 Louver 6 Wire net 7 Drip channel 8 Water recovery part 9 Partition plate 10 Partition plate 11 Partition plate 12 Internal partition component 13 Drip channel formation part w Water droplet

Claims (3)

  An air intake duct of a vehicle, wherein an air intake opening is opened upward to form an outer shell structure, a louver that covers the air intake to prevent direct rainwater falling, and an inner side of the louver A drip channel for receiving water droplets flowing down the wire mesh is formed on the inner wall surface immediately below the air intake port of the duct body, and the drip channel is formed through the drip channel. An air intake duct configured to be able to guide the water droplets to a predetermined water recovery unit in the duct body.   An internal partition component that divides an internal space close to the air intake port of the duct body into a plurality of flow paths by a partition plate, and drip between the inner wall surface immediately below the air intake port of the duct body The air intake duct according to claim 1, wherein a drip channel forming portion for forming a channel is provided in the internal partition part.   The air intake duct according to claim 2, wherein a water recovery part for recovering water droplets guided by the drip channel is provided on the inner partition part side.

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