JP2003056993A - Air cooler for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cooler arranged not to be applied with an undue force through expansion of a cooling pipe, and a lightweight air cooler which can be produced inexpensively. SOLUTION: The air cooler comprises a plurality of cooling pipes penetrating a large number of fins arranged in an air supply passage in parallel with the direction of air flow and is coupled directly with an air supply manifold. The plurality of the cooling pipes penetrate, at the opposite end parts thereof, the flat part of a thick disc-like supporting member or a bottomed tubular supporting member while keeping watertightness. Watertight sustaining members are provided on the curved outer wall of the supporting member in order to sustain watertightness between the wall of air supply passage and the supporting member and at least one watertightness sustaining member is slidable with respect to the wall of air supply passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cooler for an internal combustion engine in which a plurality of parallel cooling pipes for passing cooling water are provided with a large number of fins.

[0002]

2. Description of the Related Art FIG. 6 is a disassembled perspective view of a conventional air cooler 500 of the air supply manifold riding type. As shown in FIG. 6, the conventional long type air cooler 500 is configured by many parts mainly fastened by bolts and nuts not shown, and a flat packing is used to keep watertightness. There is. In such a configuration, when the cooling pipe through which the cooling water flows thermally expands, the thermal expansion of the long cooling pipe cannot be absorbed, and thus an unreasonable load is applied to the cooling pipe and the supporting member that supports the cooling pipe. It can cause damage to the device.
Further, such an assembly type air cooler has a large number of constituent parts, is expensive, and is considerably heavy.

[0003]

DISCLOSURE OF THE INVENTION According to the present invention, an air cooler constructed so that an excessive force is not applied to the device due to thermal expansion of a cooling pipe is provided, and it is lightweight and can be manufactured at low cost. It is an object to provide an air cooler.

[0004]

In order to solve the above problems, according to the invention of claim 1, a plurality of fins are arranged in the air supply passage in parallel with the flow direction of the air, and a plurality of fins penetrate the plurality of fins. In an air cooler including a cooling pipe and directly connected to an air supply manifold, a flat portion of a thick disk-shaped support member or a bottomed cylindrical support member is kept watertight at both ends of the plurality of cooling pipes. A watertight holding member is provided on the curved outer wall of the support member so that the watertightness between the air supply passage wall and the support member is maintained by the watertight holding member, and at least one of the watertight holding members is an air supply passage. Made slidable against the wall. According to the invention of claim 2, in the invention of claim 1, the air cooler is provided integrally with the air supply passage. According to a third aspect of the present invention, in the first or second aspect of the present invention, a guide portion is provided in the air supply passage on the air inflow side of the air cooler, and the air is dispersed and flows into the air cooler by the guide portion. I decided to do it. According to a fourth aspect of the present invention, in the first or second aspect of the present invention, a partition wall is provided in the air cooler to partition the air supply passage, and air flows between the cooling pipes along the partition wall and the fins. After passing a plurality of times, it was made to flow out to the air supply manifold.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially longitudinal front view of an air cooler 100 according to the first to third aspects of the present invention. The air cooler 100 includes a housing 2, a water supply side lid 6, a cooling pipe 5, a fin 4, and the like.

The air cooler 100 is provided with guides 14 to 16 in the air supply passage 1, and the air sucked into the housing 2 (also serving as the air supply duct) is first branched into two by the guide 15. And the guide parts 14, 16
And are evenly distributed in the longitudinal direction of the air supply passage 1. Although FIG. 1 shows a case where the air flows in the longitudinal direction, when the air flows in from a direction other than the longitudinal direction, the guide portion may be provided parallel to the traveling direction of the air.

The housing 2 is provided with holes 8 and 9.
An annular (thick-walled disc-shaped) support member 13 is in contact with the hole 8, and the water supply side lid 6 is fixed to the housing 2 so as to sandwich the support member 13. Support member 13 and water supply side lid 6
An O-ring 11 is provided between them, and the O-ring 11 maintains the watertightness between the air supply passage 1 and the inside of the water supply side lid 6 (that is, the watertightness between the air supply passage wall and the support member is maintained). I keep it).

A drain side lid 7 is fixed to the hole 9. As shown in FIG. 1, a part of the inner peripheral surface of the drain side lid 7 has the same diameter as the hole 9, and the O-ring 1 provided on the drain side lid 7 is
No. 0 maintains the watertightness between the inside of the drain side lid 7 and the air supply passage 1 (that is, maintains the watertightness between the air supply passage wall and the support member), and the support member 12 has the holes 9 and 9. It is slidable on the inner peripheral surface of the drain side lid 7 having the same diameter as the.

A large number of cooling tubes 5 (only five of which are shown in FIG. 1) made of metal having a high thermal conductivity penetrate through the supporting members 12 and 13. The cooling pipe 5 guides the cooling water supplied from the water supply side cover 6 to the drain side cover 7 without intruding into the air supply passage 1.

Further, the cooling pipe 5 penetrates a large number of fins 4 arranged in parallel with the air flow direction in the air supply passage 1. As shown, it is arranged in the air supply passage 1.

FIG. 2 is a view taken along the line II-II of FIG. Figure 2
As shown in FIG. 3, the fins 4 have a thin disk shape. For example, the fins 4 having a thickness of 0.2 mm are arranged at 1 mm intervals and penetrate a large number of cooling pipes 5. Air (high temperature air) sucked from the housing 2 is dispersed in the longitudinal direction of the air supply passage 1 by the guide portions 14 to 16 and further passes through a space finely partitioned by the fins 4 and the cooling pipes 5.

Low-temperature cooling water is flowing in the cooling pipe 5, and the cooling water takes heat from the high-temperature air through the cooling pipe 5 and the fins 4, raises the temperature and is discharged from the drain side lid 7. . Further, the high-temperature air is cooled by cooling water, and the cooled air is provided on the downstream side of the air supply passage 1 (connected to the housing 2 by the bolts and nuts 17).
Is supplied to.

Since the cooling pipe 5 is made of metal having a high thermal conductivity, it expands when the temperature rises. As shown in FIG. 1, the left end of the cooling pipe 5 is supported by the support member 12, but the support member 1
An O-ring 10 is slidably supported on the hole 9 of the housing 2 and the drain side lid 7 by an O-ring 10 so as to be slidable.

Therefore, even if the cooling pipe 5 expands and extends in the longitudinal direction, the support member 12 (O-ring 10) moves to the left, and an unreasonable force is not applied to the cooling pipe 5. As shown in FIG. 1, a gap 20 is previously provided between the support member 12 and the drain-side lid 7, and the gap 20 is set to a size capable of accommodating the expanded cooling pipe 5.

In the air cooler 100 of FIG. 1, the support member 1
Although only 2 is movable, the support member 13
Also, the support member 12 may be configured and moved similarly to the support member 12. However, in that case, the movement range of the support member 13 is limited to the hole 8 of the housing 2 and the inner peripheral surface of the water supply side lid 6 (portion having the same diameter as the hole 8). In the air cooler of FIG. 1, the cooling water enters from one of the water supply side lids 6, and the cooling pipe 5
Although it flows to the drainage side lid 7 of the other side through the above, it may be a system in which one side lid has a water supply / drainage port and the other side lid folds back (U-turn).

FIG. 3 is a schematic partial vertical sectional front view of an air cooler 200 having a structure different from that of FIG. FIG. 4 is a view taken along the line IV-IV in FIG. The air cooler 200 includes a cooling pipe 5 and fins 4 inside the housing 28. Figure 3
And as shown in FIG. 4, the air supply duct 2 ′ and the air cooler 2
They are separate from 00, and they are fixed by bolts and nuts 23. The other configuration of the air cooler 200 is shown in FIG.
It is the same as the air cooler 100 of the above. Also, the air cooler 2
00, the same components as those of the air cooler 100 (FIG. 1) are denoted by the same reference numerals.

The air cooler 200 includes a bolt / nut 23.
By removing 17 and 17, it can be taken out as one unit from the air supply duct 2 ′ and the air supply manifold 3. Therefore, the air cooler 200
Is easier to maintain than the air cooler 100 because the air supply duct 2'can be separated.

FIG. 5 shows the air cooler 100 of FIG. 1 and FIG.
2 is a partially longitudinal front schematic view of an air cooler 300 having a configuration different from that of the air cooler 200 of FIG. In the air supply duct 2 ″ of the air cooler 300, the air coolers 100 and 2 are provided.
No guide part is provided as in the case of No. 00, but a partition part 30 is provided instead.

As shown in FIG. 5, the partition portion 30 is arranged at a position of about one-third of the air supply passage 32 on the side of the air supply port 2a in the longitudinal direction, and the air supply passage 32 is divided into a region 35 and a region. It is divided into 37.

The lower end of the partition 30 is formed along the shape of the upper end of the fin 4, and the high temperature air flowing in from the air supply port 2a is blocked by the partition 30 to the left of the partition 30. It cannot proceed, but advances in a fine space between the fin 4 and the cooling pipe 5.

As shown in FIG. 5, a partition 31 having a small hole 40 (a hole for draining condensed water) is provided at the bottom of the housing 28. The partition part 31 is bent and formed so that its cross section is L-shaped, and is bent at a position of about two-thirds from the intake port 2a side in the longitudinal direction of the air supply passage 32. Partition 3
A region 36 is formed by the horizontal portion of 1, the fin 4, and the cooling pipe 5. Also in the air cooler 300, like the air cooler 200, the same components as those of the air cooler 100 (and 200) are denoted by the same reference numerals.

The air which has been blocked downward from the left by the partition 30 and has advanced downward from the region 35 reaches the region 36,
Proceed to the left along the horizontal part of the partition 31. The air in the region 36 rises in the fine space between the fin 4 and the cooling pipe 5 between the upright portion of the guide plate 25 provided in the fin and the partition 30 to reach the region 37, and further the partition 31. Is supplied to the air supply manifold 3 while descending in the fine space between the fins 4 and the cooling pipes 5 arranged on the left side of the upright portion. Note that the guide plate 25 may not be used, and the corresponding fin may have a guide function.

As described above, in the air cooler 300, the air flowing in from the air supply port 2a passes through the space between the fin 4 and the cooling pipe 5 three times. That is, by increasing the flow velocity of the air passing between the fins 4 and the cooling pipes 5,
The heat transfer coefficient on the air side is increased, and as a result, a good cooling effect is obtained.

The supporting member 12 shown in FIGS. 1, 3 and 5.
Has a thick disk shape, but is slidable on the inner peripheral surface of the hole 9 and the exhaust side lid 7 (portion having the same diameter as the hole 9).
It may have a cylindrical shape that can include the ring 10. However, in the case of a cylindrical shape, it is necessary to have a bottom for convenience of supporting the cooling pipe 5.

[0025]

According to the first aspect of the present invention, the hole 9 of the housing 28 and the inner peripheral surface (portion having the same diameter as the hole 9) (air passage wall) of the drain side lid 7 (air passage wall) are kept watertight and slidable. Since the O-ring 10 (watertight holding member) is provided in 12, the cooling pipe 5 can be protected by moving the support member 12 even if the cooling pipe 5 thermally expands. At this time, since the housing can be integrally molded, the air cooler can be manufactured at low cost while reducing the weight.

According to the second aspect of the invention, as shown in FIG. 1, the housing 2 of the air cooler 100 is provided integrally with the air supply duct 2 '(FIG. 3). Therefore, the size and weight of the apparatus can be reduced. The present invention can be further achieved than the first aspect.

In the third aspect of the invention, since the guide portions 14 to 16 are provided in the housing 2 (air passage), the air flowing through the housing 2 (air supply passage 1) is uniformly dispersed in the air supply passage 1. In addition, it is possible to flow into the fine spaces between the large number of fins 4 and the plurality of cooling pipes 5 installed in the air supply passage 1 without any bias, and it is possible to exhibit good cooling performance.

In the fourth aspect of the invention, the air cooler 300 is provided with the partition portions 30 and 31, so that the air is cooled by the cooling pipe 5.
Since the air flows out to the air supply manifold 3 after passing through a plurality of times (three times in the example of FIG. 5), the air is cooled a plurality of times, and a good cooling effect can be expected.

[Brief description of drawings]

FIG. 1 is a schematic front view of a partially longitudinal section of an air cooler according to the first to fourth aspects of the invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a schematic partial vertical sectional front view of an air cooler having a configuration different from that of FIG.

FIG. 4 is a view taken along the line IV-IV in FIG.

5 is a schematic partial vertical cross-sectional front view of an air cooler having a configuration different from that of the air coolers of FIGS. 1 and 3. FIG.

FIG. 6 is a disassembly diagram of a conventional air cooler.

[Explanation of symbols]

1 air supply passage 2 housing 2 ', 2 "air supply duct 3 Air supply manifold Four fins 5 cooling tubes 6 Water supply side lid 7 Drain side lid 8, 9 holes 10,11 O-ring 12, 13 Support member 14-16 Guide part 20 gaps 25 guide plate 28 housing 30,31 partition 32 Air supply passage 35-37 area 40 small holes 100,200,300 Air cooler

Claims (4)

[Claims] 1. An air cooler in which a large number of fins are arranged parallel to the flow direction of air in an air supply passage, and a plurality of cooling pipes penetrating the plurality of fins are provided, and an air supply manifold is directly connected, A watertight holding member is provided on the curved outer wall of the support member while watertightly penetrates the flat portion of the thick-walled disc-shaped support member or the bottomed cylindrical support member at both ends of the plurality of cooling pipes. An internal combustion engine characterized in that the watertightness maintaining member maintains watertightness between the air supply passage wall and the support member, and at least one of the watertightness maintaining members is slidable with respect to the air supply passage wall. Air cooler. 2. The air cooler for an internal combustion engine according to claim 1, wherein the air cooler is provided integrally with the air supply passage. 3. The air conditioner according to claim 1, wherein a guide portion is provided in an air supply passage on an air inflow side of the air cooler, and the guide portion allows the air to be dispersed and flow into the air cooler. An air cooler for an internal combustion engine as described. 4. A partition wall which divides an air supply passage is provided in the air cooler so that air flows to the air supply manifold after passing a plurality of times along the partition wall and fins between the cooling pipes. The air cooler for an internal combustion engine according to claim 1 or claim 2.