JP2018031297A - Cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device which reduces a pressure receiving area of a tank and achieves improvement of assemblability.SOLUTION: A cooling device includes: a high temperature side tank into which supercharged air flows; a core part which cools the supercharged air flowing out from the high temperature side tank by heat exchange with outer air; a low temperature side tank from which the supercharged air cooled in the core part flows out; and a water suction pipe 44 which suctions water in the low temperature side tank. The low temperature side tank is formed having a first resin tank part 4 and a second resin tank part 5 which forms a lower chamber 51 located below an upper chamber 41 formed in the first tank part 4 in a state where an upper end peripheral edge part 50 is connected with the first tank part 4. The first tank part 4 and the second tank part 5 form a coupling part where a lower end peripheral edge part 40 and the upper end peripheral edge part 50 are welded to each other.SELECTED DRAWING: Figure 3

Description

  The disclosure in this specification relates to a cooling device that cools supercharged air with air.

  For example, in the case of a downflow type intercooler in which supercharged air flows downward, the intake air condenses and condensate accumulates in the tank, and the water accumulated in the tank flows out into the engine all at once during acceleration. is there. A technique for solving such a problem is disclosed in Patent Document 1, for example. Patent Document 1 discloses an intake air cooling device in which a reservoir for temporarily storing condensed water is provided at a lower portion of a low temperature side tank, and a water suction pipe extending from the bottom of the reservoir to a position opening in the outlet pipe is provided. Has been.

Japanese Patent Laying-Open No. 2015-63913

  The interior of the low temperature side tank in Patent Document 1 is divided into an upper chamber and a lower chamber constituting a reservoir by the partition plate into an upper chamber into which the supercharged air cooled by the core portion flows. According to this configuration, since the inner surface area of one low temperature side tank having a bottom portion is increased, the area receiving pressure is increased, and a low temperature side tank having high pressure resistance is required.

  Moreover, in the apparatus of Patent Document 1, in order to form a reservoir, a separate partition plate, which is a separate part, is fixed to the low temperature side tank with a bolt or the like. For this reason, assembly man-hours are required and there is room for improvement in assembly costs.

  In view of such problems, an object of the disclosure in this specification is to provide a cooling device that reduces the pressure receiving area of a tank and improves the assemblability.

  A plurality of aspects disclosed in this specification adopt different technical means to achieve each purpose. In addition, the reference numerals in the parentheses described in the claims and in this section are examples showing the correspondence with the specific means described in the embodiments described later as one aspect, and limit the technical scope. is not.

One of the disclosed cooling devices includes a high-temperature side tank (1) having an inflow portion (10) into which supercharged air flows, supercharged air that flows out of the high-temperature side tank and circulates inside, and external air. A low temperature side tank (3) having a core portion (2) for cooling the supercharged air by heat exchange, an outflow portion (43) through which the supercharged air cooled in the core portion flows out to an external device, and a low temperature side A water suction pipe (44; 144; 244) provided to extend from the bottom of the tank to the inside of the outflow part,
The low temperature side tank has a resin first tank part (4) having a bottom part (42) partially provided with a through hole (420) and having an upper end opening connected to the core part, and an upper end opening. The resin-made second tank that forms the lower chamber (51) positioned below the upper chamber (41) formed inside the first tank portion in a state where (50) is connected to the first tank portion. Part (5), and
The first tank part and the second tank part form a joint part (40, 50) welded to each other.

  According to this cooling device, the low temperature side tank is formed by welding the first tank part forming the upper chamber and the second tank part forming the lower chamber capable of storing water. For this reason, since the length dimension of the vertical direction can be made small about each tank part, the internal surface area which receives the pressure of supercharging air in one tank part can be made small. Thereby, the pressure | voltage resistant capability which one container should be equipped with can be reduced significantly compared with the case of one low temperature side tank like a prior art. For this reason, since the pressure | voltage resistant capability required for each of a 1st tank part and a 2nd tank part can be suppressed, it becomes possible to form a 1st tank part and a 2nd tank part with a resin material instead of a metal, and product cost Can contribute to the reduction of Further, according to this cooling device, since the upper chamber and the lower chamber in the low temperature side tank can be partitioned by the bottom of the first tank portion, there is no need to attach the partition plate to the low temperature side tank as in the prior art. it can. As described above, it is possible to provide a cooling device that reduces the pressure receiving area of the tank and improves the assemblability.

It is the perspective view which showed the outline | summary of the cooling device of 1st Embodiment. It is the perspective view which showed the outline | summary of the 1st tank part and 2nd tank part which comprise a low temperature side tank. It is the fragmentary sectional view which showed the internal structure of the low temperature side tank. It is the fragmentary sectional view which showed the combined state of the water suction pipe and the 1st tank part in 2nd Embodiment. It is the fragmentary sectional view which showed the combined state of the water suction pipe and the 1st tank part in 3rd Embodiment.

  Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also a combination of the embodiments even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
The cooling device 100 according to the first embodiment will be described with reference to FIGS. The cooling device 100 is a heat exchanger that is installed in a passage through which supercharged air flows in an internal combustion engine including a supercharger and cools air that has risen in temperature due to compression of the supercharger. The cooling device 100 contributes to improving fuel efficiency and output.

  As shown in FIG. 1, the cooling device 100 includes a core that cools the supercharged air by exchanging heat between the high temperature side tank 1 into which the supercharged air flows and the supercharged air that has flowed out of the high temperature side tank 1 and the external air. Part 2, low temperature side tank 3 into which supercharged air cooled by core part 2 flows, and water suction pipe 44. The high temperature side tank 1, the core part 2, and the low temperature side tank 3 are provided in this order from the upstream side to the downstream side of the supercharged air flow.

  The high temperature side tank 1 has the inflow part 10 which forms the inflow port into which supercharging air flows in. A duct or hose that forms an intake path of the internal combustion engine is connected to the inflow portion 10. This duct or hose is connected, for example, to the discharge part of the supercharger.

  As shown in FIG. 1, the core unit 2 is a downflow type core in which supercharged air flows downward. The core portion 2 includes a plurality of passages through which supercharged air flows, and air flows around the tubes constituting the passages. The plurality of tubes in the core portion 2 are fixed to the core plates at both ends by inserting each of both ends into the holes of the core plate. The core plate that supports the plurality of tubes on the high temperature side tank 1 side is caulked so as to cover the outer surface of the high temperature side tank 1, and the core plate that supports the plurality of tubes on the low temperature side tank 3 side is the low temperature side tank 3. It is caulked so as to cover the outer surface. Thereby, the core part 2 is caulked and fixed to each of the high temperature side tank 1 and the low temperature side tank 3.

  The supercharged air that has flowed out of the high temperature side tank 1 is distributed to a plurality of passages in the core portion 2 and then merges inside the low temperature side tank 3. The external air exchanges heat with the supercharged air flowing in the tube by directly contacting the tube or indirectly through the fins. Since the heat of the supercharged air moves to the air flowing outside through the tubes and fins, the supercharged air can be cooled.

  The low temperature side tank 3 is provided with the outflow part 43 which forms the outflow port from which the supercharged air cooled in the core part 2 flows out toward an external apparatus. This external device is, for example, a throttle valve or an internal combustion engine. The outflow portion 43 is connected to a duct or hose that forms an intake path of the internal combustion engine. This duct or hose is connected to, for example, an intake portion of the internal combustion engine. The high temperature side tank 1 and the low temperature side tank 3 are each connected to a vehicle side member via a bracket or the like.

  As shown in FIG. 3, the low temperature side tank 3 is formed by combining a first tank portion 4 and a second tank portion 5. The 1st tank part 4 and the 2nd tank part 5 form the coupling | bond part welded mutually. The lower end peripheral portion 40 of the first tank portion 4 and the upper end peripheral portion 50 of the second tank portion 5 have the same shape. By joining the lower end peripheral part 40 and the upper end peripheral part 50, one joint surface is formed, and the outer periphery of the joint part becomes a joint part welded. The outer periphery of the joint is welded over the entire periphery by, for example, vibration welding, hot plate welding, or laser welding, thereby forming a seal portion that blocks the inside and outside of the tank portion.

  The first tank part 4 is a resin container having an opening at the upper end and a bottom plate part 42 as a bottom at the lower part. The bottom plate part 42 is located above the lower end peripheral part 40. The second tank portion 5 is a resin container that includes an upper end peripheral edge portion 50 having an upper end opened and forms a lower chamber 51 positioned below the upper chamber 41 in the first tank portion 4. The lower chamber 51 functions as a reservoir tank that temporarily accumulates condensed water. The 1st tank part 4 and the 2nd tank part 5 can be formed with resin with high hardness, such as resin containing 6, 6 nylon and glass, for example.

  The first tank portion 4 forms an upper chamber 41 between the upper end opening connected to the core portion 2 and the bottom plate portion 42. The upper chamber 41 is a chamber into which the supercharged air that has flowed out of the core portion 2 flows first in the low temperature side tank 3. The bottom plate portion 42 is provided with a plurality of through holes 420 at arbitrary locations. The upper chamber 41 and the lower chamber 51 are partitioned by the bottom plate portion 42 but communicated by the through hole 420.

  As shown in FIGS. 2 and 3, the bottom plate portion 42 preferably has a shape in which the end portion closer to the outflow portion 43 is positioned below the opposite side. In this case, the through hole 420 is provided at least in a portion of the bottom plate portion 42 that is located below the outflow portion 43. Since the supercharged air that has flowed into the first tank portion 4 flows toward the outflow portion 43, the side close to the outflow portion 43 in the bottom plate portion 42 is a downstream portion and the opposite side is an upstream portion. Accordingly, the bottom plate portion 42 has a shape that descends from the upstream portion to the downstream portion. With this configuration, the water that has dropped onto the bottom plate portion 42 flows to the lower side of the bottom plate portion 42, passes through the through hole 420, and falls to the second tank portion 5.

  The first tank part 4 is provided with an outflow part 43. The outflow part 43 extends so that the tip is positioned higher than the base side near the side wall of the first tank part 4. With this configuration, even if condensed water or the like that has entered the inside of the low temperature side tank 3 overflows into the outflow portion 43, it returns to the inside of the low temperature side tank 3 due to gravity.

  Both ends of the water suction pipe 44 are open and are provided so as to extend from the bottom of the low temperature side tank 3 to the inside of the outflow part 43. It is preferable that the water suction pipe 44 at the bottom of the low temperature side tank 3 is provided so that the opening end thereof is located at the lowermost part of the bottom surface of the second tank portion 5. The water suction pipe 44 is provided integrally with the first tank portion 4 in a state of being integrally formed with the bottom plate portion 42. Therefore, the water suction pipe 44 extends from the inside of the first tank part 4 to the bottom surface of the second tank part 5 so as to penetrate the bottom plate part 42. The water suction pipe 44 can be formed of the same resin material as that of the first tank portion 4, for example, a resin having high hardness such as 6,6-nylon or glass-containing resin.

  The passage sectional area in the outflow portion 43 is smaller than the passage sectional area in the low temperature side tank 3. With this configuration, the flow rate of the supercharged air in the outflow portion 43 is larger than the flow rate of the supercharged air in the low temperature side tank 3. That is, since the supercharged air that has flowed into the low temperature side tank 3 increases in speed when passing through the outflow portion 43, the static pressure in the tank changes to the dynamic pressure in the outflow portion 43, and the inside of the outflow portion 43 The static pressure in the tank will be lower than the static pressure in the tank. Due to this pressure difference, the water accumulated in the lower chamber 51 is sucked into the outflow portion 43 from the bottom of the second tank portion 5 through the water suction pipe 44.

  Below, the effect which the cooling device 100 of 1st Embodiment brings is described. The cooling device 100 includes a high temperature side tank 1, a core portion 2 that cools the supercharged air that has flowed out of the high temperature side tank 1 by heat exchange with external air, and supercharged air that has been cooled in the core portion 2 flows out. A low temperature side tank 3 and a water suction pipe 44 that sucks up water in the low temperature side tank 3 are provided. The low temperature side tank 3 is below the upper chamber 41 formed inside the first tank portion 4 in a state where the first tank portion 4 made of resin and the upper peripheral edge 50 are connected to the first tank portion 4. And a second tank portion 5 made of resin that forms the lower chamber 51. The first tank portion 4 and the second tank portion 5 form a coupling portion in which the lower end peripheral portion 40 and the upper end peripheral portion 50 are welded to each other, and constitute the low temperature side tank 3.

  According to this cooling device 100, the low temperature side tank 3 is formed by welding the first tank part 4 forming the upper chamber 41 and the second tank part 5 forming the lower chamber 51 capable of storing water to each other. The inner surface area that receives the pressure of the supercharged air in one tank portion can be reduced. In particular, since the length in the vertical direction can be reduced for each tank part, it contributes to increasing the rigidity of the tank part. Thereby, compared with the case of one low temperature side tank for the upper chamber and the water reservoir chamber, the pressure resistance capability that one container should have can be greatly reduced.

  For this reason, the pressure | voltage resistance capability required for each of the 1st tank part 4 and the 2nd tank part 5 can be suppressed. Therefore, it becomes possible to form the 1st tank part 4 and the 2nd tank part 5 with a resin material instead of a metal, and it can contribute to reduction of product cost. By forming the low temperature side tank of the aluminum material with a resin material, the weight can be reduced and the tank cost can be reduced. Furthermore, according to this cooling device 100, since the upper chamber 41 and the lower chamber 51 in the low temperature side tank 3 can be partitioned by the bottom plate portion 42 of the first tank portion 4, the partition plate can be placed on the low temperature side as in the prior art. It does not require a process to attach to the tank. The cooling device 100 can reduce the pressure receiving area of the tank and improve the assemblability.

  The water suction pipe 44 is made of the same resin material as that of the first tank portion 4 and is integrally formed with the first tank portion 4. According to this, the water suction pipe 44 and the 1st tank part 4 can be manufactured by one metal mold | die with a metal mold | die. For this reason, parts management man-hours and parts assembly man-hours can be reduced, and product costs can be reduced.

(Second Embodiment)
The second embodiment is different from the first embodiment in the coupling state of the water suction pipe 144 and the first tank portion 4. The configuration, operation, and effects not particularly described in the second embodiment are the same as those in the first embodiment, and only differences from the above-described embodiment will be described below.

  As shown in FIG. 4, the water suction pipe 144 is formed of a material different from that of the first tank portion 4, for example, a metal material. For example, the water suction pipe 144 is made of aluminum or an aluminum alloy.

  The metal water suction pipe 144 is formed integrally with the first tank portion 4 by integral molding of different materials using a mold. For example, a water suction pipe 144, which is a metal molded product, is installed at a predetermined position in the mold, a resin is injected around the water suction pipe 144, and the water suction pipe 144 is wrapped with a molten resin and solidified. By integrating the metal product and the resin in this way, the water suction pipe 144 and the first tank portion 4 of the metal product can be formed with one component. Further, the water suction pipe 144 made of a metal material may be fixed to the first tank portion 4 in a state where the water suction tube 144 is press-fitted into a hole 142 a formed in the bottom plate portion 142 of the first tank portion 4.

  According to the second embodiment, when the water suction pipe 144 made of a metal material is integrally formed with the first tank portion 4, the metal water suction pipe 144 and the resin first tank portion 4 are formed. Can be manufactured in one molded part by a mold. For this reason, the number of parts assembling steps can be reduced and the product cost can be suppressed. Further, since the water sucking pipe 144 can be formed of metal, the shape of the water sucking pipe 144 that does not need to be considered for die cutting can be adopted, so that the water sucking pipe 144 giving priority to the sucking performance can be manufactured.

  Further, when the water suction pipe 144 made of a metal material is fixed to the first tank portion 4 while being press-fitted into the hole 142 a of the first tank portion 4, it is not necessary to consider die cutting. Therefore, the degree of freedom regarding the shape of the water suction pipe 144 is high. As a result, the water suction pipe 144 can be formed in a shape that prioritizes the suction performance.

(Third embodiment)
3rd Embodiment differs in the coupling | bonding state of the water suction pipe 244 and the 1st tank part 4 with respect to 1st Embodiment. The configuration, operation, and effects not particularly described in the third embodiment are the same as those in the first embodiment, and only differences from the above-described embodiment will be described below.

  As shown in FIG. 5, the water suction pipe 244 is a resin molded product formed of a resin material. The water suction pipe 244 may be formed of the same material as the first tank portion 4 or may be made of a different material. The bottom plate portion 142 and the water suction tube 244 are welded together in a state where the water suction tube 244 that is a resin molded product is inserted into the hole formed in the bottom plate portion 142. Therefore, the water suction pipe 244 and the first tank part 4 are integrally fixed by forming a welded part 142b welded to each other.

  According to the third embodiment, the water suction pipe 244 is formed of a resin material and is integrally welded to the first tank portion 4. Compared to the case where the first tank portion 4 and the water suction pipe 244 are integrally formed, it is not necessary to consider die cutting. Thereby, the water suction pipe 244 can be formed in a shape giving priority to the suction performance.

(Other embodiments)
The disclosure of this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combination of components and elements shown in the embodiments, and various modifications can be made. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which the components and elements of the embodiment are omitted. The disclosure encompasses parts, element replacements, or combinations between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. The technical scope disclosed is indicated by the description of the scope of claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the scope of claims.

  In the above-mentioned embodiment, the 1st tank part 4 and the 2nd tank part 5 should just be formed with the resin material which can be welded mutually. Therefore, it is not limited that the resin material of both tank parts is the same material.

  In the above-described embodiment, the method of welding the first tank part 4 and the second tank part 5 to each other is not limited to any one of vibration welding, hot plate welding, and laser welding.

DESCRIPTION OF SYMBOLS 1 ... High temperature side tank, 2 ... Core part, 3 ... Low temperature side tank 4 ... 1st tank part, 5 ... 2nd tank part, 10 ... Inflow part 40 ... Lower end peripheral part (joining part), 41 ... Upper chamber, 42 ... Bottom plate (bottom)
43 ... Outflow part, 44, 144, 244 ... Water suction pipe 50 ... Upper end peripheral part (upper end opening part, joint part), 51 ... Lower chamber 142a ... Hole part, 420 ... Through hole

Claims (5)

A high temperature side tank (1) having an inflow part (10) into which supercharged air flows;
A core portion (2) that cools the supercharged air by heat exchange between the supercharged air that flows out of the high temperature side tank and circulates inside, and external air;
A low temperature side tank (3) having an outflow part (43) through which the supercharged air cooled in the core part flows out toward an external device;
A water suction pipe (44; 144; 244) provided to extend from the bottom of the low temperature side tank to the inside of the outflow part;
With
The low temperature side tank has a resin first tank part (4) having a bottom part (42) partially provided with a through hole (420) and an upper end opening part connected to the core part,
Resin forming a lower chamber (51) positioned below the upper chamber (41) formed inside the first tank portion in a state where the upper end opening (50) is connected to the first tank portion. A second tank part (5) made of,
The cooling device in which the first tank part and the second tank part form a joint part (40, 50) welded to each other.   The cooling device according to claim 1, wherein the water suction pipe (44) is integrally formed with the first tank portion using the same resin material as the first tank portion.   The cooling device according to claim 1, wherein the water suction pipe (144) is made of a metal material and is integrally formed with the first tank portion.   The water suction pipe (144) is formed of a metal material, and the water suction pipe is fixed to the first tank portion while being press-fitted into a hole (142a) formed in the first tank portion. The cooling device according to claim 1.   The cooling device according to claim 1, wherein the water suction pipe (244) is formed of a resin material and is integrally welded to the first tank portion.

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