JP2010260448A - Sealing structure of vehicular radiator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool cooling water of a radiator arranged downwind by decreasing, by using an intercooler arranged upwind of a cooling wind, a temperature of the cooling wind heated by a heat exchange with high-temperature compressed air. <P>SOLUTION: A sealing structure of a vehicular radiator has: an intercooler 1 arranged with a core part 4 for passing compressed air from the inlet header 6 to the outlet header 7 between an inlet header 6 and an outlet header 7 opposing to each other and having pipe parts 6a and 7a for flowing the compressed air and spreading parts 6b and 7b formed at the tip ends of the pipe parts 6a and 7a, respectively, and for performing the heat exchange between the compressed air and the cooling wind flowing in a crossing direction with the air; and a radiator 2 arranged downwind of the cooling wind of the intercooler 1, and for performing the heat exchange between the cooling water and the cooling wind. A sealing member 17 surrounds around the cooling wind passage between the intercooler 1 and the radiator 2 to form a wind channel. In this case, a vent hole 18 is formed in a downwind area of the pipe part 6a of the inlet header 6 of the intercooler 1 by removing the sealing member 17. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a seal structure between a radiator and an intercooler in a vehicle in which a heat exchanger such as a radiator or an intercooler is mounted in series on the front surface of an engine.

  Intercoolers mounted on vehicles exchange heat when circulating compressed air that has been compressed by a supercharger to a high temperature, cool the compressed air, reduce its volume, and increase the amount of compressed air. Was sent to the intake manifold of the engine.

As shown in FIG. 6, the intercooler 1 is formed by alternately laminating a plurality of hollow flat tubes 4 a formed in a hollow and outer fins 4 b formed by bending a plate material in a corrugated manner, and penetrating both ends to a pair of end plates 5. The core portion 4 is formed. An inlet header 6 for introducing compressed air and an outlet header 7 for sending compressed air are attached to each end plate 5 by welding or caulking to form an intercooler 1.
The compressed air flowing in from the inlet header 6 is cooled by the cooling air passing between the outer fins 4b when branching and passing through the flat tubes 4a, and merges at the outlet header 7 to an intake manifold (not shown). Sent.

  As shown in FIGS. 6 and 7, the radiator 2 is mounted on a vehicle for cooling the cooling water heated by the engine, and a plurality of flat tubes 8a and outer fins 8b are alternately stacked, and both ends thereof are mounted. It has a core portion 8 formed so as to penetrate a pair of end plates 9. An upper tank 11 and a lower tank 12 are attached to each end plate 9, and cooling water is introduced into the core portion 8 and delivered from the core portion 8.

  Normally, a fan 3 that sucks cooling air is placed in front of the vehicle engine (on the wind of cooling air), and a radiator 2 that cools cooling water of the engine is arranged in front of it (on the wind of cooling air) to compress The intercooler 1, which is heated by air, was mounted in front of the radiator 2 (upward from the cooling wind) (FIG. 7). In addition, a fan shroud 16 is provided between the radiator 2 and the fan 3 so as to surround the surroundings for wind guidance.

The fan 3 is connected to the engine and is always rotated by the driving force thereof, the bimetal and oil are used and the fan clutch is rotated only at high temperatures in response to the front surface temperature of the fan 3, or Some have an electronically controlled fan clutch or an electric motor, and drive the fan 3 by sensing the coolant temperature of the radiator 2.
In these fans 3, cooling air is sucked from the cooling air intakes on the front surface of the vehicle, and heat exchange is performed by passing through the core portions 4 and 8 of the intercooler 1 and the radiator 2.

In recent years, in order to strengthen exhaust gas regulations and improve fuel efficiency, the supercharging pressure of an engine tends to increase, and the temperature of compressed air compressed by a supercharger also increases accordingly.
In order to cope with this, improvements such as increasing the size of the intercooler 1 and improving heat exchange efficiency by improving the flat tubes 4a and outer fins 4b of the core portion 4 have been made.

Further, increasing the amount of cooling air passing through each heat exchanger also leads to improvement in heat exchange performance.
The solid line arrows in FIGS. 7 and 8 indicate a strong wind flow, and the broken line arrows indicate a weak wind flow.
In a conventional apparatus in which no sealing member is provided between the intercooler 1 and the radiator 2, the cooling air that the fan 3 sucks from the intercooler 1 and radiator 2 side to the engine side as shown in FIG. However, since the traveling wind that is introduced into the vehicle due to traveling of the vehicle and flows around each heat exchanger is stronger, the traveling wind that does not pass through the core portion 4 of the intercooler 1 is between the intercooler 1 and the radiator 2. Phenomenon (intercooler bypass wind) that is sucked from the air and flows to the radiator 2 occurs.
As a result, the amount of cooling air passing through the intercooler 1 is reduced, and the heat exchange performance of the intercooler 1 is reduced.

In addition, when traveling at high speed, as shown in FIG. 8, since the traveling air is stronger than the cooling air sucked by the fan 3, the cooling air that has passed through the intercooler 1 does not pass through the radiator 2, but the intercooler 1 and the radiator 2 Phenomenon flowing out from between (radiator bypass wind) occurs.
As a result, the amount of cooling air passing through the radiator 2 is reduced, and the heat exchange performance of the radiator 2 is reduced.

Therefore, in order to efficiently flow the cooling air, the periphery of the cooling air passage between the intercooler 1 and the radiator 2 is surrounded by the seal member 17 to improve the heat exchange performance by forming the cooling air passage. (Patent Document 1).
Further, in Patent Document 2, in a seal structure of a condenser and a radiator arranged in series in the flow direction of cooling air, one end of a flat plate is wound into a tubular shape, and this flat plate portion is used as a seal member, and the tubular portion It is described that can be reduced in weight and the number of parts by using as a capacitor header.
Further, in Patent Document 3, the side circumference of the first heat exchanger, the second heat exchanger, and the fan shroud arranged in series is surrounded by a sealing member in which a soft resin film is formed in a wide ring shape (belly winding shape). Is described.

JP 2009-12599 A Japanese Patent No. 3336915 JP 2006-170502 A

In this way, the entire periphery of the cooling air passage between the intercooler 1 and the radiator 2 is surrounded by the seal member 17 (FIG. 9), so that all the cooling air that has passed through the intercooler 1 flows to the radiator 2. (FIG. 10).
However, during high-load traveling such as climbing at low speed or high speed, the temperature of the compressed air is the temperature of the radiator cooling water (90 to 100 ° C.) near the inlet pipe portion 6a of the inlet header 6 of the intercooler 1. That's it. Therefore, if the cooling air heated through the intercooler 1 flows to the radiator 2 downstream, the cooling water cannot be dissipated in a part of the radiator 2, and rather, the temperature may rise due to heating by the cooling air. There was also.

  The present invention has been made to solve the above-described problems. In a radiator mounted on a vehicle, the temperature of the cooling air heated by heat exchange with high-temperature compressed air by an intercooler on the cooling air is set. It is an object of the present invention to provide a radiator sealing structure that can lower the cooling water efficiently.

In the present invention, means for solving the above problems are as follows.
The first invention includes a pipe portion through which compressed air compressed by a supercharger is circulated and a diffusion portion formed at a large end at the tip thereof, and between the opposing inlet header and outlet header, An intercooler in which a core portion that passes the compressed air from the inlet header to the outlet header and exchanges heat with the cooling air flowing in the crossing direction is arranged, and is arranged under the cooling air of the intercooler, A radiator that exchanges heat between the cooling water of the engine and the cooling air, and a fan that is arranged under the cooling air of the radiator and sucks the cooling air, are provided between the intercooler and the radiator. In a vehicle radiator seal structure in which the periphery of the cooling air passage is surrounded by a seal member to form a wind tunnel, the leeward of the pipe portion of the inlet header of the intercooler Over the range, to remove the sealing member, characterized in that the formation of the vent.

  The seal structure for a vehicle radiator according to a second aspect of the invention is characterized in that the vent hole is closed with a movable seal that is opened at a high temperature according to the temperature of the cooling air passage.

  According to a first aspect of the present invention, there is provided a vehicular radiator sealing structure in which a periphery of a cooling air passage between the intercooler and the radiator is surrounded by a sealing member to form a wind tunnel, and a pipe portion of an inlet header of the intercooler By removing the sealing member over the leeward area and forming the vent, cold air that has not passed through the intercooler flows from the vent when the vehicle is traveling at low speeds such as uphill traveling on ordinary roads. The temperature is lowered by mixing with the cooling air heated through the air, and good heat exchanging performance can be obtained even in the leeward radiator.

In addition, during high-speed driving and high loads such as climbing on highways, the cooling air that has been heated especially after passing near the pipe part of the intercooler flows out from the vents, without reducing the cooling efficiency of the radiator. Good heat exchange performance can be obtained.
As a result, the fan that is driven and stopped by sensing the front surface temperature of the fan and the coolant temperature of the radiator can reduce the operation time and improve the fuel consumption of the vehicle.

According to the second aspect of the invention, the vent hole is closed with a movable seal that is opened at a high temperature depending on the temperature of the cooling air passage, so that the ventilation hole is hermetically sealed when the cooling air temperature is low and the load is low. Therefore, all of the cooling air that has passed through the intercooler flows to the radiator, and heat exchange efficiency in the low temperature region is increased with a constant and sufficient air volume, and when the temperature of the cooling air rises during high load driving (75-100 ° C At a predetermined temperature in between), the movable seal is opened, and cooling air can enter and exit from the vent.
As a result, cold air that has not passed through the intercooler flows through the vents at high speeds and high loads, and cooling air that has been heated especially by passing near the pipe portion of the intercooler at high speeds and high loads is external to the vents. Therefore, good heat exchange performance in the radiator can be obtained.
For this reason, in the type of fan that senses the front surface temperature of the fan and the coolant temperature of the radiator to drive and stop, the operating time can be further reduced, and the fuel consumption of the vehicle can be improved.

It is a front view which shows the seal structure of the radiator which concerns on embodiment of this invention. It is a side view (at the time of low speed running high load) which shows the seal structure of the radiator. It is a side view (at the time of high-speed running high load) which shows the seal structure of the same radiator. It is a plane explanatory view showing the seal structure of the radiator concerning another form of the present invention, (a) at the time of low load, (b) at the time of high load. It is plane explanatory drawing which shows the seal structure of the other radiator which concerns on another form of this invention, (a) is at the time of low load, (b) is at the time of high load. It is a perspective view which shows the sealing structure of the conventional radiator. It is a side view (at the time of low speed driving) showing the seal structure of the same radiator. It is a side view (during high-speed driving) showing the seal structure of the same radiator. It is a front view which shows the sealing structure of the conventional radiator which provided the sealing member. It is a side view which shows the seal structure of the same radiator.

Hereinafter, the seal structure of the radiator for vehicles concerning the embodiment of the present invention is explained.
In the embodiment of the present invention, as shown in FIGS. 2 and 3, the intercooler 1, the radiator 2, and the fan 3 are arranged in series between the front of the vehicle and the engine (not shown).

  As shown in FIG. 1 (see also FIG. 6), the intercooler 1 has a plurality of hollow flat tubes 4a and corrugated outer fins 4b alternately stacked in the vertical direction, and a pair of flat plates on both left and right sides. The core portion 4 is fixed so as to penetrate the end plate 5. In the core portion 4, compressed air compressed by a supercharger (not shown) flows through the flat tube 4a, cooling air flows through the outer fins 4b in the cross direction, and the compressed air is cooled by heat exchange. .

At both ends of the core portion 4, the inlet header 6 and the outlet header 7 are attached to the end plates 5 and 5.
The inlet header 6 includes an inlet pipe portion 6 a for introducing compressed air, and a diffusion portion 6 b formed at the large end substantially matching the end plate 5 at the tip of the inlet pipe portion 6 a. Considering the space in the engine room, when the inlet header 6 is attached to the core portion 4, the inlet pipe portion 6a is bent so as to face the leeward side.
The inlet header 6 is attached to the core portion 4 by welding or caulking with the diffusion portion 6 b aligned with the end plate 5.

  The opposite end plate 5 is formed symmetrically with the inlet header 6 and is fitted with an outlet header 7 having an outlet pipe portion 7a and a merging portion 7b by welding or caulking. The compressed air cooled by the core portion 4 joins at the joining portion 7b of the outlet header 7 and is sent from the outlet pipe portion 7a to the intake manifold (not shown).

As shown in FIG. 1 (see also FIG. 6), the radiator 2 is formed by laminating a plurality of hollow flat tubes 8a and corrugated outer fins 8b alternately in the horizontal direction, and a pair of flat plate-like upper and lower ends. It has a core portion 8 that penetrates and is fixed to the end plate 9. In the core portion 8, the cooling water heated by the engine flows through the flat tube 8a, the cooling air flows through the outer fins 8b in the intersecting direction, and the cooling water is cooled by heat exchange.
Further, side plates 10 are provided at both ends in the lateral direction of the core portion 8 to protect them.

At the upper and lower ends of the core portion 8, an upper tank 11 and a lower tank 12 are attached to the end plate 9.
The upper tank 11 includes a cooling water inlet pipe 11 a that introduces cooling water, and a diffusion portion 11 b that has a leading end of the cooling water inlet pipe 11 a that is substantially coincident with the end plate 9. In consideration of the space in the engine room, when the upper tank 11 is attached to the core portion 8, the cooling water inlet pipe 11a is bent so as to face the leeward side.
The upper tank 11 is attached to the core portion 8 by welding or caulking with the diffusion portion 11b aligned with the end plate 9.

  A lower tank 12 that is formed in substantially the same shape as the upper tank 11 and has a cooling water outlet pipe 12a and a merging portion 12b is attached to the lower end side end plate 9 by welding or caulking. The cooling water cooled by the core portion 8 joins at the joining portion 12b of the lower tank 12, and is sent out again to the engine from the cooling water outlet pipe 12a.

From both sides of the radiator 2, a pair of intercooler brackets 13 project forward and hold and fix the held portions 14 projecting downward from the intercooler 1.
Further, a pair of vehicle mounting brackets 15 for mounting the radiator 2 on the vehicle are also provided on the side plates 10 on both sides of the radiator 2 so as to protrude sideways.

The fan 3 is disposed leeward of the intercooler 1 and the radiator 2, and a fan shroud 16 that surrounds the side periphery of the fan 3 is installed between the radiator 2 and the fan 3 to guide the air.
As the fan 3 rotates, outside air is taken in from a cooling air intake port provided on the front side of the vehicle, passes through the core portion 4 of the intercooler 1 and the core portion 8 of the radiator 2, and flows into the engine side. Is generated.

  Such a fan 3 is connected to the engine and is always rotated by its driving force. Using a bimetal and oil, a fan clutch is connected and rotated only at high temperatures in response to the front surface temperature of the fan 3. Or an electronically controlled fan clutch or an electric motor that senses the coolant temperature of the radiator 2 and drives the fan 3 can be selected.

  The fan shroud 16 is formed in a cylindrical shape having an opening that contacts the rear rear surface of the core portion 8 of the radiator 2 and an opening that accommodates the front half of the fan 3, and gradually decreases in diameter toward the leeward side. The shape changes continuously from a square tube to a cylinder.

The cooling air passage between the intercooler 1 and the radiator 2 is surrounded by a seal member 17 indicated by a broken line in FIG. 1 to form a wind tunnel.
The seal member 17 can be made of various types of rubber, resin, metal, etc., depending on the usage environment. It is desirable to use a metal plate particularly in an environment where durability is required.

The mounting location of the seal member 17 is substantially the entire circumference of the cooling air passage. However, the seal member 17 is removed to open the vent 18 in the lee of the inlet pipe portion 6a of the inlet header 6 of the intercooler 1. The range in which the vent hole 18 is provided is 1 to 5 times the size of the root portion of the inlet pipe portion 6a (the connecting portion with the diffusion portion 6b).
The position of the vent hole 18 may be changed according to the position of the inlet pipe portion 6a and the position where the temperature becomes high by the inlet pipe portion 6a. For example, when the inlet pipe portion 6a is formed at the upper part or the lower part of the radiator 2 May form the vent 18 on the leeward side, and if the inlet pipe portion 6a is formed at the corner of the radiator 2, the corner seal member 17 may be removed longitudinally and laterally.

As a result, in the seal structure of the present embodiment, the cooling air is stronger than the traveling air as shown in FIG. Partially flows and mixes with the cooling air that has passed through the vicinity of the inlet pipe portion 6a and becomes the highest temperature, so that the temperature of the cooling air is lowered. Therefore, the radiator 2 can also obtain good heat exchange performance.
At this time, since the intercooler bypass air is generated only for the amount necessary for cooling the cooling air, the heat exchange efficiency of the intercooler 1 is not lowered.

In addition, as shown in FIG. 3, when traveling at high speed, such as when traveling on an uphill on a highway, the traveling wind is stronger than the cooling wind, so that the cooling wind that has reached the highest temperature after passing through the vicinity of the inlet pipe portion 6a. Since it flows out to the outside as a radiator bypass wind from the vent hole 18, good heat exchange performance can be obtained without reducing the cooling efficiency in the radiator 2.
At this time, the radiator bypass wind is generated only as much as necessary for heat radiation of the cooling air, so that the heat exchange efficiency of the radiator 2 is not lowered due to the lack of cooling air.

  As a result, in the fan 3 that is driven and stopped by sensing the front surface temperature of the fan 3 and the coolant temperature of the radiator 2, the operation time can be reduced and the fuel consumption of the vehicle can be improved.

As an example of an embodiment of the present invention, a vent 18 is provided by removing the seal member 17 with the same size as the root of the inlet pipe portion 6a on the lee of the inlet pipe portion 6a of the inlet header 6 of the intercooler 1, and a radiator. 2 Cooling air temperature on the front surface was measured.
As a comparative example, when the entire circumference of the cooling air passage between the intercooler 1 and the radiator 2 is surrounded by the seal member 17 (FIGS. 9 and 10), the cooling air temperature on the front surface of the radiator 2 was measured.

As a result, in the comparative example, the cooling air temperature at the time of high load traveling was 118 ° C. in the vicinity of the leeward of the inlet pipe portion 6a at the highest temperature.
On the other hand, in the embodiment of the present invention, the cooling air temperature at the time of high load traveling is suppressed to 82 ° C. even in the vicinity of the leeward of the inlet pipe portion 6a at the highest temperature.

<Another form>
Another embodiment is characterized in that, as shown in FIGS. 4 and 5, the vent 18 is closed with a movable seal 19 that operates at 75 to 100 ° C.
For the movable seal 19, for example, a metal such as a bimetal that operates at a predetermined temperature between 75 to 100 ° C. is used.
The movable seal 19 has one end attached to the side plate 10 of the radiator 2 as shown in FIG. 4 or one end attached to the inlet header 6 of the intercooler 1 as shown in FIG. The other parts can be freely deformed without being constrained.

Hereinafter, the case where the movable seal 19 using a bimetal that operates at, for example, 75 ° C. is installed will be described.
In a traveling state with a low load, the temperature of the compressed air of the intercooler 1 is low, the temperature of the cooling air that has passed through the core portion 4 of the intercooler 1 is also less than 75 ° C., the movable seal 19 does not operate, As with the seal member 17, the vent 18 is sealed by the movable seal 19 (FIGS. 4A and 5A).
For this reason, the whole quantity of the cooling air that has passed through the intercooler 1 flows to the radiator 2, and the heat exchange efficiency in the low temperature region is increased with a constant and sufficient air volume.

On the other hand, during high-load running such as uphill running, the temperature of the compressed air becomes high, and the temperature of the cooling air that has passed through the core portion 4 of the intercooler 1 becomes 75 ° C. or higher. 18 is opened (FIGS. 4B and 5B).
For this reason, as in the above-described embodiment, cold air that has not passed through the intercooler 1 flows through the vent 18 when the vehicle is running at low speed and high load (intercooler bypass wind), and the inlet pipe of the intercooler 1 is loaded at high speed and high load. Since the particularly heated cooling air that passes through the vicinity of the portion 6a flows out from the vent (radiator bypass air), good heat exchange performance in the radiator 2 can be obtained.

  As described above, in order to appropriately switch between the sealed state and the open state of the air vent 18 according to the temperature of the cooling air, the fan of the type that senses the front surface temperature of the fan 3 and the cooling water temperature of the radiator 2 to drive and stop the fan. 3, the operating time can be further reduced, and the fuel efficiency of the vehicle can be improved.

DESCRIPTION OF SYMBOLS 1 Intercooler 2 Radiator 3 Fan 4 Core part 4a Flat tube 4b Outer fin 5 End plate 6 Inlet header 6a Pipe part 6b Diffusion part 7 Outlet header 7a Pipe part 7b Merge part 8 Core part 8a Flat tube 8b Outer fin 9 End plate 10 Side plate 11 Upper tank 11a Cooling water inlet pipe 11b Diffusion part 12 Lower tank 12a Cooling water outlet pipe 12b Junction part 13 Intercooler bracket 14 Holding part 15 Vehicle mounting bracket 16 Fan shroud 17 Seal member 18 Ventilation hole 19 Movable seal

Claims (2)

Between the inlet header and the outlet header, each having a pipe portion through which compressed air compressed by the supercharger circulates and a diffusion portion formed at the tip of the pipe and facing each other, the outlet header to the outlet header An intercooler in which a core part is disposed to allow the compressed air to pass through and to exchange heat with cooling air flowing in the crossing direction;
A radiator that is arranged under the cooling air of the intercooler and performs heat exchange between the cooling water of the engine and the cooling air;
Arranged under the cooling air of the radiator, a fan for sucking the cooling air is provided,
In a vehicle radiator seal structure in which a periphery of a cooling air passage between the intercooler and the radiator is surrounded by a seal member to form a wind tunnel,
A seal structure for a radiator for a vehicle, wherein a vent is formed by removing a seal member over a leeward range of a pipe portion of an inlet header of the intercooler.   2. The seal structure for a vehicle radiator according to claim 1, wherein the vent hole is closed with a movable seal that is opened at a high temperature depending on a temperature of the cooling air passage.

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