JP4854574B2 - Oil cooler with built-in radiator - Google Patents

Description

  The present invention relates to an oil cooler for incorporating a radiator.

2. Description of the Related Art Conventionally, a technology of an oil cooler with a built-in radiator including a heat exchanging portion in which an element portion in which an inner fin is accommodated in an internal distribution space is formed is known (see Patent Documents 1 and 2).
JP-A-11-212379 Japanese Patent Laid-Open No. 2002-195783

However, due to the recent narrowing of the engine room for the purpose of enlarging the passenger compartment, a reduction in the width of the radiator tank in the front-rear direction is required, and along with this, the element part of the oil cooler built into the radiator tank is required. There is a need to reduce the number of stages.
Therefore, it is conceivable to lengthen the element portion in the longitudinal direction and reduce the number of stages in order not to deteriorate the heat exchange performance. However, in this case, there is a problem that the flow resistance of oil increases.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to incorporate a radiator that can form a long element without increasing the flow resistance of the oil, and that can cope with the downsizing of the radiator tank. Is to provide an oil cooler.

  In the invention according to claim 1 of the present invention, in the oil cooler with a built-in radiator including a heat exchanging portion in which the element portions in which the inner fins are accommodated in the internal circulation space are provided, the adjacent element portions are arranged in the longitudinal direction. The first connecting space is provided with a first circulation space through which oil can circulate in the longitudinal direction.

  In the invention according to claim 1 of the present invention, in the oil cooler with a built-in radiator including a heat exchanging portion in which the element portions in which the inner fins are accommodated in the internal circulation space are provided, the adjacent element portions are Are connected to each other in the longitudinal direction by a connecting portion, and the connecting portion is provided with a first flow space through which oil can flow in the longitudinal direction, so that the element portion does not increase the oil flow resistance. Can be made longer, and can be used to reduce the size of the radiator tank.

  Embodiments of the present invention will be described below with reference to the drawings.

Example 1 will be described below.
1 is an exploded perspective view showing a radiator built-in oil cooler according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line S2-S2 in FIG. 1, and FIG. 3 is a sectional view taken along line S3-S3 in FIG. 4 is a rear view of the radiator including the radiator built-in oil cooler according to the first embodiment, and FIG. 5 is a cross-sectional view taken along line S5-S5 of FIG.

First, the overall configuration will be described.
As shown in FIG. 1, the oil cooler 1 with a built-in radiator according to the first embodiment is composed of a heat exchanging portion 4 composed of two-stage element portions 2 and 3, and both longitudinal ends of the element portions 2 and 3 Is composed of a pair of headers 5 and 6 fixed in a communication state.

As shown in FIG. 2, each element portion 2, 3 is formed in a tubular shape, and corrugated inner fins 7 are accommodated in a circulation space R provided in the center.
In addition, the central portions in the width direction of both element portions 2 and 3 are integrally coupled by a connecting portion 8 over the longitudinal direction, and the connecting portion 8 is long in the space of both element portions 2 and 3. A first distribution space R1 communicating in the direction is provided.
Furthermore, the 2nd distribution space R2 connected with the distribution space R is formed in the width direction both ends of each element part 2 and 3 over the longitudinal direction.

  In addition, about the dimension, shape, cross-sectional area, etc. of the specific site | part of the element parts 2 and 3, the distribution space R, the 1st distribution space R1, and the 2nd distribution space R2, it can set suitably.

  As shown in FIG. 3, each header 5, 6 is formed in a substantially rectangular shape, and an insertion port 9 a into which the end of each corresponding element part 2, 3 is inserted on the heat exchange part 4 side. Each is provided with a fixing hole 9b that communicates perpendicularly to each insertion port 9a and opens upward.

  Further, a tapered portion 20 having a reduced diameter is formed in the insertion port 9a, whereby the insertion allowance L1 of the heat exchange unit 4 can be regulated and fixed at an appropriate position.

  Further, female screw holes 9c are respectively provided on the upper surfaces of the headers 5 and 6 in the vicinity of the fixing holes 9b, and annular seal grooves 9d and 9e are provided around the holes 9b and 9c, respectively. ing.

  Further, all the constituent members of the above-described radiator built-in oil cooler 1 are made of aluminum, and a clad layer (brazing sheet) made of a brazing material is provided on at least one side of the joint portions of the constituent members. Is preliminarily assembled and brazed and fixed integrally by heat treatment in a heating furnace (not shown).

The radiator built-in oil cooler 1 configured as described above is built in a radiator 10 as shown in FIG.
Specifically, the radiator 10 according to the first embodiment employs a so-called down-flow type radiator in which resin-made radiator tanks 12 and 13 are arranged on both upper and lower sides of an aluminum core portion 11.

  In addition, you may employ | adopt what is called a parallel flow type radiator with which the resin-made radiator tanks are arrange | positioned at the both right and left sides of the aluminum core part. Furthermore, the radiator tank is not limited to resin, and may be made of aluminum.

The core portion 11 includes a plurality of flat tubular tubes 11c whose both ends are inserted and fixed to the tube plates 11a and 11b, and corrugated fins 11d disposed between the adjacent tubes 11c.
The left and right end portions of the core portion 11 are connected and reinforced by a pair of reinforcements 11e and 11f inserted and fixed to the corresponding tube plates 11a and 11b, respectively.

Each of the radiator tanks 12 and 13 is formed in a substantially vessel shape, and its opening peripheral portion is caulked and fixed to the corresponding tube plates 11a and 11b via seal members (not shown).
The radiator tank 12 is provided with a cylindrical input / output port 12a protruding rearward so as to communicate with the inside of the radiator tank 12, while the radiator tank 13 has a cylindrical input / output port protruding rearward. 13 a is provided in communication with the inside of the radiator tank 13.

In the radiator tank 13, the radiator built-in oil cooler 1 is accommodated.
Specifically, as shown in FIG. 5, the radiator built-in oil cooler 1 is provided with annular seal members S1, S2 corresponding to the seal grooves 9d, 9e of the headers 5, 6, respectively. In addition to being in contact with a predetermined position inside the rear side wall portion 13b of the radiator tank 13, input / output ports 14 and 15 (see FIG. 1) corresponding to the fixing holes 9b of the headers 5 and 6, respectively, are disposed in the radiator tank 13. It is inserted through the through hole 13c.

Further, the male screw grooves 9a of the bolts 17 through the corresponding through holes 16a of the corresponding adapters 16 (see FIG. 1) and the through holes 13d of the radiator tank 13 are screwed into the female screw holes 9c of the headers 5 and 6, respectively. Thus, the radiator built-in oil cooler 1 is fixed to the rear side wall 13 b of the radiator tank 13.
The pair of arm portions 16b, 16c projecting from the tip of each adapter 16 abuts against the seat portion 18 of the corresponding input / output port 14, 15, respectively, to regulate the position.

  In addition, an annular seal member S3 is mounted at the lower end of each of the input / output ports 14 and 15, thereby ensuring the sealing performance with the corresponding fixing hole 9b.

Next, the operation will be described.
The radiator built-in oil cooler 1 configured in this way is mounted on a vehicle together with the radiator 10, and in the radiator 10, a high-temperature engine distribution medium flowing into the radiator tank 12 from the input / output port 12 a is supplied to each core portion 11. After circulating through the tube 11c, the vehicle is cooled by exchanging heat with the vehicle running wind or cooling air from a fan (not shown), and then flows into the radiator tank 13 and is discharged from the input / output port 13a to the engine to function as a radiator.

On the other hand, in the oil cooler 1 with a built-in radiator, the oil of the high-temperature transmission device or power steering device that flows into the header 5 from the input / output port 14 flows into the distribution space R, the first distribution space R1, After flowing through the second distribution space R2 and flowing into the header 6, the heat is exchanged with the low-temperature distribution medium of the radiator tank 13 and cooled, and then discharged from the input / output port 15 to the transmission device or the power steering device. Functions as an oil cooler.
At this time, the heat exchange of the oil is promoted by the inner fins 7 accommodated in the flow spaces R of the element portions 2 and 3.

  Here, in the conventional invention, when the dimension in the longitudinal direction of each element portion is increased to reduce the number of stages, there is a problem that the flow resistance of oil increases.

On the other hand, in the first embodiment, oil is circulated through the first circulation space R1 provided in the connecting portion 8 of each element part 2, 3 and the second circulation space R2 provided at both ends in the width direction. The flow resistance can be greatly reduced, and thereby the length of each element portion 2 and 3 in the longitudinal direction can be reduced.
The decrease in the distribution resistance is due to the fact that no inner fin is disposed in the first distribution space R1 and the second distribution space R2.

  Therefore, the front-rear direction width W1 (see FIG. 5) of the radiator tank 13 can be made compact while exhibiting the cooling performance equivalent to that of the conventional oil cooler with only two stages of the element portions 2 and 3.

The heat exchanger 4 of the radiator built-in oil cooler 1 according to the first embodiment is composed of two stages of element parts 2 and 3, but the number of stages can be set as appropriate if the number of stages is two or more. These dimensions can also be set as appropriate.
In the first embodiment, the structure includes both the first distribution space R1 and the second distribution space R2. However, only one of them may be provided according to the required specifications for heat exchange performance and distribution resistance. .

Next, the effect will be described.
As described above, in the radiator built-in oil cooler 1 according to the first embodiment, the heat exchanging portion is composed of the element portion 2 (3) in which the inner fins 7 are accommodated in the internal circulation space R in multiple stages. In the oil cooler 1 with a built-in radiator 4, adjacent element parts 2 and 3 are integrally connected by connecting parts 8 over the longitudinal direction, and oil can flow through the connecting parts 8 in the longitudinal direction. Since the first flow space R1 is provided, the element portions 2 and 3 can be formed long without increasing the oil flow resistance, and the radiator tank 13 can be reduced in size.

  Further, since the second circulation space R2 through which oil can circulate in the longitudinal direction is provided at both end portions in the width direction of the element portions 2 and 3, in addition to the above effects, the oil circulates biased to the first circulation space R1. There is no risk of this, and the oil can flow in a well-balanced manner, which is preferable.

Example 2 will be described below.
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, the description thereof will be omitted, and only differences will be described in detail.

  FIG. 6 is a diagram illustrating an oil cooler 1 with a built-in radiator according to a second embodiment of the present invention.

  As shown in FIG. 6, the radiator built-in oil cooler 1 according to the second embodiment is provided with a partition portion 8 a inside the connecting portion 8, thereby communicating with the circulation space R of each element portion 2, 3. The point from which one distribution space R3, R4 is provided over the longitudinal direction differs from Example 1. FIG.

  Therefore, in addition to the effects described in the first embodiment, the oil flowing through the element portion 2 and the oil flowing through the element portion 3 can be flowed completely independently. Distribution resistance can be stabilized.

Example 3 will be described below.
In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only the differences will be described in detail.

  FIG. 7 is a view for explaining an oil cooler with a built-in radiator according to a third embodiment of the present invention.

  As shown in FIG. 7, the radiator built-in oil cooler 1 according to the third embodiment has a pair of square-shaped first coolers in a connection portion 8 that is not in communication with the flow space R of each element portion 2, 3. The difference from the first embodiment is that one distribution space R5, R6 is provided in the longitudinal direction.

  Therefore, in addition to the effects described in the first embodiment, the oil can flow into the first circulation spaces R5 and R6 independently of the oil flowing through both the element portions 2 and 3, Oil flow resistance can be stabilized.

  In addition, about the formation number, shape, and formation position of 1st distribution space R5, R6, it can set suitably.

Example 4 will be described below.
In the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only the differences will be described in detail.

  FIG. 8 is a top view of the header of the oil cooler with a built-in radiator according to the fourth embodiment of the present invention, FIG. 9 is a cross-sectional view illustrating the fixing of the heat exchanging portion and the header according to the fourth embodiment, and FIG. It is sectional drawing in S10 line.

  As shown in FIGS. 8-10, in the radiator built-in oil cooler of the fourth embodiment, the length L2 from the opening end to the side wall of the fixing hole 9b is inserted into the insertion hole 9a described in the first embodiment (see FIG. 9). A pair of spacer portions 21 and 22 projecting inward from both sides in the width direction are provided, and are inserted and fixed in a state where the element portions 2 and 3 and the communication portion 8 are fitted to both the spacer portions 21 and 22. .

  Therefore, when the end portions of the heat exchange portions 4 are inserted into the insertion holes 9a of the corresponding headers 5 and 6, respectively, and connected to each other, the element portions 2, 3 and the communication portion 8 are fitted to the spacer portions 21, 22. While being inserted, the insertion allowance L1 is regulated by the tapered portion 20 and can be fixed at an appropriate position.

  Moreover, since both the spacer parts 21 and 22 are formed longer than the insertion allowance L1 of both the element parts 2 and 3 and the communicating part 8, the oil is rectified and smoothly flows into the header 6 from the heat exchange part 4. be able to.

  In the first embodiment, since both spacer portions 20 and 21 are extended to the side wall of the fixing hole 9b to which the output port 15 is connected, the oils of both element portions 2 and 3 are joined together in a wide space. A sudden increase in distribution resistance can be prevented.

  Furthermore, since the spacer portions 20, 21 are formed in a straight line, the oil flow resistance does not increase, which is preferable.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.
For example, the connecting portion 8 does not necessarily have to integrally connect the center portions in the width direction of the element portions 2 and 3 and can be integrally connected at an appropriate position. Further, the number of connections is not limited to one.

  In the present embodiment, the heat exchanging portion 4 (element portions 2 and 3) is integrally formed, but a pair of dish-shaped shells are stacked in the middle like the conventional invention, and each element portion 2, In this case, the header may be omitted, and the connecting portion may be formed integrally with at least one side of adjacent element portions and connected to the other side.

  Further, in the fourth embodiment, both the spacer portions 20 and 21 are provided to extend to the side wall of the fixing hole 9b. However, as shown in FIG. 11, the spacer portions 20 and 21 may be extended to just before the side wall hanging on the fixing hole 9b. good.

It is a disassembled perspective view which shows the oil cooler for radiators of Example 1 of this invention. It is sectional drawing in the S2-S2 line | wire of FIG. It is sectional drawing in the S3-S3 line | wire of FIG. FIG. 3 is a rear view of the radiator in which the radiator built-in oil cooler according to the first embodiment is built. It is sectional drawing in the S5-S5 line | wire of FIG. 4, and is a figure explaining an effect | action. It is a figure explaining the oil cooler 1 for radiator incorporation of Example 2 of this invention. It is a figure explaining the oil cooler 1 for radiator incorporation of Example 3 of this invention. It is a top view of the header of the oil cooler for radiators of Example 4 of the present invention. It is sectional drawing explaining fixation of the heat exchange part of this Example 4, and a header. It is sectional drawing in the S10-S10 line | wire of FIG. It is sectional drawing explaining fixation of the heat exchange part and header of another Example.

Explanation of symbols

R distribution space R1, R3, R4, R5, R6 1st distribution space R2 2nd distribution space S1, S2, S3 Seal member 1 Oil cooler 2 with built-in radiator 3, 3 Element part 4 Heat exchange part 5, 6 Header 7 Inner fin 8 Connecting portion 8a Partition portion 9a Insertion port 9b Fixing hole 9c Female screw hole 9d, 9e Seal groove 10 Radiator 11 Core portion 11a, 11b Tube plate 11c Tube 11d Fin 11e, 11f Reinforce 12, 13, Radiator tank 12a, 13a (Radiator Input / output port 13b Rear side wall portions 13c, 13d Through holes 14, 15 (of radiator tank) Input / output port 16 (of radiator cooler) Adapter 16a (Adapter) through holes 16b, 16c Arm portion 17 Bolt 17a Male thread groove 18 Seat 20 Taper 2 , 22 spacer

Claims (6)

In the oil cooler with a built-in radiator including a heat exchanging portion in which the element portion in which the inner fin is accommodated in the internal distribution space is formed in multiple stages,
The adjacent element portions are connected to each other at the connecting portion in the longitudinal direction, and are integrally formed.
An oil cooler with a built-in radiator, wherein the connecting portion is provided with a first circulation space through which oil can circulate in the longitudinal direction. In the oil cooler for a radiator according to claim 1,
A radiator built-in oil cooler characterized in that a second circulation space through which oil can circulate in the longitudinal direction is provided at both ends in the width direction of each element part. The oil cooler with a built-in radiator according to claim 1 or 2,
An oil cooler with a built-in radiator, wherein oil in at least one of the adjacent element portions is circulated in the longitudinal direction in the first circulation space. In the radiator built-in oil cooler in any one of Claims 1-3,
An insertion hole to which the end of the heat exchange part is connected in communication, and a header provided with a fixing hole orthogonal to the insertion hole and connected to the input / output port through the radiator tank;
The insertion hole is provided with a pair of spacer portions protruding inward from both sides in the width direction over a predetermined length from the opening end thereof, and the heat exchanger with the element portion and the communication portion fitted to both the spacer portions. An oil cooler with a built-in radiator, characterized by inserting and fixing the end of the radiator. In the oil cooler for a radiator according to claim 4,
An oil cooler with a built-in radiator, wherein the spacer portion is formed longer than an insertion margin at an end of the heat exchange portion. The oil cooler with a built-in radiator according to claim 4 or 5,
An oil cooler with a built-in radiator, wherein the spacer portion is formed in a straight line.

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