JPS6273089A - Heat exchanger - Google Patents

Abstract

PURPOSE:To reduce the weight and size of the whole of a heat exchanger, by a method wherein a heat exchanger, cooling lubricating oil for an internal combustion engine for a car by means of cooling water, has structure such that it can be mounted independently to an engine block by means of a mounting bolt with a built-in bypass valve. CONSTITUTION:A heat exchanger unit 10 is partitioned by a pair of plates in which an incoming hole 17, a communicating hole 16, and a through-hole 15 are formed. A first space C, a second space B, and a through-space A are formed in a case 25 by positioning the incoming hole 17, the communicating hole 16, and the through-hole 15 of a heat exchange unit 10. Lubricating oil flows in a flow pass 33 and a branch flow pass 34 of a bolt 32 through a first oil pass 41 of an engine block 40 and in the first space C through an oblong hole 29a of a mounting mount 29. The lubricating oil flowing through the first space C into each heat exchanger 10 flows circumferentially along the outer periphery of a collar 20. After the lubricating oil is heat-exchanged with cooling water in a space 26, it flows through the communicating hole 16 into the second space B. The lubricating oil so cooled is returned through a hole 29c of the mounting mount 29 to a second oil pass 42.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat exchanger, and is effective when used, for example, as an oil cooler that cools lubricating oil and cooling water of an automobile internal combustion engine by exchanging heat. .

[Conventional technology]

When this type of oil cooler is attached to an engine block together with an oil filter, it is usually attached to the engine block separately using a mounting device consisting of a mounting bracket or a connecting flange. or,
The oil filter is mounted coaxially above the oil cooler, and both are integrally attached to the engine block using mounting bolts (for example, Japanese Patent Publication No. 55-4
No. 8238, etc.), and even those in which the oil cooler and oil filter are mounted facing each other on the engine block using a mounting bracket (for example, Japanese Utility Model Publication No. 59-3).
No. 6650).

[Problem that the invention seeks to solve]

All of the above-mentioned devices require a mounting device and a mounting bracket, have a large number of parts, and have the drawback of requiring a large installation space in the engine room. Furthermore, since a bypass valve that bypasses the oil in the event of a failure due to clogging of the oil cooler is built into the mounting device and the mounting bracket, there is a problem in that the lubricating oil flow path is complicated.

The present invention has been proposed in order to solve the above-mentioned problems.The present invention has a simple structure in which the heat exchanger can be attached to the engine block by itself using mounting bolts, and a bypass valve is provided in the mounting bolts. Our goal is to provide a compact heat exchanger with a built-in heat exchanger.

[Means for solving problems]

In order to achieve the above object, the present invention provides a heat exchanger unit defined by a pair of plate members in which an inflow hole, a communication hole, and a through hole are formed;
A first space, a second space, and a through space formed by stacking a large number of inflow holes, communication holes, and through holes of the heat exchange unit in the case, and a first flow path of the engine lock, and the first flow path of the engine lock. A third passage communicating with the first space is formed, and a mounting mount for coupling the heat exchange unit to the engine block, fixing the heat exchange unit and the mounting mount, and connecting the second space and a third ijT circuit. a mounting bolt formed with a bypass passage communicating with the
The first space or the third space is built in the mounting bolt.
The present invention is characterized by comprising a bypass passage that opens the bypass passage when the pressure in the passage becomes equal to or higher than a predetermined value.

〔Example〕

Next, one embodiment of the present invention will be described. 10 is a heat exchange unit made of ring-shaped stainless steel. 2nd brake) 11
．． Tighten the outer periphery of No. 12 and form it.

First, the configuration of the heat exchange unit 10 will be explained. Second
The figure is a top view of the heat exchange unit IO, FIG. 3 is a sectional view thereof, and FIG. 4 is a bottom view thereof.

Play) There are two convex parts near the center of 11.12.13.
14 is provided, and the convex portion 13 is provided with a through hole 15. A communication hole 16 is formed, and an inflow hole 17 is formed in the convex portion 14. Folding claws 18 shown in FIGS. 3 and 4 are provided at two locations on the inner periphery of the through hole 15 of the second plate 12.
2 is bent toward the inside of the unit 10, and is located on the opposite side to the inflow hole 17. Furthermore, on the inner periphery of the through hole 15 of the first plate 11, there are locking portions 19 at three locations.
is formed to protrude upward. Further, a flange portion 17a having an L-shaped cross section and projecting vertically downward is formed at the periphery of the inlet hole 17 of the second plate 12.

Such a first plate 11. The heat exchange unit 10 is constructed by aligning the respective holes of the second plate 12, placing the collar 20° heat exchange fins 21 together with the brazing material therebetween, and squeezing the peripheral edges of the plates 11 and 12 together.

Note that the first plate 11 and the second plate 12 have protruding parts 11a and 12a that protrude from the inside of the unit 10 to the outside.
are formed in six locations. The collar 20 has a substantially C-shape with a part of the ring shape cut out, and both ends of the C-shape abut against the folding claws 18 to be positioned.

As shown in FIG. 5, a plurality of the heat exchange units 10 described above are stacked in a case 25 to constitute an oil cooler. Each heat exchange unit 10 has a through hole 1 in its first plate 11.
The through hole 15 of the unit 10 adjacent to the locking portion 19 on the inner circumference of the second plate 12 and the flange portion 17a of the peripheral edge of the inflow hole 17 of the second plate 12 are fitted to the inflow hole 17 of the adjacent unit 10. This allows easy positioning. The through hole 15 and the communication hole 17 communicate with each other to form a through space A, a second space B, and a first space C, respectively. Further, between each heat exchange unit 10, there is a space 26 formed by abutting the protrusions 11a, 12a of the plates 11.12, and this space 26 is filled with cooling water.

Reference numeral 27 denotes a washer provided on the outer periphery of the hole 25a at the center of the upper part of the case 25, and comes into contact with a flange portion of a mounting bolt 32, which will be described later. Reference numeral 28 denotes a lower case that is connected to the lower opening periphery of the case 25, and has a burlin hole 28a communicating with the through space A and holes communicating with the spaces B and C in the center.

29 is a mounting mount when installing the oil cooler to the engine block, and the mounting mount 29 is the through space A.
A single elongated space 29a communicating with the first space C is formed,
Further, a hole 29b communicating with the second space B is formed.

Further, a plate 30 having a seal ring 31 provided on its outer periphery is fixed to the lower part of the mounting mount 29.

Next, the mounting bolt 32 will be explained based on FIG. A channel 33 is formed in the center of the bolt 32 from below to above, and branch channels 34 are formed in the radial direction. Further, two wooden pins 35 are press-fitted into predetermined positions from the sides of the bolts 32. Channel 33 above pin 35
A valve body 37 that is urged downward by a spring 36 is slidably provided inside. Normally, the valve body 37, which serves as this bypass valve, contacts the pin 35 to close the valve.
When the pressure received by the valve body 37 exceeds a predetermined value, it moves upward and the flow path 33 and the branch flow path 34 are brought into communication.

The oil cooler described above is connected to the first
As shown in the figure, it is fixed independently without an oil cooler installed. The lower threaded portion 32b of the bolt 32 is screwed to the threaded portion of the engine block 40, and the flange portion 32b is screwed to the threaded portion of the engine block 40.
a fixes the entire body through a washer 27 of the oil cooler.

Further, the outer periphery of the bolt 32 contacts the burring hole 28a of the lower case 28, and the space between the two is oil-tightly sealed.

The operation of the above configuration will be explained. In FIG. 1, the lubricating oil that has reached a high temperature in the lubricating part of the internal combustion engine is transferred from the first oil passage 41 of the engine block 40 to the passage 33 of the bolt 32 of the oil cooler, the branch passage 34, and the elongated hole of the mounting mount 29. It flows into the first space C in the multiple units 10 from 29a. The lubricating oil that has flowed into each heat exchange unit 10 from the first space C flows circumferentially inside each heat exchange unit 10 along the outer periphery of the collar 20 as shown by the arrow in FIG. After exchanging heat with the cooling water inside, it flows into the second space B through the communication holes 16 of each unit. The lubricating oil thus heat exchanged and cooled passes through the hole 29b of the mounting mount 29 and flows through the second oil passage 4 of the engine block 40.
Return to 2.

If clogging or the like occurs within the heat exchange unit 10, the oil flow resistance within the unit 10 increases, and the pressure in the elongated hole 29a of the mounting mount 29 or the first space C rises.

Then, when the pressure exceeds a predetermined value, the valve body 37 moves upward to open the valve, and the flow path 33 of the bolt 32 communicates with the branch flow path 34 . Therefore, the oil in the elongated hole 29a of the mounting mount 29 is bypassed to the second space B and the second oil passage 42 of the engine block 40 via the branch passage 34 and the notch of the collar 20.

In the above embodiment, lubricating oil flows into the oil cooler from the first oil passage 41 of the engine block 40, but conversely, lubricating oil flows into the oil cooler from the second oil passage 42. You may also do so. However, at this time, since the pressure of the second space B is applied downward to the valve element 37 built into the mounting bolt 32, the valve opens in the opposite direction to the valve element 37 described above, that is, when pressure is applied downward. It is a structure.

In the heat exchange unit 10 described above, a collar 20,
Since no other parts other than the heat exchange fins 21 are required,
It can be made to have a structure that is extremely similar to that of a front-end vehicle, and is also excellent for mass production. Further, it is also possible to prevent oil flow resistance from increasing within the unit 10.

Since a bypass valve is not provided in the oil cooler section where the units 10 are stacked, it is possible to have a compact and simple structure. Even if a failure occurs, it can be easily replaced.

[Effects of the Invention] As described above, according to the present invention, a compact heat exchanger can be installed independently, so that the space in the engine compartment of a vehicle can be used effectively. Also,
The structure has a built-in bypass valve inside the mounting bolt, so
In the event of a bypass valve failure or when checking the function of the bypass valve, it can be easily replaced or removed.
There is no need to install a bracket with a built-in bypass valve between the engine block and the heat exchanger, as is the case in the past.
This has the excellent effect of reducing the weight of the entire heat exchanger.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the heat exchanger of the present invention fixed to an engine block, Fig. 2 is a top view of the heat exchange unit, Fig. 3 is a sectional view of the heat exchange unit, and Fig. 4 is a bottom view of the heat exchange unit, Figure 5 is a sectional view of the heat exchanger, and Figure 6 is a sectional view of the heat exchanger.
The figure is a sectional view of the mounting bolt. 10... Heat exchange unit 11... First plate 1
2... Second plate 15... Through hole, 16...
Communication hole, 17... Inflow hole, 20... Collar, 29.
...Mounting mount, 29a...Elongated hole, 37...Valve body, 40...Engine block, 41...First oil path,
42...Second oil road. A... Penetration space, B... Second space, C... First space. Representative Patent Attorney Takashi OkabeFigure 1Figure 2Figure 3Figure 4Figure 5Figure 6

Claims (1)

[Claims] A heat exchanger unit partitioned by a pair of plate members in which inflow holes, communication holes, and through holes are formed; A third passage is formed that communicates the first space, the second space, and the through space formed in a stacked manner, and the first flow path of the engine lock and the first space, and
a mounting mount that couples the heat exchange unit to the engine block; a mounting bolt that fixes the heat exchange unit and the mounting mount and has a bypass passage that communicates the second space with the third passage; A heat exchanger comprising a bypass passage built into a bolt and opening the bypass passage when the pressure in the first space or the third passage reaches a predetermined value or more.