JPH0356774Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a housingless oil cooler with improved structural strength and sealing performance.

Prior Art Japanese Patent Publication No. 55-48238 discloses a heat exchange structure in which a cylindrical stacked body in which a series of plates are stacked and a water passage and an oil passage are formed between them is arranged in a cylindrical case. equipment is shown. Also, JP-A-61-
Publication No. 223213 discloses a so-called housing-less plate type oil cooler that has a structure in which only thin plates are laminated to serve the function of a casing, and the casing (housing) is eliminated.

Problems that the invention aims to solve While the latter does not have a separate housing and has the advantage of being lightweight, on the other hand,
This brings about the following drawbacks: In other words, this type of oil cooler is used by being tightened and fixed to the engine using a connector pipe provided in the insertion hole in the center. When attached or used in a tightened state, the mounting surface deforms or breaks due to compressive force. In addition, the part where the oil flows in and the part where the cooling water flows in are provided separately and separated, and the seal between them is made by joining plates, but it is difficult to obtain a liquid-tight joint, and the seal It may lead to defects.

Means for Solving the Problems In a housingless type oil cooler having a core in which a water heat exchange chamber and an oil heat exchange chamber are provided between plates and a central passage formed in the center, an oil supply passage and an oil supply passage are provided at the bottom of the core. An oil drain passage, a water guide passage, and a drainage passage are partitioned by partition walls, and an integrally formed cover is fixed thereon, the oil supply passage is communicated with the inlet side of the oil heat exchange chamber of the core, and the oil drain passage is separated. is connected to the outlet side of the oil heat exchange chamber, the water introduction passage is connected to the inlet side of the water heat exchange chamber, and the drainage passage is connected to the outlet side of the water heat exchange chamber.

Function The partition walls of the cover that form the oil supply passage, the oil drainage passage, the water introduction passage, and the drainage passage disperse the compressive force generated when the oil cooler is attached and fixed.
Moreover, each of the passage parts is integrally formed in one cover, and there is no joint surface between them.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to FIGS. 1 to 16.

As shown in FIGS. 1 to 4, the housingless oil cooler 10 of this invention has a core 11 formed by laminating and brazing a large number of plates.
and an upper plate 1 fixed to the upper part of the core 11.
2, and a cover 13 fixed to the lower part of the core 11. An oil filter is fixed to the connector pipe to which the oil cooler 10 is attached to the upper part of the upper plate 12, but the connector pipe 60 is
It is shown in FIG. 16, and the drawing of the oil filter is omitted. The upper plate 12 is provided with an opening 12a forming a supply passage 14 connected adjacent to the oil filter and supplying oil to the oil filter.

As shown in FIG. 5, the cover 13 includes an oil supply passage section 15 forming a part of the supply passage 14, an oil drainage passage section 16 for discharging the oil cooled in the core 11 to the outside, and an oil drain passage section 16 for discharging the oil cooled in the core 11 to the outside. A water guide passage section 17 that introduces cooling water and a drainage passage section 18 that discharges water to the outside are integrally provided.
18 are all fan-shaped. Fuel supply passage section 15
has an inlet 15a and an outlet 15b, the inlet 15
Oil flows into the cover 13 from the outlet 15
Oil flows out into the core 11 from b. In the embodiment of FIG. 5, the cover 13 has a circular cross section;
Four oil supply passages 15 and one oil drainage passage 16
, and one water guide passage section 17 and one drainage passage section 18, respectively. In order to form these passage parts 15 to 18, an oil supply passage part 15 and an oil drainage passage part 16 are formed.
a partition wall 30 between the oil supply passage section 15 and the water guide passage section 17, a partition wall 32 between the oil supply passage section 15 and the drainage passage section 18, and a partition wall 33 between the opposing oil supply passage sections 15. is formed. These partition walls 30 to 33 are formed parallel to the central axis of the cover 13 and prevent the passage portions 15 to 18 from being deformed or crushed when compressive force is applied to the oil cooler 10.

The oil that has flowed into the oil inlet 21 from the oil filter is transferred to the oil inlet 26 of the core 11, the oil inlet 26 of the core 11,
After passing through the oil heat exchange chamber 62 formed between the core plates of 1 and the oil outlet 27, the inlet 16
flows into a. In the oil heat exchange chambers 62, the oil exchanges heat with water flowing in alternately adjacent water heat exchange chambers 63. The oil drain passage 16 has an inlet 16 a into which oil flows from the core 11 and an outlet 16 b that communicates with a central passage 20 provided at the center of the cover 13 . Actually, the center passage 2
0, a connector pipe 60 is fixed by a known method, and the oil coming out of the outlet 16b flows into the connector pipe 60 through a hole (not shown) formed in the connector pipe 60.

The water guide passage section 17 is connected to a water guide pipe 22 that introduces water from the outside.
The inlet passage 23 formed in the core 11 is connected to the inlet side of a water heat exchange chamber 63 formed between the plates of the core 11. As mentioned above, the core 11 has the water heat exchange chambers 63 and the oil heat exchange chambers 62 alternately formed by the core plates, so that when water passes through the water heat exchange chambers 63, it interacts with the oil in the oil heat exchange chambers 62. Perform heat exchange. Water passes from the water heat exchange chamber 63 through the outlet passage 24, flows into the drainage passage section 18, and is then drained to the outside through the drainage pipe 25. Therefore, the drainage passage section 18 communicates with the outlet side of the water heat exchange chamber 63, and the oil supply passage section 15 and the oil drainage passage section 16 communicate with the inflow and outflow sides of the oil heat exchange chamber 62, respectively. I will do it.

The above embodiments of the invention can be modified.
For example, as shown in FIG. 6, the cover 13 has a circular cross section, and includes four oil supply passages 41 to 44 and a substantially half-moon shaped water supply passage 45 formed on the outside of the oil supply passages 41 to 44. and a drainage passage section 46, and an oil drainage passage section 47 formed between the water supply passage section 45 and the drainage passage section 46. The partitions 48 forming these passageways differ from the radially extending radial partitions of FIG. As described above, it can be understood that the number and shape of the oil supply passage, water supply passage, drainage passage, and oil drainage passage formed in the cover 13, as well as the shape of the partition wall, can be changed as desired. Similarly, the mounting positions and shapes of the water guide pipe 22 and the drain pipe 25 can be changed as the shapes and mounting positions of the water supply passage section and the drainage passage section are changed.

FIGS. 7-9 show an example of the core plate 52 forming the core 1 shown in FIGS. 2-4. The core plate 52 has holes 5 forming the supply passage 14.
8, holes 54 and 53 forming oil inlet 26 and oil outlet 27, respectively, and inlet passage 2.
3 and holes 55 and 56 forming the outlet passage 24;
A center hole 57 through which the connector pipe 60 is inserted and an emboss 59 recessed downward are formed. An annular projection 53 is provided around each of these holes 53 to 58.
a, 54a, 55a, 56a, 57a and 58a
is provided. The plurality of core plates 52 have similar shapes in which annular protrusions 53a, 54a, 55a, 56a, 57a, and 58a protrude upward or downward, and vertically adjacent core plates 52 are
It is rotated through a 90° angle and placed and soldered.

FIG. 10 is a detailed sectional view of FIG. 2 showing the oil cooler 10 manufactured according to this invention.
FIG. 11 is a detailed cross-sectional view of FIG. 3. 1st
FIG. 2 is a sectional view showing another embodiment of this invention showing a drain pipe 25. FIG. 13 is a side view of the oil cooler 10 of this invention. FIG. 14 shows still another embodiment of the cover 13 according to this invention. FIG. 15 is a plan view of an oil cooler 10 according to another embodiment of this invention. FIG. 16 is a sectional view of the oil cooler 10 equipped with the connector pipe 60 and sleeve 61. In this way, the oil cooler of this invention can be modified in various ways.

Effects of the invention In this invention, the compressive force generated when installing the oil cooler using the connector pipe is dispersed by forming the oil supply passage, the oil drainage passage, the water introduction passage, and the drainage passage in the cover together with the partition wall. The cover has enough strength to withstand the compression of the oil cooler. In addition, the oil supply passage, the oil drain passage,
Since the water guide passage portion and the drainage passage portion are integrally formed in one cover, the sealing between each passage portion is ensured.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the housingless type oil cooler of this invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 1. Fig. 4 is a sectional view taken along line C-C in Fig. 1, Fig. 5 is a plan view of a cover used in the housingless type oil cooler of this invention, and Fig. 6 is a diagram showing another embodiment of this invention. FIG. 7 is a plan view of the core plate used in the oil cooler of this invention, FIG. 8 is a sectional view taken along line C-C in FIG. 7, and FIG. 10 is a sectional view taken along line G-G in FIG. 15 showing an oil cooler manufactured by this invention, and FIG.
The figure is a sectional view taken along the line E-E in Figure 15, which shows Figure 3 in detail, and Figure 12 shows another embodiment of this invention in which the shape of the drainage pipe is changed.
13 is a side view of the oil cooler of this invention, FIG. 14 is a sectional view taken along line H-H in FIG. 13, and FIG. 15 is an oil cooler of another embodiment of this invention. FIG. 16 is a sectional view of the oil cooler of this invention equipped with a connector pipe and a sleeve. 10...Housingless type oil cooler, 11
... Core, 12 ... Upper plate, 13 ... Cover, 14 ... Supply passage, 15, 41-44 ... Oil supply passage section, 16, 47 ... Oil drain passage section, 17, 4
5...Water conduction passage section, 18, 46...Drainage passage section,
20...center passage, 21...oil inlet, 22...
...Water pipe, 23...Inlet passage, 24...Outlet passage, 25...Drainage pipe, 30-33, 48...
...bulkhead.

Claims (1)

[Scope of utility model registration request] In a housingless heat exchanger having a core with a water heat exchange chamber and an oil heat exchange chamber between the plates and a central passage in the center, an oil supply passage, an oil drainage passage, and a water guide are provided at the bottom of the core. The passage section and the drainage passage section are separated by a partition wall and an integrally formed cover is fixed, the oil supply passage section is communicated with the inlet side of the oil heat exchange chamber of the core, and the oil drainage passage section is connected to the inlet side of the oil heat exchange chamber of the core. A housingless type oil cooler that communicates with the outlet side, has a water introduction passageway communicate with the inlet side of the water heat exchange chamber, and has a drainage passageway communicate with the outlet side of the water heat exchange chamber.