JPH0344247Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an oil filter with an oil cooler installed in an internal combustion engine or the like.

[Prior Art] In order to install an oil filter and an oil cooler in the oil circulation system of an internal combustion engine, for example, the oil filter 31 and oil cooler 32 shown in FIG.
Oil filter 31 and oil cooler 34 shown in the figure
It is known that they can be mounted one on top of the other. However, in order to make the filter even more compact, there are examples in which the filter is covered with a water jacket and integrated. For example, there is a heat insulating device for a fuel filter described in Japanese Utility Model Application Publication No. 59-22979. In this system, a filter element is housed in a casing, and a water jacket is placed on the outside of the filter casing, which is screwed onto a base with a center bolt.

[Problem to be solved by the invention] The above-mentioned Utility Model Application No. 59-22979 was used to integrate an oil filter and an oil cooler into a compact one.
Although it is possible to use the structure disclosed in the publication, the following problems arise if the structure is used as is.

(1) As oil circulates in the engine and reaches a high temperature, the heat transfer interface between the oil and water is cylindrical, and the cooling capacity of a normal filter casing is insufficient.

(2) Since oil becomes very hot, it is necessary to consider the heat resistance of the filter medium, adhesive, etc. used in the filter element, and to create a structure that allows the oil to enter the filter section after being cooled.

(3) It can be installed in place of the conventionally used disposable oil filter, and when replacing the oil filter or filtration element, it is desirable that the cooling channel system not be affected by water drainage, etc. If a filter is constructed by covering a water jacket with a water jacket, the water jacket must first be removed and the water drained when replacing the filtration element.

[Means for solving the problem] The oil filter with an oil cooler of this invention has the following features:
A first inner wall and a second inner wall are provided in a casing provided with a cooling water inlet hole and an outlet hole, and a first annular chamber and a second annular chamber are provided.
The casing is divided into an annular chamber and a central chamber, the first inner wall is provided with a protruding strip extending circumferentially, the second inner wall is provided with a communication hole, and the upper end surface of the casing is provided with a central chamber opening with a top cover attached. An oil inlet hole that communicates with the second annular chamber and an oil outlet hole that communicates with the central chamber and are threaded are provided on the lower end surface of the filter, and a filter element is housed in the central chamber.

[Operation] In this oil filter, oil enters the second annular chamber through the oil inflow hole and exchanges heat with the cooling water in the first annular chamber. This heat transfer surface is a first inner wall having protrusions arranged in the circumferential direction and has a large area. The cooled oil enters the central chamber through the communication hole in the second inner wall, is filtered, and flows out through the oil outflow hole. When replacing the filtration element, remove the top cover to open the central chamber and replace it. At this time, the first annular chamber, which is the water jacket, is not affected at all. Further, this oil filter with oil cooler can be attached to a conventional disposable oil filter mounting base using the female thread of the oil outflow hole.

[Example] An example of this invention will be explained with reference to FIG.
The oil filter 1 has an upper plate 3 at its upper end and a lower plate 4 at its lower end.
A first inner wall 7 and a second inner wall 8 are provided in a cylindrical shape within a cylindrical casing 2 which is closed with a cooling water inlet pipe 5 and an outlet pipe 6. 2 annular chambers 10 and a central chamber 11
partition into. An oil outflow hole 13 communicating with the central chamber 11 is provided in the center of the lower plate 4, and a female thread is cut into the side wall of the oil outflow hole 13. Further, an oil inlet hole 12 is provided near the periphery, and a gasket 4c is provided on the outer surface of the periphery. An annular inflow chamber 4d partitioned by an annular partition plate 4b is formed inside the lower plate 4, and an oil hole 4e is bored between the second annular chamber 10 and the oil inflow hole 12 into a second annular inflow chamber 4d. It communicates with chamber 10.
The upper plate 3 is provided with an opening 3a on the upper surface of the central chamber 11, and an upper lid 14 is detachably screwed into the opening 3a. 14a is a recessed portion for engaging the attachment/detachment jig, and 14b is an O-ring for sealing. The first inner wall 7 is formed of a bellows-like wall having a plurality of overlapping annular protrusions 7a, and its upper and lower ends are fixed to the upper plate 3 and the lower plate 4. The second inner wall 8 is a cylindrical wall body disposed inside the first inner wall 7, and has a plurality of communication holes 8a formed in a vertical line at positions diametrically opposite to the oil holes 4e.
The annular chamber 10 and the central chamber 11 are communicated with each other. An annular filter element 15 whose inside communicates with the oil outflow hole 13 is housed in the central chamber 11 and is pressed toward the lower plate 4 by a spring 16 . If necessary, fins 17 are provided within the protrusions 7a of the first inner wall 7 for the purpose of heat transfer of oil or reinforcement of the protrusions.

In the above embodiment, as shown in FIG. 4, a gap is provided between the bottom of the protruding strip 7a of the first inner wall 7 and the second inner wall 8, and the oil entering from the lower oil hole 4e is allowed to flow through this gap. It ascends and enters the central chamber 11 through a plurality of vertically arranged communication holes 8a provided in the second inner wall 8 on the opposite side by going around about half the inside of each annular protrusion 7a.

The first inner wall 21 shown in FIG.
1a and a lower plate 21b are fitted together at the rising flanges and stacked to form a plurality of annular protrusions 21c. In this case, the second inner wall 8 is similar to the embodiment described above (FIG. 4).

The other first inner wall 22 shown in FIG. 6 has a protrusion 22a formed in a spiral shape. The oil hole 4e is provided at the lower end of the protrusion 22a, the second inner wall 23 approaches the first inner wall 22 and the distance between the first annular chambers 24 is narrowed, and the communication hole 23a is provided at the lower end of the spiral protrusion 22a. The upper ends are provided at opposing positions. Therefore, the oil is cooled while rising spirally within the protrusion 22a, and enters the central chamber 11 through the communication hole 23a.

[Effects] The oil filter with oil cooler of this invention integrates the oil cooler and oil filter, so it is smaller and the piping is easier, making it convenient to install in narrow spaces such as the engine compartment of a car. In addition, the filter element can be replaced by opening the top cover without removing or attaching the main body, and does not affect the cooling water system path by draining water or the like. Furthermore, when installing it to an internal combustion engine, it can be directly attached to the base on which a conventional disposable oil filter is mounted, and there is no need to modify the engine itself.

Furthermore, this oil filter with oil cooler
Circumferential protrusions are placed around the interface between cooling water and oil, so the heat transfer area is wide and the cooling effect is large.
In addition, the oil is divided so that it first enters the cooling chamber (second annular chamber) and is cooled, and then enters the filtration chamber (center chamber), so the high temperature oil has a negative thermal effect on the constituent materials of the filtration element. There is no decrease in heat resistance even when integrated.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
3 are views showing the installation state of a conventional oil filter and oil cooler, FIG. 4 is a sectional view of the first inner wall in the embodiment of FIG. 1, and FIGS. 1 is a sectional view of an example of an inner wall. 2... Casing, 7, 21, 22... First inner wall, 8, 23... Second inner wall, 9... First annular chamber,
10...Second annular chamber, 11...Central chamber, 14...
Upper lid, 15...filtration element.

Claims (1)

[Scope of utility model registration request] A cylindrical casing with closed upper and lower ends is provided with a first inner wall having protrusions circumferentially arranged therein, and a second inner wall with a communicating hole provided in the wall surface is provided inside the first inner wall to allow the inside of the casing to be exposed to the outside. The casing wall is divided into a first annular chamber, a second annular chamber, and a central chamber, and a cooling water inlet hole and a cooling water outlet hole communicating with the first annular chamber are provided in the casing wall. an oil inflow hole that communicates with the central chamber, and an oil outflow hole that communicates with the central chamber and has a female thread, an opening at the top of the central chamber is provided on the upper end surface of the casing, and a top cover that removably closes the opening is installed; An oil filter with an oil cooler, in which a filtration element is installed in a central chamber, and the inside of the filtration element is communicated with the oil outflow hole.