JPH0443746Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is a plate type oil cooler.
In particular, it relates to a housingless type without a cooling water housing provided on the outer shell.

(Prior Art) A conventional plate type housing type oil cooler is disclosed in, for example, Japanese Utility Model Application No. 59-134755, an example of which is shown in FIG. Flange 21
A plurality of dish-shaped plates 21 having a shape of 1.a are stacked on top of each other, and end plates 22 and 23 are stacked on top and bottom ends to form an oil cooler 20. Each space layer formed by the plate 21 has an oil inlet 24, an oil outlet 25,
A spacer plate 28, which communicates with the water outlet 26 and the water outlet 27, has two through holes 28a and 28b, one of which is closed off from the inside of the space and the other of which is opened to the inside of the space through a notch, is placed every other layer. Different opening holes are provided alternately. And inside there is a fin 29
has been established.

(Problem that the invention aims to solve) In the conventional plate type oil cooler as described above, the interface between the oil and the cooling water is limited to the flat bottom of the plate, so the heat transfer area is wide compared to the volume. It's difficult to do. In order to prevent the flat bottom surface from swelling and deforming due to hydraulic pressure, etc., separate fins must be incorporated to connect the bottom surfaces. Moreover, completely constructing this connection involves considerable difficulty in terms of dimensional accuracy of the parts and control of the brazing process. There are many parts such as fins and spacer plates, which increases the weight, increases the number of assembly steps, and increases the chance of brazing defects. There are various problems such as:

(Means for solving the problem) This invention was made to solve the above problem, and has the following configuration. That is, a rising flange is provided on the periphery, a plurality of rows of recessed slit openings are formed on the top wall of a plurality of parallel protrusions provided on the bottom surface, and one end side of the protrusions on the flat part of the bottom surface is further formed. A plurality of dish-shaped plates with a plurality of through holes on the other end are stacked together by joining their flanges and protruding side walls, and the upper and lower surfaces are respectively covered with end plates. a plurality of oil inlet holes and outlet holes communicating with the slit opening row at one end and the other end of each of the protrusions, and a plurality of water inlet holes and a plurality of water inlet holes communicating with the through holes at one end and the other end of the protrusion, respectively; This is a plate type oil cooler with a water outlet hole.

(Function) The plate type oil cooler of this invention functions as follows. Cooling water enters the oil cooler defined by the flanges of each plate from the water inlet of the end plate. It reaches each layer between the plates through the holes in the bottom of the plate and flows around the ridges within each layer. Since the side walls of the protrusions are joined together, the water flow path is isolated from the inside of the protrusions. The water then flows out from the outlet. On the other hand, oil enters from the oil inlet and enters the inside of the protrusion. The ridges of each layer are joined together by the side wall, and each layer has a slit opening, so the water flows into the ridges of each layer and into the adjacent ridges above and below through the slit openings, and the cooling water flows through the ridges on the side wall. The heat is absorbed and the oil flows out from the oil outlet. The flow of oil to the vertically adjacent protrusions can be appropriately selected depending on the number and shape of the slit openings. Further, as in one embodiment described below, the flow rate can be increased by providing an oil passage hole in addition to the slit opening on the top wall of the convex strip.

(Example) FIG. 1 is a diagram showing the structure of a plate type oil cooler of this invention. The plate 1 has a rising flange 2 on its periphery and a plurality of protrusions 4 on its bottom surface 3. A large number of slits 5 are cut into the top wall of the protruding strip 4, and every other piece of the top wall between the slits is recessed to form a row of slit openings 6. Also, if necessary, a through hole 7 is bored in the top wall. A plurality of through holes 8 are bored in the bottom surface 3. A plurality of the plates 1 described above are stacked one on top of the other, and the rising flanges 2 of each plate and the side walls 9 of the protrusions 4 are sequentially joined. The lower end surfaces of the stacked plates 1 are covered with a non-perforated lower end plate 10, and the upper end surfaces are covered with a plurality of water inlets 11 and water outlets 12.
and an upper end plate 15 having a plurality of oil inlets 13 and oil outlets 14 bored corresponding to the top wall of each row of overlapping protrusions. The upper end plate closes the upper open end of the uppermost plate and is joined to the convex side wall to isolate the water side and the oil side.
Water inlet 11, water outlet 12, oil inlet 13 and oil outlet 14 are indicated by dotted lines 16, 17 and 1, respectively.
As shown at 8 and 19, each group is provided with a gear gallery (not shown) to allow oil and water to flow with the outside.

In addition to the above example, all or part of the water inlet 11, water outlet 12, oil inlet 13, and oil outlet 14 may be provided in the lower end plate 10 as appropriate. Furthermore, the lower end plate 10 can be omitted by eliminating the through hole 8 and slit 5 in the lowermost plate.

Figure 2 shows a cross section perpendicular to the protrusions of the plate type oil cooler, Figure 3 shows the cross section of the protrusions, and Figure 4 shows a cross section of the water flow path along the protrusions. are shown in partial diagrams.

(Effects of the invention) Unlike the conventional housing-less type, the plate type oil cooler of this invention has an oil flow path and a water flow path that are parallel to each other in the same plane and in contact with each other with the protruding side walls. If it is made smaller, the heat transfer area can be increased by the increase in the side wall, making it possible to create an efficient oil cooler with a large amount of heat transfer relative to its volume. In addition, all plates have the same shape,
Furthermore, by joining the convex side walls, the separate fins that were previously required can be omitted, resulting in lighter weight.
It has excellent effects such as reducing the number of parts, reducing assembly man-hours, and making brazing easier and more reliable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of the device according to the present invention, and FIG. 5 is a perspective view showing the conventional component structure. FIGS. 2, 3, and 4 are partial cross-sectional views of the device. 1... Plate, 2... Flange, 4... Protruding strip, 6... Slit opening row, 9... Side wall of protruding strip,
10... lower end plate, 11... water inlet, 12... water outlet, 13... oil inlet, 14... oil outlet,
15...Top end plate.

Claims (1)

[Scope of utility model registration request] A plurality of rows of recessed slit openings are formed on the top wall of a plurality of parallel rows of protrusions provided on the bottom surface, and a plurality of rows of concave slit openings are formed on the top wall of the protrusions provided on the bottom surface. A plurality of dish-shaped plates with a plurality of through holes provided on the other end are stacked together by joining their flanges and protruding side walls, and the upper and lower surfaces are respectively covered with end plates. a plurality of oil inlet holes and outlet holes communicating with the slit opening row at one end and the other end of each of the protrusions, and a plurality of water inlets communicating with the through holes at one end and the other end of the protrusion, respectively; A plate type oil cooler with holes and water outlet holes.