JPH0116947Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a cooling plate that is a constituent unit of a heat exchange section of a water-cooled oil cooler.

(b) Background of the technology A water-cooled oil cooler whose heat exchanger unit is a cooling plate formed by joining a pair of plate materials,
It is used in a wide range of fields including automobiles, but because the oil is distributed through the gaps formed between the plate materials, the oil is concentrated in the areas with low flow resistance, and some parts of the cooling plate are In some cases, heat exchange may only be performed effectively. Therefore, there is a need for the development of a means for equalizing the oil distribution within the cooling plate, effectively exchanging heat throughout the cooling plate, and improving heat exchange performance.

(c) Prior art and problems FIG. 4 shows the general structure of a water-cooled oil cooler in which the heat exchanger unit is a cooling plate formed by joining a pair of plates.

The cooling plate 1 of this water-cooled oil cooler is constructed by joining an upper plate material 1a and a lower plate material 1b.
An oil flow path 2 is formed between a and 1b, and oil collection portions 3 are provided at both ends of the oil flow path 2.
An oil inlet 4 is formed in one of the two oil collecting parts 3, and an oil outlet 5 is formed in the other. By connecting the oil inlet 4 and the oil outlet 5, respectively, the cooling plate 1 are laminated to form a heat exchange section. An inlet pipe 6 is connected to the oil inlet 4 of the cooling plate 1 at the top.
is connected to the oil outlet 5, and an outlet pipe 7 is connected to the oil outlet 5.

This cooling plate 1 uses plate materials 1a and 1b which have been previously processed into a predetermined uneven shape by pressing etc. in order to form the oil flow path 2 and the oil collecting section 3. Even if the oil flow path 2 has a uniform diameter and is continuous, the oil does not always flow evenly. That is, the oil flow resistance is not uniform within the oil flow path 2 due to uneven temperature distribution, viscous oil adhering to the corners, and forming a sticky layer. Therefore, the oil may flow concentrated in areas where the flow resistance is low, and heat exchange may not be performed effectively throughout the cooling plate 1.

Conventional means for solving this problem include those shown in FIGS. 5 and 6, for example.

Fig. 5 is known as Utility Model Application No. 58-154376, in which an upper plate member 1a, a lower plate member 1b, and a cooling plate 1 formed in an elongated shape are arranged in the longitudinal direction of the cooling plate 1. Slanted long groove-shaped recesses 8 are regularly arranged, and the recesses 8 of both plate materials 1a and 1b are
Both plate materials 1a and 1b are joined so that the openings of the plates partially cross each other. According to this conventional example, the oil flow path 2, which is the gap formed by the recesses 8 of both the plate materials 1a, 1b, is not continuous in one direction, but is formed in a zigzag pattern between the recesses 8 of the both plate materials 1a, 1b. Since the oil flowing through the oil flow path 2 is disturbed and diffused throughout the cooling plate 1, it also prevents the formation of a sticky layer of oil or prevents the formed sticky layer. Because of the separation, the oil distribution is equalized and heat exchange is performed effectively throughout the cooling plate 1.

Figure 6 shows Utility Application No. 58-119102 (see Utility Model Application No. 60-27273), which was previously proposed by the present applicant.
For example, one recess 8 of the upper plate 1a is located at the center of three adjacent recesses 8 of the lower plate 1b, and intersecting recesses 8 are set in multiple directions. According to this earlier application, the fifth
Compared to the conventional example shown in the figure, the oil distribution direction, that is, the oil agitation direction, has a wider angle, so that the oil can be distributed evenly within the cooling plate 1 very well.

However, in the above conventional example, the cooling plate 1
It is simply a structure that focuses on one aspect of oil distribution within the country. That is, the uneven distribution of oil is caused not only by the above-mentioned distribution resistance in the oil passage 2 but also by the pressure of the oil applied to the oil inlet 4 and the attractive force applied to the oil outlet 5. For example, oil inlet 4
If pressure is applied to the oil in a particular direction, there is a problem in that completely even oil distribution cannot be achieved even with the above-mentioned disturbance effect.

(d) Purpose of the invention The present invention was devised to solve the problems of the conventional example described above, and its purpose is to eliminate the influence of the pressure applied to the oil inlet and the gravitational force applied to the oil outlet. be.

(e) Structure of the invention In order to achieve the above object, the cooling plate of the water-cooled oil cooler according to the invention consists of a pair of plates each having regularly arranged recesses, and a structure in which the opening blocks of the recesses of both the plates are partially aligned with each other. In the cooling plate of a water-cooled oil cooler, the cooling plate of a water-cooled oil cooler has an oil inlet and an oil outlet bored in the plate material, which are joined to form an oil flow path by intersecting each other, and which communicate with the oil flow path. The recesses are arranged in such a shape that the surface area of the concave portions gradually increases from the shortest part to the longest part of the oil flow path.

(f) Embodiments of the invention Examples of the invention will be described below with reference to FIGS. 1 to 3.

The cooling plate 1 has a circular planar shape, and a through hole 9 is bored in the center portion. The oil collecting section 3 is provided at a position slightly moved from the center line A of the cooling plate 1 at an angle of about 180 degrees. An oil inlet 4 is provided in one of the collecting sections 3, and an oil outlet 5 is provided in the other collecting section 3.

The recesses 8 arranged in the upper plate material 1a and the lower plate material 1b constituting the cooling plate 1 are arranged in the same manner as in the conventional example shown in FIG. They are arranged so that they intersect. Therefore, in addition to providing the oil collecting portion 3 at a position slightly moved from the center line A of the cooling plate 1, for example, if only two upper plates 1a are manufactured and joined on the front and back sides, the recesses 8 will intersect. Therefore, there is an advantage that manufacturing is easy.
Also, as shown in FIG. 3, the cooling plate 1 formed in this way is turned over on one side, and the oil inlet 4,
By connecting the oil outlet 5, stacking can be easily performed.

The recesses 8 are arranged in a shape such that the surface area thereof gradually increases toward the outer circumference of the cooling plate 1. When the concave portions 8 are hemispherical as shown in the figure, the concave portions 8 are arranged in order of increasing diameter.

By arranging the recesses 8 in this manner, the oil flow resistance gradually decreases toward the outer circumference of the cooling plate 1 where the oil flow distance is long, and the oil flows toward the cooling plate 1 where the oil flow resistance is low. It actively circulates towards the outer periphery. Although this distribution form is a contradictory phenomenon from the perspective of equal oil distribution, by actively distributing oil in the outer circumferential direction where the distribution distance is longer, even oil distribution is ensured as a result. This allows effective heat exchange throughout the cooling plate 1. Furthermore, this arrangement of the recesses 8 increases the oil flow resistance in the central portion of the cooling plate 1, where the pressure at the oil inlet 4 and the attractive force at the oil outlet 5 act most strongly. It acts as a buffer against pressure and attraction, promoting even oil distribution.

Furthermore, since the size of the recesses 8 is arranged stepwise in the direction of the outer circumference of the cooling plate 1, the flow resistance of the oil flow path 2 does not change abruptly, but changes step by step, so that the oil It does not remain partially in the flow path 2.

Note that FIG. 2 shows the communication structure between the oil collecting part 3 and the recess 8. By providing the oil collecting part 3 at a position slightly moved from the center line A of the cooling plate 1, the oil collecting part 3 It also partially intersects and communicates with the recess 8.

In the embodiment shown above, the planar shape of the cooling plate 1 is circular, and the oil circulation form is adopted such that the cooling plate 1 is made to go around half a circle. However, the present invention is not limited to this embodiment. It can also be set to 1. In particular, the long cooling plate 1
In this case, a sticky layer of oil is likely to be formed on the edges along the length, so the recesses 8 are arranged in a shape that gradually increases in size from the center to the edges along the length, and oil is applied aggressively to the edges along the length. If it is distributed in a
It is possible to prevent the formation of an oil sticky layer or to peel off the formed sticky layer.

(g) Effects of the invention As described above, the present invention has the advantage that the entire cooling plate can perform effective heat exchange to ensure uniform oil distribution, improving heat exchange performance. Therefore, it is possible to reduce the number of stacked cooling plates, and the size of the container body can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a cooling plate for a water-cooled oil cooler according to the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, and FIG. 3 is a sectional view showing a stacked state of the cooling plates. FIG. 4 is a sectional view showing the general structure of a water-cooled oil cooler, and FIGS. 5 and 6 are plan views showing the shape of a concave portion in a conventional example. 1...Cooling plate, 2...Oil channel, 4...
...Oil inlet, 5...Oil outlet, 8...Recess.

Claims (1)

[Scope of utility model registration request] A pair of plates having regularly arranged concave portions are joined such that the opening blocks of the concave portions of both plates partially cross each other to form an oil flow path, and an oil inlet communicating with the oil flow path is formed. In a cooling plate of a water-cooled oil cooler in which an oil outlet is bored in a plate material, the recess has a shape in which the surface area of the recess gradually increases from a short part to a long part of the oil flow path from the oil inlet to the oil outlet. A cooling plate for a water-cooled oil cooler characterized by an arrangement of the following.