JP2518521Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a heat exchanger for cooling a fluid such as oil.

[Conventional technology]

Conventionally, a heat exchanger has been used to cool various oils such as engine oil, transmission oil, power steering oil, and brake oil.

Further, the heat exchanger normally includes a casing 25 for protecting the core 24 as shown in FIGS. 7 and 8, but the cooling fluid is also introduced into the gap 26 between the casing 25 and the core 24. In some cases, it may try to improve the cooling efficiency.

[Problems to be solved by the device]

However, in the above conventional structure, the water supply pipe 27 and the drain pipe 28
And are closely attached to the casing 25,
The flow of water becomes easier to short-circuit, and the gap 26
However, there is a problem in that the heat transfer performance cannot be improved because the whole of the heat treatment is not spread.

Such a problem may be solved to some extent by disposing the water supply pipe 27 and the drain pipe 28 apart from each other, but it is difficult due to restrictions from the installation location of the heat exchanger.

[Means for solving the problem]

According to the present invention, a superposed body 3 formed by stacking a plurality of cores 2 is wrapped in the casing 5 so as to form a gap 17 between the casings 5, and an empty space 16 is provided in each core 2. The vacant chamber 16 has two rows of through holes 13 penetrating the superposed body 3.
The cores 2 are made to communicate with each other via a and 13b, and another empty chamber 23 is formed between the cores 2. The empty chamber 23 penetrates through the superposed body 3 in two rows of through holes 11a, The cores 2 are communicated with each other through an opening 11b, and an opening 15 is formed at the outer edge of each core 2 so as to allow a void 16 in the core 2 to communicate with the gap 17, and the casing 5 has two types of voids. The heat exchanger has a structure in which holes for letting the cooling fluid or the fluid to be cooled into and out of the holes 16 and 23 are provided corresponding to the through holes 13a, 13b, 11a, 11b.

[Action]

The core acts as a heat exchange part by being housed in the casing.

The fluid to be cooled and the cooling fluid exchange heat while flowing in the void in the core.

Further, one of the fluids, for example, the cooling fluid, flows out from the opening facing the inner wall surface of the casing of the core into the gap between the casing and the core, flows evenly in the gap, and then enters the core from the opening again. It flows toward the discharge pipe or directly reaches the discharge pipe. For this reason, the heat exchange property is enhanced even in the gap.

〔Example〕

An embodiment of the heat exchanger according to the present invention will be described below with reference to FIGS. 1 to 6.

In these figures, reference numerals 1a and 1b represent core members having the same structure, reference numeral 2 represents a core formed by combining the core members 1a and 1b, and reference numeral 4 represents a superposed body 3 in which a large number of the cores are combined into a casing 5 It shows a heat exchanger wrapped with.

 First, the core member 1 will be described.

In the illustrated example, the plate forming the core member 1 has a disk shape, and a circular hole 6 is formed at the center thereof.

Then, the disk-shaped one symmetry axis XX is centered, and a semicircular portion on one side of the disc-shaped symmetry axis XX is slightly exceeded to the center portion around the hole 6 on the other side. A portion is formed as a recess 7 having a flat bottom wall, and a portion extending from the semicircular portion on the other side slightly beyond the axis of symmetry XX to both sides on the one side has a flat top wall. Convex part 8
Is formed as.

The outer edge of the concave portion 7 is formed as a convex edge 9 which is continuous with the upper surface of the upper wall of the convex portion 8 in the same plane.

Further, since the convex portion 8 and the concave portion 7 are formed in this manner, the flange 10 is formed on the peripheral edge of the plate, and the width of the flange 10 is the total thickness of the core member 1. It is set slightly smaller than Sa.

Further, the symmetry axis X is applied to each of the convex portion 8 and the concave portion 7.
Circular through holes 11a, 11b for passing oil as a fluid to be cooled are formed symmetrically with respect to -X, and annular projections projecting in the concave direction of the concave portion 7 are formed on the periphery of the through hole 11b on the convex portion 8 side. 12 are formed.

The annular projection 12 has a cylindrical shape, and the height thereof is the recess 7
Is set to be approximately equal to the depth of.

Circular through-holes 13a, 13b for passing water as a cooling fluid are provided at two locations of the convex portion 8 that intersect with the axis of symmetry XX.
Are formed.

A plurality of core members 1 having the same structure are prepared,
Two of them are combined as follows to form the core 2.

That is, as shown in FIG. 1, the core member 1a is
The other core member 1b having the same structure, which is inverted around the axis of symmetry XX, is superposed so that the back surfaces of the recesses 7 around the center hole 6 are in close contact with each other.
The close contact between the back surfaces is achieved by straddling the peripheral edges of the two holes 6 and fitting the grooves of the annular groove member 14 to each other. Also, by this fitting, two core members are
1a and 1b are integrated.

By thus integrating the two core members 1a, 1b, a vacant chamber 16 is formed between the core members 1a, 1b, which communicates in a stepped state at the central portion. Further, although the lower edges of the flange 10 face each other at the peripheral edge portion, as described above, since the flange 10 is shorter than the thickness of the core members 1a, 1b, an opening 15 is formed between the flanges 10. .

In addition, a through hole 11 for passing the oil to be cooled is provided.
The tips of the annular protrusion 12 of the a and 11b are brought into close contact with the peripheral edge of the other through hole 11a so as to communicate with each other. In the illustrated example, the tip of the annular projection 12 is formed flat, and the flat surface is hermetically joined to the peripheral edge of the other through hole 11a by brazing or the like.

The through holes 13a, 13a, 13b, 13b through which water as the cooling fluid is passed are communicated with each other via the vacant chamber 16 between the core members 1a, 1b.

Although the core 2 alone functions as a core for a heat exchanger, it is preferably used as a heat exchanger by forming a superposed body 3 in which a large number of cores are superposed.

As shown in FIGS. 3 to 5, between the cores 2, the upper surface of the convex portion 8 and the convex edge 9 of the core member 1 and the upper surface of the convex edge 9 and the upper surface of the convex portion 8 coincide with each other. Are overlaid. As a result, the voids 23 are formed between the cores 2 as well.

In the superposed body 3 of the core 2, the annular groove members 14 also serve as spacers, and the annular groove members 14 are in contact with each other as the protrusions 8 and 9 come into contact with each other. The parts are sealed by brazing or the like.

The core superposed body 3 is mounted in the casing 5 of the heat exchanger 4.

The casing 5 has a cylindrical wall 18 surrounding the superposed body 3 with a gap 17 between the casing 5 and the flange 10 of the superposed body 3 of the core 2.
One end of the cylindrical wall 18 is closed by an end plate 19 integrally formed with the cylindrical wall 18, and the other end is closed by a disc-shaped end plate 20 which is a separate body.

The uppermost core member 1a of the superposed body 3 is the one end plate.
The lowermost core member 1b adhered to the inner surface of 19 is the other end plate.
It is glued to the inner surface of 20.

Further, a water injection pipe 21b and a water discharge pipe 21a are fixed to one end plate 19 of the casing 5 so as to correspond to the two rows of the through holes 13a and 13b for passing the water. These tubes
A hose (not shown) is connected to 21a and 21b.

The other end plate 20 of the casing 5 is provided with oil injection holes 22b and discharge holes 22a corresponding to the rows of the two through holes 11 for passing the oil. These holes are
Although not shown, it is directly connected to the oil inlet / outlet of the engine, the transmission, etc.

The cooling of the oil by the heat exchanger 4 having the above-mentioned configuration is performed by the following operations.

That is, the casing 5 is fixed to a predetermined location such as a vehicle, and oil having a predetermined pressure is introduced into the core superposed body 3 through the injection hole 22b. This oil passes through the row of the through holes 11a and 11b on one side in the direction of arrow A,
3 into the other through hole, and the other through hole 1
After passing through the rows of 1a and 11b, it is taken out of the heat exchanger 4 through the discharge hole 22a and returned to the original position of the engine, the mission, etc.

On the other hand, cooling water is injected into the core overlapping body 3 through the injection pipe 21b. While passing through the row of through holes 13b in the direction of arrow B, the water flows into the vacant chamber 16 between the core members 1a and 1b, reaches the other through hole 13a, and drains through the row of through holes 13a. Tube 21
It is taken out of the device from a. In addition, since the annular slit-shaped opening 15 is formed between the flanges 10 at the outer edge portion between the core members 1a and 1b, the cooling water that has flowed into the vacant chamber 16 is discharged from the opening 15 to the inner wall of the casing. It also flows out into the gap 17 between them, and the flange 10 also removes heat. Therefore, the cooling water is used as shown in FIG.
Further, the oil flows evenly in the casing 5, so that the oil cooling efficiency is further enhanced. In addition, core vacancy 16
The water flowing out of the casing 5 to the inner wall side of the casing 5 flows into the empty chamber 16 again from the other opening 15 as shown in FIG.
It reaches the discharge pipe 21a together with the water passing through the through hole 13a.

The cooling water removes the heat of the oil passing through the cavities 23 between the cores 2 through the core wall to cool the oil. As a result, the oil maintains an appropriate viscosity.

After the cooling water is taken out of the heat exchanger 4, it is cooled by, for example, a radiator and returned to the engine or the like.

The heat exchanger of the embodiment can be used for cooling various oils such as mission oil, engine oil, power steering oil, brake oil, etc., but can also be applied to cooling fluids other than oil.

Further, in the embodiment, the cooling fluid is guided to the vacant chamber 16 and the cooled fluid is guided to the vacant chamber 23, but it may be guided to the vacant chambers opposite to each other.

[Effect of device]

According to the heat exchanger according to the present invention, the cooling fluid or the cooled fluid entering the void in the core not only flows from one through hole to the other through hole in the void of the core but also It also flows into the gap between the casing and the core from the opening, flows evenly in the gap, and then flows out of the casing again after entering the void space of the core from the opening, so that the fluid flow is made smoother and stagnation occurs. This has the effect of preventing heat and improving heat exchange.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG. 1 shows I-I in FIG.
2 is a sectional view taken along line II-II in FIG. 4, FIG. 3 is a sectional view taken along line III-III in FIG. 4, FIG. 4 is a plan view of a heat exchanger, and FIG. 5 is a core. FIG. 6 is a perspective view of a core formed by stacking members in a plurality of stages to form a superposed body, FIG. 6 is a perspective view showing the flow direction of the cooling fluid, and FIGS. 7 and 8 are conventional heat exchangers. FIG. 7 is a plan view thereof and FIG. 8 is a vertical sectional view thereof. 1 ... core member, 2 ... core, 3 ... core stack, 4 ...
… Heat exchanger, 5 …… Casing, 10 …… Flange, 11…
… Through hole, 12 …… annular protrusion, 13 …… through hole, 14 …… annular groove member, 15 …… opening, 16 …… vacant room, 17 …… clearance, 21a…
… Discharge pipe, 21b …… Injection pipe, 22a …… Discharge hole, 22b …… Injection hole, 23 …… Vacancy.

Claims (1)

(57) [Scope of utility model registration request] 1. A stack of a plurality of cores is wrapped by the casing so that a gap is formed between the stack and the core. An empty space is provided in each core, and the empty space is the stack. Are communicated with each other through two rows of through-holes that penetrate through the cores, and another void is formed between the cores, and the voids pass through two rows of through-holes that pass through the stack. Are formed so as to communicate with each other, an opening is formed at the outer edge of each core for communicating the voids in the core with the gap, and the casing is provided with a cooling fluid or a cooled fluid for the two types of voids, respectively. A heat exchanger characterized in that holes for taking in and out are provided corresponding to the respective through holes.