JPH0616307Y2 - Core member for heat exchanger, core having the core member as a component, and heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a core member for a heat exchanger, a core having the core member as a component, and a heat exchanger.

[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.

This heat exchanger has a core, and oil and water are separately introduced into the core to cool the oil with water.

And, the core is, for example, JP-A-61-2223213, JP-A-57-31514, and 63-105.
708, 63-121269, 63-
No. 121270, No. 63-121271, No. 63-121273, No. 63-142583, No. 63-159675, it is constructed by stacking a large number of core members in the same direction. Or Japanese Utility Model Publication No. 59-28219, 63-1873.
It is configured by alternately stacking two different core members as shown in Japanese Patent Publication No.

[Problems to be solved by the device]

Among the conventional core members, the former ones are all formed in a dish shape, and these are stacked in the same direction to form an empty space between the core members for filling with oil or the like. Therefore, there is a possibility that the sizes of the vacant spaces between the core members become non-uniform.

Such a drawback can be easily prevented by adopting the latter configuration. However, according to the latter configuration, it is necessary to prepare two kinds of core members having different structures, thus increasing the cost. In addition, the assembly work is complicated because it is necessary to take care not to mix up the core members during assembly.

Further, since all the conventional core members are merely dish-shaped, the contact area with the fluid per core member is small, and the number of core members must be increased accordingly. There is also the problem that

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention provides a plate having a flat bottom wall from a portion on one side of the symmetry axis of a plate having at least one symmetry axis to a portion slightly beyond the symmetry axis to the other side. Is formed as a concave portion having a flat top wall from a portion of the other side to the one side slightly beyond the axis of symmetry, and the outer edge of the concave portion is It is formed as a convex edge that is continuous with the upper surface of the upper wall of the convex portion, and each of the convex portion and the concave portion has a through hole for passing one fluid symmetrically with respect to the axis of symmetry, and the convex portion side. An annular projection is formed on the periphery of the through hole to project in the concave direction of the concave portion, and a through hole for passing another fluid is formed at a portion of the convex portion that intersects with the axis of symmetry. is doing.

Further, as a core configured by using a core member, one heat exchange core member is superposed with another heat exchanger core member having the same configuration and being inverted around the axis of symmetry. The back surfaces of the recesses are brought into close contact with each other, and the through holes for passing one fluid are made to communicate with each other through the annular projection, and the through holes for passing the other fluid also form a space between the core members. It adopts a structure in which they can communicate with each other through.

Further, in that case, a hole is provided in the center of the two heat exchanger cores, and the grooves of the annular groove member are directed and fitted over the peripheral edges of both holes so that the two heat It is also possible to adopt a configuration in which the exchanger core member is integrated.

Further, the annular groove member may also be used as a spacer.

Further, as the heat exchanger configured by using the heat exchanger core, the heat exchanger core may be superposed and the through holes through which the same fluid is passed may be connected to each other. it can.

[Action]

When the heat-exchanger core member is overlapped with another heat-exchanger core member having the same structure as the heat-exchanger core member and inverted around its axis of symmetry, the back surfaces of the recesses of both core members are brought into close contact with each other, The convex portion and the concave portion of one core member face the concave portion and the convex portion of the other core member, respectively, to form a void space between both core members.

Further, the through holes for passing one fluid between the core members are made to communicate with each other through the annular projection, and the through holes do not communicate with the empty space between the core members. But,
The through hole that allows other fluid to pass through communicates with the inside of the chamber.

Both core members can be integrated by welding or the like, but they can also be integrated by striking the grooves of the annular groove member so as to extend over the peripheral edges of both holes in the center of the core.

The core can be used as a core by itself or by connecting with another core.

That is, by making the convex portions and concave portions of one core face the concave portions and convex portions of the other core, respectively, by bringing the same planes of both cores into close contact with each other and integrating them, core members are also provided between both cores. A vacant room similar to the vacant room in between will be formed. The space between the cores communicates with the space between the other cores through the through hole formed by the annular protrusion, and the space between the core members forms the space between the other core members through the through hole on the axis of symmetry. Will be in communication with.

Since the core is housed in the casing, it functions as a heat exchange part of the heat exchanger.

Oil, which is the fluid to be cooled, sequentially moves in the vacant chambers between the cores while passing through the through holes communicating with each other by the annular protrusions. On the other hand, the cooling fluid, for example, water, sequentially moves through the voids between the core members while passing through the through holes on the axis of symmetry.

Heat exchange is performed while these two fluids flow in the core,
The oil will be cooled by the water.

〔Example〕

Embodiments of a core member according to the present invention and a core and a heat exchanger having the member as constituent parts will be described below with reference to FIGS. 1 to 6.

In these drawings, 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. It is formed as a raised portion 8.

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 way, the flange 10 is formed on the peripheral edge of the plate, and the width of the flange 10 is the thickness of the core member 1 as a whole. It is set slightly smaller than Sa.

Further, the symmetry axis X− is formed in each of the convex portion 8 and the concave portion 7.
Circular through holes 11a and 11b for passing oil as a fluid to be cooled are formed symmetrically with respect to X, and an annular projection 12 protruding in the concave direction of the concave portion 7 is formed on the peripheral edge of the through hole 11b on the convex portion 8 side. Are formed.

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

At two points intersecting the axis of symmetry XX of the convex portion 8,
Circular through holes 13a, 13 for passing water as a cooling fluid
b is formed.

A plurality of core members 1 having the same structure are prepared, and two core members 1 are combined as described below to form a 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 fitting the grooves of the annular groove member 14 over the peripheral edges of the two holes 6 so as to be fitted to each other. Further, the two core members 1a and 1b are integrated by this fitting.

By thus integrating the two core members 1a and 1b, a vacant chamber 16 is formed between the core members 1a and 1b, which communicates in a stepped state in the central portion. Further, the lower edges of the flange 10 are opposed to each other at the peripheral edge portion, but since the flange 10 is shorter than the thickness of the core members 1a and 1b as described above, a gap 15 is formed between the flanges 10.
Is occurring.

Also, a through hole 11 for passing oil as a fluid to be cooled
a and 11b, the tip of the annular projection 12 is the other through hole 1
They are closely attached to the peripheral edge of 1a and communicate with each other. In the case of 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.

Through holes 13a, 13a, 13 for passing water as the cooling fluid
The b and 13b are communicated with each other via the void 16 between the core members 1a and 1b.

The core 2 can function as a core for a heat exchanger by itself, but preferably it is 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 upper surface of 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 of the core member 1 are respectively arranged. Overlaid to match. As a result, the voids 23 are also formed between the cores 2.

In the superposed body 3 of the cores 2, the annular groove members 14 also serve as spacers, and the annular groove members 14 are in contact with each other as the protruding portions 8 and the protruding edges 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 includes a cylindrical wall 18 that surrounds 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 the cylindrical wall 18
Is closed by an end plate 19 integrally formed with the other end, and the other end is closed by a disc-shaped end plate 20 which is a separate body.

The core member 1a of the uppermost layer of the stack 3 is bonded to the inner surface of the one end plate 19, and the core member 1b of the lowermost layer is bonded to the inner surface of the other end plate 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 through holes 13a and 13b for passing the water. Hoses (not shown) are connected to these pipes 21a and 21b.

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

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 each row of the through holes 11a and 11b in the direction of arrow A while
It flows into the inner empty chamber 23, reaches the other through-hole, passes through the row of the other through-holes 11a and 11b, and is taken out of the heat exchanger 4 through the discharge hole 22a. Returned to position.

On the other hand, cooling water is injected into the core superposed body 3 through the injection pipe 21b. This water flows through the row of through holes 13b in the direction of arrow B, flows into the void 16 between the core members 1a and 1b, reaches the other through hole 13a, and is discharged through the row of through holes 13a. It is taken out from the pipe 21a. In addition, since the annular slit-shaped gap 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 separated from the gap 15 to the inner wall of the casing. It also flows toward the gap 17 between the flanges 10
Will also be removed by the heat. Therefore, the cooling efficiency of oil is further enhanced. It should be noted that the water that has flowed out of the core empty chamber 16 into the casing 5 again flows into the empty chamber 16 through the other gap 15 as shown in FIG. 6, and together with the water that has passed through the through holes 13a, the drain pipe 21a. Up to.

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 they may be guided in the opposite manner.

[Advantages of the Invention] Since the present invention has the above-described structure and operation, the core can be made by simply superposing one core member with an inverted one having the same structure. Therefore, it is sufficient to make only one type of core member, and it is possible to reduce the manufacturing cost.
As a result, it is possible to easily and quickly assemble the core without fear of mistaking the core members.

Further, since the core is formed by inverting the core members alternately, the voids between the core members and the voids between the cores are formed in a stepped shape. Therefore, a large heat dissipation area can be obtained in a small space, and the contact area with the fluid per core member is large, so that a large cooling efficiency can be obtained with a smaller number of core members. It is a thing.

When the two core members are joined by the annular groove member, the annular groove members can be used as spacers, and the strength against the compressive force of the core can be improved.

Further, the outer edge of the core does not necessarily have to be closed, and in such a case, a slit can be formed therein, and the fluid can be once taken out of the core from the slit and cooled by contact with the inner wall of the casing or the like. Therefore, the manufacturing of the core can be simplified and the cooling effect can be enhanced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view of a core formed by stacking core members in a plurality of layers to form a superposed body, FIG. 2 is a plan view of a heat exchanger, and FIG. Is III in FIG.
-III line sectional view, FIG. 4 is a IV-IV line sectional view in FIG. 2, FIG. 5 is a VV line sectional view in FIG. 2, and FIG. 6 is a perspective view showing the flow direction of the cooling fluid. is there. 1 ... core member, 2 ... core, 3 ... core stack, 4 ...
… Heat exchanger, 5 …… Casing, 6 …… Center hole, 7 ……
Concave portion, 8 ... convex portion, 9 ... convex edge, 10 ... flange, 1
1 ... through hole, 12 ... annular protrusion, 13 ... through hole, 1
4 ... Annular groove member, 15 ... Gap, 16 ... Vacancy, 17
…… Gap, 21a …… Discharge pipe, 21b …… Injection pipe, 22
a: discharge hole, 22b: injection hole, 23: empty chamber.

Claims (5)

[Scope of utility model registration request] 1. A recess having a flat bottom wall is formed in a plate having at least one axis of symmetry from a portion on one side of the axis of symmetry to a portion slightly beyond the axis of symmetry to the other side. The portion extending from the portion on the other side to the one side slightly beyond the axis of symmetry is formed as a convex portion having a flat top wall, and the outer edge of the concave portion is the upper wall of the convex portion. It is formed as a continuous convex edge having the same plane as the upper surface, and each of the convex portion and the concave portion is formed with a through hole for passing one fluid symmetrically with respect to the axis of symmetry, and at the periphery of the through hole on the convex portion side. For a heat exchanger, wherein an annular protrusion is formed to protrude in the concave direction of the concave portion, and a through hole for passing another fluid is formed in a portion of the convex portion that intersects the symmetry axis. Core member. 2. The core member for a heat exchanger according to claim 1,
Another heat exchanger core member of the same configuration, which is superposed with the one inverted around the axis of symmetry, the back surfaces of the recesses are brought into close contact with each other, and the through holes for passing one fluid are A core for a heat exchanger, wherein the cores are made to communicate with each other through the annular projections, and the through holes for allowing passage of the other fluids are also made to communicate with each other through an empty space between the core members. 3. The two heat exchanger cores are provided with a hole at the center thereof, and the grooves of the annular groove member are fitted over the peripheral edges of the holes so that the two heat exchanger cores are fitted to each other. The core for a heat exchanger according to claim 2, wherein the core member for an exchanger is integrated. 4. A heat exchanger having a built-in core in which the heat exchanger cores according to claim 2 or 3 are superposed, and through holes for passing the same fluid are made to communicate with each other. 5. The heat exchanger core according to claim 3, wherein the annular groove member also serves as a spacer.