JP2002213888A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger where a tube and a tank can be set up efficiently. SOLUTION: In the heat exchanger which is equipped with the tubes 210 for circulating media and a pair of tanks 300, being provided with holes 321 for connecting both ends of the tubes in the longitudinal direction, and performs the heat exchange of the media by the heat conducting to the tubes, the tubes are of flat shape made of plates, and contours A of the longitudinal end faces of the tubes are the same with each other, and they are symmetrical with each other, with the center line being vertical to the width direction of the tubes as the axis of symmetry B, and also they are rotational symmetry, having a two-fold axis C of symmetry.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange system comprising a tube through which a medium flows, and a pair of tanks to which both ends in the longitudinal direction of the tube are connected. About the vessel.

[0002]

2. Description of the Related Art Generally, a heat exchanger such as a condenser or an evaporator in a refrigeration cycle forms a core by alternately laminating a plurality of tubes and a plurality of fins, and connects both ends of the tubes to holes of a pair of tanks. Are connected to each other.

[0003] The medium is taken in from the inlet provided in the tank, passes through the tube while exchanging heat by the heat transmitted to the core, and is then discharged to the outside from the outlet provided in the tank.

[0004]

By the way, the above-mentioned heat exchanger desirably has a structure which can ensure required pressure resistance, heat exchange efficiency, strength and the like and can be manufactured more easily. However, further improvements are required based on these points.

The present invention has been made in view of such circumstances, and has as its object to provide a heat exchanger that can efficiently assemble tubes and tanks with respect to the manufacture of the heat exchanger.

[0006]

The invention described in the first aspect of the present invention comprises a tube through which a medium flows, and a pair of tanks provided with holes for connecting both ends in the longitudinal direction of the tube. In a heat exchanger that performs heat exchange of the medium by heat transmitted to the tube, the tube is a flat plate formed by forming a plate, and the contours of end faces in the longitudinal direction of the tube are the same as each other. And a heat exchanger having a configuration in which the center line perpendicular to the width direction of the tube is a symmetric axis, and a rotationally symmetric configuration having a two-fold axis. According to such a configuration, the tank and the tube Is efficiently assembled, and the production efficiency of the heat exchanger is improved.

[0007] Here, the symmetry is a property of being balanced corresponding to each other. Two equidistant points on a perpendicular line to a certain straight line on opposite sides of the straight line are called symmetrical points with respect to the straight line, and the straight line is called a symmetric axis. When all the points included in the figure have the same symmetry point as the figure, this figure is called a symmetric figure.

That is, according to the present invention, both the contours of the end faces in the longitudinal direction of the tube are the same as each other,
Since it is symmetrical about the center line perpendicular to the width direction of the tube as the target axis, both ends in the longitudinal direction of the tube can be connected to each hole of the tank even if the directions are reversed. .

Further, the rotational symmetry is a property that the figure at the initial position becomes the same every time a figure around a certain axis is rotated by a certain angle. The fixed axis is referred to as a symmetric axis, and a case where the fixed angle during rotation is 180 °, 120 °, 90 °, or the like is referred to as a double axis, a triple axis, a quadruple axis, or the like, respectively.

That is, according to the present invention, since the contour of the longitudinal end face of the tube is rotationally symmetrical having a double axis, the longitudinal end of the tube is rotated by 180 ° with respect to the hole of the tank. It is also possible to connect.

However, the end of the tube can be easily connected to the hole of the tank, and such a configuration is very advantageous in manufacturing a heat exchanger.

As described above, according to the present invention, a flat tube formed by molding a plate is employed, and both end surfaces in the longitudinal direction of the tube have the same profile.
It is important that the contour of the longitudinal end face of the tube is symmetrical with respect to the center line perpendicular to the width direction of the tube as the axis of symmetry, and that the contour of the longitudinal end face of the tube is rotationally symmetric with a double axis. A remarkable effect has been achieved by summing up these constituent requirements.

According to a second aspect of the present invention, in the first aspect, one end of the tube in the width direction is formed by bending the plate at two base points, and the other end is formed by bending the plate at two base points. It is a heat exchanger having a configuration in which the ends of the plate are wound together, and according to such a configuration,
The tubes are reasonably constructed.

That is, it is possible to efficiently secure the above-mentioned symmetry with respect to the contour of the longitudinal end face of the tube.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

The heat exchanger 1 of the present embodiment is a radiator of a refrigeration cycle for in-vehicle air conditioning mounted on an automobile, and is shown in FIGS.
As shown in FIG. 3, a core 200 formed by alternately laminating a plurality of tubes 210 and a plurality of fins 220 through which a medium (that is, a refrigerant) flows, and a pair of tanks 300 to which both ends of the tubes 210 are respectively connected are provided. The heat transfer of the medium is performed by the heat transmitted to the core 200.

Such a refrigeration cycle circulates a CFC-based medium, and a compressor for compressing the medium;
A radiator that cools the compressed refrigerant, an expansion valve that decompresses the cooled refrigerant, and an evaporator that evaporates the depressurized refrigerant are provided. That is, the heat exchanger 1 of the present example, which is a radiator, is a condenser that cools the medium and condenses it from the gas layer to the liquid layer.

The tank 300 is provided with an inlet portion 400 for inflow of the medium and an outlet portion 500 for outflow of the medium.

The medium flows into the tank 300 from the inlet 400, flows through the tube 210 while exchanging heat, and is then discharged from the outlet 500 to the outside of the tank 300.

Each tank 300 has its interior partitioned at predetermined intervals.
It is configured to go back and forth between 00 and a plurality of times.

On the upper and lower sides of the core 200, side plates 600 as reinforcing members are provided. The end of each side plate 600 is supported by the tank 300.

The tubes 210, the fins 220, the tank 300, and the inlet 4 constituting the heat exchanger 1
00, the outlet part 500, and the side plate 600 are integrally formed by assembling respective members formed by molding aluminum or an aluminum alloy, and subjecting the assembled body to heat treatment in a furnace. Prior to brazing in a furnace, cladding of a brazing material and application of a flux are applied to key points of each member.

The tank 300 of the present embodiment has a tank plate 3
10 and the end plate 320 are assembled.

The tank plate 310 and the end plate 320 are formed by cutting and pressing a plate having a required thickness.

The tank plate 310 is a semi-cylindrical member, and the end plate 320 is a member provided with a plurality of holes 321 for inserting and connecting the ends of the tubes 210. The hole 321 of the end plate 320 is
00 are arranged at regular intervals in the longitudinal direction.

The partition plate 33 is provided between the tank plate 310 and the end plate 320 at a predetermined interval.
0 is provided. That is, the edge of the partition plate 320 is connected to the tank plate 310 and the end plate 320.
The end and the inside of the tank 300 are closed and partitioned by a partition plate 330.

The tank plate 310 and the end plate 3
20 is assembled by inserting the end plate 320 between both edges of the tank plate 310. Then, both edges of the end plate 320 are connected to the tank plate 310.
Is brazed to the inner peripheral surface.

Further, bent pieces 311 for holding the end plate 320 are provided at both edges of the tank plate 310.
Are provided in plurality. The bent pieces 311 are arranged at regular intervals in the longitudinal direction of the tank 300.

After positioning the end plate 320 on the tank plate 310, the end plate 320 is fixed by bending the bending piece 311. The bending of the bent piece 311 is performed using a caulking jig or the like.

As shown in FIGS. 3 to 6, the tube 210 of this embodiment is a flat tube made by roll forming a plate made of aluminum or an aluminum alloy. The plate is a brazing sheet in which a brazing material is clad on at least a surface serving as an inner peripheral surface of the tube 210.

A plurality of flow paths 211 through which the medium flows are provided inside the tube 210 in order to obtain a required pressure resistance.

One end 21 of the tube 210 in the width direction
2 is formed by bending a plate at two base points, and on its outer surface, there are provided two curved surfaces 212a and a flat surface 212b located between the two curved surfaces 212a (see FIG. 4). .

On the other hand, the other end 213 in the width direction of the tube 210 is formed by winding the ends of the plate together. Such wrapping is such that one end of the plate is wrapped around the other end. Like the one end 212, the outer surface is provided with two curved surfaces 213a and a flat surface 213b located between the two curved surfaces 213a (see FIG. 5). The ends of the wrapped plate are brazed together.

Further, between one end 212 and the other end 213 in the width direction, a plurality of beads 214 formed by bending a plate inward of the tube 210 are provided.

The bead 214 divides the flow path 211, and in this embodiment, the tops of the opposing beads 214 are brazed (see FIG. 6). Alternatively, the top of the bead 214 may be brazed to a flat portion inside the tube 210.

The outer surface of the tube 210 is formed on the outer surface of the tube 210 in accordance with the tightening of the ends of the plate and the shape of the bead 214.
A groove-shaped recess 215 is formed. However, such a concave portion 215 is extremely small by sizing in roll forming, and is filled with the brazing material melted from the tank 300 or the fins 220 according to the in-furnace brazing, and almost eliminated. You.

FIG. 7 is an explanatory view showing a contour A of the end face of the tube 210 in the longitudinal direction.

The profile A of the longitudinal end face of the tube 210
Are the same as each other, as shown in the figure, are symmetric with respect to the center line perpendicular to the width direction of the tube 210 as the axis of symmetry B, and rotationally symmetric with the two-fold axis C.

That is, since the contours A of the end faces in the longitudinal direction of the tube 210 are the same as each other and are symmetrical with respect to the center axis perpendicular to the width direction of the tube 210 as the object axis B, the longitudinal direction of the tube 210 Can be connected to each hole 321 of the tank 300 even if the directions are reversed.

Furthermore, since the contour A of the longitudinal end face of the tube 210 is rotationally symmetrical with a double axis C, the longitudinal end of the tube 210 is
21 can be connected even if rotated 180 °.

As described above, in the heat exchanger 1 of the present embodiment, the tank 300 and the tube 210 can be efficiently assembled.

In this embodiment, the tank 300 formed by assembling the tank plate 310 and the end plate 320 is employed. Alternatively, a tank formed by rolling a single plate into a cylindrical shape or a tank formed by an extruded member is used. It is also possible.

Further, in this example, the flow path 2
Although the tube 210 which divided 11 was adopted,
You may use the tube which provided the inner fin inside and divided the flow path.

The heat exchanger 1 of this embodiment is a condenser for condensing a medium from a gas phase to a liquid phase.
The configuration of the tube 0 and the tube 210 can be applied to other heat exchangers such as evaporators and radiators of automobiles.

Particularly in recent years, there is a refrigeration cycle employing CO ₂ as a medium, and the pressure inside the radiator exceeds the critical point of the medium due to the use conditions such as the temperature. The critical point is a limit on the high temperature side where the liquid layer and the gas layer coexist, that is, on the high pressure side. And when using as a radiator of such a refrigeration cycle, since the internal pressure becomes very high, the flow path area of the refrigerant in the tank or the tube is reduced or the plate thickness of the plate constituting the tube is increased. By doing so, the pressure resistance of each part is improved.

As described above, according to the heat exchanger of the present embodiment, the tube is a flat plate formed by forming a plate, and the contours of the longitudinal end surfaces of the tube are the same as each other. Since it is symmetric with the center line perpendicular to the width direction of the tube as the axis of symmetry and rotationally symmetric with the two-fold axis, the tank and the tube can be assembled efficiently and the production efficiency of the heat exchanger is improved. be able to.

That is, both ends in the longitudinal direction of the tube are
Connection can be made to each hole of the tank even if the directions are reversed. Also, the longitudinal end of the tube
It can be connected to the hole of the tank even if rotated 180 °.

However, the end of the tube can be easily connected to the hole of the tank.

According to the heat exchanger of this embodiment, one end in the width direction of the tube is formed by bending the plate at two base points, and the other end is formed by winding the ends of the plate. Since it is tightened, the tube can be rationally configured.

That is, the above-mentioned symmetry can be efficiently ensured with respect to the contour of the end face in the longitudinal direction of the tube.

[0051]

The invention described in the first aspect of the present invention comprises a tube through which a medium flows, and a pair of tanks provided with holes for connecting both ends in the longitudinal direction of the tube. In a heat exchanger that performs heat exchange of the medium by transmitting heat, the tube is a flat plate formed by molding a plate, and the contours of end faces in the longitudinal direction of the tube are the same as each other,
A heat exchanger having a symmetrical configuration with a center line perpendicular to the width direction of the tube as a symmetrical axis and a rotationally symmetrical configuration having a two-fold axis. According to such a configuration, the tank and the tube are efficiently assembled. As a result, the production efficiency of the heat exchanger can be improved.

According to a second aspect of the present invention, in the first aspect, one end in the width direction of the tube is formed by bending the plate at two base points, and the other end is formed by bending the plate at two base points. It is a heat exchanger having a configuration in which the ends of the plate are wound together, and according to such a configuration,
The tube can be rationally configured.

[Brief description of the drawings]

FIG. 1 is a front view showing a heat exchanger according to a specific example of the present invention.

FIG. 2 is an exploded perspective view showing a main part of a tank and a core according to a specific example of the present invention.

FIG. 3 is a perspective view showing a longitudinal end of a tube according to a specific example of the present invention.

FIG. 4 is an explanatory view showing one end in the width direction of the tube according to a specific example of the present invention.

FIG. 5 is an explanatory view showing the other end in the width direction of the tube according to a specific example of the present invention.

FIG. 6 is an explanatory view showing a bead according to a specific example of the present invention.

FIG. 7 is an explanatory view showing a profile of an end face in a longitudinal direction of a tube according to a specific example of the present invention.

[Explanation of symbols]

 Reference Signs List 1 heat exchanger 200 core 210 tube 211 flow path 212 one end in the width direction of tube 212a curved surface 212b flat surface 213 the other end in the width direction of tube 213a curved surface 213b flat surface 214 bead 215 concave portion 220 fin 300 tank 310 Tank plate 311 Bent piece 320 End plate 321 Hole 330 Partition plate 400 Inlet 500 Outlet 600 Side plate A Profile of end face in the longitudinal direction of tube B Symmetry axis C Double axis

Claims (2)

[Claims] 1. A heat exchanger comprising: a tube through which a medium flows; and a pair of tanks provided with holes for connecting both ends in the longitudinal direction of the tube, wherein heat transmitted to the tube exchanges heat with the medium. In the exchanger, the tube is a flat plate formed by molding a plate, and the contours of the end faces in the longitudinal direction of the tube are the same as each other, and a center line perpendicular to the width direction of the tube is formed. A heat exchanger characterized by being symmetrical with respect to the axis of symmetry and rotationally symmetrical with a double axis. 2. One end of the tube in the width direction is:
The plate is bent at two base points,
The heat exchanger according to claim 1, wherein the other end is formed by winding the ends of the plate together.