JPH04278191A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide the structure of heat exchanger, obtaining excellent heat transfer efficiency and securing heat dissipating effect. CONSTITUTION:A heat exchanger is characterized in a constitution wherein a heat dissipating member 11 is provided with notched parts 11g, formed on a sheet material, an interposing unit 10a, interposed between side surfaces 10b of neighboring tubes 10, and a connecting unit 11b, connecting the interposing units and having a bellows type configuration having an elastic force, while the tubes 10 are inserted into the nitched part 11g to contact the interposing part 11a with the side surfaces 10b of the tubes 10 and the bellows type connecting unit 11b is contacted with the upper surface 10a of the tube 10.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger mainly used for cooling a heat medium such as a liquid.

0002

2. Description of the Related Art Conventional heat exchanger structures include those shown in FIG. 6 as an example, and as shown in FIGS. 7 to 9 as other examples. That is, in the heat exchanger shown in FIG. 6 as described in Japanese Patent Publication No. 59-41111, etc., a plurality of disc-shaped heat radiating plates 1 are used as heat radiating members. The heat dissipation plate 1 is provided with a tube insertion port 2 corresponding to several flat tubes 3, 3, and each tube 3, 3 is inserted into the tube insertion port 2, and the tube insertion port 2 is inserted into the side surface of the tube 3. It is in contact with the heat dissipation plate 1. Both ends of each tube 3, 3 are supported by a tube holder 4.

The heat of the heat medium H passing through the tube 1 is transferred from the tube 1 to the heat radiating plate 1, and is cooled and radiated by the gas A that comes into contact with the heat radiating plate 1.

[0004] Another conventional heat exchanger is disclosed in Japanese Patent Application Laid-Open No.
A device shown in FIG. 7 or 9 as described in Japanese Patent No. 7470 and the like is also known. In this heat exchanger, tubes 3 tapered downward in FIG. 9 are arranged side by side at a predetermined interval. A plate-shaped heat dissipating fin 5 is interposed as a heat dissipating member in a meandering manner between each of the tubes 3, 3, and the bent portion 5b of the heat dissipating fin 5 is brought into contact with the side surface 3a of each tube 3, 3. I'm letting you do it. The heat dissipating fins 5 are fixed between the tubes 3 by applying brazing or the like to this abutting portion. Combinations of such radiation fins 5 and tubes 3 are alternately repeated to form a cylindrical heat exchanger.

By passing the heat medium H through the tube 3, the heat of the heat medium is transferred to the heat radiation fins 5, and is cooled and radiated by the gas A that comes into contact with the heat radiation fins 5.

[0006]

However, in the heat exchanger shown in FIG. 6, since a plurality of tubes 3 are inserted into a plurality of tube insertion openings 2 formed in a heat dissipation plate 1, the heat exchanger shown in FIG. The tube 3 is inserted into the tube insertion port 2 with some margin. For this reason, there are portions where the tube 3 does not reliably come into contact with the heat dissipation plate 1, and there is a possibility that a sufficient heat dissipation effect may not be ensured.

Furthermore, in the conventional examples shown in FIGS. 7 to 9,
The radiation fins 5 do not come into contact with the upper surface part 3b of the tube 3,
It contacts only the side surface 3a of the tube 3. For this reason, the area of the portion where the tube 3 is in contact with the radiation fin 5 is limited. Therefore, in this conventional example as well, there is a possibility that a sufficient heat dissipation effect cannot be ensured, similar to the heat exchanger shown in FIG. 6 above.

[0008] Accordingly, an object of the present invention is to provide a heat exchanger that obtains good heat conduction efficiency and ensures a heat dissipation effect.

[0009]

[Means for Solving the Problems] The present invention has been made in view of this problem, and involves arranging a plurality of flat tubes in parallel at a predetermined interval so that their sides face each other, and disposing the tubes between the tubes. A heat exchanger in which a plate-shaped heat radiating member is brought into contact and interposed so that the heat of the heat medium passing through the tube is dissipated by the heat radiating member, wherein the heat radiating member has a notch formed in the plate material. , an intervening part interposed between the side parts of the adjacent tubes, and a bellows-shaped connecting part having an elastic force that connects the intervening part, and the tube is inserted into the notch, thereby interposing the intervening part. The heat exchanger is characterized in that the section is in contact with the side surface of the tube, and the bellows-like connecting section is in contact with the top or bottom surface of the tube.

0010

[Function] According to this means, each intervening part that comes into contact with the flat side surface of the tube by inserting the tube into the notch is securely brought into contact with the side surface of the tube by the elastic force of the connecting part. . Moreover, since the bellows-shaped connecting part is in contact with the upper or lower surface of the tube, a wider contact area can be obtained compared to conventional heat exchangers, and heat transfer efficiency is good. .

[0011] Also, since the heat transferred to the heat radiating member is dissipated by the interposed part of the heat radiating member and the bellows-shaped connecting part,
Due to the connection part, the heat radiation effect is improved compared to conventional heat exchangers.

0012

EXAMPLES The present invention will be explained below based on examples.

FIGS. 1 to 5 are diagrams showing embodiments of the present invention.

First, to explain the configuration, in this embodiment,
A plurality of flat tubes 10 are arranged in parallel at predetermined intervals. A heat radiating member 11 is interposed between the tubes 10 and 10 in contact with each tube 10. This heat dissipation member 11 has a plate shape and has a substantially U-shaped intervening portion 11a.
and bellows-shaped connecting portions 11b having elastic force are alternately connected to form a meandering shape as a whole.

Specifically, the corner 11d of the open end 11c of the approximately U-shaped intervening portion 11a and the corner 11d of the intervening portion 11a facing each other with the tube 10 between the intervening portion 11a interposed therebetween.
are connected via a connecting portion 11b. Due to this connection, the entire heat radiating member 11 has a meandering shape.

In this heat dissipation member 11, the interposed part 11a is interposed between the adjacent tubes 10, 10, and the U-shaped open end 11c is in contact with the side surface 10b of the tube 10 held between the interposed part 11a. At the same time, the U-shaped bent portion 11e is in contact with the side surface portion 10b of the adjacent tube 10.

Further, the bellows-shaped connecting portion 11b is in contact with the upper surface portion 10a of the tube 10.

As shown in FIG. 2, the open end 11c of the intervening portion 11a forms a constant angle C with respect to the ridgeline of the bent portion 11e. As shown in FIG. 3, this heat dissipation member 11
By alternately arranging the tubes 10 and 10, a heat exchanger is formed which has a cylindrical shape as a whole because it is set to form a constant angle as described above.

As shown in FIG. 4, this heat dissipating member 11 is manufactured by forming a notch 11g in a plate-like member to form a substantially flat plate in which a flat intervening portion 11a is connected by a bellows-like connecting portion 11b. After that, the bent part 11e is made.
is bent to form a meandering shape as a whole, and the above-mentioned notch 1 is
1g, the interposed part 11a is brought into contact with the side part 10b of the tube 10, and the bellows-shaped connecting part 11b is brought into contact with the upper surface part 10a or the lower surface part 10c of the tube. There is.

Next, the operation of the heat exchanger constructed as described above will be explained.

Now, the heat medium H is passed through the tube 10 to transfer heat to the heat radiating member 11, and the heat is radiated to the outside air A in contact with the heat radiating member 11, thereby cooling the heat medium. At this time, the bent portion 11e comes into contact with the side surface portion 10b, and the open end 11c is caused by the elastic force of the connecting portion 11b to
Furthermore, since the bellows-shaped connecting portion 11b also contacts the upper surface portion 10a of the tube 10, a larger contact area is obtained than in the conventional case by the connecting portion 11b. Therefore, the heat medium inside the tube 10 is cooled not only from the interposed part 11a but also from the connecting part 11b that contacts the upper surface part 10a, and the heat dissipation effect is improved, so that good heat conduction efficiency is exhibited as a whole. I can do it. Moreover, the connecting portion 11b
Since it has a bellows shape, the contact area with the outside air A is large and the heat dissipation effect is also large. In the heat exchanger of this embodiment, the connecting portion 11b is brought into contact with the upper surface portion 10a, but may be brought into contact with the lower surface portion 10c of the tube 10.

Further, in the heat exchanger according to the embodiment of the present invention, the flat tube 10 located between the intervening portions 11a is connected to the connecting portion 1.
It is held from both sides by the elastic force of 0b. Therefore, since the heat dissipating member 11 is held in the tube 10, temporary fixing is performed before brazing, and workability during assembly is improved. Furthermore, even after assembly, since the clamping force is added to the adhesive force of the brazing, a more sufficient holding force can be exerted.

Furthermore, conventionally, as shown in FIG. 9, one heat dissipation fin 5 is required between each tube 3, so as shown in FIG. When using the tube 3, a large number of radiation fins 5 had to be used in accordance with the number of gaps in the tube 3. In this embodiment, the intervening parts 11a are connected as a series of heat radiating members 11 that meander beyond the tubes 10 by the connecting parts 11b that also serve as heat radiators, so even if three tubes 10 are used, only one heat radiator can be used. Member 11
A heat exchanger can be constructed using this. Therefore, even if a cylindrical heat exchanger as shown in FIG. Quantity is enough.

When constructing such a cylindrical heat exchanger, the heat radiating member 11 is bent into an arc shape to match the cylindrical shape formed by the arrangement of the tubes 10, 10. inserted in between. That is, in the heat dissipating member 11, the connecting portion 11b having elastic force is deformed and the entire heat dissipating member 11 is bent in an arc shape and inserted, so that assembly can be easily performed. As described above, since the heat dissipating member 11 has the connecting portion 11b, it can be assembled by changing the overall shape according to the arrangement shape of the tubes 10, 10 to be inserted.

Furthermore, in the conventional heat exchanger shown in FIG. 7, when constructed in a cylindrical shape, the flow path of the tube 3 becomes narrow near the inner circumference, and the flow resistance of the heat medium passing through the tube 3 increases in this part. , there was a risk that the heat conduction efficiency would be deteriorated. In the heat exchanger of this embodiment, as shown in FIG. 2, the open end 11c of the intervening portion 11a is at a constant angle C
Therefore, even if the entire heat exchanger is configured in a cylindrical shape, there is no need to narrow the tube 10 near the inner periphery as in the conventional case. Therefore, the flow resistance of the heat medium passing through the tube 10 is uniform at any position within the tube 10, and the heat conduction efficiency is improved.

FIG. 5 shows a modification of the heat exchanger of this embodiment. In this modification, in addition to the intervening part 21a having a substantially U-shaped cross section similar to the above embodiment, the intervening part 21a has a flat plate shape.
1h is interposed between the tubes 10, 10.
is used. This flat plate-shaped intervening portion 21h has end portions 21c corresponding to the open end 11c at both ends, and this end portion 21c
The corner portion 21i of the outer intervening portion 21a is connected to the corner portion 21d of the outer intervening portion 21a by a connecting portion 21b. With this connection,
The entire heat radiating member 21 has a meandering shape, and even when four tubes 10 are used, the heat radiating member 21 is disposed across the gap between the tubes 10, so it is sufficient to use one heat radiating member 21. In the figure, reference numeral 21e indicates a bent portion, and reference numeral 2
1g is a notch. Note that in this modification, the heat dissipation member 21
Although one plate-shaped intervening part 21a is interposed between the intervening parts 21a having a substantially U-shaped cross section, it goes without saying that the number of intervening parts 21a is not limited to one, and a plurality of intervening parts may be used. In this case, even if a plurality of tubes 10 are used, the heat exchanger can be configured with one heat radiating member 21 by providing plate-shaped intervening portions 21h between the tubes 10.

As described above, according to the heat exchanger of the above embodiment,
It has a high heat dissipation effect and good heat conduction efficiency, and even if multiple tubes 10 are used, the number of parts can be reduced compared to the conventional case where one heat dissipation member is used in one gap. .

[0028]

[Effects of the Invention] As explained above, according to the present invention, the elastic force of the connecting portion allows the intervening portion to reliably abut against the side surface of the tube, and also brings the bellows-shaped connecting portion into contact with the tube. Therefore, the contact area between the tube through which the heat medium passes and the heat radiating member has become wider than in the past. Therefore, the heat transfer efficiency is better than that of conventional heat exchangers. Furthermore, the area of the heat dissipating portion has been increased by providing the bellows-shaped connection portion. In addition, since the connecting portion has a bellows shape, the contact area with the outside air A is large, and the heat dissipation effect can be increased, which is a practically beneficial effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of a heat exchanger according to an embodiment of the invention.

FIG. 2 is a sectional view showing essential parts of a heat exchanger according to an embodiment of the invention.

FIG. 3 is a sectional view showing a cylindrical heat exchanger according to an embodiment of the present invention.

FIG. 4 is a plan view showing a developed state of the heat dissipation member according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a modification of the heat dissipation member according to the embodiment of the present invention.

FIG. 6 is a perspective view showing essential parts of a conventional heat exchanger.

FIG. 7 is a perspective view showing the main parts of another conventional heat exchanger.

FIG. 8 shows the main parts of another conventional heat exchanger, and FIG.
It is a front view seen from the direction.

FIG. 9 is a perspective view showing the main parts of another conventional heat exchanger.

[Explanation of symbols]

10 Tube 10a Top part 10b Side part 10c Bottom part 11, 21 Heat dissipation member 11a, 21a, 21h Intervening part 11b, 21b connection part 11c, 21c open end 11d, 21d Corner 11e, 21e bending part 11g, 21g Notch H Heat medium

Claims (1)

[Claims] Claim 1: A plurality of flat tubes are arranged side by side at a predetermined interval so that their side faces face each other, and a plate-shaped heat dissipating member is interposed in contact with each other between the tubes, and a heat transfer medium passing through the tubes is disposed in parallel. In the heat exchanger in which heat is dissipated by a heat radiating member, the heat radiating member includes an intervening part formed with a notch in a plate material and interposed between side parts of the adjacent tubes, and the intervening part. A bellows-shaped connecting part having elastic force is provided to connect the parts, and when the tube is inserted into the notch, the intervening part comes into contact with the side surface of the tube, and the bellows-shaped connecting part connects the tube. A heat exchanger, characterized in that the heat exchanger is in contact with an upper surface portion or a lower surface portion of the heat exchanger.