JP4569267B2 - Heat exchanger and manufacturing method thereof - Google Patents

Description

  The present invention relates to a heat exchanger for a cooling system, a heat dissipation system, a heating system, and the like, and more particularly to a liquid and gas heat exchanger used in a system that requires compactness such as information equipment and a method for manufacturing the same. is there.

  Conventionally, this type of heat exchanger is generally composed of tubes and fins. However, in recent years, in order to achieve compactness, the tube diameter and tube pitch are reduced, and the tubes are made dense. It tends to become. As an extreme form thereof, there is one in which the heat exchanging portion is composed only of a very thin tube having a tube outer diameter of about 0.5 mm (for example, see Patent Document 1).

  FIG. 9 is a front view of a conventional heat exchanger described in Patent Document 1. FIG.

  As shown in FIG. 9, the conventional heat exchanger includes an inlet tank 31 and an outlet tank 32 that are arranged to face each other at a predetermined interval, and a plurality of pipes 33 having an annular cross section between the inlet tank 31 and the outlet tank 32. Is arranged, and a core part 34 through which an external fluid flows through the outside of the pipe 33 is configured.

And while arrange | positioning the pipe | tube 33 in square grid shape, the outer diameter of the pipe | tube 33 shall be 0.2 mm or more and 0.8 mm or less, and the value which remove | divided the pitch of the adjacent pipe | tube 33 by the pipe outer diameter is 0.5 or more. By setting it to 3.5 or less, it is said that the amount of heat exchange for the power used can be greatly improved.
JP 2001-116481 A

  Although specific elements and manufacturing methods constituting the conventional heat exchanger are not shown, in general, a large number of thin tubes 33 and a large number of fine holes on a specific surface are previously opened. There is a method in which a tank 31 and an outlet tank 32 are prepared, both ends of the pipe 33 are inserted into the circular holes of the inlet tank 31 and the outlet tank 32, and the insertion portion of the pipe 33 is bonded to the inlet tank 31 and the outlet tank 32 by welding or the like. Conceivable. However, the inlet tank 31 and the outlet tank 32 are provided with fine circular holes for inserting the pipes 33 at a predetermined fine pitch, and a very large number of pipes 33 are inserted into the inlet tank 31 and the outlet tank 32 and bonded. The process is very difficult, and even if the heat exchange performance is high, there is a problem that it is very expensive and has low reliability for leakage.

  The present invention solves the above-described conventional problems, and provides an inexpensive and highly reliable heat exchanger having a structure that is extremely easy to manufacture while maintaining extremely excellent heat exchange performance. With the goal.

In order to solve the above-described conventional problem, the heat exchanger of the present invention includes a tube row composed of a plurality of tubes arranged substantially in parallel on a plane and a plurality of the tube rows stacked at intervals, A plurality of spacers provided between the tube rows in the vicinity of both ends of the tube, and a header having openings that enclose both ends of the tube and are closed by a spacer surface constituted by the spacers stacked simultaneously. The spacer is made of a flexible material, and a partition wall is provided in the header by extending a part of the spacer into the header .

With this configuration, the tube group can be easily configured by alternately stacking the tubes and the spacers. In addition, since the partition wall is provided in the header, the number of fluid paths flowing inside the pipe can be reduced, and the fluid speed can be increased. Further, since the partition wall is configured by extending a part of the spacer into the header, the partition wall can be easily positioned and attached. Further, the sealing force between the spacers, the spacer and the tube, and the sealing property between the spacer and the header can be ensured by the elastic force of the spacer, and sealing with an adhesive or the like can be eliminated.

  In the present invention, the size of the spacer surface is configured to be slightly larger than the size of the opening.

  With such a configuration, the sealing performance between the spacer surface and the opening of the header can be enhanced.

  Moreover, this invention is set as the structure which provided the dent in the surface which contact | connects the said pipe | tube of the said spacer.

  With this configuration, it is possible to facilitate positioning of the pipe installed on the spacer.

  According to the present invention, the size of the recess is slightly smaller than the size of the cross section of the tube.

  With this configuration, the sealability between the spacer and the tube can be enhanced.

  In the present invention, the end face of the opening in contact with the spacer is inclined.

  With this configuration, the work of inserting the spacer surface into the opening of the header can be facilitated, and the adhesion between the spacer surface and the opening can be enhanced.

  According to the present invention, a protrusion or a step is provided on a part of the end face of the opening in contact with the spacer surface.

  With this configuration, the position of the spacer surface can be fixed when the spacer surface is inserted into the opening.

  In the present invention, the tube is an elliptic tube.

  With this configuration, the resistance of the fluid flowing outside the tube can be suppressed.

  In the present invention, the tube or the tube row is a flat tube having a plurality of flow paths therein.

  With this configuration, the number of tubes can be reduced.

  Furthermore, in the present invention, after the tube rows and the spacers are alternately stacked, the spacer surface is inserted into the opening.

  Such a manufacturing method can eliminate the step of inserting both ends of a large number of tubes into fine circular holes.

In the heat exchanger of the present invention, the tube group can be easily configured by stacking the tubes, and therefore the heat exchanger can be manufactured by a very easy process. Also, by providing a partition wall in the header by extending a part of the spacer into the header, the partition wall can be easily positioned and attached, reducing the number of paths of fluid flowing inside the pipe. Thus, the speed of the fluid can be increased, and the heat transfer coefficient between the fluid and the tube can be increased. Further, the sealing force between the spacers, the spacer and the tube, and the sealing property between the spacer and the header can be ensured by the elastic force of the spacer, and sealing with an adhesive or the like can be eliminated.

  In addition, the heat exchanger of the present invention can ensure the sealability between the spacers, the spacer and the tube, and the sealability between the spacer surface and the opening of the header. And the number of manufacturing processes can be reduced.

  Furthermore, the method for producing a heat exchanger according to the present invention can eliminate the step of inserting a large number of tubes into a fine circular hole, and therefore, the heat exchanger can be produced in an even easier step.

According to the first aspect of the present invention, a plurality of tube rows arranged in parallel on a plane and a plurality of the tube rows are stacked at intervals, and the tube rows are arranged near both ends of the tube. a plurality of spacers disposed therebetween, and enclosing both ends of the tube, by which is composed of a header with an opening which is closed by the spacer surface formed by the spacer which is stacked at the same time, the laminated tube By doing so, the tube group can be easily configured, and the heat exchanger can be manufactured by a very easy process. Also, by providing a partition wall in the header by extending a part of the spacer into the header, the partition wall can be easily positioned and attached, reducing the number of paths of fluid flowing inside the pipe. Thus, the speed of the fluid can be increased, and the heat transfer coefficient between the fluid and the tube can be increased. In addition, since the spacer is made of a flexible material, the sealing force between the spacers, the spacer and the tube, and the sealing property between the spacer and the header can be ensured by the elastic force of the spacer. A seal can be dispensed with.

The invention according to claim 2 is the heat exchanger according to claim 1 , wherein the size of the spacer surface is slightly larger than the size of the opening, and the spacer surface and the opening of the header It is possible to enhance the sealing performance.

According to a third aspect of the present invention, in the heat exchanger according to the first or second aspect of the present invention, the surface of the spacer that comes into contact with the tube is provided with a recess, so that the tube placed on the spacer can be easily positioned. Can be.

According to a fourth aspect of the present invention, in the heat exchanger according to the third aspect of the present invention, the size of the recess is made slightly smaller than the size of the cross section of the tube, and the sealing property between the spacer and the tube is improved. Can be strengthened.

According to a fifth aspect of the present invention, in the heat exchanger according to any one of the first to fourth aspects, the end surface of the opening contacting the spacer is inclined, and the spacer surface is an opening of the header. In addition to facilitating the work of inserting into the part, the adhesion between the spacer surface and the opening can also be enhanced.

According to a sixth aspect of the present invention, in the heat exchanger according to any one of the first to fifth aspects, a protrusion is provided on a part of the end surface of the opening that is in contact with the spacer surface. In the insertion into the opening, the position of the spacer surface can be fixed.

A seventh aspect of the present invention is the heat exchanger according to any one of the first to sixth aspects, wherein the tube is an elliptic tube, and the resistance of the fluid flowing outside the tube can be suppressed. .

The invention according to claim 8 is the heat exchanger according to any one of claims 1 to 6 , wherein the tube or the tube row is a flat tube having a plurality of flow paths therein. The number of tubes can be reduced.

The invention according to claim 9 is the method of manufacturing a heat exchanger according to any one of claims 1 to 8 , wherein the tube rows and the spacers are alternately stacked, and then the spacer surface is inserted into the opening. As a result, it is possible to eliminate the step of inserting both ends of a large number of tubes into fine circular holes, so that the heat exchanger can be manufactured in an even easier step.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a front view of a heat exchanger according to Embodiment 1 of the present invention, FIG. 2 is a side view of the heat exchanger of the same embodiment, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2 is a cross-sectional view taken along the line BB of FIG. 2, FIG. 5 is a schematic view showing a method for manufacturing a heat exchange part of the heat exchanger according to the embodiment, and FIG. 6 is a method for manufacturing the heat exchanger according to the embodiment. FIG. 7 is a cross-sectional view perpendicular to the tube axis of another heat exchanger of the embodiment, and FIG. 8 is a view perpendicular to the tube axis of the other heat exchanger of the embodiment. A sectional view is shown.

  1 to 4, the heat exchanger includes a heat exchange unit 1 and headers 2 a and 2 b at both ends of the heat exchange unit 1. The heat exchanging unit 1 is configured such that a tube row 4 composed of a plurality of tubes 3 arranged in parallel on a plane is spaced by a plurality of spacers 5 provided between the tube rows 4 near both ends of the tube 3. It is configured by being laminated. The header 2 a includes spaces 6 a and 6 b, an inflow pipe 7, an outflow pipe 8, and an opening 9 a inside, and the opening 9 a is closed by a spacer surface 10 constituted by the stacked spacers 5. The header 2b includes a space 6c and an opening 9b inside, and the opening 9b is closed by a spacer surface 10 constituted by the stacked spacers 5. The sizes of the openings 9a and 9b are slightly smaller than the spacer surface 10, and at the same time, the end surfaces of the openings 9a and 9b are inclined so as to become narrower toward the internal spaces 6a, 6b, and 6c. In addition, protrusions 11a and 11b are provided on the end surfaces of the openings 9a and 9b continuously with a space corresponding to the thickness of the spacer surface 10, and the spacer surface is provided between the protrusions 11a and 11b. It is supposed to be fixed. The spacer 5 is formed from a flexible material such as rubber, and a recess 12 slightly smaller than the cross section of the tube 1 is provided in a portion in contact with the tube 1. The interior of the header 2a is divided into two spaces 6a and 6b by the partition wall 13, and the partition wall 13 is configured by extending the adjacent spacer 5a into the header 2a.

  As shown in FIG. 5, the tube rows 4 in which the tubes 3 are arranged in parallel in a plane and the spacers 5 provided with the recesses 12 are alternately stacked, and the heat exchange unit 1 is first assembled. Next, as shown in FIG. 6, the spacer surface 10 of the heat exchanging portion 1 is inserted into the respective openings 9a and 9b of the headers 2a and 2b until the spacer surface 10 is fixed between the protrusions 11a and 11b. The portions 9a and 9b are closed.

  In the heat exchanger configured as described above, the fluid A flowing inside the tube 3 and the fluid B flowing outside the tube 3 exchange heat through the tube 3. Specific examples of the fluid A include water and refrigerant, and specific examples of the fluid B include air and gas. Further, the fluid A flows from the inflow pipe 7 into the space 6a of the header 2a, and flows through the inside of the plurality of pipes 3 connected to the space 6a. The fluid A that has flowed through the inside of the pipe 3 once merges in the space 6c of the header 2b, then flows through the inside of the plurality of pipes 3 connected to the space 6b, and merges in the space 6b. Spill from. At this time, in this heat exchanger, the tube rows 4 and the spacers 5 are alternately stacked to constitute the tube group-like heat exchange section 1, so that very thin tubes can be arranged very densely, Since the heat transfer area of the pipe 3 in contact with the fluid A and the fluid B can be made very large, a very high capacity and compact heat exchanger can be realized.

  As described above, in the present embodiment, a tube row 4 composed of a plurality of tubes 3 arranged in parallel on a plane and a plurality of tube rows 4 are stacked with a space between them, in the vicinity of both ends of the tube 3. A plurality of spacers 5 provided between the tube rows 4 and a header 2a having openings 9a and 9b that include both ends of the tube 3 and are closed by a spacer surface 10 constituted by the spacers 5 stacked simultaneously. 2b, the tube group can be easily configured by laminating the tubes 3, and the heat exchanger can be manufactured in a very easy process.

  Further, by making the spacer 5 a flexible material, due to the elastic force of the spacer 5, the sealability between the spacers, the spacer 5 and the tube 3, and the openings 9a and 9b of the spacer surface 10 and the headers 2a and 2b Sealing performance can be ensured, sealing with an adhesive or the like can be eliminated, and the number of manufacturing steps can be reduced.

  Further, by making the size of the spacer surface 10 slightly larger than the size of the openings 9a and 9b, the sealing performance between the spacer surface 10 and the openings 9a and 9b of the headers 2a and 2b can be enhanced.

  Further, by providing the recess 12 on the surface of the spacer 5 in contact with the tube 3, the positioning of the tube 3 installed on the spacer 5 can be facilitated.

  Further, by making the size of the recess 12 slightly smaller than the size of the cross section of the tube 3, the sealing performance between the spacer 5 and the tube 3 can be enhanced.

  Further, by inclining the end surfaces of the openings 9a and 9b in contact with the spacer 5, it is easy to insert the spacer surface 10 into the openings 9a and 9b of the headers 2a and 2b, and the spacer surface 10 and the openings 9a. , 9b can also be improved.

  Further, by providing the projections 11a and 11b on the end surfaces of the openings 9a and 9b that are in contact with the spacer 5, the position of the spacer surface 10 can be fixed when the spacer surface 10 is inserted into the openings 9a and 9b.

  Further, by providing the partition wall 13 in the header 2a, the number of paths of the fluid A flowing inside the pipe 3 can be reduced, the speed of the fluid A can be increased, and the heat transfer coefficient between the fluid A and the pipe 3 is increased. be able to.

  Further, the partition wall 13 can be easily positioned and attached by extending a part of the spacer 5 into the header 2a to form the partition wall 13.

  Furthermore, after the tube rows 4 and the spacers 5 are alternately stacked, the spacer surface 10 is inserted into the openings 9a and 9b, thereby eliminating the step of inserting both ends of the numerous tubes 3 into fine circular holes. Therefore, a heat exchanger can be manufactured by a much easier process.

  In the heat exchanger of the first embodiment, the tube 3 is a circular tube, but the tube 3 may be an elliptical tube as shown in FIG. In this case, the resistance of the fluid flowing outside the tube 3 can be suppressed.

  In the heat exchanger according to the first embodiment, the tube 3 is a circular tube, but the tube 3 or the tube row 4 may be a flat tube having a plurality of flow paths therein as shown in FIG. In this case, the number of tubes can be reduced.

  As described above, the heat exchanger according to the present invention can realize extremely excellent heat exchange performance with a structure that is very easy to manufacture and at low cost, and can be used for heat exchangers for refrigeration equipment and air conditioning equipment. It can also be applied to uses such as waste heat recovery equipment.

The front view of the heat exchanger in Embodiment 1 of this invention Side view of the heat exchanger of the same embodiment AA line sectional view of the heat exchanger of FIG. BB sectional view of the heat exchanger of FIG. Schematic which shows the manufacturing method of the heat exchange part of the heat exchanger of the embodiment Schematic showing the manufacturing method of the heat exchanger of the embodiment Sectional drawing perpendicular to the tube axis of another heat exchanger of the same embodiment Sectional drawing perpendicular to the tube axis of another heat exchanger of the same embodiment Front view of conventional heat exchanger

Explanation of symbols

2a, 2b Header 3 Tube 4 Tube row 5, 5a, 5b Spacer 9a, 9b Opening 10 Spacer surface 11a, 11b Protrusion 12 Recess 13 Partition wall

Claims (9)

A plurality of tube rows arranged in parallel on a plane and a plurality of the tube rows stacked with a space therebetween, and a plurality of spacers provided between the tube rows near both ends of the tube If, enclosing the ends of the tube, Ri Do and a header having an opening which is closed by the spacer surface formed by the spacers stacked at the same time the spacer and flexible material, of the spacer one The heat exchanger which provided the partition wall in the said header by extending a part in the said header . The heat exchanger according to claim 1 , wherein the size of the spacer surface is slightly larger than the size of the opening. The heat exchanger according to claim 1 or 2 , wherein a recess is provided on a surface of the spacer that contacts the pipe. The heat exchanger according to claim 3 , wherein a size of the recess is slightly smaller than a size of a cross section of the tube. The heat exchanger according to claims 1 to 4 in which beveled to an end face of the opening in contact with the spacer. The heat exchanger according to claims 1-5 provided with a projection or step on a part of the end surface of the opening in contact with the spacer. The heat exchanger according to any one of claims 1 to 6 , wherein the tube is an elliptic tube. The heat exchanger according to any one of claims 1 to 6 , wherein the tube or the tube row is a flat tube having a plurality of flow paths therein. The method for manufacturing a heat exchanger according to any one of claims 1 to 8 , wherein after the tube rows and the spacers are alternately stacked, the spacer surface is inserted into the opening.

Images