JP2007147234A - Fin tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fin tube having high corrosion resistance and provided with a fin member having a sufficient surface area and a large number of long edges to improve heat radiation performance. <P>SOLUTION: At least one resin coating layer 6 is formed on an outer peripheral face of a pipe member 3, and the fin member 1 formed by spirally winding one wire rod is disposed on a surface of the resin coating layer 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is widely used in oil and fuel cooling pipes for automobiles and construction machinery, air conditioners that adjust the temperature and humidity of residential spaces, refrigerators and refrigerators that preserve food freshness, chemical reaction towers, etc. This relates to the fin tube used.

  Conventionally, as in the inventions described in Patent Documents 1 and 2, polyamide (PA), an extrusion molding method, is used on the outer peripheral surface of a steel pipe, such as a zinc pipe or a chromate film, or a metal pipe such as an aluminum pipe. There is a fin tube provided with a thermoplastic resin film layer such as polypropylene (PP) or polyethylene (PE). Such conventional fin tubes prevent damage to the anticorrosion plating layer and metal pipes due to stepping stones, etc., due to the impact absorption capacity, water resistance, chemical resistance, etc. of the resin coating layer, and metal pipes due to mud splashes and chemicals. This prevented the oxidation of the fin tube and improved the corrosion resistance of the fin tube. However, the fin tubes described in Patent Documents 1 and 2 have a problem in terms of heat dissipation characteristics because the resin film layer is formed thick in order to improve impact resistance and corrosion resistance. It has been difficult to efficiently exchange heat between fluids that circulate.

Therefore, as in the invention described in Patent Document 3, a resin film layer having high corrosion resistance is provided on the outer peripheral surface of the metal tube, and a heat transfer body is provided on the outer peripheral surface of the resin film layer, and further on the outer peripheral surface of the heat transfer body. A resin-made fin member wound in a spiral shape is known.
Japanese Patent Laid-Open No. 8-188844 Japanese Patent Laid-Open No. 10-315295 JP 2004-101168 A

  However, since the fin member as shown in Patent Document 3 has a smooth surface, a larger surface area is required to further improve the heat dissipation of the fin tube. Further, since the fluid flowing on the surface of the fin member formed in this way is rectified, the boundary layer existing on the surface of the fin member becomes thick, and it has been difficult to sufficiently exert the heat exchange function by heat dissipation. .

  Accordingly, the present invention is intended to solve the above-described problems, and has a high corrosion resistance and a fin tube provided with a fin member having a surface area sufficient to enhance heat dissipation and a large number of long edges. Is going to get.

  In order to solve the above-described problems, the present invention provides a fin member formed by winding at least one resin film layer on the outer peripheral surface of a pipe member and spirally winding a single wire. It is arrange | positioned on the surface of this.

  The fin member may be spirally wound around the surface of the resin coating layer.

  In addition, the fin member may be wound around the surface of the resin coating layer in a ring shape, and a plurality of fin members may be disposed at intervals in the axial direction of the tube member.

  Further, the fin member may be wound around the tube member by bringing the outer portion of the spiral arranged on the tube member side at the time of winding into direct contact with the surface of the resin film layer of the tube member.

  Further, the fin member is formed by fixing one surface of the belt material on the outer side of the spiral disposed on the tube member side when winding, and the other surface of the belt material faces the surface of the resin film layer of the tube member. It may be contacted and wound around a pipe member.

  Further, the fin member may be one in which an inner belt material is arranged on the inner side of a spiral arranged on the tube member side during winding.

  Further, the fin member may be one in which an inner fixed wire is disposed on the inner side of a spiral disposed on the tube member side during winding.

  Further, the fin member may be bonded and fixed to the resin film layer with an adhesive.

  The fin member may be one that is fused and fixed to the resin film layer.

  The present invention is configured as described above. By coating at least one resin coating layer on the outer peripheral surface of the pipe member, the corrosion resistance of the pipe member against a stepping stone or the like can be improved. In addition, by disposing a fin member formed by spirally winding a single wire on the surface of the resin coating layer, the surface area of the fin member can be easily increased, and a large number of long edges can be obtained. The boundary layer is peeled off by forming a large turbulence or vortex in the fluid flow outside the tube. Therefore, it is possible to improve the heat dissipation and heat absorption of the fin tube by the large surface area and the many long edges.

  Embodiment 1 of the present invention will be described with reference to FIG. 1. (1) is a fin member, and as shown in FIG. 1, a spiral member (18) formed by spirally winding a single wire (2). ). The fin member (1) is formed by winding in a flat oval shape with a wire (2) such as stainless steel, aluminum, an aluminum base alloy, copper, a copper base alloy, or iron.

  The pipe member (3) for disposing the fin member (1) is made of zinc or zinc on the surface of a metal pipe (7) formed of stainless steel, aluminum, aluminum base alloy, copper, copper base alloy, iron or the like. The first plating layer (4) is formed by applying a system plating, and the surface of the first plating layer (4) is subjected to a hexavalent, preferably trivalent chromate treatment or upper plating to form a second plating layer. (5) is formed. The surface of the second plating layer (5) of the pipe member (3) is covered with a resin coating layer (6) by an extrusion molding apparatus or the like.

  This resin coating layer (6) is formed of polyamide (PA) such as polyamide 12, polypropylene (PP), polyethylene (PE) or the like in this Example 1 and Examples 2 to 6 below, and is a tube. Only one layer is disposed on the outer peripheral surface of the member (3). The resin film layer (6) of the present invention can be used by appropriately combining these resins in addition to using PA, PP, PE and the like alone. In other different embodiments, the resin film layer (6) is not limited to a single layer, but can be disposed on a multi-layer pipe member (3). Thus, by covering the outer peripheral surface of the pipe member (3) with the resin film layer (6), the corrosion resistance of the pipe member (3) can be further improved.

  In Example 1 and Examples 2 to 6 below, the second plating layer (5) is formed by performing chromate treatment on the surface of the first plating layer, but in other different examples, You may form a 2nd plating layer (5) by performing a coating-film process instead of a chromate process. Further, nickel or a nickel base alloy may be plated as the first plating layer (4), and zinc or a zinc base alloy may be plated as the second plating layer (5). Further, the chromate treatment or the resin coating layer (6) may be used. An epoxy primer or the like may be provided in order to improve the adhesion to the substrate.

  Further, in the first embodiment and the following second to sixth embodiments, the first plated layer (4) and the second plated layer (5) are provided on the metal tube (7) as described above to form the tube member (3). In other different embodiments, the outer peripheral surface of the pipe member (3) consisting only of the metal pipe (7) without providing the first plating layer (4) and the second plating layer (5), etc. Alternatively, the resin film layer (6) may be directly coated. Thus, even when the pipe member (3) not provided with the first plating layer (4) or the second plating layer (5) is used, the resin film layer (6) is formed on the outer peripheral surface of the pipe member (3). The product excellent in corrosion resistance can be obtained by coating.

  Then, the coil member (3) formed with the resin film layer (6) as described above is spirally wound while pulling the coiled fin member (1), and the fin member (1) is wound around the tube member (3). It is arranged. By winding the fin member (1) while being pulled in this way, the fin member (1) is disposed on the tube member (3) side by the restoring force of the spiral member (18) forming the fin member (1). The outer part (8) of the helix and the surface of the resin film layer (6) are closely arranged, and the contact part (12) of the outer part (8) with the resin film layer (6) is a resin film. The elastic force of the layer (6) slightly bites into the resin coating layer (6). Therefore, the contact area between the contact portion (12) and the surface of the resin film layer (6) is widened, and special work such as bonding the fin member (1) to the pipe member (3) is required. In addition, it is possible to provide a more stable and tightly arranged arrangement, and more reliably transfer heat from the tube member (3) to the fin member (1) through the resin film layer (6). It becomes possible.

  Then, by winding the fin member (1) around the pipe member (3) in this way, as shown in FIG. 1, the pin-like piece (10) formed by the fin member (1) is transformed into the resin film layer (6 ) Are continuously arranged in a spiral manner on the surface. Therefore, the presence of the plurality of pin-like pieces (10) increases the surface area of the fin member (1) and forms a large number of long edges, greatly disturbing the flow of fluid outside the pipe of the pipe member (3). Since it can be generated and the boundary layer can be peeled off, heat dissipation can be improved.

  In the first embodiment, the fin member (1) is spirally wound around the pipe member (3). However, in the second embodiment of the present invention, as shown in FIG. The member (1) is wound in an annular shape. The second embodiment will be described in detail. The fin member (1) of the second embodiment is formed in an annular shape by connecting one end and the other end of the spiral member (18), and this annular fin member (1). The pipe member (3) provided with the resin film layer (6) is inserted into the opening (11) in the same manner as in Example 1, and the fin member (1) is inserted into the resin film layer (3) of the pipe member (3). It is arranged on the surface of 6). A plurality of such annular fin members (1) are arranged on the tube member (3) provided with the resin film layer (6) with an interval in the axial direction.

  At this time, the diameter of the opening (11) of the annular fin member (1) is smaller than the outer diameter of the tube member (3) provided with the resin film layer (6). Therefore, when the fin member (1) is arranged on the pipe member (3), the contact portion (12) with the resin film layer (6) on the outer side portion (8) of the fin member (1) becomes the fin member (1). ) Is formed in a state of being contracted and urged in the direction of the resin film layer (6) by the restoring force of the spiral member (18) forming the). Thereby, the contact part (12) of the fin member (1) slightly bites into the resin film layer (6) by the elastic force of the resin film layer (6).

  Therefore, the fin member (1) becomes difficult to move in the tube axis direction of the pipe member (3), and the contact area between the contact portion (12) of the fin member (1) and the surface of the resin film layer (6). The fin member (1) can be stably arranged on the pipe member (3). Therefore, it is possible to easily and stably dispose the fin member (1) on the surface of the resin film layer (6) without performing a special operation such as bonding, and to obtain a product that is easy to manufacture and inexpensive. Can do.

  In the second embodiment, as described above, one end and the other end of the spiral member (18) are first connected in an annular shape to form the fin member (1), and the fin member (1) is formed on the resin film layer ( 6), but in another different embodiment, the spiral member (18) is wound around the surface of the resin film layer (6) in an annular shape, and then one end of the spiral member (18) is provided. It is also possible to arrange the fin member (1) on the pipe member (3) by connecting the other end to the other end. However, as in Example 2, it is more efficient in terms of work if the fin member (1) is formed first and disposed on the surface of the resin film layer (6).

  Then, by disposing the annular fin member (1) on the surface of the resin film layer (6) formed on the pipe member (3) as described above, the fin member (1) is formed on the surface of the resin film layer (6). A plurality of pin-like pieces (10) formed by the above-described method are provided in an annular shape. Therefore, the corrosion resistance of the pipe member (3) is maintained high, and the surface area of the fin member (1) is increased and a large number of long edges are formed. Therefore, the boundary layer is formed by this large surface area and a large number of long edge effects. It becomes possible to improve heat dissipation by peeling.

  Moreover, in the said Example 1 and 2, although the fin member (1) is formed with the spiral member (18) which made the winding shape the ellipse shape, in Example 3 of this invention, it shows in FIG. As described above, the fin member (1) is formed of a spiral member (18) having an isosceles triangular shape whose base is shorter than the other two sides. Then, the fin member (1) is formed in an annular shape as in the second embodiment, and a plurality of the annular fin members (1) are arranged on the outer peripheral surface of the pipe member (3) provided with the resin film layer (6). Has been established. In the third embodiment, as described above, the fin member (1) is annularly wound around the outer peripheral surface of the pipe member (3). However, in other different embodiments, the fin member (1) is wound around the outer peripheral surface of the pipe member (3). It may be wound spirally.

  By disposing the fin member (1) on the pipe member (3) as described above, the surface of the resin film layer (6) has a substantially triangular shape that is long in the direction perpendicular to the axial direction of the pipe member (3). The pin-shaped pieces (10) project in a plurality of locations in a ring shape. Accordingly, since the surface area of the fin member (1) is increased and a large number of edges are formed, it is possible to improve heat dissipation. Further, the contact portion (12) of the outer portion (8) of the fin member (1) with the resin film layer (6) is annularly adhered to the surface of the resin film layer (6), and the triangular fin member ( Since the bottom side of 1) is arranged in contact with a wide line in a state of being contracted and biased toward the resin film layer (6), the fin member (1) is stably arranged on the outer peripheral surface of the pipe member (3). In addition, heat from the tube member (3) can be reliably transmitted to all the pin-like pieces (10), and heat can be efficiently radiated from the entire fin member (1).

  Moreover, in the said Examples 1-3, the outer side part (8) of the spiral of the fin member (1) formed with the spiral member (18) is used as the surface of the resin film layer (6) formed on the pipe member (3). The fin member (1) is disposed on the pipe member (3) in direct contact with the pipe member (3). However, in the fourth embodiment of the present invention, the fin member (1) is connected to the outer portion of the spiral of the spiral member (18). (8) The belt member (13) is fixed and formed, and the belt member (13) is in close contact with the surface of the resin film layer (6) formed on the pipe member (3). 1) is wound around the pipe member (3).

  The fourth embodiment will be described in detail. The fin member (1) of the fourth embodiment includes a spiral member (18) having a rectangular winding shape. The outer part (8) of the spiral is fixed to one surface of a thin and long belt material (13) continuously from one end to the other end by brazing or the like. The pipe member (3) is pulled while pulling the belt member (13) in a state where the other surface of the belt member (13) to which the spiral member (18) is fixed is brought into surface contact with the surface of the resin film layer (6). ) Spirally.

  Thus, the belt member (13) is wound by the elastic force of the resin film layer (6) provided on the tube member (3) by winding the fin member (1) around the tube member (3) while pulling the belt material (13). ) Slightly bites into the resin coating layer (6). Therefore, the other surface of the belt material (13) can be strongly and closely arranged on the surface of the resin film layer (6) without requiring any special fixing means such as adhesion, and the fin member (1) is connected to the pipe member (3 ) In a stable state, and heat from the pipe member (3) can be more reliably transmitted to the fin member (1) through the resin film layer (6). Become.

  Moreover, in the said Examples 1-3, in order to make the outer side part (8) of the spiral of a fin member (1) contact the surface of a resin film layer (6) directly, the contact part (12) of a fin member (1) is provided. In some cases, the resin film layer (6) bites unevenly. However, in Example 4, the other surface of the belt material (13) is in surface contact with the resin film layer (6). The bite into the resin film layer (6) is uniform. Therefore, it becomes possible to arrange the fin member (1) on the pipe member (3) more stably. In addition, as described above, the belt member (13) is fixed to the spiral member (18) in advance to form the fin member (1), so that the workability at the time of manufacture is improved and the work can be performed efficiently. It becomes.

  In the fourth embodiment, the belt material (13) is disposed on the outer portion (8) of the spiral of the spiral member (18). However, in the fifth embodiment of the present invention, the spiral of the spiral member (18) is arranged. An inner belt member (15) which is formed in a thin plate shape and is elongated is disposed on the inner portion (14). That is, first, the inner belt material (15) is arranged in advance on the inner side portion (14) of the spiral of the spiral member (18) having a rectangular winding shape, and this inner belt material (15) is placed on the spiral member (18). It is fixed by welding or brazing along the inner part (14). Next, the spiral member (18) is spirally formed on the outer peripheral surface of the pipe member (3) in a state where the outer portion (8) of the spiral member (18) is in direct contact with the surface of the resin film layer (6). Wind it around.

  Thus, the inner belt member (15) is arranged on the inner portion (14) of the spiral of the spiral member (18) and wound around the tube member (3), whereby the fin member (1) is turned into the tube member (3). It will be fixed more firmly. Therefore, it becomes possible to arrange | position the fin member (1) to a pipe member (3) in the stable state. In addition, workability at the time of manufacture is improved, and work can be performed efficiently.

  In the fifth embodiment, the inner belt member (15) is disposed on the inner spiral portion (14) of the fin member (1). However, in the sixth embodiment of the present invention, as shown in FIG. An inner fixed wire (16) is arranged on the inner side (14) of the spiral of the fin member (1) formed by a spiral member (18) having a flat oval shape. In this way, by arranging the inner fixed wire (16) around the spiral inner part (14) of the fin member (1) and winding it around the pipe member (3), the fins can be obtained in the same manner as in the fifth embodiment. The member (1) can be fixedly disposed on the pipe member (3) more firmly. In addition, workability at the time of manufacture is improved, and work can be performed efficiently.

  In addition, in another different Example, it becomes possible to improve heat conductivity further by making the resin film layer (6) used in the said Examples 1-5 and this Example 6 contain a carbon nanofiber. Therefore, it becomes more preferable. Moreover, it is also possible to fix the fin member (1) to the resin film layer (6) of the pipe member (3) with an adhesive. In this case, since heat conductivity can be further improved by including carbon nanofibers in the adhesive, it is more preferable. Further, by using the adhesive as described above, heat from the resin film layer is easily transmitted to the fin member via the adhesive, so that it is possible to further improve the heat conductivity.

  In another different embodiment, after the fin member (1) is wound around the pipe member (3) as shown in the first to fifth embodiments and the sixth embodiment, the resin film layer (6) is The resin film layer (6) is softened by heating to a temperature above the glass transition point of the resin constituting the resin film layer (6) and below the melting point, and the fin member (1) is deeply penetrated into the resin film layer (6) and fused. If the contact area between the contact portion (12) of the fin member (1) and the resin film layer (6) is further increased, it is more preferable. In addition, after winding the fin member (1), the resin film layer (6) in contact with the fin member (1) is partially melted by heating to a temperature higher than the melting point of the resin, When the fin member (1) is fused to the resin film layer (6), the contact area between the contact portion (12) of the fin member (1) and the resin film layer (6) is increased, and the fin member (1) is This is more preferable because it can be more firmly fixed to the resin film layer (6). However, when fusing by heating above the melting point, care must be taken because the molten resin may flow out during the production and dripping may occur.

  Further, in the sixth embodiment and the first to fifth embodiments, the cross-sectional shape of the wire (2) is circular as shown in FIG. 7A, but in other different embodiments, as shown in FIG. , (B) oval, (c) quadrangle, (d) triangle, (e) rhombus, (f) star, etc. Further, the spiral shape of the spiral member (18) forming the fin member (1) is an ellipse as shown in FIG. As shown in FIG. 8 (b), the flat and substantially isosceles triangular shape is used, and in the fourth and fifth embodiments, the rectangular shape is used as shown in FIG. 8 (c). As described above, an arbitrary winding shape such as (d) a square shape or (e) a substantially gourd shape may be used. In addition, although the said Examples 1-5 and the present Example 6 demonstrated the case of heat dissipation, in the case of heat absorption, a heat flow becomes reverse.

Sectional drawing of the fin tube which shows Example 1 of this invention. Sectional drawing of the fin tube which shows Example 2 of this invention. The fragmentary sectional view of the fin tube which shows Example 3 of this invention. The end view of the fin tube which shows Example 4 of this invention. The end view of the fin tube which shows Example 5 of this invention. The end view of the fin tube which shows Example 6 of this invention. Sectional drawing of the wire which shows Examples 1-6 of this invention and another different Example. The conceptual diagram of the winding shape of the spiral member which shows Examples 1-6 of this invention and another different Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fin member 2 Wire material 3 Pipe member 8 Outer part 13 Belt material 14 Inner part 15 Inner belt material 16 Inner fixed wire

Claims (9)

  A fin characterized in that at least one resin film layer is coated on the outer peripheral surface of the pipe member, and a fin member formed by spirally winding a single wire is disposed on the surface of the resin film layer. tube.   The fin tube according to claim 1, wherein the fin member is spirally wound around the surface of the resin coating layer of the tube member.   2. The fin tube according to claim 1, wherein a plurality of fin members are wound around the surface of the resin coating layer of the tube member in a ring shape, and a plurality of fin members are disposed at intervals in the axial direction of the tube member.   The fin member is wound around the pipe member by bringing the outer part of the spiral disposed on the pipe member side at the time of winding into direct contact with the surface of the resin film layer of the pipe member. Or 3 fin tubes.   The fin member is formed by fixing one surface of the belt material on the outer side of the spiral disposed on the tube member side when wound, and the other surface of the belt material is brought into surface contact with the surface of the resin film layer of the tube member. The fin tube according to claim 1, 2 or 3, wherein the fin tube is wound around a pipe member.   The fin tube according to claim 1, 2, 3, 4, or 5, wherein the fin member has an inner belt member disposed on an inner side of a spiral disposed on the tube member side during winding.   6. The fin tube according to claim 1, wherein the fin member has an inner fixed wire disposed on an inner side of a spiral disposed on the tube member side at the time of winding.   4. The fin tube according to claim 1, wherein the fin member is bonded and fixed to the resin film layer with an adhesive. 4. The fin tube according to claim 1, wherein the fin member is fused and fixed to the resin film layer.

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