JP2007093073A - Finned tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a finned tube capable of being easily and inexpensively manufactured, having a surface area sufficient to increase a radiating performance, forming a number of long edges, and stably and efficiently radiating heat. <P>SOLUTION: This fin member 1 is formed by fixing an outer portion 6 of a spiral member 4 formed by spirally winding a piece of wire rod 3, to one face 11 of a belt material 5, the other face 12 of the belt material 5 of the fin member 1 is kept into face-contact with an outer peripheral face of a tube member 2, and the fin member 1 is wound on the outer peripheral face of the tube member 2, and fixed thereto. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oil cooling pipe for automobiles and construction machinery, an air conditioner for adjusting the temperature and humidity of a living space, a refrigerator / freezer for keeping food fresh and preserved, a fin tube widely used in a reaction tower of a chemical facility, etc. It is concerned.

  Conventionally, as a fin tube used for an oil cooling pipe or the like of an automobile as described above, a long plate member having a constant width is spirally wound around an outer peripheral surface of a pipe member as in the invention shown in Patent Document 1. Although what is formed is known, since such a fin member has a smooth surface, a larger surface area is required to further improve heat dissipation. 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 is difficult to sufficiently exhibit the heat exchange function by heat dissipation.

Therefore, as shown in Patent Document 2, a fixing band in which a plurality of pin-shaped fin members are arranged at regular intervals is spirally wound around the surface of the pipe material, and the pin-shaped fin member is projected from the pipe material. It is publicly known. The pin-shaped fin member is provided with a distal end portion protruding from the fixed band and a proximal end portion in contact with the surface of the pipe material. In this way, by disposing the pin-shaped fin member on the surface of the tube material, the surface area is increased, and the boundary layer is peeled off by generating turbulent flow in the fluid flowing on the surface of the fin member, and the heat exchange function by heat radiation The purpose is to increase.
JP 09-42573 A JP 2003-214792 A

  However, in the fin member as shown in Patent Document 2, a plurality of pin-shaped fin members must be individually formed, and such pin-shaped fin members are arranged one by one on the pipe material. Therefore, it takes a lot of time to manufacture, and the manufacturing cost is high. In addition, since such pin-shaped fin members are likely to vary in the degree of contact with the surface of the pipe material for each pin, there is a difference in the heat dissipation performance for each pin, and the heat transfer efficiency is high. It was not stable.

  The present invention is intended to solve the above-described problems, and is easy to manufacture and low in manufacturing cost, has a sufficient surface area to increase heat dissipation, and forms a large number of long edges to stabilize heat dissipation. Thus, it is intended to obtain a fin tube provided with a fin member that can be efficiently performed.

  In order to solve the above-described problems, the present invention forms a fin member by fixing an outer portion of a spiral member formed by spirally winding a single wire to one surface of a belt member, and forming a belt for the fin member. The other surface of the material is brought into surface contact with the outer peripheral surface of the tube member, and the fin member is wound around and fixed to the outer peripheral surface of the tube member.

  The fin member may be spirally wound around the outer peripheral surface of the tube member.

  Further, a plurality of fin members may be disposed around the outer peripheral surface of the pipe member in a ring shape and provided with a plurality of intervals in the axial direction of the pipe member.

  Further, the pipe member may be one in which a spiral groove is provided on the outer peripheral surface, and a belt member of the fin member is disposed in the groove.

  Further, the pipe member may be formed by forming annular concave grooves on the outer peripheral surface at a plurality of locations at intervals in the axial direction and disposing a belt member of the fin member in the concave grooves.

  Further, the spiral member may have a flat wound shape.

  The spiral member may be fixed to one surface of the belt material by brazing, welding, or adhesion.

  Further, the fin member may be one in which the other surface of the belt material is in close contact with the outer peripheral surface of the tube member and disposed on the tube member.

  The fin member may be disposed on the pipe member by fixing the other surface of the belt material to the outer peripheral surface of the pipe member by brazing, welding, or adhesion.

  Further, the fin member may be one in which the inner belt material is arranged on the inner side of the spiral member on the belt material arrangement side.

  Further, the fin member may be one in which an inner wire is arranged on the inner side of the spiral member on the belt material arrangement side.

  The present invention is configured as described above, and a fin member is formed by fixing an outer portion of a spiral member formed by spirally winding a single wire to one surface of a belt member. The surface area can be easily increased. In addition, a large number of long edges are formed, and a large disturbance or vortex is generated in the flow of fluid outside the tube, and the boundary layer is peeled off. Therefore, heat dissipation can be enhanced by the large surface area and a large number of long edges.

  Further, by fixing the outer portion of the spiral member to one surface of the belt material and bringing the other surface into surface contact with the outer peripheral surface of the tube member and winding and fixing the fin member around the outer peripheral surface of the tube member, Heat is transmitted to the entire fin member uniformly and uniformly, and heat radiation can be performed stably and efficiently. Further, since the fin member can be easily disposed on the tube member, it is easy to manufacture the fin tube provided with the fin member capable of improving the heat dissipation as described above, and the manufacturing cost is low. It becomes possible.

  Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. (1) is a fin member formed of a spiral member (4) and a belt material (5). As shown in FIG. It arrange | positions helically on the outer peripheral surface of a member (2). The first embodiment will be described in more detail. The fin member (1) of the first embodiment includes a flat spiral member (4) formed by spirally winding a single wire (3), and a thin plate shape. It is formed with a long belt material (5), and the outer part (6) of the spiral member (4) is continuously connected from one end to the other end on one surface (11) of the belt material (5). It is fixed.

  The spiral member (4) has an elliptical shape as shown in FIG. 2 and is made of stainless steel, aluminum, an aluminum-based alloy, copper, a copper-based alloy, or preferably surface-treated iron. It is formed with a wire (3). Similarly to the spiral member (4), the belt member (5) is made of stainless steel, aluminum, an aluminum-base alloy, copper, a copper-base alloy, or preferably surface-treated iron.

  Then, the fin member (1) formed by the spiral member (4) and the belt material (5) as described above is in surface contact with the outer surface of the pipe member (2) on the other surface (12) of the belt material (5). As shown in FIG. 1, while being pulled, the outer diameter and the inner diameter are spirally wound around the outer peripheral surface of the pipe member (2) having the same diameter from one end to the other end, and special fixing such as brazing Close without using means. Then, by winding the fin member (1) around the tube member (2) in this way, the pin-like piece (7) formed by the spiral member (4) spirals around the outer peripheral surface of the tube member (2). A plurality are provided.

  Further, since the fin member (1) is disposed on the pipe member (2) by bringing the other surface (12) of the fin member (1) into contact with the outer peripheral surface of the pipe member (2), the pipe member (2 ) Is widely transmitted to all the pin-like pieces (7) through the belt material (5), and heat radiation from the entire fin member (1) can be performed stably and efficiently. . Also, the fin member (1) can be tightly fixed to the surface of the pipe member (2) as shown in FIG. 2 simply by winding the fin member (1) around the pipe member (2). The fin tube can be easily manufactured without requiring attachment or adhesion, and the manufacturing cost can be reduced.

  Further, due to the presence of a plurality of pin-like pieces (7) arranged on the outer peripheral surface of the pipe member (2), the surface area of the fin member (1) is increased and a large number of long edges are formed. Therefore, the boundary layer can be peeled off by generating a large turbulence or vortex in the fluid flow outside the tube by the edge effect, and the heat dissipation can be enhanced by the large surface area and the edge effect.

  In the first embodiment, the fin member (1) is spirally wound around the pipe member (2) having the same outer diameter and inner diameter from one end to the other. However, in the second embodiment of the present invention, A concave groove (8) is spirally formed in the outer peripheral surface of the pipe member (2), and the belt member (5) of the fin member (1) is disposed in the concave groove (8) to thereby obtain the fin member (1). ) Is wound around the pipe member (2). The second embodiment will be described in more detail. As shown in FIG. 3, the outer circumferential surface of the pipe member (2) has a substantially U-shaped cross section with a slightly wider width than the belt material (5) and a flat bottom (10). The concave grooves (8) are arranged at regular intervals for each circumference.

  Further, since the bottom portion (10) of the concave groove (8) is flat, the other surface (12) of the belt material (5) is brought into surface contact with the bottom portion (10) of the concave groove (8) to thereby obtain the fin member (1). Can be arranged on the pipe member (2). Therefore, heat from the pipe member (2) is reliably transmitted to all the pin-like pieces (7) through the belt material (5), and heat radiation from the entire fin member (1) is efficiently performed. In addition, the fin member (1) is difficult to move in the axial direction of the tube member (2), and the fin member (1) can be stably disposed on the tube member (2). Further, since the concave and convex portions are formed in the pipe by forming the concave groove (8) in the pipe member (2), it becomes possible to cause turbulence in the fluid inside the pipe of the pipe member (2). .

  In the first and second embodiments, the other surface (12) of the belt member (5) of the fin member (1) is attached to the outer peripheral surface of the pipe member (2) without using any special fixing means such as brazing. The fin member (1) is wound around the pipe member (2) closely, but in the third embodiment of the present invention, as shown in FIG. 4, the other surface (12) of the belt material (5) and the pipe member (2 ) Is fixed to the outer peripheral surface by brazing.

  In this way, by fixing the fin member (1) and the outer peripheral surface of the pipe member (2) by brazing, the fin member (1) does not move even if vibration or the like occurs. ) Can be arranged on the pipe member (2) in a more stable state. In the third embodiment, the fin member (1) and the pipe member (2) are fixed by brazing. However, in other different embodiments, they can be fixed by welding, bonding, or the like.

  Moreover, in the said Examples 1-3, although the fin member (1) is formed with the spiral member (4) which made the winding shape the ellipse shape, in Example 4 of this invention, it shows in FIG. Thus, the fin member (1) is formed by the spiral member (4) having a rectangular winding shape. Moreover, in the said Examples 1-3, although the fin member (1) is helically wound around the outer peripheral surface of the pipe member (2), in this Example 4, the fin member (1) is made into the pipe member (2 ) Around the outer circumferential surface.

  The fourth embodiment will be described in more detail. The outer side portion (6) on the short side of the spiral member (4) having a rectangular winding shape is brazed to one surface (11) of the belt material (5). It is fixed. At this time, as shown in FIG. 5, the outer portion (6) of the spiral member (4) is in line contact with the belt material (5), so the outer portion (6) of the spiral member (4) is the belt material (5). Compared with the fin members (1) of Examples 1 to 3 that make point contact with one surface (11), the contact area between the spiral member (4) and the belt material (5) is increased, and the pipe member (2) The fin member (1) can be stably disposed on the outer peripheral surface. Therefore, the heat from the tube member (2) is reliably and widely transmitted to all the pin-like pieces (7), and the heat radiation from the entire fin member (1) can be efficiently performed.

  In order to dispose the fin member (1) formed as described above to the pipe member (2), first, one end and the other end of the spiral member (4) are connected in an annular shape to form the annular fin member (1). After that, the tube member (2) having the same outer diameter and inner diameter from one end to the other end is inserted into the opening (13) of the annular fin member (1).

  At this time, the diameter of the opening (13) of the annular fin member (1) is made slightly larger than the outer diameter of the tube member (2), and the tube member (2) is inserted into the fin member (1). In this case, the other surface (12) of the belt member (5) comes into surface contact with the outer peripheral surface of the pipe member (2), and the fin member (1) is difficult to move even if some vibration occurs. In this way, the fin member (1) is arranged in close contact with the pipe member (2) without using any special fixing means such as brazing. In this state, with the fin member (1) arranged on the pipe member (2), the pipe member (2) is further expanded by a method such as a hydraulic bulge or mechanical pipe expansion, so that the pipe member (2) More preferably, the outer peripheral surface of the belt is closely attached to the other surface of the belt material (5).

  Further, a plurality of such annular fin members (1) are arranged at a certain interval in the axial direction of the pipe member (2). By disposing the annular fin member (1) on the tube member (2) in this way, a plurality of pin-like pieces (7) are disposed on the outer peripheral surface of the tube member (2) in an annular shape. . Therefore, the presence of the pin-like piece (7) increases the surface area of the fin member (1), and a large number of long edges are formed to peel off the boundary layer, thereby improving the heat dissipation.

  In the fourth embodiment, as described above, one end and the other end of the spiral member (4) are connected to each other in an annular shape to form an annular fin member (1), and the fin member (1) is connected to the tube. Although arranged in the member (2), in another different embodiment, after the spiral member (4) is wound around the tube member (2) in an annular shape, one end and the other end of the spiral member (4) It is also possible to dispose the annular fin member (1) on the pipe member (2). However, it is more efficient in terms of work to form the annular fin member (1) first as in the present embodiment and then place the fin member (1) on the pipe member (2).

  In the fourth embodiment, the fin member (1) is annularly arranged on the pipe member (2) having the same outer diameter and inner diameter from one end to the other end. As shown in FIG. 6, a plurality of annular grooves (8) are provided at desired intervals on the outer peripheral surface of the pipe member (2), and the belt member (5) of the fin member (1) is placed in the grooves (8). The fin member (1) is wound around the pipe member (2). Therefore, the fin member (1) is difficult to move in the axial direction from the pipe member (2), and the fin member (1) can be stably disposed on the pipe member (2).

  Moreover, in the said Examples 1-5, a helical member (4) is fixed to one surface (11) of a belt material (5), a fin member (1) is formed, and this fin member (1) is made into a pipe member (2). In the sixth embodiment of the present invention, the spiral member (4) is fixed to one surface (11) of the belt member (5) to fix the fin member (1). ) And the fin member (1) is wound around the outer peripheral surface of the pipe member (2). Further, as shown in FIG. 7, the inner side of the spiral member (4) on the belt material (5) arrangement side ( 14), the inner belt material (15) is arranged. At this time, one surface (17) of the inner belt member (15) is wound in an annular shape so as to be in close contact with the inner portion (14) of the spiral member (4). Since the pin-like piece (7) is firmly fixed to the pipe member (2) by closely contacting the spiral member (4) and winding the pin-like piece (7), the spiral member (4) is attached to the pipe member (2). ) Can be arranged more stably.

  In the sixth embodiment, the inner belt member (15) is disposed on the inner portion (14) of the spiral member (4). However, in the seventh embodiment of the present invention, the inner portion (14) of the spiral member (4) is arranged. The inner wire (16) is arranged in an annular shape at both ends of). By arranging the inner wire (16) at both ends of the inner part (14) of the spiral member (4) in this way, the spiral member (4) can be more stably arranged on the pipe member (2). It becomes.

  Moreover, in this Example 7 and the said Examples 1-6, as shown to Fig.9 (a), although the cross-sectional shape of the wire (3) is circular, in another different Example, as shown in FIG. It may have an arbitrary shape such as (b) an ellipse, (c) a square, (d) a triangle, (e) a rhombus, or (f) a star. Further, in Example 7 and Examples 4 to 6, the spiral shape of the spiral member (4) is rectangular as shown in FIG. 10 (c), and in Examples 1 to 3 shown in FIG. 10 (a). However, in other different embodiments, as shown in FIG. 10, an arbitrary winding shape such as (b) a triangle, (d) a square shape, (e) a gourd shape may be used. In addition, although the said Examples 1-6 and the present Example 7 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. The partial end elevation of the fin tube of Example 1. FIG. The end view of the fin tube which shows Example 2 of this invention. The fragmentary end view of the fin tube which shows Example 3 of this invention. Sectional drawing of the fin tube which shows Example 4 of this invention. Sectional drawing of the fin tube which shows Example 5 of this invention. The fragmentary end view of the fin tube which shows Example 6 of this invention. The fragmentary end view of the fin tube which shows Example 7 of this invention. Sectional drawing of the wire which shows Examples 1-7 of this invention and another different Example. The winding shape of the spiral member which shows Examples 1-7 of this invention and another different Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fin member 2 Pipe member 3 Wire material 4 Spiral member 5 Belt material 6 Outer part 8 Concave groove 11 One surface 12 Other surface 14 Inner part 15 Inner belt material 16 Inner wire material

Claims (11)

  A fin member is formed by fixing an outer portion of a spiral member formed by spirally winding a single wire to one surface of the belt member, and the other surface of the belt member of the fin member faces the outer peripheral surface of the pipe member. A fin tube, wherein the fin member is brought into contact with each other and the fin member is wound around and fixed to the outer peripheral surface of the pipe member.   The fin tube according to claim 1, wherein the fin member is spirally wound around an outer peripheral surface of the tube member.   2. The fin tube according to claim 1, wherein a plurality of fin members are wound around the outer peripheral surface of the tube member in a ring shape and a plurality of fin members are arranged at intervals in the axial direction of the tube member.   3. The fin tube according to claim 1, wherein the pipe member is provided with a spiral groove on the outer peripheral surface, and a belt member of the fin member is disposed in the groove.   4. The pipe member according to claim 1 or 3, wherein an annular groove is formed in a plurality of locations on the outer peripheral surface at intervals in the axial direction, and a belt member of a fin member is disposed in the groove. Fin tube.   The fin tube according to claim 1, wherein the spiral member has a flat wound shape.   The fin tube according to claim 1 or 6, wherein the spiral member is fixed to one surface of the belt material by brazing, welding, or adhesion.   4. The fin tube according to claim 1, wherein the fin member is disposed on the pipe member with the other surface of the belt member in close contact with the outer peripheral surface of the pipe member.   4. The fin tube according to claim 1, wherein the fin member is disposed on the pipe member by fixing the other surface of the belt member to the outer peripheral surface of the pipe member by brazing, welding, or adhesion.   10. The fin tube according to claim 1, wherein an inner belt material is disposed on an inner portion of the spiral member on a belt material arrangement side of the spiral member.   The fin tube according to claim 1, 2, 3, 8, or 9, wherein the fin member has an inner wire disposed on an inner side of the spiral member on the belt material arrangement side.

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