JP2010256007A - Turn fin tube, manufacturing device of the turn fin tube, manufacturing method of the turn fin tube, and turn fin type heat exchanger using the turn fin tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turn fin tube easy to be processed, capable of increasing heat efficiency, and capable of decreasing production cost as well as decreasing the fraction defective in manufacturing, a turn fin type heat exchanger using the turn fin tube, a manufacturing device of the turn fin tube, and a manufacturing method of the turn fin tube. <P>SOLUTION: As shown in Fig.4, the turn fin tube includes a tube 20 for flowing fluid therein and a fin 13 spirally winded around an outside surface of the tube. The fin comprises a base part 11 contacting the tube and winded around the outside surface and an extension part 12 formed and extended to have a constant angle to a direction outside the tube from the base part. The tube has a spiral groove 21 formed to cave-in by being spirally press-fitted along the longitudinal direction. The base part can be fitted to the spiral groove. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a turn fin tube, a turn fin tube manufacturing apparatus, a turn fin tube manufacturing method, and a turn fin type heat exchanger using the turn fin tube, and more particularly, easy processing and thermal efficiency. TURN FIN TUBE, TURN FIN TYPE HEAT EXCHANGER, AND TURN FIN TUBE MANUFACTURING APPARATUS AND MANUFACTURING METHOD FOR REDUCING FAILURE RATE AND PRODUCTION COST It is.

  Generally, in a heat exchanger, heat is exchanged between a refrigerant flowing inside a tube and a fluid such as external air or cooling water where the tube is located.

  The condenser, which is one of the heat exchangers, releases the heat of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor to a fluid such as air and cooling water at room temperature. Is condensed and liquefied.

  The condenser is classified into a wire type condenser and a turn fin type condenser depending on the form. Here, the turn fin type condenser is wound around the outer periphery of the tube in order to increase the heat exchange surface area between the tube through which the refrigerant flows and the tube and a fluid such as external air or cooling water. It consists of fins.

  However, the fins installed in the conventional turn fin tube have a problem that the heat transfer area is small because the area of close contact with the tube is small due to the thin plate shape. Therefore, there was a structural limit to improving heat transfer efficiency. Therefore, a new fin shape design is required, and a turn fin tube manufacturing apparatus and manufacturing method capable of manufacturing the fin shape are required.

  An object of the present invention is to provide a turn fin tube which is excellent in workability and can improve heat transfer efficiency, a turn fin type heat exchanger using the same, a manufacturing apparatus and a manufacturing method of the turn fin tube. That is.

  Another object of the present invention is to provide a turn fin tube manufacturing apparatus and a manufacturing method capable of reducing the defective rate and reducing the production cost in manufacturing the turn fin tube.

  Yet another object of the present invention is to provide a turn fin tube and a turn fin condenser in which the fin height is reduced and the fin and tube are stably coupled.

  In order to achieve the above-described object, the present invention includes a tube through which a fluid flows inside and a fin spirally wound around the outer surface of the tube, and the fin is wound around an outer surface that contacts the tube. There is provided a turn fin tube having a base portion and an extension portion formed to extend from the base portion toward the outer side of the tube with a certain angle.

  Here, the tube has a spiral groove that is depressed in a spiral shape along the longitudinal direction, and the base portion can be fitted into the spiral groove.

  In the tube bend portion where the tube is bent, the extension portion is bent along the longitudinal direction of the tube from the first extension portion and the first extension portion extending outward from the tube. A second extension.

  Moreover, at least one part of said extension part located in the tube bend part where the said tube is bent can be installed in the cut | disconnected state.

According to another embodiment of the invention, the invention provides a tube supply unit for supplying a tube forming a hollow therein, a strip supply unit for supplying a strip; and
A fin forming unit for forming the strip into a fin that is spirally wound around the outer surface of the tube, the fin including a base portion provided on a surface in contact with the tube, and an outward direction of the tube from the base portion; An apparatus for manufacturing a turn fin tube is provided, which has an extension formed to extend at a certain angle.

  The turn fin tube manufacturing apparatus may further include a groove forming unit for press-fitting a spiral groove on the outer surface of the tube along the longitudinal direction of the tube so that the base portion can be fitted. .

  The turn fin tube manufacturing apparatus pressurizes the extension located at a tube bend portion where the tube is bent, and extends from the base portion to the outside of the tube with a certain angle. And a bending unit that forms a first extension and a second extension that is bent from the first extension in the longitudinal direction of the tube.

  The groove forming unit includes a press-fitting roller having a press-fitting blade for press-fitting a spiral groove in the tube along the longitudinal direction of the tube that is linearly moved while rotating; When the press-fitting blade presses the tube while rotating, a support roller assembly having a support roller that rotates in accordance with the rotation direction of the tube while supporting the tube on the other side of the tube may be included.

  The groove forming unit may further include a roller assembly moving device for moving the support roller assembly up and down.

  The groove forming unit may further include a tilting device for inclining the press-fitting blade in order to change a contact angle between the outer surface of the tube and the press-fitting blade.

  The turn fin tube manufacturing apparatus may further include a cutting unit for cutting out at least a part of the extension portion located at a tube bend portion where the tube is bent.

  According to another embodiment of the present invention, the present invention provides a tube supplying step for supplying a tube forming a hollow therein; a strip supplying step for supplying a strip; a base provided on a surface that contacts the tube with the strip And a fin forming step of forming a fin having an extension portion extending from the base portion with a certain angle in the outer direction of the tube; and spirally winding the fin around the outer surface of the tube A method of manufacturing a turn fin tube including a step of forming a turn fin tube is provided.

  The method for manufacturing the turn fin tube may further include a spiral groove forming step of press-fitting a spiral groove on the outer surface of the tube along the longitudinal direction of the tube so that the base portion can be fitted. .

  Further, the method of manufacturing the turn fin tube is such that the extension portion positioned at a tube bend portion where the tube is bent is pressed and extended from the base portion with a certain angle toward the outer side of the tube. The method may further include bending the turn fin tube to form a first extension formed and a second extension bent from the first extension in the longitudinal direction of the tube.

  The spiral groove forming step includes a tube transfer step of linearly moving the tube while rotating the tube; a step of bringing a support roller that rotates in accordance with the rotation direction of the tube into contact with an upper end surface of the tube; and the tube Pressurizing the lower outer surface of the tube against a rotating press-fit blade to press-fit the spiral groove into the tube along the longitudinal direction of the tube.

  The spiral groove forming step may further include a tilting step of inclining the press-fitting blade in order to change a contact angle between the outer surface of the tube and the press-fitting blade.

  In addition, the method of manufacturing the turn fin tube may further include a cutting step of cutting out at least a part of the extension portion located at a tube bend portion where the tube is bent.

  On the other hand, according to another embodiment of the present invention, the present invention supports a tube through which a fluid flows inside, a turn fin tube having fins wound spirally around the outer surface of the tube, and the turn fin tube. Provided is a turn fin type heat exchanger including a bracket. Here, the fin may have a base portion wound around an outer surface in contact with the tube, and an extension portion formed extending from the base portion with a certain angle in the outer direction of the tube.

  The effects of the turn fin tube and the turn fin type heat exchanger using the turn fin tube, the turn fin tube manufacturing apparatus, and the turn fin tube manufacturing method according to the present invention will be described as follows.

  First, there is an advantage that the overall height of the turn fin tube can be reduced by forming a spiral groove in which the base portion of the fin is fitted on the outer surface of the tube. Also, if the overall height of the turn fin tube is set in the same manner as in the prior art, the height of the extension can be increased as the base part is recessed and installed in the spiral groove. There is an advantage that the heat exchange area of the fin is increased.

  Second, by forming the fin into a base part and an extension part so that the base part comes into surface contact with the outer surface of the tube, there is an advantage that the area of surface contact is increased and heat exchange efficiency is increased. is there.

  Third, since the base portion of the fin is fitted in the spiral groove of the tube, there is an advantage that the fin does not idle on the outer surface of the tube and the connection with the tube is stably performed.

  The fourth fin has a base portion in surface contact with the tube, and is positioned on a first extension portion that is bent in the outer radial direction of the tube and a tube bend portion that is a portion where the tube is bent. The extending portion is formed in advance with a second bend portion that is bent along the tube bend portion, so that the bend load generated by the extension portion can be reduced when the turn fin tube is bent. And has the advantage of excellent workability. In other words, when the turn fin tube is bent, the tube is depressed when the extension portion disposed on the tube bend portion is processed into the first extension portion and the second extension portion in advance. The risk of breakage can be reduced, the defect rate of turn fin tubes can be reduced, and production costs can be reduced.

  Fifth, by forming the extension on the tube bend part of the turn fin tube into the first extension part and the second extension part, when bending the tube, the bend load is reduced and the heat exchange efficiency is increased. There is an advantage of letting. That is, when the turn fin tube is bent, the extension portion may be cut out in order to reduce the bend load, but in the present invention, the extension portion is not cut out, thereby improving workability and heat transfer efficiency. There is an advantage that can be increased.

  Sixth, in the step of inserting into the bracket to fix the bend turn fin tube, the second extension is bent so that the work can be performed smoothly without causing damage to the fin. There are advantages.

  The features and advantages of the present invention may be better understood with reference to the following accompanying drawings, as well as the following detailed description of embodiments of the invention.

The block diagram which shows the structure of one Example of the manufacturing apparatus of the turn fin tube which concerns on this invention. The top view which showed schematically the structure of the manufacturing apparatus of the turn fin tube of FIG. The figure which shows the manufacturing process in the 1st Example of the turn fin tube manufactured with the manufacturing apparatus of the turn fin tube of FIG. 1 in order of a process. The figure which shows the manufacturing process in the 2nd Example of the turn fin tube manufactured with the manufacturing apparatus of the turn fin tube of FIG. 1 in order of a process. The figure which shows the manufacturing process in the 3rd Example of the turn fin tube manufactured by the manufacturing apparatus of the turn fin tube of FIG. 1 in order of a process. Sectional drawing which shows the initial stage fin formation part of the fin formation unit with which the manufacturing apparatus of the turn fin tube of FIG. 2 was equipped. Sectional drawing which shows the last fin formation part of the fin formation unit with which the manufacturing apparatus of the turn fin tube of FIG. 2 was equipped. The sectional side view of the groove forming unit with which the manufacturing apparatus of the turn fin tube of FIG. 2 was equipped. The front sectional view which shows the principal part of the groove forming unit with which the manufacturing apparatus of the turn fin tube of FIG. 2 was equipped. Sectional drawing which showed the state before the extension part of a fin was shape | molded by the bending process unit with which the manufacturing apparatus of the turn fin tube of FIG. Sectional drawing which showed the state in which the extension part of the fin was shape | molded by the bending process unit with which the manufacturing apparatus of the turn fin tube of FIG.

  The above object will be described below with reference to the accompanying drawings, in which preferred embodiments of the present invention that can be specifically realized are provided.

  FIG. 1 is a block diagram showing the configuration of the turn fin tube manufacturing apparatus according to the present invention, and FIG. 2 is a plan view schematically showing the configuration of the turn fin tube manufacturing apparatus of FIG. FIG. 3 is a drawing showing the manufacturing process for the first embodiment of the turn fin tube manufactured by the turn fin tube manufacturing apparatus of FIG.

  1 to 3, a turn fin tube manufacturing apparatus according to the present invention includes a strip supply unit (100) for providing a flat strip (10), and the strip (10) as a base (11). A fin forming unit (400) formed on the fin (13) having the extension (12), a cutting unit (900) for cutting out a part of the extension (12), and a tube supply unit for supplying the tube (20) (500), a groove forming unit (600) for forming a spiral groove (21) on the outer surface of the tube (20), a rolling unit for rolling the extension (12) to cut out a part of the extension ( 700) is included.

  The strip (10) is a long and narrow flat plate made of a metal material, and the tube (20) forms a hollow so that fluid flows inside.

  The strip supply unit (100) includes a plurality of guide rollers (121, 122) arranged along a direction in which the strip (10) is supplied, and a portion in which the direction in which the strip (10) is supplied is changed. Including a turning roller (123) installed in As a result, the strip (10) is supplied to the fin forming unit (400) while moving along the guide rollers (121, 122) and the direction changing roller (123).

  The fin forming unit (400) includes a flat strip (10) formed as a fin (13) having the base (11) and the extension (12). It includes an initial fin forming section (200) and a final fin forming section (300) which are sequentially arranged along the transfer direction. Here, the bend angle of the base portion (11) bent from the final fin forming portion (300) is larger than the bend angle of the base portion (11) bent from the initial fin forming portion (200). Larger ones are preferred.

  As a result, the fin forming unit (400) includes a base portion for fitting the strip (10) supplied from the strip supply unit (100) into the spiral groove (21) of the tube (20). (11) and a fin (13) having an extension portion (12) formed to extend from the base portion (11) at a certain angle in the outer radial direction of the tube (20), for example, an L-shaped fin To form. A detailed process in which the fin forming unit (400) processes the strip (10) into an L-shaped fin (13) will be described later.

  In the cutting unit (900), a part of the extension (12) is formed along the longitudinal direction of the fin (13) to form a notch (14). The fin extension (12), in which the notch (14) is formed by the cutting unit (900), is rolled by the rolling unit (700), and is located above the extension (12). A portion of the extension (12) is cut off as a notch (14). That is, the fin arranged in the tube bend part (20a) is composed of the base part (11) and the extension part (12c) having the cutout.

  Of course, the present invention is not limited to the above-described embodiments, and a part of the extension may be completely separated by the cutting unit.

  The rolling unit (700) includes a first rolling roller assembly (710) disposed on both sides of the extension (12) to be transferred and rolling the extension (12), and a second rolling Includes a roller assembly (720). Here, the extension (12) passes between the first rolling roller assembly (710) and the second rolling roller assembly (720) while passing through the extension (12). Spiders may be formed.

  The reason why wrinkles are formed in the extension part (12) is that a control unit (not shown) is configured so that the rotation speed of the first rolling roller provided in the first rolling roller assembly (710) is This is because the rotation speed of the second rolling roller provided in the second rolling roller assembly (720) is controlled differently. As a result, the rolling unit (700) performs a role of rolling and cutting a part of the extension (12), and forms a ridge in the extension (12).

  The turn fin tube manufacturing apparatus includes a fin guide for supporting the fin (13) by setting a fixed position of the fin (13) while guiding the fin (13) to the rolling unit (700). A unit (420) is installed. The turn fin tube manufacturing apparatus is provided with a strip guide unit (410) for setting the fixed position of the strip while guiding the strip (10) to the fin forming unit (400).

  As a result, the strip guide unit (410) and the fin guide unit (420) cause the strip (10) to have an L-shaped fin (13) having the base portion (11) and the extension portion (12). ) Can be molded stably and naturally.

  Meanwhile, while the flat strip (10) is processed into the fin (13) and moved to the rolling unit (700), the tube (20) is moved by the tube supply unit (500). After being supplied to the groove forming unit (600) and processing the tube (20), it is supplied to a position adjacent to the rolling unit (700).

  The groove forming unit (600) press-fits the outer surface of the tube (20) to form a spiral groove (21) on the outer surface of the tube. That is, both the outer surface and the inner surface of the tube (20) are recessed, the spiral groove (21) is formed on the outer surface of the tube (20), and the inner surface of the tube (20) is formed on the inner surface of the tube (20). A spiral protrusion (23) is formed in the direction. The spiral protrusion (23) formed on the inner surface of the tube (20) forms a vortex in the fluid inside the tube, so that the heat exchange efficiency between the fluid inside the tube and the fins can be improved. The base portion (11) of the fin (13) is fitted into the spiral groove (21) of the tube (20) and is spirally wound around the outer surface of the tube (20). It is formed.

  According to the turn fin tube manufacturing apparatus of the present invention, first, the tube (20) and the fin (13) are simultaneously processed by different manufacturing units. That is, the fin (13) includes a base portion (11) that comes into contact with the tube (20) by the fin forming unit (400), and is fixed from the base portion (11) to the outside of the tube (20). It is processed through a fin forming step to form an extension (12) extending at an angle. At the same time, the spiral groove (21) is formed on the outer surface of the tube (20) by the groove forming unit (600).

  Here, the fin forming step includes a primary bend step in which a flat strip 10 is primarily bent by an initial fin forming portion 200, and a base portion of the fin that has undergone the primary bend step. It comprises a secondary bend stage in which (11) is bent by the final fin forming section (300). Finally, the shape of the fin is substantially L-shaped.

  Thereafter, the fin extension (12) passes through the rolling unit (700), and is arranged on both sides of the extension (12) to rotate and roll with a first rolling roller assembly (710) and Rolled by the second rolling roller assembly (720).

  At this time, the fin (13) passing through the rolling unit (700) is spirally wound around the outer surface of the tube (20). That is, the base portion (11) of the fin is fitted into the spiral groove (21) of the tube, and the fin (13) is wound around the outside of the tube (20) to form a turn fin tube.

  Here, before the fin (13) is wound around the outer surface of the tube (20), the operator brazes the base portion (11) of the fin and the outer surface of the tube (20). Or bond with other adhesives.

  The fin (13) is spirally wound around the outer surface of the tube as the tube (20) moves linearly while rotating. At this time, the linear moving speed at which the tube (20) is transferred is not constant, but is variable, so that the pitch of the fin around which the fin (13) is wound changes similarly. Become.

  As a result, the first embodiment of the turn fin tube manufactured by the above-described turn fin tube manufacturing apparatus includes a tube in which a fluid flows inside, and a fin spirally wound around the outer surface of the tube, The fin has a base portion (11) wound around an outer surface in contact with the tube, and an extension portion formed to extend from the base portion toward the outer side of the tube with a certain angle. Here, the tube has a spiral groove (21) that is depressed by being helically pressed along the longitudinal direction, and the base portion (11) is fitted into the spiral groove (21). The

  Then, at least a part of the extension portion located in the tube bend portion (20a) where the tube is bent is installed in a state where it is perforated.

  A turn fin type heat exchanger using the turn fin tube includes the turn fin tube and a bracket (not shown) for supporting the turn fin tube.

  A manufacturing process for a second embodiment of the turn fin tube manufactured by the turn fin tube manufacturing apparatus according to the present invention will be described with reference to FIGS.

  Unlike the first embodiment of the turn fin tube described above, the turn fin tube according to the present embodiment has a fin extension portion (12) on the tube bend portion (20a) in the region where the turn fin tube is bent. Is installed in a bent state without cutting.

  As a result, when manufacturing the turn fin tube according to the present embodiment, the cutting unit is not used, and the bending unit (800) for bending the fin extension located at the tube bend is used. .

  The bending unit (800) includes a pressing member (see FIG. 10) that is molded into the first extension (12a) and the second extension (12b) while pressing the extension (12). And a driving device (not shown) for driving the pressing member.

  When the turn fin tube is moved, a portion where the turn fin tube is bent by the bending unit (800), that is, an extension portion (12) positioned at the tube bend portion (20a) is One extension portion (12a) and the second extension portion (12b) are formed.

  The first extension portion (12a) is formed with an inclination angle from the base portion (11) of the fin toward the outside of the tube, and the second extension portion (12b) is formed with the first extension portion (12b). The extension portion (12a) is bent along the longitudinal direction of the tube (20).

  As a result, before the turn fin tube is bent, the turn fin tube is bent by pre-bending the second extension portion (12b) positioned at the tube bend portion (20a). Thus, the bend load applied to the tube bend portion (20a) can be reduced, and the tube (20) or the fin (13) can be prevented from being crushed or damaged. Further, by bending the second extension portion (12b) in advance, when the turn fin tube is fixed to the bracket, it is possible to work without damaging the fin.

  Further, when the turn fin tube is bent, the extension portion may be cut out in order to reduce the bend load. In the present invention, the extension portion is not cut out, thereby increasing heat transfer efficiency and processing. Sex can be increased.

  The time when the bending unit (800) operates is stored in advance in a control unit (not shown), and the region where the turn fin tube is bent, that is, the tube bend unit (20a) is in the above bending process. Operates when positioned on a unit.

  As a result, the second embodiment of the turn fin tube manufactured by the turn fin tube manufacturing apparatus described above includes a tube through which fluid flows inside and a fin spirally wound around the outer surface of the tube, The fin has a base portion wound around an outer surface in contact with the tube, and an extension portion formed to extend from the base portion with a certain angle in the outer direction of the tube. Here, the tube has a spiral groove that is recessed by being helically pressed along the longitudinal direction, and the base portion is fitted into the spiral groove.

  The extension portion includes a first extension portion that extends in an outer direction of the tube and a longitudinal direction of the tube from the first extension portion in a tube bend portion where the tube is bent. Has a second extension to be bent.

  A manufacturing process for a third embodiment of the turn fin tube manufactured by the turn fin tube manufacturing apparatus according to the present invention will be described with reference to FIGS.

  Unlike the turn fin tube of the second embodiment described above, the turn fin tube according to the present embodiment has the fin base portion (11) wound on the outer surface of the tube (20). That is, the tube according to the present embodiment is not formed with a spiral groove, and the base portion (11) of the fin is installed on the outer surface of the tube (20).

  As a result, the turn fin tube manufacturing apparatus according to the present embodiment does not use a groove forming unit for forming a spiral groove on the outer surface of the tube and a cutting unit for cutting out a part of the fin extension.

  With reference to FIG.2 and FIG.6, the initial fin formation part with which the fin formation unit which concerns on this invention was equipped is demonstrated concretely.

  The initial fin forming section (200) includes a first initial roller assembly (210) and a second initial roller assembly (220) installed at positions spaced apart from each other, and the first initial roller assembly (200). An initial interval adjusting device (230) is included for adjusting the interval between the assembly (210) and the second initial roller assembly (220).

  The first initial roller assembly (210) includes a first initial roller (211) rotated in close contact with the transported strip (10), and a rotation center shaft of the first initial roller (211). A first initial roller shaft (214) that forms the first initial roller shaft (215) that supports the first initial roller shaft (214), the first initial roller (211), and the first The first initial roller bearing (213) installed between the initial roller shaft (214) and the first initial roller shaft (214).

  Similarly, the second initial roller assembly (220) includes a second initial roller (221) rotated in close contact with the transported strip, and a rotation center of the second initial roller (221). A second initial roller shaft (224) that forms a shaft; a second initial roller frame (225) that supports the second initial roller shaft (224); the second initial roller (221); A second initial roller bearing (223) installed between the two initial roller shafts (224).

  Here, the upper end of the second initial roller (221) is installed with a step at a lower position at a predetermined distance from the upper end of the first initial roller (211), and the first initial roller (211 ) And the upper end of the second initial roller (221), the fin base (11) is formed.

  Specifically, a first roller edge (211a) is formed at the upper edge of the first initial roller (211) so as to protrude with a first inclination angle (x1). The second initial roller (221) as a whole has a cylindrical shape.

  As a result, the fin flowing between the upper edge of the first initial roller (211) and the upper end of the second initial roller (221) is bent at the first inclination angle (x1), The base portion (11) of the fin is formed.

  In addition, the initial interval adjusting device (230) includes a first interval adjusting bolt screwed into a first position adjusting block (216) provided at a lower portion of the first initial roller assembly (210). (231) included.

  By rotating the first distance adjusting bolt (231), the first position adjusting block (216) is moved in the horizontal direction, and the first position adjusting block (216) is moved, The first initial roller assembly (210) coupled to the first position adjustment block (216) is moved in the horizontal direction.

  As a result, the first initial roller assembly (210) moves in the horizontal direction on the left and right in FIG. 6, thereby causing the first initial roller (211) and the second initial roller (221) to move. The interval of is adjusted.

  With reference to FIG.2 and FIG.7, the last fin shaping | molding part with which the fin shaping | molding unit based on this invention was equipped is demonstrated concretely.

  The final fin forming section (300) includes a first final roller assembly (310) and a second final roller assembly (320) installed at positions spaced apart from each other, and the first final roller assembly. A final spacing adjustment device (330) for adjusting the spacing between the assembly (310) and the second final roller assembly (320);

  The first final roller assembly (310) includes a first final roller (311), a first final roller shaft (314), a first final roller frame (315), and a first final roller. Including a bearing (313), the second final roller assembly (320) includes a second final roller (321), a second final roller shaft (324), a second final roller frame (325), and A second final roller bearing (323) is included. The final distance adjusting device (330) includes a second distance adjusting bolt that is screwed with a second position adjusting block (316) provided at a lower portion of the first final roller assembly (310). (331) included. Detailed descriptions of these components will be omitted because they are similar to the configuration of the initial fin forming section (200) described above.

  However, a roller groove (311a) corresponding to the fin extension (12) is formed in the first final roller (311), and an upper edge of the first final roller (311) is formed on the upper end edge of the first final roller (311). A second roller edge (311b) is formed to protrude with a second inclination angle (x2). Here, the upper end of the second final roller (321) is provided with a step at a lower position spaced apart from the upper end of the first final roller (311) by a step so that the first final roller (311 ) And the upper end of the second final roller (321), the fin base (11) is formed.

  As a result, the fins that flow between the first final roller (311) and the second final roller (321) become the fin extension (12) fitted in the roller groove (311a). And a base portion (11) of the fin formed between the second roller edge (311b) and the upper end of the second final roller (321).

  Here, the bend angle (x2) of the base portion formed by the final fin forming portion (300) is formed larger than the bend angle (x1) of the base portion formed by the initial fin forming portion (200). Is done.

  With reference to FIG.2, FIG8 and FIG.9, it demonstrates concretely with respect to the groove forming unit with which the manufacturing apparatus of the turn fin tube which concerns on this invention was equipped.

  The groove forming unit (600) includes a press-fitting roller (632) having a press-fitting blade (631) for press-fitting a spiral groove into a tube, and the press-fitting blade (631) on one side of the tube (20). A support roller assembly (620) having a support roller (622) that rotates while supporting the tube (20) on the other side of the tube (20) when the tube (20) is pressurized while rotating.

  The groove forming unit (600) includes a roller assembly moving device (610) for moving the support roller assembly up and down, and a contact angle between the press-fitting blade and the tube. , A tilting device (640) for tilting the press-fitting blade (631).

  The press-fit roller assembly (630) includes a drive motor (not shown), a press-fit roller rotating shaft (633) rotated by the drive motor, a press-fit roller body (632) coupled to the press-fit roller rotating shaft, A press-fitting blade (631) is formed on the outer periphery of the press-fitting roller body (632) and contacts the outer surface of the tube (20).

  When the drive motor is rotated, the press-fitting roller rotating shaft (633) is rotated. When the press-fitting roller rotating shaft (633) is rotated, the press-fitting roller body (632) is rotated, and the press-fitting roller is rotated. The press-fitting blade (631) formed on the body (632) pressurizes the outer surface of the tube (20) while rotating.

  Then, the outer surface of the tube and the inner surface of the tube are both depressed, a spiral groove (21) is formed on the outer surface of the tube, and a spiral protrusion (23) is formed on the inner surface of the tube. . By fitting the base portion (11) of the fin into the spiral groove (21), the fin (13) does not idle on the outer surface of the tube (20), and the tube (20) Is stably coupled.

  The support roller assembly (620) includes a support roller (622) facing the press-fitting blade (631), a roller rotation shaft (621) serving as a rotation center of the support roller (622), and the roller A support block (623) coupled to the rotation shaft (621) and supporting the roller rotation shaft (621) is included.

  Here, the support roller (622) is installed on both sides of the upper end surface of the tube, and the support roller (622) rotates along the direction in which the tube moves while rotating (FIG. 9).

  The roller assembly moving device (610) includes a moving frame (615) coupled to the support block (623), a coupler (614) for coupling the support block (623) and the moving frame, A pneumatic cylinder (611) that moves the moving frame (615), a bushing (613) that guides the movement of the moving frame (615) while moving by the pneumatic cylinder (611), and a guide shaft (612) Including.

  When the pneumatic cylinder (611) is actuated, the moving frame (615) is moved up and down while the bushing (613) is moved up and down. Then, the support block (623) combined with the moving frame (615) moves, and the support roller (622) installed on the support block (623) moves up and down. That is, the distance between the support roller (622) and the press-fitting blade (631) is adjusted while moving up and down.

  The tilting device (640) includes a worm wheel (not shown) coupled to the press-fitting blade (631), a worm shaft (643) coupled to the worm wheel, and the worm shaft (643). A rotating shaft (642) for rotating and a handle (641) for rotating the rotating shaft (642) are included. When an operator turns the handle (641), the rotating shaft (642) rotates while rotating the worm shaft (643). When the worm shaft (643) rotates, the worm wheel rotates while the tube rotates. Twist the press-fitting blade (631) in contact with (20) to change its axis. As a result, the contact angle between the outer surface of the tube (20) and the press-fitting blade (631) changes.

  The groove forming unit (600) may be provided with a press-fitting roller moving device (650) for moving the press-fitting roller assembly (630) up and down. The press-fitting roller moving device (650) plays a role of adjusting a distance between the support roller (622) and the press-fitting roller (622). As a result, the distance adjustment between the support roller (622) and the press-fitting roller (622) is adjusted by the vertical movement of the support roller assembly (620) or the press roller (622) is moved up and down. It can be adjusted by movement.

  The process for producing the turn fin tube using the groove forming unit provided in the turn fin tube production apparatus according to the present invention will be briefly described as follows.

  When the tube (20) is supplied while being rotated and linearly moved by the tube supply unit (500), the groove forming unit (600) is moved along the longitudinal direction of the tube (20). ) Is formed by press-fitting a spiral groove (21).

  When forming the spiral groove (21) in the tube (20), a support roller assembly (620) having a support roller (622) that rotates in accordance with the rotation direction of the tube (20) is used as the tube (20). Contact pressure is applied to the upper end face of (20). Then, the press-fitting blade (631) presses the lower outer surface of the tube in order to press-fit the spiral groove (21) in the tube (20) along the longitudinal direction of the tube (20).

  At this time, in order to change the contact angle between the tube (20) and the press-fitting blade (631), the tilting device (640) is used to tilt the press-fitting blade (631). Can be made.

  On the other hand, the supplied strip includes a base part (11) fitted into the spiral groove (21) by the fin forming unit (400) and an outward direction from the base part (11) to the tube (20). It is formed into a fin (13) having an extension (12) that is extended with a certain angle. Then, after the fin (13) passes through the rolling unit (700), the base portion (11) of the fin is spirally wound around the spiral groove (21) of the tube to form a turn fin tube.

  As a result, the overall height of the turn fin tube can be reduced by forming the spiral groove (21) into which the fin base (11) is fitted on the outer surface of the tube (20). . Further, by making the base part (11) in surface contact with the spiral groove (21) of the tube, the area of the surface contact is increased and the heat exchange efficiency is increased.

  With reference to FIG.10 and FIG.11, the process by which a turn fin tube is bend | folded by the bending process unit with which the manufacturing apparatus of the turn fin tube which concerns on this invention was equipped is demonstrated.

  The bending unit (800) according to the present embodiment includes a pressing member (810) for pressing the fin extension (12), and a driving device (not shown) for driving the pressing member (810). Including. In the bending unit (800), the portion where the turn fin tube is bent in advance, that is, the tube bend portion is pressed so that the fin extension portion (12) becomes the first extension portion (12a) and the second extension portion (12a). Is formed into an extension (12b).

  Specifically, the pressing member (810) pressurizes the extension (12) while moving in the radial direction of the turn fin tube, and also moves the longitudinal direction of the turn fin tube while moving in the longitudinal direction of the turn fin tube. The extension (12) is pressurized. At this time, the inner surface of the pressing member (810) has an inclination angle so that the extension (12) is naturally bent in the longitudinal direction of the tube (10). .

  When the pressing member (810) pressurizes the extension (12), the end of the extension (12) that contacts the pressing member (810) is located on the inner surface of the pressing member (810). The bend starts in the longitudinal direction of the tube (20) according to the inclination angle. When a certain degree of bending is performed, the pressing member (810) moves in the longitudinal direction of the tube (20) to pressurize the extension (12) again. Of course, the tube may move in the longitudinal direction with respect to the pressing member.

  As a result, the extension part 12 is formed to extend from the first extension part 12a that is bent at a certain angle from the base part 11 and from the first extension part. The second extension (12b) is bent in the longitudinal direction of the tube. Of course, the manufacturer uses the above-mentioned pressing member to bend the above-mentioned extension part and form the first extension part (12a) and the second extension part (12b) directly by hand, without forming the first extension part (12a) and second extension part (12b). The extension can also be bent.

  On the other hand, each embodiment of the present invention as described above is configured to help understanding of the present invention, and is not limited to the embodiment described above. Various modifications are possible without departing from the above.

(10) Strip
(11) Base part
(12) Extension
(12a) First extension
(12b) Second extension
(12c) Extension
(13) Fin
(14) Notch
(20) Tube
(20a) Tube bend section
(21) Spiral groove
(23) Spiral protrusion
(100) Strip supply unit
(121, 122) Guide roller
(123) Direction change roller
(200) Initial fin forming part
(210) First initial roller assembly
(211) First initial roller
(211a) First roller edge
(213) First initial roller bearing
(214) First initial roller shaft
(215) First initial roller frame
(216) First position adjustment block
(220) Second initial roller assembly
(221) Second initial roller
(223) Second initial roller bearing
(224) Second initial roller shaft
(225) Second initial roller frame
(230) Initial interval adjustment device
(231) First spacing adjustment bolt
(300) Final fin forming part
(310) First final roller assembly
(311) First final roller
(311a) Roller groove
(311b) Second roller edge
(313) First final roller bearing
(314) First final roller shaft
(315) First final roller frame
(316) Second position adjustment block
(320) Second final roller assembly
(321) Second final roller
(323) Second final roller bearing
(324) Second final roller shaft
(325) Second final roller frame
(330) Final spacing adjustment device
(331) Second spacing adjustment bolt
(400) Fin forming unit
(410) Strip guide unit
(420) Fin guide unit
(500) Tube supply unit
(600) Grooving unit
(610) Roller assembly moving device
(611) Pneumatic cylinder
(612) Guide groove
(613) Bushing
(614) Joiner
(615) Moving frame
(620) Support roller assembly
(621) Roller rotation shaft
(622) Support roller
(623) Support block
(630) Press-fit roller assembly
(631) Press-fit blade
(632) Press-fitted roller
(632) Press-fit roller body
(633) Press-fitted roller rotating shaft
(640) Tilting device
(641) Handle
(642) Rotating shaft
(643) Worm shaft
(650) Press-fed roller moving device
(700) Rolling unit
(710) First rolling roller assembly
(720) Second rolling roller assembly
(800) Bending unit
(810) Press member
(900) Cutting unit

Claims (18)

A tube in which fluid flows inside and a fin spirally wound around the outer surface of the tube;
The fin has a base portion wound around an outer surface in contact with the tube, and an extension portion formed to extend from the base portion to the outer side of the tube with a certain angle.   2. The turn fin according to claim 1, wherein the tube has a spiral groove that is depressed in a spiral shape along a longitudinal direction, and the base portion is fitted into the spiral groove. tube.   In the tube bend portion where the tube is bent, the extension portion is bent along the longitudinal direction of the tube from the first extension portion and the first extension portion extending outward from the tube. The turn fin tube according to claim 1, further comprising a second extension.   The turn fin tube according to claim 2, wherein at least a part of the extension portion located in a tube bend portion where the tube is bent is installed in a perforated state. A tube supply unit for supplying a tube forming a hollow inside;
A strip supply unit for supplying the strip; and
A fin forming unit for forming the strip into a spiral wound around the outer surface of the tube;
The fin includes: a base portion provided on a surface in contact with the tube; and an extension portion formed to extend from the base portion with a certain angle in an outer direction of the tube. Manufacturing equipment.   The turn fin tube manufacturing apparatus according to claim 5, further comprising a groove forming unit for press-fitting a spiral groove on an outer surface of the tube along a longitudinal direction of the tube so that the base portion can be fitted.   A first extension part that is formed to extend from the base part at a certain angle toward the outer side of the tube by pressing the extension part located at a tube bend part where the tube is bent; The turn fin tube manufacturing apparatus according to claim 5, further comprising a bending unit that forms a second extension portion that is bent in the longitudinal direction of the tube by the first extension portion. The above groove forming unit is
A press-fitting roller having a press-fitting blade for press-fitting a spiral groove in the tube along the longitudinal direction of the tube that is linearly moved while rotating; and
A support roller having a support roller that rotates in accordance with the direction of rotation of the tube while supporting the tube on the other side of the tube when the tube is pressurized while the press-fitting blade rotates on one side of the tube The apparatus for producing a turn fin tube according to claim 6 including an assembly.   9. The turn fin tube manufacturing apparatus according to claim 8, wherein the groove forming unit further includes a roller assembly moving device for moving the support roller assembly up and down.   9. The turn fin tube manufacturing apparatus according to claim 8, wherein the groove forming unit further includes a tilting device for inclining the press-fitting blade in order to change a contact angle between the outer surface of the tube and the press-fitting blade. .   6. The apparatus for producing a turn fin tube according to claim 5, further comprising a cutting unit for cutting out at least a part of the extension portion located at a tube bend portion where the tube is bent. A tube supply stage for supplying a tube forming a hollow inside;
Strip feeding stage for feeding strips;
A fin forming step of forming the strip into a fin having a base portion provided on a surface in contact with the tube, and an extension portion formed to extend from the base portion at a certain angle in an outer direction of the tube; and
A method for manufacturing a turn fin tube, comprising: forming a turn fin tube by spirally winding the fin around an outer surface of the tube.   The manufacturing method of the turn fin tube of Claim 12 which further includes the spiral groove formation step which press-fits the spiral groove of the outer surface of the said tube along the longitudinal direction of the said tube so that the said base part can be fitted.   A first extension part that is formed to extend from the base part at a certain angle toward the outer side of the tube by pressing the extension part located at a tube bend part where the tube is bent; The method of manufacturing a turn fin tube according to claim 12, further comprising a step of bending the turn fin tube to form a second extension portion that is bent from the first extension portion in the longitudinal direction of the tube. The above spiral groove forming step is:
A tube transfer step in which the tube is moved linearly while rotating;
Contacting a support roller that rotates in accordance with the direction of rotation of the tube with the upper end surface of the tube; and
14. The method of manufacturing a turn fin tube according to claim 13, comprising the step of pressurizing the lower outer surface of the tube to a press-fitting blade that rotates in order to press-fit a spiral groove in the tube along the longitudinal direction of the tube.   The manufacture of the turn fin tube according to claim 15, wherein the spiral groove forming step further includes a tilting step of tilting the press-fitting blade to change a contact angle between the outer surface of the tube and the press-fitting blade. Method.   The method of manufacturing a turn fin tube according to claim 12, further comprising a cutting step of cutting out at least a part of the extension portion located at a tube bend portion where the tube is bent.   A turn fin type heat exchanger comprising: the turn fin tube according to any one of claims 1 to 4; and a bracket for supporting the turn fin tube.

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