KR101016696B1 - turn fin type heat exchanger and manufacturing method for turn fin type heat exchanger - Google Patents

Abstract

The present invention relates to a turn fin type heat exchanger having improved productivity and heat exchange efficiency and a method of manufacturing the same. Turn-type heat exchanger according to an embodiment of the present invention comprises a tube, a fin and a fixing member. Here, the fluid moves inside the tube. The fin is formed in a predetermined width to increase the contact area with the outer circumferential surface of the tube to form a predetermined pitch while being tightly wound on the outer circumferential surface of the tube, while contacting along the longitudinal direction of the tube and having one end bent in the radial direction of the tube. And a disk connected to one end of the base and extending in the radial direction of the tube. And, the fixing member is coupled to the bent tube so that the shape of the tube is repeatedly bent at a predetermined length interval with respect to one direction, the pin is wound continuously to the tube, the coil is wound so as to vary the pitch by a predetermined section of the tube, In the bent portion, the disc is easily separated from one end of the base, and a recess is formed in a groove shape in a portion where the base and the disc are connected so that only the base remains wound on the tube.

 Heat exchanger, turnpin, tube, pitch, banding

Description

Turn fin type heat exchanger and manufacturing method thereof {turn fin type heat exchanger and manufacturing method for turn fin type heat exchanger}

The present invention relates to a turn fin type heat exchanger and a method of manufacturing the same, and more particularly, to a turn fin type heat exchanger having improved productivity and heat exchange efficiency and a method of manufacturing the same.

In general, a refrigeration system is a system in which refrigerant moving along a compressor, condenser, expansion valve, and evaporator circulates through a thermodynamic cycle to absorb heat from the room and release it to the outside. It is called.

In the heat exchanger, heat exchange is performed between a refrigerant flowing inside the tube and a fluid such as external air or cooling water where the tube is located.

On the other hand, the condenser condenses and liquefies the refrigerant by releasing the heat of the high-temperature, high-pressure gaseous refrigerant discharged from the compressor to a fluid such as air and cooling water at room temperature. It is divided into wire type condenser and turn fin type condenser.

Here, the turn-pin condenser is composed of a fin (held) spirally wound along the circumference of the tube in order to increase the heat exchange surface area between the tube through which the refrigerant flows inside and the fluid such as the outside air or cooling water.

And, the tube is bent or to form a variety of shapes, the bent tube is fixed to the fixing member is maintained in shape.

1 is a front view illustrating a conventional turn fin type heat exchanger, and FIG. 2 is an exemplary view showing a coupling state between a fin and a tube in a conventional turn fin type heat exchanger.

As shown in FIGS. 1 and 2, a conventional turn fin type heat exchanger includes a tube 210 in which fluid moves inward, and a fin 220 wound in a spiral shape to the tube 210.

Here, the tube 210 is bent in a zigzag shape to form a straight portion (D) and the bending portion (B), the fin 220 is wound to form a constant pitch (P) on the tube (210) do.

At this time, the fin 220 is formed in the shape of a thin thin plate (薄板) and the adhesion area with the tube 210 is small, so that the heat transfer area with the tube 210 can not be widened, thereby improving the heat transfer efficiency There was a problem with structural limitations.

In addition, the straight portion (D) and the pin 220 wound around the bending portion (B) are also wound separately, and the straight portion (D) and the bending portion (B) are welded to each other (W). By bonding, there was a problem that the operation of winding the pin 220 to the tube 210 can not be made continuously.

In addition, since the straight portion (D) and the bending portion (B) are welded (W) bonded, there is a problem that the number of steps is increased and complicated by leak inspection and the like to be welded further.

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a turn fin type heat exchanger and a method of manufacturing the improved productivity and heat exchange efficiency.

In order to achieve the above technical problem, the present invention is a tube for moving the fluid inward; It is formed in a predetermined width so as to increase the contact area with the outer peripheral surface of the tube to form a predetermined pitch while being in close contact with the outer peripheral surface of the tube, the contact along the longitudinal direction of the tube and one end in the radial direction of the tube A pin having a base formed by bending and a disk connected to one end of the base and extending in a radial direction of the tube; And a fixing member coupled to the tube, which is bent so that the shape of the tube repeatedly bent at a predetermined length interval with respect to one direction is fixed. The pitch is fluctuated so that the disc is easily separated from one end of the base at the portion where the tube is bent so that the base and the disc are connected to each other so that only the base is wound around the tube. Provided is a turn fin heat exchanger in which a recess is formed concave.

Here, it is preferable that the disc is partially press-fitted to form a wrinkle portion.

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In addition, the present invention has a predetermined width so as to increase the contact area with the outer peripheral surface of the tube, one end is vertically bent is formed from the base, and one end of the base is formed extending from the recess formed in the groove shape Manufacturing a pin comprising a disk; The pin is in close contact with the outer circumferential surface of the tube to be wound continuously; Banding the tube; Removing the disk relative to the recess so that only the base remains in a portion where the tube is bent; And fixing the shape of the bent tube by coupling a fixing member to a portion where the tube is bent.

Here, it is preferable that the disc is partially press-fitted to form a wrinkle portion.

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Referring to the effect of the turn-type heat exchanger and the manufacturing method according to the invention as follows.

First, one side of the fin is formed to increase the contact area with the tube can be increased heat exchange efficiency with the tube.

Second, since the fins may be wound differently by a predetermined section, one turn fin type heat exchanger may have fins having different pitches, and accordingly, the fins may be applied in various shapes according to the conditions of the device to which the turn fin type heat exchanger is installed. This is possible.

Third, not only the pin is continuously wound on the tube, but also the banding operation of the tube can be performed while the pin is wound by removing the height portion of the pin when the tube is bent, so that the product itself can be banded without a welding process.

Fourth, the welding process is not required when the tube is bent, so that the number of processes and the inspection process can be simplified, and the production efficiency can be increased.

Fifth, the pleats are formed in the fin to turbulence the air flow moving outside of the turn fin type heat exchanger can further improve heat exchange efficiency.

With reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above technical problem will be described.

3 is an exploded perspective view showing a turn fin heat exchanger according to a first embodiment of the present invention, FIG. 4 is a plan view showing a turn fin heat exchanger according to a first embodiment of the present invention, and FIG. 5 is a first embodiment of the present invention. 6 is a front view illustrating a turn fin type heat exchanger according to an example, and FIG. 6 is a cross-sectional view illustrating a state of a fin wound in a straight tube in the turn fin type heat exchanger according to the first embodiment of the present invention, and FIG. Fig. 1 is a cross-sectional view showing the state of the fin wound on the tube bent in the turn fin type heat exchanger according to the embodiment.

As shown in FIGS. 3 to 7, the turn fin type heat exchanger preferably includes a tube 10 and a fin 20. Here, the fin 20 is wound around the tube 10 in which fluid is moved to form a predetermined pitch. At this time, the fin 20 is preferably wound on the tube 10 continuously. Through this, the number of processes can be reduced and productivity can be improved. In addition, the fin 20 is preferably wound so that the pitch is changed by a predetermined section of the tube 10, in particular, the fin (20) from the pin 20 is wound around the portion to be bent the tube (10) Preferably, the height portion of 20) is removed. Through this, the bending of the tube 10 can be made even in the state in which the pin 20 is wound, thereby enabling continuous production without a welding process.

In detail, the pin 20 is wound around the outer circumferential surface of the tube 10 in which the fluid moves inward, wherein the pin 20 preferably includes a base 21 and a disk 25.

First, the base 21 is formed in a predetermined thickness and a predetermined width to be in close contact with the outer circumferential surface of the tube 10 along the longitudinal direction of the tube 10 to be wound while forming a predetermined pitch 22 ), And one end of the contact portion 22 is preferably formed to include a connecting portion 23 formed to be bent in the radial direction of the tube (10).

As such, the contact area with the outer circumferential surface of the tube 10 may be increased by the adhesion part 22, so that the heat transfer rate between the base 21 and the tube 10 may be improved.

In addition, a portion of the close contact portion 22 is bent to form the connecting portion 23, so that the flexural strength of the base 21 can be improved, and through this, the base 21 of the base 21 with respect to the tube 10 can be improved. Cohesion can be improved.

In addition, the disk 25 is preferably connected to the connecting portion 23 and extends in the radial direction of the tube 10. Accordingly, more efficient heat exchange between the tube 10 and the fin 20 is achieved. Will be done.

On the other hand, it is preferable that the fin 20 made as described above is continuously wound on the outer circumferential surface of the tube 10, and in this case, the pin 20 is wound so that the pitch is varied by a predetermined section of the tube 10. Is desirable.

In detail, the pin 20 is wound along the longitudinal direction of the tube 10, and wound around the first pitch P1 in the first section D1, and the second pitch P2 in the second section D2. In the third section D3 and the fourth section D4, the third pitch P3 and the fourth pitch P4 may be wound.

In the fifth section B1, it is preferable to wind the fifth pitch P5.

Here, the fifth section B1, which is a portion where the tube 10 is bent, is the first, second, third, and fourth sections D1, D2, D3, and D4, which are sections in which the tube 10 forms a straight line. It can be formed between.

As such, the pins 20 may be continuously wound while forming the corresponding pitches P1, P2, P3, P4, and P5 according to the sections D1, D2, D3, D4, and D5. The continuous winding of the pins can be made possible to have a pitch that is multiplied in the tube of the tube.

And through this, it is possible to manufacture a turn fin type heat exchanger having an appropriate pitch according to the conditions of the device to be installed the turn fin type heat exchanger.

For example, various applications are possible such that a portion having a small pitch is positioned in a flow direction of air moving outside of the turn-fin heat exchanger, or a portion having a large pitch is positioned therein. By reducing the resistance, the heat exchange efficiency can be further improved.

On the other hand, it is preferable that the disk 25 is removed (separated) from the base 21 in the pin 20 wound around the fifth section B1 where the tube 10 is bent.

In this case, a portion 29 to which the connecting portion 23 and the disk 25 are connected may be formed so that the disk 25 may be easily removed from the base 21.

Through this, the base 21 from which the disk 25 is separated can be maintained in a constant shape.

Therefore, only a portion of the base 21 remains wound around the tube 10 at a portion where the tube 10 is bent, and even after the disk 25 is separated, the base 21 remains in the tube ( The base 21 is preferably formed to a predetermined thickness and width such that the base 21 can have sufficient strength to be fixed to the tube 10 so as to maintain the state coupled to the tube 10.

And, through this, the fifth section B1 may be able to bend while the pin in the state in which the disk 25 is removed is coupled.

Here, the pitch P5 of the pin wound around the fifth section B1 is relatively larger than the pitches P1, P2, P3, P4 of the pin wound around each of the straight sections D1, D2, D3, and D4. It is preferable to form large.

As such, by minimizing the length of the pin coupled to the fifth section B1, the process of removing the disk 25 can be reduced, so that productivity can be improved, and the amount of the pin 20 required is reduced. As a result, production costs can be reduced.

In addition, the bending of the tube 10 in the state in which the pin 20 is wound, so that the straight portion (D1, D2, D3, D4) and the bending portion (B1) of the tube 10 may be integrally formed. Since it is not necessary to weld-join the straight portion and the bending portion as described above, the welding process becomes unnecessary, so that the number of manufacturing steps can be reduced, and the productivity can also be improved.

In addition, since there is no welded portion on the bending portion of the tube, an inspection process for the welded portion (eg, leak inspection, leak pressure inspection of the welded portion, etc.) may also be unnecessary, thereby further improving production efficiency.

Here, the sections D1, D2, D3, D4, and B1 and the pitches P1, P2, P3, P4, and P5 according to the sections may be variously modified.

Meanwhile, the tube 10 may be repeatedly bent at a predetermined length interval in one direction, and the fixing member 30 is further coupled to the tube 10 so that the shape of the tube 10 may be fixed. Can be.

To this end, it is preferable that the coupling member 35 is formed through the fixing member 30 in a size, a position, and a number corresponding to the bending portion of the tube 10 and the base 21 coupled to the bending portion. Do.

In addition, the bending portion of the tube 10 may be inserted into the through hole 35 so that the fixing member 30 may maintain the shape of the tube 10. Since the configuration of the member 30 can be simplified, it is possible to reduce the parts and to reduce the weight, and thus the manufacturing process can be simplified.

Meanwhile, the tube 10 and the fin 20 may be made of any one of a steel material, an aluminum material, and a copper material.

And, if the tube 10 is made of a steel material, it is preferable that the corrosion-resistant plating is further made to improve the corrosion resistance.

FIG. 8 is a front view showing the fin of the turn fin type heat exchanger according to the first embodiment of the present invention. As shown in FIG. 8, a pleat 28 is preferably formed in the disk 25.

Here, the wrinkles 28 may be partially formed on the disk 25, but the shape and number of the wrinkles 28 are not particularly limited.

In addition, the pleats 28 may be formed by adjusting the rolling amount and the rolling angle of the disk 25.

As such, by forming the pleats 28 on the disk 25, it is possible to turbulence the flow of air moving outside the turn fin type heat exchanger, thereby further increasing heat exchange efficiency.

9 is a flowchart illustrating a manufacturing step of the turn-fin heat exchanger according to the first embodiment of the present invention, Figure 10 is a pitch of the fins in the tube section of the turn-fin heat exchanger according to the first embodiment of the present invention 11 is an exemplary view illustrating a wound shape, and FIG. 11 is a disk of a turn fin-type heat exchanger according to a first embodiment of the present invention, in which a fin is wound at a different pitch for each section, and then a disk is removed from the fin wound on the bending portion. Figure 12 is an exemplary view showing the shape, Figure 12 is the fin of the turn fin-type heat exchanger according to the first embodiment of the present invention after winding the pin to form a different pitch for each section, the disk is removed from the pin wound around the bending portion and the tube is An exemplary view showing a bent state.

9 to 12, first, a base 21 having a predetermined width so as to increase the contact area with the outer circumferential surface of the tube 10, one end of which is vertically bent, and connected to the one end thereof. It is preferable that the step (S110) of manufacturing the pin 20 including the disk 25 is formed to extend.

Here, by adjusting the rolling amount and the rolling angle of the disk 25, the disk 25 may be partially pressed into the disk 25 to form a wrinkle portion (see 28 of FIG. 8).

The pin 20 formed as described above is preferably in close contact with the outer circumferential surface of the tube 10 and continuously wound to achieve a predetermined pitch (S120).

At this time, the pin is preferably wound so that the pitch is changed by a predetermined section of the tube.

That is, as shown in FIG. 10, the pin 20 is wound around the first pitch P1 in the first straight section D1 and wound around the second pitch P2 in the second straight section D2. In the third straight section D3, it is preferable to wind the third pitch P3 to be formed.

In addition, in the first bending section B1 and the second bending section B2, it is preferable to wind the fifth pitch P5, respectively.

In this case, it is preferable that the pin 20 is wound continuously while forming the pitches P1, P5, P2, P5, and P3 for each of the sections D1, B1, D2, B2, and D3.

Then, it is preferable that the step S130 of removing the disk 25 from the pin 20 wound around the portions B1 and B2 where the tube 10 is to be bent is performed.

That is, as shown in FIG. 11, in the pin 20 wound around each of the bending sections B1 and B2, the disk 25 is removed (or separated) so that only the base 21 is wound. This is preferred.

In addition, it is preferable that the step S140 of bending the tube is performed for each of the bending sections B1 and B2.

In addition, as shown in Figure 12, each of the straight section (D1, D2, D3) and the bending section (B1, B2) and each pitch (P1, P2, P3, P4, P5) is to be installed the turn fin type heat exchanger Of course, it can be made in various ways depending on the device.

In addition, the fixing member (see 30 in FIG. 3) is further coupled to the portion where the tube 10 is bent so that the shape of the tube 10 is fixed (S150).

Meanwhile, the disk 25 may be removed from the base 21 after the tube 10 is bent.

For example, after the tube 10 is bent while the pin 20 is wound, it is possible to remove the disk from the pin wound around the banded section.

As such, removal of the disk 25 may optionally be made before or after bending of the tube 10 and is not limited to a specific process sequence.

Meanwhile, the turn fin type heat exchanger may be applied to an oil cooler used in a transportation equipment such as a vehicle as well as a condenser or an evaporator.

FIG. 13 is a plan view showing an example in which the turn fin type heat exchanger according to the first embodiment of the present invention is applied to an oil cooler, and FIG. 14 is an example in which the turn fin type heat exchanger according to the first embodiment of the present invention is applied to an oil cooler. 13 and 14, the turn fin type heat exchanger consisting of the tube 10a and the fin 20 may be applied as an oil cooler.

Here, fixing members 30a may be coupled to both ends of the tube 10a to fix the shape of the tube 10.

Therefore, the pin 20 wound around the bending portion B 'of the tube 10a may be coupled without the disk 25 being removed.

Of course, a separate fixing member may be further coupled to the bending portion B 'of the tube 10a. In this case, the fixing member may be wound around the bending portion B' so that the fixing member may be easily coupled. The disk 25 can be removed from the pin 20.

15 is a cross-sectional view showing a state of a fin wound in a straight tube in a turn fin heat exchanger according to a second embodiment of the present invention, and FIG. 16 is a banded heat exchanger in a turn fin heat exchanger according to a second embodiment of the present invention. A cross-sectional view showing the state of a pin wound around a tube in a state. In the turn fin type heat exchanger according to the present embodiment, a recess is formed at a portion where the base and the disc are connected, and the other construction is the same as the first embodiment described above, and thus description thereof is omitted.

As shown in FIGS. 15 and 16, a recess 129 may be formed at a portion where the base 121 and the disk 125 are connected to each other so that the disk 125 is easily separated from the connecting portion 123.

Here, the recess 129 is preferably formed to reduce the thickness of the portion where the connecting portion 123 and the disk 125 contact.

Through this, the disk 125 may be easily separated from the base 121, and the shape of the base 121 after the disk 25 is separated may be maintained constant and stable. .

The concave portion 129 may be formed by a forming process such as roll forming when forming the fin 120, but is not necessarily limited to this forming method, and various and appropriate forming methods may be applied. to be.

Herein, reference numeral 10 denotes a tube and 122 denotes a connection portion.

As described above, the present invention is not limited to the above-described specific preferred embodiments, and various modifications by those skilled in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Implementations are possible and such variations are within the scope of the present invention.

1 is a front view showing a conventional turn fin type heat exchanger.

Figure 2 is an exemplary view showing a coupling state of the fin and the tube in a conventional turn fin type heat exchanger.

Figure 3 is an exploded perspective view showing a turn fin type heat exchanger according to the first embodiment of the present invention.

Figure 4 is a plan view showing a turn-fin heat exchanger according to a first embodiment of the present invention.

5 is a front view showing a turn-fin heat exchanger according to a first embodiment of the present invention.

6 is a cross-sectional view showing a state of a fin wound in a straight tube in the turn-fin heat exchanger according to the first embodiment of the present invention.

7 is a cross-sectional view illustrating a state of a fin wound on a tube bent in the turn fin type heat exchanger according to the first embodiment of the present invention.

8 is a front view showing the fin of the turn-fin heat exchanger according to the first embodiment of the present invention.

9 is a flowchart illustrating a manufacturing step of a turn-fin heat exchanger according to a first embodiment of the present invention.

10 is an exemplary view showing a shape in which the fins are wound to form a different pitch for each section of the tube of the turn-fin heat exchanger according to the first embodiment of the present invention.

11 is an exemplary view showing a shape in which the disk is removed from the pin wound around the bending portion after the fins are wound at different pitches in the tube of the turn fin type heat exchanger according to the first embodiment of the present invention.

12 is an illustration showing a state in which a disk is removed from the pin wound around the banding portion and the tube is bent after the fins are wound at different pitches per section in the tube of the turn-type heat exchanger according to the first embodiment of the present invention. Degree.

Figure 13 is a planar view showing an example in which the turn fin type heat exchanger according to the first embodiment of the present invention is applied to an oil cooler.

Figure 14 is a front view showing an example in which the turn fin type heat exchanger according to the first embodiment of the present invention is applied to an oil cooler.

15 is a cross-sectional view showing a state of a fin wound in a straight tube in a turn fin type heat exchanger according to a second embodiment of the present invention.

16 is a cross-sectional view illustrating a state of a fin wound on a tube bent in a turn fin type heat exchanger according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10,10a, 210: Tube 20,120,220: Pin

21,121: Base 22,122: Contact Part

23,123 connection 25,125 disk

28: wrinkles 30, 30a: fixing member

35: coupling hole 129: recess

Claims (10)

A tube through which fluid moves; It is formed in a predetermined width so as to increase the contact area with the outer peripheral surface of the tube to form a predetermined pitch while being in close contact with the outer peripheral surface of the tube, the contact along the longitudinal direction of the tube and one end in the radial direction of the tube A pin having a base formed by bending and a disk connected to one end of the base and extending in a radial direction of the tube; And It is made to include a fixing member coupled to the bent the tube so that the shape of the tube is repeatedly bent at a predetermined length interval with respect to one direction, The pin is continuously wound to the tube, and the pitch is changed by a predetermined section of the tube. At the portion where the tube is bent, the disk is easily separated from one end of the base so that only the base is attached to the tube. A turn fin type heat exchanger having recesses formed in a groove shape in a portion where the base and the disk are connected to remain in a wound state. delete The method of claim 1, The disk is a turn-pin heat exchanger, characterized in that the disk is partially indented to form a pleat. delete delete delete Including a base having a predetermined width so as to increase the contact area with the outer peripheral surface of the tube, one end is vertically bent and a disk extending from the recess formed in the groove shape at one end of the base Manufacturing a pin made; The pin is in close contact with the outer circumferential surface of the tube to be wound continuously; Banding the tube; Removing the disk relative to the recess so that only the base remains in a portion where the tube is bent; And And coupling a fixing member to a portion where the tube is bent to fix the shape of the bent tube. delete The method of claim 7, wherein The disk is partially press-fitted, the manufacturing method of the turn fin type heat exchanger, characterized in that the wrinkle portion is formed. delete

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