KR20090033926A - Dualpipe type heat exchanger and method for menufacturing the same - Google Patents

Dualpipe type heat exchanger and method for menufacturing the same Download PDF

Info

Publication number
KR20090033926A
KR20090033926A KR1020070098994A KR20070098994A KR20090033926A KR 20090033926 A KR20090033926 A KR 20090033926A KR 1020070098994 A KR1020070098994 A KR 1020070098994A KR 20070098994 A KR20070098994 A KR 20070098994A KR 20090033926 A KR20090033926 A KR 20090033926A
Authority
KR
South Korea
Prior art keywords
tube
heat exchanger
inner tube
double
fluid
Prior art date
Application number
KR1020070098994A
Other languages
Korean (ko)
Inventor
이상복
Original Assignee
주식회사 대흥금속
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 대흥금속 filed Critical 주식회사 대흥금속
Priority to KR1020070098994A priority Critical patent/KR20090033926A/en
Publication of KR20090033926A publication Critical patent/KR20090033926A/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/027—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers by helically or spirally winding elongated elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Abstract

A dual pipe type heat exchanger and a manufacturing method thereof are provided to prevent the damage of a helical fin protruded from an inner tube while inserting the inner tube. A dual pipe type heat exchanger comprises an outer tube(210), and an inner tube(260) inserted within the outer tube. The outer tube has a space of a first fluid, a space(212) of a second fluid, and a first inlet(220) for the first fluid and a first outlet(230) formed at both end parts. The inner tube has a plurality of helical fin(262) formed along the outer wall perimeter of a cylindrical pipe, and a second inlet(240) and a second outlet(250) formed at both end parts for the second fluid.

Description

Double tube heat exchanger and its manufacturing method {DUALPIPE TYPE HEAT EXCHANGER AND METHOD FOR MENUFACTURING THE SAME}

The present invention relates to a heat exchanger used in a heater, a cooler, an evaporator, a condenser, and the like and a manufacturing method thereof.

In general, the heat exchanger is a device that allows heat exchange between two different fluids, and is generally provided as a double tube including an outer tube and an inner tube accommodated therein. Therefore, heat exchange is performed between the first fluid flowing inside the outer tube and the second fluid flowing inside the inner tube.

The double tube heat exchanger is used to perform heat exchange between water and a refrigerant in a water-cooled air conditioning system, or to perform heat exchange between a first refrigerant and a second refrigerant in a multiple refrigeration system.

The double tube heat exchanger according to the prior art has a disadvantage in that heat exchange performance is limited because a relatively small inner tube is inserted into the structural appearance. Accordingly, in order to improve heat transfer or heat exchange performance, the overall length of the double tube heat exchanger or the size of the double tube heat exchanger should be increased.

The structure of the conventional double tube heat exchanger according to this will be described.

1 is an example showing the internal structure of a double exchanger according to the prior art.

In the conventional double tube heat exchanger illustrated in FIG. 1, a plurality of inner tubes 22 are inserted into a relatively large diameter outer tube 10, and the inner tubes 22 are connected to and supported by a spacer 24. .

Therefore, the heating water flowing through the inlet of the outer casing 10 passes through the inner space 12 of the outer casing 10 and flows out through the outlet, and the blood flowing through the inlet tubes of the inner tubes 22 during this process. The heat is exchanged between the heated and the heated object by the heating, and the heated object flows out through the outlet pipes of the inner tubes 22 while the heat is generated.

However, since the conventional double tube heat exchanger illustrated in FIG. 1 has a large number of inner tubes 22 and a separation distance between them is to be maintained, there is a limit in miniaturizing the size of the exterior 10.

That is, considering the heat exchange performance, it is difficult to miniaturize the double tube heat exchanger. On the contrary, if the double tube heat exchanger is manufactured in consideration of the size and the material cost of the double tube heat exchanger, the heat exchange performance is deteriorated.

In addition, there is a disadvantage in that the manufacturing process for combining the inner spacer 24 and the inner tubes 22 is complicated, thereby increasing the manufacturing process time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and while providing a double tube heat exchanger and a method of manufacturing the same, which can reduce the unit cost by simplifying the manufacturing operation while improving heat exchange performance and at the same time miniaturizing the size of the exchanger. It is a task.

Double tube heat exchanger according to the present invention for achieving the above technical problem, the first fluid and the first fluid inlet and outlet in which the first fluid is introduced and discharged on one side and the other side is the appearance ; And an inner tube embedded in the outer side and having an inner flow space of the second fluid, wherein the inner tube includes: a plurality of spiral fins formed around a cylindrical outer wall of the cylindrical tube; A first inlet formed at one end of the cylindrical tube to receive the second fluid; And a second outlet through which the second fluid flows out at the other end of the first inlet.

According to an example of the present invention, an outer diameter of the inner tube including the spiral fins may be the same as or smaller than the inner diameter of the outer appearance.

According to an example of the present invention, the plurality of spiral fins may be provided in the form of a coil wound along the outer wall of the cylindrical tube.

According to another example of the present invention, the plurality of spiral pins may be provided in the form of a through ring fitted through the cylindrical tube.

According to another example of the present invention, the plurality of spiral pins may be provided in the form of a through ring fitted through the cylindrical tube.

According to an example of the present invention, the plurality of spiral pins may be spaced apart at regular intervals.

According to one embodiment of the invention, the inner tube may be a copper pipe material.

In addition, the appearance may be a steel pipe or copper pipe material, but is not limited to this, if the material is more efficient in performing a function of a durable material or heat exchanger to heat or rapid cooling applied during manufacture, the present invention allows Various applications can be made within the scope.

On the other hand, the manufacturing method of the double-tube heat exchanger according to the present invention for achieving the above technical problem, the step of manufacturing the appearance by processing a cylindrical tube; (b) processing the cylindrical tube to produce an inner tube; (c) attaching the inner tube to the outer tube by inserting the inner tube into the outer tube; And (d) respectively forming inlet and outlet pipes for introducing fluid into the joined double pipe.

According to an example of the present invention, the step (a) may include forming holes for inflow and outflow of the fluid in the cylindrical tube, respectively.

According to an example of the present invention, in the step (b), (b-1) preparing a cylindrical tube with both ends open; (b-2) may comprise the step of machining the spiral fins on the outer wall of the cylindrical tube.

At this time, according to an example of the present invention, in the step (b-2), the spiral fins may be formed in the form of a coil wound along the outer wall of the cylindrical tube.

According to another example of the present invention, in the step (b-2), the helical fins may be formed in the form of a through ring fitted through the cylindrical tube.

According to an example of the present invention, the step (c) comprises: (c-1) expanding the external appearance by applying heat; (c-2) inserting the inner tube into the expanded appearance; (c-3) rapidly cooling the appearance; (c-4) swaging both ends of the exterior to closely contact the inner tube; And (c-5) may comprise the step of welding by welding both ends of the outer tube and the inner tube.

At this time, in the step (c-3), the rapid cooling is characterized in that to adjust to form a space of a predetermined interval between the outer tube and the inner tube.

In the step (c-3), the rapid cooling is characterized in that the close contact between the outer tube and the inner tube is adjusted to form a fine gap.

According to the present invention described above, it is possible to improve the heat exchange performance while simplifying the manufacturing work to improve the quality of the heat exchanger, there is an effect that can reduce the manufacturing cost according to the simplification of the manufacturing work.

In addition, it is possible to increase the productivity by inserting the inner tube into the exterior through a simple manufacturing method, it is possible to prevent the damage of the spiral pin protruding from the inner tube when inserting the inner tube into the exterior to ensure product quality, heat exchange Since the size of the machine can be made smaller than before, there is a wide range of applications.

Hereinafter, a double tube heat exchanger according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is an external view illustrating the entire structure of a double tube heat exchanger according to an exemplary embodiment of the present invention.

In the present embodiment, as shown in FIG. 2, the outer tube 110 and the inner tube 160 are inserted into the outer tube 100, and each of the outer tube 110 and the inner tube 160 includes inlets 120 and 140. The first fluid and the second fluid are introduced through the internal space, and then provide the structure of the double tube heat exchanger 100 discharged to the outside through the outlets 130 and 150.

At this time, the first fluid introduced into the outer tube 110 flows through the inner space between the inner tube 160 and the outer tube 110, and heat exchange is performed or cooled by the second fluid introduced into the inner tube 160.

In this configuration, in order to achieve optimal heat exchange between the first fluid and the second fluid, the frictional loss of the fluid is reduced by reducing the flow obstruction in the space where the first fluid and the second fluid flow, and the first fluid and the second fluid Increasing the interfacial contact area is an important factor.

If the friction loss of the fluid is large, the heat of the fluid is taken away, so that the heat exchange between the fluids is not effective, and if the contact area where the heat exchange is performed by indirect contact between the first fluid and the second fluid is made small, a large area Compared to heat exchange can not be made effectively.

In the present embodiment, with the focus on the above, it is intended to provide various embodiments in which the structure of the inner tube and the exterior are modified.

3 is a cross-sectional view showing a double tube heat exchanger according to a first embodiment of the present invention, Figure 4 is a view showing a heater applied to the double tube heat exchanger according to the first embodiment of the present invention.

Referring first to Figure 3, which shows the internal structure of the double-tube heat exchanger according to the first embodiment of the present invention in detail.

As shown in FIG. 3, the double tube heat exchanger according to the first exemplary embodiment of the present invention includes an exterior 210 having a first inlet 220 and a first outlet 230, and an inner side of the exterior 210 having both sides. It may include an inner tube 260 extending from both ends of the exterior 210 and exposed to the outside.

Both ends of the inner tube 260 may be the second inlet 240 and the second outlet 250 for the inflow and outflow of the fluid.

More specifically, the inner tube 260 may have a cylindrical tube 261 centered on the central axis 261a and a plurality of cylindrical tubes 261 formed around the periphery as shown in FIG. 4. Helical pins 262.

The cylindrical tube 261 may be formed to have a diameter larger than the central axis 261a as shown, but in some cases, the cylindrical tube 261 may be formed to have the same diameter as the central axis 261a. In addition, the diameter of the cylindrical tube 261 may be adjusted according to the capacity and volume of the exterior (210 of FIG. 4) and the inner tube 260.

The plurality of helical fins 262 may be limited in length depending on the length of the appearance in the cylindrical tube 261.

The plurality of spiral fins 262 is a thin coil is wound around the outer wall of the cylindrical tube 261 in the form of a coil. In this regard, the plurality of helical pins 262 may be considered strictly as one pin rather than a plurality.

In addition, the plurality of spiral fins 262 are spaced apart from each other at a predetermined distance (d1) is densely provided, the first fluid flowing into the inner space between the appearance (210 of FIG. 3) and the inner tube 260 for a while It may have a predetermined height h1 so that heat exchange may be made while staying between the exterior (210 of FIG. 3) and the inner tube 260.

Here, the height h1 is a length extending in a direction perpendicular to the central axis 261a of the inner tube 260, the diameter of the cylindrical tube 261 and the size of the outer tube 210, the outer tube 210 and the inner tube 260. ) Can be adjusted according to the degree of space between.

The inner tube 260 configured as described above is also called a heater, and is inserted into the exterior 210 as shown in FIG. 3 so that both ends are in close contact with both ends of the exterior 210. The two parts in close contact may be joined by welding, or the like, to prevent loss of the first fluid flowing between the exterior 210 and the inner tube 260.

In addition, the inner tube 260 is generally provided with a copper pipe, but is not limited thereto. If the inner pipe 260 is a material that is more durable in performing heat or rapid cooling or a function of a heat exchanger, the present invention is not limited thereto. Various applications can be made within the allowable range.

On the other hand, the appearance 210 may be provided with a steel pipe (steel pipe) or copper pipe. Steel pipes have the advantage that the material cost is lower than the copper pipe can significantly lower the manufacturing cost. However, like the inner tube, if the material is more efficient in performing a function of a durable material or heat exchanger to heat or rapid cooling applied during manufacturing, it may be variously applied within the scope of the present invention.

In this embodiment, the exterior 210 is provided with a sufficient internal space so that the body can accommodate the inner tube 260 except for both ends joined to the inner tube 260.

According to one embodiment of the invention, the inner diameter (r1) of the outer appearance 210 is formed larger than the outer diameter (r2) of the inner tube 260 including a plurality of spiral fins 262, the outer appearance 210 and the inner tube (260) The first fluid flowing in between forms a sufficient space for free flow.

In addition, according to another example of the present invention, although not shown in the drawings, the inner diameter r1 of the exterior 210 may be provided to be substantially equal to the outer diameter r2 of the inner tube 260 including the spiral fins 262. In this case, since the exterior 210 and the inner tube 260 are in close contact with each other and there is no internal space between the exterior 210 and the inner tube 260, the first fluid introduced into the exterior 210 is the spiral of the inner tube 260. The spiral flow along the fins 262 allows the first fluid to be evenly exchanged.

Accordingly, the double-pipe heat exchanger according to the first embodiment of the present invention is the first fluid flowing through the first inlet port 220 of the exterior 210, the interior space of the exterior 210, more specifically the exterior 210 It passes through the inner space 212 between the inner tube 260 and is discharged through the first outlet 230, by the second fluid introduced through the second inlet 240 of the inner tube 260 during this process Heat exchange occurs between the first fluid and the second fluid, and as the heat exchange occurs, the second fluid is discharged to the outside through the second outlet 250 of the inner tube 260.

At this time, the area in which the first fluid and the second fluid may be indirectly widened through the plurality of spiral pins 262 formed along the outer side of the inner tube 260, and the exterior 210 and the inner tube 260 may be When there is no inner space 212 in close contact with each other, since the first fluid flows along the spiral fins 262 of the inner tube 260, heat exchange between the first fluid and the second fluid may be performed quickly and effectively.

On the other hand, the first fluid and the second fluid may be a heating material or a heated object, in general, the first fluid flowing into the exterior 210 is the heating material, and the second fluid flowing into the inner tube 260 is the heated material. Can be applied as

Next, a double tube heat exchanger according to a second embodiment of the present invention will be described.

5 is a cross-sectional view showing a double tube heat exchanger according to a second embodiment of the present invention, Figure 6 is a view showing a heater applied to the double tube heat exchanger of the second embodiment of the present invention, Figure 7 is a second embodiment of the present invention It is sectional drawing which shows the vertical cross section of the double tube heat exchanger.

5 to 7, the double tube heat exchanger according to the second embodiment of the present invention, as in the first embodiment, the first inlet 320 and the first outlet 330 is provided with an exterior 310, It may include an inner tube 360 inserted into the exterior 310 and both sides extending from both ends of the exterior 310 to be exposed to the outside.

Both ends of the inner tube 360 are the second inlet 340 and the second oil outlet 350 for the inflow, outflow of the fluid.

Here, components overlapping with the first embodiment of the components constituting the double tube heat exchanger according to the second embodiment of the present invention will be omitted, and only components that do not overlap with the first embodiment will be described.

As shown in FIG. 6, the inner tube 360 according to the second embodiment of the present invention includes a cylindrical tube 361 forming a central axis and a plurality of spiral fins 362 formed around the outer side of the cylindrical tube 361. ).

The cylindrical tube 361 may be adjusted in diameter depending on the size of the exterior 310 and the inner tube 360.

The plurality of spiral pins 362 may be provided in the form of a through ring fitted through the cylindrical tube 361.

In this case, the plurality of spiral fins 362 are spaced apart from each other at a predetermined interval d2 and fixed to the cylindrical tube 361. In addition, the plurality of spiral fins 362 may adjust the size of the diameter (h2) so that the exterior 310 and the inner tube 360 is in close contact with each other.

That is, the diameter h2 of the plurality of spiral fins 362 may be changed depending on the diameter of the cylindrical tube 361 and the inner size of the outer appearance 310, the degree of space between the outer appearance 310 and the inner tube 360, and the like. .

According to this embodiment, the double tube heat exchanger according to the second embodiment has an inner diameter R1 of the exterior 310 of the inner tube 360 including the plurality of spiral fins 362, as shown in FIGS. 6 and 7. By being provided substantially the same as the outer diameter (R2), it is possible to effectively perform the heat exchange of the first fluid flowing into the appearance (310).

Specifically, when the two inner tubes R1 of the outer diameter 310 and the outer diameter R2 of the inner tube 360 are coupled to each other, the outer surface 310 and the inner tube 360 are closely attached to the outer surface 310. And the inner space between the inner tube 360 is narrowed. Then, the first fluid introduced into the outer tube () flows helically along the spiral fins 362 of the inner tube 360, whereby the first fluid rapidly exchanges heat by the second fluid flowing in the inner tube 360. This can be done.

In addition, the flow of the fluid is omitted because it is the same as the double tube heat exchanger according to the first embodiment.

On the other hand, although not shown in the drawings, the inner diameter R1 of the outer surface 310 is formed to be larger than the outer diameter R2 of the inner tube 360 including the plurality of spiral fins 362 between the outer surface 310 and the inner tube 360. It may also form a sufficient space for the first fluid to flow freely.

Hereinafter, a process for manufacturing the double tube heat exchanger according to the first and second embodiments of the present invention will be described with reference to the drawings.

FIG. 8 is a flowchart illustrating a method of manufacturing a double tube heat exchanger according to an exemplary embodiment of the present invention, and FIGS. 9 and 10 are detailed views for explaining an external machining process and an inner tube machining step shown in FIG. 8, respectively. FIG. 11 is a detailed view for explaining the bonding step illustrated in FIG. 8.

First, referring to FIG. 8, in the method of manufacturing a double tube heat exchanger according to an exemplary embodiment of the present invention, an initial stage manufacturing step (S100) and an inner tube manufacturing step (S200) to form an inner tube are respectively formed as an initial step. Perform.

Thereafter, a bonding step (S300) of forming a double tube by bonding the outer tube manufactured in the outer manufacturing step (S100) and the inner tube manufactured in the manufacturing step (S200).

Thereafter, the inlet and outlet pipe forming step (S400) of connecting the inlet and outlet pipes to the outer and inner pipes in the double pipe to manufacture a heat exchanger.

Referring to the above manufacturing step in detail, first, the external manufacturing step (S100) to prepare a cylindrical tube with both sides opened as shown in Figure 9 to form two holes in the direction facing each other (S110, S120) ).

Subsequently, the formed two holes are processed to form inlets for introducing the first fluid and outlets for discharging the first fluid to the outside (S130).

In the appearance manufacturing step (S100) according to an embodiment of the present invention, the cylindrical tube uses a steel pipe or copper pipe material, the size may vary depending on the capacity and volume of the inner tube to be inserted therein. However, it should be larger than the size of the inner tube inserted therein.

Next, referring to FIG. 10, an inner tube manufacturing step (S200) of a double tube heat exchanger according to an exemplary embodiment of the present disclosure may prepare a cylindrical tube having both sides open at first, and may include a plurality of spiral fins outside the cylindrical tube. Processing step (S210, S220).

At this time, the cylindrical tube is formed to have a smaller diameter than the cylindrical tube to form the appearance.

The outer diameter of the tube including the plurality of spiral fins is formed to be substantially equal to the inner diameter of the outer appearance, or smaller than the inner diameter of the outer appearance.

According to the first embodiment of the present invention, the plurality of spiral fins may be formed in a structure in which a thin blade is wound in a coil form along the outer wall of the cylindrical tube.

Alternatively, according to the second embodiment of the present invention, as shown in Figure 6 may be provided in the form of a through ring fitted through the cylindrical tube.

In detail, the plurality of spiral pins can adjust the size of the cylindrical tube according to the diameter of the cylindrical tube, the inner size of the exterior, the amount of space between the exterior and the inner tube, etc. Processing.

A step (S300) of bonding the inner tube and the external appearance described above is as shown in FIG.

First, heat is applied to the exterior manufactured through the exterior manufacturing step S100 to expand the diameter of the exterior (S310).

When the inner tube is forcibly inserted into the outer tube to join the outer tube and the inner tube manufactured in the external manufacturing step (S100) and the inner tube manufacturing step (S200), the spiral pins of the inner tube may be crushed or warped. have. For this reason, the step S310 to prevent the above phenomenon.

When the external appearance is expanded, the internal tube manufactured through the internal tube manufacturing step (S200) is inserted into the external appearance, and the external appearance is rapidly cooled to shrink the expanded external appearance (S320 and S330).

At this time, the shrinkage strength can be performed by adjusting depending on how much space is formed between the outer tube and the inner tube.

For example, a predetermined space may be formed between the outer tube and the inner tube, or the outer tube may be strongly contracted so as to closely contact the inner tube including the spiral pins.

Thereafter, both ends of the exterior are swaging to match both sides of the inner tube (S340).

Then, both ends of the outer tube are axially attached to both outer walls of the inner tube.

Thereafter, by welding between the outer and inner tubes in close contact (S350). Therefore, it is possible to prevent the loss of the first fluid flowing between the outer tube and the inner tube and to discharge the first fluid introduced through the inlet of the outer tube through the outlet.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

1 is an example showing the internal structure of a double tube heat exchanger according to the prior art.

2 is an external view illustrating the entire structure of a double tube heat exchanger according to an exemplary embodiment of the present invention.

3 is a cross-sectional view showing a double tube heat exchanger according to a first embodiment of the present invention.

4 is a view showing a heater applied to the double tube heat exchanger of the first embodiment of the present invention.

5 is a cross-sectional view showing a double tube heat exchanger according to a second embodiment of the present invention.

6 is a view showing a heater applied to the double tube heat exchanger of the second embodiment of the present invention.

7 is a cross-sectional view showing a vertical cross-sectional view of a double tube heat exchanger according to a second embodiment of the present invention.

8 is a flowchart illustrating a method of manufacturing a double tube heat exchanger according to an embodiment of the present invention.

FIG. 9 is a detailed view for explaining the appearance machining step illustrated in FIG. 8.

10 is a detailed view for explaining the inner tube processing step shown in FIG.

FIG. 11 is a detailed view for explaining the bonding step illustrated in FIG. 8.

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

100: double tube heat exchanger 110, 210, 310: appearance

120, 220, 320: first inlet 130, 230, 330: first outlet

140, 240, 340: second inlet 150, 250, 350: second outlet

160, 260, 360: Interior 212: Interior space

261a: central axis 261, 361: cylindrical tube

262, 362: plural spiral pins

Claims (15)

An exterior having a flow space of a first fluid therein and having a first inlet and a first outlet through which the first fluid is introduced and discharged on one side and the other side; And The inner tube which is embedded in the exterior and the inside is formed with a flow space of the second fluid, The inner tube, A plurality of helical fins formed around a cylindrical tube outer wall; A first inlet formed at one end of the cylindrical tube to receive the second fluid; And A second outlet port through which the second fluid flows to the other end of the first inlet port; Double tube heat exchanger comprising a. The method of claim 1, An outer diameter of the inner tube including the spiral fins is the same as the inner diameter of the outer appearance, or less than the inner diameter of the outer tube heat exchanger. The method of claim 1, The plurality of spiral pins, Double tube heat exchanger, characterized in that provided in the form of a coil wound along the outer wall of the cylindrical tube. The method of claim 1, The plurality of spiral pins Double tube heat exchanger, characterized in that provided in the form of a through-ring fitted through the cylindrical tube. The method according to claim 3 or 4, Double tube heat exchanger, characterized in that spaced apart at regular intervals between the plurality of spiral fins. The method of claim 1, The inner tube is a double pipe heat exchanger, characterized in that the copper pipe. The method of claim 1, The appearance is a double pipe heat exchanger, characterized in that the steel pipe or copper pipe. (a) processing the cylindrical tube to produce an appearance; (b) processing the cylindrical tube to produce an inner tube; (c) attaching the inner tube to the outer tube by inserting the inner tube into the outer tube; And (d) respectively forming inlet and outlet pipes for introducing a fluid into the joined double pipe;  Method of manufacturing a double tube heat exchanger comprising a. The method of claim 8, In the step (a), And forming holes for inflow and outflow of fluid in the cylindrical tube, respectively. The method of claim 8, In the step (b), (b-1) preparing a cylindrical tube with both ends open; (b-2) machining the spiral fins on the cylindrical tube outer wall; Method of manufacturing a double tube heat exchanger comprising a. The method of claim 10, In the step (b-2), The spiral fins are formed in the form of a coil wound along the outer wall of the cylindrical tube heat exchanger manufacturing method. The method of claim 10, In the step (b-2), The spiral fins are formed in the form of a through-ring fitted through the cylindrical tube. The method of claim 8, Step (c) is, (c-1) inflation by applying heat to the exterior; (c-2) inserting the inner tube into the expanded appearance; (c-3) rapidly cooling the appearance; (c-4) swaging both ends of the exterior to closely contact the inner tube; And (c-5) welding both ends of the exterior and the inner tube to each other; Method of manufacturing a double tube heat exchanger comprising a. The method of claim 13, In the step (c-3), The rapid cooling is a manufacturing method of a double-tube heat exchanger, characterized in that to adjust to form a space of a predetermined interval between the outer tube and the inner tube. The method of claim 13, In the step (c-3), The rapid cooling is a manufacturing method of a double-tube heat exchanger, characterized in that the fine contact between the outer tube and the inner tube is adjusted to form a gap.
KR1020070098994A 2007-10-02 2007-10-02 Dualpipe type heat exchanger and method for menufacturing the same KR20090033926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070098994A KR20090033926A (en) 2007-10-02 2007-10-02 Dualpipe type heat exchanger and method for menufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070098994A KR20090033926A (en) 2007-10-02 2007-10-02 Dualpipe type heat exchanger and method for menufacturing the same

Publications (1)

Publication Number Publication Date
KR20090033926A true KR20090033926A (en) 2009-04-07

Family

ID=40759985

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070098994A KR20090033926A (en) 2007-10-02 2007-10-02 Dualpipe type heat exchanger and method for menufacturing the same

Country Status (1)

Country Link
KR (1) KR20090033926A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957860B1 (en) * 2009-07-02 2010-05-14 (주)대호냉각기 Heat exchanger for air conditioner
WO2015043548A1 (en) * 2013-09-30 2015-04-02 Hong Kong Modern Technology Limited Fluid heat exchanger and energy recycling device
CN104634813A (en) * 2015-01-27 2015-05-20 中国科学院合肥物质科学研究院 Heat transfer coefficient adjustable heat-exchange device
CN108981420A (en) * 2018-05-07 2018-12-11 上海海事大学 A kind of bilayer sleeve heat-exchanger rig suitable for hazardous fluids medium
KR20210016961A (en) * 2019-08-06 2021-02-17 나민수 Trommel screen
US20210278137A1 (en) * 2020-03-03 2021-09-09 Daikin Applied Americas, Inc. System and Method for Manufacturing and Operating a Coaxial Tube Heat Exchanger

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957860B1 (en) * 2009-07-02 2010-05-14 (주)대호냉각기 Heat exchanger for air conditioner
WO2015043548A1 (en) * 2013-09-30 2015-04-02 Hong Kong Modern Technology Limited Fluid heat exchanger and energy recycling device
GB2535072A (en) * 2013-09-30 2016-08-10 Hong Kong Modern Tech Ltd Fluid heat exchanger and energy recycling device
GB2535072B (en) * 2013-09-30 2020-02-05 Hong Kong Modern Tech Limited Fluid heat exchanger and energy recycling device
US11209218B2 (en) 2013-09-30 2021-12-28 Hong Kong Modern Technology Limited Fluid heat exchanger and energy recycling device
CN104634813A (en) * 2015-01-27 2015-05-20 中国科学院合肥物质科学研究院 Heat transfer coefficient adjustable heat-exchange device
CN104634813B (en) * 2015-01-27 2017-03-29 中国科学院合肥物质科学研究院 A kind of adjustable heat-exchanger rig of heat transfer coefficient
CN108981420A (en) * 2018-05-07 2018-12-11 上海海事大学 A kind of bilayer sleeve heat-exchanger rig suitable for hazardous fluids medium
KR20210016961A (en) * 2019-08-06 2021-02-17 나민수 Trommel screen
US20210278137A1 (en) * 2020-03-03 2021-09-09 Daikin Applied Americas, Inc. System and Method for Manufacturing and Operating a Coaxial Tube Heat Exchanger

Similar Documents

Publication Publication Date Title
JP3131774B2 (en) Multi-flow condenser for vehicle air conditioner
KR20090033926A (en) Dualpipe type heat exchanger and method for menufacturing the same
JP4987685B2 (en) Double tube heat exchanger, method for manufacturing the same, and heat pump system including the same
WO2014091558A1 (en) Double-pipe heat exchanger and refrigeration cycle device
CN107014117B (en) Heat exchanger
JP4454779B2 (en) Plate heat exchanger
US20140166252A1 (en) Heat exchanger and method
KR102087678B1 (en) Device for heat transfer
JP2018529922A (en) Heat exchange tube for heat exchanger, heat exchanger, and method of assembling the same
JP2007010298A (en) Heat exchanger with receiver tank
CN217383869U (en) Micro-channel heat exchanger
JP2018124034A (en) Tube for heat exchanger
JP2004340455A (en) Heat exchanger
JP2015034660A (en) Heat exchanger
JP7210744B2 (en) Heat exchanger and refrigeration cycle equipment
KR20050104072A (en) Heat exchanger
JP2001059689A (en) Tube for heat exchanger
JP5656786B2 (en) Manufacturing method of different diameter twisted tube heat exchanger
JP5851846B2 (en) Heat exchanger and manufacturing method thereof
JP6336152B2 (en) Manufacturing method of double tube heat exchanger
JP2005188849A (en) Heat exchanger
JP5533328B2 (en) Heat exchanger
JP2017003107A (en) Slide type change-over valve and refrigeration cycle system
KR100740698B1 (en) Header pipe for heat exchanger
JPH11118370A (en) Double tube type heat exchanger

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E601 Decision to refuse application