KR100990508B1 - manufacturing method of heat exchanger - Google Patents

Abstract

The present invention relates to a method of manufacturing a heat exchanger in which productivity can be improved. The present invention is a step of bending both ends of the plate-like flat plate to the same length in one direction, each of which is greater than 90 ° and bent at an angle of less than 100 ° to form a gap maintaining portion; Before the gap holding part is formed, both ends of the plate-shaped flat plate have the same length in one direction, and the angle between the plate and the plate is greater than 90 ° and bent at an angle of 100 ° or less to form the supporting part, and the gap holding part is formed. Thereafter, any one of the steps of forming the support part by bending the angle of the end portion of the gap holding part with the gap holding part is greater than 90 ° and 100 ° or less; Bending both sides of the plate so that the angle maintaining portion is formed to form one surface portion; Both sides of the plate are bent to include the gap retaining portion and the one side portion so that the side portions are formed at the same time, and each gap retaining portion bent at an angle greater than 90 ° and less than 100 ° is firmly adhered to each other by elasticity. The support portion bent at an angle of greater than 90 ° and less than 100 ° to be in close contact with the other surface by elastic force so that the gap maintaining portion is positioned at the center of the other surface without the bonding process. Shaping the tube; And by stacking the tube and the cooling fins sequentially, by combining the front frame and the rear frame so that both sides of the tube is inserted into the inlet and outlet, respectively, by the cooling fin provided between one side and the other side of each tube between each tube. It provides a method of manufacturing a heat exchanger comprising the step of fixing the tube and the cooling fins while being pressurized and the elastic force is applied as the pressurized spacers are pressed to achieve a higher adhesion.

Heat exchanger, tube, cooling fin

Description

Manufacturing method of heat exchanger

The present invention relates to a method of manufacturing a heat exchanger, and more particularly to a method of manufacturing a heat exchanger that can be improved in productivity.

In general, a heat exchanger refers to a device for performing heat exchange by directly or indirectly contacting two fluids having different temperatures, and the configuration of such a heat exchanger includes a tube through which a flow path is formed and a fluid therebetween, between each tube. It comprises a plurality of cooling fins provided.

A brief description of the general structure of the tube in the configuration of such a heat exchanger is as follows.

First, the tube is appropriately bent to a molding machine such as a forming machine (former) of a plate made of a material such as aluminum, it is molded to form a flow path therein by joining the both ends of the bending.

In this case, as a general method for joining the bent both ends, the soluble material is applied to the surface of the plate to be used in the manufacture of the tube in advance, the banded both ends are bonded to each other by a brazing furnace (brazing furnace) in the state of heating by heating the There is a brazing bonding in which the soluble material is melted and bonded, and a bonding method through bonding with an adhesive and seaming.

However, such a brazing, adhesive bonding and seaming joint may not be a good joint state of the joint portion, there is a problem that the fluid or condensate generated during the heat exchange process, such as leaking through the poor bonding state.

In addition, a process of applying a soluble material to a plate and forming a brazing joint after transferring to a blazing, applying a adhesive to the joint and fixing the joint, and simulating the joint There is a problem in that productivity and economics are deteriorated as a result of the following processes.

In general, as the tube is band-formed by forming in a state where the thickness of the plate is thin, it is difficult to maintain a constant shape of the formed tube, which is moved through the tube when the tube is installed in a heat exchanger. There may be a problem that may cause a increase in the flow resistance of the fluid may cause a decrease in the efficiency of the heat exchanger.

In addition, in order to install a tube in a heat exchanger, a complicated jig operation must be added, thereby increasing the defect occurrence rate between manufacturing processes and reducing the work efficiency.

On the other hand, the method of forming the tube by the drawing process is also applied, but the tube formed by the forming method by the drawing process has to increase the thickness of the material so as not to break the material in the forming drawing process, this is the tube As well as reducing the cooling efficiency of the, the weight of the produced tube is increased, there was a problem that also increases the weight of the heat exchanger is installed.

In order to solve the above problems, the present invention is to provide a method of manufacturing a heat exchanger that can be improved in productivity.

In order to achieve the above technical problem, the present invention is a step of bending both ends of the plate-like flat plate in the same length in each direction, the bending is formed at an angle of greater than 90 ° and less than 100 ° to form a gap maintaining portion; Before the gap holding portion is formed, both ends of the plate-shaped flat plate have the same length in one direction, and the angle formed with the flat plate is bent at an angle of greater than 90 ° and less than 100 ° to form a supporting portion and the gap maintaining. After the forming step, any one of the step of forming the support is formed by the end of the gap holding portion is formed in the angle between the gap holding portion is greater than 90 ° and bent at an angle of less than 100 °; Bending both sides of the plate to form one surface part such that the angle maintaining part is included; Both sides of the plate are bent so that the gap holding part and the one surface part are formed so that the side parts are formed at the same time, and the gap holding parts which are bent at an angle of greater than 90 ° and less than 100 ° are firmly adhered to each other by elasticity. The support part bent at an angle of greater than 90 ° and less than 100 ° so that the bottom surface of each support part is in close contact with the other surface part by elastic force so that the gap maintaining part is formed without the adhesion process. Forming a tube supported to be positioned at the center of the other surface portion; And sequentially stacking the tube and the cooling fins, and combining the front frame and the rear frame such that both sides of the tube are inserted into the inlet and the outlet, respectively, between the one side and the other side of the respective tubes. Providing a method of manufacturing a heat exchanger comprising the step of fixing the tube and the cooling fins while being pressurized by the cooling fins provided, while the gap maintaining portions are in close contact with each other so that a high elasticity is applied. do.

delete

delete

delete

delete

Referring to the effects of the manufacturing method of the heat exchanger according to the present invention.

First, since the interval maintaining portion is formed integrally with the tube along the longitudinal direction of the tube at the central portion of the tube to support the upper and lower surfaces of the tube, the cross-sectional shape with respect to the longitudinal direction of the tube can be kept constant. Quality can be improved.

Second, the support is formed at the end of the gap holding portion formed in the center portion of the tube to support the gap holding portion, thereby preventing the gap holding portion from being separated or skewed from the center position of the tube.

Third, the tube can be molded by forming only without a separate bonding process such as brazing, adhesives and seaming at the connection portion can simplify the manufacturing process, thereby improving productivity.

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

1 is a perspective view schematically showing a heat exchanger according to an embodiment of the present invention, Figure 2 is a perspective view schematically showing a tube and a cooling fin of the heat exchanger according to an embodiment of the present invention.

As shown in Figure 1 and 2, the heat exchanger is preferably made of a tube 10, cooling fins 20, the front frame 30 and the rear frame 40. Here, it is preferable that the plurality of tubes 10 having the flow path 19 formed therein are spaced apart at predetermined intervals, and the cooling fins 20 are provided between the tubes 10. In addition, the front frame 30 and the rear frame 40 are respectively coupled to both sides of each of the tubes 10 to fix the tube 10 and the cooling fins 20. At this time, the center portion of the tube 10 is formed integrally with the tube 10, the gap maintaining portion 16 and the support portion 17 is formed to support the central portion of the tube 10, the shape of the tube 10 This can be kept constant.

In detail, the tube 10 is preferably formed by bending the plate-like flat plate in a duct shape, including one surface portion 12, a side portion 13, the other surface portion 14, and a spacing portion 16. Is preferred.

Here, the one surface portion 12 and the other surface portion 14 is used to prevent the upper surface portion and the lower surface portion of the tube 10 from being specifically limited, and the one surface portion 12 means an upper surface portion. In this case, the other surface portion 14 means a lower surface portion, and when the one surface portion 12 means a lower surface portion, the other surface portion 14 means an upper surface portion.

Hereinafter, for convenience, the one surface portion 12 is described as the upper surface portion 12, and the other surface portion 14 is described as the lower surface portion 14.

The side portions 13 connected to both sides of the lower surface portion 14 forming the bottom surface have a height, and extend from each side portion 13 so as to face each other with the same length in parallel with the lower surface portion 14. The upper surface portion 12 is preferably formed in contact with each other.

The gap maintaining portion 16 is formed by bending the end portions of the upper surface portions 12 contacted at the central portion toward the lower surface portion 14, and the banded portions are in close contact with each other and are in close contact with each other. Is preferably formed to be in contact with the lower surface portion 14 perpendicularly.

Through this, the interval maintaining unit 16 may maintain the interval between the upper surface portion 12 and the lower surface portion 14 is constant.

In addition, the gap holding portion 16 is the inner portion of the lower surface portion 14 or the upper surface portion 12 due to the thickness of the plate used for forming the tube 10 is thin (for example, 0.3mm). It is possible to prevent the deformation, such as to be bent to the shape of the tube 10 can be shaped.

Further, as the thickness of the plate used for forming the tube 10 becomes thinner, the tube 10 can be reduced in weight, so that the heat exchanger in which the tube 10 is installed can be made lighter in weight. have.

Here, of course, the spacing maintaining portion 16 is formed to have a length corresponding to the length of the side portion (13).

Accordingly, the inner side of the tube 10 is formed with an open channel 19 on both sides, through which the fluid inside (for example, high temperature wet air generated after the drying process) is moved. This is preferred.

In addition, each of the end portions of the gap maintaining part 16 extends toward the side part 13 opposite to the gap holding part 16, and a bottom surface of the extended part is in close contact with the bottom surface part 14. Preferably, the support 17 is further formed.

Through this, the support part 17 may support the lower end of the gap holding part 16 not to be moved by frictional force due to the close contact with the lower surface part 14, and the end of the gap holding part 16 is It is possible to prevent the shape of the gap holding portion 16 in the longitudinal direction of the tube 10 from being bent or deformed from the central portion of the lower surface portion 14 to bend and deform.

Here, the length of the support 17 is not limited to any particular length, but to prevent unnecessary waste of the material, the gap holding portion 16 due to the friction between the support 17 and the lower surface portion 14 The length is sufficient to prevent the movement of.

On the other hand, a plurality of tubes 10 may be installed to be stacked to be spaced apart from each other by a predetermined interval, the cooling fin 20 is provided in the spaced space between each tube 10.

The cooling fin 20 may have a cross-sectional shape in one direction such as a pulse shape, and in this case, a plurality of cooling flow passages 22 having a pulse-shaped cross section may be formed, and the cooling flow passage 22 may be formed. Through this, another fluid (eg, external dry air) can move.

In addition, it is preferable that the front and rear frames 30 and 40 are coupled to both sides of the tube 10, respectively, through which the tube 10 and the cooling fins 20 can be tightly fixed. .

In detail, the front frame 30 is coupled to one side of the tube 10, the rear frame 40 is preferably coupled to the other side, in this case, the front frame 30 and the rear frame 40 in the tube Preferably, the inlet part 32 and the outlet part (not shown) corresponding to the shapes of both sides of the 10 are formed through.

Preferably, the inlet part 32 and the outlet part are formed to correspond to the stacking intervals of the respective tubes 10 and the number of stacked parts, and through this, each of the tubes provided with the cooling fins 20 therebetween ( Both ends of 10 may be tightly coupled by being inserted into each of the inlets 32 and the outlets.

In addition, in the process of inserting both ends of the tube 10 into the inlet part 32 and the discharge part, the gap maintaining part 16 is the upper surface part 12 and the lower surface part 14 of the tube 10. ) So that both end shapes of the tube 10 can be kept constant without being deformed.

In addition, the upper and lower end portions 12 and 14 of the tube 10 are pressurized by the respective cooling fins 20 while both ends of the tube 10 are inserted into the inlet portion 32 and the discharge portion, respectively. When the gap holding unit 16 maintains a constant gap between the upper and lower surfaces 12 and 14, the tube 10 and the cooling fins 20 may be closely attached to each other.

In addition, such an effect generated by the gap holding unit 16 described above may be more effectively achieved by the support unit 17 supporting the gap holding unit 16.

On the other hand, the wet air generated through the drying process in various environments not limited to any particular case is guided to the flow path 19 formed in the tube 10 through the inlet portion 32 is discharged through the discharge portion Will be.

At the same time, the dry air introduced from the outside moves through the cooling passage 22 formed in the cooling fin 20.

Accordingly, the wet air and the dry air introduced from the outside are not mixed with each other but cross-move and indirect heat exchange is performed.

Here, the wet air introduced into the duct 10 after the drying operation is a high temperature, and the dry air introduced into the cooling fin 20 is relatively low temperature, so that the wet air is condensed by heat exchange with the dry air to remove moisture. After being converted into dry air it can be discharged.

3A to 3E are exemplary views sequentially illustrating a method of manufacturing a tube of a heat exchanger according to an embodiment of the present invention.

As shown in Figures 3a to 3e, the manufacturing method of the tube 10 is as follows.

First, it is preferable that both ends of the plate-shaped flat plate P are bent to have the same length in one direction, so that the gap maintaining part 16 is formed.

Here, the plate P may be made of various materials, but preferably made of aluminum.

In addition, it is preferable that both sides of the flat plate P are bent so that the gap maintaining part 16 is formed so that the upper surface part 12 is formed.

In addition, it is preferable that both sides of the flat plate P are bent so that the gap maintaining part 16 and the upper surface part 12 are included, and the side parts 13 are formed, respectively.

In this case, as the side portions 13 are formed through bending, the respective gap maintaining portions 16 are preferably in close contact with each other, and the gaps are maintained at the point of close contact between the gap maintaining portions 16. An end portion of the portion 16 may be brought into close contact with the lower surface portion 14.

In addition, cooling fins (see 20 in FIG. 1) and the tube 10 are sequentially stacked on the outer side of the tube 10 manufactured as described above, and the front and rear frames are respectively formed on both sides of the tube 10. 1, 30, 40) is coupled to the heat exchanger can be manufactured by fixing the tube 10 and the cooling fin 20.

On the other hand, both ends of the flat plate (P) is preferably bent in the same length in one side direction before the gap retaining portion 16 is bent to form the support portion 17 is formed first.

Of course, it is also possible that the support portion 17 is formed by bending the end portion of the gap maintaining portion 16 after the gap holding portion 16 is formed.

In this case, the gap maintaining portion 16, which is already bent, should be bent as much as the length of the length of the support 17 is added.

As a result, each of the gap maintaining portions 16 is in close contact with each other as the side portions 13 are formed through bending, and the gap maintaining portions (the adhesion between the gap maintaining portions 16 are completed). When the end portion of the 16 is in close contact with the lower surface portion 14, the respective support portions 17 may also be in close contact with the lower surface portion 14.

On the other hand, the support 17 may be bent to form an angle of 90 ° with the spacing holding portion 16, more preferably may be bent at an angle larger than θ ₁ than 90 °.

In addition, the gap maintaining part 16 may also be bent to form an angle of 90 ° with the side part 13, but more preferably, may be bent at an angle greater than θ ₂ by 90 °.

Through this, when the tube 10 is coupled to the front and rear frame, both ends of the tube 10 are pressurized while being inserted into the inlet (see 32 in FIG. 1) and the outlet, and the tube 10 As the upper and lower surfaces of the) are pressed by the cooling fins provided between the respective tubes 10, the gap holding portions 16, which are bent by θ ₁ , are brought into close contact with each other, thereby providing a high elasticity. This can be done.

And, due to the high adhesion between the gap holding portion 16 can be effectively prevented deformation such as bending of the gap holding portion 16, as well as the condensate generated in the cooling fins the gap holding portion 16 It can also be prevented from flowing into the tube 10 through the between.

Therefore, a separate bonding process, such as brazing, may be omitted in the gap maintaining unit 16, so that the manufacturing process may be further simplified and productivity may be improved.

In addition, since the support part 17 is further bent by θ ₂ , elasticity can be applied when the support part 17 is in close contact with the lower surface part 14, so that the higher contact with the lower surface part 14 is achieved. Because high friction force can be generated, it is possible to more effectively prevent the movement of the spacer 16.

Here, the θ ₁ and so as to prevent deterioration of the assemblability when assembling the front and rear frame and the tube 10. θ ₂ of The range is preferably made of 10 ° or less, but is not necessarily limited to this, it is preferable to be appropriately applied according to the conditions, such as the material and thickness of the material to be formed into the tube (10).

On the other hand, the heat exchanger having such a configuration can be applied to all of the various heat exchangers that can be used heat exchange, including a clothes dryer for drying the clothes.

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 perspective view schematically showing a heat exchanger according to an embodiment of the present invention.

Figure 2 is a perspective view schematically showing a tube and a cooling fin of the heat exchanger according to an embodiment of the present invention.

3a to 3e are exemplary views sequentially showing a method of manufacturing a tube of a heat exchanger according to an embodiment of the present invention.

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

10: tube 12: one side

13: side 14: other side

16: spacing 17: support

20: cooling fin 30: front frame

32: inlet 40: rear frame

Claims (5)

delete delete delete Both ends of the plate-shaped flat plate is bent to have the same length in each direction, but is bent at an angle of greater than 90 ° and less than 100 ° to form a gap maintaining portion; Before the gap holding portion is formed, both ends of the plate-shaped flat plate have the same length in one direction, and the angle formed with the flat plate is bent at an angle of greater than 90 ° and less than 100 ° to form a supporting portion and the gap maintaining. After the forming step, any one of the step of forming the support is formed by the end of the gap holding portion is formed in the angle between the gap holding portion is greater than 90 ° and bent at an angle of less than 100 °; Bending both sides of the plate to form one surface part such that the angle maintaining part is included; Both sides of the plate are bent so that the gap holding part and the one surface part are formed so that the side parts are formed at the same time, and the gap holding parts which are bent at an angle of greater than 90 ° and less than 100 ° are firmly adhered to each other by elasticity. The support part bent at an angle of greater than 90 ° and less than 100 ° so that the bottom surface of each support part is in close contact with the other surface part by elastic force so that the gap maintaining part is formed without the adhesion process. Forming a tube supported to be positioned at the center of the other surface portion; And The tube and the cooling fins are sequentially stacked, and the front and rear frames are coupled to each other so that both sides of the tube are inserted into the inlet and the outlet, respectively, between the one side and the other side of each tube, between the tubes. As the pressurized by the cooling fins which are in close contact with each other while maintaining the elastic force is applied to each other while maintaining a high adhesion to the tube and the cooling fins comprising the step of fixing the cooling fins. delete

Images