Abstract:
The present invention relates to a heat exchanger pipe, which enables heat exchange between fluid flowing along the interior of the pipe and fluid existing exterior of the pipe, and the manufacturing method therefor, in particular, a heat exchanger pipe and manufacturing method therefor such that enhances flow of fluid within the pipe&#39;s interior, increases heat exchange rate by making more contact, enhancing adherence property and sealing property between the outer pipe and the insertion in the interior of said outer pipe in the manufacturing process, and at the same time is easy to manufacture.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a heat exchanger pipe, which enables heat exchange between fluid flowing along the interior of the pipe and fluid existing exterior of the pipe, and the manufacturing method therefor, in particular, a heat exchanger pipe and manufacturing method therefor such that enhances flow of fluid within the pipe&#39;s interior, increases heat exchange rate by making more contact, enhancing adherence property and sealing property between the outer pipe and the insertion in the interior of said outer pipe in the manufacturing process, and at the same time is easy to manufacture. 
         [0003]    2. Description of the Related Art 
         [0004]    Heat exchanger pipes, used in air conditioning and heating systems such as boilers, heat pumps, and air conditioners, are used to provide not only hot water or heated water, but also heat and cold by enabling heat exchange between fluid that flowing along the interior of the pipe and fluid existing exterior of the pipe. 
         [0005]    Fluid flowing along the interior of the pipe is typically a gas such as hot combustion gas, and the fluid existing exterior of the pipe being a liquid such as direct water, the hot combustion gas typically provides hot water or heated water by exchanging heat with the direct water while flowing within the heat exchanger pipe, but there is no special limitation on each of the fluids, either liquid or gas, in the interior and exterior of the pipe. 
         [0006]    Meanwhile, as shown in FIG. 1 Korean Registered Patent No. 10-217265 discloses a heat exchanger tube for heating boilers, including a cylindrical exterior tube  1  and a pair of half part shells  3  and  4  installed within said exterior tube  1 , thus in contact with the exterior tube  1 . 
         [0007]    Also, the surface area is expanded by arranging multiple ribs  5  within the half part shells  3  and  4  like a comb, and the longitudinal contact edges of the half part shells  3  and  4  each form interlocking groove type recess  7  and rib type tongue  8  in attempt to improve sealing. 
         [0008]    However, a heat exchanger tube as described above (i.e., heat exchanger pipe) is problematic in that their lengths are each adjusted so that the terminal of each of the ribs  5  are aligned(in line) and the flow of the interior fluid is minor, thus the heat contact amount between the fluid, the source of heat, and ribs  5  is insufficient. 
         [0009]    Also, the exterior tube  1  and half part shells  3  and  4  are assembled through a adhering method of applying pressure evenly to the entire outer surface of said exterior tube  1 , and the actual applied force Fr herein is applied orthogonal to each outer surface in the exterior tube  1 , while the force Fn needed to forcefully adhere the groove type recess  7  and rib type tongue  8  is not identical in direction to said actual applied force, thus it is problematic that a gap is formed between the groove type recess  7  and rib type tongue  8 . 
       SUMMARY OF THE INVENTION 
       [0010]    In the present invention proposed in order to resolve the problems stated above are, in accomplishing heat exchange between fluid flowing along the interior of the pipe and fluid existing exterior of the pipe, a heat exchanger pipe and manufacturing method therefor such that enhances flow of fluid within the pipe&#39;s interior, increases heat exchange rate by making more contact, enhancing adherence property and sealing property between the outer pipe and the insertion in the interior of said outer pipe in the manufacturing process, and at the same time is easy to manufacture. 
         [0011]    In order to achieve this, the heat exchanger pipe according to the present invention consists of a cylindrical outer pipe, a primary half part shell and secondary half part shell such that the outer surface is in contact with the inner surface of said outer pipe, if each comprises of a half-cylindrical form, and they are combined facing each other within the interior of said outer pipe, and the primary rib and secondary rib arranged orthogonal to the hypothetical boundary surface partitioning said primary half part shell and secondary half part shell, extending from each inner surface of said primary half part shell and secondary half part shell towards the interior space, but with a multiple of said primary rib, the length of said primary ribs are adjusted such that an ‘S’ shape is formulated when the terminals of said primary ribs are connected by an imaginary line, a multiple of said secondary rib, the length of said secondary ribs are adjusted such that an ‘S’ shape is formulated when the terminals of said secondary ribs are connected by an imaginary line, and the terminals of said primary rib and secondary rib are separated. 
         [0012]    In this case, preferably a primary half part insertion consisting of said primary half part shell and primary rib and a secondary half part insertion consisting of said secondary half part shell and secondary rib are identically shaped through pressing out, but the cross section of said primary half part insertion and secondary half part insertion are bilaterally symmetrical. 
         [0013]    Also, preferably terminals of both sides of said primary half part shell and terminals of both sides of secondary half part shell are each shaped in flat form, but a certain length from the terminal of said flat primary half part shell includes a primary bend bent towards said outer pipe, a certain length from the terminal of said flat secondary half part shell includes a secondary bend bent towards said outer pipe, the primary half part shell and secondary half part shell are inserted facing each other in the interior of said outer pipe and accordingly if pressure is applied on said outer pipe, said primary bend and secondary bend are straightened, and the flat terminal of said primary half part shell and the flat terminal of said secondary half part shell are adhered and joined. 
         [0014]    Also, preferably multiple primary bumps are formed on the cross section of said primary half part shell, multiple secondary bumps are formed on the cross section of said secondary half part shell, thus pressure is applied on said outer pipe and when assembled said primary bumps and secondary bumps adhere as they interlock. 
         [0015]    Also, preferably heat exchange grooves are formed on the surface of said outer pipe to expand surface area. 
         [0016]    Also, preferably in the portions of both of the lengthwise terminals of said primary half part shell and secondary half part shell of said outer pipe, trap tongues, each projected towards each interior, are formed to prevent said primary half part shell and secondary half part shell from breaking away from said outer pipe. 
         [0017]    Meanwhile, the heat exchanger pipe manufacturing method according to the present invention consists steps of preparing an insertion such that said primary half part shell and secondary half part shell are placed erect on top of a upper portion table identical to the diameter of said primary half part shell and secondary half part shell combined facing each other, preparing an outer pipe that enables placing said outer pipe erect on top of a lower portion table, such that supports the lower part of said upper portion table but has a larger diameter than said upper portion table, such that said primary half part shell and secondary half part shell are placed within the interior of said outer pipe, preparing to apply pressure to place the dies mold, such that is equipped with a taper component in the interior of the lower side and a pressure applying component in the interior of the upper side of said taper component, the diameter of the lower part of said taper component identical to the external diameter of said outer pipe, the diameter of said pressure applying component identical to the external diameter of said primary half part shell and secondary half part shell combined, on the upper side of said outer pipe, in a condition such that said dies mold is descended until the outer pipe is inserted in the interior of said dies mold, pushing down said dies mold to apply pressure on the outer pipe with said pressure applying component so that the inner surface of said outer pipe is adhered to the outer surface of said primary half part shell and secondary half part shell. 
         [0018]    According to the heat exchanger pipe of the present invention described above, since the length of each rib is adjusted such that the terminals of the ribs equipped in each the primary half part shell and secondary half part shell to form an ‘S’ shape, the flow of fluid flowing within the interior of the pipe is further enhanced and more contact is made to increase heat exchange rate. 
         [0019]    Also, according to the heat exchanger pipe manufacturing method in the present invention, by having a bend that bends identical in direction with the actual applied force when pressure is applied to the outer pipe, adherence property and sealing property between the outer pipe and the insertion in the interior of said outer pipe in the manufacturing process are enhanced, and at the same time manufacturing is made easy since adhesion of the outer pipe and insertion is achieved simply by inserting and pushing the dies mold. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0020]      FIG. 1  is a cross-sectional diagram displaying a heat exchanger pipe(heat exchange tube) according to prior art; 
           [0021]      FIG. 2  is a perspective view displaying a heat exchanger pipe according to the first embodiment of the present invention; 
           [0022]      FIG. 3  is a cross-sectional diagram displaying a heat exchanger pipe according to the first embodiment of the present invention; 
           [0023]      FIG. 4  is a cross-sectional diagram displaying a heat exchanger pipe according to the second embodiment of the present invention; 
           [0024]      FIG. 5  is a partial cross-sectional diagram displaying a heat exchanger pipe according to the third embodiment of the present invention; 
           [0025]      FIG. 6  is a partial cross-sectional diagram displaying a heat exchanger pipe according to the fourth embodiment of the present invention; 
           [0026]      FIG. 7  is a perspective view displaying a heat exchanger pipe according to the fifth embodiment of the present invention; 
           [0027]      FIG. 8  is a perspective view displaying a heat exchanger pipe according to the sixth embodiment of the present invention; 
           [0028]      FIG. 9  is a diagram showing the heat exchanger pipe manufacturing method according to the embodiments of the present invention; 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0029]    Hereinafter, with reference to the attached drawings, preferable embodiments of the trap apparatus for heat exchanger pipe and manufacturing method therefor will be described in detail. 
         [0030]    First, the heat exchanger pipe  20  according to the first embodiment of the present invention, as in the perspective view of  FIG. 2  and the cross-sectional diagram of  FIG. 3 , includes a cylinder shaped outer pipe  21 , and a primary half part insertion  22 ,  23  and secondary half part insertion  24 ,  25  inserted in the interior or said outer pipe  21 . For example the outer pipe  21  is made of metal such as steel, and the primary half part insertion  22 ,  23  and secondary half part insertion  24 ,  25  are made of aluminum. 
         [0031]    In this case, the primary half part insertion  22 ,  23  consists of a primary half part shell  22  in semicylinder form, the cylinder cut along its length, and multiple primary ribs  23  on said primary half part shell  22 . Similarly, the secondary half part insertion  24 ,  25  consists of a secondary half part shell  24  and multiple secondary ribs  25 . 
         [0032]    Also, the terminal F of the primary half part shell  22  and the terminal F′ of the secondary half part shell  24  each consist of flat sides, so that when the terminals of the primary half part shell  22  and secondary half part shell  24  which are arranged to face each other are tightly assembled through adhesion, leakage of the fluid flowing along the interior of the primary half part shell  22  and secondary half part shell  24  part shell  22  through the gap between the secondary half part shell  24  is prevented. 
         [0033]    Also, the primary ribs  23 , installed at regular intervals, extend from the inner surface of the primary half part shell  22  towards the interior space, and the secondary ribs  25 , installed at regular intervals, extend from the inner surface of the secondary half part shell  24  towards the interior space, both the primary ribs  23  and secondary ribs  25  arranged orthogonal to the hypothetical boundary surface partitioning said primary half part shell  22  and secondary half part shell  24 . 
         [0034]    In particular, in the present invention the length of said primary ribs  23  and secondary ribs  25  are each adjusted such that an ‘S’ shape is formulated when the terminals of each are connected by an imaginary line, and the terminals of the primary ribs  23  and secondary ribs  25  that face each other above and below are separated from contact. 
         [0035]    For example, according to the figure, the primary ribs  23  are sequentially places the 1 st  primary rib  23   a  to the 6 th  primary rib  23   f  starting from the left, wherein the 2 nd  secondary rib  25   b  is longer than the 1 st  primary rib  23   a,  and the 3 rd  primary rib  23   c  is shorter than the 2 nd  primary rib  23   b.    
         [0036]    Also, the lengths are adjusted such that the 4 th  primary rib  23   d  is longer than the 3 rd  primary rib  23   c,  the 5 th  primary rib  23   e  is shorter than the 4 th  primary rib  23   d,  the 6 th  primary rib  23   f  is shorter than the 5 th  primary rib  23   e.    
         [0037]    Therefore, when the terminals of the 1 st  primary rib  23   a  to 6 th  primary rib  23   f  are connected by an imaginary line, an overlap of two ‘S’ shapes(as shown by a dotted line in  FIG. 3 ) is formed. 
         [0038]    Like the primary ribs  23 , the secondary ribs  25  also consist of six ribs, formulates an overlap of two ‘S’ shapes when the terminals of the 1 st  to 6 th  secondary ribs  25  are connected by an imaginary line, and these primary ribs  23  and secondary ribs  25  are separated from contact. 
         [0039]    Accordingly, conventionally the terminals of each rib(refer to  5  in  FIG. 1 ) of the heat exchanger tube were aligned(in line) to formulate a comb shape and the flow of interior fluid was minor, but the present invention further includes an ‘S’ shaped flow component, thereby the fluid flowing along the interior side of the primary half part shell  22  and secondary half part shell  24  further fluctuates to increase the amount of heat contact among said fluid and the primary and secondary ribs  23  and  25 . 
         [0040]    Also, the amount of heat contact increases as there is more contact between a heat source fluid such as hot combustion gas and the primary and secondary ribs  23  and  25 , and heat delivery to the outer pipe  21  in contact with the primary half part shell  22  and secondary half part shell  24  increases, thus heat exchange with for example, direct water exterior of the outer pipe  21  is made more efficient. 
         [0041]    Yet, the primary half part insertion  22 ,  23  is formed by pressing out the primary half part shell  22  and primary rib  23  together, the secondary half part insertion  24 ,  25  is formed by pressing out the secondary half part shell  24  and secondary rib  25  together, and if the primary half part insertion  22 ,  23  and secondary half part insertion  24 ,  25  use the same formation cast, the cost of manufacturing can be minimized. 
         [0042]    Of course, in this case the primary half part insertion  22 ,  23  and secondary half part insertion  24 ,  25  must be assembled such that their sides are bilaterally symmetrical. 
         [0043]    Hereinafter, the heat exchanger pipe according to the second embodiment of the present invention is described with reference to the attached figures. 
         [0044]    As shown in  FIG. 4 , the heat exchanger pipe  30  following the second embodiment of the present invention consists of a cylinder shaped outer pipe  31  and the primary half part insertion  32 ,  33  and secondary half part insertion  34 ,  35  inserted within the interior of said outer pipe  31 . 
         [0045]    In this case, the primary half part insertion  32 ,  33  consists of the primary half part shell  32  and multible primary ribs  33 , the secondary half part insertion  34 ,  35  consists of the secondary half part shell  34  and multiple secondary ribs  35 . This point is equivalent to the first embodiment of the present invention explained above. 
         [0046]    However, the heat exchanger pipe according to the second embodiment of the present invention consists of the primary ribs  33 , sequentially placing the 1 st  primary rib  23  to the 5 th  primary rib  23  starting from the left of the figure, and the secondary ribs  35 , also consisting of five ribs, such that an ‘S’ shape is formed when the terminals of the five primary ribs  33  are sequentially connected, and the same for the secondary ribs  25 . 
         [0047]    In other words, the first embodiment as explained through  FIG. 3 , consists of six ribs(refer to  23 ,  25  of  FIG. 3 ), while the second embodiment of the present invention consists of five ribs  33 ,  35 , thereby the change in number of ribs can somewhat change the ‘S’ shape, but the invention allows increasing the heat exchange rate by increasing fluid flow even in this case. 
         [0048]    Hereinafter, referring to the attached figures the heat exchanger according to the third embodiment of the present invention is explained. 
         [0049]    Yet, the third embodiment of the present invention is based on the first embodiment, thus the differences are mainly shown and explained. 
         [0050]    As shown in (a) and (b) of  FIG. 5 , the heat exchanger pipe according to the third embodiment of the present invention includes the primary half part insertion  22 ,  23  and secondary half part insertion  24 ,  25  inserted in the interior of the cylinder shaped outer pipe(refer to  21  of  FIG. 2 ), the primary half part insertion  22 ,  23  consisting of the primary half part shell  22  and multiple primary ribs  23 , the secondary half part insertion  24 ,  25  consisting of the secondary half part shell  24  and multiple secondary ribs  25 . This point is identical to the primary embodiment of the present invention explained above. 
         [0051]    However, the third embodiment of the present invention includes the primary bend  22   a  and secondary bend  24   a,  used when assembling both terminals of the primary half part shell  22  and both terminals of the secondary half part shell  24 , the primary bend  22   a  and secondary bend  24   a  are distinguishable by observing each bending outward based on each the primary bent side  22   a ′ and secondary bent side  24   a′.    
         [0052]    In other words, both terminals of the primary half part shell  22  and both terminals of the secondary half part shell  24  each consist of flat forms, herein a certain length from the terminal of the flat primary half part shell  22  as in (a) of  FIG. 5  includes a primary bend bent  22   a  towards the outer pipe  31 , and a certain length from the terminal of the flat secondary half part shell  24  includes a secondary bend  24   a  bent towards said outer pipe  31 . 
         [0053]    Thus, as (b) of  FIG. 5 , when pressure is applied during assembling, in the process such that the outer pipe  21  is compressed and adhered to the outer surface of the primary half part shell  22  and secondary half part shell  24 , the primary bend  22   a  and secondary bend  24   a  are pressed and spread to the inner side, and the flat terminal of the primary half part shell  22  and the flat terminal of the secondary half part shell  24  are slightly oppressed and transformed and eventually tightly assembled together through adhesion. 
         [0054]    Therefore, conventionally the force actually applied during assembly(refer to ‘Fr’ of  FIG. 1 ) is applied orthogonal to the outer surface of each exterior tube  1 , while the force(refer to ‘Fn’ of  FIG. 1 ) needed to tightly adhere the groove type recess  7  and rib type tongue  8  is not identical in direction to the actual applied force, thus the problem regarding the gap formed between the groove type recess  7  and rib type tongue  8  is resolved. 
         [0055]    In addition, as the fourth embodiment of the present invention shown in  FIG. 6 , if multiple primary bumps  22   b  are formed on the flat side of the primary half part shell  22  and multiple secondary bumps(not shown) are formed on the flat side of the secondary half part shell  24 , pressure can be applied evenly on the outer pipe  21  as above and when assembled said primary bumps  22   b  and secondary bumps adhere better as they interlock. 
         [0056]    Of course, if slight incision grooves  22   c  are made in each bent sides of the primary bend  22   a  and secondary bend  24   a,  when the outer pipe  21  is assembled by equally applying pressure on the entire pipe, the direction the primary bend  22   a  and secondary bend  24   a  are straightened is directed, thus can be assembled easily. 
         [0057]    Hereinafter, referring to the attached figures, the heat exchanger according to the fifth embodiment is explained. 
         [0058]    As shown in  FIG. 7 , the heat exchanger pipe according to the fifth embodiment of the present invention includes an outer pipe  41  and an insertion  42 , as described above, which consists of a primary half part insertion and secondary half part insertion. This point is equivalent to explanations above. 
         [0059]    However, in the fifth embodiment of the present invention a heat exchange groove  41   a  is formed on the surface of the outer pipe  41  in order to expand surface area, thus heat of the fluid (i.e., hot combustion gas etc.) flowing within the interior of the outer pipe  41  can be more efficiently transferred to the fluid(i.e., direct water etc.) filling the exterior of the outer pipe  41 . 
         [0060]    Yet,  FIG. 7  exemplifies the formation of multiple of the linear shaped heat exchange grooves formed along the length of the outer pipe  41  around the outer pipe  41  along the circumference, but forming multiple of them along the circumference of the outer pipe  41  or along the length of the circular heat exchange groove with regular intervals and forming heat exchange grooves on the outer surface of the outer pipe  41  along various patterns such as a spiral helix are also possible. 
         [0061]    Hereinafter, the heat exchanger pipe according to the sixth embodiment of the present invention is explained in reference to the attached figures. 
         [0062]    As shown in  FIG. 8 , the heat exchanger pipe  50  according to the sixth embodiment of the present invention includes an outer pipe  51  and an insertion  52 , as described above, which consists of a primary half part insertion and secondary half part insertion. 
         [0063]    In particular, a trap tongue  51   a  projecting towards the inner side on which said insertion  52  is inserted is formed at both terminals of the outer pipe  51 , and the trap tongues  51   a  are formed on both length-wise terminals of the insertion  52  in the outer pipe  51 . 
         [0064]    Therefore, since the insertion  52  is sturdily fixed without moving towards the terminal of one side or the other of the outer pipe  51 , by applying pressure to the entire outer pipe the concerned insertion  52  is prevented from breaking away from the outer pip  51  after the inner surface of the outer pipe  51  and the outer surface of the insertion  52  are assembled to be in contact. 
         [0065]    Hereinafter, the manufacturing method of the heat exchanger pipe as in the embodiments of the present invention above is explained. Yet, as an example, the manufacturing method of a heat exchanger pipe according to the first embodiment of the present invention explained with reference to  FIG. 2  will be explained hereinafter. 
         [0066]    First, as shown in (a) of  FIG. 9 , tables T, T′ are prepared for the manufacture of heat exchangers according to the present invention. Tables T, T′ consist of a lower portion table T and an upper portion table T′ fixed on top of said lower portion table T. 
         [0067]    The upper portion table T′ is of size identical to the diameter of the primary half part shell  22  and secondary half part shell  24  assembled to each other, thus the primary half part shell  22  and secondary half part shell  24  can be stably put on top, and the lower portion table T has a bigger diameter than the upper portion table T′, so the outer pipe  21  can be put. 
         [0068]    Next, as (b) of  FIG. 9 , the primary half part shell  22  and secondary half part shell  24  assembled facing each other is put erect on top of the upper portion table T′. In other words, the primary half part insertion  22 ,  23  and secondary half part insertion  24 ,  25  are prepared(insertion preparation step). 
         [0069]    Next, as (c) of  FIG. 9 , the outer pipe  21 ′ of the prototype is put erect on top of the lower portion table so that the primary half part shell  22            secondary half part shell  24  are put within the inner side of the outer pipe  21 ′ (outer pipe preparation step). The unprocessed outer pipe  21 ′ of the prototype has a diameter bigger than the diameter of the assembled primary half part shell  22  and secondary half part shell  24  put together, thus can be inserted through the upper part of the primary half part shell  22  and secondary half part shell  24 . 
         [0070]    Next, as D of  FIG. 9 , the interior of the inner side is furnished with a taper component, which narrows down in width towards the upper side, the upper side of said taper component is equipped with a pressure applying component, the lower part diameter of the taper component is identical(or, may be slightly bigger) in diameter with the outer pipe  21 , and the diameter of the pressure applying component arranges a dies mold D, with diameter equivalent to (or, may be slightly smaller) the diameter of the primary half part shell  22  and secondary half part shell  24  put together, at the upper side of the outer pipe  21 (preparation step to apply pressure). 
         [0071]    Next, as (e) of  FIG. 9 , in a condition such that said dies mold D is descended until the circular outer pipe  21 ′ is inserted in the interior of said dies mold D, pressure is applied so that said dies mold D is pushed down to to apply pressure on the circular outer pipe  21 ′ with the pressure applying component, and the inner surface of the outer pipe  21  such that the circular outer pipe  21 ′ is contracted is adhered to the outer surface of said primary half part shell  22  and secondary half part shell  24 , thus manufacturing of the heat exchanger pipe is made convenient and simple. 
         [0072]    In conclusion, the embodiments of the present invention have been described. However, those skilled in the art will appreciate that the spirit and scope of the present invention are not limited to the specific embodiments, but various modifications and transformations are possible, without departing from the essence of the invention. 
         [0073]    Therefore, the described preferred embodiments are provided to illustrate the scope of the invention to those skilled in the art, are foreshadowing in all aspects and must be understood as not being limiting. The scope of the present invention will be defined in the accompanying claims.