Patent Application
20140131021
1. Field of the Invention
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'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.
2. Description of the Related Art
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.
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.
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.
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.
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.
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.
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'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.
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.
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.
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.
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.
Also, preferably heat exchange grooves are formed on the surface of said outer pipe to expand surface area.
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.
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.
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.
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.
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.
First, the heat exchanger pipe 20 according to the first embodiment of the present invention, as in the perspective view of
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.
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.
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.
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.
For example, according to the figure, the primary ribs 23 are sequentially places the 1st primary rib 23a to the 6th primary rib 23f starting from the left, wherein the 2nd secondary rib 25b is longer than the 1st primary rib 23a, and the 3rd primary rib 23c is shorter than the 2nd primary rib 23b.
Also, the lengths are adjusted such that the 4th primary rib 23d is longer than the 3rd primary rib 23c, the 5th primary rib 23e is shorter than the 4th primary rib 23d, the 6th primary rib 23f is shorter than the 5th primary rib 23e.
Therefore, when the terminals of the 1st primary rib 23a to 6th primary rib 23f are connected by an imaginary line, an overlap of two ‘S’ shapes(as shown by a dotted line in
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 1st to 6th secondary ribs 25 are connected by an imaginary line, and these primary ribs 23 and secondary ribs 25 are separated from contact.
Accordingly, conventionally the terminals of each rib(refer to 5 in
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.
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.
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.
Hereinafter, the heat exchanger pipe according to the second embodiment of the present invention is described with reference to the attached figures.
As shown in
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.
However, the heat exchanger pipe according to the second embodiment of the present invention consists of the primary ribs 33, sequentially placing the 1st primary rib 23 to the 5th 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.
In other words, the first embodiment as explained through
Hereinafter, referring to the attached figures the heat exchanger according to the third embodiment of the present invention is explained.
Yet, the third embodiment of the present invention is based on the first embodiment, thus the differences are mainly shown and explained.
As shown in (a) and (b) of
However, the third embodiment of the present invention includes the primary bend 22a and secondary bend 24a, 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 22a and secondary bend 24a are distinguishable by observing each bending outward based on each the primary bent side 22a′ and secondary bent side 24a′.
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
Thus, as (b) of
Therefore, conventionally the force actually applied during assembly(refer to ‘Fr’ of
In addition, as the fourth embodiment of the present invention shown in
Of course, if slight incision grooves 22c are made in each bent sides of the primary bend 22a and secondary bend 24a, when the outer pipe 21 is assembled by equally applying pressure on the entire pipe, the direction the primary bend 22a and secondary bend 24a are straightened is directed, thus can be assembled easily.
Hereinafter, referring to the attached figures, the heat exchanger according to the fifth embodiment is explained.
As shown in
However, in the fifth embodiment of the present invention a heat exchange groove 41a 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.
Yet,
Hereinafter, the heat exchanger pipe according to the sixth embodiment of the present invention is explained in reference to the attached figures.
As shown in
In particular, a trap tongue 51a 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 51a are formed on both length-wise terminals of the insertion 52 in the outer pipe 51.
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.
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
First, as shown in (a) of
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.
Next, as (b) of
Next, as (c) of 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.
Next, as D of
Next, as (e) of
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.
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.
