KR102207962B1 - Tube assembly for tube frame type heat exchanger and Tube frame type heat exchanger including the same - Google Patents

Abstract

The present invention improves the heat exchange efficiency between the heating medium and the combustion gas, prevents high-temperature oxidation and burnout of the turbulator due to the combustion heat of the combustion gas, and prevents deformation and damage of the tube that may occur in a high water pressure environment, thereby improving durability. An object thereof is to provide an improved tube assembly for a tubular heat exchanger and a tubular heat exchanger including the same.
The tube assembly for a tubular heat exchanger of the present invention for implementing this includes: a tube having a flat shape to allow combustion gas generated in a combustion chamber to flow along the inside and heat exchange with a heat medium flowing outside; A turbulator coupled to the inner side of the tube to induce turbulence in the flow of the combustion gas, wherein the turbulator includes an upper portion of the turbulator provided in the sensible heat exchanger on the inlet side of the combustion gas and combustion A combustion gas flow path between the lower part of the turbulator and the inner surface of the tube to correspond to a temperature and volume change of the combustion gas passing through the tube, consisting of a lower portion of the turbulator provided in the latent heat heat exchange unit on the discharge side of the gas The area is formed to be smaller than the area of the combustion gas flow path between the upper portion of the turbulator and the inner surface of the tube.

Description

Tube assembly for tube frame type heat exchanger and Tube frame type heat exchanger including the same}

The present invention relates to a tube assembly for a tubular heat exchanger and a tubular heat exchanger including the same, and more particularly, a tube assembly for a tubular heat exchanger capable of improving heat exchange efficiency and preventing deformation and damage even in a high water pressure environment. And it relates to a tubular heat exchanger comprising the same.

In general, a heating device includes a heat exchanger that performs heat exchange between a combustion gas and a heat medium by combustion of fuel, thereby performing heating or supplying hot water using the heated heat medium.

Among the heat exchangers, the tubular heat exchanger has a structure in which a plurality of tubes through which combustion gas generated by combustion of a burner flows inside, and a heat medium flows outside the tube to exchange heat between the combustion gas and the heat medium.

As a prior art related to such a tubular heat exchanger, FIGS. 1 and 2 show a heat exchanger disclosed in EP 2508834, and FIGS. 3 and 4 show a heat exchanger disclosed in EP2437022.

In the case of the heat exchanger shown in FIGS. 1 and 2, the outer jacket has a conical shape in a downward direction with respect to the upper cover 10, and the combustion chamber 4, the upper plate 2, and the upper plate are inside the outer jacket. It consists of a plurality of pipes at the bottom, and a lower plate 3 below it. Three types of diaphragms (5,6,7) are installed between the upper panel (2) and the lower panel (3), and the upper diaphragm (5) has a conical shape (angle of 90˚<β<180˚) and is It has an opening. The intermediate diaphragm 6 is a flat plate smaller than or similar to the diameter of the outer cylinder, and the lower diaphragm 7 has a diameter similar to that of the outer cylinder and has a structure having an opening in the center. Regular distribution holes are added to the above diaphragm, which is a structure arranged in a single circle or a number of concentric circles.

The combustion gas generated through combustion of the burner fastened to the upper cover 10 is subjected to primary heat exchange in the combustion chamber 4, and the sensible heat and latent heat of the combustion gas are transferred to the fluid inside the heat exchanger through a plurality of pipes. The fluid inside the heat exchanger flows through the fluid inlet (11), passes through the central opening of the lower diaphragm (7), flows outside the diameter of the intermediate diaphragm (6), and flows through the central opening of the upper diaphragm (5). It is discharged to the outlet 12.

In the case of the heat exchanger shown in Figs. 3 and 4, it is similar to the structure shown in Figs. 1 and 2, but the upper plate 2 and the lower plate 3 have a conical shape.

In the case of the flat shape and embossed pipe applied to the conventional heat exchanger shown in Figs. 1 to 4, it is applicable to low-pressure boilers, but to equipment with high pressure in the operating environment such as water heaters, commercial products, and large-capacity boilers. There is a disadvantage that it cannot be applied due to the high possibility of occurrence of deformation and damage. In order to solve this problem, the thickness of the material to be applied must be increased, resulting in a significant increase in material cost.

In addition, if the number of embossing is increased to increase heat exchange efficiency, since the upper part of the pipe, the passage through which the high-temperature combustion gas flows with a large volume per unit mass, and the lower part of the pipe through which the low-temperature combustion gas flows are the same, The flow resistance is largely generated at the top of the pipe, and if the number of embossing is reduced to solve this problem, there is a disadvantage that the heat exchange efficiency of the latent heat portion where the condensing effect occurs is significantly lowered.

The method of increasing the number of embosses in the latent heat portion cannot be manufactured more than a certain quantity due to the shape and size of the embossing, and even if applied, the manufacturing process becomes complicated and the manufacturing cost increases.

In the case of the inner diaphragm, the number of parts is increased due to the three types of different shapes due to the conical outer cylinder.In particular, the upper diaphragm has a conical shape, which increases the processing cost and makes the assembly process of the heat exchanger difficult. There is this.

In addition, in the case of a tube with a flat shape applied to a conventional heat exchanger, it can be applied to a low pressure boiler (operating pressure: 6 kg/㎠ or less), but it is applicable to equipment with high pressure in the operating environment such as water heaters, commercial products, and large-capacity boilers. There is a disadvantage that the tube cannot be applied due to the high possibility of deformation and breakage. In order to solve this problem, the thickness of the material to be applied must be increased, resulting in a decrease in heat exchange capability, a decrease in manufacturability with an increase in processing difficulty, and an increase in cost.

The present invention has been devised to solve the above problems, improves the heat exchange efficiency between the heating medium and the combustion gas, prevents high-temperature oxidation and burnout of the turbulator due to the combustion heat of the combustion gas, and occurs in an environment with high water pressure. An object thereof is to provide a tube assembly for a tubular heat exchanger capable of improving durability by preventing deformation and damage of the tube, and a tubular heat exchanger including the same.

The tube assembly for a tubular heat exchanger of the present invention for realizing the object as described above includes: a tube made of a flat shape to allow combustion gas generated in a combustion chamber to flow along the inside and heat exchange with a heat medium flowing outside; A turbulator coupled to the inner side of the tube to induce turbulence in the flow of the combustion gas, wherein the turbulator includes an upper portion of the turbulator provided in the sensible heat exchanger on the inlet side of the combustion gas and combustion A combustion gas flow path between the lower part of the turbulator and the inner surface of the tube to correspond to a temperature and volume change of the combustion gas passing through the tube, consisting of a lower portion of the turbulator provided in the latent heat heat exchange unit on the discharge side of the gas The area is formed to be smaller than the area of the combustion gas flow path between the upper portion of the turbulator and the inner surface of the tube.

The turbulator is an upper turbulator that is coupled to an upper inner side of the tube adjacent to the combustion chamber so as to be in surface contact with the tube to increase thermal conductivity and to induce turbulence in the flow of the combustion gas, and the upper turbulator It may be configured as a lower turbulator that is coupled to the inner side of the tube to the lower side of the radar to induce turbulence in the flow of the combustion gas.

The upper turbulator has a shape corresponding to one side of the tube and includes a first tube contact surface that is in surface contact with the inner side of one side of the tube, and a shape corresponding to the other side of the tube. It may consist of a second portion including a second tube contact surface that is in surface contact with the inner surface of the other side of the tube.

The first part and the second part of the upper turbulator may be processed by bending one base plate based on a center line of the base plate.

In the upper turbulator, a first pressure support part is formed by cutting a part of the first tube contact surface to be bent so that an outer end is positioned on the same line as the outer surface of the second tube contact surface to support the other side of the tube; and A second pressure support portion may be formed by cutting a portion of the second tube contact surface and bending it to be positioned on the same line as the outer surface of the first tube contact surface to support one side of the tube.

In the upper turbulator, a first guide portion bent toward the inner space of the tube by cutting a portion of the first tube contact surface, and a portion of the second tube contact surface to be cut to face the inner space of the tube. A bent second guide part is formed, the first guide part and the second guide part are vertically spaced apart and alternately formed to induce a change in the flow direction of the combustion gas.

In the upper turbulator, a portion of the first incision cut from the first tube contact surface is bent to protrude toward the second tube contact surface, and a second incision cut from the second tube contact surface Part of the portion is bent to form a second pressure support portion protruding toward the first tube contact surface, and a protruding end of the first pressure support portion contacts the second tube contact surface, and the second pressure support portion protrudes. The formed end may be configured to pass through the first incision and contact the inner surface of the tube.

The first pressure support part and the second pressure support part are spaced apart in the front-rear direction and the vertical direction, and are provided in plural, but the first pressure support part located on the upper side and the first pressure support part located on the lower side do not overlap in the vertical direction. The second pressure support unit disposed on the upper side and the second pressure support unit disposed at the lower side may be provided at a position that does not overlap in the vertical direction.

The first pressure support part and the second pressure support part may have a plate shape, and both side surfaces having a large area may be disposed in parallel with the flow direction of the combustion gas.

In the turbulator, the inner space of the tube is divided into both sides, and a flat portion disposed in the longitudinal direction of the tube, a plurality of first guide pieces formed to protrude alternately inclinedly spaced apart along the longitudinal direction on both sides of the flat portion; It may include a second guide piece.

The first guide piece is disposed inclined to one side on one side of the flat portion, and the second guide piece is disposed inclined to the other side on the other side of the flat portion, and the heat medium introduced into the first guide piece and the second guide piece May be configured to alternately flow through spaces on both sides of the flat portion by sequentially taking over the second guide pieces and the first guide pieces disposed adjacent to opposite sides of the flat portion, respectively.

The heat medium inlet end of the first guide piece is connected to one end of the flat portion by a first connecting piece, and fluid communication is made between one end of the flat portion and the first connecting piece and the first guide piece in both spaces of the flat portion. A communication port is provided, and the heat medium inlet end of the second guide piece is connected to the other end of the flat part by a second connection piece, and at the same time, the space on both sides of the flat part is between the other side end of the flat part and the second connection piece and the second guide piece. A second communication port through which fluid communication is performed may be provided.

The first guide piece and the second guide piece are partially cut out of the flat portion and bent to both sides of the flat portion, respectively, and fluid communication to the spaces on both sides of the flat portion through the cut portions of the first guide piece and the second guide piece This can be done.

The distance between the plurality of first guide pieces and the second guide pieces formed in the lower part of the turbulator is vertically spaced apart from the distance between the plurality of first guide pieces and the second guide pieces formed in the upper part of the turbulator. They can be arranged at more tightly spaced intervals.

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The lower portion of the lower turbulator may have a larger area in contact with the combustion gas inside the tube than the upper portion of the upper turbulator.

A plurality of protrusions may be formed on the inner surface of the tube located on the discharge side of the combustion gas.

The upper and lower ends of the lower turbulator may be vertically spaced so as to contact both side surfaces of the tube, protruding forward and rearward, and supporting portions spaced apart from each other.

The upper and lower ends of the lower turbulator may be vertically spaced apart so as to contact the front and rear surfaces of the tube, protruding forward and rearward, and support pieces spaced up and down, respectively.

It is formed on the inner side of the tube, it may be configured to further include a pressure support for supporting an external pressure acting on opposite sides of the tube.

The pressure support portion may be formed in plural by a pair of dimples protruding from both side surfaces of the tube into the inner space of the tube and facing each other in a vertical direction.

The dimple may be formed by pressing the outer surface of the tube toward the inside of the tube after the turbulator is inserted into the tube.

A plurality of holes may be formed in the turbulator to allow the pair of dimples to pass through and contact them.

The pressure support portion may be formed of a supporter protruding outwardly from both side surfaces of the turbulator and in contact with the opposite inner surface of the tube.

The support may be formed by cutting a portion of the surface of the turbulator and bending it to both sides, respectively.

It is coupled to the turbulator may be configured to further include a supporter for supporting the external pressure acting on the tube.

A slit having an upper end and an open lower end is formed in a central portion of the supporter, and the turbulator and the supporter may be assembled by inserting the turbulator into the slit formed in the supporter in a longitudinal direction.

A slit having an upper end and a lower end of the supporter is formed on the surface of the supporter, and the turbulator and the supporter may be assembled by being inserted into the inner side of the slit formed in the supporter in one direction.

A plurality of slits spaced vertically apart from each other are formed on the surface of the turbulator, and the turbulator and the supporter may be assembled by inserting a portion of the supporter in a vertical direction inside the slit formed in the turbulator.

The slit may include a first incision formed with a width contacting both side surfaces of the turbulator, and a second incision formed with a width greater than that of the first incision, vertically connected and alternately formed.

A pair of first and second support pieces protruding so as to support both side surfaces of the supporter may be provided on both side surfaces of the turbulator and are spaced vertically apart from each other.

A plurality of protrusions protruding so as to contact the inner surface of the tube may be provided at an outer end of the supporter and spaced vertically apart.

A locking piece and a locking protrusion protruding to support both side surfaces of the supporter may be formed at the upper and lower ends of the turbulator.

The slit may be formed alternately with a first incision formed with a width contacting both side surfaces of the turbulator and a second incision formed with a width greater than that of the first incision.

The turbulator may have a clogged portion formed between the slits adjacent to each other, and the supporter may have a plurality of support grooves that are engaged with the clogged portion.

A plurality of protrusions protruding so as to contact the inner surface of the tube may be provided at an outer end of the supporter and spaced vertically apart.

The tubular heat exchanger of the present invention is coupled to the inside of the outer jacket so that a flow path of the heat medium is formed between the outer jacket through which the heat medium is introduced and discharged, and the combustion chamber in which the burner is burned, and the above-described It may be configured to include a tube assembly for a tubular heat exchanger.

The tubes are provided in plural and are vertically installed so that the combustion gas generated in the combustion chamber flows downwardly, spaced apart in a circumferential direction, and disposed radially.

A plurality of tubes may be additionally disposed at a central portion between the plurality of radially disposed tubes.

Inside the outer jacket, a multi-stage diaphragm for guiding the flow of the heating medium may be provided vertically spaced apart so that the flow direction of the heating medium is alternately switched to the inside and the outside in the radial direction.

The tube may be provided in plural and may be supported by being inserted into the multi-stage diaphragm.

The multi-stage diaphragm is composed of a plate-shaped upper diaphragm, an intermediate diaphragm, and a lower diaphragm, and the upper and lower diaphragms have an opening formed at the center for the flow of the heat medium, and the edge is on the inner surface of the outer jacket. It is provided so as to be in contact, and the middle portion of the diaphragm may be formed in a shape in which the central portion is closed, and the edge portion may be provided so that the heat medium flows therebetween by being spaced apart from the inner surface of the outer jacket.

An upper tube sheet into which upper ends of the plurality of tubes are inserted may be coupled to a lower end of the combustion chamber, and a lower tube sheet into which lower ends of the plurality of tubes are inserted may be coupled to a lower end of the outer jacket.

The outer jacket may have a cylindrical shape.

According to the present invention, it is possible to improve heat exchange efficiency by promoting turbulence in the flow of combustion gas by providing a turbulator inside the tube.

In addition, high temperature oxidation and burnout by combustion heat is prevented by providing an upper turbulator at the top of the tube located close to the combustion chamber to increase thermal conductivity by being in close contact with the tube, and turbulence is generated in the flow of combustion gas at the lower side of the upper turbulator. By providing the lower turbulator for inducing the, it is possible to improve the heat exchange efficiency between the combustion gas and the heat medium.

In addition, the upper turbulator is provided with a pressure support unit, and the lower turbulator is provided with a first support unit and a second support unit, and a first support piece and a second support piece to prevent deformation and damage of the tube even in a high water pressure environment. In addition to boilers, it can be applied to water heaters (operating pressure: 10 kg/㎠ or more) and commercial (large capacity) products.

In addition, the upper turbulator consists of a symmetrical first part and a second part, but the first part and the second part of the upper turbulator are manufactured by bending one base plate based on its center line and processing it. The process can be simplified.

In addition, the space provided between the lower part of the turbulator provided in the latent heat heat exchange part and the inner surface of the tube compared to the area of the flow path of the combustion gas, which is a space provided between the upper part of the turbulator provided in the sensible heat exchanger and the inner surface of the tube. By configuring the flow path area of the combustion gas to be small, it is possible to improve heat exchange efficiency by reducing the flow resistance of the combustion gas in the sensible heat heat exchanger through which the combustion gas flows, and increasing the recovery efficiency of the latent heat in the latent heat heat exchanger.

In addition, by forming the sensible heat heat exchange unit and the latent heat heat exchange unit in an integrated structure, the structure of the heat exchanger can be simplified, the welding area between parts can be reduced, and the compact and highly efficient heat exchanger can be implemented by configuring the tube in a flat shape.

In addition, since the turbulator and the supporter are inserted in the longitudinal direction, the unidirectional direction, or the vertical direction, they are inserted and assembled into the inner side of the tube, so that the assembly structure of the tube assembly can be simplified.

In addition, by forming an uneven protrusion on the outer surface of the supporter to reduce the contact area between the supporter and the tube, it is possible to prevent the occurrence of crevice corrosion that may be caused by stagnation of the heat medium when the contact area between the supporter and the tube is large. Thus, it is possible to improve the durability of the tube assembly.

In addition, by disposing a multi-stage diaphragm on the flow path of the heating medium to change the flow direction of the heating medium, the flow path of the heating medium is lengthened, improving heat exchange efficiency, and increasing the flow velocity of the heating medium, resulting in localized stagnation of the heating medium. It is possible to prevent the occurrence of boiling noise and deterioration in thermal efficiency caused by overheating of phosphorus and thereby solidifying and depositing foreign substances contained in the heat medium.

1 is a cross-sectional perspective view showing an embodiment of a conventional tubular heat exchanger,
Figure 2 is a cross-sectional view of Figure 1,
3 is a cross-sectional perspective view showing another embodiment of a conventional tubular heat exchanger,
Figure 4 is a cross-sectional view of Figure 3,
5 is an external perspective view of the tubular heat exchanger according to the present invention,
6 and 7 are exploded perspective views of the tubular heat exchanger according to the present invention,
Figure 8 is a plan view of Figure 5;
9 is a cross-sectional perspective view taken along line AA of FIG. 8;
10 is a cross-sectional view taken along line AA of FIG. 8;
11 is a perspective perspective view of a tube assembly for a tubular heat exchanger according to a first embodiment of the present invention,
12 is a plan view of FIG. 11;
13 is an exploded perspective view showing an assembly process of the tube assembly for a tubular heat exchanger according to the first embodiment of the present invention;
14 is a front view of an upper turbulator and a lower turbulator according to a first embodiment of the present invention;
FIG. 15 is a (a) cross-sectional view along line BB of FIG. 14, and (b) a cross-sectional perspective view,
16 is a side view for explaining a processing process for implementing the shape of the upper turbulator according to the first embodiment of the present invention;
17 is a front view for explaining a processing process for implementing a shape of an upper turbulator according to the first embodiment of the present invention;
18 is a perspective view of an upper turbulator of a tube assembly for a tubular heat exchanger according to a second embodiment of the present invention;
19 is a plan view of FIG. 18;
FIG. 20 is a (a) cross-sectional view along the line DD of FIG. 19 and (b) a cross-sectional perspective view,
21 is a left side view of FIG. 18;
22 is an external perspective view of a tube assembly for a tubular heat exchanger according to a third embodiment of the present invention,
23 is a perspective perspective view of a tube assembly for a tubular heat exchanger according to a third embodiment of the present invention,
24 is an exploded perspective view showing an assembly and processing process of a tube assembly for a tubular heat exchanger according to a third embodiment of the present invention;
25 is a front view of a turbulator according to a third embodiment of the present invention,
26 is a (a) front view of a tube assembly for a tubular heat exchanger according to a third embodiment of the present invention, (b) a cross-sectional view along line EE,
27 is a perspective perspective view of a tube assembly for a tubular heat exchanger according to a fourth embodiment of the present invention,
28 is an exploded perspective view showing an assembly process of a tube assembly for a tubular heat exchanger according to a fourth embodiment of the present invention;
29 is a front view of a turbulator according to a fourth embodiment of the present invention,
FIG. 30 is a plan view of FIG. 27;
31 is an exploded perspective view showing an assembly process of a tube assembly for a tubular heat exchanger according to a fifth embodiment of the present invention;
FIG. 32 is a (a) front view of the turbulator shown in FIG. 31 and (b) a perspective view showing the flow of combustion gas;
33 is a cross-sectional view showing a tube shape at an outlet side of a combustion gas of a tube assembly for a tubular heat exchanger according to a fifth embodiment of the present invention;
34 is a cross-sectional view showing various embodiments of a support structure for a tube;
35 is a perspective perspective view of a tube assembly for a tubular heat exchanger according to a sixth embodiment of the present invention;
Figure 36 is a plan view of Figure 35;
37 is an exploded perspective view showing an assembly process of a tube assembly for a tubular heat exchanger according to a sixth embodiment of the present invention;
38 is a front view of (a) a turbulator according to a sixth embodiment of the present invention, (b) a side view of a supporter,
39 is a perspective perspective view of a tube assembly for a tubular heat exchanger according to a seventh embodiment of the present invention;
40 is an exploded perspective view showing an assembly process of a tube assembly for a tubular heat exchanger according to a seventh embodiment of the present invention;
41 is a front view of (a) a turbulator according to a seventh embodiment of the present invention, (b) a side view of a supporter,
42 is a perspective perspective view of a tube assembly for a tubular heat exchanger according to an eighth embodiment of the present invention,
43 is an exploded perspective view showing an assembly process of a tube assembly for a tubular heat exchanger according to an eighth embodiment of the present invention;
44 is a front view of (a) a turbulator and (b) a side view of a supporter according to an eighth embodiment of the present invention.

Hereinafter, the configuration and operation of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

5 to 10, in the tubular heat exchanger 1000 according to the present invention, a flow path of the heat medium is formed between the outer jacket 1100 through which the heat medium is introduced and discharged, and the outer jacket 1100. Combustion chamber 1200 coupled to the inside of the outer jacket 1100 and in which burner combustion occurs, and a plurality of flat shapes in which the combustion gas generated in the combustion chamber 1200 flows along the inside and heat exchange with the heat medium It is configured to include a tube assembly 100 including a tube and a turbulator that is coupled to the inner side of the tube to induce turbulence in the flow of the combustion gas and supports the tube. The configuration and operation of the various embodiments (100-1 to 100-8) of the tube assembly 100 having the tube and the turbulator will be described later.

In addition, an upper tube sheet 1300 into which upper ends of the plurality of tubes are inserted is coupled to a lower end of the combustion chamber 1200, and the flow direction of the heat medium alternates radially inside and outside the outer surface of the tube 1400. Multi-stage diaphragms (1600, 1700, 1800) for guiding the flow of the heat medium to be converted into a lower tube sheet (1600, 1700, 1800) are provided vertically spaced apart, and the lower end of the plurality of tubes is inserted at the lower end of the outer jacket 1100 1900) are combined.

The plurality of tubes are installed in a vertical direction so that the combustion gas generated in the combustion chamber 1200 flows downward, are spaced apart in a circumferential direction and disposed radially, and a plurality of tubes are disposed at a central portion between the plurality of radially disposed tubes. A tube of can be further arranged.

The outer jacket 1100 has a cylindrical shape with open upper and lower portions, a heat medium inlet 1110 is connected to a lower one side, and a heat medium discharge port 1120 is connected to an upper one side. As the outer jacket 1100 is configured in a cylindrical shape, the pressure resistance performance can be improved.

The combustion chamber 1200 is composed of a cylindrical combustion chamber body 1210 with open upper and lower portions, and a flange portion 1220 formed on the upper end of the combustion chamber body 1210 and seated on the upper end of the outer jacket 1100. . The combustion chamber body 1210 is disposed so as to be spaced from the inner surface of the outer jacket 1100 to the inside, and a space S4 having a blister structure through which the heat medium flows is provided between the combustion chamber body 1210 and the outer jacket 1100. .

Referring to FIG. 7, the upper tube sheet 1300 seals the lower portion of the combustion chamber 1200 and includes a plurality of tube insertion holes 1310 and 1320 to which the upper end of the tube 1400 is inserted and coupled.

The multi-stage diaphragms 1600, 1700, 1800 are coupled to the outer surface of the tube by being spaced apart from each other up and down, thereby changing the flow path of the heat medium and supporting the tube.

The multi-stage diaphragm 1600, 1700, 1800 may be formed of a plate-shaped upper diaphragm 1600, an intermediate diaphragm 1700, and a lower diaphragm 1800.

The upper diaphragm 1600 has a tube insertion hole 1610 radially formed therein, and the tube 1400 penetrates through the central portion of the upper diaphragm 1600 and an opening 1620 for the flow of the heat medium is formed, and the upper diaphragm ( The edge portion of 1600) is provided to contact the inner surface of the outer jacket 1100.

A plurality of tube insertion holes 1710 and 1720 are formed in the intermediate diaphragm 1700, a region in which the tube insertion holes 1710 and 1720 are not formed is formed in a closed shape, and the edge of the intermediate diaphragm 1700 is It is spaced apart from the inner surface of the outer jacket 1100 and a flow path of the heat medium is provided in the space G therebetween.

The lower diaphragm 1800 has the same structure as the upper diaphragm 1600, so that the tube insertion hole 1810 is radially formed, and the tube penetrates through the central part of the lower diaphragm 1800 and an opening for the flow of the heat medium ( 1820 is formed, and an edge portion of the lower diaphragm 1800 is provided to contact the inner surface of the outer jacket 1100.

The lower tube sheet 1900 seals the lower portion of the outer jacket 1100 and has a plurality of tube insertion holes 1910 and 1920 into which the lower end of the tube is inserted.

9 and 10, the tubular heat exchanger 1000 of the present invention includes a sensible heat heat exchange unit 1000a in which heat exchange between sensible combustion heat generated in the combustion chamber 1200 and a heat medium is performed, and the sensible heat heat exchange unit 1000a. A latent heat heat exchange unit 1000b in which heat exchange is performed between the latent heat of the combustion gas passing through and the heat medium is formed integrally.

The combustion gas generated in the combustion chamber 1200 flows downward along the inner space of the tube.

As shown by the arrow in FIG. 10, the heat medium introduced into the first space S1 inside the outer jacket 1100 through the heat medium inlet 1110 passes between the plurality of tubes, and then the lower diaphragm 1800 It flows through the opening 1820 formed in the central part of the second space S2 provided on the upper side thereof. The heat medium flowing outward from the second space S2 passes through the spaced space G between the middle diaphragm 1700 and the outer jacket 1100, and flows into the third space S3 provided above. . The heat medium flowing inward in the third space S3 passes through the opening 1620 formed in the center of the upper diaphragm 1600, and a fourth space S4 provided between the combustion chamber body 1210 and the outer jacket 1100 After passing through, it is discharged through the heat medium discharge port 1120.

In this way, as the flow direction of the heating medium is alternately switched to the inside and outside in the radial direction, the flow path of the heating medium becomes longer, improving heat exchange efficiency, and increasing the flow velocity of the heating medium, resulting in local overheating that can occur when the heating medium stagnates. It can prevent the phenomenon.

Hereinafter, embodiments of the tube assembly 100 for a tubular heat exchanger according to the present invention will be described.

<First Example>

11 to 17, in the tube assembly 100-1 for a tubular heat exchanger according to the first embodiment of the present invention, the combustion gas generated in the combustion chamber flows along the inside and heat exchange with the heating medium flowing outside. The tube 110-1 is formed in a flat shape so that it is coupled to surface contact with the tube 110-1 on the upper inner side of the tube 110-1 close to the combustion chamber to increase the thermal conductivity and the The flow of the combustion gas is coupled to the inside of the tube 110-1 to the lower side of the upper turbulator 120-1, and the upper turbulator 120-1 to induce the generation of turbulence in the flow of the combustion gas It is configured to include a lower turbulator (130-1) to induce the generation of turbulence.

The upper turbulator 120-1 has tube contact surfaces 121a-1, 121b-1; 121-1, which are in close contact with the inner surface of the tube 110-1, and the tube contact surfaces 121a-1, 121b-1; 121 It includes a pressure support portion (122a-1, 122b-1; 122-1) formed by bending the portion cut in -1) and a guide portion (123a-1, 123b-1; 123-1).

The tube contact surface 121-1 is a first tube contact surface 121a-1 that is in surface contact with the inner surface of one side of the tube 110-1 and a surface on the inner surface of the other side of the tube 110-1. The second tube contact surface 121b-1 to be brought into contact has a symmetrical structure.

The pressure support part 122-1 is a configuration for preventing deformation and damage of the tube 110-1 due to hydraulic pressure of the heat medium, and a part of the first tube contact surface 121a-1 is cut to prevent the second The first pressure support portion 122a-1 is bent so that the outer end is positioned on the same line as the outer surface of the tube contact surface 121b-1 to support the other side of the tube 110-1, and the second tube contact surface ( 121b-1) is bent to be positioned on the same line as the outer surface of the first tube contact surface 121a-1 to support one side of the tube 110-1. ).

The guide part 123-1 is a configuration for improving heat exchange efficiency by changing the flow direction of the combustion gas passing through the interior of the upper turbulator 120-1, and the first tube contact surface 121a-1 A part of the first guide part 123a-1 bent to face the inner space of the tube 100-1 and a part of the second tube contact surface 121b-1 are cut to form the tube 100 It consists of a second guide part (123b-1) bent toward the inner space of -1).

The first guide part 123a-1 and the second guide part 123b-1 are vertically spaced apart and alternately formed. Accordingly, the combustion gas flows while changing left and right based on the vertical direction as shown by the arrow in FIG. 15A.

16 and 17, the upper turbulator 120-1 includes a first part 120a-1 located on one side of the base plate and a first part 120a-1 located on the other side with respect to the center line C. The second part 120b-1 is bent and processed.

First, the first tube contact surface 121a-1, the first pressure support part 122a-1, and the first guide part 123a-1 are processed on the first part 120a-1 of the base plate. The second tube contact surface 121b-1, the second pressure support portion 122b-1, and the second guide portion 123b-1 are processed on the second portion 120b-1 of the base plate. And, the first part (120a-1) and the second part (120b-1) based on the center line (C) is bent in the direction of the arrow in Fig. 16(b) to manufacture the upper turbulator 120-1. do. According to this configuration, by bending the first portion (120a-1) and the second portion (120b-1) configured in a symmetrical shape with respect to the center line (C), for the implementation of the upper turbulator (120-1) The manufacturing process can be simplified.

According to the configuration of the upper turbulator 120-1, the tube contact surface 121-1 of the upper turbulator 120-1 and the inner surface of the tube 110-1 are in close contact with each other, so that the upper turbulator 120- It is possible to increase the thermal conductivity between 1) and the tube (110-1). Therefore, even if the combustion gas is in direct contact with the upper turbulator 120-1, the combustion heat of the combustion gas transferred to the upper turbulator 120-1 is smoothly transferred to the tube 110-1 by heat conduction. Overheating of the (120-1) can be prevented, thereby effectively preventing high-temperature oxidation and burnout of the upper turbulator (120-1).

Hereinafter, the configuration and operation of the lower turbulator 130-1 will be described.

The lower turbulator 130-1 divides the inner space of the tube 110-1 into both sides and includes a flat portion 131-1 disposed in the longitudinal direction of the tube 110-1, and the flat portion It may be configured to include a first guide piece (132-1) and a second guide piece (133-1) formed to protrude alternately obliquely spaced apart along the longitudinal direction on both sides of the (131-1).

The first guide piece 132-1 is disposed inclined to one side on one side of the flat portion 131-1, and the second guide piece 133-1 is It is arranged inclined to the other side on the side. Accordingly, the heat medium introduced into the first guide piece 132-1 and the second guide piece 133-1 is a second guide piece ( 133-1) and the first guide piece 132-1 are sequentially transferred to alternately flow through spaces on both sides of the flat portion 131-1.

The heat medium inlet end of the first guide piece 132-1 is connected to one end of the flat portion 131-1 by a first connecting piece 132a-1, and at the same time, one side of the flat portion 131-1 Between the end and the first connecting piece (132a-1) and the first guide piece (132-1), a first communication port (132b) through which fluid communication through the space on both sides of the flat portion (131-1) is provided.

The heat medium inlet end of the second guide piece 133 is connected to the other end of the flat portion 131 by a second connecting piece 133a, and at the same time, the other end of the flat portion 131 and the second connecting piece 133a and A second communication port 133b-1 is provided between the second guide pieces 133 to allow fluid communication to spaces on both sides of the flat portion 131.

In the first guide piece 132-1 and the second guide piece 133-1, a portion of the flat portion 131-1 is cut and bent to both sides of the flat portion 131-1, respectively, and the It may be configured to allow fluid communication to spaces on both sides of the flat portion 131-1 through the cut-out portion of the flat portion 131-1.

In addition, the upper and lower ends of the lower turbulator 130-1 are spaced up and down so as to contact both sides of the tube 110-1, protrude forward and rearward, and a first support part 134-1 positioned vertically spaced apart. And the second support part 135-1 are respectively formed.

And, the upper and lower ends of the lower turbulator (130-1) are spaced up and down so as to contact the front and rear surfaces of the tube (110-1), protruding forward and rearward, and a first support piece ( 136a-1,136b-1;136-1) and second support pieces 137a-1,137b-1;137-1, respectively.

By providing the first support portion (134-1) and the second support portion (135-1), the first support piece (136-1) and the second support piece (137-1) in the lower turbulator (130-1) , It can prevent deformation and damage of the tube even in the environment with high water pressure, so it can be applied to water heaters (operating pressure: 10 kg/㎠ or more) and commercial (large capacity) products in addition to boilers.

<Second Example>

18 to 21, a tube assembly for a tubular heat exchanger 100-2 according to a second embodiment of the present invention is a tube assembly 100-1 for a tubular heat exchanger according to the first embodiment described above. Among the configurations of, the configuration of the upper turbulator is changed, and the tube 110-1 and the lower turbulator 130-1 may have the same structure.

The upper turbulator 120-1-1 according to the present embodiment includes tube contact surfaces 124a-1, 124b-1; 124-1 that are in close contact with the inner side of the tube 100-1, and the tube contact surface 124a. -1,124b-1; 124-1) is formed by bending at the cut portion (126a-1,126b-1;126-1) of the pressure support (125a-1,125b-1;125-1).

The tube contact surface 124-1 is a first tube contact surface 124a-1 in surface contact with the inner surface of one side of the tube 110-1, and a surface on the inner surface of the other side of the tube 110-1. The second tube contact surface 124b-1 to be in contact has a symmetrical structure.

The pressure support unit 125-1 is a configuration for preventing deformation and damage of the tube 110-1 due to hydraulic pressure of the heat medium, and a first cut-out portion 126a-1 of the first tube contact surface 124a-1 ) Part of the first pressure support portion 125a-1 that is bent and protrudes toward the second tube contact surface 124b-1, and the second cut-out portion 126b-1 of the second tube contact surface 124b-1 A portion of the portion is bent and is composed of a second pressure support portion 125b-1 protruding toward the first tube contact surface 124a-1.

The cut-out area of the first cut-out part 126a-1 is formed larger than the cut-out area of the second cut-out part 126b-1, and the protruding end of the first pressure support part 125a-1 is a second cut-out area. When contacting the tube contact surface 124b-1 and inserting the pressure support unit 125-1 into the inner side of the tube 110-1, the protruding end of the second pressure support unit 125b-1 becomes the first incision It is provided to pass through (126a-1) and contact the inner surface of the tube (110-1).

According to this configuration, the first pressure support unit 125a-1 supports the first tube contact surface 124a-1 and the second tube contact surface 124b-1 to firmly maintain the shape of the water pressure, and the The second pressure support unit 125b-1 more firmly supports the tube 110-1 supported by the first tube contact surface 124a-1 and the second tube contact surface 124b-1.

And, as shown in Figure 21, the first pressure support (125a-1) and the second pressure support (125b-1) is provided in a plurality of spaced apart in the front-rear direction and the vertical direction, the first The pressure support part 125a'-1 and the first pressure support part 125a"-1 located at the lower side are provided at a position that does not overlap in the vertical direction, and the second pressure support part 125b'-1 located at the upper side and The second pressure supporting part 125b"-1 located at the lower side is also provided at a position that does not overlap in the vertical direction. According to this configuration, the first pressure support unit 125a-1 and the second pressure support unit 125b-1 are provided in a zigzag shape in the front and rear and vertical directions over the entire area of the upper turbulator 120-1-1. Thus, the water pressure acting on the tube 110-1 is evenly distributed, so that deformation and damage of the tube 110-1 can be effectively prevented.

In addition, the first pressure support portion (125a-1) and the second pressure support portion (125b-1) is made in a plate shape, but has a structure in which both side surfaces having a large area form a direction parallel to the flow direction of the combustion gas, As indicated by the arrows in FIG. 20A, the flow resistance can be minimized in the process of passing the combustion gas through the first pressure support unit 125a-1 and the second pressure support unit 125b-1 when the combustion gas flows. have.

In the processing of the tube assembly 100-2 according to the present embodiment, as in the above-described first embodiment, one base plate is placed on one side with respect to the center line C of the first part 120a-1 and The second part 120b-1 located on the other side may be bent and processed.

<Third Example>

22 to 26, the tube assembly 100-3 for a tubular heat exchanger according to a third embodiment of the present invention has a flat shape in which combustion gas flows along the inside and heat exchange with the heating medium flowing outside. A tube (110-2) made of, and a turbulator (120-1-2) coupled to the inner side of the tube (110-2) to induce generation of turbulence in the flow of the combustion gas, and the tube (110- It is formed on the inside of 2), and is configured to include a pressure support portion for supporting external pressure acting on opposite sides of the tube (110-2).

The pressure support part has a pair of dimples 111a-2, 111b-2 and 111-2 protruding from both sides of the tube 110-2 into the inner space of the tube 110-2 and facing each other up and down. It consists of a plurality of spaced apart.

24 and 26, the dimples 111a-2, 111b-2; 111-2 are, after the turbulator 120-1-2 is inserted into the tube 110-2, FIG. As indicated by the arrow of 24, it is formed by a process of pressing the outer surface of the tube 110-2 toward the inside of the tube 110-2. In addition, in the turbulator 120-1-2, a plurality of holes 128-2 through which the pair of dimples 111a-2, 111b-2; 111-2 penetrate and contact when external pressure increases. ) Is formed.

In this way, by forming a dimple (111a-2, 111b-2; 111-2) on the outer surface of the tube (110-2) into which the turbulator (120-1-2) is inserted to implement a pressure support, additional parts are added. Since it is possible to implement the pressure support without the need, it is possible to reduce the manufacturing cost of the tube assembly having excellent pressure resistance.

Referring to FIG. 25, the turbulator 120-1-2 divides the inner space of the tube 110-2 into both sides, and a flat portion 121- disposed in the longitudinal direction of the tube 110-2. 2), and a first guide piece 122-2 and a second guide piece 123-2 formed to protrude alternately inclinedly spaced apart in the longitudinal direction on both sides of the flat portion 121-2. I can.

The first guide piece 122-2 is disposed to be inclined to one side on one side of the flat portion 121-2, and the second guide piece 123-2 is the other of the flat portion 121-2. It is arranged inclined to the other side on the side. Therefore, the heat medium introduced into the first guide piece 122-2 and the second guide piece 123-2 is a second guide piece disposed adjacent to the opposite side of the flat portion 121-2 ( 123-2) and the first guide piece 122-2 in order to flow alternately in spaces on both sides of the flat portion 121-2.

The heat medium inlet end of the first guide piece 122-2 is connected to one end of the flat portion 121-2 by a first connecting piece 122a-2, and at the same time, one side of the flat portion 121-2 A first communication port 122b-2 is provided between the end and the first connecting piece 122a-2 and the first guide piece 122-2 through which fluid communication is made to the spaces on both sides of the flat portion 121-2.

The heat medium inlet end of the second guide piece 123-2 is connected to the other end of the flat portion 121-2 by a second connecting piece 123a-2, and at the same time, the other side of the flat portion 121-2 A second communication port 123b-2 is provided between the end and the second connecting piece 123a-2 and the second guide piece 123-2 through which fluid communication is made to the space on both sides of the flat portion 121-2.

In the first guide piece 122-2 and the second guide piece 123-2, a portion of the flat portion 121-2 is cut and bent to both sides of the flat portion 121-2, respectively, and the It may be configured to allow fluid communication to spaces on both sides of the flat portion 121-2 through the cut portion of the flat portion 121-2.

In addition, the upper and lower ends of the turbulator 120-1-2 are spaced up and down so as to contact both side surfaces of the tube 110-2, protrude forward and rearward, and are spaced apart from each other. 2) and the second support portion 125-2 are formed, respectively.

And, the upper and lower ends of the turbulator (120-1-2) are spaced up and down so as to contact the front and rear surfaces of the tube (110-2), protruding forward and rearward, and a first support spaced vertically. Pieces 126a-2, 126b-2; 126-2 and second support pieces 127a-2, 127b-2; 127-2 are formed, respectively.

Dimples (111a-2, 111b-2; 111-2) are formed on the tube (110-2) as described above, and the first support portion (124-2) and the second support portion are formed on the turbulator (120-1-2). (125-2), by providing the first support piece (126-2) and the second support piece (127-2), it is possible to prevent deformation and breakage of the tube even in a high water pressure environment. Pressure: 10 kg/㎠ or more) and commercial (large-capacity) products.

<Fourth Example>

27 to 30, the tubular heat exchanger tube assembly 100-4 according to the fourth embodiment of the present invention has a difference in the configuration of the pressure support portion compared to the third embodiment, Other configurations may be configured in the same manner as in the third embodiment. Accordingly, the configuration and operation of the tube assembly 100-4 for a tubular heat exchanger according to the fourth embodiment of the present invention will be described, but the same components as in the third embodiment are given the same reference numerals, and Redundant descriptions will be omitted.

The tube assembly 100-4 for a tubular heat exchanger according to a fourth embodiment of the present invention includes a tube 110-2 having a flat shape to allow combustion gas to flow along the inside and heat exchange with a heat medium flowing outside, and , It is coupled to the inner side of the tube (110-2) is formed on the inside of the turbulator (120-2-2) and the tube (110-2) for inducing the generation of turbulence in the flow of the combustion gas, the It is configured to include a pressure support portion for supporting the external pressure acting on opposite sides of the tube (110-2).

The pressure support unit protrudes outwardly from both side surfaces of the turbulator 120-2-2 and abuts against the opposite inner surface of the tube 110-2 (129a-2, 129b-2; 129-2) Consists of

The support 129-2 includes a first support 129a-2 protruding forward from one side of the turbulator 120-2-2, and a rear from the other side of the turbulator 120-2-2. It consists of a second support (129b-2) protruding into. The first support 129a-2 and the second support 129b-2 are formed to be spaced apart on both sides, and are formed in a plurality at regular intervals along the longitudinal direction of the turbulator 120-2-2.

In this way, by bending a plurality of the first support (129a-2) and the second support (129b-2) toward the front and rear of the turbulator (120-2-2), the pressure support part without additional parts Since it can be implemented, it is possible to reduce the manufacturing cost of the tube assembly excellent in pressure resistance.

<Fifth Example>

31 to 34, the tube assembly 100-5 for a tubular heat exchanger according to the second embodiment of the present invention is a flat shape in which combustion gas flows along the inside and heat exchange with the heating medium flowing outside. It is configured to include a tube (110-3) made of, and a turbulator (150-3) coupled to the inner side of the tube (110-3) to induce generation of turbulence in the flow of the combustion gas.

The turbulator 150-3 divides the inner space of the tube 110-3 into both sides, and a flat portion 151-3 disposed in the longitudinal direction of the tube 110-3, and the flat portion ( It may be configured to include a first guide piece 152-3 and a second guide piece 153-3 formed on both side surfaces of 151-3 and which are alternately protruding obliquely and spaced along the length direction.

The first guide piece 152-3 is disposed inclined to one side on one side of the flat part 151-3, and the second guide piece 153-3 is It is arranged inclined to the other side on the side. Accordingly, the heat medium introduced into the first guide piece 152-3 and the second guide piece 153-3 is a second guide piece ( 153-3) and the first guide piece 152-3 in order to flow alternately in spaces on both sides of the flat portion 151-3.

The heat medium inlet end of the first guide piece 152-3 is connected to one end of the flat portion 151-3 by a first connecting piece 152a-3, and at the same time, one side of the flat portion 151-3 A first communication port (152b-3) is provided between the end and the first connecting piece (152a-3) and the first guide piece (152-3) through which fluid communication is made to the space on both sides of the flat portion (151-3).

The heat medium inlet end of the second guide piece 153-3 is connected to the other end of the flat portion 151-3 by a second connecting piece 153a-3, and at the same time, the other side of the flat portion 151-3 A second communication port (153b-3) is provided between the end and the second connecting piece (153a-3) and the second guide piece (153-3) through which fluid communication is made to the space on both sides of the flat portion (151-3).

In the first guide piece 152-3 and the second guide piece 153-3, a part of the flat portion 151-3 is cut and bent to both sides of the flat portion 151-3, respectively, and the It may be configured to allow fluid communication to the spaces on both sides of the flat portion 151-3 through the cut-out portion of the flat portion 151-3.

In addition, welding portions 154-3 and 155-3 protrude to both sides so as to contact the inner surface of the tube 110-3 on the flat portion 151-3, and the welding portions 154-3 and 155-3 and the tube 110 -3) can be configured by welding between the inner surfaces. Therefore, it is possible to reduce the area and location of the welded portion between the turbulator 150-3 and the tube 110-3.

According to the configuration of the turbulator 150-3, as shown by arrows in Fig. 32(b), the combustion gas is supplied to the first guide piece 152-3 and the second guide piece 153-3. Accordingly, the flow direction from the inner space of the tube 110-3 to one side and the other side is continuously changed to promote turbulent flow, so that the heat exchange efficiency between the combustion gas and the heat medium can be improved.

Meanwhile, while the combustion gas sequentially passes through the sensible heat heat exchange unit 1000a and the latent heat heat exchange unit 1000b shown in FIG. 10, the temperature of the combustion gas gradually decreases due to heat exchange with the heat medium. Accordingly, in the sensible heat heat exchange unit 1000a into which the combustion gas is introduced, the volume of the combustion gas is increased due to the high temperature, and the volume of the combustion gas is decreased in the latent heat heat exchange unit 1000b through which the combustion gas is discharged.

Accordingly, in order to improve the heat exchange efficiency, the flow resistance of the combustion gas is reduced by configuring a large flow path area of the combustion gas passing through the sensible heat heat exchange unit 1000a, and the flow resistance of the combustion gas is relatively reduced in the latent heat heat exchange unit 1000b. It is desirable to configure it as small as possible.

In this configuration, the turbulator 150-3 includes an upper portion 150a-3 of the turbulator provided in the sensible heat heat exchange unit on the inlet side of the combustion gas, and the latent heat heat exchange unit provided on the discharge side of the combustion gas. The lower portion 150b-3 of the turbulator is formed in an integrated structure, and the lower portion 150b-3 and the tube 110- of the turbulator are configured to correspond to changes in temperature and volume of the combustion gas passing through the tube 110-3. The area of the combustion gas flow path between the inner surfaces of 3) is smaller than the area of the combustion gas flow path between the upper portion 150a-3 of the turbulator and the inner surface of the tube 110-3. ) May have a larger area in contact with the combustion gas inside the tube 110-3 than in the upper portion 150a-3 of the turbulator.
Here, as a criterion for dividing the upper part 150a-3 of the turbulator and the lower part 150b-3 of the turbulator, the upper part 150a-3 of the turbulator is defined as an area where the sensible heat heat exchanger is located, The lower portion 150b-3 of the turbulator may be defined as a region where the latent heat heat exchanger is located. In addition, as a criterion for dividing the upper part 150a-3 of the turbulator and the lower part 150b-3 of the turbulator, the upper part 150a-3 of the turbulator is the total length of the turbulator 150-3 Among them, it is defined as an area corresponding to approximately two-thirds from the top of the turbulator 150-3 to the bottom, and the lower part 150b-3 of the turbulator is a turbulator among the total length of the turbulator 150-3. It can be defined as an area corresponding to approximately one-third from the bottom of (150-3) to the top.
The combustion gas flow path area between the lower portion 150b-3 of the turbulator and the inner surface of the tube 110-3 is between the lower portion 150b-3 of the turbulator and the inner surface of the tube 110-3. It refers to a space in which combustion gas flows, and the area of the combustion gas flow path between the upper part 150a-3 of the turbulator and the inner surface of the tube 110-3 is defined as the upper part 150a-3 of the turbulator and It is provided between the inner side of the tube 110-3 and refers to a space in which combustion gas flows.

In one embodiment, as shown in FIG. 32, the distance between the plurality of first guide pieces 152-3 and the second guide pieces 153-3 formed in the lower portion 150b-3 of the turbulator are vertically spaced apart. (L2) is more compact than the distance L1 in which the plurality of first guide pieces 152-3 and the second guide pieces 153-3 formed on the upper portion 150a-3 of the turbulator are spaced vertically. It can be configured to be placed at intervals.

In this case, the vertically spaced interval between the plurality of first guide pieces 152-3 and the second guide pieces 153-3 formed on the turbulator 150-3 is the flue gas at the inlet side of the combustion gas. It may be formed such that the spaced apart from the discharge side gradually narrows.

In another embodiment, as shown in FIG. 33, a plurality of protrusions 111-3 are formed on the inner surface of the tube 110-3 located on the discharge side of the combustion gas, It is possible to reduce the area of the flue gas flow path.

Referring to FIG. 34, support portions 142-3 (142a-3, 142b-3, 142c-3) for supporting the hydraulic pressure of the heat medium may be additionally provided inside the tube 110-3.

The support part 142-3 has a straight support 142a-3 having both ends fixed to the inner surface of the tube 110-3, as shown in FIG. 34(a), and FIGS. 34(b) and (c). As shown in ), both ends may be bent and configured as a support 142b-3 fixed to the inner surface of the tube 110-3.

In the case of the structure shown in (a) and (b) of Fig. 34, when the tube 110-3 is manufactured, one end of the support 142a-3, 142b-3 is on the base material on which the tube 110-3 is to be formed. After welding and processing the base material by rolling it into the shape of a tube (110-3), both ends of the base material and the other end of the supports (142a-3, 142b-3) are welded, respectively, and the supports (142a-3, 142b-3) The turbulators 150-3 are inserted into both sides of and are combined.

In the case of the structure shown in (c) of FIG. 34, when the tube 110-3 is manufactured, the support 142b-3 and the turbulator 150-3 are first combined, and the support 142b-3 and the turbulator The assembly of (150-3) may be press-fit into the inner side of the tube 110-3 to be coupled.

In another embodiment, the support part 142-3 is embossed 142c- formed protruding toward the inside of the tube 140 from the corresponding both sides of the tube 110-3, as shown in FIG. 34(d). It can be composed of 3). According to this configuration, when a high water pressure acts on the outside of the tube 110-3, the embosses 142c-3 formed at the corresponding positions come into contact, thereby preventing deformation of the tube 110-3.

As the support part 142-3 is coupled to the inner side of the tube 110-3, deformation of the tube 110-3 is prevented even when the water pressure of the heat medium acts on the outer surface of the tube 110-3. can do. Accordingly, the tube 110-3 coupled to the support 142-3 can be applied to a combustion apparatus for various purposes in addition to a boiler or a water heater.

<Sixth Example>

35 to 38, the tube assembly 100-6 for a tubular heat exchanger according to the sixth embodiment of the present invention is a flat shape that allows combustion gas to flow along the inside and heat exchange with a heat medium flowing outside. A tube (110-4) made of, and a turbulator (120-1-4) coupled to the inner side of the tube (110-4) to induce the generation of turbulence in the flow of the combustion gas, and the turbulator (120) It is coupled to -1-4) and is configured to include a supporter (130-1-4) for supporting the external pressure acting on the tube (110-4).

The configuration and assembly structure of the turbulator 120-1-4 and the supporter 130-1-4 constituting the tube assembly 100-6 according to the sixth embodiment of the present invention will be described.

38, a slit (132-1-4;132) having an upper end and an opening (132c-4) in the center of the body portion (131-4) of the supporter (130-1-4). -4) is formed, and the turbulator 120-1-4 is inserted in the longitudinal direction inside the slit 132-1-4 formed in the supporter 130-1-4 as shown in FIG. It consists of a structure in which the turbulator (120-1-4) and the supporter (130-1-4) are assembled.

The slit (132-1-4) has a first incision (132a-4) formed with a width that abuts on both sides of the turbulator (120-1-4), and is larger than the first incision (132a-4) The second cutouts 132b-4 formed in a width are connected vertically and consist of an alternately formed structure. Accordingly, both sides of the turbulator 120-1-4 are in close contact with and supported by the first incision 132a-4, and the second incision 132a-4 and the turbulator 120-1-4 The combustion gas may flow through the space provided therebetween.

In addition, a plurality of protrusions 133-4 protruding in a concave-convex shape so as to contact the inner surface of the tube 110-4 are spaced apart vertically at the outer end of the supporter 130-1-4. According to the configuration of the protrusion 133-4, the contact area between the supporter 130-1-4 and the tube 110-4 is limited to the area where the protrusion 133-4 is formed, so that the contact area can be reduced. do. Accordingly, when the contact area between the supporter and the tube is large, it is possible to prevent the occurrence of crevice corrosion that may be caused by stagnation of the heat medium due to the surface tension, thereby improving the durability of the tube assembly.

The turbulator (120-1-4) divides the inner space of the tube (110-4) into both sides and is disposed in the longitudinal direction of the tube (110-4) and a flat portion (121-4), the plane It may be configured to include a first guide piece 122-4 and a second guide piece 123-4 formed to protrude alternately inclinedly spaced apart along the longitudinal direction on both sides of the portion 121-4.

The first guide piece 122-4 is disposed inclined to one side on one side of the flat portion 121-4, and the second guide piece 123-4 is It is arranged inclined to the other side on the side. Therefore, the heat medium introduced into the first guide piece 122-4 and the second guide piece 123-4 is a second guide piece disposed adjacent to the opposite side of the flat portion 121-4 ( 123-4) and the first guide piece 122-4 in order to flow alternately in spaces on both sides of the flat portion 121-4.

The heat medium inlet end of the first guide piece 122-4 is connected to one end of the flat portion 121-4 by a first connecting piece 122a-4, and at the same time, one side of the flat portion 121-4 Between the end and the first connecting piece (122a-4) and the first guide piece (122-4), a first communication port (122b-4) through which fluid communication through the space on both sides of the flat portion (121-4) is provided.

The heat medium inlet end of the second guide piece 123-4 is connected to the other end of the flat portion 121-4 by a second connection piece 123a-4, and at the same time, the other side of the flat portion 121-4 Between the end and the second connecting piece (123a-4) and the second guide piece (123-4), a second communication port (123b-4) through which fluid communication through the space on both sides of the flat portion (121-4) is provided.

In the first guide piece 122-4 and the second guide piece 123-4, a part of the flat portion 121-4 is cut and bent to both sides of the flat portion 121-4, respectively, and the It may be configured to allow fluid communication to the spaces on both sides of the flat portion 121-4 through the cut portion of the flat portion 121-4.

In addition, the upper and lower ends of the turbulator 120-1-4 are spaced up and down so as to contact both sides of the tube 110-4, protrude forward and rearward, and are spaced apart from each other. 4) and the second support portion 125-4 are formed, respectively.

In addition, a pair of first support pieces (126-4) and a second support piece (127) protruding to support both sides of the supporter (130-1-4) on both sides of the turbulator (120-1-4). -4) is spaced up and down and is provided in plural.

Therefore, when the turbulator (120-1-4) is inserted into the slit (132-1-4) of the supporter (130-1-4) in the longitudinal direction, the supporter (130-1-4) is the first support Since it is supported by the piece 126-4 and the second support piece 127-4, the positions of the turbulator 120-1-4 and the supporter 130-1-4 can be fixed.

According to such a configuration of the turbulator 120-1-4, the combustion gas is transmitted in the inner space of the tube 110-4 by the first guide piece 122-4 and the second guide piece 123-4. Since the flow direction to one side and the other side continuously changes to promote turbulent flow, the heat exchange efficiency between the combustion gas and the heating medium can be improved.

<Seventh Example>

39 to 41, the tube assembly 100-7 for a tubular heat exchanger according to the seventh embodiment of the present invention is a flat shape that allows combustion gas to flow along the inside and heat exchange with a heat medium flowing outside. A tube (110-4) made of, and a turbulator (120-2-4) coupled to the inner side of the tube (110-4) to induce generation of turbulence in the flow of the combustion gas, and the turbulator (120) It is coupled to -2-4) and is configured to include a supporter (130-2-4) for supporting the external pressure acting on the tube (110-4).

Hereinafter, the configuration and assembly structure of the turbulator 120-2-4 and the supporter 130-2-4 constituting the tube assembly 100-7 for a tubular heat exchanger according to the seventh embodiment of the present invention will be described. However, the same reference numerals are assigned to the same components as in the sixth embodiment, and redundant descriptions thereof will be omitted.

In this embodiment, as shown in Figure 41, the body portion (131-4)) of the supporter (130-2-4) is formed with a slit (132-2-4) in the shape of which the upper and lower ends are blocked, and , As shown in Figure 40, the turbulator (120-2-4) and the supporter (130-2-4)), the turbulator (120-2-4)) is a supporter (130-2-4) ) Is inserted into the inside of the slit (132-2-4)) formed in a unidirectional direction to be assembled.

The slit (132-2-4)), a first incision (132d-4) formed with a width contacting both sides of the turbulator (120-2-4), and the first incision (132d-) The second incisions 132e-4) formed with a width greater than 4)) are connected up and down and have a structure formed alternately.

Accordingly, both sides of the turbulator 120-2-4) are in close contact with and supported by the first incision 132d-4, and the second incision 132e-4) and the turbulator 120-2 The combustion gas can flow through the space provided between -4)).

The upper and lower ends of the turbulator 120-2-4 according to the present embodiment are protruding to support both sides of the supporter 130-2-4) and the locking protrusion 128b- 4)) is formed.

The locking piece (128-4) is formed by cutting a part of the flat portion (121-4)) and bending it vertically, the locking protrusion (128b-4)) of the supporter (130-2-4) It may be provided in an embossed form at a position spaced apart from one side of the locking piece 128a-4 by an interval corresponding to the thickness. Therefore, when the turbulator (120-2-4)) is inserted in one direction inside the slit (132-2-4)) formed in the supporter (130-2-4), the locking protrusion (128b-4)) Passes through the through portion (132f-4)) formed in the form of a locking protrusion (128b-4)) in the slit (132-2-4), and at this time, the locking piece (128a-4)) is a supporter (130- 2-4)) of the body (131-4)), so the supporter (130-2-4)) is supported by the locking piece (128a-4)) and the locking protrusion (128b-4)) As a result, the positions of the turbulator (120-2-4)) and the supporter (130-2-4)) can be fixed.

<Eighth Example>

42 to 44, the tube assembly 100-8 for a tubular heat exchanger according to an eighth embodiment of the present invention is a flat shape that allows combustion gas to flow along the inside and heat exchange with a heat medium flowing outside. A tube (110-4) made of, and a turbulator (120-3-4) coupled to the inner side of the tube (110-4) to induce the generation of turbulence in the flow of the combustion gas, and the turbulator (120) -3-4) and configured to include a supporter (130-3-4) for supporting external pressure acting on the tube (110-4).

Hereinafter, the configuration and assembly structure of the turbulator 120-3-4 and the supporter 130-3-4 constituting the tube assembly 100-3 for a tubular heat exchanger according to the eighth embodiment of the present invention will be described. However, the same reference numerals are assigned to the same components as those of the sixth and seventh embodiments, and redundant descriptions thereof will be omitted.

In this embodiment, as shown in FIG. 44, a plurality of slits 129-4 spaced up and down are formed in the flat portion 121-4 of the turbulator 120-3-4, and shown in FIG. 43 As described above, in the turbulator 120-3-4 and the supporter 130-3-4, a portion of the supporter 130-3-4 is formed in the turbulator 120-3-4 ( 129-4) is inserted in the vertical direction and assembled.

The turbulator 120-3-4 has a clogging portion 129a-4 formed between the adjacent slits 129-4, and the clogging portion in the supporter 130-3-4 A plurality of support grooves 135-4 that are caught in the (129a-4) are formed.

In addition, the outer end of the supporter (130-3-4) is provided with a plurality of protrusions (134-4) formed to protrude to contact the inner surface of the tube (110-4) vertically spaced apart, the tube (110-4) By reducing the contact area between) and the supporter (130-3-4), crevice corrosion can be prevented.

As described above, the present invention is not limited to the above-described embodiments, and modifications are apparent by those of ordinary skill in the art without departing from the technical spirit of the present invention claimed in the claims. It is possible, and such modifications are within the scope of the present invention.

1000: tubular heat exchanger 1000a: sensible heat heat exchanger
1000b: latent heat heat exchange unit 1100: outer jacket
1110: heat medium inlet 1120: heat medium outlet
1200: combustion chamber 1300: upper tube sheet
1600: upper diaphragm 1700: middle diaphragm
1800: lower diaphragm 1900: lower tube sheet
100: tube assembly 110: tube
120: turbulator 120-1: upper turbulator
130-1: lower turbulator 122-1,125-1: pressure support
123-1: guide unit 130-1-1~130-1-4: supporter

Claims (28)

A tube having a flat shape for allowing the combustion gas generated in the combustion chamber to flow along the inside and heat exchange with the heat medium flowing outside;
Including; a turbulator coupled to the inner side of the tube to induce the generation of turbulence in the flow of the combustion gas,
The turbulator is composed of an upper portion of a turbulator provided in a sensible heat heat exchange unit on an inlet side of the combustion gas and a lower portion of a turbulator provided in a latent heat heat exchange unit on the discharge side of the combustion gas,
The combustion gas flow path area between the lower part of the turbulator and the inner surface of the tube to correspond to the temperature and volume change of the combustion gas passing through the tube is a combustion gas flow path between the upper part of the turbulator and the inner surface of the tube Tube assembly for a tubular heat exchanger, characterized in that formed smaller than the area. The method of claim 1,
The turbulator,
An upper turbulator that is coupled to an upper inner side of the tube close to the combustion chamber so as to be in surface contact with the tube to increase thermal conductivity and to induce turbulence in the flow of the combustion gas; And
A lower turbulator coupled to the inner side of the tube toward the lower side of the upper turbulator to induce turbulence in the flow of the combustion gas;
Tube assembly for a tubular heat exchanger consisting of. The method of claim 2,
The upper turbulator,
A first portion having a shape corresponding to one side of the tube and including a first tube contacting surface in surface contact with the inner side of the one side of the tube, and a shape corresponding to the other side of the tube. Tube assembly for a tubular heat exchanger, characterized in that consisting of a second portion including a second tube contact surface in surface contact with the inner surface of the side portion. The method of claim 3,
A tube assembly for a tubular heat exchanger, characterized in that the first part and the second part of the upper turbulator are processed by bending one base plate based on a center line of the base plate. The method of claim 3,
In the upper turbulator,
A first pressure support part for supporting the other side of the tube by cutting a part of the first tube contact surface and bending the outer end to be positioned on the same line as the outer surface of the second tube contact surface,
A tube assembly for a tubular heat exchanger, characterized in that a second pressure support part is formed by cutting a part of the second tube contact surface and bent so as to be positioned in line with the outer surface of the first tube contact surface to support one side of the tube. The method of claim 3,
In the upper turbulator,
A first guide portion bent toward the inner space of the tube by cutting a part of the first tube contact surface,
A portion of the second tube contact surface is cut to form a second guide portion bent toward the inner space of the tube,
The tube assembly for a tubular heat exchanger, characterized in that the first guide part and the second guide part are vertically spaced apart and alternately formed to induce a change in the flow direction of the combustion gas. The method of claim 3,
In the upper turbulator,
Some of the first incisions cut from the first tube contact surface are bent to protrude toward the second tube contact surface, and some of the second incisions cut from the second tube contact surface are bent. A second pressure support portion protruding toward the first tube contact surface is formed,
The protruding end of the first pressure support part is in contact with the second tube contact surface, and the protruding end of the second pressure support part passes through the first incision and contacts the inner surface of the tube. Tube assembly for heat exchanger. The method of claim 7,
The first pressure support part and the second pressure support part are provided in plurality by being spaced apart in the front-rear direction and the vertical direction,
The first pressure support part located on the upper side and the first pressure support part located on the lower side are provided at positions that do not overlap in the vertical direction,
A tube assembly for a tubular heat exchanger, characterized in that the second pressure support portion positioned at the upper side and the second pressure support portion positioned at the lower side are provided at positions that do not overlap in the vertical direction. The method of claim 7,
The tube assembly for a tubular heat exchanger, wherein the first pressure support part and the second pressure support part have a plate shape, and both side surfaces having a large area are arranged in parallel with the flow direction of the combustion gas. The method of claim 1,
In the turbulator, the inner space of the tube is divided into both sides, and a flat portion disposed in the longitudinal direction of the tube, a plurality of first guide pieces formed to protrude alternately inclinedly spaced apart along the longitudinal direction on both sides of the flat portion; Tube assembly for a tubular heat exchanger comprising a second guide piece. The method of claim 10,
The first guide piece is disposed inclined to one side on one side of the flat portion,
The second guide piece is disposed inclined to the other side on the other side of the flat portion,
The heat medium flowing into the first guide piece and the second guide piece is sequentially transferred to the second guide piece and the first guide piece disposed adjacent to opposite sides of the flat portion, respectively, and alternately flows through spaces on both sides of the flat portion. Tube assembly for a tubular heat exchanger, characterized in that. The method of claim 11,
The heat medium inlet end of the first guide piece is connected to one end of the flat portion by a first connecting piece, and fluid communication is made between one end of the flat portion and the first connecting piece and the first guide piece in both spaces of the flat portion. Communication channels are established,
The heat medium inlet end of the second guide piece is connected to the other end of the flat portion by a second connecting piece, and fluid communication is made between the other side end of the flat portion and the second connecting piece and the second guide piece into spaces on both sides of the flat portion. Tube assembly for a tubular heat exchanger, characterized in that the communication port is provided. The method of claim 11,
The first guide piece and the second guide piece are partially cut off the flat portion and bent to both sides of the flat portion, respectively,
A tube assembly for a tubular heat exchanger, characterized in that fluid communication is made to spaces on both sides of the flat portion through the cutout portions of the first guide piece and the second guide piece. The method of claim 10,
The distance between the plurality of first guide pieces and the second guide pieces formed in the lower part of the turbulator is vertically spaced apart from the distance between the plurality of first guide pieces and the second guide pieces formed in the upper part of the turbulator. Tube assembly for a tubular heat exchanger, characterized in that arranged at tighter intervals. delete The method of claim 1,
The tubular heat exchanger tube assembly, characterized in that the lower portion of the turbulator has a larger area in contact with the combustion gas inside the tube than the upper portion of the turbulator. The method of claim 1,
Tube assembly for a tubular heat exchanger, characterized in that a plurality of protrusions are formed on an inner surface of the tube positioned on the discharge side of the combustion gas. The method of claim 2,
Tube assembly for a tubular heat exchanger, characterized in that the upper and lower ends of the lower turbulator are spaced up and down so as to contact both side surfaces of the tube, protruding forward and rearward, and supporting portions spaced apart from each other. The method of claim 2,
The tube assembly for a tubular heat exchanger, characterized in that the upper and lower ends of the lower turbulator are spaced up and down so as to contact the front and rear surfaces of the tube, protrude forward and rearward, and support pieces positioned vertically spaced apart from each other. The method of claim 1,
The tube assembly for a tubular heat exchanger, which is formed inside the tube, further comprising a pressure support portion for supporting an external pressure acting on opposite sides of the tube. The method of claim 20,
The pressure support part,
Tube assembly for a tubular heat exchanger, characterized in that the tubular heat exchanger consists of a support member protruding outwardly from each side of the turbulator and in contact with the opposite inner surface of the tube. The method of claim 21,
The support is a tubular heat exchanger tube assembly, characterized in that a part of the surface of the turbulator is cut and bent to both sides. The method of claim 1,
A tube assembly for a tubular heat exchanger that is coupled to the turbulator and further comprises a supporter for supporting an external pressure acting on the tube. An outer jacket through which the heating medium is introduced and discharged;
A combustion chamber coupled to the inside of the outer jacket so that a flow path of the heat medium is formed between the outer jacket and combustion of the burner; And
The tube assembly for a tubular heat exchanger according to any one of claims 1 to 14 and 16 to 23;
Tubular heat exchanger comprising a. The method of claim 24,
The tubular heat exchanger, characterized in that the tube is provided in plural and is vertically installed so that the combustion gas generated in the combustion chamber flows downward, spaced apart in a circumferential direction, and arranged radially. The method of claim 24,
Inside the outer jacket, a multi-stage diaphragm for guiding the flow of the heating medium is provided vertically and spaced apart so that the flow direction of the heating medium is alternately switched radially inward and outward, and the tube is provided in plural and the multi-stage diaphragm Tubular heat exchanger, characterized in that inserted into and supported. The method of claim 26,
The multi-stage diaphragm is made of a plate-shaped upper diaphragm, an intermediate diaphragm, and a lower diaphragm,
The upper diaphragm and the lower diaphragm have an opening formed in the center portion for the flow of the heat medium, and the edge portion is provided to contact the inner surface of the outer jacket,
The middle portion diaphragm is formed in a shape of a central portion is blocked, and the edge portion is spaced apart from the inner surface of the outer jacket, characterized in that provided so that the heat medium flows therebetween. The method of claim 26,
An upper tube sheet into which upper ends of the plurality of tubes are inserted is coupled to a lower end of the combustion chamber,
A tubular heat exchanger, characterized in that a lower tube sheet into which lower ends of the plurality of tubes are inserted is coupled to a lower end of the outer jacket.

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