KR101532023B1 - Heat exchanger for condensing boiler - Google Patents

Abstract

The present invention is to provide a heat exchanger for a condensing boiler capable of improving heat efficiency with a simple structure and being compatibly used according to the size of a heat exchange pipe by expanding or narrowing the size of a casing corresponding to the size of the heat exchanger pipe. The present invention comprises: a heat exchange pipe (10) cylindrically formed by laminating loop-type sleeves (12) in multiple layers while the inside of the sleeves (12) is connected to an inlet and an outlet; a casing (20) having a rear cover (22) and a front cover (26) to form a space part in which the heat exchange pipe (10) is embedded; a burner (30) coupled to the casing (20) to be arranged in the internal space part of the heat exchange pipe (10); and a support unit (40) to support the rear cover (22) and the front cover (26) of the casing (20) to be coupled. The casing (20) has a chamber cover (24) interposed between the rear cover (22) and the front cover (26). The support unit (40) comprises: a rear support panel (42) attached to the rear cover (22); a plurality of support bolts (44) simultaneously coupled to the rear support panel (42) and the front cover (26); and support nuts (46) coupled to the support bolts (44).

Description

[0001] Heat exchanger for condensing boiler [0002]

The present invention relates to a heat exchanger for a condensing boiler, and more particularly, to a heat exchanger having a simplified structure to improve the structure of thermal efficiency and to increase or decrease the size of a casing corresponding to the size of a heat exchange pipe, To a heat exchanger for a new conten- ting boiler that can be used in a compatible manner in accordance with the present invention.

Generally, gas boilers distributed in the market are divided into two types, namely, a general type boiler and a condensing boiler. The condensing boiler is disclosed in, for example, U.S. Utility Model Registration No. 20-0280095 (registered on Jun. 17, 2002) A latent heat exchanging pipe disposed in the latent heat exchanging space and preheated by the sensible heat exchanging space and the latent heat exchanging space, the latent heat exchanging pipe being disposed in the latent heat exchanging space, And a sensible heat exchange pipe disposed in the space and directly heated by the burner to recover the latent heat of condensation of steam contained in the exhaust gas of the boiler to increase the heat efficiency.

As an example of the heat exchanger structure of another condensing boiler, in the heat exchanger structure of the condensing boiler disclosed in Patent Registration No. 10-0813807 (Mar. 07, 2008), the structure of the heat exchange pipe formed inside the heat exchanger is oriented toward the center of the burner portion So that it is possible to improve the thermal efficiency and promote the drainage of the condensed water by uniform thermal distribution.

However, it is necessary to continuously improve the thermal efficiency in order to reduce the consumption of fossil fuels such as gas used in the boiler, and to reduce the carbon dioxide emissions. In addition, with the improvement of the supporting structure of the casing accommodating the heat exchange pipe, the height of the casing can be increased or decreased corresponding to the height of the heat exchange pipe constructed by winding the pipe having the oval shape in cross section a plurality of times in a spiral manner, Structural improvement is required for compatibility.

Utility model registration No. 20-0280095 (registered on June 17, 2002) Patent Registration No. 10-0813807 (Registered on Mar. 07, 2008) Patent Registration No. 10-1321708 (Registered on Oct. 18, 2013)

The main object of the present invention is to provide a heat exchange pipe that can be used in a compatible manner according to the specification of the heat exchange pipe by improving the structure of the heat efficiency by the simplified structure and by increasing or decreasing the size of the casing corresponding to the size of the heat exchange pipe And to provide a heat exchanger for a conten- sing boiler.

According to the present invention, there is provided a heat exchanger comprising: a heat exchange pipe configured to have a plurality of single-sided cross-sectionally elongated sleeves stacked in a plurality of layers to form a tubular shape, the inside of the sleeve being communicated with an inlet port and an outlet port; A casing having a rear cover and a front cover to form a space in which the heat exchange pipe is installed; A burner coupled to the casing to be disposed in an inner space portion of the heat exchange pipe; And a support unit for supporting the rear cover of the casing and the front cover to be coupled to each other.

Wherein the sleeve is provided with a space projection to secure a spaced space between the sleeve and another sleeve disposed below the space, the space projection having a circumferential groove formed on at least one surface of the opposing surfaces of the sleeves arranged to face up and down, A first space projection of the mold; And a second space projection having a shape different from that of the first space projection.

Preferably, the sleeve of the heat exchange pipe has a cross-sectional oval shape having a greater distance between the inside and outside than the height between the upper and lower surfaces, and the distance between the outside end of the sleeve and the inner circumferential surface of the casing is in the range of 3 to 30 mm.

Wherein the casing comprises a chamber cover interposed between the rear cover and the front cover, the support unit comprising: a rear support panel which is in close contact with the rear cover; A plurality of support bolts simultaneously coupled to the rear support panel and the front cover; And a support nut fastened to the support bolt.

The outlet port forming unit is provided with an outlet port communicated with the space formed by the casing. The outlet port forming unit includes the outlet port, the outlet port forming unit, And a pass hole is provided to be disposed between the first electrode and the second electrode.

The path hole includes a plurality of bridge pieces connected to both ends of the outlet port forming section, and the path hole is divided into a plurality of pass sector holes 125AH by the bridge piece.

Wherein the pass hole is disposed eccentrically to one side of the center of the outlet port forming portion (disposed at a position eccentrically eccentric to one side of the space portion formed by the casing), and the center portion of the outlet port is located at a position And is disposed at an offset position.

The outlet port is disposed at a position deviated from the position of the pass hole, and is disposed coaxially with the central portion of the outlet port forming portion, or disposed at a position eccentric to one side of the center portion of the outlet port forming portion.

The front cover 26 is provided with a bolt coupling boss, and the support bolt is inserted into the bolt coupling boss to fasten the support nut.

Wherein both end portions of the chamber cover are coupled to and joined to the rear cover and the coupling groove of the front cover, respectively, and at both ends of the chamber cover, Is provided.

In the present invention, each of the sleeves constituting the heat exchange pipe is provided with a space projection so as to secure a space spaced apart from other sleeves disposed at the lower portion thereof, and space projections are brought into contact with the facing surfaces of the vertically stacked sleeves , The upper and lower sleeves are kept spaced from each other on the surface of the upper and lower sleeves (i.e., the lower surface of the upper sleeve and the upper surface of the lower sleeve), and the gap between the facing surfaces of the upper and lower sleeves is also maintained. And the function of improving the heat conduction efficiency are sufficiently exhibited, but the gap maintaining structure between such sleeves can be implemented as simple as possible.

In the present invention, by further increasing the outer diameter of the heat exchange pipe, the height of the heat exchange pipe is further reduced, and the heat exchange efficiency can be sufficiently achieved. That is, the present invention is characterized in that the number of rotation wheels of the sleeve of the heat exchange pipe is not increased so that the height of the heat exchange pipe does not need to be increased, and the heat exchange capacity can be satisfied satisfactorily.

In addition, in the present invention, the casing incorporating the heat exchange pipe has a structure in which the rear cover, the chamber cover and the front cover are assembled, and the assembled state of the rear cover, the chamber cover and the front cover of the casing is firmly held by the support bolt and the support nut So that the built-in portion of the heat exchange pipe has a simple and robust support structure in the supporting structure of the casing.

1 is an exploded perspective view of a heat exchanger for a condensing boiler according to the present invention;
Figure 2 is a perspective view showing the sleeve of the heat exchange pipe shown in Figure 1;
3 is an external perspective view of a heat exchanger for a condensing boiler according to the present invention.
Fig. 4 is a perspective view showing the rear surface of Fig.
5 is a bottom perspective view of Fig.
Fig. 6 is a perspective view of the rear cover,
Fig. 7 is a perspective view showing the rear surface of the rear cover of Fig. 6 except for the outlet port forming plate; Fig.
Fig. 8 is a plan view
9 is a rear view of Fig. 7
10 is a longitudinal sectional view along the line A in Fig. 3
11 is a longitudinal sectional view along the line B in Fig. 3
12 is a side sectional view of Fig. 3
13 is a perspective view of a heat exchanger for a condensing boiler according to another embodiment of the present invention.
14 is a perspective view showing the rear surface of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; coupled "or" connected "

It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The present invention should not be construed as limited to the embodiments described in Figs.

Referring to the drawings, a heat exchanger for a condensing boiler according to the present invention includes a heat exchange pipe 10 (see FIG. 1) having a tubular shape in which a plurality of looped sleeves 12 are stacked and the inside of the sleeve 12 is connected to an inlet and an outlet . In the present invention, a sleeve (12) (heat transfer tube) having a hollow space formed by a circular cross section (oval cross section) is spirally wound around a heat exchange pipe (10) having a structure in which a plurality of sleeves The heat exchange pipe 10 is formed in a cylindrical shape having a space portion at an inner end thereof. The heat exchange pipe 10 is formed in a cylindrical shape having an inlet port and an outlet port on the uppermost sleeve 12 and the lowermost sleeve 12, respectively. That is, the heat exchange pipe 10 is configured such that a plurality of layers of sleeves 12 spirally extend so as to communicate with the inner space portion, and the inner space portion of the sleeves 12 is heated by the heat exchange fluid (for example, And the outlet port through which the fluid to be heat-exchanged flows.

The first space protrusion 14a and the second space protrusion 14b are provided so as to protrude from any one of surfaces facing each other between the vertically stacked sleeves 12 of the heat exchange pipe 10. The first space projection 14a and the second space projection 14b protrude downward from the bottom surface of the upper sleeve 12 among the plurality of sleeves 12 stacked up and down in the heat exchange pipe 10. [ That is, a plurality of first space protrusions 14a are formed along the circumferential direction on the bottom surface of the upper sleeve 12, and a second space protrusion 14b is provided at a position deviated from each first space protrusion 14a And the upper and lower sleeves 12, the flow path space for releasing heat from the inner end to the outer end is ensured. At this time, the first space projection 14a has a columnar space projection shape and the second space projection 14b has a shape different from that of the first space projection 14a. The second space projection 14b has a rectangular circular projection shape extending radially outward with respect to the center of the sleeve 12.

As a result, the first space protrusions 14a and the second space protrusions 14b maintain a gap between facing surfaces of two adjacent upper and lower sleeves 12, respectively. The first space projection 14a and the second space projection 14b are formed on the bottom surface of the upper sleeve 12 in the upper and lower facing sleeves 12 so that the first space projection 14a and the second space projection 14b 14b are brought into contact with the upper surface of the lower sleeve 12 to maintain a space between the two vertically adjacent sleeves 12. The first space projection 14a and the second space projection 14b may be formed on the upper surface and the lower surface of the sleeve 12, respectively.

Therefore, the combustion gas flows from the inner end space portion of the heat exchange pipe 10 to the outer end of the heat exchange pipe 10. That is, the combustion gas escapes to the outer end of the inner end of the heat exchange pipe 10 through the distribution space secured between the sleeves 12 of the heat exchange pipe 10.

The first space protrusion 14a has an arcuate space projection structure extending a predetermined length along the circumferential direction of the sleeve 12 and is provided between the first space protrusion 14a and the second space protrusion 14b. Preferably, the outer surface shapes of the first space projection 14a and the second space projection 14b are curved so that the combustion gas smoothly rides over and the load resistance is reduced. It is more preferable that the combustion gas can flow more smoothly to the inner and outer ends of the heat exchange pipe 10 when the sectional shapes of the first space projection 14a and the second space projection 14b are provided with arcuate portions.

The heat exchange pipe 10 is installed in the casing 20 to secure a combustion space at a position inside the inner circumferential surface of the heat exchange pipe 10 and to be spaced apart from the inner circumferential surface of the casing 20 by a predetermined distance Is formed. At this time, the casing 20 has a structure in which the chamber cover 24 is interposed between the rear cover 22 and the front cover 26.

The rear cover 22 is in the form of a case having a space portion communicated in the upper portion thereof. In the present invention, the rear cover 22 has a circular case shape with an open top. In addition, the rear cover 22 has a supporting protrusion 121 connected between the inner circumferential surface and the bottom. Further, a support piece 123 is provided at the bottom of the rear cover 22. At this time, the support piece 123 includes a plate-like middle support piece 123a having a bottom portion connected to the bottom of the rear cover 22, and an outer side surface of the middle support piece 123a and a bottom portion of the rear cover 22 And an inner support piece 123c integrally connected to an inner surface of the middle support piece 123a and a bottom of the rear cover 22. The inner support piece 123c is integrally connected to the inner support piece 123a. A plurality of support pieces 123 are provided in the radial direction with respect to the center of the bottom of the rear cover 22. [ The upper end of the rear cover 22 faces the lower end of the front cover 26 to be described later and the coupling groove 22G is provided at the upper end of the rear cover 22. [ The rear cover 22 has a case shape in which the lower end portion of the outer covering body is circularly connected to the bottom portion so as to open the upper portion of the outer cover covering body. The inner covering body is provided at a further inner position than the inner peripheral surface of the outer covering body, And the engaging groove 22G is formed between the covering body and the outer covering body. The engaging groove 22G is a circular groove structure. The lower end of the inner covering body is integrally connected to the upper surface of the supporting jaw 121. On the other hand, at the upper end of the inner covering body, a plurality of packing supporting pieces PS are provided in the radial direction with respect to the center of the bottom of the rear cover 22. [ And the packing supporting piece PS protrudes above the upper end of the inner covering body. In addition, an auxiliary rib connected to the packing supporting piece PS and inner peripheral surfaces of the inner covering body is provided. The outer cover member of the rear cover 22 is provided with an air inlet port and the air inlet port is provided with a sleeve connection port 22SC. The air inlet port and the sleeve connection port 22SC are provided on the first side portion, assuming that one side is the first side portion and the other side is the second side portion with respect to the imaginary center line when viewed from the upper surface of the rear cover 22. [

And an outlet port forming unit 122 for discharging the combustion gas is provided on the side surface of the rear cover 22. The outlet port forming section 122 includes a connection outlet port forming plate 122A, a cross outlet port forming plate 122B, and an outlet port forming plate 122C.

The connection outlet port forming plate 122A is formed in a plate shape having a first flow path 125A communicated with an inner space portion of the rear cover 22 therein. The inner end of the connecting port port forming plate 122A is connected to the rear cover 22. [ And the inner end of the connection port port forming plate 122A is connected to the outer circumferential surface of the outer covering member of the rear cover 22. [ A bridge piece 125BP dividing the first flow path 125A into a plurality of pass sector holes 125AH is provided in the connection outlet port forming plate 122A. The upper and lower ends of the bridge piece 125BP are connected to the upper and lower ends of the connection outlet port 124 so that a pass sector hole 125AH is disposed between the respective bridge pieces 125BP. The rear cover 22 is disposed at a position facing the front cover 26 and the chamber cover 24 is interposed between the rear cover 22 and the front cover 26 to form the casing 20, The flow path 125A is provided in the rear cover 22 and the first flow path 125A is disposed at a position eccentrically located at one side from the center line between the upper and lower ends of the casing 20. [ That is, the first flow path 125A is provided at a position eccentrically from the center line between the upper and lower ends of the rear cover 22 to the lower end.

The cross-outlet port-forming plate 122B has a structure integrally connected to an outer end of the connection-outlet port-forming plate 122A. At this time, the cross-outlet forming plate 122B has a plate structure extending in a direction substantially orthogonal to the connecting-outlet-port-forming plate 122A. And a cross-outlet port forming plate 122B is disposed so as to face the outer peripheral surface of the rear cover 22 in parallel.

The outlet port forming plate 122C is abutted against the cross outlet port forming plate 122B. The outlet port forming plate 122C is fixed to the outlet port forming plate 122C by a known fixing means such as bolt or welding or adhesive in the state in which the inside surface of the outlet port forming plate 122C is in contact with the flange portion extending in the peripheral portion of the cross outlet port forming plate 122B. Can be joined to the cross-outlet port forming plate 122B. At this time, a second flow path 125B communicating with the first flow path 125A of the connection outlet port forming plate 122A is formed between the outlet port forming plate 122C and the cross outlet port forming plate 122B . As a result, the first flow path 125A extends laterally from the inner space portion of the rear cover 22 and the second flow path 125B extends in a direction perpendicular to the inner space portion of the rear cover 22, The flow path of the cover 22 is roughly made up of the tour operator circulation route.

The outlet port forming plate 122C is provided with an outlet port 124. The outlet port forming plate 122C is coupled to the outlet port forming plate 122B and the outlet port 124 is provided to the outlet port forming plate 122C. Therefore, the outlet port forming portion 122 of the rear cover 22 is provided with the outlet port 124. [ The outlet port 124 is in communication with the flow path 125 which communicates with the inner space portion of the solenoid cover 22 communicating with the inner and outer sides of the outlet port forming portion 122. Accordingly, the combustion gas introduced into the space inside the rear cover 22 is discharged to the outlet port 124 through the flow path 125.

The lower end of the chamber cover 24 is coupled to the upper end of the rear cover 22. The chamber cover 24 has a circular cover structure with upper and lower ends opened. The chamber cover 24 is engaged with the coupling groove 22G provided at the upper end of the rear cover 22. At this time, curled portions 24CU are provided at the upper and lower ends of the chamber cover 24, respectively, and the curling portions 24CU surround the packing P. The packing P has a structure in which the inner joint space portion communicates with the base end portion, and the engagement space portion of the packing P is fitted into the upper end portion and the lower end portion of the chamber cover 24 through the opening portion of the base end portion. The curling portion 24CU at the lower end of the chamber cover 24 and the packing P are fitted into the engaging groove 22G at the upper end of the rear cover 22. [

The front cover 26 has a case structure having a space portion communicated in the upper and lower ends thereof. A burner cover engaging hole 226BH is provided in the upper cover piece of the front cover 26. [ The burner cover engaging hole 226BH is in the shape of a circular hole. Around the burner cover engaging hole 226BH, an upwardly extending piece protruding upward from the upper surface of the upper cover piece is provided. The upper cover piece of the front cover 26 is provided with a lower stepped portion, and the burner cover engaging boss 226CB is provided on the upper surface of the stepped portion. The burner cover engaging boss 226CB is provided with a bolt coupling hole in the form of a screw hole. The burner cover engaging bosses 226CB are arranged in a plurality of radial directions with respect to the central portion of the front cover 26. [ The front cover 26 is provided with a sleeve connection port 26SC. When viewed from the upper surface of the front cover 26, one side is referred to as a first side portion and the other side is referred to as a second side portion, the sleeve connection port 26SC is provided on the first side portion of the front cover 26 do. A space protrusion is provided on the inner surface of the upper cover member. The space projection has a circular space projection shape, and at least two such space projections are provided concentrically. The upper cover piece is provided with a heat exchange pipe support jaw whose height is lower than the inner ceiling surface. The height of the lower end of the space projection is the same as the height of the heat exchange pipe support jaw.

A bolt fastening boss 26BS is provided on the outer circumferential surface of the front cover 26. The bolt fastening boss 26BS is provided with a bolt fastening hole communicating with the upper and lower ends thereof. These bolt fastening bosses 26BS are arranged in a plurality of radial directions with respect to the center of the front cover 26. [

A lower end of the front cover 26 faces an upper end of the rear cover 22 and a coupling groove 26G is provided at a lower end of the front cover 26. The front cover 26 has a case shape in which a lower end portion of an outer cover ring piece having a circular cross section is integrally connected to a bottom portion and has an upper portion and a lower portion opened. An inner covering body is provided at a further inner position than the inner peripheral surface of the outer covering body , And the engaging groove 26G is formed between the inner covering body and the outer covering body. The engaging groove 26G is a circular groove structure. On the other hand, at the upper end of the inner covering body, a plurality of packing supporting pieces PS are provided in the radial direction with respect to the center of the front cover 26. And the packing supporting piece PS protrudes further downward than the lower end portion of the inner covering body. In addition, an auxiliary rib connected to the packing supporting piece PS and inner peripheral surfaces of the inner covering body is provided.

The curling portion 24CU provided at the upper end of the chamber cover 24 and the packing P are inserted into the engaging groove 26G at the lower end of the front cover 26. [

The cylindrical heat exchange pipe 10 is built in a space inside the casing 20 to which the rear cover 22 is coupled to the chamber cover 24 and the front cover 26. The inside of the inner periphery of the heat exchange pipe 10 And a spacing space of a predetermined distance is secured between the outer circumferential surface of the heat exchange pipe 10 and the inner circumferential surface of the casing 20. [

An insulator 26IS is provided in the burner cover engaging hole 226BH of the front cover 26. [ The insulator 26IS is a heat insulating function and can be fixed by a known fixing means such as welded or bolted to the burner cover engaging hole 226BH. A burner insertion hole 26IH penetrating the upper and lower surfaces of the insulator 26IS is provided at the center of the insulator 26IS.

The burner cover engaging hole 226BH formed at the center of the front cover 26 is blocked by the burner cover 27 coupled to the upper surface of the front cover 26. [

The burner cover 27 is a circular plate. A bolt insertion boss 27BI is provided on the periphery of the burner cover 27 and a bolt insertion hole communicated with the upper and lower surfaces is provided on the bolt insertion boss 27BI. The burner cover 27 is mounted in the burner cover engaging boss 226CB of the front cover 26 while the bolt insertion hole in the bolt insertion boss 27BI is placed on the upper cover piece upper surface of the front cover 26 The bolts are inserted into the bolt insertion holes provided in the bolt insertion bosses 27BI of the burner cover 27 and the bolts are inserted into the bolt insertion holes of the burner cover engaging bosses 26CB So that the burner cover 27 is fixed to the front cover 26. As shown in FIG. The burner cover 27 blocks the burner cover engaging hole 226BH in the central portion of the front cover 26. [ At this time, a packing P is interposed between the upper surface of the front cover 26 and the bottom surface of the burner cover 27. The packing P is interposed between the upper surface of the front cover 26 and the bottom surface of the burner cover 27 in a state where the packing P is fitted in the upwardly projecting piece protruding upward from the periphery of the burner cover engaging hole 226BH of the front cover 26 have.

The burner cover 27 is provided with a burner coupling hole aligned with the burner insertion hole 26IH of the insulator 26IS provided in the burner cover coupling hole 226BH of the front cover 26. [ The burner coupling holes communicate with the upper and lower surfaces of the burner cover 27. [ At this time, a space projection is provided on the inner ceiling surface of the burner cover 27. The space projection has a circular space projection shape, and at least two such space projections are provided concentrically. The lower end of the space projection on the inner upper surface of the burner cover 27 contacts the upper surface of the insulator 26IS provided in the burner cover engaging hole 226BH of the front cover 26, The upper surface of the insulator 26IS is spaced upward from the upper surface of the insulator 26IS.

A burner 30 is coupled to the burner insertion hole 26IH of the insulator 26IS provided below the burner cover 27 of the burner cover 27 and the burner 30 is in a barrel shape ) Inside the inner space of the heat exchange pipe (10). The duct 27DT is connected to the burner 30 and the duct 27DT extends from the upper surface of the front cover 26 to one side.

Baffles 16 are provided at both ends of the burner 30 so as to be spaced apart from the ends of the heat exchange pipes 10 (the inner ends of the burners 30). The baffle 16 is a plate-like (circular plate-like) plate having a flange at the periphery thereof. The flange portion of the baffle 16 is provided at one of the plurality of sleeves 12 of the heat- The baffle 16 is disposed so as to be spaced a predetermined distance from the inner end of the burner 30 by being fitted into the space between the upper sleeve 12 and the lower sleeve 12. [ At this time, the baffle 16 is also provided with the insulator 16IS. The insulator 16IS coupled to the baffle 16 also performs a thermal insulation function wherein a bolt coupled to the center of the baffle 16 is coupled to a central portion of the insulator 16IS and a nut is coupled to the baffle 16, And the insulator 16IS is combined.

The inner space portion of the casing 20 is divided into a sensible heat space and a latent heat space portion with respect to the baffle 16. That is, the space portion between the baffle 16 and the front cover 26 is the sensible heat space portion, and the space portion between the baffle 16 and the rear cover 22 is the latent heat space portion.

At this time, the present invention has a structure in which the distance between the inner circumferential surface and the outer circumferential surface of each sleeve 12 of the heat exchange pipe 10 is wider than the conventional one. The outer diameter of the heat exchange pipe 10 (that is, the outer circumference diameter of the heat exchange pipe 10) is approximately 248 mm, while the inner diameter of the heat exchange pipe 10 (i.e., the inner diameter of the heat exchange pipe 10) The outer diameter of the heat exchange pipe 10 of the present invention is increased to the range of 250 to 260 mm, thereby increasing the heat exchange heat transfer area passing through the inner space of each sleeve 12. That is, the heat transfer area of the heat exchange fluid passing through the inner space of the sleeve 12 is increased more than before. In the present invention, the distance between the outer circumferential surface of the heat exchange pipe 10 and the inner circumferential surface of the casing 20 may be in the range of 3 mm to 30 mm. The outer diameter of the heat exchange pipe 10 can be made larger and the outer diameter of the heat exchange pipe 10 is made larger so that the heat transfer area of the space in each of the sleeves 12 becomes larger You can do it. If the distance between the outer circumferential surface of the heat exchange pipe 10 and the inner circumferential surface of the casing 20 is less than 3 mm, there is no meaning of further increasing the outer diameter of the heat exchange pipe 10, If the distance between the inner circumferential surface of the heat exchanging pipe 10 and the inner circumferential surface of the casing 20 is larger than 30 mm, the outer diameter of the heat exchanging pipe 10 becomes too large and the heat exchanging efficiency of the heat exchanging fluid may drop. Is set to be within a range of 3 to 30 mm so as to be as close as possible.

In the present invention, a support unit (40) for supporting the rear cover (22) of the casing (20) and the front cover (26) is provided. The support unit 40 has a function of supporting the rear cover 22 constituting the casing 20 and the chamber cover 24 and the front cover 26 to be firmly coupled. To this end, the support unit 40 includes a rear support panel 42, a support bolt 44, and a support nut 46.

The rear support panel 42 has a plate shape having a predetermined area. In the present invention, the rear support panel 42 has a rectangular plate shape. The rear support panel (42) is provided with a rim extending rearward. A space portion opened rearward is formed inside the rear support panel 42 by the rim portion. The rear support panel 42 is provided with bolt coupling holes communicating with the front and rear surfaces.

The support bolt 44 has a bolt shaft structure having a head portion at a proximal end portion and a screw portion at an outer circumferential surface. The support bolt 44 is fitted in the bolt coupling hole of the bolt fastening boss 26BS provided in the front cover 26 in a state where the support bolt 44 is fitted in the bolt fastening hole of the rear support panel 42. [ In the present invention, the front cover 26 is provided with a plurality of bolt fastening bosses 26BS in the radial direction with respect to the central portion, and the rear support panel 42 is provided with a plurality of bolt fastening bosses 26BS aligned with the bolt fastening boss 26BS. A support bolt 44 of a predetermined length fitted in each bolt coupling hole of the rear support panel 42 is inserted into a bolt coupling hole communicated with the front and rear surfaces of the bolt fastening bosses 26BS of the front cover 26 Loses.

A support nut (46) is fastened to the support bolt (44). The support bolt 44 is inserted into the bolt coupling hole of the bolt fastening boss 26BS of the front cover 26 and protruded from the one surface of the bolt fastening boss 26BS to the other surface. And the support nut 46 is tightened to the support bolt 44 protruding from the other side.

The rear cover 22 of the casing 20 is connected to the rear support panel 42 and the front cover 26 is connected to the rear cover 22. The rear cover 22, the chamber cover 24 and the front cover 26, The support bolt 44 is engaged with each bolt coupling hole of the rear support panel 42 so as to be in contact with the front surface of the front cover 26 so that the support bolt 44 The rear cover 22 of the casing 20 and the chamber cover 24 and the front cover 26 are firmly coupled to each other by the tightening force of the support bolt 44 and the support nut 46 .

At this time, a cylindrical heat exchange pipe 10 is installed inside the casing 20. A lower end portion of the heat exchange pipe 10 (i.e., a portion of the lowermost sleeve 12) is provided in the bottom portion of the rear cover 22 And is supported by the support jaw 121 and the support piece 123. The lower end of the heat exchanger pipe 10 adjacent to the outer circumferential surface of the heat exchanger pipe 10 is supported by the support jaws 121 at the bottom of the rear cover 22. The support piece 123 at the bottom of the rear cover 22 supports the heat exchanger pipe 10 ) Is supported. The support piece 123 has a structure in which an outer support piece 123b and an inner support piece 123c are provided on a plate-shaped middle support piece 123a connected to the bottom of the rear cover 22, The lower end of the heat exchange pipe 10 adjacent to the inner circumferential surface is supported at the upper end of the outer support piece 123b and the inner circumferential surface of the heat exchange pipe 10 is held in contact with the outer circumferential surface of the middle support piece 123a.

The upper end portion of the heat exchange pipe 10 (i.e., the uppermost sleeve 12) is supported by a space projection provided on the inner ceiling surface of the front cover 26 and a heat exchange pipe support jaw. As a result, the lower end of the heat exchange pipe 10 is rigidly supported at a predetermined distance from the bottom surface of the rear cover 22.

FIG. 13 is a perspective view of a heat exchanger for a condensing boiler according to another embodiment of the present invention, and FIG. 14 is a perspective view showing a rear surface of FIG. The outlet port 124 is disposed at a position deviated from the position of the flow path 125 and is disposed coaxially with the central portion of the outlet port forming section 122 in the above embodiment of the present invention, The outlet port 124 is disposed at a position deviated from the position of the flow path 125 and at a position eccentric to one side from the central portion of the outlet port forming section 122. [ The other configuration of the present invention is the same as the configuration of the above-described embodiment except that the center of the outlet port 124 is eccentric to one side from the center of the outlet port forming portion 122. [ Therefore, redundant description of the configuration of another embodiment of the present invention will be omitted.

According to the present invention, the heat released by the burner 30 (combustion section) enters the inner space at the inner end of the heat exchange pipe 10, and the heat generated in each of the sleeves Heat exchange fluid (water or the like to be converted into boiler hot water) discharged into the outer end of the heat exchange pipe 10 through the space between the heat exchange pipe 10 and the heat exchange pipe 10, The heat exchange is performed by the heat passing between the sleeves 12 of the casing 10 and the hot gas is converted into hot water while the heat exchanged combustion gas flows through the flow path formed in the casing 20, And the second flow path 125B, through the outlet port 124. [0064] Through this process, the heat exchange fluid can be exchanged.

The structure of the heat exchanger of the present invention having the above-described structure is improved in structure with respect to thermal efficiency by the simplified structure, and the supporting structure for the casing 20 in which the heat exchange pipe 10 is built is improved. And the size changing structure of the casing 20 is improved in correspondence with the upper and lower sizes. The effect of the present invention is as follows.

1. Each of the sleeves 12 constituting the heat exchange pipe 10 is provided with a space projection 14 so as to secure a space separated from other sleeves 12 disposed at the lower portion thereof, The space protrusions 14 are brought into contact with the mutually facing surfaces of the upper and lower sleeves 12 so as to be spaced apart from the surfaces of the upper and lower sleeves 12 (i.e., the bottom surface of the upper sleeve 12 and the upper surface of the lower sleeve 12) The gap between the facing surfaces of the upper and lower sleeves 12 is also maintained so that the function of maintaining the gap between the upper and lower stacked sleeves 12 and the function of improving the heat conduction efficiency can be sufficiently achieved, ) Can be implemented as simple as possible.

2. The space projection 14 has a columnar first space projection 14a formed on at least one surface of the mutually facing surfaces of the sleeves 12 arranged to face up and down, And the second space projection 14b having a different shape from that of the first space projection 14a so that the combustion gas enters the inner end of the columnar first space projection 14a and turns to the side of the first space projection 14a, Since the combustion gas passes through the spacing spaces between the first space projection 14a, the second space projection 14b and the upper and lower sleeves 12, the heat exchange function is more increased, Can be fully demonstrated.

3. In the present invention, by further increasing the outer diameter of the heat exchange pipe 10, the height of the heat exchange pipe 10 is further reduced, and the heat exchange efficiency can be sufficiently achieved. Each sleeve 12 of the heat exchange pipe 10 is formed in a circular loop shape. Assuming that the distance of the sleeve 12 to the circular shape is one wheel, in the past, the sleeve 12 has to be rotated 15 times, While the present invention permits sufficient heat exchange capacity even if the sleeve 12 is rotated 10 times. That is, the present invention is meaningless in that the number of rotating wheels of the sleeve (12) of the heat exchange pipe (10) is not increased and the heat exchange capacity can sufficiently satisfactorily be obtained without increasing the height of the heat exchange pipe (10).

4. It is sufficient in terms of productivity and cost, since it is sufficient not to increase the number of rotating wheels of each sleeve 12 of the heat exchange pipe 10.

5. The casing 20 has a structure in which the rear cover 22, the chamber cover 24 and the front cover 26 are assembled and each rear cover 22 of the casing 20 and the chamber cover 24 and the front cover 26 can be firmly supported by the support bolt 44 and the support nut 46 so that the built-in portion of the heat exchange pipe 10 is supported by the casing 20 in a simple but rigid support structure Can be implemented. That is, the upper and lower ends of the chamber cover 24 are fitted to the joint grooves 22G and 26G of the rear cover 22 and the front cover 26, respectively, and the rear cover 22 and the chamber cover 24, When the support bolt 44 coupled to the rear support cover is inserted into the bolt coupling boss 26a of the front cover 26 and the support nut 46 is fastened to the support bolt 44, The assembly structure of the heat exchange pipe 10 and the casing 20, which are the main components, can be simplified, and the robustness of the assembled structure can be expected to be enhanced.

6. The casing 20 is formed by assembling the rear cover 22, the chamber cover 24 and the front cover 26 so as to grind the heat exchange pipe 10 due to the change of the heat exchange pipe 10 If necessary, the chamber cover 24 can be replaced with another standard, which is advantageous in terms of maintenance and the like.

7. A curling portion 24CU bent in an upper end portion and a lower end portion of the chamber cover 24 constituting the casing 20 is provided so as to prevent the curling portion 24CU from being deformed due to thermal deformation of the chamber cover 24. [ It has a stronger property such as thermal stress and thermal deformation.

8. When the packing P is inserted into the curling portion 24CU of the chamber cover 24 and the engaging grooves 22G of the rear cover 22 and the engaging grooves 22G and 26G of the front cover 26 are engaged with each other, The sealing structure between the chamber cover 24 and the rear cover 22 and the front cover 26 by the packing P is firm and the packing P is sealed by sealing the upper and the lower ends of the chamber cover 24, The structure can be assembled more easily and smoothly.

9. The flow path of the casing 20, in other words, the first flow path 125A and the second flow path 125B are formed in one side with respect to the space inside the heat exchange pipe 10 built in the casing 20 So that the combustion gas is exhausted through the eccentric flow path of the casing 20 and the combustion gas is exhausted to the outlet port 124 communicated with the flow path Therefore, it is more effective to increase the heat exchange efficiency. The combustion gas is discharged directly to the outlet port 124 after passing through the flow path of the long path without being discharged directly to the outlet port 124, which is more helpful for increasing the heat exchange efficiency.

10. When the heat exchange pipe 10 is embedded in the casing 20, the support protrusion 121 of the rear cover 22, the support piece 123, the spacer protrusion of the front cover 26, Since the heat exchange pipe 10 is spaced apart from the bottom surface of the rear cover 22 by a certain distance, The heat loss to the outside of the heat exchanger can be reduced and the heat efficiency can be further enhanced.

11. Since the packing P is coupled to the outer circumferential surface of the upper support piece of the front cover 26 and the packing P is interposed between the burner cover 27 and the front cover 26, The joint part sealing structure between the front cover 26 and the front cover 26 is rigid and the packing P is supported by the upwardly supporting piece of the front cover 26 to hold it in position.

12. The flow path 125 inside the outlet port forming portion 122 of the rear cover 22 is provided with a plurality of bridge pieces 125BP connected to both ends of the outlet forming plate, The flow path 125 is divided into a plurality of pass sector holes 125AH so as to allow the combustion gas to pass through each of the pass sector holes 125AH, And the strength of the outlet port forming portion 122 is reinforced by each bridge piece 125BP, which is more robust in terms of strength.

The specific embodiments of the present invention have been described above. It is to be understood, however, that the scope and spirit of the present invention is not limited to these specific embodiments, and that various modifications and changes may be made without departing from the spirit of the present invention. If you have, you will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

10. Heat exchange pipe 12. Sleeve
14. Space projection 14a. The first space projection
14b. Second space projection 16. Baffle
16IS. Insulator 20. Casing
22. Rear cover 22SC. Sleeve connection port
22G. Coupling groove 24. chamber cover
24CU. Curling portion 26. Front cover
26SC. Sleeve connection port 26a. Bolt coupling boss
26BH. Burner cover engaging hole 26CB. Burner cover engaging boss
26G. Combination groove 27. Burner cover
27BI. Bolt insertion boss 26BS. Bolt fastening boss
27DT. Duct 30. Burner
40. Support unit 42. Rear support panel
44. Support bolt 46. Support nut
121. Support jaw 122. Outlet port forming section
122A. The connection port pet porting plate 122B. Cross Outlet Port Forming Plate
122C. Outlet port foaming plate 123. Support piece
123a. Middle support part 123b. Outer support piece
123c. Inner support piece 124. Outlet port
125. Flow path 125A. The first flow pass
125B. The second flow path 125BP. Bridge
125AH. Pass sector hole

Claims (10)

A heat exchange pipe (10) having a tubular shape in which a plurality of looped sleeves (12) are stacked and the inside of the sleeve (12) is configured to communicate with an inlet port and an outlet port;
A casing (20) having a rear cover (22) and a front cover (26) to form a space in which the heat exchange pipe (10) is housed;
A burner 30 coupled to the casing 20 to be disposed in an inner space of the heat exchange pipe 10;
And a support unit (40) for supporting the rear cover (22) of the casing (20) to be engaged with the front cover (26)
The casing (20) comprises a chamber cover (24) interposed between the rear cover (22) and the front cover (26)
The support unit (40)
A rear support panel (42) which is in close contact with the rear cover (22);
A plurality of support bolts (44) joined to the rear support panel (42) and the front cover (26) at the same time;
And a support nut (46) fastened to the support bolt (44)
The rear cover 22 is provided with an outlet port forming section 122 at one side thereof and the outlet port forming section 122 is connected to the connecting port port forming plate 122A and the cross outlet port forming plate 122B, Plate 122C,
The connection outlet port forming plate 122A is formed in a plate shape having a first flow path 125A communicated with an inner space portion of the rear cover 22 inside the connection outlet port forming plate 122A, A bridge piece 125BP for dividing the first flow path 125A into a plurality of pass sector holes 125AH is provided inside,
The cross-outlet port forming plate 122B is disposed to face the outer peripheral surface of the rear cover 22 in a direction perpendicular to the outer end of the connection port port forming plate 122A,
The outlet port forming plate 122C has an outlet port 124 and is coupled to the cross outlet port forming plate 122B and is disposed between the outlet port forming plate 122C and the cross outlet port forming plate 122B. A second flow path 125B communicating with the first flow path 125A of the connection port port forming plate 122A is formed,
The first flow path 125A extends laterally in the inner space of the rear cover 22 and the second flow path 125B extends in a direction orthogonal to the inner space of the rear cover 22 The flow path of the rear cover 22 is made up of the navigator flow path,
The support piece 123 provided at the bottom of the rear cover 22 is provided with the outer support piece 123b and the inner support piece 123c in the middle support piece 123a, The inner circumferential surface of the heat exchange pipe 10 is supported in contact with the outer circumferential surface of the middle support piece 123a by the support piece 123, Wherein the heat exchange pipe (10) is supported at a predetermined distance from the bottom of the rear cover (22).
delete The method according to claim 1,
The sleeve (12) of the heat exchange pipe (10) is configured in a cross-sectional oval shape having a greater distance between the inside and outside than the height between the upper and lower sides, and between the outside end of the sleeve (12) Is in the range of 3 to 30 mm. ≪ Desc / Clms Page number 13 >
delete delete delete delete delete The method according to claim 1,
Wherein the front cover 26 is provided with a bolt coupling boss 26a and the support bolt 44 is inserted into the bolt coupling boss 26a to fasten the support nut 46. [ heat transmitter.
The method according to claim 1,
The rear cover 22 and the front cover 26 are respectively provided with engaging grooves 22G and 26G at opposite ends thereof and both ends of the chamber cover 24 are engaged with the rear cover 22, Is coupled to the coupling grooves (22G, 26G) of the chamber cover (26), and curled portions (24CU) are provided at both ends of the chamber cover (24).

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