KR20110080977A - Heat exchanger - Google Patents

Abstract

PURPOSE: A heat exchanger is provided to have a simple structure and to improve durability, and to minimize a heat exchanger by securing the heating area for heat exchange sufficiently. CONSTITUTION: A heat exchanger is formed in the shape of a coil(100,200,300) by winding a pipe in a circle, wherein adjacent pipes are adhered closely to cut off the flow of combustion byproducts between the adjacent pipes and to make combustion byproducts flow in a cylindrical inside space(115,215,315) only formed by the coil of the pipe.

Description

Heat exchanger {HEAT EXCHANGER}

The present invention relates to a coil-shaped heat exchanger made by winding a pipe in a circular shape, and more particularly, along a cylindrical inner space formed by a coil wound by processing a coil so that adjacent pipes wound in a circular shape closely adhere to each other. The heat exchanger is provided with a flow path for the combustion product and maximizes the heat transfer efficiency with the heating water flowing along the inside of the coil, thereby simplifying and miniaturizing the heat exchanger structure and making it easy to clean the inside of the heat exchanger. It is about.

Boilers, which are widely used for heating and hot water supply facilities in homes, are classified according to various criteria such as the fuel used to heat the heating water, the location of heat sources and burners.

That is, depending on the fuel used, it is divided into an oil boiler and a gas boiler. The oil boiler uses light oil or kerosene as fuel, and the gas boiler uses LPG or LPG as fuel.

In addition, it may be classified into a general type boiler which performs heat exchange only by sensible heat generated from fuel combustion, and a condensing boiler which performs heat exchange by sensible heat and latent heat of condensation generated from sensible heat exchanger.

In addition, according to the position of the burner for burning fuel, the burner is divided into an up-fired boiler located at the bottom of the boiler, and a down-fired boiler located at the top of the boiler.

1 is a cross-sectional view showing the structure of a conventional tubular oil boiler, showing an upward combustion general type oil boiler among the types of the boiler.

In the conventional tubular oil boiler, the combustion chamber 1 is formed in the lower part, and the burner 2 which produces | generates a flame toward the inside of the combustion chamber 1 is provided.

On the upper side of the combustion chamber 1, a plurality of pipes 3, through which combustion gas passes through and forming heat exchangers, are fixed to the support plates 6a and 6b by welding.

And it is provided with a tube (4) for accommodating the combustion chamber (1) and the tube (3) and forming the outer body of the boiler, the exhaust hood (5) is installed on the upper side of the tube (3) to discharge the combustion gas.

In the space between the pipe (3) and the tube (4) is formed a water tank (7) for receiving the heating water, the heating water introduced through the heating water inlet (8) passes through the water tank (7) After being subjected to heat exchange with the combustion gas flowing inside, it is supplied to the heating source through the heating water outlet (9).

In this way, the conventional oil boiler is soot generated during combustion of the fuel can not use the fin-tube heat exchanger for the gas boiler, it is to use a tubular heat exchanger as described above.

However, the conventional tubular heat exchanger has a structure in which the upper and lower ends of the tube 3 are welded to the support plates 6a and 6b by welding in a state where a plurality of tubes 3 are disposed inside the tube 4. This is not easy because of the possibility of water leakage due to poor welding, and due to the large number of welding spots are difficult to manufacture, the durability of the weld area, there was a problem that the cleaning work inside the heat exchanger for removing soot is not easy. .

In addition, according to the conventional tubular heat exchanger structure, in order to secure a sufficient heat transfer area, it is necessary to install the length of the pipe (3) long, so that the volume of the heat exchanger becomes large, and there is a problem in that productivity and economy are inferior.

The present invention has been made in order to solve the above problems, to produce a coil-shaped heat exchanger by winding the pipe in a circular shape, the structure is simple and excellent in durability, and sufficient heat transfer area for heat exchange to miniaturize the heat exchanger The purpose is to provide a heat exchanger that can.

In the heat exchanger of the present invention for realizing the object as described above, in the coil-shaped heat exchanger made by winding the pipe in a circular shape, by closely adhering adjacent pipes, the flow of combustion products between the adjacent pipes is blocked, It is characterized in that the combustion product flows only into the cylindrical inner space formed by the coil of the wound pipe.

In addition, the heat exchanger is installed in the coil, the upper support is inserted into the upper end of the coil fixed inside, the lower support is inserted into the lower end of the coil and fixed to the outer side of the coil is installed a plurality of the upper support It may be configured to include a coil assembly consisting of an intermediate support for connecting and fixing the lower support.

In addition, the inner surface of the upper support and the lower support may be configured to have an inclined surface having an inclination corresponding to the inclination angle in which the coil is inclined relative to the horizontal plane.

In addition, a plurality of circular grooves corresponding to the shape of the outer surface of the coil may be formed on the inner surface of the intermediate portion support, and the outer surface of the coil may contact the inner surface of the circular groove of the intermediate portion support. .

In addition, the coil assembly is composed of a plurality of coil assemblies radially spaced apart from each other, the inner diameter of the coil wound in a circular shape, and may be composed of a combustion product flowing through the internal space between the plurality of coil assemblies. have.

The plurality of coil assemblies may include an inner coil assembly, an intermediate coil assembly spaced apart from the outside of the inner coil assembly, and an outer coil assembly spaced apart from the outside of the intermediate coil assembly. The product sequentially passes through the first space portion inside the inner coil assembly, the second space portion between the inner coil assembly and the middle coil assembly, and the third space portion between the middle coil assembly and the outer coil assembly. It can be configured to flow.

In addition, the inner coil assembly, the intermediate coil assembly, and the outer coil assembly are installed such that the upper support and the lower support adhere to the inner surface of the case of the heat exchanger, and the lower support of the inner coil assembly and the intermediate coil assembly The upper support may be composed of a movement passage of the combustion product is formed between the inner surface of the case.

In addition, the coil lower end of the inner coil assembly may be extended to be connected to the coil lower end of the intermediate coil assembly, the coil upper end of the intermediate coil assembly may be configured to extend to the coil upper end of the outer coil assembly.

In addition, the lower end of the coil of the outer coil assembly may be connected to the inlet pipe into which the cold water is introduced, and the upper end of the coil of the inner coil assembly may be configured to be connected to the outlet pipe through which the hot water through heat exchange with the combustion product flows out.

In addition, the coil of the inner coil assembly and the coil of the intermediate coil assembly may be wound so as to be in close contact between the adjacent pipes without a gap, and the coil of the outer coil assembly may be wound so as to be spaced a predetermined distance between adjacent pipes.

According to the heat exchanger according to the present invention, the flow of the combustion product is blocked between the adjacent pipes of the coil and the flow path is formed so that the combustion product flows only into the inner space of the cylindrical cylinder formed by the coil to sufficiently secure the heat transfer area for heat exchange. It is possible to make a compact heat exchanger has the advantage.

In addition, according to the present invention, the assembly structure of the heat exchanger is simplified, not only easy to manufacture, but also improve the durability of the heat exchanger, there is an advantage that can be easily performed the cleaning work inside the heat exchanger.

1 is a cross-sectional view showing the structure of a conventional tubular oil boiler,
2 is a side cross-sectional view of a heat exchanger according to the present invention;
3 is a side view of the inner coil assembly of the heat exchanger according to the present invention;
4 is a plan view of FIG.
5 is a perspective view of the inner coil shown in FIG.
6 is a perspective view and a cross-sectional view of the upper support shown in FIG.
7 is a perspective view and a cross-sectional view of the lower support shown in FIG.
8 is a perspective view of the intermediate support shown in Figure 3,
9 is a cross-sectional view of the outlet pipe shown in FIG.
10 is a side view of an intermediate coil assembly of a heat exchanger according to the present invention;
FIG. 11 is a plan view of FIG. 10;
12 is a perspective view of the intermediate part coil shown in FIG.
13 is a perspective view and a cross-sectional view of the upper support shown in FIG.
14 is a perspective view of the lower support shown in FIG.
15 is a perspective view of the intermediate support shown in Figure 10,
16 is a side view of the outer coil assembly of the heat exchanger according to the present invention;
17 is a plan view of FIG. 16;
18 is a perspective view of the outer coil shown in FIG. 16;
19 is a perspective view of the upper support shown in FIG.
20 is a perspective view of the lower support shown in Figure 16,
Figure 21 is a perspective view of the intermediate support shown in Figure 16,
22 is a cross-sectional view of the intake pipe shown in FIG.

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

2 is a side cross-sectional view of a heat exchanger according to the present invention.

The heat exchanger according to the embodiment of the present invention includes an upper case 10 and a lower case 20, an inner coil assembly 100, an intermediate coil assembly 200, and an outer coil assembly 300.

The upper case 10 forms an upper surface of the heat exchanger, and a burner (not shown) is installed at the upper case 10, and a burner insertion hole 11 is formed at the center of the upper case 10, so that the burner is inserted into the upper case 10. The generated combustion gas is moved along the first space 115.

One side of the burner insertion opening 11 is formed with a water discharge pipe 40 through which hot water passed through heat exchange is discharged.

The lower case 20 forms a side surface and a bottom surface of the heat exchanger, and an inlet pipe 30 through which low temperature water is introduced is formed at one lower side thereof, and a combustion gas outlet 21 and a condensate outlet 22 are formed at the lower side of the other side. Formed.

The middle coil assembly 200 is positioned outside the inner coil assembly 100, and the outer coil assembly 300 is positioned outside the intermediate coil assembly 200.

According to this arrangement structure, a first space 115 is formed inside the inner coil assembly 100 to burn the burner, and is disposed between the outer side of the inner coil assembly 100 and the inner side of the middle coil assembly 200. A second space portion 215 is formed therein, and a third space portion 315 is formed between the outside of the middle coil assembly 200 and the inside of the outer coil assembly 300.

A lower portion of the first space 115 and the second space 215 communicate with each other, and a second structure 215 and the third space 315 communicate with each other.

Accordingly, the combustion product generated in the first space 115 is moved downward along the first space 115 as indicated by the arrow in FIG. 2, and then the flow direction is changed to change the second space 215. Therefore, it is moved upward, the flow path direction is changed again in the upper portion of the second space portion 215 is moved downward along the third space portion 315 and then discharged to the outside of the heat exchanger through the combustion gas outlet 21.

Meanwhile, the low temperature water introduced through the water inlet pipe 30 passes through the coils of the outer coil assembly 300, the intermediate coil assembly 200, and the inner coil assembly 100 in order to sequentially pass through the first space part ( The heat exchange with the combustion gas flowing through the 115 and the second space portion 215 and the third space portion 315 is performed, and the hot water heated through the heat exchange is supplied to the heating source through the outlet pipe 40.

Hereinafter, the configuration of the inner coil assembly 100, the intermediate coil assembly 200, and the outer coil assembly 300 constituting the heat exchanger according to the present invention and their coupling relationship will be described.

Figure 3 is a side view of the inner coil assembly of the heat exchanger according to the invention, Figure 4 is a plan view of Figure 3, Figure 5 is a perspective view of the inner coil shown in Figure 3, Figure 6 is a perspective view of the upper support shown in Figure 3 and 7 is a perspective view and a sectional view of the lower support shown in FIG. 3, FIG. 8 is a perspective view of the intermediate support shown in FIG. 3, and FIG. 9 is a sectional view of the outlet pipe shown in FIG.

The inner coil assembly 100 shown in FIGS. 3 and 4 includes the inner coil 110 of FIG. 5, the upper support 120 of FIG. 6, the lower support 130 of FIG. 7, and the intermediate support of FIG. 8. 140.

The inner coil 110 is formed by winding a pipe having a circular cross section in a coil shape, and is formed to be in close contact with adjacent pipes stacked up and down, thereby forming a first space part 115 formed inside the inner coil 110. The flow path is formed so that the combustion product including the combustion gas flowing along) flows only along the longitudinal direction of the internal space formed by the cylindrical coil, and blocks the combustion product from flowing between adjacent lateral pipes.

The upper end 111 of the inner coil 110 is fitted to the lower end portion 42 of the outlet pipe 40 shown in FIG. 9 in an airtight state by O-ring 43, and the outlet pipe 40 The upper end portion 41 of the extending through the outlet tube insertion hole 121 formed on the upper surface of the upper support 120 to the upper case 10.

The lower end 112 of the inner coil 110 extends and is connected to the lower end 212 of the intermediate part coil 210 constituting the intermediate part coil assembly 200 to be described later.

The upper end 111 of the inner coil 110 is inserted into and fixed inside the upper support 120, and the lower end 112 is inserted into the lower support 130 and fixed to the inside of the inner coil 110. On the outer side, intermediate supporters 140 for connecting and fixing the upper supporter 120 and the lower supporter 130 are spaced apart in plurality along the circumferential direction.

Referring to FIG. 6, inclined surfaces 122a to 122f having inclinations corresponding to inclination angles of the upper end 111 of the inner coil 110 inclined with respect to a horizontal plane are formed on an inner surface of the upper support 120. have.

Accordingly, the upper end 111 of the inner coil 110 may be fixed while being in close contact with the inner surface of the upper support 120 along the direction in which the upper coil 111 is wound.

In addition, since the upper surface of the upper support 120 is coupled to the bottom of the upper case 10 in close contact there is no movement of the combustion product between the upper support 120 and the upper case 10.

Referring to FIG. 7, the inclined surfaces 132a to 132j corresponding to the inclination angle of the lower end 112 of the inner coil 110 are formed on the inner side surface of the lower support 130, and thus the lower end of the inner coil 110. Along with the direction in which the 112 is wound, it may be fixed while being in close contact with the inner surface of the lower support 130.

A plurality of legs 135 protrude along the circumferential direction of the bottom surface of the lower support 130, and a lower end of the legs 135 is coupled to the bottom surface of the lower case 20, so that the lower support 130 ) And the lower case 20 is provided with a passage through which the first space portion 115 and the second space portion 215 communicate with each other to move the combustion product formed by the combustion action of the burner.

Referring to FIG. 8, a plurality of circular grooves 142 corresponding to the shape of the outer surface of the inner coil 110 are formed on the inner surface of the intermediate support 140, and the inner surface of the circular groove 142. And the outer surface of the inner coil 110 are in contact with each other.

Accordingly, the gap between the pipes vertically adjacent to each other due to the heat deformation of the inner coil 110 in contact with the high temperature combustion product can be prevented from being fixed to maintain the shape of the inner coil 110.

10 is a side view of the intermediate coil assembly of the heat exchanger according to the present invention, FIG. 11 is a plan view of FIG. 10, FIG. 12 is a perspective view of the intermediate coil shown in FIG. 10, and FIG. 13 is an upper support of FIG. 10. Perspective and sectional view, FIG. 14 is a perspective view of the lower support shown in FIG. 10, and FIG. 15 is a perspective view of the intermediate support shown in FIG.

The intermediate coil assembly 200 illustrated in FIGS. 10 and 11 includes the intermediate coil 210 of FIG. 12, the upper support 220 of FIG. 13, the lower support 230 of FIG. 14, and the intermediate of FIG. 15. It is composed of a support 240.

Referring to FIG. 12, the lower end 212 of the middle coil 210 extends and is connected to the lower end 112 of the inner coil 110, and the upper end 211 of the middle coil 210 is described later. It is connected to the upper end portion 311 of the outer coil 310 constituting the outer coil assembly 300 is extended.

Referring to FIG. 13, a plurality of legs 225 protrude along the circumferential direction on an upper surface of the upper support 220, and an upper end of the legs 225 is coupled to a bottom surface of the upper case 10. The second space portion 215 and the third space portion 315 communicate with each other between the upper support 220 and the upper case 10 to provide a passage through which the combustion product is moved.

In addition, the inclined surfaces 222a to 222e are formed on the inner surface of the upper support 220 so that the upper end 211 of the intermediate coil 210 may be fixed in close contact.

Referring to FIG. 14, the lower support 230 is compared with the lower support 130 of the inner coil assembly 100 illustrated and described with reference to FIG. 7 except for the structure in which the legs 135 are not formed on the bottom surface. May be configured in the same structure.

Since the bottom of the lower support 230 is coupled to the bottom surface of the lower case 20 closely coupled there is no movement of the combustion product between the lower support 230 and the lower case 20.

Referring to FIG. 15, the middle supporter 240 has a circular groove 242 formed on the inner side in the same manner as the middle supporter 140 of FIG. 8. The side and the outer surface of the intermediate coil 210 is in contact with each other in close contact.

Figure 16 is a side view of the outer coil assembly of the heat exchanger according to the present invention, Figure 17 is a plan view of Figure 16, Figure 18 is a perspective view of the outer coil shown in Figure 16, Figure 19 is a perspective view of the upper support shown in Figure 16, 20 is a perspective view of the lower support shown in FIG. 16, FIG. 21 is a perspective view of the intermediate support shown in FIG. 16, and FIG. 22 is a cross-sectional view of the water inlet pipe shown in FIG.

The outer coil assembly 300 shown in FIGS. 16 and 17 includes an outer coil 310 of FIG. 18, an upper support 320 of FIG. 19, a lower support 330 of FIG. 20, and an intermediate support of FIG. 21. 340.

Referring to FIG. 18, unlike the structure in which the inner coil 310 and the intermediate coil 210 are wound in close contact with each other without any gap between adjacent pipes, the outer coil 310 is disposed between adjacent pipes. There is a difference in that it consists of a structure wound so as to be spaced apart.

The internal coil 110 and the intermediate part coil 210 have a structure in which the coil is wound in close contact with each other so that combustion products leading to the first space part 115, the second space part 215, and the third space part 315 are formed. It is configured to maximize the moving distance of the combustion product by forming a flow path that can be switched alternately upward or downward.

In contrast, the external coil 310 discharges the combustion product flowing into the third space 315 through the first space 115 and the second space 215 through the combustion gas outlet 21. It is installed in the final space, which is formed so as to be spaced apart by a predetermined distance (d) between adjacent pipes can increase the heat transfer area because the surface area that the combustion product and the outer coil 310 is in contact with each other can be wider than in close contact. Will be.

And the upper end 311 of the outer coil 310 is extended to the upper end 211 of the intermediate coil 210, the lower end 312 of the outer coil 310 is the water inlet pipe shown in FIG. 30 is fitted to the lower end 32 of the O-ring 33 in the airtight state, the upper end 31 of the water supply pipe 30 is extended to the outside of the lower case 20 so that the cold water supply ( Shown).

As described above, the upper support 320 and the lower support 330 shown in FIGS. 19 and 20 also have inclined surfaces corresponding to the inclination angles of the upper end 311 and the lower end 312 of the outer coil 310. It is configured to be formed, each coupled in close contact with a portion of the bottom surface of the lower case 20 and the lower case of the upper case (10).

Referring to FIG. 21, in the intermediate support 340, a plurality of circular grooves 342 are formed to be spaced apart from each other by a predetermined interval d, and the inner surface and the outer coil 310 of the circular groove 342. ) The outer surface of the contact in close contact.

As described above, the heat exchanger of the present invention includes an inner coil assembly 100, an intermediate coil assembly 200, and an outer coil assembly 300 having inner spaces having different diameters, respectively, of the upper case 10 and the lower case 20. Combined inside to form a flow path of combustion products and heating water, it is possible to maximize the heat transfer efficiency to the volume of the heat exchanger, and by adopting a joint structure without welding, the durability of the heat exchanger is improved and the heat exchanger structure is simplified. And it can be miniaturized to facilitate the internal cleaning of the heat exchanger.

It is apparent to those skilled in the art that the present invention is not limited to the above embodiments and can be practiced in various ways without departing from the technical spirit of the present invention. will be.

1: combustion chamber 2: burner
3: Association 4: Constitution
5: exhaust hood 6a, 6b: support plate
7: water tank 8: heating water inlet
9: heating water outlet 10: upper case
20: lower case 11: burner insertion opening
21: combustion gas outlet 30: inlet pipe
40: outlet pipe 100: inner coil assembly
110: inner coil 120, 220, 320: upper support
130,230,330: Lower support 135,225: Leg
140,240,340: Intermediate support 142,242,342: Circular groove
200: middle part coil assembly 210: middle part coil
300: outer coil assembly 310: outer coil

Claims (10)

In the coil-shaped heat exchanger made by winding a pipe in a circular shape,
The heat exchanger characterized in that the combustion product flows only to the cylindrical inner space formed by the coil of the wound pipe is blocked by the flow of the combustion product between the adjacent pipes in close contact. The method of claim 1,
The heat exchanger is provided with a plurality of upper supports, the upper support is inserted into the coil, the upper end of the coil is fixed to the inside, the lower support is inserted into the lower end of the coil and fixed to the outer side of the coil and Heat exchanger comprising a coil assembly consisting of an intermediate support for connecting and fixing the lower support. The method of claim 2,
And an inclined surface having an inclination corresponding to an inclination angle in which the coil is inclined with respect to a horizontal plane on inner surfaces of the upper support and the lower support. The method of claim 2,
The inner surface of the intermediate portion support is formed with a plurality of circular grooves corresponding to the shape of the outer surface of the coil, the heat exchanger characterized in that the outer surface of the coil in contact with the inner surface of the circular groove of the intermediate portion support . The method according to any one of claims 2 to 4,
The coil assembly is composed of a plurality of coil assemblies spaced in the radial direction and different from each other the inner diameter of the coil wound in a circular, heat exchange, characterized in that the combustion product flows through the inner space between the plurality of coil assemblies group. The method of claim 5,
The plurality of coil assemblies may include an inner coil assembly, an intermediate coil assembly spaced apart from the outside of the inner coil assembly, and an outer coil assembly spaced apart from the outside of the intermediate coil assembly.
The combustion product may include a first space portion inside the inner coil assembly, a second space portion between the inner coil assembly and the middle coil assembly, and a third space portion between the middle coil assembly and the outer coil assembly in order. Heat exchanger, characterized in that flowing through. The method of claim 6,
The inner coil assembly, the middle coil assembly, and the outer coil assembly are installed such that the upper support and the lower support are in close contact with the inner surface of the case of the heat exchanger, and the lower support of the inner coil assembly and the upper portion of the middle coil assembly are The support is a heat exchanger, characterized in that the movement passage of the combustion product is formed between the inner surface of the case. The method of claim 6,
The coil lower end of the inner coil assembly extends and is connected to the coil lower end of the intermediate coil assembly, and the coil upper end of the intermediate coil assembly extends and is connected to the coil upper end of the outer coil assembly. The method of claim 8,
And a coil lower end of the outer coil assembly is connected to an inlet pipe through which cold water is introduced, and a coil upper end of the inner coil assembly is connected to an outlet pipe through which hot water is passed through heat exchange with a combustion product. The method of claim 6,
The coil of the inner coil assembly and the coil of the intermediate coil assembly is wound so as to be in close contact between the adjacent pipes without a gap, and the coil of the outer coil assembly is wound so as to be spaced a predetermined distance between adjacent pipes.

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