KR100353761B1 - Heat exchanger structure of condensing gas boiler - Google Patents

Abstract

The present invention has a two-stage structure of a heat exchanger consisting of a main heat exchanger and an auxiliary heat exchanger installed for heat exchange, thereby minimizing heat released and lost during heat exchange, and also unnecessary heat transfer area of a heat radiation fin coupled to a heat exchange pipe. Of heat exchanger structure of condensing gas boiler to reduce the frictional resistance generated on the surface of radiating fins to improve the exhaust performance and to suppress the generation of nitrogen oxide (NOx), which is excellent in combustibility and combustion. In the heat exchanger of the condensing gas boiler comprising a main heat exchanger and an auxiliary heat exchanger for absorbing heat generated by ignition and combustion of a burner to heat the heating water for heating and hot water supply, the auxiliary heat exchanger has a predetermined gap in the middle. Heat is divided into equal parts and divided into upper and lower bodies so that In addition to efficiently absorbing heat and latent heat of condensation, and improving exhaustability and combustibility, corrosion can be suppressed by reducing the generation of nitrogen oxides (NOx), which are harmful components contained in the exhaust gases generated during combustion. By reducing the unnecessary heat transfer area of the heat sink fins, the cooling phenomenon can be suppressed to increase the thermal efficiency, thereby obtaining the maximum heat energy with the least amount of fuel.

Description

Heat Exchanger Structure of Condensing Gas Boiler {HEAT EXCHANGER STRUCTURE OF CONDENSING GAS BOILER}

The present invention relates to a heat exchanger structure of a condensing gas boiler, and more particularly, to a heat exchanger consisting of a main heat exchanger and an auxiliary heat exchanger installed for heat exchange to have a two-stage structure, thereby minimizing heat released and lost during heat exchange. In addition, by eliminating unnecessary heat transfer area of the heat sink fins coupled to the heat exchange pipe, it reduces frictional resistance generated on the surface of the heat sink fins to improve the exhaust performance, which is excellent in combustibility and generates NOx, an exhaust gas component generated during combustion. The heat exchanger structure of a condensing gas boiler which can be suppressed is related.

In general, gas boilers are used for heating and hot water supply in general homes or industrial sites. In general, gas boilers are generated by a combustor and a combustion device for igniting and burning fuel (gas or oil). It can be divided into a heat exchanger that transfers the amount of heat to the heating water to make it into a high temperature state, and a heating pipe that circulates and supplies heating water that has been heat-exchanged at a high temperature state for heating and hot water supply. It is divided into boiler and oil boiler.

In particular, the present invention deals with the heat exchanger of the gas boiler, the heat exchanger is the core technology for the gas boiler, a lot of research and development is made to obtain the maximum thermal efficiency using the least fuel (gas) In addition, shortening the life of the boiler due to the corrosion phenomenon caused by the drain generated during the heat exchange (NOx, which is a corrosive component contained in the exhaust gas generated during combustion) has emerged as the biggest problem. .

At present, a heat exchanger for solving the above problems has been known by Patent No. 132742 (hereinafter referred to as Patent 1) and Patent No. 257573 9 or below, referred to as Patent 2). Looking at, first, the heat exchanger according to the prior patent 1 constitutes the main heat exchanger (1a) having a plurality of fins (12a) installed on the outer periphery of the water pipe (11), as shown in the accompanying drawings The sub-heat exchange part 1b which provided the some fin 12b in the outer periphery which becomes an upstream part of the said main heat exchange part 1a in the pipe 11 is comprised, and the combustion apparatus in an exhaust path In the heat exchanger in which the main heat exchanger (1a) and the subheat exchanger (1b) are arranged in the downstream side so as to absorb sensible and latent heat, the fins (12a) of the main heat exchanger (1a) are formed of copper. In addition, the water pipe 11 and the fin 12b of the sub-heat exchange part 1b are made of aluminum. As shown in FIG. 2, the prior patent 2 has a heat-sensing part pin 13 for absorbing sensible heat by brazing welding around a heat exchange pipe 19 arranged up and down, and a heat medium flowing therein, An upper sensible heat exchanger 20 configured to absorb sensible heat from the sensible heat fin 13 and transfer the sensible heat to the heat medium and absorb the combustion sensible heat generated by the burner 18, and a heat exchange pipe arranged up and down ( 30 is formed of a latent heat portion fin 24 for brazing welding absorbing latent heat and a heat exchanger pipe 30 for absorbing latent heat from an external latent heat portion pin 24 and transferring it to the heat medium. The latent heat exchanger 22 which absorbs the residual heat of the sensible heat and the latent heat of condensation generated during condensation is provided at the sensible heat exchanger 20.

Therefore, the prior patent 1 as described above is to prevent the corrosion caused by the drain generated during heat exchange by using the fin material of the main heat exchange part and the water pipe or fin of the sub-heat exchange part as aluminum material, and the prior patent 2 is It is to reduce the heat loss emitted to the outside by the exhaust gas by having a dual structure consisting of a sensible heat exchanger and a latent heat exchanger.

However, in the prior patent 1 as described above, drain generation is suppressed, thereby preventing corrosion, but there is a disadvantage in that thermal efficiency decreases due to a large amount of heat released and lost during heat exchange. The structure has the advantage of minimizing the amount of heat released to the outside during heat exchange, which has the advantage of increasing the thermal efficiency.However, there is concern about corrosion due to drain generation and the heat transfer area for fins for heat absorption during heat exchange is too large. As a result, it has a closed end in which exhaustability and combustibility are reduced.

The present invention is to solve the above-mentioned end point, the purpose is to have a heat exchanger having a two-stage structure to efficiently absorb the latent heat and condensation latent heat during heat exchange, as well as to improve the exhaustability and combustibility exhaust gas generated during combustion Corrosion can be suppressed by reducing the generation of nitrogen oxides (NOx), which are harmful components in the gas, and heat efficiency can be reduced by reducing the heat transfer area of the heat sink fins that absorb heat, thereby increasing the thermal efficiency. It is to provide a heat exchanger structure of a condensing gas boiler of a new type to obtain a thermal energy of.

In order to achieve the above object, the present invention provides a heat exchanger of a condensing gas boiler comprising a main heat exchanger and an auxiliary heat exchanger for absorbing heat generated by ignition and combustion of a burner to heat heating water for heating and hot water supply. The auxiliary heat exchanger has a feature of being divided into upper and lower bodies so as to generate a predetermined gap in the middle.

In the present invention as described above, the main heat exchanger has a feature that is divided into equal parts and divided so as to have a gap.

1 is a schematic view showing a condensing gas boiler according to the prior patent 1,

Figure 2 is a schematic diagram showing a condensing gas boiler according to the prior patent 2,

3 is a schematic view showing a condensing gas boiler equipped with a heat exchanger according to the present invention;

4 is an enlarged cross-sectional view showing an auxiliary heat exchanger of the heat exchanger according to the present invention;

5 is an enlarged perspective view of a portion A of FIG. 3;

6 is a schematic view showing another embodiment of the heat dissipation fin of the heat exchanger according to the present invention;

7 is a schematic view showing another embodiment of a heat exchanger according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: case 102: burner

103: combustion chamber 104, 104 ', 104 ": heat radiation fin

105: heat exchange pipe 110, 110 ': main heat exchanger

120, 120 ': Secondary heat exchanger 121, 121': Upper body

122, 122 ': lower body 130: heat exchanger

G: gap

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a schematic view showing a condensing gas boiler provided with a heat exchanger according to the present invention, in which a combustion chamber in which a burner 102 for igniting and combusting a gas supplied to an upper portion of a boiler case 100 is installed and combustion is performed below the combustion chamber ( 103) A heat exchanger 130 including a main heat exchanger 110 and an auxiliary heat exchanger 120 having a plurality of heat dissipation fins 104 and 104 'coupled to an outer circumferential surface thereof is arranged at regular intervals. However, the auxiliary heat exchanger 120 indicates that the auxiliary heat exchanger 120 is equally divided and divided into the upper body 121 and the lower body 122 so that a predetermined gap G is generated in the middle.

Figure 4 is an enlarged cross-sectional view showing an auxiliary heat exchanger of the heat exchanger according to the present invention, the upper body 121 and the heat exchanger pipe 105 is a plurality of heat dissipation fins 104 are tightly coupled to the outer peripheral surface at equal intervals in the horizontal direction and It shows the secondary heat exchanger 120 made of a lower body 122 provided to form a predetermined gap (G) below.

At this time, the heat dissipation fins 104 coupled to the outer circumferential surface of the heat exchange pipe 105 are each formed of an independent body in a disc shape.

5 is an enlarged perspective view of part A of FIG. 3, wherein the heat dissipation fins are formed on the outer circumferential surface of the heat exchange pipe 105 of the main heat exchanger 110 and the auxiliary heat exchanger 120, respectively, each having a separate entity ( 104 is shown to be coupled at regular intervals.

At this time, the heat radiation fins 104 formed on the heat exchange pipe 105 are each composed of a separate entity in order to remove unnecessary heat transfer area in the heat exchange.

6 is a schematic view showing another embodiment of the heat dissipation fin of the heat exchanger according to the present invention, in which the heat dissipation fin 104 ″ coupled to the outer circumferential surface of the upper body 121 and the lower body 122 of the auxiliary heat exchanger 120 is integrated. It consists of, but the upper and lower body (121, 122) in the middle portion of the predetermined gap (G) is formed in the transverse direction.

7 is a schematic view showing another embodiment of a heat exchanger according to the present invention, in which a burner 102 for igniting and combusting a gas supplied to an upper portion of a boiler case 100 is installed, and a combustion chamber is burned below. The heat exchange pipe 105 having a plurality of heat dissipation fins 104 'coupled to the outer circumferential surface thereof is disposed below the main heat exchanger 110' and the auxiliary heat exchanger 120 ', which are arranged at regular intervals. However, the main heat exchanger 110 ′ represents the heat exchanger 130 divided into equal parts and divided into the upper body 121 ′ and the lower body 122 ′ so that a predetermined gap G is generated in the middle.

Referring to the use state of the present invention as follows.

As shown in FIGS. 3 to 5, a heat exchange pipe 105 having a plurality of heat dissipation fins 104 coupled to an outer circumferential surface thereof is spaced apart from the main heat exchanger 110 and the auxiliary heat exchanger 120 by a predetermined distance. The auxiliary heat exchanger 120 has a heat exchanger 130 divided into equal parts and divided into an upper body 121 and a lower body 122 so that a predetermined gap G is generated in the middle of the boiler case 100. When the gas boiler is driven for heating and hot water supply with a condensing gas boiler, which is insulated from the burner 102 under a predetermined distance, the gas supplied by the burner 102 is ignited. As a result, combustion occurs in the combustion chamber 103.

In this way, as the gas is burned, heat is applied to the heat exchanger 130 installed below the heat exchanger, so that heat exchange is made to the heating water circulated and supplied to the heat exchange pipe 105 by the heat dissipation fin 104. The heat is firstly absorbed by the heat exchanger 110 and heat exchange of the heating water circulated and supplied through the heat exchange pipe 105 of the main heat exchanger 110 is performed by the auxiliary heat exchanger 120 installed below. The latent heat and the latent heat of condensation are absorbed by the heat exchange.

At this time, since the latent heat and the latent heat of condensation heat exchange part 120 is equally divided and divided into the upper body 121 and the lower body 122 while the predetermined gap G is maintained, endothermic secondary heat is absorbed. In the heat exchange, heat exchange is performed by the first stage endothermic by the upper body 121 and heat exchange by the second stage endothermic by the lower body 122, thereby minimizing the amount of heat released and lost to the outside, resulting in high thermal efficiency. By the gap G formed between the upper body 121 and the lower body 122, in endothermic heat exchange and heat exchange, the ventilation for exhausting the exhaust gas generated during combustion and supplying the air required for combustion is made smoothly. Therefore, it is possible to increase the combustion rate by improving the exhaustability and combustibility to obtain the maximum calorie value with minimum combustion, and to improve the combustibility, to suppress the generation of nitrogen oxides (NOx) contained in the exhaust gas generated during combustion. This would've caused that to prevent corrosion.

6 and 7, the heat dissipation fins 104 "coupled to the outer circumferential surface of the upper body 121 and the lower body 122 of the auxiliary heat exchanger 120 are integrally formed. The auxiliary heat exchanger 110 ′ may be formed such that a predetermined gap G is formed in the middle of the lower bodies 121 and 122 in the transverse direction (see FIG. 6), or the heat exchanger 110 ′ is primarily heat exchanged by ignition and combustion of gas. Like the heat exchanger 120, if the upper and lower bodies 121 'and 122' are equally divided and divided so as to generate a predetermined gap, the heat absorbing and heat exchange is performed in one step by the upper body 121 'during the first heat exchange. After the end body is endothermic and heat exchanged in two stages by the lower body 122 ′, the secondary heat exchange may be performed by the auxiliary heat exchanger 120 ′ installed below.

As such, the main heat exchanger 110, 110 ′ or the auxiliary heat exchanger 120, 120 ′ of the heat exchanger 130 in which the heat exchange is performed to maintain the high temperature of the heating water for heating and hot water supply may have a predetermined gap G. ) Is divided into upper and lower bodies 121 and 121 'and lower and lower bodies 122 and 122' so as to have a two-stage structure to improve combustibility and exhaustability, and to minimize the amount of heat released and lost to the outside. will be.

As such, by using a heat exchanger having a two-stage structure according to the present invention, the latent heat and condensation latent heat during heat exchange can be efficiently absorbed as well as the harmful components contained in the exhaust gas generated during combustion by improving the exhaustability and combustibility. Corrosion can be suppressed by reducing the generation of NOx, and heat efficiency can be increased by reducing cooling phenomenon by reducing the unnecessary heat transfer area of the heat sink fins where endothermic heat is generated, so that maximum thermal energy can be obtained with the least amount of fuel. It works.

Claims (3)

In the heat exchanger of the condensing gas boiler consisting of a main heat exchanger 110 and an auxiliary heat exchanger 120 for absorbing heat generated by the ignition and combustion of the burner 102 to heat the heating water for heating and hot water supply, The auxiliary heat exchanger 120 is divided into equal parts and divided into upper and lower bodies 121 and 122 so that a predetermined gap G is generated in the middle, and a heat dissipation fin 104 ′ composed of an independent body is coupled to an outer circumferential surface thereof. Heat exchanger structure of condensing gas boiler. The heat dissipation fin 104 "of claim 1, wherein the heat dissipation fins 104" are formed integrally with the outer circumferential surface of the upper body 121 and the lower body 122 of the auxiliary heat exchanger 120, and a predetermined gap G is formed in the transverse direction in the middle portion. Heat exchanger structure of the condensing gas boiler, characterized in that coupled. The heat exchanger (130) according to claim 1, wherein the heat exchanger (130) and the auxiliary heat exchanger (120 ') are divided into equal parts and divided into upper and lower bodies (121', 122 ') to have a predetermined gap (G). Heat exchanger structure of the condensing gas boiler, characterized in that consisting of.