KR100391261B1 - Uptrend Combustion Condensing Type Heat Exchanger of Gas Boiler - Google Patents

Abstract

The present invention adopts a double heat exchanger to prevent the condensed water from directly contacting the copper tube by using an aluminum precursor on the outside of the heat exchanger pipe of the gas boiler heat exchanger pipe, the inside of the copper pipe having a good heat transfer rate, and the latent heat The upper guide, the lower guide and the latent heat exchanger are properly arranged in the unit so that the latent heat exchanger is doubled in the same area in the direction perpendicular to the combustion chamber, and the upstream combustion condensing of the gas boiler which makes the boiler smaller and lighter while maximizing the efficiency of the heat exchanger. Providing anticorrosion heat exchanger.

Description

Uptrend Combustion Condensing Type Heat Exchanger of Gas Boiler

The present invention relates to an upward combustion condensing type heat exchanger of a gas boiler, and more particularly, a burner part, a sensible heat part, and a latent heat part are integrally formed vertically, and the latent heat part can collect condensate while guiding the flow of exhaust gas. It is possible to form a top guide and a lower guide, and a latent heat exchanger in which heat exchange pipes are arranged in multiple rows between the top guide and the bottom guide to maximize heat transfer area, thereby improving heat exchange efficiency, miniaturizing and reducing the weight and It relates to an upward combustion condensing heat exchanger of a gas boiler to ensure corrosion resistance.

In general, heating and hot water boilers used in homes are divided into oil boilers and gas boilers according to the fuel used. Among these, gas boilers with low air pollution and easy use are mainly used, and liquefied natural gas (LNG) is mainly used as the fuel. Gas boilers can be divided into various types according to the control method or sealed state, and can be classified into condensing and non-condensing types according to heat sources for heating the heating water.

Hydrogen in the gaseous fuel, when burned, combines with oxygen to produce water and at the same time dissipate heat, which is converted into water vapor by its own heat. When water turns into water vapor, it takes away heat and when the temperature of the water vapor contained in the exhaust gas is lowered below a certain temperature, it turns back into water and releases the heat taken away. The boiler is a condensing boiler.

Figure 1 is a schematic view showing a conventional condensing boiler of the downward combustion method. As shown, a flame 14 is generated by supplying a predetermined amount of air and gas to the burner 13 by the blowing fan 12, and heat of the flame 14 is transferred to the heat exchanger 15. By exchanging heat, the cold water flowing through the inner pipe is converted into hot water.

In addition, the lower heat exchangers 15 which are not directly exposed to heat are heat-exchanged by contacting the hot exhaust gas, and the condensed water generated by the heat emission of the exhaust gas is discharged to the outside through the drain pipe 16. The exhaust gas lowered below the dew point temperature through heat exchange is discharged to the outside through the exhaust duct 17.

However, the downward combustion condensing boiler has a disadvantage in that the exhaust duct 17 excessively occupies the internal volume of the boiler, which makes it difficult to reduce the weight and compactness, and the exhaust load is excessive, thereby increasing the load of the blower fan 12.

Figure 2 is a schematic view showing a conventional condensing boiler of the upward combustion method. As shown, a flame 14 is generated by supplying a predetermined amount of air and gas to the burner 13 by the blower fan 12, and heat of the flame 14 is transferred to the main heat exchanger 22. The heating water flowing in the inner pipe of the main heat exchanger 22 is made high temperature.

In addition, the exhaust gas contacts and heat exchanges with the subsidiary heat exchanger 23 provided on the flow path of the exhaust duct 17, thereby primarily heating the heating water flowing in the subsidiary heat exchanger 23.

The upward combustion condensing boiler has a problem in that thermal efficiency is lowered by forming a dead zone between the main heat exchanger 22 and the auxiliary heat exchanger 23, in which an exhaust gas emits heat without a special action. .

In addition, the exhaust duct 17 has a structure in which the flow path of the exhaust duct 17 moves out of the combustion chamber and receives a lot of exhaust resistance, and a lot of space is restricted due to the exhaust flue in a limited space.

In the case of the condensing boiler configured to absorb sensible and latent heat, the condensation process is performed inside, so that the latent heat part 300 is in a humid environment, and the humid environment is changed from a gas to a liquid by condensation of water vapor in the combustion exhaust gas. Because.

This change to liquid is called condensate, and this condensate will corrode metals that are not acid resistant. Therefore, it became the biggest problem in the durability of a boiler. In addition, even in the case of copper materials used mostly in heat exchangers that absorb only sensible heat, the thermal conductivity is excellent, but in the condensation condition, the corrosion occurs as described above, and the durability of the heat exchanger is reduced.

In addition, the heat exchanger is made of aluminum material capable of absorbing sensible heat and latent heat and having corrosion resistance. Since the thermal conductivity is lower than that of copper material, it is formed of copper to obtain the same or similar heat quantity as the boiler formed of copper. There was a problem that the size is larger and the weight is heavier than the heat exchanger.

Therefore, in order to compensate for the disadvantage that the size becomes large and the weight becomes heavier, the sensible heat unit 200, which is a heat exchanger that absorbs sensible heat in the heat exchanger, is formed of a copper material having good thermal conductivity, and a heat exchanger that absorbs the latent heat of condensation that is concerned about corrosion. The denial condensation latent heat part 300 is formed of aluminum or stainless material of corrosion resistance, but may be configured in the form of a double structure, but there is a restriction on corrosion prevention in design so that the heat exchange part formed by copper is not placed under condensation conditions. Since the temperature of the portion where the sensible heat portion formed of copper material and the condensation latent heat exchanger made of stainless steel or aluminum contact with the condensation condition does not lie in the condensation condition, the design must be made to maintain the dew point temperature or more, which is difficult to design and has many limitations This occurred.

Therefore, the present invention has been made to solve the above problems, the object of the present invention is to use a heat exchanger pipe of the material of the heat-exchanging pipe of the latent heat exchanger of the gas boiler, the outside of the aluminum roll, the inside of the copper tube having a good heat transfer rate directly Adopt a double heat exchanger to prevent condensate from contacting the copper pipe, and arrange the upper guide, the lower guide and the latent heat exchanger in the latent heat so that the latent heat exchanger is distributed within the same area in the vertical direction with the combustion chamber. The present invention provides a gas-fired upstream condensing heat exchanger for miniaturizing and reducing the boiler while maximizing the efficiency of the heat exchanger.

1 is a schematic view showing a conventional condensing boiler of the downward combustion method.

Figure 2 is a schematic view showing a conventional condensing boiler of the upward combustion method.

3 is a block diagram of a condensing boiler according to the present invention.

Explanation of symbols on the main parts of the drawings

51: burner 52: combustion chamber

53: outer sensible heat pipe 54: heating exit

55: sensible heat exchanger 57: condensate outlet

58: lower guide 60: exhaust port

61: latent heat exchanger 62: heat exchange pipe

63: upper guide 64: latent heat front cover

65: latent heat rear cover 66: heating inlet

67: condensate outlet 100: burner

200: sensible heat portion 300: latent heat portion

The present invention for achieving the above object, the burner portion for generating heat through the combustion of the burner, the sensible heat portion for directly heat-exchanging heat generated by the burner portion through the sensible heat exchanger, and the exhaust through the sensible heat portion Upward combustion condensing method of a gas boiler comprising a latent heat preheating portion of the heating water through a latent heat exchanger provided between the latent heat front cover and the latent heat rear cover using gas, and an exhaust port for discharging the exhaust gas to the outside. In the heat exchanger, the latent heat portion is connected to the lower end of the latent heat front face cover to collect condensate while inducing exhaust gas, and the other side is open to the lower guide and the lower guide to the upper side of the lower guide. It is installed to face a predetermined interval and one side is connected to the top of the latent heat rear cover and the other side to allow the exhaust gas to flow out An open upper guide, a latent heat exchanger provided between the lower guide and the upper guide and arranged in three rows of heat exchange pipes to absorb heat of the exhaust gas, and condensate to guide the condensate collected in the lower guide to the condensation outlet. It provides an upward combustion condensing type heat exchanger of a gas boiler, characterized in that configured as an outlet.

Hereinafter, with reference to the accompanying drawings will be described in detail the upstream condensing type heat exchanger of the gas boiler of the present invention.

3 is a block diagram of a condensing boiler according to the present invention.

As shown, the condensing boiler according to the present invention is a burner unit 100 to generate heat through the combustion of the burner 51 and the heat generated from the burner unit 100 sensible heat exchanger 55 A latent heat exchanger provided between the latent heat unit 200 for directly exchanging heat through the latent heat unit 200 and the latent heat front cover 64 and the latent heat rear cover 65 using exhaust gas passing through the sensible heat unit 200 ( It consists of a latent heat unit 300 for preheating the heating water through the 61, and an exhaust port 60 for discharging the exhaust gas to the outside, the burner unit 100, the sensible heat unit 200 and the latent heat unit 300 Are stacked in the same area.

Of these, the latent heat unit 300 is connected to the lower end of the latent heat front face cover 64 so as to collect condensed water while inducing exhaust gas, and the other side of the lower guide 58 which is open to allow the inflow of exhaust gas. Is formed, the upper guide 63 is installed to face the predetermined interval to the upper side of the lower guide 58, one side is connected to the upper end of the latent heat cover rear cover 65 and the other side is open so that the exhaust gas can flow out It is.

In addition, the latent heat part 300 absorbs heat of exhaust gas passing through the sensible heat part 200 between the lower guide 58 and the upper guide 63 to preheat the heating water. Is provided with a latent heat exchanger (61) arranged in multiple rows, and is composed of a condensate outlet (57) for guiding the condensate collected in the lower guide (58) to the condensate outlet (67).

Due to the installation structure of the upper guide 63 and the lower guide 58 as described above, the exhaust gas flows from the rear upper part of the latent heat part 300 to the latent heat part 300 in front of the lower part, and thus the temperature is lowered. It is possible to prevent the overheating of the 64, and the upper guide 63 and the lower guide 58 are formed to be inclined toward the lower end of the latent heat front cover 64 so that the heat transfer area is increased by the upper guide 63 and the lower guide 58. ) Can be wider than when the horizontal installation, the condensate is naturally collected to the bottom surface of the lower guide 58 can guide the condensate to the condensate outlet 67 through the condensate outlet (57).

At this time, the heat exchange pipe 62 of the latent heat exchanger heat exchanger 61 is configured to be connected to the heat exchange pipe 62 of the same copper column or the heat exchange pipe 62 of the other heat adjacent to each other, Any one of the heat exchange pipe 62 is connected to the heating inlet 66, the other is connected to the sensible heat unit 200 to allow the heating water flow.

In addition, the latent heat front cover 64 and the latent heat rear cover 65 and the upper guide 63 and the lower guide 58 have a dual structure having an air layer therein to prevent heat loss. The latent heat part 300 and the exhaust port 60 may be integrally formed.

In addition, the heat exchange pipe 62 of the latent heat exchanger 61 uses a stainless steel corrugated pipe without a fin, and the heat exchange pipe of the sensible heat exchanger 55 has a copper material inside to prevent corrosion. The pipe is used and the outside is rolled with aluminum.

The heat exchange pipe 62 of the latent heat exchanger 61 and the heat exchange pipe of the sensible heat exchanger 55 use a copper pipe inside to prevent corrosion, and the outside is rolled with aluminum. Use one.

Here, the heat exchanging pipe of the sensible heat exchanger 55 may be used by rolling copper pipe or rolling aluminum pipe, and may use Fin-pipe.

Hereinafter, the operation and effects of the upstream condensing type heat exchanger of the gas boiler according to the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

When the burner 51 of the burner part 100 is operated, combustion occurs in the combustion chamber 52 to generate heat to the sensible heat exchanger 55 through the sensible heat external external pipe 53 wound around the combustion chamber 52. Directly transfer heat, and the exhaust gas generated in the combustion process is discharged to the latent heat unit 300, the exhaust gas is guided by the lower guide 58, the lower guide 58 and the latent heat rear cover 65 It will be gathered into the space between and rises.

Thereafter, the exhaust gas transfers heat while passing through the latent heat exchanger 61 provided between the upper guide 63 and the lower guide 58, and then, between the upper guide 63 and the latent heat front cover 64. It is guided upward through the space and then discharged to the exhaust port 60.

In this process, the condensed water generated on the surface of the latent heat exchanger 61 falls and moves naturally to the bottom through the inclined lower guide 58, and to the condensate outlet 57 formed at one side of the lower guide 58. It is guided and discharged to the condensation outlet 67.

At this time, looking at the circulation of the heating water in the heat transfer process, the heating and cooling water after the heating is introduced into any heat exchange pipe 62 of the latent heat-heat exchanger 61 through the heating inlet 66, While the heat exchange pipe 62 is sequentially moved, it absorbs the latent heat of condensation of the exhaust gas and is preheated while heat exchange.

The heating water absorbing the heat through this process is discharged from any heat exchange pipe 62 of the latent heat exchanger 61 and flows to the sensible heat unit 200 side, and the sensible heat exchanger is wound around the combustion chamber 52. It is introduced into the 55 to directly receive the heat of combustion and discharged to the heating export outlet 54 to heat the area to be heated and flows back into the heating inlet 66 to circulate.

In the above, the latent heat exchanger 61 is illustrated and illustrated as being arranged in three rows, but the object of the present invention is to increase the heat exchange efficiency by arranging the heat exchange pipe 62 in multiple rows. Those skilled in the art will recognize that various modifications and changes can be made without departing from the spirit and scope of the invention.

As described above, according to the upstream condensing type heat exchanger of the gas boiler according to the present invention, in order to maximize the flow of the exhaust gas, condensation of the exhaust gas by means of a latent heat sub-heat exchanger arranged with an upper guide, a lower guide, and a series of pipes. As it absorbs latent heat, it can prevent the waste of energy, and without installing a condensate receiver, the lower guide acts as a flow of exhaust gas and a condensate receiver. Therefore, the product cost is reduced and the product size is reduced. And it is a very useful and effective invention which can realize miniaturization and the heat exchange area of exhaust gas becomes large, and heat exchange efficiency improves.

Claims (11)

A burner unit 100 for generating heat through combustion of the burner 51, a sensible heat unit 200 for directly exchanging heat generated by the burner unit 100 through a sensible heat exchanger 55, and the The latent heat part 300 for preheating the heating water through the latent heat part heat exchanger 61 provided between the latent heat part front cover 64 and the latent part back cover 65 using exhaust gas passing through the sensible heat part 200. In the upstream combustion condensing heat exchanger of the gas boiler composed of an exhaust port 60 for discharging the exhaust gas to the outside, The latent heat unit 300 is connected to a lower end of the latent heat front face cover 64 so as to collect condensed water while inducing exhaust gas and the other side of the lower guide 58 which is open to allow the exhaust gas to flow therein; An upper guide 63 installed at an upper side of the lower guide 58 at a predetermined interval and connected to an upper end of the latent heat-rear rear cover 65 and the other side opened to allow the exhaust gas to flow out; A latent heat exchanger (61) disposed between the lower guide (58) and the upper guide (63) to arrange heat exchange pipes (62) in three rows to absorb heat of exhaust gas; Upward condensing type heat exchanger of the gas boiler, characterized in that consisting of the condensate discharge port 57 to guide the condensate collected in the lower guide (58) to the condensation outlet (67). The heat exchange pipe (62) of the latent heat exchanger (61) is connected to a heat exchange pipe (62) of adjacent copper heat or a heat exchange pipe (62) of adjacent other heat. Upward condensing type heat exchanger of a gas boiler. The upper combustion condensing type heat exchanger of claim 1, wherein the upper guide (63) and the lower guide (58) are inclined to maximize the heat transfer area. The upstream condensing type heat exchanger of claim 1, wherein the latent heat unit and the exhaust port are integrally formed. According to claim 1, The burner unit 100, the sensible heat unit 200 and the latent heat unit 300 is vertically laminated in the vertical combustion condensing type heat exchanger of the gas boiler, characterized in that formed integrally. . The heat exchange pipe 62 of the latent heat exchanger 61 uses a pinless stainless steel corrugated pipe, and the heat exchange pipe of the sensible heat exchanger 55 has a copper inside to prevent corrosion. Iii) Upstream combustion condensing heat exchanger of a gas boiler, characterized in that the pipe is made of aluminum and the outside is rolled with aluminum. 7. The upstream condensing type heat exchanger of a gas boiler according to claim 6, wherein the heat exchange pipe of the sensible heat exchanger (55) is formed by rolling the pipe. 7. The upstream condensing type heat exchanger of a gas boiler according to claim 6, wherein the heat exchange pipe of the sensible heat exchanger (55) is made by rolling an aluminum pipe. 7. The upstream condensing type heat exchanger of a gas boiler according to claim 6, wherein the heat exchange pipe of the sensible heat exchanger (55) uses a fin-pipe. The method of claim 1, wherein any one of the heat exchange pipe 62 is connected to the heating inlet 66, the other is connected to the sensible heat unit 200, the upper combustion condensing of the gas boiler. Anti-corrosion heat exchanger. The latent heat front cover 64 and the latent heat rear cover 65 and the upper guide 63 and the lower guide 58 have a double structure having an air layer therein to prevent heat loss. Upward condensing type heat exchanger of the gas boiler, characterized in that the.