KR100257573B1 - Heat exchanger of gas boiler - Google Patents

Heat exchanger of gas boiler Download PDF

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Publication number
KR100257573B1
KR100257573B1 KR1019980005535A KR19980005535A KR100257573B1 KR 100257573 B1 KR100257573 B1 KR 100257573B1 KR 1019980005535 A KR1019980005535 A KR 1019980005535A KR 19980005535 A KR19980005535 A KR 19980005535A KR 100257573 B1 KR100257573 B1 KR 100257573B1
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South Korea
Prior art keywords
heat
heat exchanger
sensible
latent
sensible heat
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KR1019980005535A
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Korean (ko)
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KR19990070599A (en
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오동민
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김철병
주식회사경동보일러
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Priority to KR1019980005535A priority Critical patent/KR100257573B1/en
Publication of KR19990070599A publication Critical patent/KR19990070599A/en
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Publication of KR100257573B1 publication Critical patent/KR100257573B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/41—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes in serpentine form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

PURPOSE: A heat exchanger of double structure is provided to save energy by integrally using an upper sensible heat exchanger and a lower latent heat exchanger. CONSTITUTION: A heat exchanger comprises a sensible heat exchanging portion(1) to absorb combusted sensible heat from a burner by composing of a fin of sensible heat portion(3) to absorb the sensible heat by brazing around a heat exchanging pipe(9) and the heat exchanging pipe(9) to transfer the sensible heat from the fin(3) to a heat medium; and a latent heat exchanging portion(2) to absorb latent heat of the sensible heat and condensed latent heat by composing of a fin of latent heat portion(4) to absorb the latent heat by brazing around a heat exchanging pipe and the heat exchanging pipe to transfer latent heat from the fin(4) to the heat medium. Thereby, the thermal conductivity and the thermal absorption property are optimized and the corrosion resistance is secured.

Description

콘덴싱가스보일러용 이중구조 열교환기Dual structure heat exchanger for condensing gas boiler

본 발명은 콘덴싱가스보일러에 있어 열효율을 향상시킬 수 있는 이중구조 열교환기에 관한 것으로, 더욱 상세하게는 상부의 현열 열교환부와 하부의 잠열 열교환부를 일체화시켜 사용하게 되므로 가스보일러에서 배기가스에 의해 외부로 방출되어 손실되던 에너지를 이용하여 에너지의 절약을 기할 수 있는 콘덴싱가스보일러용 이중구조 열교환기에 관한 것이다.The present invention relates to a dual-structure heat exchanger that can improve the thermal efficiency in the condensing gas boiler, and more particularly, the sensible heat exchanger of the upper portion and the latent heat exchanger of the lower portion is used to integrate the exhaust gas from the gas boiler to the outside. The present invention relates to a dual structure heat exchanger for condensing gas boilers, which can save energy by using energy released and lost.

일반적으로, 가정용 온수보일러중 가스보일러는 가스공급관을 통과하여 공급된 가스가 점화트랜스에 의해 메인버너를 통해 점화하도록 되어 있고, 또 열교환장치가 설치되어 있어 급수 및 난방배관을 통해 옥상수조나 온수순환펌프등이 설치되어 있다. 여기서, 열교환장치는 온도가 다른 2개의 유체를 전열판을 사이에 두고 흐르게하여 고온의 유체가 가진 열을 저온의 유체로 전달하는 장치이다.In general, the gas boiler of the domestic hot water boiler is to ignite the gas supplied through the gas supply pipe through the main burner by the ignition transformer, and the heat exchanger is installed, so that the rooftop water tank or hot water circulation is Pumps are installed. Here, the heat exchanger is a device that transfers the heat of the high-temperature fluid to the low-temperature fluid by flowing two fluids of different temperature across the heat transfer plate.

그런데, 통상적으로 가스보일러의 열효율은 약 75% - 80% 정도이고, 나머지 20% - 25%는 배기가스에 의한 손실인 것이다. 따라서 배기가스가 가지고 나가는 열을 회수할 수 있다. 이 배기가스가 가지고 나가는 열을 회수하는 방법중의 하나가 콘덴싱 열교환기술인데, 상기 배기가스가 나가는 통로에 재생 열교환기를 설치하여 배기가스를 응축시켜 열을 회수하므로 열손실을 최소화하는 것이다. 이렇게 하려면 콘덴싱 열교환기는 몇가지 조건을 갖추어야 하는데 가장 문제가 되는 부분이 응축시 발생하는 산성기를 가진 응축수 및 가스 연료 연소시 발생하는 배기가스 성분중의 황산화물, 질소산화물 등에 의한 열교환기 구성부의 부식현상을 방지하는 것이다.By the way, the thermal efficiency of the gas boiler is typically about 75%-80%, the remaining 20%-25% is the loss by the exhaust gas. Therefore, it is possible to recover the heat carried by the exhaust gas. One of the methods of recovering the heat taken out by the exhaust gas is a condensing heat exchange technology. A heat exchanger is installed in a passage through which the exhaust gas exits to condense the exhaust gas to recover heat, thereby minimizing heat loss. To do this, the condensing heat exchanger must meet several conditions. The most problematic part is the corrosion of heat exchanger components due to sulfur oxides and nitrogen oxides in the condensate with acidic groups generated during condensation and the exhaust gas components generated during combustion of gas fuel. To prevent.

즉, 대부분의 콘덴싱 열교환기는 제작상의 이유로 일체형으로 구성되어 있는 관계로 열교환기를 구성하는 각 부의 재질을 동일한 재질로 구성한다. 그런데, 상기 열교환기의 내부에 열매체가 흐르는 열교환파이프의 구성회로가 아래로부터 순차적으로 구성되어 있으므로, 현열부에서는 배기가스의 온도가 낮아져 응축이 발생할 수 있어 내식성의 재질을 사용하지 않을 경우에는 부식이 발생된다는 결점이 있다. 그리고, 상기 일체형으로 된 열교환기에 있어서, 잠열회수시 발생하는 PH 3 - 4의 산성기를 가지는 응축수 및 연소시 발생하는 배기가스 성분중 황산화물, 질소산화물 등에 의한 열교환기 구성부의 내식성을 확보하기 위하여 내식성을 가진 재질인 알루미늄 합금 또는 스테인레스 등의 재질로 열교환기를 일체화시킨다.That is, most of the condensing heat exchanger is composed of a single material for manufacturing reasons, so the material of each part constituting the heat exchanger is composed of the same material. However, since the constituent circuit of the heat exchanger pipe in which the heat medium flows inside the heat exchanger is sequentially formed from below, the temperature of the exhaust gas is lowered in the sensible heat part, and condensation may occur. There is a drawback that it occurs. In the integrated heat exchanger, corrosion resistance is ensured to ensure corrosion resistance of the heat exchanger components by sulfur oxides and nitrogen oxides in the condensed water having an acid group of pH 3-4 generated during latent heat recovery and the exhaust gas components generated during combustion. The heat exchanger is integrated with a material such as aluminum alloy or stainless steel.

따라서, 상기한 바와 같이 내식성을 가진 재질인 알루미늄 합금 또는 스테인레스 등의 재질로 열교환기를 일체화시켜 구성하므로서, 열교환기의 크기가 커지고 무게가 육중해져 가정용 가스보일러에서의 콤팩트화를 저해한다.Therefore, the heat exchanger is integrated with a material such as aluminum alloy or stainless steel, which is a material having corrosion resistance as described above, thereby increasing the size and weight of the heat exchanger, thereby inhibiting compactness in the domestic gas boiler.

또한, 알루미늄 재질의 경우에는 용접가공이 어려워져서 주물 및 기계가공에 의한 제작으로 제작비의 상승 및 구조의 복잡함을 가져오는 한편, 스테인레스 재질인 경우에는 기계 가공성이 어렵고 용접 또한 고도의 기술을 필요로하여 제작상의 어려운 문제점이 있었다.In addition, in the case of aluminum material, the welding process becomes difficult, and the production by casting and machining brings about an increase in the manufacturing cost and the complexity of the structure.In the case of the stainless material, the machinability is difficult and the welding also requires high technology. There was a difficult problem in production.

본 발명은 상기와 같은 종래의 열교환기 구성부가 갖고 있는 부식현상의 결점을 해소하기 위해 발명한 것으로, 콘덴싱 열교환부를 스테인레스 재질로 구성하고 열전도도 및 열흡수율을 최대로 하기 위하여 현열 열교환부를 동재질로 구성하고 이 현열 열교환부가 노점 온도이상을 유지할 수 있도록 열교환회로를 구성한 콘덴싱가스보일러용 이중구조 열교환기를 제공함에 그 목적이 있다.The present invention has been invented to solve the corrosion problems of the conventional heat exchanger components as described above, the condensing heat exchanger is made of stainless material and the sensible heat exchanger is made of the same material to maximize the thermal conductivity and heat absorption rate It is an object of the present invention to provide a dual structure heat exchanger for condensing gas boilers in which heat exchange circuits are constructed so that the sensible heat exchanger can maintain a dew point temperature or more.

제1도는 본 발명의 실시예에 관한 콘덴싱가스보일러용 이중구조 열교환기를 도시해 놓은 사시도.1 is a perspective view showing a dual structure heat exchanger for a condensing gas boiler according to an embodiment of the present invention.

제2도는 본 발명의 콘덴싱가스보일러용 이중구조 열교환기를 설명하기 위한 구성도.2 is a configuration diagram for explaining a dual structure heat exchanger for a condensing gas boiler of the present invention.

제3도는 제2도에 도시된 콘덴싱가스보일러용 이중구조 열교환기를 작동상태를 나타낸 도면.3 is a view showing an operating state of the dual structure heat exchanger for the condensing gas boiler shown in FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 현열 열교환부 2 : 잠열 열교환부1: sensible heat exchanger 2: latent heat exchanger

3 :현열부 핀 4. 잠열부 핀3: heat-sensing part pin 4.

5 : 열교환 파이프 6 : 송풍기5: heat exchange pipe 6: blower

7 : 송풍기모터 8 : 버너7: blower motor 8: burner

상기 목적을 달성하기 위한 본 발명의 콘덴싱가스보일러용 이중구조 열교환기는, 상하 배열된 열교환파이프(9)의 둘레에 브레이징 용접되어 현열을 흡수하는 현열부 핀(3)과 내부에 열매체가 흐르고 외부의 현열부 핀(3)으로부터 현열을 흡수하여 열매체에 전달하는 열교환파이프(9)로 구성되어 버너(8)에서 발생한 연소 현열을 흡수하는 상부의 현열 열교환부(1)와, 상하 배열된 열교환파이프(10)의 둘레에 브레이징 용접되어 잠열을 흡수하는 잠열부 핀(4)과 내부에 열매체가 흐르고 외부의 잠열부 핀(4)으로부터 잠열을 흡수하여 열매체에 전달하는 열교환파이프(10)로 구성되어 상기 현열 열교환부(1)에서 열교환을 마친 현열의 잔열 및 응축시 발생하는 응축 잠열을 흡수하는 하부의 잠열 열교환부(2)로 구비된 것을그 특징으로 한다.The dual structure heat exchanger for condensing gas boilers of the present invention for achieving the above object is a sensible heat fin (3) for absorbing sensible heat by brazing welding around the heat exchange pipe (9) arranged up and down and the heat medium flows inside and An upper sensible heat exchanger (1) configured to absorb sensible heat from the sensible heat fin (3) and transfer it to the heat medium and absorb the combustion sensible heat generated by the burner (8); 10) and a heat-transfer pipe 10 for brazing welding to absorb latent heat, and a heat medium flows therein, and a heat-transfer pipe 10 for absorbing latent heat from an external latent heat part pin 4 and transferring it to the heat medium. The sensible heat exchanger 1 is characterized in that it is provided with a latent heat exchanger (2) for absorbing the residual heat of sensible heat and the latent heat of condensation generated during condensation.

이하, 본 발명의 실시예를 예시도면에 의거하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명의 실시예에 관한 콘덴싱가스보일러용 이중구조 열교환기를 도시해 놓은 사시도로서, 본 발명은 콘덴싱가스보일러에 있어 열효율을 향상시킬 수 있는 이중구조 열교환기인 바, 이는 상부의 현열 열교환부(1)와 하부의 잠열 열교환부(2)를 일체화시켜 사용하게 되므로 가스보일러에서 배기가스에 의해 외부로 방출되어 손실되던 에너지를 이용하여 에너지의 절약을 기할 수 있도록 구성되어 있다.1 is a perspective view showing a dual structure heat exchanger for a condensing gas boiler according to an embodiment of the present invention, the present invention is a double structure heat exchanger that can improve the thermal efficiency in the condensing gas boiler, the upper sensible heat exchanger Since the (1) and the latent heat exchanger (2) in the lower portion are used together, it is configured to save energy by using the energy lost to the outside by the exhaust gas from the gas boiler.

먼저, 상기 상부의 현열 열교환부(1)는 버너(8)에서 발생한 연소 현열을 흡수하게 되는 바, 이는 상하 배열된 열교환파이프(9)의 둘레에 브레이징 용접되어 현열을 흡수하는 현열부 핀(3)과 내부에 열매체가 흐르고 외부의 현열부 핀(3)으로부터 현열을 흡수하여 열매체에 전달하는 열교환파이프(9)로 구성되는 한편 동브레이징 가공에 의해 제작된다.First, the upper sensible heat exchanger 1 absorbs the combustion sensible heat generated from the burner 8, which is a sensible heat fin 3 that absorbs sensible heat by brazing around the heat exchange pipe 9 arranged up and down. And heat exchange pipe (9) which absorbs sensible heat from the external heat-sensing part fin (3) and transmits it to the heat medium, while being produced by copper brazing.

상기 하부의 잠열 열교환부(2)는 상기 현열 열교환부(1)에서 열교환을 마친 현열의 잔열 및 응축시 발생하는 응축 잠열을 흡수하게 되는 바, 이는 상하 배열된 열교환파이프(10)의 둘레에 브레이징 용접되어 잠열을 흡수하는 잠열부 핀(4)과 내부에 열매체가 흐르고 외부의 잠열부 핀(4)으로부터 잠열을 흡수하여 열매체에 전달하는 열교환파이프(10)로 구성되는 한편 스테인레스 가공에 의해 제작된다.The lower latent heat exchanger (2) absorbs the residual heat of the sensible heat that has completed heat exchange in the sensible heat exchanger (1) and the latent heat of condensation generated during condensation, which is brazed around the heat exchange pipe (10) arranged up and down. It consists of a latent heat sink fin (4) welded to absorb latent heat and a heat exchanger pipe (10) which absorbs latent heat from an external latent heat fin (4) and transfers it to the heat medium. .

따라서, 본 발명의 콘덴싱가스보일러용 이중구조 열교환기는 버너 연소시 발생되는 연소열을 흡수하여 열매체에 전달하는 장치이므로 상부의 현열 열교환부(1)와 하부의 잠열 열교환부(2)로서 2중으로 구성하여, 현열을 흡수하는 현열 열교환부(1)는 동으로 해서 열전도도 및 열흡수율을 최적으로 확보하고, 잠열을 흡수하는 잠열 열교환부(2)는 스테인레스로 해서 응축수 및 연소 배기가스성분중 황산화물, 질소 산화물 등에 의한 부식으로부터 내식성을 확보할 수 있다. 상기 현열 열교환부(1)위로는 동재질의 연소실 열교환파이프(5)이 감겨져 있다.Therefore, the dual structure heat exchanger for condensing gas boiler of the present invention absorbs the combustion heat generated during burner combustion and transfers it to the heat medium, so that the double heat exchanger 1 is configured as a sensible heat exchanger 1 at the top and a latent heat exchanger 2 at the bottom. The sensible heat exchanger 1 for absorbing sensible heat is made of copper to optimally secure thermal conductivity and heat absorption rate, and the latent heat exchanger 2 for absorbing latent heat is made of stainless oxides of condensate and combustion exhaust gas components. Corrosion resistance can be ensured from corrosion by nitrogen oxides or the like. The combustion chamber heat exchange pipe 5 of the same material is wound on the sensible heat exchanger 1.

제2도는 본 발명의 콘덴싱가스보일러용 이중구조 열교환기를 설명하기 위한 구성도로서, 제1도와 같이 상부의 현열 열교환부(1)와 하부의 잠열 열교환부(2)로서 2중으로 구성하는 콘덴싱 열교환기는 연소용 가스 및 공기를 연소 최적조건으로 혼합하여 연소시키는 버너(8), 송풍기모터(7) 및 연소에 필요한 연소용 공기를 공급하고 연소가 되어 발생된 배기가스를 외부로 배출토록 하는 송풍기(6)와 연결되는 열교환구성도인 것이다. 그리고, 버너(8)와 열교환부(1)사이의 연소실(11)는 연소실 열교환파이프(5)이 감겨져 있고, 상기 버너(8)에 가스노즐(12)이 설치되어 가스유입이 되고 있다.2 is a configuration diagram for explaining the dual structure heat exchanger for condensing gas boiler of the present invention, the condensing heat exchanger composed of double as the upper sensible heat exchanger 1 and the latent heat exchanger 2 as shown in FIG. A burner (8) for mixing and combusting combustion gas and air under combustion optimum conditions, a blower motor (7), and a blower for supplying combustion air for combustion and for exhausting the exhaust gas generated by combustion (6). It is a heat exchange diagram connected to). In the combustion chamber 11 between the burner 8 and the heat exchanger 1, the combustion chamber heat exchange pipe 5 is wound, and a gas nozzle 12 is installed in the burner 8 to supply gas.

즉, 버너(8)에서 연소시 발생한 700 - 1200℃의 고온을 흡수하기 위하여 열전도도가 높은 동재질로 구성된 현열 열교환부(1)와, 이 현열 열교환부(1)에서 열교환을 마치고 나온 130 - 200℃의 현열의 잔열 및 응축시 발생하는 응축열을 흡수하기 위하여 노점온도 이하의 조건에서 내식 성능을 가지는 스테인레스 재질로 구성된 잠열 열교환부(2)로 구성되어져 있으며, 각각 현열 열교환부(1)와 잠열 열교환부(2)는 서로 독립된 구조로 제작되어 시스템 구성시 조립되어지는 구조인 것이다.That is, in order to absorb the high temperature of 700-1200 ° C generated during combustion in the burner 8, the sensible heat exchanger 1 made of the same high thermal conductivity material and the sensible heat exchanger 1 having completed heat exchange in the sensible heat exchanger 1 It consists of a latent heat exchanger (2) made of stainless material having corrosion resistance under the dew point temperature to absorb residual heat of sensible heat at 200 ° C and condensation heat generated during condensation, respectively. The heat exchange unit 2 is a structure that is manufactured in a structure independent from each other and assembled during system configuration.

상기 현열 열교환부(1)는 버너(8)면에서 접하는 부분에 연소실(11)이 위치하고, 이 연소실(11) 주위에는 버너연소시 발생하는 고온(700 - 1200℃)의 연소가스에 의한 벽면에서의 방열 열손실 및 벽면의 과열을 방지하기 위하여 열교환파이프(5)가 설치되어 있으며, 하부면, 즉 잠열 열교환부(2)와 접하는 곳에 열교환파이프(9)가 설치되어 있고, 이 열교환파이프(9)주위에는 다수의 현열부핀(3)이 브레이징 용접되어 버너 연소실 발생되는 현열(연소열)을 흡수한다.The sensible heat exchanger 1 is located in the combustion chamber 11 in contact with the burner (8) surface, around the combustion chamber 11 in the wall surface of the combustion gas of the high temperature (700-1200 ℃) generated during burner combustion In order to prevent heat dissipation heat loss and overheating of the wall surface, a heat exchange pipe 5 is provided, and a heat exchange pipe 9 is provided at the lower surface, that is, in contact with the latent heat exchanger 2, and the heat exchange pipe 9 is provided. A large number of sensible heat part pins 3 are brazed and welded to absorb sensible heat (burning heat) generated in a burner combustion chamber.

상기 잠열 열교환부(2)는 현열 열교환부(1)와 맞닿는 곳에 마찬가지로 열교환파이프(10)가 설치되고 주위에는 잠열부핀(4)이 설치되어, 현열 열교환부(1)에서 열교환을 마친 잔열의 현열 및 응축시 발생하는 응축잠열을 흡수하고 응축과정에서 발생된 응축수는 하부의 배기덕트(13)를 통하여 외부로 배출된다. 이 배기덕트(13)에는 배기온도가 30 - 80℃ 이다.In the latent heat exchanger 2, the heat exchanger pipe 10 is installed in the same contact with the sensible heat exchanger 1 and the latent heat buoy 4 is installed around the sensible heat exchanger. And it absorbs the latent heat of condensation generated during condensation and the condensate generated in the condensation process is discharged to the outside through the exhaust duct 13 of the lower portion. The exhaust duct 13 has an exhaust temperature of 30 to 80 ° C.

이상과 같이 구성되는 본 발명의 콘덴싱가스보일러용 이중구조 열교환기는 현열 열교환부(1)가 동재질로 이루어지고 잠열 열교환부(2)가 스테인레스 재질로 이루어져, 열매체의 열교환 회로구성이 찬 열매체가 잠열 열교환부(2)의 하부로 인입되어 순차적으로 열교환을 하여 응축에 의한 잠열을 흡수하고, 현열 열교환부(1)의 연소실(11) 상부 열교환파이프(5)로 들어가 열교환을 하여 현열을 흡수하고, 다시 현열 열교환부(1)의 현열부핀(3)의 열교환파이프(9)를 거치면서 현열을 흡수토록 회로를 구성하여, 동재질로 구성된 현열 열교환부(1)가 노점온도 이상이 되도록 하여 응축에 의한 부식으로부터 내식성을 확보한 것이다.The dual structure heat exchanger for condensing gas boilers of the present invention configured as described above is made of the same material as the sensible heat exchanger 1 and the latent heat exchanger 2 is made of stainless steel. It enters into the lower part of the heat exchanger 2 and sequentially exchanges heat to absorb latent heat due to condensation, enters the upper heat exchange pipe 5 of the combustion chamber 11 of the sensible heat exchanger 1 and performs heat exchange to absorb sensible heat, The circuit is configured to absorb sensible heat while passing through the heat exchange pipe 9 of the sensible heat exchanger pin 3 of the sensible heat exchanger 1 so that the sensible heat exchanger 1 made of the same material is at or above the dew point temperature. Corrosion resistance is secured from corrosion.

이는 열매체가 흐르는 열교환파이프의 회로를 제3도에 도시된 바와 같이, 잠열 열교환부(2)를 아래로부터 순차적으로 현열 열교환부(1)의 상부 연소실(11)벽면에서부터 시작하여 현열흡수 열교환파이프의 상부로 들어가 하부로 나오므로하여, 현열 열교환부(1)와 잠열 열교환부(2)가 맞닿는 부분의 배기가스 온도가 노점온도 이상을 유지하게 되어 현열 열교환부(1)를 동재질로 제작하여도 부식으로부터 내식성을 확보하고 열전도도 및 열 흡수율을 최대로 확보하여 현열을 흡수하며, 현열 열교환부(1)는 스테인레스 재질로 응축시 발생하는 잠열을 흡수하고 내식성을 확보한다.As shown in FIG. 3, the circuit of the heat exchanger pipe through which the heat medium flows, starting with the latent heat exchanger 2 from the wall of the upper combustion chamber 11 of the sensible heat exchanger 1 sequentially from below, Since it enters the upper part and exits the lower part, even if the exhaust gas temperature of the part where the sensible heat exchange part 1 and the latent heat exchange part 2 abut is maintained above the dew point temperature, the sensible heat exchange part 1 may be made of the same material. It secures corrosion resistance from corrosion and secures maximum thermal conductivity and heat absorption to absorb sensible heat. The sensible heat exchanger 1 absorbs latent heat generated when condensing with stainless steel and secures corrosion resistance.

따라서, 현열 열교환부(1)와 잠열 열교환부(2)로 이루어진 이중구조의 콘덴싱 열교환기의 열교환파이프(5, 9, 10)내부의 열매체(통상 물) 흐름순서, 즉 열교환 순서는 동재질의 현열 열교환부(1)(현열 열교환부(1)와 맞닿는 곳)를 열교환시 발생할 수 있는 부식으로부터 보호하기 위하여 노점온도 이상으로 유지하도록 회로를 구성한다.Therefore, the heat medium (usually water) flow order inside the heat exchange pipes 5, 9, and 10 of the dual structure condensing heat exchanger including the sensible heat exchanger 1 and the latent heat exchanger 2 is made of the same material. The circuit is configured to maintain the sensible heat exchanger 1 (where it is in contact with the sensible heat exchanger 1) above the dew point temperature in order to protect it from corrosion that may occur during heat exchange.

즉, 찬열매체는 잠열 열교환부(2)의 하부 열교환파이프(10)인 파이프(a)로 들어오고, 순차적으로 통과하여 파이프(g)를 거친 열매체는 현열 열교환부(1) 상부 연소실(11)주위에 브레이징 용접으로 감겨진 열교환파이프(5)인 파이프(h-k)에서 현열을 흡수하고, 현열 열교환부(1)의 열교환파이프(9)인 파이프(1-r)를 통하여 열교환을 함으로써 뜨거운 열매체가 된다.That is, the cold heat medium enters the pipe (a), which is the lower heat exchange pipe (10) of the latent heat exchanger (2), and the heat medium passing through the pipe (g) sequentially passes through the sensible heat exchanger (1) upper combustion chamber (11). By absorbing sensible heat from the pipe (hk), which is a heat exchanger pipe (5) wound around by brazing welding, and heat-exchanging through the pipe (1-r), which is a heat exchanger pipe (9) of the sensible heat exchanger (1), the hot heat medium do.

이때 현열 열교환부(1)하단, 즉 잠열 열교환부(2) 상단과 맞닿는 곳은 열교환시 배기온도가 130 - 200℃가 되어, 노점온도 이상을 유지하게 되므로 부식으로부터 안전할 수 있다.At this time, the lower end of the sensible heat exchanger 1, that is, the contact with the upper end of the latent heat exchanger 2 becomes an exhaust temperature of 130-200 ℃ during heat exchange, it can be safe from corrosion because it maintains more than the dew point temperature.

이상 설명한 바와 같이 본 발명에 의하면, 종래의 열교환기 구성부가 갖고 있는 부식현상을 방지하기 위하여 콘덴싱 열교환부를 스테인레스 재질로 구성하고 열전도도 및 열흡수율을 최대로 하기 위하여 현열부를 동재질로 구성하고 이 현열부가 노점 온도이상을 유지할 수 있도록 열교환회로를 구성한 콘덴싱가스보일러용 이중구조 열교환기를 제공할 수 있다.As described above, according to the present invention, in order to prevent corrosion phenomenon of the conventional heat exchanger components, the condensing heat exchanger is made of stainless material, and the sensible heat part is made of the same material to maximize the thermal conductivity and the heat absorption rate. A dual structure heat exchanger for condensing gas boilers having a heat exchange circuit configured to maintain an additional dew point temperature may be provided.

또한, 본 발명의 콘덴싱가스보일러용 이중구조 열교환기는 콘덴싱 열교환기를 실용화함으로써 가스보일러에 있어 배기가스에 의해 외부로 방출되어 손실되고 있던 에너지를 이용하게 되어 에너지절약을 기할 수 있는 장점이 있다.In addition, the dual structure heat exchanger for the condensing gas boiler of the present invention has the advantage of using energy that is discharged to the outside by the exhaust gas and lost in the gas boiler by making the condensing heat exchanger practical.

본 발명은 에너지 사용효율을 높힐 수 있으므로 에너지 사용량이 감소되어 환경 유해물질의 배출을 줄일 수 있다.Since the present invention can increase the energy use efficiency, the energy consumption can be reduced to reduce the emission of environmentally harmful substances.

Claims (2)

상하 배열된 열교환파이프(9)의 둘레에 브레이징 용접되어 현열을 흡수하는 현열부 핀(3)과 내부에 열매체가 흐르고 외부의 현열부 핀(3)으로부터 현열을 흡수하여 열매체에 전달하는 열교환파이프(9)로 구성되어 버너(8)에서 발생한 연소 현열을 흡수하는 상부의 현열 열교환부(1)와, 상하 배열된 열교환파이프(10)의 둘레에 브레이징 용접되어 잠열을 흡수하는 잠열부 핀(4)과 내부에 열매체가 흐르고 외부의 잠열부 핀(4)으로부터 잠열을 흡수하여 열매체에 전달하는 열교환파이프(10)로 구성되어 상기 현열 열교환부(1)에서 열교환을 마친 현열의 잔열 및 응축시 발생하는 응축 잠열을 흡수하는 하부의 잠열 열교환부(2)로 구비된 것을 특징으로 하는 콘덴싱가스보일러용 이중구조 열교환기.Brazing welding around the heat exchange pipe (9) arranged up and down and the heat exchanger fin (3) to absorb sensible heat and the heat medium flows inside, and the heat exchanger pipe absorbs sensible heat from the external sensible heat fin (3) and transfers it to the heat medium ( 9) an upper sensible heat exchanger 1 configured to absorb combustion sensible heat generated by the burner 8, and a latent heat part fin 4 for brazing welding absorbing latent heat around the heat exchange pipe 10 arranged up and down. The heat medium flows through the inside and the heat exchange pipe 10 which absorbs latent heat from the external latent heat portion fins 4 and transfers the heat medium to the heat medium. Dual structure heat exchanger for condensing gas boiler, characterized in that provided as a latent heat exchanger (2) of the lower portion to absorb the latent heat of condensation. 현열 열교환부(1)가 동재질로 이루어지고 잠열 열교환부(2)가 스테인레스 재질로 이루어져, 열매체의 열교환 회로구성이 찬 열매체가 잠열 열교환부(2)의하부로 인입되어 순차적으로 열교환을하여 응축에 의한 잠열을 흡수하고, 현열 열교환부(1)의 연소실(11) 상부 열교환파이프(5)로 들어가 열교환을하여 현열을 흡수하고, 다시 현열 열교환부(1)의 현열부핀(3)의 열교환파이프(9)를 거치면서 현열을 흡수토록 회로를 구성하여, 동재질로 구성된 현열 열교환부(1)가 노점온도 이상이 되도록하여 응축에 의한 부식으로부터 내식성을 확보한 것을 특징으로 하는 콘덴싱가스보일러용 이중구조 열교환기.The sensible heat exchanger (1) is made of the same material and the latent heat exchanger (2) is made of stainless material, and the heat medium having the heat exchanger circuit configuration of the heat medium is introduced into the lower part of the latent heat exchanger (2) to sequentially exchange heat to condense Absorbs latent heat, enters the upper heat exchange pipe 5 of the combustion chamber 11 of the sensible heat exchanger 1, performs heat exchange, absorbs sensible heat, and heat exchange pipes of the sensible heat fin 3 of the sensible heat exchanger 1 again. 9) A double structure for condensing gas boilers, comprising a circuit configured to absorb sensible heat and ensuring that the sensible heat exchanger (1) made of the same material is above the dew point temperature to ensure corrosion resistance from corrosion due to condensation. heat transmitter.
KR1019980005535A 1998-02-23 1998-02-23 Heat exchanger of gas boiler KR100257573B1 (en)

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Cited By (2)

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KR100974802B1 (en) 2008-08-25 2010-08-06 주식회사 경동나비엔 Condensing boiler having a function of computing and displaying a quantity of energy saving and method of computing and displaying a quantity of energy saving
KR101046497B1 (en) * 2008-07-28 2011-07-04 주식회사 경동나비엔 Two stage heat exchanger to reduce NOx generation

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KR100392595B1 (en) * 2000-06-28 2003-07-23 주식회사 경동보일러 Condensing type Heat Exchanger of Gas Boiler
KR100361553B1 (en) * 2000-07-18 2002-11-18 주식회사 두발가스엔지니어링 Heat exchanger of gas boiler and method for welding a fin having heat exchanger
KR100353761B1 (en) * 2000-12-26 2002-09-28 주식회사 롯데기공 Heat exchanger structure of condensing gas boiler
KR20020054068A (en) * 2000-12-27 2002-07-06 김진곤 Haet exchanger for gas boiler and manufacture method thereof
KR100747000B1 (en) * 2006-02-17 2007-08-07 (주)귀뚜라미보일러 Heat exchanger and condencing boiler involving the same
KR100813412B1 (en) * 2007-06-13 2008-03-12 인하대학교 산학협력단 The boiler for reducing pollutional material unified with a heat exchange
KR102546693B1 (en) * 2016-07-15 2023-06-22 주식회사 경동나비엔 Structure for preventing damage of heat exchanger components by combustion heat

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Publication number Priority date Publication date Assignee Title
KR101046497B1 (en) * 2008-07-28 2011-07-04 주식회사 경동나비엔 Two stage heat exchanger to reduce NOx generation
KR100974802B1 (en) 2008-08-25 2010-08-06 주식회사 경동나비엔 Condensing boiler having a function of computing and displaying a quantity of energy saving and method of computing and displaying a quantity of energy saving

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