KR200407573Y1 - Hot water supply unit of boiler with double tube heat exchanger - Google Patents

Hot water supply unit of boiler with double tube heat exchanger Download PDF

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Publication number
KR200407573Y1
KR200407573Y1 KR2020050032929U KR20050032929U KR200407573Y1 KR 200407573 Y1 KR200407573 Y1 KR 200407573Y1 KR 2020050032929 U KR2020050032929 U KR 2020050032929U KR 20050032929 U KR20050032929 U KR 20050032929U KR 200407573 Y1 KR200407573 Y1 KR 200407573Y1
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South Korea
Prior art keywords
heat exchanger
hot water
boiler
double
water supply
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KR2020050032929U
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Korean (ko)
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김용범
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주식회사 경동보일러
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Priority to KR2020050032929U priority Critical patent/KR200407573Y1/en
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Publication of KR200407573Y1 publication Critical patent/KR200407573Y1/en
Priority to CNA2006800436298A priority patent/CN101313182A/en
Priority to PCT/KR2006/000899 priority patent/WO2007061159A1/en
Priority to EP06716349A priority patent/EP1957886A1/en
Priority to US12/085,267 priority patent/US20090283057A1/en
Priority to JP2008542220A priority patent/JP2009516819A/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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • 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
    • F24H9/00—Details
    • F24H9/16—Arrangements for water drainage 
    • 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
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/526—Pipes in pipe heat exchangers for sanitary water
    • 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
    • F24H9/00—Details
    • 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
    • F24H9/00—Details
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • 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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Details Of Fluid Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

본 고안은 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 관한 것으로, 더욱 상세하게는 난방 및 온수겸용 보일러에서 온수 유로가 외관으로, 난방 유로가 내관으로 설치된 이중관 열교환기를 사용한 보일러에 있어서 상수도가 단수된 상황에서도 난방 가동을 정상적으로 수행할 수 있는 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 관한 것이다.The present invention relates to a hot water supply device for a boiler equipped with a double tube heat exchanger, and more particularly, in the boiler using a double tube heat exchanger having a heating channel as an inner tube and a heating channel as an inner tube, The present invention relates to a hot water supply device of a boiler having a double tube heat exchanger capable of performing a heating operation normally.

본 고안의 이중관 열교환기가 구비된 보일러의 온수 공급 장치는 연소실의 버너에 의한 연소열이 직접 가해지는 외관과 상기 외관의 내부에 설치되는 내관으로 구성된 이중관 열교환기; 상기 열교환기의 상기 외관으로 물을 공급하는 직수관; 상기 열교환기의 상기 외관으로부터 물이 빠져나가는 온수관;을 포함하여 이루어진 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 있어서, 상기 직수관은 역류 방지변 및 압력 흡수장치를 설치한 것을 특징으로 한다.The hot water supply device of the boiler provided with a double-tube heat exchanger of the present invention is a double-tube heat exchanger consisting of an inner tube installed in the interior of the exterior and the heat directly applied by the burner of the combustion chamber; A direct pipe for supplying water to the external appearance of the heat exchanger; The hot water supply device of the boiler provided with a double-tube heat exchanger comprising a; the hot water pipe is characterized in that the reverse flow prevention valve and the pressure absorbing device is installed.

본 고안에 따른 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 의하면, 역류 방지변 및 압력 흡수장치를 구비함으로써 상수도가 단수된 상황에서도 난방 가동을 정상적으로 수행할 수 있는 효과가 있다.According to the hot water supply device of the boiler with a double-tube heat exchanger according to the present invention, by providing a non-return valve and a pressure absorbing device has an effect that the heating operation can be normally performed even in the situation where the water supply is single.

보일러, 이중관, 열교환기, 역류 방지변, 압력 흡수장치 Boiler, double pipe, heat exchanger, non-return valve, pressure absorber

Description

이중관 열교환기가 구비된 보일러의 온수 공급 장치{Hot water supplying system of boiler equipped with dual pipe heat exchanger}Hot water supplying system of boiler equipped with dual pipe heat exchanger}

도 1은 종래의 온수 유로가 외부에 설치된 이중관 열교환기가 구비된 보일러의 온수 공급 장치의 구성을 보여주는 구성도,1 is a configuration diagram showing a configuration of a hot water supply device of a boiler having a double tube heat exchanger installed in a conventional hot water flow path outside;

도 2는 본 고안의 일실시예에 따른 이중관 열교환기가 구비된 보일러의 온수 공급 장치의 구성을 보여주는 구성도,Figure 2 is a block diagram showing the configuration of a hot water supply device of the boiler provided with a double tube heat exchanger according to an embodiment of the present invention,

도 3은 본 고안의 일실시예에 따른 정상 사용시와 단수시 역류 방지변 및 압력 흡수장치의 작용을 보여주는 단면도.Figure 3 is a cross-sectional view showing the action of the non-return valve and the pressure absorbing device in normal use and water shortage in accordance with an embodiment of the present invention.

*도면의 주요 부분에 관한 부호의 설명** Explanation of symbols on main parts of the drawings *

10 : 연소실 20 : 버너10: combustion chamber 20: burner

30 : 열교환기 31 : 외관30: heat exchanger 31: appearance

32 : 내관 40 : 순환 펌프32: inner tube 40: circulation pump

50 : 난방 라인 51 : 난방수 공급관50: heating line 51: heating water supply pipe

52 : 제1환수관 53 : 팽창 탱크52: first return pipe 53: expansion tank

54 : 제2환수관 55 : 제3환수관54: second return pipe 55: third return pipe

61 : 직수관 62 : 온수관61: water pipe 62: hot water pipe

70 : 역류 방지변 80 : 압력 흡수장치70: countercurrent prevention valve 80: pressure absorber

본 고안은 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 관한 것으로, 더욱 상세하게는 난방 및 온수겸용 보일러에서 온수 유로가 외관으로, 난방 유로가 내관으로 설치된 이중관 열교환기를 사용한 보일러에 있어서 상수도가 단수된 상황에서도 난방 가동을 정상적으로 수행할 수 있는 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 관한 것이다.The present invention relates to a hot water supply device for a boiler equipped with a double tube heat exchanger, and more particularly, in the boiler using a double tube heat exchanger having a heating channel as an inner tube and a heating channel as an inner tube, The present invention relates to a hot water supply device of a boiler having a double tube heat exchanger capable of performing a heating operation normally.

주지하는 바와 같이 보일러(boiler)는 일반 가정이나 공공 건물 등에서 난방용이나 온수용으로 사용되고 있다. 일반적으로 보일러는 이중관 열교환기(dual pipe heat exchanger) 방식 또는 단일관 열교환기(single pipe heat exchanger) 방식을 사용하고 있다. As is well known, a boiler is used for heating or hot water in a general home or a public building. In general, a boiler uses a dual pipe heat exchanger method or a single pipe heat exchanger method.

통상적으로 이중관 열교환기 방식이란 온수 유로와 난방 유로가 연소실 내에서 이중관을 형성하여 연소열을 직접적으로 교환하는 방식이며, 단일관 열교환기 방식이란 온수 열교환관이 연소실로부터 분리 설치되어 연소열을 간접적으로 교환하는 방식을 말한다.In general, the double tube heat exchanger method is a method in which a hot water flow path and a heating channel form a double pipe in a combustion chamber to directly exchange combustion heat, and the single tube heat exchanger method is a hot water heat exchanger tube installed separately from the combustion chamber to indirectly exchange combustion heat. Say the way.

도 1은 종래의 온수 유로가 외부에 설치된 이중관 열교환기가 구비된 보일러의 온수 공급 장치의 구성을 보여주는 구성도이다.1 is a block diagram showing a configuration of a hot water supply apparatus of a boiler having a double tube heat exchanger installed in a conventional hot water flow path.

종래의 보일러는 연소실(10)의 하부에 버너(burner, 20)가 설치되어 있고, 상기 버너(20)의 상부에 열교환기(30)가 설치되어 있다. 따라서 버너(20)에서 발생 한 열에너지는 열교환기(30)에 전달되고, 상기 열교환기(30)는 통상 물이 흐르는 관들로 구성된다.In the conventional boiler, a burner 20 is installed at a lower portion of the combustion chamber 10, and a heat exchanger 30 is provided at an upper portion of the burner 20. Therefore, the heat energy generated by the burner 20 is transferred to the heat exchanger 30, the heat exchanger 30 is composed of tubes through which water flows.

이중관 열교환기 방식 중의 하나는 첨부된 도 1에 도시한 바와 같이 온수 유로가 외관(outer pipe, 31)에 형성되고, 난방 유로는 내관(inner pipe, 32)에 형성되어 버너(20)로부터의 연소열이 일차적으로 외관(31)에 먼저 전달된 후 2차적으로 내관(32)에 전달되는 구조를 취한다. One of the double tube heat exchanger method is that the hot water flow path is formed in the outer pipe (31), the heating flow path is formed in the inner pipe (32) as shown in Figure 1 attached to the heat of combustion from the burner 20 This first takes a structure that is first delivered to the exterior 31 and then secondly to the inner tube 32.

이러한 이중관 열교환기 방식의 보일러에서 난방수 순환장치는 열교환기(30)의 내관(32), 난방수 공급관(51), 난방 라인(50), 제1환수관(52), 팽창 탱크(53), 제2환수관(54), 순환 펌프(40), 제3환수관(55)이 순차로 연결되어 구성된다.In the boiler of the double tube heat exchanger type, the heating water circulation system includes an inner tube 32, a heating water supply pipe 51, a heating line 50, a first return pipe 52, and an expansion tank 53 of the heat exchanger 30. The second return pipe 54, the circulation pump 40, and the third return pipe 55 are sequentially connected.

따라서 난방 가동 중에는 순환 펌프(40)에 의하여 열교환기(30)의 내관(32)에 난방 유로의 흐름이 생기고 이러한 난방 유로의 흐름에 의하여 연소실(20)에서 발생한 열에너지가 난방 라인(50)으로 전달된다.Therefore, during the heating operation, the flow path of the heating path is generated in the inner tube 32 of the heat exchanger 30 by the circulation pump 40, and the heat energy generated in the combustion chamber 20 is transferred to the heating line 50 by the flow of the heating path. do.

한편 온수 공급 장치는 열교환기의 외관(31)으로 물을 공급하는 직수관(61), 열교환기(30)의 외관(31), 상기 외관(31)으로부터 가열된 물이 빠져나가는 온수관(62)이 순차적으로 연결되어 구성된다.Meanwhile, the hot water supply device includes a direct water pipe 61 for supplying water to the exterior 31 of the heat exchanger, the exterior 31 of the heat exchanger 30, and a hot water tube 62 through which the water heated from the exterior 31 escapes. ) Are sequentially connected.

따라서 상수도(도시하지 않음)로부터 들어온 물은 직수관(61)을 경유하여 열교환기(30)의 외관(31)으로 보내지며, 열교환기(30)에서 연소열에 의하여 가열된 외관(31)의 온수는 온수관(62)을 통하여 외부로 배출된다.Therefore, the water coming from the tap water (not shown) is sent to the exterior 31 of the heat exchanger 30 via the direct water pipe 61, and the hot water of the exterior 31 heated by combustion heat in the heat exchanger 30. Is discharged to the outside through the hot water pipe (62).

그러나 상수도의 공급이 일시적으로 중단되는 상황이 발생하면, 열교환기(30)의 외관(31)에 존재하는 물이 직수관(61)을 통하여 빠져나가게 되어 외관(31) 과 내관(32) 사이의 열교환 매체인 물이 부족하게 되어 정상적인 난방이 이루어 지지 않는 문제점이 있다. 또한, 열교환기(30)가 과열되어 손상되는 문제점도 발생할 가능성도 있다.However, when a situation in which the supply of water supply is temporarily stopped, the water present in the exterior 31 of the heat exchanger 30 is drawn out through the straight pipe 61 and the space between the exterior 31 and the inner tube 32. There is a problem that the normal heat is not made due to the lack of water that is a heat exchange medium. In addition, the heat exchanger 30 may be overheated and damaged.

따라서 본 고안은 상술한 제반 문제점을 해결하고자 안출된 것으로, 난방 유로가 내관으로 형성된 이중관 열교환기를 구비한 보일러에 있어서 상수도가 단수된 상황에서도 난방 가동을 정상적으로 수행할 수 있는 이중관 열교환기가 구비된 보일러의 온수 공급 장치를 제공함에 그 목적이 있다.Therefore, the present invention has been made to solve the above-mentioned problems, the boiler with a double tube heat exchanger with a heating flow path is formed in the inner tube of the boiler with a double tube heat exchanger capable of performing the heating operation normally even in the situation where the water supply is singular. The purpose is to provide a hot water supply device.

상술한 바와 같은 목적을 구현하기 위한 본 고안의 이중관 열교환기가 구비된 보일러의 온수 공급 장치는 연소실의 버너에 의한 연소열이 직접 가해지는 외관과 상기 외관의 내부에 설치되는 내관으로 구성된 이중관 열교환기; 상기 열교환기의 상기 외관으로 물을 공급하는 직수관; 상기 열교환기의 상기 외관으로부터 물이 빠져나가는 온수관;을 포함하여 이루어진 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 있어서, 상기 직수관은 역류 방지변 및 압력 흡수장치를 설치한 것을 특징으로 한다.Hot water supply apparatus of the boiler provided with a double-tube heat exchanger of the present invention for realizing the object as described above is a double-tube heat exchanger consisting of an outer tube directly applied to the heat of combustion by the burner of the combustion chamber and an inner tube installed inside the exterior; A direct pipe for supplying water to the external appearance of the heat exchanger; The hot water supply device of the boiler provided with a double-tube heat exchanger comprising a; the hot water pipe is characterized in that the reverse flow prevention valve and the pressure absorbing device is installed.

이하 첨부한 도면을 참조하여 본 고안의 바람직한 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention with reference to the accompanying drawings in detail as follows.

도 2는 본 고안의 일실시예에 따른 이중관 열교환기가 구비된 보일러의 온수 공급 장치의 구성을 보여주는 구성도이다.Figure 2 is a block diagram showing the configuration of a hot water supply apparatus of a boiler provided with a double tube heat exchanger according to an embodiment of the present invention.

본 고안에 의한 직수관(61), 열교환기의 외관(31), 온수관(62)의 구성은 종래의 기술과 동일하므로 설명의 중복을 피하기 위하여 상세한 설명은 생략하고, 새로이 부가되는 구성부재들의 동작을 중심으로 하여 상세히 설명한다.Since the configuration of the water pipe 61, the appearance 31 of the heat exchanger, and the hot water pipe 62 according to the present invention is the same as in the prior art, the detailed description is omitted in order to avoid duplication of description, and the newly added components The operation will be described in detail.

첨부된 도 2에 도시한 바와 같이 본 고안에 의한 이중관 열교환기가 구비된 보일러의 온수 공급 장치는 상기 직수관(61)에 역류 방지변(check valve, 70)을 설치하고 상기 역류 방지변(70)과 열교환기(30) 사이의 직수관(61)에 압력 흡수장치(80)를 설치하는 것으로 이루어진다.As shown in FIG. 2, the hot water supply device of the boiler equipped with the double pipe heat exchanger according to the present invention includes a check valve 70 installed in the water pipe 61 and the reverse flow prevention valve 70. And a pressure absorbing device 80 in the straight pipe 61 between the heat exchanger 30 and the heat exchanger 30.

상기 역류 방지변(70)은 도 3에 도시한 바와 같이 단수상태가 아닌 정상적으로 사용시에는 상수도로부터 직수가 열교환기(30) 방향으로 흐를 수 있도록 구성되어 있다. 또한 단수시에는 도 3에 도시한 바와 같이 열교환기(30)의 외관(31)에 존재하는 물이 상수도로 빠져나가는 것을 방지하는 역할을 한다.As shown in FIG. 3, the non-return valve 70 is configured such that direct water flows from the water supply in the direction of the heat exchanger 30 when it is not normally used in the singular state. In addition, as shown in Figure 3 serves to prevent the water present in the outer appearance 31 of the heat exchanger 30 to escape to the tap water as shown in FIG.

상기 압력 흡수장치(80)는 도 3에 도시한 바와 같이 단수상태가 아닌 정상적으로 사용시에는 작용을 하지 않다가, 단수시 역류 방지변(70)에 의하여 물의 흐름이 차단된 상태에서 열교환기의 외관에 차있는 물이 가열되어 부피팽창을 함으로써 발생하는 압력 상승을 완충하는 역할을 한다.The pressure absorbing device 80 does not function during normal use but is not in the singular state as shown in FIG. The filled water is buffered to increase the pressure caused by the volume expansion.

즉 도 3에 도시한 바와 같이 단수시도 역류 방지변(70)에 의한 열교환기의 압력이 지나치게 상승하지 않도록 가열된 온수가 팽창한 부피만큼의 공간을 제공함으로써 열교환기 내부의 압력 상승에 의한 파손을 방지하는 것이다. That is, as shown in FIG. 3, the hot water heated to provide a space equal to the volume of the expanded hot water to prevent the pressure of the heat exchanger caused by the non-return valve 70 from being shortly raised so as to prevent damage due to the pressure increase inside the heat exchanger. To prevent.

본 고안은 상기 실시 예에 한정되지 안고 본 고안의 기술적 요지를 벗어나지 않는 범위 내에서 다양하게 수정/변형되어 실시될 수 있음은 당해 기술분야의 통상 의 지식을 가진 자에 있어서 자명하다.It is apparent to those skilled in the art that the present invention is not limited to the above embodiments and can be carried out in various modifications / modifications without departing from the technical gist of the present invention.

이상에서 상세히 설명한 바와 같이, 본 고안에 따른 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 의하면, 역류 방지변 및 압력 흡수장치를 구비함으로써 상수도가 단수된 상황에서도 난방 가동을 정상적으로 수행할 수 있고 보일러의 과열에 의한 손상을 방지하여 보일러의 수명을 향상시키는 효과가 있다.As described in detail above, according to the hot water supply device of the boiler equipped with a double-tube heat exchanger according to the present invention, by providing a non-return valve and a pressure absorbing device, the heating operation can be normally performed even in the situation where the water supply is singular. It is effective in preventing the damage caused by overheating and improving the life of the boiler.

Claims (1)

연소실의 버너에 의한 연소열이 직접 가해지는 외관과 상기 외관의 내부에 설치되는 내관으로 구성된 이중관 열교환기; 상기 열교환기의 상기 외관으로 물을 공급하는 직수관; 상기 열교환기의 상기 외관으로부터 물이 빠져나가는 온수관;을 포함하여 이루어진 이중관 열교환기가 구비된 보일러의 온수 공급 장치에 있어서, 상기 직수관은 역류 방지변 및 압력 흡수장치를 설치한 것을 특징으로 하는 이중관 열교환기가 구비된 보일러의 온수 공급 장치.A double tube heat exchanger composed of an outer tube to which combustion heat is directly applied by a burner of the combustion chamber and an inner tube installed inside the outer tube; A direct pipe for supplying water to the external appearance of the heat exchanger; In the hot water supply device of the boiler with a double-pipe heat exchanger comprising a; hot water pipe from which the water escapes from the appearance of the heat exchanger, the direct pipe is a double pipe characterized in that the backflow preventing valve and the pressure absorbing device is installed Hot water supply device for a boiler equipped with a heat exchanger.
KR2020050032929U 2005-11-22 2005-11-22 Hot water supply unit of boiler with double tube heat exchanger KR200407573Y1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR2020050032929U KR200407573Y1 (en) 2005-11-22 2005-11-22 Hot water supply unit of boiler with double tube heat exchanger
CNA2006800436298A CN101313182A (en) 2005-11-22 2006-03-14 Hot water supplying system of boiler equipped with dual pipe heat exchanger
PCT/KR2006/000899 WO2007061159A1 (en) 2005-11-22 2006-03-14 Hot water supplying system of boiler equipped with dual pipe heat exchanger
EP06716349A EP1957886A1 (en) 2005-11-22 2006-03-14 Hot water supplying system of boiler equipped with dual pipe heat exchanger
US12/085,267 US20090283057A1 (en) 2005-11-22 2006-03-14 Hot-Water Supplying System of Boiler Equipped With Dual Pipe Heat Exchanger
JP2008542220A JP2009516819A (en) 2005-11-22 2006-03-14 Boiler hot water supply system with double pipe heat exchanger

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KR2020050032929U KR200407573Y1 (en) 2005-11-22 2005-11-22 Hot water supply unit of boiler with double tube heat exchanger

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US (1) US20090283057A1 (en)
EP (1) EP1957886A1 (en)
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KR (1) KR200407573Y1 (en)
CN (1) CN101313182A (en)
WO (1) WO2007061159A1 (en)

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US20090283057A1 (en) 2009-11-19
WO2007061159A1 (en) 2007-05-31
EP1957886A1 (en) 2008-08-20
CN101313182A (en) 2008-11-26
JP2009516819A (en) 2009-04-23

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