KR940005040Y1 - Heat-exchanger - Google Patents

Heat-exchanger Download PDF

Info

Publication number
KR940005040Y1
KR940005040Y1 KR2019910022971U KR910022971U KR940005040Y1 KR 940005040 Y1 KR940005040 Y1 KR 940005040Y1 KR 2019910022971 U KR2019910022971 U KR 2019910022971U KR 910022971 U KR910022971 U KR 910022971U KR 940005040 Y1 KR940005040 Y1 KR 940005040Y1
Authority
KR
South Korea
Prior art keywords
heat
heat exchange
chamber
air supply
pipe
Prior art date
Application number
KR2019910022971U
Other languages
Korean (ko)
Other versions
KR930015255U (en
Inventor
노종호
Original Assignee
주식회사 한국금속
노상훈
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 한국금속, 노상훈 filed Critical 주식회사 한국금속
Priority to KR2019910022971U priority Critical patent/KR940005040Y1/en
Publication of KR930015255U publication Critical patent/KR930015255U/en
Application granted granted Critical
Publication of KR940005040Y1 publication Critical patent/KR940005040Y1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05391Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/0052Details for air heaters
    • F24H9/0057Guiding means
    • F24H9/0068Guiding means in combustion gas channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/02Casings; Cover lids; Ornamental panels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/18Arrangement or mounting of grates or heating means
    • F24H9/1854Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1877Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1881Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0024Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers

Landscapes

  • 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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

내용 없음.No content.

Description

열교환기heat transmitter

제1도는 종래 열교환기의 단면도.1 is a cross-sectional view of a conventional heat exchanger.

제2도는 본 고안에 따른 열교환기의 단면도.2 is a cross-sectional view of a heat exchanger according to the present invention.

제3도는 본 고안에 따른 열교환기의 보온재의 분리 사시도.Figure 3 is an exploded perspective view of the heat insulating material of the heat exchanger according to the present invention.

제4도는 본 고안에 따른 열교환기의 타실시예를 나타낸 단면도.Figure 4 is a cross-sectional view showing another embodiment of a heat exchanger according to the present invention.

제5도는 제4도의 A-A선 단면도.5 is a cross-sectional view taken along the line A-A of FIG.

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

1 : 연소실 2 : 급기실1: combustion chamber 2: air supply chamber

3 : 배기실 11 : 보온재3: exhaust chamber 11: heat insulating material

12 : 상부보온재 12a,12b : 구멍12: upper insulation 12a, 12b: hole

13 : 하부보온재 14 : 철망13: lower insulation 14: wire mesh

15 : 열교환 파이프 15a : 요홈15: heat exchange pipe 15a: groove

16,17 : 연결관 18 : 통제16,17 connector 18: control

19,20 : 접속관 36,37 : 급기관19,20: connecting pipe 36,37: air supply pipe

39 : 열교환 파이프39: heat exchange pipe

본 고안은 열교환기에 관한 것으로 특히, 급기실과 배기실 및 이들 사이에 연결된 열교환 파이프의 구조를 개선하여 열교환 효과를 높혀주고, 연료 절감에 기여하도록 한 열교환기에 관한 것이다.The present invention relates to a heat exchanger, and more particularly, to a heat exchanger that improves the heat exchange effect by contributing to the structure of a heat exchange pipe connected between the air supply chamber and the exhaust chamber, and contributes to fuel savings.

종래의 열교환기는 제1도에서 보는 바와 같이 버너와 팬이 내장된 연소실(31)의 일측 상단에 급기관(36)을 연결하고, 그 상측의 급기실(32) 하단에도 급기관(37)을 연결하여 이들 급기관(36),(37)을 상호 연결접속시킨 다음, 상기 급기실(32)의 프레임(34)과 배기실(33)의 프레임(35)사이에 직선관으로 된 수개의 열교환 파이프(39)를 연결하고, 배기실(33) 상단에 배기관(38)을 연결하므로서, 버너에 의해 가열된 연소실(31)내의 공기가 급기관(36),(37)을 통해 급기실(32)로 유입된 다음 각각의 열교환 파이프(39)를 지나면서 외부의 찬공기와 열교환을 이루고, 이어서 배기실(33)로 다시 모아진 다음, 배기관(38)을 통하여 외부로 배출되었던 것이다.The conventional heat exchanger connects the air supply pipe 36 to the upper end of one side of the combustion chamber 31 in which the burner and the fan are built, as shown in FIG. 1, and supplies the air supply pipe 37 to the lower end of the air supply chamber 32 above. Several interconnections between the air supply pipes 36 and 37, and then connect the frame 34 of the air supply chamber 32 with the frame 35 of the exhaust chamber 33. By connecting the pipe 39 and the exhaust pipe 38 to the upper end of the exhaust chamber 33, the air in the combustion chamber 31 heated by the burner is supplied to the air supply chamber 32 through the air supply pipes 36 and 37. ) And then heat exchange with the external cold air passing through each heat exchange pipe (39), and then collected again to the exhaust chamber 33, and then discharged to the outside through the exhaust pipe (38).

따라서, 상기와 같은 열교환기는 열교환 파이프(39)가 모두 직선관으로 되어 있어, 외부의 찬공기와의 접촉면적이 작기 때문에 그만큼 열교환 효과가 떨어지고, 또한 열교환 파이프(39)를 통과하면서 미처 열교환을 이루지 못한 고열의 폐가스가 배기실(33)과 배기관(38)을 거쳐 그대로 외부로 배출되므로서, 열손실이 많았던 것이다.Therefore, in the heat exchanger as described above, since all of the heat exchange pipes 39 are straight pipes, the contact area with the external cold air is small, so that the heat exchange effect is inferior, and the heat exchange pipe 39 does not realize heat exchange. The waste gas of unheated high heat is discharged to the outside through the exhaust chamber 33 and the exhaust pipe 38 as it is, and there was much heat loss.

아울러, 연소실(31)과 급기실(32)사이가 두개의 급기관(36)(37)으로 연결되어 있고, 이들 급기관(36)(37)을 통해서도 쓸데없는 열교환이 이루어지므로서, 이 또한 열손실을 초래하는 요인이 되었던 것이다.In addition, since the combustion chamber 31 and the air supply chamber 32 are connected to the two air supply pipes 36 and 37, useless heat exchange is also performed through these air supply pipes 36 and 37, It was a factor that causes heat loss.

본 고안은 이러한 문제점을 해결하기 위하여 열교환 파이프와 찬공기와의 접촉면적을 넓혀주고, 폐가스의 잠열을 배기실내에서 어느 정도 흡수하며, 열교환이 방지되도록 한 것이다.In order to solve this problem, the present invention broadens the contact area between the heat exchange pipe and cold air, absorbs latent heat of waste gas in the exhaust chamber, and prevents heat exchange.

이와 같은 목적을 달성하기 위해 본 고안은 열교환 파이프를 요철형태나 가지관 형태로 형성하여, 찬공기와의 접열면적을 최대한 넓혀주고, 배기실내에는 보온재를 내설하여 폐가스의 잠열을 흡수하며, 또한 연소실과 급기실을 직결시켜 불필요한 열교환이 방지되도록 안출한 것이다.In order to achieve the above object, the present invention forms a heat exchange pipe in the form of unevenness or branch pipe to maximize the area of fusion with cold air, and insulates heat in the exhaust chamber to absorb latent heat of waste gas. The supercharger is directly connected to prevent unnecessary heat exchange.

이하에서 본 고안을 첨부된 도면에 의거 보다 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제2도에서 보는 바와 같이 본 고안은 버너와 팬이 내장된 연소실(1)의 일측 주연에 브라켓트(8)를 부착하고, 급기실(2)을 구성하는 카바(4)와 프레임(5)을 상, 하 길게 형성하여, 프레임(5)하단을 상기 연소실(1) 주연의 브라켓트(8)에 부착하며, 그 전면부 외측에 열차단판(9)을 설치한다.As shown in FIG. 2, the present invention attaches the bracket 8 to one side of the combustion chamber 1 in which the burner and the fan are built, and attaches the cover 4 and the frame 5 constituting the air supply chamber 2. The upper and lower sides are formed long, and the lower end of the frame 5 is attached to the bracket 8 at the periphery of the combustion chamber 1, and a heat shield plate 9 is provided outside the front part.

그리고, 상기 연소실(1)의 프레임(5) 상측에 다수의 요홈(15a)이 형성된 열교환 파이프(15)의 일단을 연결하고, 타단을 이후에 설명하는 배기실(3)의 보온재(11)에 연결한다.Then, one end of the heat exchange pipe 15 having the plurality of grooves 15a formed on the frame 5 of the combustion chamber 1 is connected, and the other end is connected to the heat insulating material 11 of the exhaust chamber 3 described later. Connect.

또한, 카바(6)와 프레임(7)으로 구성된 배기실(3)내에 상,하부로 분리형성된 보온재(11)를 삽입하여, 이 보온재(11)의 일측에 상기한 열교환 파이프(15)의 일단을 삽입하여 연결하고, 상단에는 배기관(10)을 연결하여 카바(6) 외부로 돌출시킨다. 이때, 상기 열교환 파이프(15)는 직선관의 상,하부 주연에 프레스가공등을 통하여 수개의 요홈(15a)을 교대로 형성하므로서, 같은 길이의 직선관에 비해 외부의 표면적을 넓게 형성한다.In addition, the heat insulating material 11 is formed into the exhaust chamber 3 composed of the cover 6 and the frame 7, and is separated into upper and lower portions, and one end of the heat exchange pipe 15 described above is provided on one side of the heat insulating material 11. Insert it and connect it, and connect the exhaust pipe 10 to the top to protrude out of the cover (6). At this time, the heat exchange pipe 15 alternately forms a plurality of grooves 15a on the upper and lower circumferences of the straight pipe through press working or the like, thereby forming a wider external surface area than the straight pipe of the same length.

그리고, 상기 보온재(11)를 제3도와 같이 내부가 빈 상,하부 보온재(12),(13)로 구성하여 이들 상, 하부 보온재(12),(13) 일측면에 상기 열교환 파이프(15)의 일단이 끼워지게 구멍(12a),(13a)을 형성하고, 내면에는 그물형상으로 된 철망(14)을 내설하며, 이중 상부보온재(12)의 상단에는 배기관(10)이 끼워질 수 있게 구멍(12b)을 형성한다.In addition, the heat insulating material 11 is composed of upper and lower heat insulating materials 12 and 13 having empty interiors as shown in FIG. 3, and the heat exchange pipe 15 is disposed on one side of the upper and lower heat insulating materials 12 and 13. One end of the hole 12a, 13a is formed to be fitted, the inner surface of the mesh-shaped wire mesh 14, the inner surface of the double upper heat insulating material 12, the hole for the exhaust pipe 10 can be fitted (12b) is formed.

상기와 같이 구성된 본 고안의 동작과 작용효과를 설명하면 다음과 같다.Referring to the operation and effect of the present invention configured as described above are as follows.

먼저 연소실(1)내의 공기가 버너에 의해 가열되면, 이 가열된 공기는 팬에 의해 곧바로 연소실(1)과 연통된 급기실(2)로 보내지고, 급기실(2)로 유입된 공기는 각각의 열교환 파이프(15)를 통과하면서 찬공기와 열교환을 이룬 다음 배기실(3)의 보온재(11) 외부로 유입되며, 이후에는 배기관(10)을 통하여 외부로 배출된다.First, when the air in the combustion chamber 1 is heated by the burner, the heated air is sent directly to the air supply chamber 2 in communication with the combustion chamber 1 by a fan, and the air introduced into the air supply chamber 2 is respectively. After passing through the heat exchange pipe 15 of the heat exchange with the cold air is introduced into the heat insulating material 11 of the exhaust chamber 3, and then discharged to the outside through the exhaust pipe (10).

상기 동작중 버너에 의해 가열된 연소실(1)내의 공기가 급기실(2)로 유입될때는 별도의 통로를 거치지 않고 곧바로 유입되므로, 쓸데없는 열손실이 없게 되고, 또한 이 공기가 열교환 파이프(15)를 통과할 때는 열교환 파이프(15) 자체가 굴곡지게 형성되어 있어, 외부와의 접촉면적이 크기 때문에 그만큼 열교환 효과가 크게된다.When the air in the combustion chamber (1) heated by the burner during the operation is introduced into the air supply chamber (2) immediately flows without passing through a separate passage, there is no useless heat loss, and this air is also used as a heat exchange pipe (15). When passing through), the heat exchange pipe 15 itself is formed to be bent, and since the contact area with the outside is large, the heat exchange effect is increased by that much.

또한, 보온재(11)에서는 열교환 파이프(15)를 통과한 공기가 외부로 배출되기 직전 이 공기가 갖고 있는 잠열을 흡수하게 실내로 방출하므로서, 결국 폐열까지도 회수하게 되는 것이다.In addition, the heat insulating material 11 is discharged to the room to absorb the latent heat of the air immediately before the air passing through the heat exchange pipe 15 is discharged to the outside, and eventually to recover the waste heat.

한편, 본 고안을 실시함에 있어서는 열교환 파이프(15)의 구성을 제4도 및 제5도와 같이 형성해도 무방하며, 본 고안과 동일한 효과를 얻을 수 있다.In addition, in implementing this invention, the structure of the heat exchange pipe 15 may be formed like FIG. 4 and FIG. 5, and the same effect as this invention can be acquired.

즉, 급기실(2)의 프레임(5)과 배기실(3)의 카바(6) 사이에 연결관(16),(17)으로 연결되는 수개의 통체(18)를 설치하여 이들 통체(18)를 각각 두개씩의 접속관(19),(20)으로 연결하므로서, 급기실(2)내의 가열된 공기가 상기 연결관(16)과 통체(18) 및 접속관(19),(20) 연결관(17)을 차례로 순환하면서, 외부의 찬 공기와 열교환을 이루도록 하는 것이다.That is, several cylinders 18 connected to the connecting pipes 16 and 17 are provided between the frame 5 of the air supply chamber 2 and the cover 6 of the exhaust chamber 3 to form these cylinders 18. ) Is connected to each of the two connecting pipes 19 and 20, so that the heated air in the air supply chamber 2 connects the connecting pipe 16 to the cylinder 18 and the connecting pipes 19 and 20. By circulating the pipe 17 one after another, the heat exchange with the cold air outside.

이렇게 하면 통제(18)와 접속관(19),(20)이 수개의 열교환 파이프(15) 역할을 대신하게 되고, 외부와의 접촉면적도 커지게 되므로 열교환 효과가 우수하게 되며, 이때 통체(18)를 연결하는 통체(18) 양측의 접속관(19),(20)의 위치를 90 정도 서로 어긋난 위치에 연결하는 것이 좋다.In this case, the control 18 and the connection pipes 19 and 20 take the place of several heat exchange pipes 15, and the contact area with the outside becomes large, so that the heat exchange effect is excellent, and the cylinder 18 It is good to connect the position of the connection pipe | tube 19, 20 of both sides of the cylinder 18 which connects) to the position which shifted | deviated about 90 degree | times.

이상에서 설명한 바와 같이 본 고안은 열교환기의 급기실(2)하단을 길게 연장하여 연소실(1)과 직접 연결하므로서, 불필요한 열손실을 방지하고, 열교환 파이프(15) 자체를 요철형태나 가지관형태로 형성하여 외부와의 접촉면적을 넓혀주므로서 열교환 효과가 뛰어나게 되며, 배기실(3)내에 보온재(11)를 내장하여 외부로 배출되는 공기의 폐열까지도 흡수할 수 있는 효과가 있는 것이다.As described above, the present invention extends the lower end of the air supply chamber 2 of the heat exchanger to be directly connected to the combustion chamber 1, thereby preventing unnecessary heat loss, and the heat exchange pipe 15 itself is uneven or branched. It is formed to increase the contact area with the outside is excellent heat exchange effect, there is an effect that can absorb even the waste heat of the air discharged to the outside by embedding the heat insulating material 11 in the exhaust chamber (3).

Claims (5)

버너와 팬이 내장된 연소실(1)과, 급기실(2), 배기실(3)을 갖는 열교환기에 있어서, 상기 급기실(2)을 하향 연장하여 연소실(1)과 직접 연결하고, 급기실 상측과 배기실(3) 사이에 열교환 파이프(15)를 연결하며, 배기실(3)내에는 상기 열교환 파이프(15)가 끼워지게 보온재(11)를 내장하여서 구성한 것을 특징으로 하는 열교환기.In a heat exchanger having a combustion chamber (1) having a burner and a fan, an air supply chamber (2), and an exhaust chamber (3), the air supply chamber (2) extends downward and is directly connected to the combustion chamber (1). A heat exchanger (15) is connected between the upper side and the exhaust chamber (3), and a heat insulating material (11) is built in the exhaust chamber (3) so that the heat exchange pipe (15) is fitted therein. 제1항에 있어서, 열교환 파이프(15)는 직선관의 상,하부에 수개의 요홈(15a)을 교대로 형성한 것을 특징으로 하는 열교환기.The heat exchanger according to claim 1, wherein the heat exchange pipe (15) is formed by alternately forming several grooves (15a) in the upper and lower portions of the straight pipe. 제1항에 있어서, 열교환 파이프(15)는 급기실(2) 및 배기실(3)의 연결관(16),(17)사이에 수개의 통체(18)를 접속관(19),(20)으로 연결하여서 구성한 것을 특징으로 하는 열교환기.The heat exchange pipe (15) according to claim 1, wherein the heat exchange pipe (15) connects several cylinders (18) between the connection pipes (16) and (17) of the air supply chamber (2) and the exhaust chamber (3). Heat exchanger characterized in that configured by connecting). 제3항에 있어서, 통체(8) 양측의 접속관(19),(20)은 서로 90 어긋난 위치에 연결한 것을 특징으로 하는 열교환기.4. The heat exchanger according to claim 3, wherein the connecting pipes (19) (20) on both sides of the cylinder (8) are connected at positions 90 shifted from each other. 제1항에 있어서, 배기실(3)내의 보온재(11)는 상,하부 보온재(12),(13)로 분리 형성하여, 그 내면에 철망(14)를 내설한 것을 특징으로 하는 열교환기.The heat exchanger according to claim 1, wherein the heat insulating material (11) in the exhaust chamber (3) is separated into upper and lower heat insulating materials (12) and (13), and a wire mesh (14) is installed on the inner surface thereof.
KR2019910022971U 1991-12-20 1991-12-20 Heat-exchanger KR940005040Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019910022971U KR940005040Y1 (en) 1991-12-20 1991-12-20 Heat-exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019910022971U KR940005040Y1 (en) 1991-12-20 1991-12-20 Heat-exchanger

Publications (2)

Publication Number Publication Date
KR930015255U KR930015255U (en) 1993-07-27
KR940005040Y1 true KR940005040Y1 (en) 1994-07-27

Family

ID=19324796

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019910022971U KR940005040Y1 (en) 1991-12-20 1991-12-20 Heat-exchanger

Country Status (1)

Country Link
KR (1) KR940005040Y1 (en)

Also Published As

Publication number Publication date
KR930015255U (en) 1993-07-27

Similar Documents

Publication Publication Date Title
KR100390521B1 (en) Heat Exchanger of Condensing Boiler
KR940005040Y1 (en) Heat-exchanger
KR100447443B1 (en) Boiler with dual water chamber
JP3286904B2 (en) Outdoor combustion equipment
GB2144204A (en) Heating boilers
KR840001028Y1 (en) Hot water boiler for coal briquette
KR100433472B1 (en) Main Casing Sturcture of Oil Cornbined Gao Boiker
KR100915194B1 (en) Heating System
KR200195776Y1 (en) A heating system by using the thermal of exhaust gas
JPS642121Y2 (en)
KR960003470B1 (en) Heat-exchanger of gas boiler
JPH0136015Y2 (en)
KR900009732Y1 (en) Electric hot water heater
KR800000530Y1 (en) Hot water circulating door for cleaning boiler
KR200173949Y1 (en) Steam generating boiler
KR200193759Y1 (en) Boiler
KR200165354Y1 (en) 3 way type flue boiler without wing room
KR20050088616A (en) Rapid hot water and heating water boiler
KR200212142Y1 (en) Instant water heater using heater pipe
KR960000128Y1 (en) Reheating boiler
KR820001711Y1 (en) Boiler having crooked water jacket
KR950002267Y1 (en) Heat blower for greenhouse
KR830000903Y1 (en) Anchovy ripening machine
KR790001613Y1 (en) Air heating stove
KR800000949Y1 (en) Aseembled electronic heater for ondol

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20020726

Year of fee payment: 9

LAPS Lapse due to unpaid annual fee