KR20020031825A - Boiler - Google Patents

Boiler Download PDF

Info

Publication number
KR20020031825A
KR20020031825A KR1020000062566A KR20000062566A KR20020031825A KR 20020031825 A KR20020031825 A KR 20020031825A KR 1020000062566 A KR1020000062566 A KR 1020000062566A KR 20000062566 A KR20000062566 A KR 20000062566A KR 20020031825 A KR20020031825 A KR 20020031825A
Authority
KR
South Korea
Prior art keywords
hot water
pipe
housing
water
boiler
Prior art date
Application number
KR1020000062566A
Other languages
Korean (ko)
Inventor
최병규
Original Assignee
최병규
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 최병규 filed Critical 최병규
Priority to KR1020000062566A priority Critical patent/KR20020031825A/en
Publication of KR20020031825A publication Critical patent/KR20020031825A/en

Links

Classifications

    • 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
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18Water-storage heaters
    • F24H1/20Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
    • F24H1/202Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply with resistances
    • 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
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18Water-storage heaters
    • F24H1/181Construction of the tank
    • F24H1/182Insulation
    • 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
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/43Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes helically or spirally coiled
    • 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
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • 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
    • F24H2250/00Electrical heat generating means
    • F24H2250/02Resistances
    • 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
    • F24H9/06Arrangement of mountings or supports for heaters, e.g. boilers, other than space heating radiators

Abstract

PURPOSE: An electric boiler is provided to save the maintenance fee by using power at midnight and to improve the convenience of use and sanitary condition by using hot water as potable water. CONSTITUTION: A plurality of heater rods(3) are installed at a bottom of a housing(1) so as to generate the high temperature. An inlet pipe(2) is provided at a lower portion of the housing(1) and an outlet pipe(2') is provided at an upper portion of the housing(1). Coil type hot water pipes(4,4') are connected to the upper portion of the heater rod(3) in series by using a connection pipe(5). A lead end of the coil type hot water pipe(4) acts as a cool water inlet pipe(4a), and a rear end of a coil type hot water pipe(4') acts as a hot water discharging pipe(4a'). An insulation material(6) is provided at an outer portion of the housing(1).

Description

전기 보일러{Boiler}Electric Boiler {Boiler}

본 발명은 전기 보일러에 관한 것으로, 좀 더 구체적으로는 가정용은 물론 기숙사나 여관, 소규모 공장이나 사무실 등에서 난방과 더불어 음용수로 사용하더라도 손색이 없는 온수를 제공할 수 있게 하기 위한 것이다.The present invention relates to an electric boiler, and more particularly, to provide hot water without compromising even when used as drinking water in addition to heating in a dormitory or inn, a small factory or an office.

또한, 본 고안의 전기보일러는 심야 전기를 이용하도록 함에 따라 화석연료(석유나 경유, 벙커C유, 가스 등등을 말함)에 비하여 유지비가 매우 저렴하게 들고, 또 대기오염을 예방할 수 있게 됨으로써 환경친화 적임은 물론, 소음이 극소화되는 전기보일러를 제공할 수 있게 된다In addition, the electric boiler of the present invention is very environmentally friendly by being able to use the electricity at night, which is very inexpensive to maintain compared to fossil fuels (petroleum, diesel, bunker C oil, gas, etc.) and prevents air pollution. It is possible to provide an electric boiler that is not only suitable but also minimizes noise.

주지된 바와같이 보일러는 동절기에 실내를 가열하기 위해 사용되는 기구로, 열원을 석유나 경유, 벙커C유 등등과 같은 연료를 사용하는 보일러를 통상기름 보일러라고 칭하고, LPG와 LNG 가스등을 이용하는 보일러는 가스보일러라고 하며, 근래에는 거의 사용되지 않지만 석탄이나 갈탄을 이용하는 보일러는 석탄보일러 라고 한다.As is well known, a boiler is an apparatus used to heat a room in winter, and a boiler using a heat source such as petroleum, diesel, bunker C oil, etc. is usually called an oil boiler, and a boiler using LPG and LNG gas is used. It is called a gas boiler, and a boiler using coal or lignite is rarely used in recent years, but it is called a coal boiler.

그러나 전술한 종래의 보일러들은 모두 화석연료를 사용함에 따라, 연소시 대기오염물질이 발생할 수 밖에 없어 대기오염을 가속화 시키게 되고, 또 한정된 지하자원들을 가공하여 이용함에 따라 오래가지 않아 고갈될 위험에 처해 있음은 물론 유지관리비가 상당히 고가로 드는 폐혜가 따른다.However, all the above-described conventional boilers use fossil fuels, and thus, air pollutants are generated during combustion, thereby accelerating air pollution, and endangering them for a long time by processing limited underground resources. Of course, the maintenance costs are quite expensive, which is a disadvantage.

또한, 전술한 보일러들의 구조를 보면, 연소실 외부에서 상측에 열수 순환파이프가 연결설치되어 가열된 열수가 난방배관을 통하여 실내 배관을 순환하고, 상기 열수순환 파이프의 외부측에 온수탱크가 위치하여 온수가열이 이루어지게끔 구성되어 있는바, 이는 열수의 순환은 원활하게 이루어지게끔 구성된 반면, 온수는 탱크내에 저장된 상태에서 가열되는 상태여서 오래가지 않아 스케일, 이물질 등이 발행할 수 밖에 없기에 단순히 샤워나 설겆이 용도로 사용할 수는 있지만 음용수나 설겆이후 행굼 또 조리용으로는 사용할 수 없는 등의 문제점이 따랐다.In addition, in the structure of the above-described boiler, the hot water circulation pipe is connected to the upper side from the outside of the combustion chamber, the heated hot water circulates the indoor pipe through the heating pipe, the hot water tank is located on the outside of the hot water circulation pipe It is configured to be heated, which is configured to facilitate the circulation of hot water, while hot water is heated in the state stored in the tank, so it does not last long, so scales, foreign substances, etc. can only be issued. It could be used for dishwashing purposes, but there were problems such as drinking water, dishwashing after washing, and cooking.

따라서 본 발명은 전술한 종래의 제반문제점을 감안하여 발명한 것으로,Therefore, the present invention was invented in view of the above-mentioned conventional problems.

특히 환경오염(특히 대기오염)의 염려가 전혀 없고, 또 심야전력을 이용할 수 있도록 함으로써, 유지비가 저렴하게 들며, 온수를 음용수로 직접사용할 수 있도록 함으로써, 난방을 비롯하여 유지및 사용이 매우 편리하고 위생적인 사용과 관리가 가능한 전기보일러를 제공하려는데 그 목적이 있는 것이다.In particular, there is no concern about environmental pollution (especially air pollution), and it is possible to use the midnight electric power, and the maintenance cost is low, and the hot water can be directly used as drinking water. The aim is to provide an electric boiler that can be used and managed in a regular manner.

도 1은 본 발명의 종단면예시도.1 is a longitudinal cross-sectional view of the present invention.

도 2는 도 1의 A-A'선 단면예시도.2 is a cross-sectional view taken along the line AA ′ of FIG. 1.

도 3은 도 1의 B에서본 측면도.3 is a side view seen from B of FIG.

도 1은 본 발명의 종단면 예시도이고, 도 2는 도 1의 A-A'선 단면예시도. 도 3은 도 1의 B에서 본 측면도이다.1 is a longitudinal cross-sectional view of the present invention, Figure 2 is a cross-sectional view taken along the line AA 'of FIG. 3 is a side view seen from B of FIG. 1.

상기 도 1-도 3에서 보는 바와같이 본 발명은 일측면 하부와 상부에 입수관(2)과 출수관(2')을 가진 동체(1) 내부 바닥에 전기에 의해 고열을 발생하는 히터봉(3)을 설치(상기 히터봉은 동체의 크기나 사용목적에 따라 1~ 대 여섯개 이상 설치 사용할 수 있음) 하고, 상기 히터봉(3) 상측에 온수관을 코일형식으로 감아서된 코일형 온수관(4)(4') 두개를 연결관(5)을 이용하여 직렬 연결하되, 코일형 온수관(4) 선단부는 냉수 입수관(4a)의 작용을 하게하고, 코일형 온수관(4') 후미는 온수배출관(4a')의 작용을 하게끔 동체(1) 밖으로 인출시키며, 동체(1) 내부자체가 상기 히터봉(3)의 작용에 의해 직접 가열되게끔 난방용 열수탱크로서의 작용을 하게끔 하였다.As shown in FIGS. 1 to 3, the present invention provides a heater rod that generates high heat by electricity on an inner bottom of a body 1 having an inlet pipe 2 and an outlet pipe 2 'at one side and a lower side thereof. 3) (The heater rods can be used to install more than 1 ~ 6 units depending on the size and purpose of the fuselage), and coiled hot water pipe wound by winding the hot water pipe in the coil type on the heater rod (3) (4) (4 ') are connected in series using the connecting pipe (5), the tip of the coiled hot water pipe (4) to act as a cold water inlet pipe (4a), coiled hot water pipe (4') The rear end was drawn out of the fuselage 1 to act as the hot water discharge pipe 4a ', and acted as a hot water tank for heating so that the fuselage 1 itself was directly heated by the action of the heater rod 3.

또한, 상기 동체(1) 외부에는 단열 보온재(6)를 설치하여 열손실을 예방하고, 동체(1) 외부에 온도게이지(도시하지 않음) 압력게이지(도시하지 않음) 등이 설치 되는 것은 기본적 필수구성이기 때문에 도시하지 않았으며, 열수를 난방배관으로 순환시킬때 펌프 및 온도센서(도시하지 않음)를 이용하여 제어하는 것도 필수구성 이기 때문에 도시를 생략하였다.In addition, the thermal insulation (6) is installed outside the fuselage (1) to prevent heat loss, and the temperature gauge (not shown) pressure gauge (not shown) and the like installed on the exterior of the fuselage 1 is basically essential. It is not shown because of the configuration, and the illustration is omitted because it is also essential to control by using a pump and a temperature sensor (not shown) when circulating the hot water to the heating pipe.

미설명 부호 7은 받침프레임, 8은 지지봉이다.Reference numeral 7 is a support frame, 8 is a support rod.

이와같이 구성된 본 발명은, 전원에 의해 동체(1) 내부에 설치된 히터봉(3)이 발열하게 되어 동체(1) 내부의 물을 신속하게 가열시키게 되고, 또 냉수 입수관(4a)을 통해 상수도 물을 공급시키면, 상수도 물이 코일형 온수관(4)(4')을통과하면서 히터봉(3)에 의해 가열된 열수에 의해 코일형 온수관(4)(4')을 통과하는 물이 가열되게 된다.According to the present invention configured as described above, the heater rod 3 installed inside the fuselage 1 by the power source generates heat, thereby rapidly heating the water in the fuselage 1, and also through the cold water inlet pipe 4a. Is supplied, the water passing through the coiled hot water pipes 4 and 4 'is heated by the hot water heated by the heater rod 3 while the tap water passes through the coiled hot water pipes 4 and 4'. Will be.

또, 상기 온수관이 코일형으로 되게끔 구성한 것은 냉수 입수관(4a)을 통하여 공급된 물이 동체(1) 내부에서 가급적 오랜시간 동안 체류하여 신속하게 온수로 되게 하기 위함이며, 따라서 상기 코일형 온수관(4)(4')은 다수개로 구비하여 직렬 연결하거나 권회량을 늘리면 더더욱 효과가 뛰어나게 된다.In addition, the hot water pipe is configured to be coiled in order to allow the water supplied through the cold water inlet pipe 4a to stay in the fuselage 1 for as long as possible to quickly become hot water, and thus the coil type. Hot water pipes (4) (4 ') is provided with a plurality of series connection or increase the amount of winding is more excellent effect.

다시 말하면, 동체(1) 내부의 물이 가열되어 있는 상태에서 냉수입수관(4a)을 통하여 냉수를 공급시킴과 동시에 온수배출관(4a')으로 바로 배출시킨다 하더라도 냉수가 통과 되어 온수배출관(4a')까지 나오는 관의 길이가 상당히 길어 이 과정에서 바로 온수로 될 수 있게 된다는 것이다.In other words, even when the water inside the fuselage 1 is heated, the cold water is supplied through the cold water inlet pipe 4a and discharged directly to the hot water discharge pipe 4a ', even though the cold water passes through the hot water discharge pipe 4a'. The length of the tube up to) is quite long, so that the hot water can be used immediately.

따라서 온수 사용시 항상 안정적으로 연속사용 할 수 있어 동시에 여러사람이 많은량의 온수를 사용하더라도 안정적으로 연속사용 할 수 있게 되어, 일반가정은 물론, 여관, 호텔, 기숙사, 공장의 샤워장에서 효율적으로 사용 할 수 있게 된다.Therefore, when using hot water, it can be used continuously and stably at the same time, so that many people can use it continuously and stably, and it can be used efficiently in general homes, inns, hotels, dormitories, and showers of factories. You can do it.

또 본 발명은 코일형온수관(4)(4')에서 볼 수 있듯이 온수를 동체 내부의 열수로 인하여 자동형성하되, 저장하는 탱크개념이 아니고, 순환과정에서 자연스럽게 온수로 되게 끔 구성된 것이기에 코일형온수관(4)(4') 내부에 각종 스케일이나 이물질 등이 발생 할 염려가 전혀 없으며, 따라서 냉수 입수관(4a)으로 공급한 물이 상수도 물일 경우는 온수배출관(4a')으로 배출되는 물은 바로 먹어도 될 수 있는 음용수 수준이 되기 때문에 음용수, 취사용물로도 얼마든지 사용 할 수 있다.In addition, the present invention, as can be seen in the coil-type hot water pipe (4) (4 ') is automatically formed by the hot water in the fuselage, but not a tank concept for storing, it is configured to be naturally hot water in the circulation process coil type There is no fear that various scales or foreign substances are generated inside the hot water pipes 4 and 4 '. Therefore, when the water supplied to the cold water inlet pipe 4a is tap water, the water discharged to the hot water discharge pipe 4a'. Drinking water can be used as soon as drinking water, drinking water can be used as much.

그리고 본 발명에 있어서 무엇보다도 중요한 점은 심야전력을 이용하는 점이고, 따라서 전기 사용료가 저렴한 심야에 보일러를 가동시킴으로써 유지비용이 저렴하게 들며, 또 전기는 특성상 기존의 기름보일러나 가스보일러 같은 연소방식이 아니기 때문에 환경오염의 염려가 전혀 없다.And the most important point in the present invention is the use of midnight electric power, and thus, the maintenance cost is low by operating the boiler in the middle of the night with low electric charges, and the electricity is not a conventional combustion method such as an oil boiler or a gas boiler. Therefore, there is no concern about environmental pollution.

또한 히터봉(3)에 의해 물을 직접가열하는 방식이므로 열효율이 매우 뛰어나고, 더불어 가열이 신속하게 이루어지는 특징 또한 따르게 된다.In addition, since the method of directly heating the water by the heater rod 3, the thermal efficiency is very excellent, and the heating is also quickly followed.

이상 설명한 바와 같이 본 발명은 심야전기를 주로 이용 할 수 있어 유지비가 저렴하게 들고, 또 온수를 안정적으로 사용 할 수 있음과 동시에 음용수 또는 취사용으로도 온수를 사용 할 수 있음은 물론 열효율이 매우 뛰어나고 환경오염, 소음 등을 예방 할 수 있는 매우 유용한 발명인 것이다.As described above, the present invention mainly uses midnight electricity, and thus, maintenance costs are low, and hot water can be stably used, and hot water can also be used for drinking water or cooking, as well as excellent thermal efficiency. It is a very useful invention that can prevent pollution, noise, etc.

Claims (1)

일측면 하부와 상부에 입수관(2)과 출수관(2')을 가진 동체(1) 내부 바닥에 전기에 의해 고열을 발생하는 히터봉(3)을 다수 설치하고,A plurality of heater rods (3) generating high heat by electricity are installed in the bottom of the body (1) having water inlet pipe (2) and water outlet pipe (2 ') on one side lower part and upper part, 상기 히터봉(3) 상측에 온수관을 코일형식으로 감아서 된 코일형온수관(4)(4')을 연결관(5)을 이용하여 직렬연결하되, 코일형온수관(4) 선단부는 냉수입수관(4a)의 작용을 하게 하고, 코일형온수관(4') 후미는 온수배출관(4a')의 작용을 하게 끔 동체(1) 밖으로 인출시키며,The coil-shaped hot water pipe (4) (4 ') formed by winding the hot water pipe in the coil type on the upper side of the heater rod (3) is connected in series using the connecting pipe (5), and the tip of the coil-type hot water pipe (4) It acts as a cold water import pipe (4a), the coil-shaped hot water pipe (4 ') the tail is drawn out of the body (1) to act as a hot water discharge pipe (4a'), 동체(1) 외부에 통상의 단열보온재(6)를 설치하여 구성함을 특징으로 하는 전기보일러.An electric boiler, characterized in that the usual heat insulating material (6) is installed outside the body (1).
KR1020000062566A 2000-10-24 2000-10-24 Boiler KR20020031825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020000062566A KR20020031825A (en) 2000-10-24 2000-10-24 Boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020000062566A KR20020031825A (en) 2000-10-24 2000-10-24 Boiler

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR2020000029579U Division KR200215989Y1 (en) 2000-10-24 2000-10-24 Boiler

Publications (1)

Publication Number Publication Date
KR20020031825A true KR20020031825A (en) 2002-05-03

Family

ID=19695089

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020000062566A KR20020031825A (en) 2000-10-24 2000-10-24 Boiler

Country Status (1)

Country Link
KR (1) KR20020031825A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418057B1 (en) * 2001-09-06 2004-02-11 허행조 Energy-saving electric boiler
KR100722983B1 (en) * 2006-06-02 2007-05-30 남택용 Electric boiler

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58192331U (en) * 1982-06-18 1983-12-21 金 明「あ」 hot water boiler
KR880016593U (en) * 1987-02-25 1988-10-08 이양범 Electric heating boiler
KR880014327A (en) * 1987-05-12 1988-12-23 김용묵 Hot water heating combined use electric boiler
KR890023332U (en) * 1988-05-21 1989-12-02 김태익 Electric hot water heater
KR900001096Y1 (en) * 1987-02-02 1990-02-17 박남석 Stapler with function for punching
JPH1144494A (en) * 1997-07-23 1999-02-16 Mitsubishi Chem Eng Corp Heat storage device
KR19990024192A (en) * 1998-12-16 1999-03-25 김이교 Thermal fluid heated electric water heater
KR200215989Y1 (en) * 2000-10-24 2001-03-15 최병규 Boiler

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58192331U (en) * 1982-06-18 1983-12-21 金 明「あ」 hot water boiler
KR900001096Y1 (en) * 1987-02-02 1990-02-17 박남석 Stapler with function for punching
KR880016593U (en) * 1987-02-25 1988-10-08 이양범 Electric heating boiler
KR880014327A (en) * 1987-05-12 1988-12-23 김용묵 Hot water heating combined use electric boiler
KR890023332U (en) * 1988-05-21 1989-12-02 김태익 Electric hot water heater
JPH1144494A (en) * 1997-07-23 1999-02-16 Mitsubishi Chem Eng Corp Heat storage device
KR19990024192A (en) * 1998-12-16 1999-03-25 김이교 Thermal fluid heated electric water heater
KR200215989Y1 (en) * 2000-10-24 2001-03-15 최병규 Boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100418057B1 (en) * 2001-09-06 2004-02-11 허행조 Energy-saving electric boiler
KR100722983B1 (en) * 2006-06-02 2007-05-30 남택용 Electric boiler

Similar Documents

Publication Publication Date Title
CN204100217U (en) Power economized boiler
KR20110024746A (en) Boiler using heat medium oil
CN100547313C (en) A kind of thimble-tube boiler
KR200215989Y1 (en) Boiler
KR20020031825A (en) Boiler
CN2924394Y (en) Telescopic type boiler
KR20110030035A (en) Warm water heating tube for electric boiler and electric boiler using the same
RU59220U1 (en) HOUSEHOLD ELECTRIC HEATER
CN201251169Y (en) Highly-effective energy-saving steam generator
US1938441A (en) Water heater
KR101418924B1 (en) Induction Boiler
KR101365724B1 (en) A heating apparatus of heat pipe for boiler combination stove
CN106091381A (en) Built-in coil pipe energy storage heat-exchanging gas water heater
CN205655503U (en) Utilize spontaneous electric heat water system of gas and solar energy
KR100738374B1 (en) Vacuum electric boiler
CN201488228U (en) Quick water boiler
RU2333432C1 (en) Condensation universal water-heating installation of external accommodation
US1832332A (en) Hot top water heater
KR100343874B1 (en) Boiler
CN212319671U (en) Semiconductor steam generator
CN2328965Y (en) Improved household central heating water heater
RU2131562C1 (en) Gas stove running water heater
CN205227265U (en) Tubular steam boiler
RU202329U1 (en) Hot water boiler
CN201680426U (en) Water supply and drainage device of water heater

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee