KR200337486Y1 - A boiler with the defference of hydraulic pressure type a 3-way valve - Google Patents
A boiler with the defference of hydraulic pressure type a 3-way valve Download PDFInfo
- Publication number
- KR200337486Y1 KR200337486Y1 KR20-2003-0030295U KR20030030295U KR200337486Y1 KR 200337486 Y1 KR200337486 Y1 KR 200337486Y1 KR 20030030295 U KR20030030295 U KR 20030030295U KR 200337486 Y1 KR200337486 Y1 KR 200337486Y1
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- South Korea
- Prior art keywords
- direct
- way valve
- heat exchanger
- inlet
- outlet
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- 239000008236 heating water Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000005338 heat storage Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0235—Three-way-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0278—Expansion vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/08—Storage tanks
Landscapes
- 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)
- Water Supply & Treatment (AREA)
- Multiple-Way Valves (AREA)
Abstract
본 고안은 직수차압식 3방향 밸브를 구비한 보일러에 관한 것으로, 내부에 코일이 구비되어 입구(11) 및 출구(12)가 형성된 주열교환기(10)와; 상기 주열교환기(10)의 입구(11) 및 출구(12)와 연통되게 설치되고 직수 인입구(27)와 직수 토출구(28)가 형성되어 공급되는 직수에 의한 차압에 의해 난방수를 공급하거나 환수하도록 선택적으로 유로를 개폐하는 직수차압식 3방향 밸브(20)와; 상기 주열교환기(12)와 상기 직수차압식 3방향 밸브(20) 사이에 설치되어 난방수를 순환시키는 순환펌프(30)를 포함하여 구성함으로써 별도의 구동장치를 배제하는 직수차압식 3방향 밸브를 구비하여 고장율이 현저하게 낮아지고 유지보수가 용이해지고, 직수차압식 3방향 밸브의 구동원으로 직수를 사용하기 때문에 보일러의 제조 단가가 저렴해지며, 유로의 전환시 기밀성이 우수해지고, 전체 보일러의 사이즈를 줄일 수 있는 등의 효과가 있다.The present invention relates to a boiler having a direct water pressure type three-way valve, the main heat exchanger (10) having a coil inside and formed with an inlet (11) and an outlet (12); It is installed to communicate with the inlet 11 and outlet 12 of the main heat exchanger 10 and the direct inlet 27 and the direct outlet outlet 28 are formed to supply or return the heating water by the differential pressure by the direct water supplied. A direct water pressure type three-way valve 20 for selectively opening and closing the flow path; It is installed between the main heat exchanger 12 and the direct water pressure three-way valve 20 to include a circulation pump 30 for circulating the heating water by direct pressure three-way valve to eliminate the separate drive device The failure rate is remarkably lowered and the maintenance is easy, and since the direct water is used as the driving source of the direct pressure differential 3-way valve, the manufacturing cost of the boiler is low, the airtightness is excellent when the flow path is changed, and the size of the entire boiler is provided. It can reduce the effect.
Description
본 고안은 3방향 밸브를 구비하는 급탕식 보일러에 관한 것으로, 보다 상세하게는 별도의 구동원을 사용하지 않고 직수에 의한 차압을 이용하여 유로의 개폐동작을 실시하도록 한 직수차압식 3방향 밸브를 구비한 보일러에 관한 것이다.The present invention relates to a hot water boiler having a three-way valve, and more specifically, to the opening and closing operation of the flow path using a differential pressure by direct water without using a separate driving source, It's about a boiler.
종래 급탕식 가스보일러에 적용되는 3방향 밸브는 난방 또는 급탕 가동조건에 의해 주열교환기에서 가열된 난방수를 판형 열교환기측으로 연통시키는 제1위치와, 난방공급배관측으로 연통시키는 제2위치로 절환시켜주는 기능을 수행하며, 듀얼타입과 같은 2회로식이 아닌 난방, 급탕 겸용의 1회로식인 보일러에서는 필수 불가결함 부품이다.The three-way valve applied to the hot water type gas boiler switches to a first position communicating the heating water heated in the main heat exchanger to the plate heat exchanger side and a second position communicating the heating supply pipe side by heating or hot water operation conditions. It performs the function and is indispensable in the boiler, which is one-circuit type of heating and hot water supply, not dual circuit type like dual type.
이와 같은 3방향 밸브의 구동원은 대부분 소형 모터가 사용되지만 솔레노이드 밸브를 사용하는 경우도 있는데, 소형모터 또는 솔레노이드밸브를 이용하는 종래의 3방향 밸브는 제작 단가가 고가이며, 수명이 짧은 단점이 있었다.The driving source of such a three-way valve is mostly used a small motor, but the case of using a solenoid valve, the conventional three-way valve using a small motor or a solenoid valve has a disadvantage in that the manufacturing cost is expensive, short life.
따라서 종래의 보일러는 상기와 같은 고가의 3방향 밸브를 사용하거나, 서로 다른 방향으로 구동되는 2개의 순환펌프를 사용하기 때문에 전체 보일러의 제조 원가가 상승되는 문제가 있으며, 제품의 고장율이 높아 유지보수의 어려움이 있는 문제가 있다.Therefore, the conventional boiler uses the expensive three-way valve as described above, or because the use of two circulation pumps driven in different directions, there is a problem that the manufacturing cost of the entire boiler rises, the failure rate of the product is high maintenance There is a problem with difficulty.
이와 같은 문제점을 감안하여 안출한 본 고안의 목적은 직수에 의해 개폐되는 3방향 밸브를 구비하여 하나의 순환펌프에 의해서 보일러의 구동이 가능하도록 함으로써 제조 원가를 절감하도록 한 것이다.The object of the present invention devised in view of the above problems is to provide a three-way valve that is opened and closed by direct water to reduce the manufacturing cost by enabling the boiler to be driven by a single circulation pump.
본 고안의 다른 목적은 구조가 간소화된 3방향 밸브를 구비하여 제품의 성능을 향상시킴과 아울러 유지보수를 간편하게 실시하도록 한 것이다.Another object of the present invention is to provide a simplified three-way valve to improve the performance of the product as well as to simplify the maintenance.
도 1은 본 고안에 의한 직수차압식 3방향 밸브를 구비한 보일러의 일 실시예의 구성도.1 is a block diagram of an embodiment of a boiler having a three-way valve according to the present invention.
도 2는 본 고안에 적용되는 직수차압식 3방향 밸브의 단면도.Figure 2 is a cross-sectional view of the direct pressure differential type three-way valve applied to the present invention.
도 3은 본 고안의 다른 실시예의 구성도.3 is a block diagram of another embodiment of the present invention.
도 4는 본 고안의 또 다른 실시예의 구성도.Figure 4 is a block diagram of another embodiment of the present invention.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
10 ; 주열교환기 11,12 ; (주열교환기)의 입,출구10; Main heat exchangers 11, 12; Inlet and outlet of (main heat exchanger)
20 ; 직수차압식 3방향 밸브 21 ; 밸브 몸체20; Direct differential pressure 3-way valve 21; Valve body
21a ; 난방수 인입구 21b ; 난방수 토출구21a; Heating water inlet 21b; Heating water outlet
21c ; 난방공급 연결구 22 ; 축21c; Heating connector 22; shaft
23 ; 패킹 24 ; 실린더23; Packing 24; cylinder
25 ; 피스톤 26 ; 마개25; Piston 26; stopper
27 ; 직수 인입구 28 ; 직수 토출구27; Direct inlet 28; Direct discharge port
29 ; 스프링 30 ; 순환펌프29; Spring 30; Circulation pump
40 ; 축열탱크 50 ; 팽창탱크40; Heat storage tank 50; Expansion tank
상기 목적을 달성하기 위한 본 고안은 내부에 코일이 구비되어 입구 및 출구가 형성된 주열교환기와; 상기 주열교환기의 입구 및 출구와 연통되게 설치되고 직수 인입구와 직수 토출구가 형성되어 공급되는 직수에 의한 차압에 의해 난방수를 공급하거나 환수하도록 선택적으로 유로를 개폐하는 직수차압식 3방향 밸브와; 상기 주열교환기와 상기 직수차압식 3방향 밸브 사이에 설치되어 난방수를 순환시키는 순환펌프를 포함하여 구성한 것을 특징으로 한다.The present invention for achieving the above object is provided with a coil inside the main heat exchanger and the inlet and outlet formed; A direct pressure differential 3-way valve installed in communication with the inlet and the outlet of the main heat exchanger, and configured to open and close the flow path selectively to supply or return the heating water by the differential pressure of the direct water inlet and the direct discharge outlet; It is characterized by comprising a circulating pump installed between the main heat exchanger and the direct water differential pressure three-way valve to circulate the heating water.
여기서, 본 고안의 상기 직수차압식 3방향 밸브는 난방수 인입구 및 난방수 토출구와 난방공급 연결구가 형성된 밸브 몸체와, 밸브 몸체의 중앙에 설치되어 왕복운동하는 축과, 상기 축의 선단에 구비되어 난방수 인입구와 난방공급 연결구를 연통시키는 제1위치와 난방수 인입구와 난방수 토출구를 연통시키는 제2위치로 가변되는 패킹과, 상기 밸브 몸체의 후단부에 연통되게 설치되며 상기 직수 토출구가 형성된 실린더와, 상기 축의 후단에 설치되어 상기 실린더 내에서 왕복이동하는 피스톤과, 상기 실린더의 후단부에 설치되어 상기 직수 인입구가 형성된 마개와, 상기 밸브 몸체와 피스톤 사이에 개재되는 스프링을 포함하여 구성된 것이 바람직하다.Here, the direct differential pressure type three-way valve of the present invention is provided with a valve body having a heating water inlet, a heating water discharge port, and a heating supply connector, an axis installed in the center of the valve body to reciprocate, and provided at the tip of the shaft for heating. A packing variable to a first position communicating the male inlet and the heating supply connection port and a second position communicating the heating inlet and the heating water discharge port, and installed in communication with the rear end of the valve body and having a cylinder having the direct water outlet port; And a piston installed at the rear end of the shaft and reciprocating in the cylinder, a stopper provided at the rear end of the cylinder and having a direct inlet formed therein, and a spring interposed between the valve body and the piston. .
이하, 본 고안의 바람직한 실시예를 첨부도면에 의거하여 설명한다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
도 1은 본 고안의 일 실시예에 의한 보일러의 구성도로서, 내부에 코일이 구비된 주열교환기(10)와, 주열교환기(10)의 입구(11) 및 출구(12)와 연통되게 설치되고 직수 인입구(21)와 직수 토출구(22)가 형성된 직수차압식 3방향 밸브(20)와, 주열교환기의 출구(12)와 연통되는 상기 직수차압식 3방향 밸브(20)와의 연결라인에 설치되는 순환펌프(30)로 구성되어 있다.1 is a configuration diagram of a boiler according to an embodiment of the present invention, and installed in communication with a main heat exchanger 10 having a coil therein and an inlet 11 and an outlet 12 of the main heat exchanger 10. A direct differential pressure type 3-way valve 20 having a direct inlet 21 and a direct discharge port 22 formed therein; and a connection line between the direct pressure differential 3-way valve 20 communicating with an outlet 12 of the main heat exchanger. The circulation pump 30 is comprised.
상기 직수차압식 3방향 밸브(20)는 도 2에 도시한 바와 같이, 주열교환기(10)에 연결되는 난방수 인입구(21a)와 난방수 토출구(21b)가 형성되고 아울러 난방공급 연결구(21c)가 형성된 밸브 몸체(21)와, 밸브 몸체(21)의 중앙에 설치되어 왕복운동하는 축(22)과, 상기 축(22)의 선단에 구비되어 난방수 인입구(21a)와 난방공급 연결구(21c)를 연통시키는 제1위치(A)와 난방수 인입구(21a)와 난방수 토출구(21b)를 연통시키는 제2위치(B)로 가변되는 패킹(23)으로 구성되어 있다.As shown in FIG. 2, the direct water differential pressure three-way valve 20 has a heating water inlet 21a and a heating water outlet 21b connected to the main heat exchanger 10, and a heating supply connector 21c. Is provided in the valve body 21, the shaft 22 which is installed at the center of the valve body 21 and reciprocating, and is provided at the tip of the shaft 22, the heating water inlet 21a and the heating supply connector 21c ) Is composed of a packing 23 which is varied in a first position A in communication with the second position, a second position B in communication with the heating water inlet 21a and the heating water discharge port 21b.
또한, 밸브 몸체(21)의 후단부에는 실린더(24)가 연통되게 설치되어 있고, 상기 축(22)의 후단에는 실린더(24) 내에서 왕복이동하는 피스톤(25)이 연결설치되어 있으며, 실린더(24)의 후단부에는 마개(26)가 밀봉되어 있고, 마개(26)에는 직수 인입구(27)가 형성되어 있으며, 실린더(24)에는 직수 토출구(28)가 형성되어 있고, 실린더(24)와 피스톤(25) 사이에는 직수 압력에 대하여 탄발력이 작용되도록 스프링(29)이 설치되어 있다.In addition, a cylinder 24 is connected to the rear end of the valve body 21, and a piston 25 reciprocating in the cylinder 24 is connected to the rear end of the shaft 22. A stopper 26 is sealed at the rear end of the 24, a direct inlet 27 is formed at the stopper 26, a direct discharge outlet 28 is formed at the cylinder 24, and the cylinder 24 is provided. The spring 29 is provided between the piston and the piston 25 so that the elastic force is applied to the direct pressure.
이와 같이 구성되어 있는 직수차압식 3방향 밸브를 구비한 본 고안에 의한보일러의 작동을 설명한다.The operation of the boiler according to the present invention having the direct water pressure type three-way valve configured as described above will be described.
먼저, 난방조건시(급탕 미사용)에는 직수차압식 3방향 밸브(20)의 직수 인입구(27)측의 압력(P1) = 직수 토출구(28)측의 압력(P2)이므로, 스프링(29)의 탄성력에 의해 패킹(23)이 제1위치(A)에 위치하고 있어 주열환기의 출구(12)로부터 공급되는 난방수는 순환펌프(30)에 의해 가압된 후에 난방수 인입구(21a)로 유입되어 난방공급 연결구(21c)를 통해 토출되어 난방이 실시된다.First, in the heating condition (no hot water supply), the pressure P1 on the side of the direct inlet port 27 of the direct water differential pressure type three-way valve 20 = the pressure P2 on the side of the direct outlet port 28, so that the spring 29 The packing 23 is located at the first position A by the elastic force, and the heating water supplied from the outlet 12 of the main heat vent is pressurized by the circulation pump 30 and then flows into the heating water inlet 21a to be heated. It is discharged through the supply connector 21c and heating is performed.
또한, 급탕조건시에는 직수 인입구(27)측의 압력(P1) > 직수 토출구(28)측 압력(P2)인 상태이므로, 직수 인입구(27)측의 압력(P1)에 의하여 피스톤(25)이 가압되어 축(22)이 밸브 몸체(21) 내에서 이동되어 패킹(23)이 원위치인 제1위치(A)에서 제2위치(B)로 이동된다.In the hot water supply condition, since the pressure P1 on the side of the water inlet 27> the pressure P2 on the side of the water discharge port 28, the piston 25 is driven by the pressure P1 on the side of the water inlet 27. Pressurized and the shaft 22 is moved in the valve body 21 so that the packing 23 is moved from the first position A, which is the original position, to the second position B. FIG.
따라서 주열교환기(10)의 출구(12)로부터 공급되는 난방수는 순환펌프(30)에 의해 가압된 후에 난방수 인입구(21a)로 유입되어 난방수 토출구(21b)로 토출됨으로써 주열교환기(10)로 난방환수된다.Therefore, the heating water supplied from the outlet 12 of the main heat exchanger 10 is pressurized by the circulation pump 30 and then flows into the heating water inlet 21a and is discharged to the heating water outlet 21b to thereby heat the main heat exchanger 10. Heating is returned to
도 3은 본 고안의 다른 실시예에 의한 보일러로서, 주열교환기(10)와 직수차압식 3방향 밸브(20) 사이에 축열탱크(40)가 설치되어 있어 축열탱크(40)에서 직수차압식 3방향 밸브(20)로 난방수와 직수인 냉수가 유입되도록 구성되어 있다. 이와 같은 본 고안의 다른 실시예의 작동은 주열교환기(10)의 출구(12)측에서 토출된 난방수가 축열탱크(40)를 거쳐 직수차압식 3방향 밸브(20)로 연통되어 다시 주열교환기(10)의 입구(11)로 유입됨을 반복하게 되며, 축열탱크(40)에는 별도의 라인을 통해 냉수가 공급되어 열교환됨으로써 온수가 토출된다.3 is a boiler according to another embodiment of the present invention, and the heat storage tank 40 is installed between the main heat exchanger 10 and the direct pressure differential 3-way valve 20, and the direct pressure differential type 3 in the heat storage tank 40 is shown. It is comprised so that the cold water which is direct water and heating water may flow into the directional valve 20. The operation of another embodiment of the present invention as described above, the heating water discharged from the outlet 12 side of the main heat exchanger 10 is communicated to the direct-pressure differential three-way valve 20 via the heat storage tank 40, the main heat exchanger 10 It is repeated to flow into the inlet 11 of the), the cold water is supplied to the heat storage tank 40 through a separate line heat exchange is discharged.
도 4는 본 고안의 또 다른 실시예의 보일러를 도시한 것으로 주열교환기(10)에서 직수차압식 3방향 밸브(20)로 유입되는 연결라인에 축열탱크(40)를 설치함과 아울러 직수차압식 3방향 밸브(20)에서 주열교환기(10)로 유입되는 연결라인에는 팽창탱크(50)를 구비하여 축열탱크(40)로부터 공급되는 난방수가 직수차압식 3방향 밸브(20)에 의해 팽창탱크(50)를 거쳐 주열교환기(10)로 유입되며, 주열교환기(10)에서 다시 축열탱크(40)로 순환되어진다.Figure 4 shows a boiler of another embodiment of the present invention as well as installing the heat storage tank 40 in the connection line flowing from the main heat exchanger 10 to the direct pressure differential 3-way valve 20 The connection line flowing from the directional valve 20 to the main heat exchanger 10 is provided with an expansion tank 50 so that the heating water supplied from the heat storage tank 40 is expanded by the direct pressure three-way valve 20. Inflow to the main heat exchanger 10, and is circulated back to the heat storage tank 40 in the main heat exchanger (10).
이상에서 설명한 바와 같이, 본 고안에 의한 직수차압식 3방향 밸브를 구비한 보일러는 별도의 구동장치를 배제하는 직수차압식 3방향 밸브를 구비하여 고장율이 현저하게 낮아지고 유지보수가 용이한 효과가 있으며, 직수차압식 3방향 밸브의 구동원으로 직수를 사용하기 때문에 보일러의 제조 단가가 저렴해지는 이점이 있다.As described above, the boiler with a direct differential pressure three-way valve according to the present invention is provided with a direct differential pressure three-way valve excluding a separate driving device, the failure rate is significantly lowered, and the maintenance is easy. In addition, since the direct water is used as a driving source of the direct pressure differential 3-way valve, the manufacturing cost of the boiler is reduced.
또한, 직수차압식 3방향 밸브가 직선운동에 의해 선택적 개폐 방식을 채용하고 있기 때문에 유로의 전환시 기밀성이 우수해지는 효과가 있고, 직수차압식 3방향 밸브가 소형화되기 때문에 전체 보일러의 사이즈를 줄일 수 있는 이점이 있다.In addition, since the direct pressure differential 3-way valve adopts a selective opening / closing method by linear motion, the airtightness is excellent when switching the flow path, and the size of the entire boiler can be reduced because the direct pressure differential 3-way valve is miniaturized. There is an advantage to that.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2003-0030295U KR200337486Y1 (en) | 2003-09-25 | 2003-09-25 | A boiler with the defference of hydraulic pressure type a 3-way valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20-2003-0030295U KR200337486Y1 (en) | 2003-09-25 | 2003-09-25 | A boiler with the defference of hydraulic pressure type a 3-way valve |
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| Publication Number | Publication Date |
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| KR200337486Y1 true KR200337486Y1 (en) | 2003-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101421254B1 (en) | 2013-04-01 | 2014-07-21 | 한국지역난방공사 | District heating three-way differential pressure control valve for heating and hot water supply for proportional control based on amount of heating and hot water |
| CN108443944A (en) * | 2018-04-17 | 2018-08-24 | 上海林内有限公司 | Energy mix direct supply system |
-
2003
- 2003-09-25 KR KR20-2003-0030295U patent/KR200337486Y1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101421254B1 (en) | 2013-04-01 | 2014-07-21 | 한국지역난방공사 | District heating three-way differential pressure control valve for heating and hot water supply for proportional control based on amount of heating and hot water |
| CN108443944A (en) * | 2018-04-17 | 2018-08-24 | 上海林内有限公司 | Energy mix direct supply system |
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