WO2011068312A2 - Capteur de débit et dispositif de combustion en comportant - Google Patents
Capteur de débit et dispositif de combustion en comportant Download PDFInfo
- Publication number
- WO2011068312A2 WO2011068312A2 PCT/KR2010/007957 KR2010007957W WO2011068312A2 WO 2011068312 A2 WO2011068312 A2 WO 2011068312A2 KR 2010007957 W KR2010007957 W KR 2010007957W WO 2011068312 A2 WO2011068312 A2 WO 2011068312A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flow sensor
- flow
- sensor
- fluid
- combustion device
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 56
- 238000005192 partition Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 7
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
-
- 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
-
- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
- G01F1/115—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission with magnetic or electromagnetic coupling to the indicating device
-
- 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
- F24D2220/04—Sensors
- F24D2220/044—Flow sensors
Definitions
- the present invention relates to a flow sensor for detecting the flow rate of the fluid flowing into the combustion device, such as a water heater or boiler, and filtering and purifying the foreign matter contained in the fluid, and more specifically, a combustion device piping
- the flow sensor is designed to be easily installed and detached on the body to facilitate the maintenance work of the internal components of the flow sensor and to increase the capacity of the filter installed on the pipe of limited length. And it relates to a combustion device having the same.
- Combustor having a configuration that can heat the water by using the burner in the combustion chamber includes a boiler and a water heater.
- a boiler used in a general home or a public building is used for heating or hot water
- a water heater is a device configured to enable the user to conveniently use hot water by heating cold water to a predetermined temperature within a short time.
- 1 is a schematic view showing the configuration of a conventional water heater.
- the direct water flowing into the heat exchanger (8) is heated by heat exchange with combustion heat generated by the air and gas supplied from the blower (6) by the burner (7) to heat the hot water supply pipe (9) Is discharged through, on the hot water supply pipe (9) is provided with a flow control valve (4) for adjusting the supply flow rate of hot water.
- a bypass pipe 5a is connected between the direct water inflow pipe 5 and the hot water supply pipe 9 to directly transfer the introduced direct water to the hot water supply pipe 9 without passing through the heat exchanger 8. It is configured to control the temperature of the hot water by mixing the hot water and direct water heated through the), the mixing valve 3 is provided on the bypass pipe (5a) is a direct water conveyed through the bypass pipe (5a) To control the flow rate.
- FIG. 2 is a cross-sectional view showing the internal configuration of a conventional flow sensor.
- the conventional flow sensor 1 is provided with a moving passage of the fluid therein, the body 10 formed to face the inlet 11 and the outlet 12 of the fluid and the flow of fluid flowing into the inlet 11
- Rotor 20 that rotates inside the body 10 by, the rotation center of the rotor 20 and the rotation axis 30 is coupled to a plurality of rotary blades 25 around the circumference, and the body 10
- the holder 40 is fixed to support the rotating shaft 30, and the Hall sensor 60 for sensing the rotational speed of the magnet 50 provided on one side of the rotary blade 25.
- One side of the rotor blade 25 of the rotor 20 is provided with a magnet 50, the N pole and the S pole cross each other, the rotor 20 is rotated so that the magnet pole (N pole and S pole cross each time) In 50), a magnetic signal is generated.
- the hall sensor 60 is installed at one side of the body 10 at a predetermined distance from the magnet 50 to generate a frequency pulse corresponding to the magnetic signal generated from the magnet 50, and the controller ( In the drawing), the frequency pulse of the Hall sensor 60 is input to adjust the flow rate of the fluid based on the set flow rate.
- the conventional flow sensor 1 having such a configuration separates the flow sensor 1 from the pipe in order to remove metal foreign matter stuck to the magnet 50 provided in the rotary blade 25 after being used for a predetermined period. Maintenance work will be performed.
- the conventional flow sensor 1 has a structure in which the inlet 11 and the outlet 12 are coupled to both sides on the direct inlet pipe 5 so as not to be easy to separate, and to have an integral body.
- Rotor 20 is provided in the interior of the (10) has a problem that the cleaning of the rotary blade 25 is not easy even if the flow sensor 1 is separated from the inflow pipe (5).
- the conventional flow sensor 1 is manufactured and installed as a separate component separate from the filter 2, there was a problem that the number of components inside the water heater increases.
- the filter (2) is installed in the form of a net in the direction perpendicular to the flow direction of the direct inflow pipe (5) in order to increase the capacity of the filter (2) to form a long straight section of the pipe in which the filter (2) is installed Since there must be a problem in the space constraints for installing the filter (2).
- the present invention has been made in order to solve the above problems, the flow sensor and the filter is composed of a single component, to facilitate the installation and separation in the piping body of the combustion machine to facilitate the maintenance work inside the flow sensor It is an object of the present invention to provide a flow sensor and a combustion device having the same that can be performed easily.
- Another object of the present invention is to provide a flow sensor having a structure capable of maximizing the capacity of the filter on a pipe of a limited length and a combustion device having the same.
- the flow sensor of the present invention for realizing the object as described above, in the flow sensor consisting of a mechanical unit moving mechanically in accordance with the flow of the fluid, and a sensor unit for detecting the movement of the mechanical unit, the sensor unit It is installed outside the pipe, the mechanism is characterized in that installed in a position corresponding to the sensor unit in the pipe inside the combustion device.
- the mechanism part, the movement passage of the fluid is provided therein and the inlet and the outlet of the fluid is formed opposite to the body, and the center of rotation of the rotor to rotate in accordance with the flow of the fluid in the body to form a plurality of rotary wings around the coupling It consists of an upper cover that is coupled to the upper side of the body while supporting the upper end of the rotating shaft, the sensor unit, characterized in that consisting of a Hall sensor for sensing the rotational speed of the magnet provided on one side of the rotary blade.
- a cone-shaped filter is inserted in the longitudinal direction on the fluid passage in the body.
- the body includes a cylindrical upper body portion in which the filter is accommodated; and an inlet is formed between a plurality of partition walls extending downwardly inclined radially downward at intervals in a circumferential direction from a lower end portion of the upper body portion, and the plurality of partition walls
- the lower end of the lower body portion is connected to the horizontal horizontal flange portion; characterized in that consisting of.
- O-ring is coupled between the outer surface of the lower end of the filter and the inner surface of the lower end of the upper body portion.
- a plurality of locking portions protrude radially from the lower end of the filter, the movement of the filter in the flow direction of the fluid is caught by the lower end of the upper body portion located in the inlet.
- the inner surface of the upper cover is characterized in that the flow rate adjustment ring for adjusting the cross-sectional area of the outlet by the pressure of the fluid is further provided.
- Combustion apparatus having a flow sensor according to the present invention, the flow sensor; and a first connection portion coupled to the connection pipe inflowing direct water from the combustion device, the first connection portion is in communication with the first connection portion downward from one side And a pipe body having a second connection part which is inclined to extend to be exposed to the outside of the combustion device housing and to which the flow sensor is inserted and coupled.
- a lower cover is coupled to a lower end of the second connector.
- the flow sensor and the combustion apparatus having the same since the flow sensor can be easily separated and combined from the piping body of the combustion device, the cleaning and maintenance of the internal components can be easily performed. There is this.
- the installation structure of the combustion device is simplified, and the filter capacity is increased by taking the structure in which the cone-shaped filter is inserted in the longitudinal direction of the inside of the flow sensor. And it has the advantage of reducing the installation space constraints of the filter.
- 1 is a schematic view showing the configuration of a conventional water heater
- FIG. 2 is a cross-sectional view showing the internal configuration of a conventional flow sensor
- FIG. 3 is a cross-sectional view showing an internal configuration of a flow sensor according to the present invention.
- FIG. 4 is an exploded perspective view of a flow sensor according to the present invention.
- FIG. 5 is a plan view of a flow sensor according to the present invention.
- FIG. 6 is a cross-sectional view A-A of FIG.
- FIG. 7 is a cross-sectional view showing a state in which the flow sensor is installed in the combustion device.
- outlet 110 body portion
- Hall sensor 180 filter
- combustion device 310 combustion device housing
- piping body 321 first connection portion
- Figure 3 is a cross-sectional view showing the internal configuration of the flow sensor according to the invention
- Figure 4 is an exploded perspective view of the flow sensor according to the invention
- Figure 5 is a plan view of the flow sensor according to the invention
- Figure 6 is a AA reference cross-sectional view of Figure 3 to be.
- the flow sensor 100 is assembled into a single part by assembling a flow sensor for detecting the flow rate of the direct water flowing into the combustion device such as a water heater or a boiler and a filter for filtering and purifying foreign substances contained in the direct water.
- the mechanism part of the flow sensor 100 is inserted into the pipe body 320 extending to one side of the connection pipe in which the direct water flows into the structure, which makes the coupling and separation easy, and the sensor part that detects the movement of the mechanism part. It is characterized in that installed on the outside of the piping body 320.
- the mechanism portion of the flow sensor 100 as a mechanically moving portion in accordance with the flow of the fluid, the fluid introduced through the inlet 101 formed in the lower portion
- Rotation in the body 110 by the flow of the fluid passing through the body 110 and the body 110 is provided with a moving passage of the fluid therein to pass toward the outlet 102 formed in the upper portion 110
- the rotor 150 and the rotor 150 to form the center of rotation and the circumference to support the upper end of the rotating shaft 152 coupled with a plurality of rotary blades 154 can be coupled and separated to the upper side of the body 110
- the upper cover 140 and the holder 160 is fixed to the inside of the body 110 while supporting the lower end of the rotating shaft 152.
- a cone-shaped filter 180 is inserted and installed in the longitudinal direction on the fluid movement path inside the body 110 to maximize the filtering area.
- the body 110 is a cylindrical upper body portion 120, the rotor 150 and the filter 180 is accommodated therein, and the lower body portion 130 is formed to extend to the lower side of the upper body portion 120 )
- the lower body portion 130 has a plurality of partitions 132 are formed to extend radially inclined at intervals along the circumferential direction from the lower end of the upper body portion 120 inlet 101 between the plurality of partitions 132.
- the lower end of the partition wall 132 is connected to the circular horizontal flange portion 135.
- the upper body part 120 may have a cylindrical shape in which an upper part in which the rotor 150 is accommodated and a lower part in which the filter 180 is accommodated have different diameters.
- O-ring 181 is coupled between the outer surface of the lower end of the filter 180 and the inner surface of the lower end of the upper body portion 120, the filter 180 is moved upward from the lower side of the lower body portion 130
- the O-ring 181 When the insert is inserted into the upper body portion 120 to be coupled to each other by the O-ring 181, the lower end of the filter 180 and the lower end of the upper body portion 120 are fitted and fixed to each other.
- a plurality of locking portions 185 are radially protruded from the lower end of the filter 180, so that the locking portions (as shown in FIG. 5) when the filter 180 is inserted into the upper body portion 120. 185 is caught by the lower end of the upper body portion 120 located in the inlet 101, thereby limiting the movement of the filter 180 is pushed in the flow direction of the fluid.
- the filter 180 having a cone shape in the longitudinal direction is inserted and fixed on the fluid movement passage inside the upper body portion 120, the filter is installed in the vertical direction on the fluid movement passage. Compared to this, the filter capacity can be increased while simplifying the structure.
- the present invention is characterized in that the upper cover 140 for supporting the rotating shaft 152 of the rotor 150 made of a structure that can be separated to the upper side of the upper body portion 120.
- a stepped portion is formed at the lower end of the upper cover 140 so that the upper cover 140 is inserted into the upper end of the upper body part 120 to be coupled, and the outer side and the upper body part 120 of the lower part of the upper cover 140 are coupled to each other.
- O-ring 142 is coupled between the inner side of the upper end of the close contact is kept tight.
- the upper cover 140 and the upper body portion 120 may be configured to be coupled in a screwing manner.
- the upper cover 140 and the upper body portion 120 is made of a detachable structure as described above, after the upper cover 140 is separated from the upper body portion 120, the upper cover 140 and the upper body portion 120 are installed inside the upper body portion 120. Since the rotor 150 can also be drawn out, it is possible to easily remove the foreign matter attached to the rotary blade 154 and the magnet 156.
- reference numerals 121 and 141 denote O-rings for maintaining airtightness when the flow sensor 100 is inserted into and coupled to the pipe body 320 to be described later.
- the flow sensor 100 detects the flow rate and in addition to the function of filtering the foreign matter, the flow rate adjustment ring 145 on the inner side of the upper cover 140 to control the rapid flow rate of direct water ) Is further provided.
- the flow control ring 145 is formed in a cylindrical housing 145a, a ring-shaped expansion and contraction member 145b inserted into the inner surface of the housing 145a, and integrally formed with the housing 145a. It consists of a fixing member (145c) for fixing the (145b).
- the flow control ring 145 serves to adjust the flow rate of the direct water flowing through the outlet 102 into the heat exchanger 8 so as not to exceed the heat exchange capacity of the heat exchanger.
- the flow control ring 145 is deformed into a flat shape by the water pressure to reduce the cross-sectional area of the outlet 102 through which the direct water passes, and when the water pressure of the direct water drops again.
- the original convex shape is restored to widen the cross-sectional area of the outlet 102.
- FIG. 7 is a cross-sectional view showing a state in which the flow sensor is installed in the combustion device.
- the flow sensor 100 having the above structure is installed inside the combustion device 300 such as a boiler or a water heater, and is inserted into and coupled to the inside of the pipe body 320 to form a flow path of direct water and hot water.
- the piping body 320 inside the combustion device 300 refers to an integral injection molding provided in the combustion device housing 310 to form a flow path as shown in FIG. 7.
- the first lower portion 321 is coupled to the connection pipe 331 of the side in which the direct water flows into the lower right portion of the pipe body 320 and the combustion device housing 310 is inclined downward from one side of the first connection portion 321. It is extended so as to be exposed to the outside of the flow sensor 100 includes a second connecting portion 322 is inserted and coupled.
- the upper right side of the second connecting portion 322 of the pipe body 320 is extended so that the mixing valve 200 is inserted into the coupling and the connection pipe of the direct inflow pipe 5 introduced into the heat exchanger (8) side. 332 and a third connection portion 323 coupled to the connection pipe 333 of the hot water supply pipe 9 to which hot water heated from the heat exchanger 8 is supplied.
- connection pipe 334 coupled to the connection pipe 334 through which hot water is discharged extends downward on the left side of the third connection part 323 of the pipe body 320, and the fourth connection part 324.
- the fourth connection part 324 On the upper side opposite to the flow control valve 250 is inserted into the fifth connection portion 325 is coupled is formed.
- the pipe body 320 is in communication with the connection pipe 331 is introduced into the water flow to the right It is downwardly inclined and extended to be exposed to the outside of the combustion device housing 310, the flow sensor 100 is inserted inward through the exposed end of the pipe body 320 and the lower cover 190 is coupled to the lower end.
- the water flowing into the first connection portion 321 through the connection pipe 331 is a pipe body 320
- the flow path in the direction of the downward inclined second connection portion 322 is introduced into the inlet 101 formed in the lower body portion 130, and then through the fluid movement passage inside the upper body portion 120 Will be moved to.
- the direct moving water moving upwards removes foreign substances contained in the direct water while passing through the cone-shaped filter 180.
- Purified water is to continue to move to the upper side of the upper body 120 to rotate the rotary blade 154 of the rotor 150, the rotational speed of the magnet 156 provided on one side of the rotary blade 154 pipe body
- the sensor unit provided at one side of the 320 detects the flow rate of direct water.
- the sensor unit may be configured as a hall sensor 170.
- the flow control valve 250 is described in the combustion device 300, but instead of the flow control valve 250, a flow control ring 145 may be used to control the flow rate of the fluid.
- Direct water passing through the outlet 102 of the upper cover 140 by the flow control ring 145 is discharged after the supply amount is adjusted to a predetermined range is supplied to the heat exchanger (8).
- the flow sensor 100 can be easily coupled and separated from the outside of the combustion device 300, as well as the body 110 and the upper cover 140 are separated from the rotor 150. It is possible to easily clean the foreign matter attached to the rotary blade 154 and the magnet 156 of the inside, by inserting the cone-shaped filter 180 on the fluid movement passage inside the body 110 within the direct water. There is an advantage that can effectively remove the contained foreign matter.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
La présente invention concerne un capteur de débit et un dispositif de combustion en comportant, le capteur de débit étant d'installation et de séparation facile dans et depuis un corps de conduit du dispositif de combustion, permettant ainsi la réalisation aisée d'un travail d'entretien pour les parties internes du capteur de débit et l'accroissement de la capacité d'un filtre équipant un conduit ayant une longueur limitée. Pour atteindre un tel objectif, le capteur de débit selon la présente invention comporte: une unité d'instrument qui se déplace mécaniquement selon l'écoulement d'un fluide ; et une unité de capteur qui détecte le déplacement de l'unité d'instrument, l'unité de capteur étant prévue à l'extérieur du conduit dans le dispositif de combustion, et l'unité d'instrument étant positionnée à l'endroit correspondant à l'unité de capteur dans le conduit du dispositif de combustion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090119438A KR101132006B1 (ko) | 2009-12-03 | 2009-12-03 | 유량센서 및 이를 구비한 연소기기 |
KR10-2009-0119438 | 2009-12-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011068312A2 true WO2011068312A2 (fr) | 2011-06-09 |
WO2011068312A3 WO2011068312A3 (fr) | 2011-09-22 |
Family
ID=44115386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2010/007957 WO2011068312A2 (fr) | 2009-12-03 | 2010-11-11 | Capteur de débit et dispositif de combustion en comportant |
Country Status (2)
Country | Link |
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KR (1) | KR101132006B1 (fr) |
WO (1) | WO2011068312A2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101291691B1 (ko) | 2011-11-25 | 2013-08-07 | 주식회사 하이트롤 | 콘 타입 차압식 유량 측정장치 |
KR101696825B1 (ko) | 2014-09-16 | 2017-01-16 | 주식회사 포스코 | 유량계 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10111993A1 (de) * | 2000-03-13 | 2001-09-20 | Saginomiya Seisakusho Tokyo Kk | Durchflussmengen-Sensor |
KR20070071476A (ko) * | 2005-12-30 | 2007-07-04 | 린나이코리아 주식회사 | 보일러용 직수 복합연결구 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0719915A (ja) * | 1993-06-30 | 1995-01-20 | Rinnai Corp | フローセンサ |
JP2008215867A (ja) | 2007-02-28 | 2008-09-18 | Miura Co Ltd | 羽根車式流量計 |
-
2009
- 2009-12-03 KR KR1020090119438A patent/KR101132006B1/ko active IP Right Grant
-
2010
- 2010-11-11 WO PCT/KR2010/007957 patent/WO2011068312A2/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10111993A1 (de) * | 2000-03-13 | 2001-09-20 | Saginomiya Seisakusho Tokyo Kk | Durchflussmengen-Sensor |
KR20070071476A (ko) * | 2005-12-30 | 2007-07-04 | 린나이코리아 주식회사 | 보일러용 직수 복합연결구 |
Also Published As
Publication number | Publication date |
---|---|
KR101132006B1 (ko) | 2012-03-30 |
KR20110062656A (ko) | 2011-06-10 |
WO2011068312A3 (fr) | 2011-09-22 |
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