| KYUNGDONG NETWORK CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20100270385 | METHOD FOR CONTROLLING HEATING SYSTEM - A method for controlling a heating system for organically controlling heating of respective rooms to uniformly heat the respective rooms by proportionally calculating heat supplies required by the respective rooms from temperature of returned water, even when the heat supplies required by the respective rooms are different from each other, depending on external conditions of the respective rooms. The method adjusts flow rates of heating water supplied to the respective rooms by adjusting opening rates of room valves installed in heating water pipes. The temperature of the returned heating water is measured, a ratio of opening rates of the respective room valves is calculated from the measured temperature of the returned water to proportionally supply heat to the respective rooms, and the opening rates of the respective room valves are adjusted, depending on the calculated ratio of the opening rates. | 10-28-2010 |
| 20100258194 | METHOD FOR CONTROLLING HEATING SYSTEM - A method for controlling a heating system for uniformly heating respective rooms by proportionally calculating heat supplies required by the respective rooms, even when the heat supplies required for heating the respective rooms are different from each other, depending on indoor temperature conditions and external conditions of the respective rooms. The method adjusts flow rates of heating water supplied to the respective rooms by adjusting opening rates of room valves installed in heating water pipes. Current temperature differences between temperatures set for the respective rooms and indoor temperatures measured in the respective rooms are calculated, and opening rates of other room valves of other rooms, excluding rooms having a current temperature difference larger than a previously set temperature difference, are reduced. | 10-14-2010 |
| 20100255434 | SYSTEM AND CONTROL METHOD FOR DETECTING AN ABNORMAL BURNING SITUATION USING AIR PRESSURE SENSING AND FLAME DETECTION - Disclosed is a method for detecting a combustion state of a boiler, and more particularly to a boiler and a method capable of exactly detecting an abnormal combustion state of a gas boiler using an air pressure sensor and a flame detection unit, thereby improving efficiency of the boiler. The method comprises the steps of (S1) supplying air to a burner through a fan, (S2) detecting whether an optimum amount of air is supplied through step (S1) by using the air pressure sensor, (S3) continuously detecting a status of a flame through the flame detection unit if the flame is made by an ignition part, (S4) converting a size of the flame into a corresponding voltage value, inputting the voltage value into a microcomputer, and comparing the voltage value with a preset target voltage value, (S5) stopping a combustion process if the microcomputer determines that the air pressure sensor erroneously operates based on a fact that a difference value between the voltage value and the preset target voltage value exceeds a reference value, and (S6) displaying an error message indicating an abnormal combustion state if the microcomputer determines that the air pressure sensor erroneously operates. | 10-07-2010 |
| 20090243775 | MAGNETIC HAVING LINEAR MAGNETIC FLUX DENSITY - The present invention relates to a magnet having a linear magnetic flux density, which causes the magnetic flux density thereof to vary linearly and, more particularly, to a magnet having a linear magnetic flux density, in which the shape and magnetization pattern of the magnet are changed so that displacement in proportion to linearly varying displacement from the magnet is more accurately measured using a magnetic flux sensor, thus causing the magnetic flux density to vary linearly (or rectilinearly) according to the displacement. The present invention is configured to have a rectangular shape or a trapezoid shape so that displacement in proportion to linearly varying displacement from the magnet is more accurately measured using a magnetic flux sensor, and is configured such that the value of magnetic flux density varies linearly (rectilinearly) according to the magnetization pattern of the rectangular shape or a trapezoid shape. | 10-01-2009 |
| 20090120382 | Method for Maximum Efficiency of Non-Condensing Boiler - Provided is a method for operating a non-condensing boiler at maximum non-condensation efficiency, and more particularly a method for operating a non-condensing boiler, capable of supplying an appropriate amount of excess air for combustion of a burner, avoiding damaging a heat exchanger due to the condensed water generated at the heat exchanger, and effectively improving the heat efficiency. The method comprises the steps of: sensing a temperature of exchange water introduced into a heat exchanger and a temperature of supply water discharged from the heat exchanger and calculating an average temperature from the two temperatures to obtain a maximum concentration of CO using information stored in a controller; calculating a ratio of excess air (λ) from the maximum concentration of CO using a combustion equation chosen depending on a fuel used; checking from a combustion characteristic curve whether or not the excess air ratio (λ) is within a stable combustion region; when the excess air ratio (λ) is within the stable combustion region, setting this excess air ratio to the control target value, and when the excess air ratio (λ) is less than a lower limit of the stable combustion region, setting a minimum excess air ratio of the stable combustion region to the control target value; calculating a target value of air flow suitable for the current consumption amount of fuel based on the set excess air ratio; and performing feedback control with respect to the air flow target value and a value input from an air flow sensor. With this configuration, no condensation takes place during operation of the non-condensing boiler, so that the boiler can have increased durability, be easily assembled at inexpensive production costs, be made compact, and obtain maximum heat efficiency under a non-condensation condition. | 05-14-2009 |
| 20090020717 | WATER FLOW CONTROL VALVE - The present invention provides a water flow control valve, which has an improved structure, thus reducing manufacturing costs and increasing the reliability of products. To achieve the above-mentioned purpose, the water flow control valve includes synchronous motors ( | 01-22-2009 |
