Patent application number | Description | Published |
20080276884 | Hot-Water Supply System Having Supplementary Heat Exchanger - Disclosed is a hot water supplying apparatus having an auxiliary heat exchanger. The hot water supplying apparatus comprises: a heat exchanger including an inlet pipe for introducing heating water into the heat exchanger, and first, second, and third heat exchanging pipes connected to the inlet pipe and sequentially arranged; and an auxiliary heat exchanging device installed at an inlet port of the heat exchanger through which the heating water is introduced, the auxiliary heat exchanging device including a first auxiliary heat exchanging pipe connecting the inlet pipe to the first heat exchanging pipe, a second auxiliary heat exchanging pipe connecting the second heat exchanging pipe to the third heat exchanging pipe, and heat transfer fins for transferring heat energy from the second auxiliary heat exchanging pipe to the first auxiliary heat exchanging pipe. | 11-13-2008 |
20080277097 | Hot-Water Supply System Having Dual Pipe - Disclosed is a hot water supplying apparatus which has a dual pipe capable of transferring heat energy of hot water, which is heated by heat of combustion of a burner and flows in pipe of a heat exchanger, to an inner pipe in which cold water is introduced, thereby inhibiting the condensation of moisture so as to prevent the corrosion of parts in the hot water supplying apparatus. The hot water supplying apparatus, comprises: a burner for supplying heat; a water inlet pipe for supplying cold water; a heat exchanging pipe formed with a dual pipe including an outer pipe for directly receiving combustion heat of the burner, and an inner pipe formed in the outer pipe, for allowing the cold water, which is introduced through the water inlet pipe, to be heated while passing through the inner pipe; and a water outlet pipe for discharging the heated water from the heat exchanging pipe. | 11-13-2008 |
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 |
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 |
20090120623 | Dual Pipe Heat Exchanger of Instantaneous Boiler for House Heating and Hot Water and Boiler - Disclosed are an instantaneous boiler and a double pipe heat exchanger for the instantaneous boiler supplying heating water and hot water, which can obtain hot water output larger than heating water output, simultaneously use the heating water and the hot water, and have a simple piping structure. The heat exchanger includes: an outer pipe used for a hot water pathway, to which combustion heat is directly transferred from a burner in a combustion chamber; and an inner pipe used for a heating water pathway and extending through the outer pipe. The boiler includes: a heat exchanger including an outer pipe used for hot water pathway, to which combustion heat is directly transferred from a burner in a combustion chamber, and an inner pipe used for heating water pathway, which extends through the outer pipe; a heating water supply pipe connected to the inner pipe of the heat exchanger; a heating water line connected to the heating water supply pipe; and a heating water returning pipe connected to the inner pipe, wherein the inner pipe of the heat exchanger, the heating water supply pipe, the heating water line, and the heating water returning pipe are connected to one another in series. | 05-14-2009 |
20090133641 | Device for Preventing Initial Hot Water Supplying in Concentric Tube Type Heat Exchanger and Its Control Method - Disclosed are a device for preventing initial hot water from being discharged from a double pipe heat exchanger and a method of controlling the same, which can temporarily mix cold water with hot water so as to decrease the temperature of the discharged hot water when the high temperature water is initially discharged from the double pipe heat exchanger. The device for preventing initial hot water from being discharged from a double pipe heat exchanger which includes a cold water pipe into which a cold water is introduced, a hot water heat exchanging pipe for absorbing combustion heat of a burner so as to heat the cold water to hot water and to discharge the hot water, a hot water pipe for supplying high temperature hot water discharged from the hot water heat exchanging pipe, and a heating water heat exchanging pipe having both ends connected to a heating water returning inlet and a heating water discharging outlet and disposed in the hot water heat exchanging pipe, includes: a bypass pipe extending between a cold water pipe and a hot water pipe, for directly supplying cold water in the cold water pipe to the hot water pipe; a mixing valve mounted on one end of the bypass pipe; a heating water temperature sensor mounted on the heat water discharging outlet, for detecting the heating water temperature; a hot water temperature sensor mounted on the hot water supplying pipe, for detecting a hot water temperature; and a controller for receiving temperature values detected by the heating water temperature sensor and the hot water temperature sensor so as to control a degree of opening of the mixing valve. | 05-28-2009 |
20090283249 | Dual Pipe Heat Exchanger of Boiler for House Heating and Hot Water - Disclosed is a double pipe heat exchanger for a boiler supplying heating water and hot water, which can prevent water from being condensed even if cold heating water or cold water is introduced into an inlet of the heat exchanger in the boiler for supplying heating water and hot water The heat exchanger includes: a plurality of outer heating water pipes to which combustion heat is applied from a burner of a combustion chamber; a plurality of inner pipes, each of which is inserted in each outer pipe; a returned heating water pipe in which cold heating water is introduced; and a cold water pipe in which cold water is introduced, wherein the returned heating water pipe and the cold water pipe are connected to one of the inner pipes. The heat exchanger has a structure in that returned cold heating water or cold water is firstly introduced into the inner pipe of an heat exchanger, sufficiently preheated, and introduced into the outer pipe of the heat exchanger again, thereby preventing water from being condensed around an inlet of the heat exchanger through which returned cold heating water or cold water is introduced. | 11-19-2009 |
20100307727 | HEAT EXCHANGER AND MANUFACTURING METHOD OF HEAT EXCHANGING PIPE COMPOSING IT - The present invention relates to a heat exchanger and a manufacturing method of a heat exchanging pipe composing it that are capable of preventing the flow of exhaust gas from being obstructed because the heat exchanging pipe is expanded and a space between the heat exchanging pipes is narrowed due to a water pressure of heating water flowing in the inside of the heat exchanging pipe. In order to implement this, according to the present invention, in a heat exchanger with a heat exchanging pipe where heating water flows therein and that has a rectangular cross section in which a width of a side being in contact with combustion gas is larger than a height, the heat exchanging pipe has a shape for offsetting deformation by previously considering deformation of the heat exchanging pipe generated by water pressure of the heating water flowing therein. According to the present invention, when the water pressure of the heating water is applied to the inside of the heat exchanging pipe, a cross section of the heat exchanging pipe is deformed to a shape ideal for exchanging heat, whereby the combustion gas can smoothly pass a space between the heat exchanging pipes. | 12-09-2010 |
20110017428 | PLANE TYPE HEAT EXCHANGER - The present invention relates to a plane type heat exchanger that has a simple structure and can be easily manufactured by substituting a rectangular plane type for a spiral cylindrical type of the structure of a heat exchange pipe according to the related art which is used for a heat exchanger using combustion gas that is heated by a burner and makes laminar flow. According to the present invention, the plane type heat exchanger having heat exchange pipes, through which heating water flows, and makes heat exchange by contacting with laminar-flow combustion gas, the plane type heat exchanger, includes: a plurality of heat exchange pipes that have a rectangular cross section with a larger width of a side, which contacts with the combustion gas, than the height, and are arranged at regular intervals in parallel with each other; inner plates where both ends of the heat exchange pipes are inserted to be fixed at regular intervals; and outer plates that are communicated with the heat exchange pipes through the inner plates and form spaces covering the outer surfaces of the inner plates. | 01-27-2011 |