Abstract: The present disclosure relates to a removable filter system for removably coupling a filter unit to an air supply unit provided in a boiler. The filter unit is detachably coupled to the air supply unit, so that after removing the contaminated filter unit coupled to the air supply unit, a new filter unit can be coupled to the air supply unit or the existing filter unit can be reused after removing contaminants remaining in the filter.

Abstract: The present disclosure relates to a removable filter system for removably coupling a filter unit to an air supply unit provided in a boiler. The filter unit is detachably coupled to the air supply unit, so that after removing the contaminated filter unit coupled to the air supply unit, a new filter unit can be coupled to the air supply unit or the existing filter unit can be reused after removing contaminants remaining in the filter.

Abstract: The present disclosure relates to a gas mixing apparatus for a boiler, and the gas mixing apparatus includes a housing provided in the form of a hollow pipe opened at upper and lower sides thereof and having a first gas inlet port through which fuel gas is introduced from the outside, and a mixing pipe including a pipe body provided in the housing and configured to allow air to flow therein, the mixing pipe having a second gas inlet port provided at a lateral side of the mixing pipe and configured to allow the fuel gas to be introduced therethrough, and fluid guides provided at an outer side of the pipe body and configured to guide a flow of the fuel gas from the first gas inlet port to the second gas inlet port.

Abstract: The present disclosure relates to a removable filter system for removably coupling a filter unit to an air supply unit provided in a boiler. The filter unit is detachably coupled to the air supply unit, so that after removing the contaminated filter unit coupled to the air supply unit, a new filter unit can be coupled to the air supply unit or the existing filter unit can be reused after removing contaminants remaining in the filter.

Abstract: A heat exchanger for heating a fluid flowing through a pipe using a combustion gas includes: a body including open upper and lower ends and having a space formed therein to allow the combustion gas to pass therethrough; a combustor formed in an upper portion of the space in which combustion of the combustion gas occurs; a heat exchange portion formed below the combustor and provided with a heat exchange pipe configured to heat an internal fluid by using the combustion gas; and a heat return pipe provided outside the space so as to be in contact with an outer surface of the body, wherein the combustor and the heat exchange portion may be unitarily formed, and the body in which the combustor is formed includes a concave portion protruding concavely inward so as to correspond to a shape of an outer circumferential surface of the heat return pipe.

Abstract: A heat exchanger for heating a fluid flowing through a pipe using a combustion gas includes: a body including open upper and lower ends and having a space formed therein to allow the combustion gas to pass therethrough; a combustor formed in an upper portion of the space in which combustion of the combustion gas occurs; a heat exchange portion formed below the combustor and provided with a heat exchange pipe configured to heat an internal fluid by using the combustion gas; and a heat return pipe provided outside the space so as to be in contact with an outer surface of the body, wherein the combustor and the heat exchange portion may be unitarily formed, and the body in which the combustor is formed includes a concave portion protruding concavely inward so as to correspond to a shape of an outer circumferential surface of the heat return pipe.

Abstract: Disclosed are a pictogram recognition apparatus, a pictogram recognition system, and a pictogram recognition method, wherein the pictogram recognition method includes acquiring learning data, acquiring an image including a pictogram, extracting at least one zone from the image, acquiring a descriptor corresponding to the at least one zone, recognizing a pictogram by comparing the descriptor with the learning data and providing a user with information corresponding to the recognized pictogram.

Abstract: Disclosed are a pictogram recognition apparatus, a pictogram recognition system, and a pictogram recognition method, wherein the pictogram recognition method includes acquiring learning data, acquiring an image including a pictogram, extracting at least one zone from the image, acquiring a descriptor corresponding to the at least one zone, recognizing a pictogram by comparing the descriptor with the learning data and providing a user with information corresponding to the recognized pictogram.

Abstract: The present invention relates to a trap apparatus for condensate water and the drain apparatus for condensate water installed on the same. In particular, the present invention relates to a trap apparatus for condensate water, constructed such that acidic condensate water is passed through a neutralizing agent and trapped in the apparatus, and the drain apparatus for condensate water installed on it.

Abstract: A condensing type hot water boiler comprises: a firebox casing that formulates a firebox in which fuel is combusted; a burner that ignites fuel furnished in the upper part of said firebox casing; a ventilator that supplies air to said firebox; a heat exchange casing, wherein heat is exchanged between hot water and the flame and combustion gas flowing in from said firebox, located at the lower part of said firebox casing; and a hot water coil formed to cover the inner wall of said firebox casing and in which hot water is received in the interior from said heat exchange casing for heat exchange with flame and combustion gas of the interior of said firebox.

Abstract: The present invention relates to a trap apparatus for condensate water and the drain apparatus for condensate water installed on the same. In particular, the present invention relates to a trap apparatus for condensate water, constructed such that acidic condensate water is passed through a neutralizing agent and trapped in the apparatus, and the drain apparatus for condensate water installed on it.

Abstract: The present device relates to a combustion boiler having a fan part provided with a driving motor, a suction fan secured on a rotary shaft of the driving motor and disposed on a suction line, for forcedly sucking air in the room or from the outside, and an exhaust fan secured on the rotary shaft of the driving motor and disposed on an exhaust line, for forcedly exhausting an exhaust gas to the outside. Hence, the air in the room or from the outside is forcedly sucked to the suction line by means of the suction fan and the exhaust gas is forcedly exhausted to the exhaust line by means of the exhaust fan. In this way, the flowing of air is constantly kept in all of the suction, combustion and exhaust lines.