Abstract: The present invention relates to a warm water recirculating valve using a direct water supply tube and, more particularly, to a warm water recirculating valve provided between a warm water supply tube (13) installed in an existing housing and a direct water supply tube (14) in order to recirculate warm water, the warm water recirculating valve comprising: a housing (110) having warm water channels (111, 112) formed therein and connected to the warm water supply tube (13), having direct water channels (114, 115, 116) formed therein and connected to the direct water supply tube (14), and having a recirculating channel (113) formed therein and connected between the warm water channels (111, 112) and the direct water channels (114, 115, 116); and a water pressure plate (140) provided in the direct water channels (114, 115, 116) so as to generate a differential pressure such that, when warm water is recirculated, the recirculating channel (113) is opened by pressure of the recirculated warm water and, when direct

Abstract: The present disclosure is directed to provide an air conditioner using an evaporative cooler to cool a condenser and improve cooling efficiency, and configured to supply air, which passes through a dry channel of the evaporative cooler, to a humid channel to improve efficiency of the evaporative cooler.

Abstract: Provided are an air conditioner capable of indoor cooling and humidity control with a simple structure. The air conditioner comprises: a first air flow channel; a second air flow channel; a dehumidifying rotor which comprises a first region provided on the first air flow channel, a second region provided on the second air flow channel, and an adsorbent which alternately passes through the first region and the second region and adsorbs moisture in the first region or the second region; a cooling unit configured to cool air from which moisture is removed while passing through the first region; and a control unit configured to control the dehumidifying rotor and the cooling unit such that air flowing in the first air flow path is dehumidified and cooled and a temperature or humidity of the indoor area is detected to be adjusted to a set value.

Abstract: The present invention relates to a heat exchanger enabling the reduction of the number of components constituting the heat exchanger, the simplification of the coupling structure thereof, and also, the decrease of combustion gas flow resistance and the minimization of noise and vibration generation, the heat exchanger being provided with a heat exchange unit having heating medium flow channels through which a heating medium flows and combustion gas flow channels through which combustion gas combusted in the burner flows to be alternately formed and adjacent to each other in spaces between a plurality of plates, wherein the heat exchange unit comprises: a sensible heat unit which surrounds the outer side of a combustion chamber, is formed of one side area of the plates, and heats the heating medium by using sensible heat of combustion gas generated by the combustion of the burner; and a latent heat unit which is formed of the other side area of the plates, and heats the heating medium by using latent heat of w

Abstract: A shell-and-tube heat exchanger according to the present invention comprises: an outer barrel having a cavity provided therein such that heating water flows along the same; a lower tube plate that covers an opening near one end of the outer barrel; an upper tube plate that covers an opening near the other end of the outer barrel, the upper tube plate providing an inner space in which a heat source is positioned; a plurality of flues for guiding combustion gas from the upper tube plate to the outside of the lower tube plate; and a main diaphragm arranged across a reference direction between the lower tube plate and the upper tube plate, a plurality of through-holes being formed in the main diaphragm such that the flues penetrate the same, wherein at least some of the through-holes constitute a large-width through-hole (single hole) that at least two of the flues penetrate together.

Abstract: A scale-free boiler of the present disclosure includes a boiler case, a main flow path disposed inside the boiler case and in communication with a heating flow path disposed outside the boiler case to provide heating, a heat source for heating water flowing along the main flow path, and a filter for removing, based on an electrical force, an ionic material contained in the water flowing along the main flow path or water to be supplied to the main flow path to prevent occurrence of scale.

Abstract: Provided are an air conditioner capable of indoor ventilation and humidity control with a simple structure and a method of controlling the same. The air conditioner comprises: a first air flow channel; a second air flow channel; a dehumidification rotor which comprises a first region provided on the first air flow channel, a second region provided on the second air flow channel, and an adsorbent which alternately passes through the first region and the second region and adsorbs moisture in the first region or the second region; and a control unit which controls so that, when in a ventilation mode, indoor air introduced through the first air flow channel is discharged to the outdoors through the second air flow channel and the second region, and air introduced from the outdoors is introduced to the indoors through the first air flow channel and the first region.

Abstract: A water-softening system includes a filter device including filter units that are provided in at least some of a plurality of supply channels arranged in parallel to supply raw water to a consumption site and that remove at least part of ionic matter contained in supplied raw water by electro-deionization and discharge soft water containing less ionic matter than the raw water, a plurality of supply valves provided in the plurality of supply channels to open or close the supply channels, and a processor connected to the filter device and the plurality of supply valves. The processor determines whether water is supplied to the consumption site and controls at least one of the plurality of supply valves to remain open to maintain a state in which water is allowed to be supplied to the consumption site, when it is determined that no water is supplied to the consumption site.

Abstract: A flame hole unit structure of a combustion apparatus provided with a plurality of flame holes for forming a flame comprises: a lean flame hole unit including, as a flame hole for jetting lean gas, at least one lean flame hole extending along the longitudinal direction which is a direction perpendicular to the jetting direction of the lean gas; and a rich flame hole unit including, as a flame hole for jetting rich gas, a pair of rich flame hole provided on both sides of the lean flame hole unit with respect to a width direction which is a direction perpendicular to the jetting direction and the longitudinal direction and extending along a direction parallel to the longitudinal direction.

Abstract: The present invention relates to a heat exchanger enhancing heat exchange efficiency between a heating medium and combustion heat of a burner, the heat exchanger being provided with a heat exchange unit having heating medium flow channels through which a heating medium flows and combustion gas flow channels through which combustion gas combusted in the burner flows to be alternately formed and adjacent to each other in spaces between a plurality of plates, wherein the heat exchange unit comprises: a sensible heat unit which surrounds the outer side of a combustion chamber, is formed of one side area of the plates, and heats the heating medium by using sensible heat of combustion gas generated by the combustion of the burner; and a latent heat unit which is formed of the other side area of the plates, and heats the heating medium by using latent heat of water vapor included in combustion gas that has finished undergoing heat exchange in the sensible heat unit, wherein the heating medium flow channels of the se

Abstract: The present invention relates to a boiler which determines a clogging degree of an exhaust flue through which combustion gas is discharged and adjusts gas supply amount to maintain its combustibility, and a combustion control method thereof, the method of the present invention including a) setting a target heat value for achieving a target temperature, b) applying a first database on the basis of the target heat value, c) measuring a rotational speed of an air blower and a pneumatic pressure of air introduced by rotation of the air blow, d) applying a second database on the basis of a rotational speed difference, a pneumatic pressure difference, and the target heat value to calculate an estimated flue clogging value according to the target heat value, and a) applying a third database according to the estimated flue clogging value to calculate an opening amount of a gas valve and control gas supply amount.

Abstract: A heat transfer fin includes a fin body having a plate shape, a plurality of through-holes famed through the fin body and spaced apart from each other in a first direction, in which a heat exchange pipe is inserted into the plurality of through-holes and heating water flows along an empty space in the heat exchange pipe, and two outer body portions protruding outward from at least partial areas of opposite ends of the fin body with respect to the first direction. Each of the outer body portions includes a contact portion that makes contact with a heat-insulating pipe with a heat-insulating side plate therebetween and that has a shape corresponding to at least a partial area of an outer surface of the heat-insulating pipe through which the heating water flows and a separated portion spaced apart from the heat-insulating side plate to form a gap.

Abstract: A heat exchanger according to the present invention comprises a heat exchange portion in which heating medium flow paths, where a heating medium flows through a space between a plurality of plates, and combustion gas flow paths through which a combustion gas combusted in a burner flows are adjacently and alternatingly formed, wherein the heat exchange portion comprises a sensible heat portion, which surrounds the outside of a combustion chamber and comprises an area on one side of the plates, for heating the heating medium using the sensible heat of the combustion gas generated by combustion of the burner, and a latent heat portion, which comprises an area on the other side of the plates, for heating the heating medium using the latent heat of water vapors in the combustion gas which has completed heat exchanging in the sensible heat portion, wherein a connection passage for the heating medium is formed between the sensible heat portion and the latent heat portion, the plates are formed in a vertical structur

Abstract: The objective of the present invention is to provide a boiler system for bath heating and hot water that is capable of performing heating and hot water preheating by using a single circulation pump for both without the need to separately include a circulation pump for heating and a circulation pump for hot water preheating.

Abstract: Provided is a method for measuring the temperature at each location of a pipe in a hot water supply system comprising a water heater, a pipe, and outlets, the method comprising checking for a temperature of a first point (TP1), which is upstream of the outlet, a temperature of a second point (TP2), which is downstream of the outlet and an outdoor temperature (TA), and confirming a length (L) of the pipe from the first point to the second point, then measuring a temperature of the pipe located at a distance of x away from the first point.

Abstract: A hot water supply system according to the present invention includes: a hot water supply unit configured to supply hot water; an opening and closing valve configured to connect a hot water supply pipe, which is configured to supply hot water to a user from the hot water supply unit, and a cold water supply pipe, which is configured to supply cold water introduced from a cold water inflow pipe to the user, to allow water to flow or configured to disconnect the hot water supply pipe from the cold water supply pipe to block the water from flowing; a circulation pump configured to circulate water supplied from the hot water supply unit through the hot water supply pipe, the opening and closing valve, the cold water supply pipe, and the hot water supply unit; and a control unit configured to, when a water-preheating signal of the user is input, open the opening and closing valve, and operate the circulation pump to preheat water which is to be supplied to the user.

Abstract: The present invention relates to a heat exchanger having a simplified assembly structure as well as a simplified structure for heat-insulating a combustion chamber, the heat exchanger being provided with a heat exchange unit having heating medium flow channels through which a heating medium flows and combustion gas flow channels through which combustion gas combusted in the burner flows to be alternately formed and adjacent to each other in spaces between a plurality of plates, wherein the heat exchange unit comprises: a sensible heat unit which surrounds the outer side of a combustion chamber, is formed of one side area of the plates, and heats the heating medium by using sensible heat of combustion gas generated by the combustion of the burner; and a latent heat unit which is formed of the other side area of the plates, and heats the heating medium by using latent heat of water vapor included in combustion gas that has finished undergoing heat exchange in the sensible heat unit, wherein the rear of the sens

Abstract: A recirculation valve includes a housing including a hot water fluid passage which is used to allow the hot water to flow through, a cold water fluid passage to allow the cold water to flow through, and a recirculation fluid passage to allow the hot water in the hot water fluid passage to flow into the cold water fluid passage, a water pressure plate provided to close the recirculation fluid passage when the cold water or the hot water is used, and to open the recirculation fluid passage when the cold and hot waters are not used, and a bimetal plate configured to open the recirculation fluid passage as the bimetal plate is spaced apart from a recirculation opening and to close the recirculation fluid passage by making contact with the recirculation opening, and positioned downstream of the recirculation opening in a direction in which the hot water flows.