Abstract: The present disclosure provides a device for preventing breakage of a diaphragm for a normal-open solenoid valve, the device including a pressure transmission prevention means installed in an inlet region of a square hole and configured to prevent pressure, which is generated by a fluid, from being transmitted to a diaphragm in order to prevent the diaphragm from being broken by pressure applied to the diaphragm by the fluid introduced through the center hole and passing through the square hole.

Abstract: Disclosed is a water softening system includes a first and a second filter unit that selectively performs any one of a removable mode discharging soft water including less ionic material than a source water, and a recycling mode of discharging reclaimed water including more ionic material than the source water, a first and a second supply passage that supplies the source water to the first and the second filter unit, a first and a second discharge passage that discharges the soft water or the reclaimed water from the first and the second filter unit, a first recovery passage part that guides at least a portion of the reclaimed water in the first discharge passage to the second supply passage, and a second recovery passage part that guides at least a portion of the reclaimed water in the second discharge passage to the first supply passage.

Abstract: Disclosed is a valve including a valve housing having an empty space therein, an opening/closing part provided in the valve housing and configured to be movable in an upward/downward direction H, a shaft part fixedly coupled to the opening/closing part and configured to be movable in the upward/downward direction H together with the opening/closing part, a drive part configured to move the shaft part in the upward/downward direction H, and a seating part protruding inward from an inner surface of the valve housing and configured to interfere with the opening/closing part when the opening/closing part moves in the upward/downward direction H by a predetermined distance.

Abstract: Disclosed is a fuel mixing apparatus including a case defining a passage, in which air and a fuel flow, an opening/closing device that opens and closes the passage as at least a portion thereof is rotated, and a rotation guide that supports the opening/closing device to prevent a rotation axis of the opening/closing device from being inclined while the opening/closing device is rotated.

Abstract: A heat exchanger unit according to the present invention includes a sensible heat exchanger including a sensible heat exchange pipe disposed in a sensible heat exchange area for heating water used for heating by receiving sensible heat generated by a combustion reaction, wherein the sensible heat exchange pipe receives the water used for heating and flows same through the interior, and a sensible heat fin disposed in the sensible heat exchange area. The sensible heat fin is formed in a plate shape across the sensible heat exchange pipe and penetrated by the sensible heat exchange pipe; and a latent heat exchanger positioned downstream from the sensible heat exchange area on the basis of a reference direction, which is a flow direction of combustion gas generated during the combustion reaction, the latent heat exchanger including a latent heat exchange pipe disposed in a latent heat exchange area.

Abstract: A hot water supply system according to the present invention comprises a boiler which heats water supplied from a direct water pipe to provide same to a hot water pipe and a hot water circulation valve which connects or separates the hot water pipe to or from the direct water pipe on the basis of a valve operation temperature, wherein a preheating time may be learned on the basis of a flow rate of water circulated through the hot water pipe, the hot water circulation valve, the direct water pipe, and the boiler when a preheating operation is performed, and a malfunction of the hot water circulation valve can be determined through flow rate detection without a separate device.

Abstract: A heat-exchanger unit according to the present invention comprises: a sensible-heat heat-exchange portion arranged in a sensible-heat heat-exchange area for receiving sensible heat generated by a combustion reaction and thereby heating water, the sensible-heat heat-exchange portion having a sensible-heat heat-exchange pipe for receiving the water and causing same to flow through the interior thereof, thereby forming a sensible-heat channel along which the water flows; and a latent-heat heat-exchange portion positioned downstream of the sensible-heat heat-exchange area with reference to a first reference direction along which combustion gas generated during the combustion reaction flows, the latent-heat heat-exchange portion being arranged in a latent-heat heat-exchange area for receiving latent heat generated during a phase change of the combustion gas and thereby heating the water, the latent-heat heat-exchange portion having a latent-heat heat-exchange pipe for receiving the water and causing same to flow t

Abstract: A water heater according to the present invention comprises: a combustion chamber; a burner provided to cause a combustion reaction in the combustion chamber; a plurality of circulation pipes that communicate with the combustion chamber so that combustion gas generated by the combustion reaction flows through the inside; a circulation housing that surrounds the plurality of circulation tubes and the combustion chamber so that circulating water flows to the surroundings of the plurality of circulation tubes and the combustion chamber; a pre-stage heat exchanger that communicates with the plurality of circulation tubes to exchange heat between direct water and combustion gas passing through the plurality of circulation tubes to generate pre-stage hot water; and a main heat exchanger that is connected to the pre-stage heat exchanger and the circulation housing, to generate hot water by exchanging heat between the hot water received from the pre-stage heat exchanger and the hot water delivered from the circulatio

Abstract: The present disclosure provides that the air conditioning system includes a compressor, a condenser, an expansion valve, and an evaporator through which a refrigerant circulates; an indoor unit in which the evaporator is disposed; an outdoor unit; and a dehumidification unit connected to the indoor unit, in which the dehumidification unit includes a regeneration channel including a first outdoor air inlet and an outdoor outlet, a dehumidification channel including an indoor air inlet or a second outdoor air inlet and an indoor supply, a dehumidification rotor disposed between the regeneration channel and the dehumidification channel, and a heat exchange unit disposed between the dehumidification rotor and the first outdoor air inlet in the regeneration channel to heat passing air, and the indoor unit is configured such that the air supplied from the indoor supply unit passes through the evaporator and then is supplied to a room.

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: A heating system according to an embodiment of the present disclosure includes a water heating apparatus that supplies heating water for indoor heating, a hot water heating apparatus that heats hot water using the heating water, and a controller that controls a heating operation by controlling a flow rate of at least one of the heating water supply flow path and the hot water heating flow path according to an operation mode, wherein, when operating in a heating and hot water mode, the controller opens both the heating water supply flow path and the hot water heating flow path to control both indoor heating and hot water heating to be performed and adjusts flow rates at which the water is supplied to the heating water supply flow path and the hot water heating flow path according to control priority of an indoor heating operation and a hot water heating operation.

Abstract: Disclosed is an air heating apparatus including a burner configured to cause a combustion reaction, a main passage, through which water flows while circulating, a heat exchanging device configured to receive heat from combustion gas generated by the combustion reaction and heat the water flowing along the main passage, a heating heat exchanger configured to receive the water heated by the heat exchanging device and exchange heat with the air for heating, a fan configured to send the air to the heating heat exchanger, and a hot water discharge port connected to the main passage such that the water heated by the heat exchanging device is discharged to an outside of the main passage.

Abstract: A water heater according to the present invention includes: a heating unit that includes a burner provided to cause a combustion reaction from air and fuel, and that is provided to generate heated water by using heat generated by the combustion reaction; and a humidifier unit that generates water steam by evaporating water using a combustion gas generated by the combustion reaction and discharged from the heating unit, and provides the water steam together with the air to the burner.

Abstract: A pipe according to the present disclosure includes a body portion provided with a seating section having a straight profile extending in a first direction and extending in a second direction that is one direction perpendicular to the first direction when cut along a plane perpendicular to the first direction, wherein the body portion passes in the first direction to define a hollow.

Abstract: The present invention relates to a heat exchanger comprising: a tube having a flow space formed therein through which a heating medium flows; and a plurality of heat exchange fins coupled to the outer surface of the tube and spaced apart from each other along the extension direction of the tube, wherein heat exchange fins adjacent to each other, from among the plurality of heat exchange fins, are formed in different shapes when viewed in the extension direction of the tube.

Abstract: The purpose of the present invention is to provide a hot water supplying apparatus that enables a user to conveniently execute a hot water control function in a location where a faucet is located, and a method for controlling the same. The hot water supplying apparatus for achieving said purpose comprises: a flow rate detection unit for detecting a flow rate change of water supplied by turning a faucet on/off and outputting a flow rate signal; and a control unit for, when the flow rate detection unit detects a flow rate change in a specific pattern, controlling a preset hot water control function to be executed according to the flow rate change pattern.

Abstract: A hot water supply apparatus according to an embodiment of the present disclosure includes a first heat exchanger that heats heating water and a second heat exchanger that generates hot water, a first temperature sensor that is installed on a first flow path through which the supply water supplied by the first heat exchanger flows to the second heat exchanger and measures a temperature of the supply water, a second temperature sensor that is installed on a second flow path through which return water of the supply water cooled after heat exchange with the second heat exchanger flows to the first heat exchanger and measures a temperature of the return water, and a controller that predicts the temperature of the supply water based on the temperature of the return water measured by the second temperature sensor and preforms hot water control based on the predicted temperature of the supply water.

Abstract: A condensate trap apparatus according to the present invention comprises: an inlet hole for inflowing a condensate; a storage space for storing the condensate introduced from the inlet hole; an outlet unit including a discharge hole for discharging the stored condensate from the storage space; and a buoyant body including a closing portion which is convex vertically downward so as to close the discharge hole by being seated on the outlet unit, and a support of a pillar type extending vertically upward from the closing portion.