A heating device comprises an inner tank, an outer shell, and a heater. The inner tank is received in the outer shell. An inner tank opening and an inner tank inlet are each in communication with an inner tank chamber. An outer shell opening corresponds in position to the inner tank opening. An outer shell inlet and the outer shell opening are each in communication with an outer shell chamber. An outer shell through-hole corresponds in position to an inner tank outlet. One end of an electrical heating tube of the heater is disposed at a fixing portion and electrically connected to a control circuit. The other end of the electrical heating tube is received in the inner tank chamber. The control circuit includes an electric wire for communicating with the outside. A guide channel is formed between the inner tank and the outer shell.

A pressure compensation and mixing device for a fluid heater has a mixing unit and a pressure compensation unit. The mixing unit is configured to mix a fluid guided in the mixing unit. The pressure compensation unit is configured to homogenize the pressure in the fluid. The mixing unit and the pressure compensation unit are integrated in a housing which allows for a compact structure. By the mixing unit, a specific homogenization of the temperature of the water heated by the fluid heater is achieved.

A radiation heater apparatus has a plurality of heat radiation parts and a plurality of heating parts. A low thermal conductive part is formed between adjacent two of the heat radiation parts. The low thermal conductive part is provided with resin material which mainly forms a substrate part. The low thermal conductive part thermally isolates the heat radiation part by surrounding a periphery of the heat radiation part. As a body contacts with the surface of the apparatus, the thermal energy of specific heat radiation part directly under the body dissipates heat to the body. Furthermore, heat transfer from the periphery of the specific heat radiation part to the specific heat radiation part is reduced by the low thermal conductive part.

A point of use induction water heater has a water receiving space arranged between an inlet and outlet, and at least one inductor coil disposed in the water receiving space, arranged to become submerged by water flowing between the inlet and outlet. At least one conductive body is also contained in the water receiving space, and arranged to be inductively heated by the inductor coil upon driving of the coil with a current.

A semi-open high-temperature heat pump system including a compressor, a direct-contact condenser, a heat exchanger, an evaporator, a water purifier, a cold water pump, a hot water pump, a circulating water pump, and a vacuum pump. A discharge port of the compressor is connected to the direct-contact condenser, the direct-contact condenser is connected to the evaporator via the heat exchanger, and the evaporator is connected to a gas suction port of the compressor via a gas vent on its top. An outlet of the water purifier is separately connected to the compressor, the direct-contact condenser, and the evaporator via the cold water pump. An outlet at the bottom of the evaporator is connected to the direct-contact condenser via the circulating water pump. The vacuum pump is connected above the direct-contact condenser, and the hot water pump is connected below the direct-contact condenser.

A tamper-proof fluid sediment trap including a central body portion having a central longitudinal axis, an outlet leg portion, a drip leg portion, and a supply leg portion. The outlet leg portion extends upward from the central body portion parallel to the central longitudinal axis and is configured to operably couple to an appliance. The drip leg portion extends downward from the central body portion and defines a shape being resistant to threading or tapping of an outer surface or an inner surface of the drip leg portion. The supply leg portion is configured to couple to a fluid supply line, extends radially outward from the central body portion, between the outlet leg portion and the drip leg portion, and has a central longitudinal axis extending perpendicular to the central longitudinal axis of the central body portion. The portions of the tamper-proof fluid sediment trap are monolithically formed.

A burner system for gas-fired furnaces that includes a burner box having one or more burner heads. The burner box is linked to one or more heat exchanger tubes. A flame suppression tube extends from each of the one or more burner heads. The flame suppression tube extends in the direction of one of the one or more heat exchanger tubes. A space separates the flame suppression tube from the heat exchanger tube. A blower is configured to provide a mixture of flammable gas and air to the burner box. An air delivery means provides air in the space separating the flame suppression tube from the heat exchanger tube.

A method controls a household appliance being or containing a water heater with regard to limescale deposition. The method includes generating at least one thermal pulse by operation of an electrical heating element of the water heater, and measuring a plurality of successive temperature values. The method further includes determining one or more parameter values of a measurement pattern arising from the plurality of successive temperature values and their respective time of measurement, and ascertaining a limescale deposition state of the water heater based on the determined parameter value. A household appliance contains a computer readable medium having stored thereon instructions configured to trigger, when executed, the household appliance to perform such a method.

The present disclosure discloses a gas mixing device and a gas water heating device. In which, a gas mixing device, comprises: a shell provided with a fuel gas channel for inputting fuel gas, an air channel for inputting air and a gas mixing channel, the fuel gas channel being provided with a first cut-off portion capable of changing a flow area, and the air channel being provided with a second cut-off portion capable of changing a flow area; a moving part movable in the shell, the moving part simultaneously changing the flow areas of the first cut-off portion and the second cut-off portions by moving. The gas mixing device and the gas water heating device can provide a higher regulation ratio, thereby solving the problem that the water temperature is too high in summer.

A water supply system includes a main water tank that is configured to store water and includes a heater to heat the stored water to close to but below a boiling temperature thereof, to provide main heated water. A dispenser water tank receives a portion of the main heated water, and is free of any heating elements to add heat to the water stored therein, and providing dispensable heated water. A water mixer includes a first pipe for receiving the dispensable heated water from the dispenser tank and a second pipe for receiving utility water from a faucet that supplies utility-provided water, with a mixing chamber from which the waters from the first pipe and the second pipe are dispensed and/or in which these waters are admixed.