According to one embodiment, water storage tank has a space in an interior of the water storage tank. Water is stored in the space. The tank includes a lower enclosure, an upper enclosure, and a bonding member. The upper enclosure is positioned on the lower enclosure. The space is formed by the upper enclosure being bonded to the lower enclosure. The upper enclosure is longer than the lower enclosure in a vertical direction. The bonding member bonds the lower enclosure and the upper enclosure and is positioned between the lower enclosure and the upper enclosure. The lower enclosure has a concave part provided on the space side of the bonding member. The upper enclosure has a convex part provided on the space side of the bonding member. The convex part is engaged with the concave part.

A system and a method for preventing bacteria growth and proliferation, and particularly the Legionella bacteria, in a water tank of an electric water heater is described. A small pump is mounted on the water heater and has a power rating greater than the domestic water supply. The pump is controlled by a controller to pump hot water from the upper region of the tank to the lower region of the tank. The pump is connected between the hot water outlet of the tank and the cold water inlet to which an elongated dip tube is secured and with its discharge end positioned in close proximity to the bottom wall of the tank. The controller has a timer and is programmed to pump the hot water during non-peak hours of the utility for a preset time and for a preset period of time depending on such criteria as water quality, public regulations and laws.

A solid-state radio frequency (SSRF) water heating apparatus is disclosed. In embodiments, the SSRF water heater includes a water tank, SSRF generator array and RF sensors enclosed within an RF-shielded cage. The SSRF array synthesizes RF signals in the microwave range and transmits the RF energy through the water tank, exciting and heating the water molecules without direct contact. The RF sensors at the opposite end of the tank sense residual RF energy not absorbed by the water. Control processors regulate the generation and transmission of the RF energy based on the sensed residual energy. The heated water and/or generated steam is piped to hot water dispensers, beverage makers, or steam ovens.

A gas flow controller for use with a gas powered water heater includes a first gas flow valve, and a first gas flow valve actuator assembly connected to the first gas flow valve and configured to hold the first gas flow valve in an open position. The first gas flow valve actuator assembly includes a first electromagnetic actuator, a corrosion resistant material encapsulating the first electromagnetic actuator, a first wire lead connected to the first electromagnetic actuator at a first solder joint, a corrosion resistant material encapsulating the first solder joint, a second wire lead connected to the first electromagnetic actuator at a second solder joint, and a corrosion resistant material encapsulating the second solder joint.

Provided is a hot water supply tank including: a case forming an appearance of the hot water supply tank; a heating container accommodating a fluid and having an inner side treated with anticorrosive; a heater installed on an outer side of the heating container and transferring heat to the fluid; and a heat insulator interposed between the case and the heater, wherein in a predetermined volume of the heating container, a ratio at which a performance of the heater to transfer heat (hereinafter, heat transfer performance) is maximized (hereinafter, optimum ratio) among the ratios of side height to bottom diameter of the heating container (hereinafter, aspect ratios) is determined by whether the heater is installed on the bottom as well as side of the heating container, and determined based on an area of the heating container occupied by the heater (hereinafter, heat transfer area).

A hot water generation apparatus and a water purifier including the same includes: a collection space inside a case member that is disposed above a receiving space in which raw water is accommodated, and has an inclination surface having a predetermined angle of inclination, and a steam outlet through which steam can be discharged is disposed above the collection space, separately from a hot water outlet, so that steam is removed in advance through the steam outlet along the inclination surface before hot water is discharged to the outside. Therefore, since hot water free of steam is discharged and a regular flow of hot water is formed in a straight line along the direction of gravity, user safety is enhanced, aesthetics are improved, and the best user experience can be provided.

A gas flow controller for use with a gas powered water heater includes a first gas flow valve, and a first gas flow valve actuator assembly connected to the first gas flow valve and configured to hold the first gas flow valve in an open position. The first gas flow valve actuator assembly includes a first electromagnetic actuator, a corrosion resistant material encapsulating the first electromagnetic actuator, a first wire lead connected to the first electromagnetic actuator at a first solder joint, a corrosion resistant material encapsulating the first solder joint, a second wire lead connected to the first electromagnetic actuator at a second solder joint, and a corrosion resistant material encapsulating the second solder joint.

An electrical heater device comprises an heating element, which includes two electrodes and a heating body made of a polymer-based material having a PTC effect, in contact with the electrodes. Each electrode comprises a meshed structure, which extends in a length direction and in a width direction, and is embedded at least partially in the heating body. Each electrode further comprises an electrical-distribution element which is fixed to the meshed structure and includes a distribution portion that extends in the length direction, or in the width direction, or in both the length and width directions of the meshed structure.

A water heater tank has several components formed of a one-piece seamless construction. The water heater tank includes a cylindrical wall with inner and outer surfaces. A helical condenser channel may be formed in the outer surface of the cylindrical wall. The water heater includes a cold water inlet. A cold water channel may be formed in the inner surface of the cylindrical wall in fluid communication with the cold water inlet and the interior volume of the tank.

A system and a method for preventing bacteria growth and proliferation, and particularly the Legionella bacteria, in a water tank of an electric water heater is described. A small pump is mounted on the water heater and has a power rating greater than the domestic water supply. The pump is controlled by a controller to pump hot water from the upper region of the tank to the lower region of the tank. The pump is connected between the hot water outlet of the tank and the cold water inlet to which an elongated dip tube is secured and with its discharge end positioned in close proximity to the bottom wall of the tank. The controller has a timer and is programmed to pump the hot water during non-peak hours of the utility for a preset time and for a preset period of time depending on such criteria as water quality, public regulations and laws.