A water heater appliance includes a tank extending along a vertical direction between a top end wall and a bottom end wall and a dip tube extending from an inlet end to an outlet end. The inlet end of the dip tube is coupled to a cold water inlet in the top end wall of the tank. The outlet end of the dip tube may be positioned in a bottom corner of the tank and/or positioned at an outer perimeter of the bottom end wall.

A water heater appliance and methods for operating the same, as provided herein, may include a casing, a tank, an inlet conduit, an electric heating system, a mixing valve, and a controller. The electric heating system may be in thermal communication with the tank. The mixing valve may be mounted to the casing downstream from the tank. The controller may be operably coupled to the electric heating system and the mixing valve. The controller may be configured to initiate a mixing cycle. The mixing cycle may include detecting a flow demand at the water heater appliance, directing the mixing valve to a programmed park position in response to detecting the flow demand, determining expiration of a park period following directing the mixing valve to the programmed park position, and releasing the mixing valve from the programmed park position in response to determining expiration of the park period.

The present invention discloses is a method for collecting a temperature of a heating pipeline, the method comprising: collecting a circuit signal of a heating resistor; calculating a current resistance value of the heating resistor according to the circuit signal; and calculating a current temperature of the heating pipeline according to the current resistance value. By using the method for collecting the temperature of the heating pipeline, measurement of the temperature of the heating pipeline can be realized by directly measuring the resistance value of the heating resistor in the heating pipeline, which may avoid the use of an additional temperature sensor, thereby reducing the number of connecting wires or other accessories.

The present invention discloses is a method for collecting a temperature of a heating pipeline, the method comprising: collecting a circuit signal of a heating resistor; calculating a current resistance value of the heating resistor according to the circuit signal; and calculating a current temperature of the heating pipeline according to the current resistance value. By using the method for collecting the temperature of the heating pipeline, measurement of the temperature of the heating pipeline can be realized by directly measuring the resistance value of the heating resistor in the heating pipeline, which may avoid the use of an additional temperature sensor, thereby reducing the number of connecting wires or other accessories.

A smart electric heating device comprises a storage unit, a first heating unit, a second heating unit, a control unit and a first temperature sensing unit. With the first temperature sensing unit to obtain an ambient temperature, the control unit compares the ambient temperature with a maximum increased temperature and a set temperature for controlling the first heating unit and the second heating unit to actuate. In this way, each user can use hot water of sufficient temperature better.

The disclosed technology includes a gas delivery system for controlling a target gas input rate of a fluid heating device. The system can include a sensor configured to measure a temperature of a gas flowing in a gas flow path, a modulating orifice in fluid communication with the gas flow path, and a motor in mechanical communication with the modulating orifice. The system can further include a controller configured to receive temperature data indicative of the temperature of the gas. The controller can determine a target cross-sectional area of the modulating orifice based at least in part on the target gas input rate and the temperature of the gas and, in response, output a signal to the motor to transition the modulating orifice from a first position to a second position having the target cross-sectional area.

An integrated valve and flow sensor for a water heater can have a valve body that includes a valve and a flow sensor for measuring the flow of water through the valve. The integrated valve and flow sensor can be disposed within a fitting that can be attached to a water heater. An actuator for opening and closing the valve can be attached to the fitting. A diffuser can also be attached to the fitting.

A dielectric fitting includes a nut having inner threads and an axial compression surface, and a hole having a first diameter. A mating component includes outer threads that engage with the inner threads including a second axial compression surface. A first fitting includes a circumferential flange captured between the first axial compression surface and the second axial compression surface, the first fitting having a first wall that extends axially and passes through the first hole and includes first fitting threads. A second fitting includes second fitting threads that engage with the first fitting threads, the second fitting having a second wall and a bulge portion that radially projects to a second diameter and includes an O-ring. The nut and the mating component are dielectrically isolated from the first fitting and the second fitting, and the second diameter is larger than the first diameter.

A water heater appliance includes a tank extending along a vertical direction between a top end wall and a bottom end wall and a dip tube extending from an inlet end to an outlet end. The inlet end of the dip tube is coupled to a cold water inlet in the top end wall of the tank. The outlet end of the dip tube may be positioned in a bottom corner of the tank and/or positioned at an outer perimeter of the bottom end wall.

A mixing valve for a water heater appliance includes a valve body that defines a mixing chamber, the mixing chamber being in fluid communication with a cold water inlet conduit and a hot water inlet conduit. A plunger valve is mounted within the valve body and is moveable along a translation axis to regulate a flow of water from the hot water inlet conduit and the cold water inlet conduit. A controller periodically initiates a cleaning cycle wherein the plunger valve is moved through a full range of motion (e.g., full hot to full cold). The cleaning cycle may only be performed if there is no water flowing through the mixing valve, e.g., as determined by temperature sensor measurements.