Provided is an instant water heater. The instant water heater includes a housing, a water inlet pipe, a water outlet pipe, a mounting member, and an electric controller. The housing has a heating container inside. The heating container includes a cap and a water tank detachably connected to the cap. A heating pipe is disposed within the water tank. The water inlet pipe is in communication with a first side of the cap. The water outlet pipe is in communication with a second side of the cap. The water inlet pipe and the water outlet pipe are connected to two sides of the housing, respectively. The mounting member is configured for securing the water tank to the housing. The electric controller is configured for controlling the heating pipe. By providing stability of the heating container, the provided instant water heater can optimize distribution and installation of components.

Provided is an instant water heater. The instant water heater includes a housing, a water inlet pipe, a water outlet pipe, a mounting member, and an electric controller. The housing has a heating container inside. The heating container includes a cap and a water tank detachably connected to the cap. A heating pipe is disposed within the water tank. The water inlet pipe is in communication with a first side of the cap. The water outlet pipe is in communication with a second side of the cap. The water inlet pipe and the water outlet pipe are connected to two sides of the housing, respectively. The mounting member is configured for securing the water tank to the housing. The electric controller is configured for controlling the heating pipe. By providing stability of the heating container, the provided instant water heater can optimize distribution and installation of components.

A water heater control system the water heater system comprising a rechargeable and non-rechargeable power source. In one or more examples, a controller such as a microcontroller of the water heater system is configured to receive power from the non-rechargeable power source and does not receive power from the rechargeable power source. Various other components of the water heater system are configured to receive power from the rechargeable power source. The system may comprise an energy storage system electrically connected to a pilot valve operator and electrically isolated from a main valve operator. The controller may be configured to recognize a call for main burner operation and may also be configured to check an available voltage of the energy storage system against a setpoint.

A water heater has one or more heating elements and an internal wall that causes an increased rate of heating within a sub-volume within the water heater tank. Water from the sub-volume is directed to the tank outlet.

A water heater has one or more heating elements and an internal wall that causes an increased rate of heating within a sub-volume within the water heater tank. Water from the sub-volume is directed to the tank outlet.

This disclosure is related to devices, systems, and techniques for outputting an alarm signal in response to detecting a leak in a water heater device. For example, a water heater device includes a leak sensor, an intermittent pilot light, and a circuit. The circuit includes processing circuitry configured to receive, from the leak sensor, an electrical signal including information indicative of a leak in the water heater device, activate, based on the electrical signal including information indicative of the leak, an alarm device, where the alarm device is powered for at least a period of time by a power source, where the power source is configured to receive energy from a thermoelectric device, and maintain an amount of energy stored by the power source so that the amount of energy is sufficient for the power source to supply energy to the alarm device.

A processor for a controller of a water heater is configured to receive water heater control parameters and an output from a sensor indicating a measured temperature of water in the water heater. The processor is also configured to determine whether to enter an anti-stacking control mode or to enter a demand anticipation control mode. In the anti-stacking control mode the processor is configured to initiate a call for heat when the measured temperature reaches a trigger temperature, calculate a burner on delay value and set a second timer with the calculated value, and calculate a reduced activation time. In the demand anticipation control mode the processor is configured to increase the variable offset based on a frequency of the demand anticipation control mode being activated, initiate a call for heat, and control, based on the reduced activation time or the increased offset value, the burner.

A controller provides power to a water heater having upper and lower heating elements. Various options for measurement units to measure electrical parameters reflecting the state of the water heater are implemented to provide sensing of a desired parameter, whether the controller is powering the heating elements or not. A power relay is operably connected to power a testing or sensing circuit in one embodiment whenever the relay switches away from powering the water heater. In another embodiment, sensing circuits operate both during powered operation or non-powered condition for heating elements. Component damage and wear is greatly reduced, while also providing the controller an ability to assess the state of the heating elements, assure hot water, and override conservation methods like off-peak use, voluntary load shedding, and the like, in favor of guaranteed hot water output, based on measurements even in “power-off” conditions.

A controller provides power to a water heater having upper and lower heating elements. Various options for measurement units to measure electrical parameters reflecting the state of the water heater are implemented to provide sensing of a desired parameter, whether the controller is powering the heating elements or not. A power relay is operably connected to power a testing or sensing circuit in one embodiment whenever the relay switches away from powering the water heater. In another embodiment, sensing circuits operate both during powered operation or non-powered condition for heating elements. Component damage and wear is greatly reduced, while also providing the controller an ability to assess the state of the heating elements, assure hot water, and override conservation methods like off-peak use, voluntary load shedding, and the like, in favor of guaranteed hot water output, based on measurements even in “power-off” conditions.

Methods and systems for water heater system receiving electrical power from an electrical grid. The system includes an electronic processor configured to monitor an average water temperature of the water within a water tank of the system based on a first and second signal from an upper and lower temperature sensor, operate an upper heating element heating an upper portion of the tank and a lower heating element heating a lower portion of the tank in a first operation mode, receiving, via a transceiver, either an add load command or a shed load command from a grid controller, operating the upper heating element and lower heating element in a second mode in response to receiving the add load command, and operating the upper heating element and lower heating element in a third mode in response to receiving the shed load command.