Techniques regarding water heating control and hot water tanks are provided herein. For example, one or more embodiments described herein can regard a device or system for water tank heating regulation. The system can comprise a processor that executes computer executable components stored in a memory. The system can also comprise a mounting component that couples the system to a thermostat of a water heater. The system can further comprise an adapter component that attaches to a temperature adjustor of the thermostat; and a configuration component of the computer executable components that, when enabled by the processor, causes the adapter component to move the temperature adjustor make a temperature change at the thermostat.

A heat exchanger according to the present disclosure includes a plurality of tubes through which heating water flows, a housing having an interior space in which the plurality of tubes are disposed and through which a combustion gas passes, the housing including a plurality of flow passage caps connected with distal ends of the plurality of tubes to cause the heating water to flow through the flow passage caps, a temperature sensor brought into close contact with an area between two flow passage caps adjacent to each other among the plurality of flow passage caps to obtain a temperature, and a bracket coupled to the housing to bring the temperature sensor into close contact with the area between the adjacent two flow passage caps.

A water heater system includes a water heater having a first water outlet and a second water outlet. The water heater system further includes a flow detection device coupled to the first water outlet to detect a water flow through the first water outlet. The water heater system also includes a flow control valve fluidly coupled to the second water outlet. The flow control valve is configured to control a flow of water through the second water outlet based on whether the water flow through the first water outlet is detected by the flow detection device.

Methods and compositions for controlling and monitoring residential and commercial pumping systems. Preferably, the controlling and monitoring functions include a remotely located controller component capable of displaying alerts and/or from which a user may input commands regulating the functioning of the plumbing system. In particularly preferred examples, the plumbing system is an on command hot water system in which hot water availability, use and energy efficiencies and conservation are monitored and maximized.

A hot water supply system that can reduce energy consumption is provided. The hot water supply system includes a liquid heater for heating a liquid, a liquid-water heat exchanger, a water-heating circuit in which the liquid is circulated between the liquid heater and the liquid-water heat exchanger, a lower outward path for leading water from a lower part of a hot water storage tank to the liquid-water heat exchanger, the upper return path for leading the water from the liquid-water heat exchanger to an upper part of the hot water storage tank, a middle outward path for leading the water from a middle part of the hot water storage tank to the liquid-water heat exchanger, a middle return path for leading the water from the liquid-water heat exchanger to a middle part of the hot water storage tank.

Disclosed herein are WIFI and could enabled temperature control systems. The temperature control systems are configured to receive user temperature settings and preferences, and control a water heater based on the user temperature settings and preferences. The temperature control systems include two or more sampling rates for enabling a higher efficiency of operation compared to conventional water heaters.

A heat pump boiler is disclosed. The heat pump boiler includes a compressor. The heat pump boiler further includes an exterior heat exchanger that is configured to transfer heat between refrigerant and exterior air. The heat pump boiler further includes an interior heat exchanger that is configured to transfer heat between refrigerant and water. The heat pump boiler further includes a channel change valve that is configured to provide refrigerant compressed by the compressor to the exterior heat exchanger or the interior heat exchanger. The heat pump boiler further includes a first boiler heat exchanger that is configured to heat water that has passed through the interior heat exchanger from heat generated through combustion. The heat pump boiler further includes a second boiler heat exchanger that is configured to transfer heat between refrigerant and gas discharged from the first boiler heat exchanger.

A hot water storage arrangement having an electronic control unit, by means of which various modes of operation of the storage arrangement can be set. Those modes of operation can represent a normal mode of operation (at a setpoint temperature of between 30 C. and 100 C.), a frost protection mode of operation (at a temperature <10 C. and >1 C.), a time switch mode of operation (in which it is possible to set times of different setpoint temperatures with an adjustable time switch), an ECO mode of operation (in which an electronic temperature limit of between 30 C. and 55 C. is set), a hygiene mode of operation (in which a periodic increase in temperature of 55 C. is set) and/or and run-dry detection mode of operation (in which a temperature difference between a first temperature and a second temperature after heating of the hot water storage arrangement is ascertained).

The present disclosure relates to a method for preventing freezing when a four-way valve in a heat pump water heater is failed, including following acts: S1, it is judged that whether current water temperature T is lower than a preset minimum temperature T.sub.min for the water tank, if yes, perform act S2; if no, perform act S1 again; S2, it is judged that whether a cooling rate Td of the current water temperature T is greater than or equal to a preset rate T; or, it is judged that whether the current water temperature T satisfies T<T.sub.mina and whether T<T.sub.mina stands for a first time period t1, in which a is a limit value of a temperature difference; if at least one yes, perform act S3, otherwise, return to act S1; S3, a heat pump system is controlled to stop and an electric auxiliary heating system is started.

The present disclosure provides a computer-implemented method of defrosting a heat pump of a water provision system installed in a building, the water provision system comprising the heat pump configured to transfer thermal energy from outside the building to a thermal energy storage medium inside the building and a control module configured to control operation of the heat pump, the water provision system being configured to provide water heated by the thermal energy storage medium to an occupant of the building at one or more water outlets, the method being performed by the control module and comprising: determining, based on performance of the heat pump, an expected start time of a next defrost cycle; and preparing the water provision system before the expected start time of the next defrost cycle.