A glue rewarming device includes a glue pipe, a main body, a plurality of temperature sensors, a timer, and a control terminal. Each glue pipe is configured to receive glue. The main body defines the grooves spaced apart from each other. Each groove is configured to receive one glue pipe. Each temperature sensor is in one groove and on an inner wall of the one groove. The temperature sensor is configured to sense a temperature of the glue in the glue pipe inserted into the corresponding groove. The timer is configured to record a time point when the glue pipe is placed in one groove and a time length from the time point when the glue pipe is placed in one groove to the time when the glue in the glue pipe reaches a target temperature. The control terminal is electrically connected to the timer and the temperature sensors.

A glue rewarming device includes a glue pipe, a main body, a plurality of temperature sensors, a timer, and a control terminal. Each glue pipe is configured to receive glue. The main body defines the grooves spaced apart from each other. Each groove is configured to receive one glue pipe. Each temperature sensor is in one groove and on an inner wall of the one groove. The temperature sensor is configured to sense a temperature of the glue in the glue pipe inserted into the corresponding groove. The timer is configured to record a time point when the glue pipe is placed in one groove and a time length from the time point when the glue pipe is placed in one groove to the time when the glue in the glue pipe reaches a target temperature. The control terminal is electrically connected to the timer and the temperature sensors.

A backlit temperature control knob for water heater valves used with water heaters and more particularly to gas water heaters provides a way to read the temperature indication not previously known in the art. Some embodiments rely on a thermocouple or thermopile normally used to power a safety magnet with the pilot light system as a source of electrical energy to selectively illuminate a Light Emitting Diode (LED) which directs light through at least a portion of the knob to assist in reading the temperature indications.

A method for controlling a water heater comprising: receiving report information transmitted by a user-wearable device at a predetermined frequency; determining whether a user is coming back according to user location information included in the report information; and if the user is coming back, turning on a return water pump to permit water outputted from a water outlet of the water heater to return to the water heater through a water return port. The present disclosure determines a movement direction and the user location by using report information transmitted by the user-wearable device. If the user is coming back, the return water pump is turned on to permit water to return, so that the user can take a hot bath immediately after arriving home, thereby improving user's experience.

A fluid sensor system detects one or more performance characteristics of a heating system that heats a fluid. The sensor system includes a probe having a finite length a portion of which is to be immersed in the fluid. The probe includes a resistive heating element and a fluid temperature sensor for measuring one or more performance characteristics, wherein the fluid temperature sensor is configured to measure a fluid temperature, and the resistive heating element is operable as a heater to create a temperature differential between the fluid and air to detect the fluid, and as a sensor to measure a fluid level.

A fluid sensor system detects one or more performance characteristics of a heating system that heats a fluid. The sensor system includes a probe having a finite length a portion of which is to be immersed in the fluid. The probe includes a resistive heating element and a fluid temperature sensor for measuring one or more performance characteristics, wherein the fluid temperature sensor is configured to measure a fluid temperature, and the resistive heating element is operable as a heater to create a temperature differential between the fluid and air to detect the fluid, and as a sensor to measure a fluid level.

A burner appliance is disclosed. The burner appliance includes a byproduct sensor in an exhaust flue and/or a barometric pressure sensor to detect an environmental pressure at the burner appliance. By calculating concentrations of combustion byproducts in the exhaust with the byproduct sensor, a controller can adjust blower speed and/or fuel rate to modify combustion efficiency. By calculating the environmental pressure at the burner with the barometric pressure sensor, the controller can adjust blower speed and/or fuel rate to modify combustion efficiency. The barometric-pressure data can also be used to adjust blower speed control bands, thereby calibrating the control bands based on environmental pressure. The environmental pressure can be indicative of altitude and/or weather conditions. Methods of operating said burner appliance are also disclosed.

This heating system consists of a ceiling or wall mounted housing containing a fan, motor, electric heater and optional controller which connects to a discharge vent via a duct which can all fit within a wall. It has primary usages as a room or shower heater where it can be recessed into a wall or ceiling where it intakes air from the room, heats it and routes it through an insulated duct in the wall and vents it back into the room near the floor. In a shower, the heater can be located high on the wall or in the ceiling away from the shower to keep it away from splashed water. Additionally, the heater and vent can both be mounted in the ceiling where the heater is outside the shower and the vent is in the shower. It can be controlled by a switch, wired thermostat or wireless remote.

A variable capacity furnace includes a variable capacity fuel valve configured to supply a fuel to a burner, where the variable capacity fuel valve is configured to be controlled to a target setting over a range of settings to modulate an amount or flow rate of the fuel supplied to the burner. The variable capacity furnace also includes a control assembly having processing circuitry and memory circuitry. The memory circuitry includes instructions stored thereon that, when executed by the processing circuitry, cause the processing circuitry to execute a control algorithm to determine, based on whether an indoor temperature is progressing toward a set point over time and based on a temperature differential between the set point and the indoor temperature, a target setting of the variable capacity fuel valve. The instructions also cause the processing circuitry to control the variable capacity fuel valve to the target setting.

Provided is a water heater including a burner that receives a supply of combustion air from a fan, a heat exchanger having a heat transfer tube, and a combustion chamber case in which a combustion chamber of the burner is formed in the interior thereof and which is to be capable of guiding combustion gas generated by the burner to the heat exchanger. The water heater further includes a unit case that surrounds the combustion chamber case, and a region on the outside of the combustion chamber case within the unit case serves as an air pressure chamber having a higher pressure than the combustion chamber. Thus, combustion gas leakage to the outside can be prevented or suppressed appropriately by means of a simple configuration.