Abstract: The sensor device has a casing housing a circuit board and a replaceable sensor on the circuit board. The casing has an opening corresponding to the sensor location and a manually removable cap is reliably positioned in the opening. Once the cap is removed, the sensor can be easily accessed and replaced. The cap is integrated with the casing smoothly so that the appealing of the outlook of the sensor device is minimally affected.

Abstract: The oxygen sensing device contains a power circuit supplying the electricity required, an oxygen sensor for detecting the oxygen concentration in the atmosphere, an alarm system issuing an audible or visual alarm signal, and a controller. The controller is a computing device having a preset threshold value that continuously obtains the current oxygen concentration from the oxygen sensor. The controller then can calculate and obtain the variation rate of the oxygen concentration in a unit time. If the controller detects that the current oxygen concentration is about to drop below the threshold value, it will activate the alarm system to issue an alarm to alert people to take immediate and proper action.

Abstract: A gas water heater includes a piping disposed in a housing for receiving a fluid to be heated, a gas burner for receiving a gaseous fuel and for generating a heat to heat the fluid flowing through the piping, and a regulating device coupled to the gas burner for adjusting the supplying of the gaseous fuel to the gas burner. A nitric oxide detector is disposed in the housing for detecting the nitric oxide compounds generated by the gas burner, and a control device is coupled to the nitric oxide detector for receiving the detected signal from the nitric oxide detector and for operating the regulating device to adjust the supplying of the gaseous fuel to the gas burner and for allowing the gaseous fuel to be completely burned.

Abstract: A gas water heater includes a piping disposed in a housing for receiving a fluid to be heated, a gas burner for receiving a gaseous fuel and for generating a heat to heat the fluid flowing through the piping, and a regulating device coupled to the gas burner for adjusting the supplying of the gaseous fuel to the gas burner. A carbon dioxide detector is disposed in the housing for detecting the carbon dioxide or carbon monoxide generated by the gas burner, and a control device is coupled to the carbon dioxide detector for receiving the detected signal from the carbon dioxide detector and for operating the regulating device to adjust the supplying of the gaseous fuel to the gas burner and for allowing the gaseous fuel to be completely burned.

Abstract: A gas appliance includes a pilot burner, one or more main burners, a solenoid valve coupled to the pilot burner and the main burners for controlling the pilot burner and the main burners, and a control circuit coupled to the solenoid valve for controlling the solenoid valve to operate the pilot burner or the main burner remotely. An igniting device may be coupled to the control circuit for being operated by the control circuit to selectively ignite the pilot burner. One or more batteries may be coupled to the control circuit for energizing the control circuit, and a thermo-couple may be coupled to the control circuit for selectively energizing the control circuit when the battery is out of electricity.

Abstract: A gas appliance includes a pilot burner, one or more main burners, a solenoid valve coupled to the pilot burner and the main burners for controlling the pilot burner and the main burners, and a control circuit coupled to the solenoid valve for controlling the solenoid valve to operate the pilot burner or the main burner. An igniting device may be coupled to the control circuit for being operated by the control circuit to selectively ignite the pilot burner. One or more batteries may be coupled to the control circuit for energizing the control circuit, and a thermo-couple may be coupled to the control circuit for selectively energizing the control circuit when the battery is out of electricity.

Abstract: A ventilating hood for a water heater includes a housing having an inside formed with an air chamber, a substantially V-shaped guide board mounted in the air chamber of the housing and located between two opposite sides of the housing, and two movable boards each pivotally mounted on a respective one of the two opposite sides of the housing and each facing the guide board. Thus, the waste gas is drained outwardly from the air outlet ports of the housing smoothly and exactly by guidance of the guide board and the movable boards, thereby enhancing the air circulation in the air chamber of the housing, and thereby enhancing the working efficiency of the water heater.

Abstract: A remote controller assembly includes remote controller assembly, comprising a remote controller, and a fixture detachably mounted on the remote controller. Thus, the fixture is fully hidden in the back face of the remote controller, so that the fixture is not exposed from the remote controller, thereby enhancing the aesthetic quality of the remote controller. In addition, the sliding space of the fixture is slidable on the mounting seat of the remote controller, and the guide hooks of the fixture are guided by the guide rails of the mounting seat when the remote controller is axially movable toward the fixture, so that the remote controller is attached to the fixture easily and rapidly, thereby facilitating a user attaching the remote controller to the fixture.

Abstract: A gas control knob includes a valve body, a valve seat mounted on the valve body, a control lever movably mounted in the valve seat and movable by a pressing action to regulate a gas flow rate of the valve body, a fixing bracket mounted on the valve body, a motor mounted on the fixing bracket, a transmission mechanism mounted on the fixing bracket and driven by the motor, and a linear displacement mechanism mounted on the fixing bracket and driven by the transmission mechanism to perform a linear motion to press the control lever to regulate the gas flow rate of the valve body automatically. Thus, the gas control knob is operated and controlled automatically, thereby facilitating a user operating the gas control knob.

Abstract: A gas control knob includes a main body having a gas inlet hole and a gas outlet hole, a throttling cock rotatably mounted in the main body to regulate the gas flow rate between the gas inlet hole and the gas outlet hole of the main body, a rotation lever rotatably mounted on the main body to rotate the throttling cock, and a motor mounted on a fixing bracket to drive a transmission mechanism automatically which drives a clutch mechanism to drive and rotate the rotation lever to rotate the throttling cock. Thus, the gas control knob is operated manually or automatically, thereby facilitating a user operating the gas control knob.

Abstract: A gas control knob for a gas stove includes a main body having a gas chamber connected between a gas inlet hole and a gas outlet hole, a throttling cock rotatably mounted in the main body to regulate a gas flow rate between the gas inlet hole and the gas chamber, and an electromagnetic valve mounted on the main body to control connection between the gas chamber and the gas outlet hole of the main body. Thus, the electromagnetic valve is operated to open or close the fire automatically after the rotation lever is rotated to a determined extent, thereby facilitating a user opening or closing the fire of the gas stove.

Abstract: A gas control knob includes a valve body, a valve cap, a rotation lever, a cam, and a spring. Thus, when the rotation lever is rotated to regulate the gas flow rate, the engaging tooth of the cam is axially and reciprocally movable on the toothed face of the track of the valve cap synchronously to produce vibration and sound during rotation of the rotation lever, thereby providing a notification function to the user so as to assure the safety when using the gas stove.

Abstract: A gas control knob includes a main body having a gas inlet hole and a gas outlet hole, a throttling cock rotatably mounted in the main body to regulate the gas flow rate between the gas inlet hole and the gas outlet hole of the main body, a rotation lever rotatably mounted on the main body to rotate the throttling cock, and a motor mounted on a fixing bracket to drive a transmission mechanism automatically which drives a clutch mechanism to drive and rotate the rotation lever to rotate the throttling cock. Thus, the gas control knob is operated manually or automatically, thereby facilitating a user operating the gas control knob.

Abstract: A water heater includes a housing, an air box, and two windproof hoods. Thus, the waste gas produced by the burner is drained outward smoothly and regularly even when the air current of the ambient environment is disposed at an abnormal and unstable state, so that the water heater has an enhanced air circulation, thereby facilitating operation of the water heater. In addition, the drain pipe is protected by each of the two windproof hoods to achieve a windproof and rainproof effect.

Abstract: A water heater includes a housing, an air box, two windproof hoods, and a catalyst converter. Thus, the catalyst converter converts the carbon monoxide produced during the combustion process of the burner into the carbon dioxide and the water, thereby preventing the waste gas containing the carbon monoxide from causing danger to a user so as to protect the user's safety. In addition, the waste gas containing the carbon dioxide is drained outward from the drain pipe, thereby preventing the waste gas from being gathered in the closed room.