A gas appliance with automatic safety ignition function

Abstract

The invention discloses a gas appliance with automatic safety ignition function, which comprises a burner, a gas nozzle, a gas delivery pipe and an ignition device, one end of the gas delivery pipe is connected to the burner through a gas nozzle, and the ignition device includes a hot surface igniter And the expansion valve, the hot side igniter is close to the burner, the expansion valve includes a temperature sensing package, a valve body and an expansion power conduit, the temperature sensing package is arranged on the hot side igniter, and the temperature sensing package is connected to the valve body through the expansion power conduit, The temperature sensing bulb and the expansion power conduit are filled with expansion liquid, the valve body has a gas inlet and a gas outlet, and the gas outlet of the valve body is connected with the other end of the gas delivery pipe. The invention can completely cut off the gas delivered to the gas delivery pipe, without the possibility of accidental extinguishment, and can automatically reset the ignition without manual reset, high yield, durable, low cost of use, and the ignition device completely heats the gas and electricity Isolation is separated, there is no possibility of deflagration, and the safety is high.

Description

Technical field [0001] The present invention relates to the technical field of gas appliances, and more specifically, to a gas appliance with automatic safety ignition function. Background technique [0002] Traditional gas appliances are generally composed of burners, gas nozzles, gas delivery pipes and ignition devices. Among them, the ignition device can be composed of a valve body with a thermocouple and a long open flame. Its structure is simple, but the ignition device is not The gas can be completely cut off, and the constant temperature cannot be completely achieved. It can only slow down the rate of temperature rise, and cannot achieve automatic ignition. In addition, once the long open flame is accidentally extinguished, heating can only be restarted after manual resetting. [0003] For this reason, an ignition device composed of a silicon carbide hot surface igniter and a bimetallic safety valve has appeared on the market. The ignition device completely cuts off the gas...

AI Technical Summary

Problems solved by technology

[0003] For this reason, an ignition device consisting of a silicon carbide hot surface igniter and a bimetallic safety valve has appeared on the market. , but the silicon carbide hot surface igniter is not resistant to pollution, water, and vibration. It has high requirements for the use environment and transportation protection, and has a high failure rate. Moreover, the bimetallic safety valve has high requirements for the processing accuracy of the bimetallic sheet. At present, there are generally only Imported bimetal sheets from Japan can meet the processing accuracy requirements, and the cost is high

In addition, the design disadvantage of the bimetal safety valve is that electric heating and gas are carried out in the same closed space, and once sparks are generated, there will be a possibility of deflagration

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