Gas valve and cooking appliance capable of preventing fire flashback

Abstract

The invention provides a gas valve and a cooking appliance capable of preventing fire flashback. Through arrangement of a valve body, a hollow piston and two magnets, a constant proportion is maintained through gas pressure and wind pressure of the gas valve, so that a gas entrance amount is automatically reduced when the wind pressure is reduced, and formation of negative pressure on one side ofa wind inlet tube is prevented so as to avoid a fire disaster caused by burning of fire flashback; when the wind pressure is less than a set value, the hollow piston cannot be moved under magnetic effects of two magnets and gas supply is synchronously cut off; through arrangement of a three-way tube and the gas valve, wind pressure in the three-way valve is used as driving power required by starting the gas valve, so that the wind pressure in the three-way valve becomes a precondition that allows the gas to be entered, and therefore, the gas entrance amount is automatically reduced when the wind pressure is reduced, and the formation of the negative pressure on one side of the wind inlet tube is prevented so as to avoid the fire disaster caused by the burning of the fire flashback; and further, an air blow port is formed in the three-way pipe, and with newly-added oxygen passing through the gas valve as cold air, air blowing on a circuit controller is carried out, so that effects of cleaning and cooling are achieved, and the service life of the cooking appliance is prolonged.

Description

technical field [0001] The invention relates to the technical field of energy-saving stoves, in particular to a gas valve and a backfire-proof stove. Background technique [0002] Nowadays, many energy-saving cookers, especially semi-premixed commercial energy-saving cookers, when the blower pipeline pressure drops to a certain value, the premixed gas will be backfired and burnt, causing a fire in severe cases. [0003] In addition, during the use of the cooking range, liquid is often poured into it, and these liquids flow into the oxygenation fan along the outlet pipe of the oxygenation fan, causing damage to the oxygenation fan. [0004] Third, most of the current energy-saving cooking appliances are equipped with electrical appliances such as control circuits, ignition circuits, and solenoid valves. Contents of the invention [0005] In view of this, the present invention proposes a gas valve and an anti-backlash cooker that can effectively prevent the premixed gas fro...

AI Technical Summary

Problems solved by technology

[0002] Now many energy-saving cookers, especially semi-premixed commercial energy-saving cookers, when the blower pipe pressure drops to a certain value, the premixed gas will be backfired and burnt, causing a fire in severe cases

[0003] In addition, during the use of the stove, liquid is often poured into it, and the liquid flows into the oxygenation fan along the outlet pipe of the oxygenation fan, causing damage to the oxygenation fan

[0004] Third, the current energy-saving cooker appliances are mostly equipped with electrical appliances such as control circuits, ignition circuits, and solenoid valves. The environment of the stove is relatively harsh: high temperature, humidity, and excessive oily smoke, which are prone to failure or shortened service life.

Images