Gas regulator , also known as gas regulator, is safe combustion of LPG as an important component , connectivity between the cylinder and the stove . Regulator can not only high-pressure LPG bottle into a low pressure liquefied petroleum gas ( down to 100 from 980 one thousand one thousand Pa Pa around ) , but also the low-pressure gas stoves secure stable combustion in a suitable pressure range. That is done by its output LPG stove fire in the hole pressure , anywhere at any time to the external pressure is greater than about 2940Pa , so in fact the regulator is an automatic voltage regulator device . People used to call it pressure reducer, is only noticed it buck function, and the ability to ignore its regulator . Regulator of the entire design cleverly fine , it is reflected in its ability to respect the regulator , this article intends to give a more detailed description of this area . The figure is a block diagram of the regulator , which is mainly from the hand wheel, the intake manifold , the valve cover, the valve cover, a rubber membrane , the inlet nozzle , the valve pad, a small lever , the trachea and other component parts. Regulator middle is a circular rubber membrane , which the regulator is divided into two chambers . There is a spring on the gas chamber , the top adjustment screw attached cover, attached to the lower end of the rubber membrane . At the edge of the bonnet has a diameter of 0.8 mm m holes , the upper chamber and the outside world , this hole aptly called breathing hole . Next there is a fine chamber made ​​of brass lever, a total length of about 5cm , turning performance is very sensitive . Right lever connected together with the rubber membrane center , left sticking valve pad , closely in the intake nozzle of the spray high-pressure LPG produces damping effect. This distance from the fulcrum lever left and right ends of the right to the left a short length , is unequal arm lever . Its performance characteristics are: the force of the lever right small changes left bound to the force of the lever to produce a greater change. In principle, the realization of the power amplification ; speaking , in effect , increasing the damping effect on the high-pressure gas . Working principle of gas regulator

In order to more clearly illustrate the working principle of the regulator , it is necessary to clarify this issue : Gas burner should have what conditions Combustion of solid fuels to be safe , to have two conditions : First, the amount of combustion air
 
Regulator works
( Air or oxygen ) , the second is burning material to maintain a certain temperature ( usually higher than the ignition point ) . Solid fuel , we have some of the unburned fuel in the conduction and radiation heat transfer , the combustion from the outside toward the center direction of development . Thermal expansion of the solid fuel , the volume becomes large , but not significant , the displacement is almost zero. Gas burner , the combustion portion of the unburned portion of the heat transfer , in addition to conduction and radiation, convection increased combustion development direction outward from the center . Gas combustion occurs when severe thermal expansion , and its resultant volume of hundreds of thousands of times before combustion volume , and at a faster rate shifted. So only satisfy the above two conditions are not safe combustion of the gas . Modern combustion theory tells us that the combustion gas safety must also have the third condition , namely, to maintain a certain size pressure difference is equal to the exit velocity of the gas burning speed. Only in this way a dynamic equilibrium in a certain range , the flame can be maintained stable , to achieve the security of the combustion gas . If the outlet pressure is too large, it will make the exit velocity is greater than the burning speed, causing the flame to leave a certain distance from the fire hole burning , a phenomenon termed from the flame . If the gas pressure continues to rise , the flame will be farther away from the fire hole burning , flame stability further damaged , erratic flame , until finally completely extinguished , a phenomenon called off the fire . Off the fire , the gas will continue to leak in the air to form a large number of toxic gases or explosive gases, can easily lead to accidents ; if the gas pressure is too small , will make burning faster than the exit velocity , causing the flame will continue to burn holes into the fire , this phenomenon is called tempering . Tempering , the formation of hypoxia incomplete combustion , producing large amounts of toxic gases, liquefied petroleum gas will spill out , but also easily lead to accidents. The engineering and technical personnel a lot of experiments , not only confirmed the safety of the combustion gas to maintain a certain pressure difference , but also confirmed that the different components of the gases , safety pressure difference needed for combustion is not the same . For example: artificial gas ,80-100mm water column ; LPG ,250-350mm water column . Previously mentioned 2940Pa It is these two values ​​averaged. Let us come back to the principle regulator . When we open the cylinder on the angle valve ( ie, ventilation switch ) , the high-pressure LPG rushed through the open intake valve pad into the next chamber , along with the increase of gas under the gas chamber , the gas chamber under pressure will rise, forcing rubber membrane upwardly convex . The air chamber volume gradually becomes small , when the air chamber pressure is greater than atmospheric pressure, the room air is discharged from the breathing hole slowly , a regulator completed during exhalation . In this process, the right end of the shift lever , then left under pressure, the intake nozzle gradually closed to stop gas supply, the lower chamber pressure does not rise . When you open the gas furnace switch, since gas outward output , lower gas chamber pressure becomes smaller, rubber membrane concave, driven down the left lever on the right move , the valve pad open , high pressure LPG into the next chamber . In this process , the volume of the gas chamber gradually increases , and when it is smaller than the external atmospheric pressure , the air from the Outer breathing hole into the upper air chamber , a suction pressure regulator complete the process . Therefore, in the stove combustion process, convex concave rubber membrane kept on the ground , the valve pads driven by the lever , but also with the constant close open . Throughout the dynamic changes , we just make sure the regulator lever, it left and right arm ( the right note left short and long ) long, with a reasonable proportion , coupled with a rubber membrane and spring lever right impose an appropriate size of the force , you can make the valve opening time is far less than the pad off time , and let these times there is a proper ratio . The proper ratio ensures that the gas chamber under pressure, always big 2940Pa than the gas chamber so. For the upper air chamber pressure is concerned, can be approximated think that was the outside atmospheric pressure value . This allows the gas to leave the pressure at the fire hole , always is greater than the atmospheric pressure around 2940Pa , gas combustion in the steady state . This is the design of the regulator 's first subtlety. The second subtlety , and in the breathing hole design, is so distinctive . First, why the breathing hole drilled in the valve cover on the edge Instead of drilling holes in the easy-to other locations Second, the breathing hole diameter of 0.8 mm m, only the minimum number of Embroidery needle through the aperture Why so small Holes drilled on the edge of the bonnet is to make it close to the rubber membrane . If the air chamber pressure is too large , the rubber film on the upwardly convex , breathing holes immediately blocked , preventing the air in the air chamber is discharged outwardly from the breathing hole . According to Boyle's Law shows that a particular , is sealed in the gas chamber a certain quality of air , the smaller the volume of the process, the pressure becomes larger and larger . That is pV = constant. Prevents the rubber membrane due to the upper and lower air pressure is too large disparity damaged , to avoid damage caused by LPG leakage due to diaphragm accident . Breathing hole diameter of 0.8 mm m, but the hole was in about 1cm deep , here the full application of the knowledge of fluid mechanics . Fluid in motion , due to internal friction blocking effect will exist . The smaller the hole size , the greater the depth , the greater the internal friction , the damping effect is obvious - the second flow rate becomes smaller. Thus, the upper chamber in the expiratory and inspiratory time , there is a long time process , thus ensuring the dynamic changes , the change in pressure when the LPG is not rapidly increase , nor is rapidly reduced , we can let the flame stable combustion , reflects the dynamic equilibrium of the adjustment process .