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Safety-type double-gas-source gas control system and control method

A control system and dual gas source technology, applied in heating systems, heating methods, household heating, etc., can solve problems such as danger, and achieve the effect of eliminating worries and saving electricity

Active Publication Date: 2015-11-18
ZHEJIANG FUERJ ELECTRIC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are a variety of gas supplies on the market, such as liquefied petroleum gas, natural gas, etc., and the corresponding gas appliances are also divided into liquefied petroleum gas, natural gas, etc., because the characteristics of various gases are different (such as calorific value, etc.), use gas nozzles with low calorific value gas The caliber is larger than the gas appliance using high calorific value gas, so when the nozzle of low calorific value gas (such as natural gas) introduces high calorific value gas (such as: liquefied petroleum gas) by mistake, the flame produced by the gas appliance will be very high, then will be dangerous

Method used

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  • Safety-type double-gas-source gas control system and control method
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  • Safety-type double-gas-source gas control system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0063] Embodiment: a kind of safe type dual gas source gas control system, such as Figure 1-27 As shown, including low calorific value regulator valve 1, high calorific value regulator valve 2 and:

[0064] The switch control valve 3 is used as the main switch of the gas circuit to control the on-off of the gas circuit. It is connected to the low calorific value regulator valve 1 and the high calorific value regulator valve 2 respectively. The pilot gas gas circuit 6, and the other one is the main gas circuit 5 leading to the main burner 4, and the pilot gas channel leads to the high calorific value gas ignition device 7 or the low calorific value gas ignition device 8 through gear switching;

[0065] The high and low calorific value gas ignition devices 7 and 8 each include an ignition needle 9a, 9b, a thermocouple 10a, 10b and an injection tube 11a and 11b respectively adapted to high and low calorific value gas, wherein two thermocouples 10a and 10b Reverse serial connect...

Embodiment 2

[0080] Embodiment 2: Different from Embodiment 1, as Figure 28 , 29 As shown, the lower end of the lower valve stem is cylindrical, and the diameter of the lower end of the lower valve stem is smaller than the diameter of the nozzle mouth. The nozzle opening changes the effective intake cross-sectional area of ​​the nozzle opening.

Embodiment 3

[0081] Embodiment 3: as Figure 30 , 31 As shown, in this embodiment, the lower end of the lower valve stem 27 is cylindrical, a plurality of air holes 35 are provided at the nozzle opening, and an O-shaped sealing ring 34 is set on the lower end of the lower valve stem. It is separated from the nozzle opening to keep all the air holes connected; while in the high calorific value gear, the lower valve stem moves down so that the lower end of the lower valve stem blocks one of the air holes so that the effective intake cross-sectional area of ​​the nozzle opening changes.

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Abstract

The invention discloses a safety-type double-gas-source gas control system and control method. The control system comprises a high heating value gas firing device, a low heating value gas firing device and an on-off controlling valve used for controlling on or off of a gas circuit. The high heating value gas firing device and the low heating value gas firing device each comprise an ignition needle, a thermocouple and ejecting pipes suitable for high heating value gas and low heating value gas respectively, and the positive electrodes and the negative electrodes of the two thermocouples are in series connection in a reverse manner to be in tandem connection with a magnetic valve of the on-off controlling valve. According to the gas control system, due to the fact that the two thermocouples of the high heating value gas firing device and the low heating value gas firing device are in series connection in the reverse manner and are in tandem connection with the magnetic valve of the on-off controlling valve at the same time, in the ignition period, on or off of the on-off controlling valve is controlled through the condition whether the effective thermoelectric force is generated by the thermocouples or not, the dangerous condition that a high frame is generated by a main burner due to the misoperation of a gas appliance is prevented, and the safe utilization is guaranteed.

Description

technical field [0001] The invention relates to the technical field of combustion heaters, in particular to a safe dual-source gas control system and a control method. Background technique [0002] At present, there are a variety of gas supplies on the market, such as liquefied petroleum gas, natural gas, etc., and the corresponding gas appliances are also divided into liquefied petroleum gas, natural gas, etc., because the characteristics of various gases are different (such as calorific value, etc.), use gas nozzles with low calorific value gas The caliber is larger than the gas appliance using high calorific value gas, so when the nozzle of low calorific value gas (such as natural gas) introduces high calorific value gas (such as: liquefied petroleum gas) by mistake, the flame produced by the gas appliance will be very high, then would be dangerous. Contents of the invention [0003] Aiming at the deficiencies in the above-mentioned prior art, the present invention pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D19/10
Inventor 罗建富赵学庆
Owner ZHEJIANG FUERJ ELECTRIC SCI & TECH