Disclosed in the present disclosure is a method, an apparatus and a system for adaptive control of a gas device for combustion appliances. The multidimensional information corresponding to each of the combustion appliances, such as the type of each of the combustion appliances, the using object for each of the combustion appliances, and the ambient parameter in the space where each of the combustion appliances is located, are acquired automatically when it is detected that there are combustion appliances with gas combustion demands in a current time period are detected, a gas output control parameter for each of the combustion appliances is generated automatically according to the multidimensional information of all the combustion appliances, and the gas device is controlled to deliver the required gas to each of the combustion appliances according to the gas output control parameter corresponding to each of the combustion appliances.

The traditional flue gas internal circulation diffusion type gas burner has only one main flame, so that the proportion of internal circulation flue gas directly participating in the internal flame is very low, the present invention belongs to the technical field of gas burners, and particularly relates to an array type flue gas circulation gas burner, comprising single flue gas burning modules, wherein the flue gas burning modules are arranged in an annular array; each of the flue gas burning modules is capable of circulating flue gas separately; and the flue gas burning modules arranged in the array share a gas source and an air source.

Adjustable length crossover tubes for gas grills are disclosed. Methods of making and using adjustable length crossover tubes for gas grills are also disclosed.

A gas distribution unit includes a main flow passage and a plurality of distribution flow passages that branch from the main flow passage and supplies a fuel gas to each of groups of a plurality of nozzles. A main body includes a main depressed portion that forms the main flow passage, a plurality of depressed portions that form the respective distribution flow passages, and fuel gas inlets provided at upstream ends of the respective depressed portions and communicated with the main depressed portion. Among the inlets, the inlet of the depressed portion corresponding to the group including the largest number of the nozzles is formed to have a diameter larger than diameters of the inlets of the other depressed portions, and the inlet having the large diameter is formed to have a thickness in a center axis direction smaller than thicknesses of the inlets of the other depressed portions.

A combustion device includes a solenoid valve configured to open and close an inflow port and an additional solenoid valve configured to open and close a communication port selectively mountable at an upstream end of a distribution flow passage with a small number of nozzles. When the additional solenoid valve is mounted, a state of supplying a fuel gas to only a distribution flow passage with a large number of the nozzles by opening the solenoid valve and closing the additional solenoid valve and a state of supplying the fuel gas to two distribution flow passages by opening the solenoid valve and opening the additional solenoid valve are mutually switchable. When the additional solenoid valve is not mounted, a state of supplying the fuel gas to the two distribution flow passages by opening the solenoid valve and a state of not supplying the fuel gas are mutually switchable.

A fuel gas supply apparatus includes: a pressure reducing valve that reduces, to a preset pressure, a pressure of fuel gas supplied from a tank that stores the fuel gas; and a supply amount adjustment unit that adjusts, by selecting a fuel supply channel passing through at least one of two orifices that are provided on a downstream side of the pressure reducing valve and have different orifice diameters, a supply amount of the fuel gas from the fuel supply channel. According to the fuel gas supply apparatus, a mechanism for suppressing pressure fluctuations of the fuel gas is unnecessary, and thus the entire fuel gas supply apparatus can be accordingly reduced in size.