Gas distributor assembly and gas equipment

Abstract

This invention discloses a gas distributor assembly and a gas equipment, relating to the field of gas equipment technology. The gas distributor assembly includes a gas distributor body and at least two ejector devices. The gas distributor body has at least two gas outlets. The at least two ejector devices are correspondingly installed at the at least two gas outlets. Each ejector device has an ejector channel and a gas channel, with the inlet end of the gas channel connected to the gas outlet. The ejector channel has an inlet end, an outlet end, and a gas inlet. The inlet end is used to input air, the gas inlet is connected to the gas channel, and the outlet end is used to output a gas-air mixture. This invention extends the mixing path of air and gas, resulting in more complete mixing, more efficient combustion, and reduced nitrogen oxide emissions.

Description

Technical Field

[0001] This invention relates to the field of gas equipment technology, and in particular to a gas distributor assembly and a gas equipment. Background Technology

[0002] Gas equipment uses a gas distribution rod assembly to divert gas to meet the different gas requirements of the burner.

[0003] In related technologies, a gas nozzle is installed at the outlet of the gas distributor. The gas nozzle injects gas into the air inlet of the burner to draw in surrounding air for mixing. However, in this method, the gas nozzle usually injects gas in a straight line at a single point in the center to draw in the surrounding air. This may result in insufficient drawn air and uneven gas-air mixing, leading to incomplete combustion and the production of more carbon monoxide and nitrogen oxides. Summary of the Invention

[0004] The main objective of this invention is to provide a gas distribution rod assembly designed to improve the uniformity of gas-air mixing, thereby enabling complete combustion in the burner and reducing nitrogen oxide emissions.

[0005] To achieve the above objectives, the present invention proposes a gas distribution rod assembly, comprising a gas distribution rod body and at least two ejector devices. The gas distribution rod body is provided with at least two gas outlets. The at least two ejector devices are correspondingly installed at at least two of the gas outlets. Each ejector device is provided with an ejection channel and a gas passage, and the inlet end of the gas passage is connected to the gas outlet.

[0006] The ejector channel is provided with an air inlet, an air outlet, and a gas inlet. The air inlet is used to input air, the gas inlet is connected to the gas channel, and the air outlet is used to output a gas-air mixture.

[0007] In one embodiment of this application, the ejector device includes:

[0008] The main body, spaced apart from the gas distribution rod body, has both the ejector channel and the gas passage located within it; and

[0009] The gas connection pipe has one end connected to the gas distributor body and connected to the gas outlet, and the other end connected to the main body and connected to the gas passage.

[0010] In one embodiment of this application, the gas distribution bar body includes:

[0011] Intake pipe;

[0012] At least two branch pipes, both connected to the intake pipe; and

[0013] The vent pipe has at least two mutually isolated vent chambers, each of which is connected to one of the branch pipes;

[0014] Each of the gas outlet chambers is provided with a plurality of gas outlets, and each gas outlet is connected to a gas connection pipe; the plurality of gas connection pipes are arranged at intervals along the extension direction of the gas outlet pipe, and the extension direction of the ejector channel is set at an angle to the extension direction of the gas outlet pipe.

[0015] In one embodiment of this application, the main body is located to the side of the air outlet pipe;

[0016] The gas distribution rod body also includes a control component installed between the intake pipe and the split pipe, the control component being used to control the gas flow rate from the intake pipe to the corresponding split pipe;

[0017] The control component and the main body are located on the same side of the air outlet pipe.

[0018] In one embodiment of this application, two adjacent main bodies are integrally connected;

[0019] And / or, the ejector device and the gas distribution rod body are an integral structure.

[0020] In one embodiment of this application, the gas passage is arranged around the outer periphery of the ejector channel, and the peripheral wall of the ejector channel is provided with at least one gas inlet.

[0021] The gas passage is provided with a gas inlet that communicates with the gas connection pipe. The gas inlet and the gas inlet are respectively located on both sides of the gas passage in the axial direction, wherein the gas inlet is located close to the gas inlet end.

[0022] In one embodiment of this application, the ejector channel includes an air inlet section, a mixing section, and a connecting section connected sequentially from the air inlet end to the air outlet end, wherein the inlet end of the air inlet section is formed as the air inlet end, and the outlet end of the connecting section is formed as the air outlet end.

[0023] The cross-sectional area of ​​the ejector channel changes at the connection between the intake section and the mixing section, and the gas inlet is located at the connection between the intake section and the mixing section.

[0024] In one embodiment of this application, the cross-sectional area of ​​the mixing section gradually decreases from the intake section to the connecting section.

[0025] In one embodiment of this application, the cross-sectional area of ​​the connecting section remains unchanged and is consistent with the cross-sectional area of ​​the outlet end of the mixing section.

[0026] In one embodiment of this application, the cross-sectional area of ​​the mixing section increases abruptly relative to the cross-sectional area of ​​the intake section.

[0027] In one embodiment of this application, the cross-sectional area of ​​the mixing section remains unchanged from the air intake section to the connecting section;

[0028] The cross-sectional area of ​​the connecting section gradually decreases in the direction away from the mixing section.

[0029] To achieve the above objectives, this application also provides a gas appliance, including a burner and the aforementioned gas distribution rod assembly, wherein the burner includes a plurality of burner bars, and the plurality of gas outlets are respectively connected to the gas inlets of the plurality of burner bars.

[0030] In the gas distributor assembly of this invention, at least two ejector devices are correspondingly provided at at least two gas outlets on the gas distributor body. Each ejector device has an ejector channel and a gas channel. The inlet end of the gas channel is connected to the corresponding gas outlet, allowing the gas after being diverted by the gas distributor body to flow into the gas channel. By inputting air from the inlet end of the ejector channel, the air flowing towards the outlet end of the ejector channel will generate a negative pressure at the gas inlet, creating a suction force on the gas in the gas channel, thus ejecting the gas in the gas channel from the gas inlet into the ejector channel to mix with the air. The gas-air mixture mixed in the ejector channel can be ejected from the outlet end to enter the subsequent burner for further mixing. This extends the path of air-gas mixing, making the gas-air mixture more complete, enabling complete combustion, and reducing nitrogen oxide emissions. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the gas distribution bar assembly of the present invention;

[0033] Figure 2 This is a side view of the gas distribution bar assembly of the present invention;

[0034] Figure 3 for Figure 2 A cross-sectional view at point AA in the embodiment;

[0035] Figure 4 This is a schematic diagram of an embodiment of the ejector device in this invention;

[0036] Figure 5 for Figure 4 Full sectional view of the embodiment;

[0037] Figure 6 This is a schematic diagram of another embodiment of the ejector device in this invention;

[0038] Figure 7 for Figure 6 Full sectional view of the embodiment;

[0039] Figure 8 for Figure 7 A magnified view of a section at point M;

[0040] Figure 9 This is a schematic diagram of the assembly of the gas separator assembly and the burner in an embodiment of the present invention;

[0041] Figure 10 This is an exploded schematic diagram of the gas distribution rod assembly and the burner in an embodiment of the present invention.

[0042] Explanation of icon numbers:

[0043]

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0047] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0048] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0049] In related technologies, a gas nozzle is installed at the outlet of the gas distributor. The gas nozzle injects gas into the air inlet of the burner to draw in surrounding air for mixing. In this method, the gas distributor only injects gas, and the gas nozzle injects gas in a straight line at a single point in the middle to draw in surrounding air. This may result in insufficient drawn air and uneven gas-air mixing, leading to incomplete combustion and the production of more carbon monoxide and nitrogen oxides.

[0050] To address this, the present invention proposes a gas distributor assembly designed to spray a mixture of fuel gas and air, ensuring that the air and fuel gas mix before entering the burner. This extends the mixing path of the air and fuel gas, improves the uniformity of the mixture, and promotes complete combustion in the burner, thereby reducing nitrogen oxide emissions. The specific structure of the gas distributor assembly will be described below with reference to embodiments.

[0051] like Figures 1 to 5 As shown, the gas distribution rod assembly includes a gas distribution rod body 200 and at least two ejector devices 100.

[0052] The gas distributor body 200 is provided with at least two gas outlets 201; at least two ejector devices 100 are installed at the at least two gas outlets 201 respectively. The ejector device 100 is provided with an ejector channel 11 and a gas channel 12. The inlet end of the gas channel 12 is connected to the gas outlet 201. The ejector channel 11 is provided with an air inlet end 11a, an air outlet end 11b and a gas inlet 101. The air inlet end 11a is used to input air. The gas inlet 101 is connected to the gas channel 12. The air outlet end 11b is used to output a gas-air mixture.

[0053] In this embodiment, the inlet pipe 210 of the gas distributor body 200 is used to communicate with the gas source, so that the gas can be diverted through the gas distributor body 200 and flow out from at least two outlets 201. By providing at least two ejector devices 100 at the at least two outlets 201, that is, providing one ejector device 100 at each outlet 201, the ejector device 100 has an ejection channel 11 and a gas channel 12. The inlet end of the gas channel 12 is connected to the outlet 201, so that the gas flowing out after being diverted from the gas distributor body 200 can enter the corresponding gas channel 12. Air is input from the inlet 11a of the ejector channel 11. When the air flows toward the outlet 11b of the ejector channel 11, a negative pressure is generated at the gas inlet 101, which creates a suction force on the gas in the gas channel 12. This draws the gas in the gas channel 12 from the gas inlet 101 into the ejector channel 11 to mix with the air. The gas-air mixture that has been initially mixed in the ejector channel 11 can be ejected from the outlet 11b to enter the burner 300 for further mixing. This prolongs the path of air-gas mixing, making the gas-air mixture more complete, enabling complete combustion and reducing nitrogen oxide emissions.

[0054] It should be noted that in this embodiment, at least two ejector devices 100 are installed at at least two gas outlets 201. The gas is then split in the gas distributor body 200 before entering the corresponding ejector device 100 to mix with air. Compared with the related technology, which sets a premixing chamber inside the gas distributor body 200 to mix the gas and air before splitting it out, the gas flow distribution in this embodiment is more controllable and the air-fuel ratio is more accurately controlled, thus making the combustion more complete.

[0055] In the ejector device 100, the ejector channel 11 refers to the structure used to guide air flow and mix gas. Its inlet end 11a is used to input air, and its outlet end 11b is used to output the gas-air mixture. Specifically, it can be implemented using a tubular structure with varying or equal diameters, promoting the mixing of gas and air through an axial flow path. Optionally, the ejector device 100 is made of metal material, with the internally machined to form a cylindrical ejector channel 11. The gas channel 12 refers to the channel in the ejector device 100 used to transport gas. The inlet end of the gas channel 12 is connected to the outlet 201, which can be a direct connection or an indirect connection through a gas connection pipe 20. The gas channel 12 can be implemented using an annular cavity or a separate pipe structure. Optionally, the gas channel 12 achieves physical isolation between gas and air through an external method. Optionally, it can be a single annular gas channel 12 connecting all gas inlets 101, or it can be multiple independent gas channels 12 each connecting to their respective gas inlets 101. The gas inlet 101 refers to an opening or through-hole structure provided on the inner wall of the injection channel 11, which is used to introduce gas from the gas channel 12 into the injection channel 11. Specifically, it can be implemented by multiple independent holes or continuous annular holes.

[0056] In practical applications, the ejector device 100 and the gas distribution rod body 200 can be connected by structural assembly methods, such as screw fixing, snap-fit ​​fixing, or plug-in fixing. Alternatively, the ejector device 100 and the gas distribution rod body 200 can be an integral structure, such as being formed by an integral mold.

[0057] In summary, in the gas distribution rod assembly of the present invention, at least two ejector devices 100 are correspondingly provided at at least two gas outlets 201 of the gas distribution rod body 200. Each ejector device 100 has an ejector channel 11 and a gas channel 12. The inlet end of the gas channel 12 is connected to the corresponding gas outlet 201, so that the gas after being diverted by the gas distribution rod body 200 can flow into the gas channel 12. When air is input from the inlet end 11a of the ejector channel 11, the air flowing towards the outlet end 11b of the ejector channel 11 will generate a negative pressure at the gas inlet 101, forming a suction force on the gas in the gas channel 12, and ejecting the gas in the gas channel 12 from the gas inlet 101 into the ejector channel 11 to mix with the air. The gas-air mixture mixed in the ejector channel 11 can be ejected from the outlet end 11b to enter the subsequent burner 300 for further mixing. Thus, the path of air and gas mixing is extended, making the gas and air mix more fully, enabling complete combustion and reducing nitrogen oxide emissions.

[0058] Please see Figures 1 to 5In one embodiment of this application, the ejector device 100 includes a main body 10 and a gas connection pipe 20. The main body 10 and the gas distribution rod body 200 are spaced apart. The ejector channel 11 and the gas channel 12 are both located on the main body 10. One end of the gas connection pipe 20 is connected to the gas distribution rod body 200 and communicates with the gas outlet 201. The other end of the gas connection pipe 20 is connected to the main body 10 and communicates with the gas channel 12.

[0059] In this embodiment, the inlet end of the gas passage 12 is connected to the outlet 201 of the gas distributor body 200 via a gas connecting pipe 20. The gas connecting pipe 20 serves two purposes: firstly, it facilitates gas flow; secondly, it supports the mounting body 10 and the gas distributor body 200. Understandably, the body 10 is spaced from the gas distributor body 200 by the support of the gas connecting pipe 20, thus separating the ejector channel 11 from the gas distributor body 200. This ensures sufficient cavity clearance around the inlet end 11a of the ejector channel 11, preventing obstruction by the gas distributor body 200, thereby reducing air intake resistance and ensuring sufficient air intake volume.

[0060] Please see Figures 1 to 3 In one embodiment of this application, the gas distribution rod body 200 includes an inlet pipe 210, at least two branch pipes 220, and an outlet pipe 230. The at least two branch pipes 220 are connected to the inlet pipe 210. The outlet pipe 230 is provided with at least two mutually isolated outlet chambers 202, each outlet chamber 202 being connected to a branch pipe 220. Each outlet chamber 202 is provided with a plurality of outlets 201, and each outlet 201 is connected to a gas connection pipe 20. The plurality of gas connection pipes 20 are arranged at intervals along the extension direction of the outlet pipe 230, and the extension direction of the ejector channel 11 is set at an angle to the extension direction of the outlet pipe 230.

[0061] This embodiment illustrates the structure of the gas distribution rod body 200. The gas outlet pipe 230 is a long, narrow tube structure. Two adjacent gas outlet chambers 202 can be separated within the gas outlet pipe 230 by a partition or baffle. Each gas outlet chamber 202 is provided with several gas outlets 201. It can be understood that the number of gas outlets 201 in different gas outlet chambers 202 can be the same or different. The gas inlet pipe 210 is used to connect to the gas source. The airflow is split from the gas inlet pipe 210 into at least two split pipes 220, then enters the corresponding gas outlet chamber 202, and then flows into the ejector device 100 from the corresponding gas outlet 201. After mixing with the air, it is ejected from the gas outlet end 11b.

[0062] By arranging multiple gas connection pipes 20 at intervals along the extension direction of the gas outlet pipe 230, multiple main bodies 10 are arranged along the extension direction of the gas outlet pipe 230. On the one hand, this makes the structural layout of multiple ejector devices 100 more regular and reduces the overall volume. On the other hand, when assembled with the burner 300, the gas outlet end 11b of multiple ejector devices 100 can correspond to the gas inlet of multiple burner rows (multiple burner rows arranged side by side) of the burner 300.

[0063] The extension direction of the ejector channel 11 is set at an angle to the extension direction of the outlet pipe 230. This ensures that neither the inlet end 11a nor the outlet end 11b of the ejector channel 11 is obstructed by the outlet pipe 230, guaranteeing the flow rate and velocity of the ejector gas. Optionally, the extension direction of the ejector channel 11 is perpendicular to the extension direction of the outlet pipe 230. With this configuration, when assembled with the burner 300, the outlet ends 11b of multiple ejector devices 100 connect to the inlets of multiple burner rows, and the inlet ends 11a communicate with the cavity in the direction away from the burner rows, ensuring the intake volume. At the same time, the outlet pipe 230 extends along the arrangement direction of the multiple burner rows, which can reduce the overall volume of the burner 300 and the gas distribution rod assembly structure, reducing the space occupied in the gas equipment.

[0064] Please see Figures 1 to 3 In one embodiment of this application, two adjacent main bodies 10 are integrally connected.

[0065] Understandably, the main body 10 has an ejector channel 11 and a gas channel 12. To ensure sufficient ejector flow, the outer diameter of the main body 10 is larger than the outer diameter of the gas connection pipe 20, allowing multiple gas connection pipes 20 to be spaced apart along the extension direction of the outlet pipe 230, reducing air resistance and ensuring sufficient air intake. Connecting two adjacent main bodies 10 integrally allows for the installation of a sufficient number of ejector devices 100 on a given length of outlet pipe 230 to accommodate burners 300 with different loads. Furthermore, connecting two adjacent main bodies 10 integrally simplifies the manufacturing process and improves production efficiency.

[0066] Please see Figures 1 to 3 In one embodiment of this application, the gas splitter body 200 further includes a control component 240 installed between the intake pipe 210 and the split pipe 220. The control component 240 is used to control the gas flow rate from the intake pipe 210 to the corresponding split pipe 220. The main body 10 is located on the side of the outlet pipe 230, and the control component 240 and the main body 10 are located on the same side of the outlet pipe 230.

[0067] In this embodiment, the control component 240 can be a solenoid valve, installed at the connection between the intake pipe 210 and the diverter pipe 220. The movement of the solenoid valve core opens or closes the passage between the intake pipe 210 and the diverter pipe 220, thereby achieving the function of diverting the gas flow. Optionally, the control component 240 can be a valve structure with one inlet and multiple outlets, where its inlet is connected to the intake pipe 210 and multiple outlets are connected to multiple diverter pipes 220 respectively; or, the control component 240 can be a valve structure with one inlet and one outlet, where one control component 240 is provided between each intake pipe 210 and each diverter pipe 220, and so on.

[0068] By positioning the main body 10 to the side of the gas outlet pipe 230, and with the control component 240 located on the same side of the gas outlet pipe 230, the control component 240 and the main body 10 have a certain overlap area in the height direction, which reduces the overall length and width of the gas distribution rod assembly. When assembled with the burner 300, the gas outlet end 11b of the main body 10 connects with the gas inlet of the burner. At this time, there is a gap between the gas distribution rod body 200 and the burner for the control component 240 to be installed. That is, the control component 240 is located below the main body 10, thereby making the overall internal layout of the gas equipment more compact.

[0069] Please see Figures 4 to 8 In one embodiment of this application, the gas passage 12 is arranged around the outer periphery of the ejector passage 11, and the peripheral wall of the ejector passage 11 is provided with at least one gas inlet 101; the gas passage 12 is provided with a gas inlet 102 communicating with the gas connecting pipe 20, and the gas inlet 102 and the gas inlet 101 are respectively provided on both sides of the gas passage 12 in the axial direction, wherein the gas inlet 101 is provided close to the gas inlet end 11a.

[0070] Understandably, the gas passage 12 can be configured as an annular cavity structure coaxial with the ejector passage 11. The inner wall of the annular cavity forms a sealed connection with the outer wall of the ejector passage 11. The gas inlet 101 penetrates the inner and outer walls of the ejector passage 11, so that the gas passage 12 is connected to the ejector passage 11.

[0071] The gas passage 12 surrounds the outer periphery of the ejector passage 11, so that the gas passage 12 covers the entire outer periphery of the ejector passage 11. The gas can rotate three-dimensionally and diffuse evenly to each circumferential position of the annular cavity within the gas passage 12, and be evenly delivered to multiple gas inlets 101 on the periphery of the ejector passage 11. This ensures that each gas inlet 101 can discharge gas into the ejector passage 11, avoiding the phenomenon of uneven mixing caused by local gas concentration.

[0072] By placing the gas inlet 102 and the gas inlet 101 on opposite sides of the gas passage 12 in the axial direction, the flow path of the gas within the gas passage 12 is extended, allowing the gas to circumferentially surround the ejector passage 11. The gas inlet 101 is positioned close to the air inlet end 11a, ensuring that the gas is introduced at the initial stage of air entering the ejector passage 11. This extends the mixing path and time of the gas and air within the ejector passage 11, allowing for sufficient diffusion and uniform mixing of the gas and air during the flow process.

[0073] Based on this, after the gas enters the gas passage 12 from the gas inlet 102, it can flow axially to the gas inlet 101 area, forming an airflow direction opposite to the airflow direction in the ejector channel 11, and then enter the ejector channel 11 from the gas inlet 101, which can further increase the turbulence between the gas and the air, making the two mix more evenly.

[0074] By having the gas inlet 101 at least partially surround the periphery of the ejector channel 11, compared to the method of gas being injected from the center in a single stream in related technologies, this embodiment allows the gas to enter the air from the circumference of the ejector channel 11, increasing the contact area between the gas and the air, and increasing the part of the gas entering the air, which can effectively improve the uniformity of gas-air mixing.

[0075] In practical applications, the shape and structure of the gas inlet 101 can be determined according to the actual situation.

[0076] Please see Figures 6 to 8 In one embodiment, the gas inlet 101 has a plurality of gas inlets 101, which are distributed at circumferential intervals along the ejector channel 11.

[0077] Understandably, the spaced distribution of multiple gas inlets 101 divides the gas into multiple independent airflows, which are injected into the ejector channel 11 at different angles, forming a more thorough and continuous contact with the air flowing within the ejector channel 11. This further improves the mixing efficiency and uniformity of the gas and air. This design avoids the problems of local gas accumulation or uneven distribution that may occur with a single gas inlet.

[0078] Optionally, the gas inlet 101 can be a circular hole, a square hole, a triangular hole, or some irregularly shaped hole.

[0079] Please see Figure 4 and Figure 5 In one embodiment, the gas inlet 101 is an annular hole surrounding the periphery of the ejector channel 11.

[0080] By setting the gas inlet 101 as an annular hole structure, the gas can be uniformly introduced into the ejector channel 11 along the entire annular cross section to mix with the air, thus eliminating the airflow gaps between local areas.

[0081] In addition, the gas is uniformly injected into the ejector channel 11 from the annular hole in the whole circumference, forming an annular contact surface with the axially flowing air. This achieves continuous mixing of gas and air in the circumferential dimension, increases the contact area between gas and air, and causes the air and gas to mix turbulently in the ejector channel 11, thereby improving the mixing uniformity.

[0082] In one embodiment, there are multiple gas inlets 101, which are spaced apart along the axial direction of the ejector channel 11. This design increases the ejector area for gas to enter the air, resulting in a more uniform mixture of gas and air.

[0083] Please see Figures 4 to 7 In one embodiment of this application, the ejector channel 11 includes an intake section 111, a mixing section 112, and a connecting section 114 connected sequentially from an intake end 11a to an outlet end 11b. The inlet end of the intake section 111 is formed as the intake end 11a, and the outlet end of the connecting section 114 is formed as the outlet end 11b. The flow cross-sectional area of ​​the ejector channel 11 changes at the connection between the intake section 111 and the mixing section 112, and the gas inlet 101 is located at the connection between the intake section 111 and the mixing section 112.

[0084] Understandably, the mixing section 112 is located downstream of the intake section 111. The cross-sectional area of ​​the ejector channel 11 changes at the connection between the intake section 111 and the mixing section 112. When the airflow flows from the intake section 111 to the mixing section 112, the airflow will become turbulent at the connection between the intake section 111 and the mixing section 112 because the cross-sectional area of ​​the mixing section 112 changes suddenly relative to the cross-sectional area of ​​the intake section 111. By setting the gas inlet 101 at the connection between the intake section 111 and the mixing section 112, the gas can be quickly mixed into the airflow at the connection when it enters the ejector channel 11, so that the gas and air are fully mixed.

[0085] It should be noted that in this embodiment, the cross-sectional area of ​​the ejector channel 11 changes at the connection between the intake section 111 and the mixing section 112. This can be understood as the cross-sectional area of ​​the mixing section 112 increasing or decreasing relative to the cross-sectional area of ​​the intake section 111. When it increases, the airflow will form a vortex at the point where the cross-sectional area changes, which can draw the fuel gas into the vortex and improve the uniformity of the fuel-air mixture. When it decreases, the airflow velocity at the point where the cross-sectional area changes will increase, resulting in a greater negative pressure and a stronger ejector force on the fuel gas, allowing more fuel gas to mix into the air and thus improving the fuel-air mixture.

[0086] The following will illustrate an implementation method in which the cross-sectional area of ​​the mixing section 112 is reduced or increased relative to the cross-sectional area of ​​the intake section 111.

[0087] Please see Figure 6 and Figure 7 In one embodiment, the cross-sectional area of ​​the mixing section 112 gradually decreases along the direction from the inlet end 11a to the outlet end 11b. In this embodiment, the cross-sectional area of ​​the mixing section 112 is smaller than that of the inlet section 111, making the inner wall of the mixing section 112 have a conical contraction structure. As the air flows through the ejector channel 11, the gradually decreasing cross-sectional area causes the fluid velocity to increase steadily, forming a stable negative pressure region in the mixing section 112. This allows the fuel gas to be efficiently drawn into the ejector channel 11, while simultaneously accelerating the laminar mixing of the flowing air and the fuel gas.

[0088] Furthermore, in the direction from the mixing section 112 to the outlet end 11b, the cross-sectional area of ​​the connecting section 114 remains unchanged and is consistent with the cross-sectional area at the outlet end of the mixing section 112. It is understood that as the cross-sectional area of ​​the mixing section 112 gradually decreases, the airflow velocity in the mixing section 112 gradually increases. By providing the connecting section 114 at the outlet end of the mixing section 112, and ensuring that the cross-sectional area of ​​the connecting section 114 is consistent with that at the outlet end of the mixing section 112, a smooth connection is achieved. Therefore, when the gas-air mixture flows from the mixing section 112 to the connecting section 114, the mixed airflow can smoothly enter the connecting section 114. The constant cross-sectional area of ​​the connecting section 114 effectively buffers the mixed airflow, preventing uneven mixing due to excessive airflow velocity. Furthermore, the connecting section 114 maintains fluid flow stability, preventing pressure fluctuations or energy loss caused by sudden changes in cross-sectional area. In addition, the connecting section 114 can extend the mixing contact time of air and gas, effectively improving the uniformity of gas-air mixing.

[0089] Please see Figure 4 and Figure 5 In one embodiment, the cross-sectional area of ​​the mixing section 112 increases abruptly relative to the cross-sectional area of ​​the intake section 111. In this embodiment, when the airflow flows from the intake section 111 to the mixing section 112, due to the sudden increase in the cross-sectional area of ​​the mixing section 112, a vortex is formed at the point of abrupt change in cross-sectional area. This allows the fuel gas to be directly drawn into the vortex and mixed with the air when entering the mixing section 112, resulting in more thorough mixing of the fuel gas and air. Simultaneously, it reduces the airflow velocity, prolongs the mixing contact time between the fuel gas and air in the mixing section 112, and further improves the mixing uniformity. Specifically, a step 113 is formed at the connection between the intake section 111 and the mixing section 112, and the fuel gas inlet 101 is located at the step 113.

[0090] Furthermore, along the direction from the inlet end 11a to the outlet end 11b, the cross-sectional area of ​​the mixing section 112 remains constant; the cross-sectional area of ​​the connecting section 114 gradually decreases in the direction away from the mixing section 112. The airflow forms a vortex at the connection between the inlet section 111 and the mixing section 112, allowing for thorough mixing of the fuel gas and air. Furthermore, by keeping the cross-sectional area of ​​the mixing section 112 constant, the stability of the air-fuel mixture flow can be maintained, preventing pressure fluctuations or energy loss due to changes in the cross-sectional area within the mixing section 112. Since the cross-sectional area of ​​the mixing section 112 is larger than that of the inlet section 111, the airflow velocity within the mixing section 112 decreases, and the mixing contact time between the air and fuel gas is prolonged, effectively improving the uniformity of the fuel gas-air mixture. Based on the reduced airflow velocity and uniform mixing, this embodiment provides a connecting section 114 at the outlet end of the mixing section 112. The connecting section 114 is gradually narrowed in the direction away from the mixing section 112, that is, the flow cross-sectional area of ​​the connecting section 114 gradually decreases in the direction towards the outlet end 11b. This can increase the flow velocity of the air-fuel mixture in the connecting section 114, so as to ensure the airflow intensity when the air-fuel mixture is injected into the burner from the outlet end 11b.

[0091] The present invention also proposes a gas-fired device, such as... Figure 9 and Figure 10 The gas equipment includes a burner 300 and a gas distribution rod assembly. The specific structure of the gas distribution rod assembly is as described in the above embodiments. Since this gas equipment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The burner 300 includes multiple burners, and multiple gas outlets 11b are respectively connected to the gas inlets of the multiple burners.

[0092] Alternatively, the gas-fired equipment can be a gas water heater, a gas-fired wall-hung boiler, a boiler, etc.

[0093] Alternatively, the gas equipment can be a forced-draft gas equipment or a forced-extraction gas equipment.

[0094] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A gas distribution rod assembly, characterized in that, It includes a gas distribution rod body and at least two ejector devices. The gas distribution rod body is provided with at least two gas outlets. The at least two ejector devices are installed at the at least two gas outlets respectively. The ejector device is provided with an ejector channel and a gas channel. The inlet end of the gas channel is connected to the gas outlet. The ejector channel is provided with an air inlet, an air outlet, and a gas inlet. The air inlet is used to input air, and the gas inlet is connected to the gas channel. The gas inlet is located on the peripheral wall of the ejector channel. The air entering from the air inlet will eject the gas from the gas inlet into the ejector channel. The air outlet is used to output the gas-air mixture. The ejector device includes a main body and a gas connection pipe. The ejector channel and the gas channel are both located in the main body. One end of the gas connection pipe is connected to the gas distribution rod body and communicates with the gas outlet. The other end is connected to the main body and communicates with the gas channel. The gas distribution rod body includes a gas outlet pipe, which has multiple gas outlets, each of which is connected to a gas connection pipe. The main body is spaced apart from the gas outlet pipe via the gas connection pipe. The outer diameter of the main body is larger than that of the gas connection pipe. The multiple gas connection pipes are spaced apart along the extension direction of the gas outlet pipe. Adjacent main bodies are fixedly connected. The extension direction of the ejector channel is set at an angle to the extension direction of the gas outlet pipe. The ejector device and the gas distribution rod body are an integral structure.

2. The gas distributor assembly as described in claim 1, characterized in that, The air distribution bar body includes: Intake pipe; At least two branch pipes, both connected to the intake pipe; and The air outlet pipe is provided with at least two mutually isolated air outlet chambers, and each air outlet chamber is connected to one of the branch pipes; Each of the air outlet chambers is provided with a number of air outlets.

3. The gas distributor assembly as described in claim 2, characterized in that, The main body is located to the side of the air outlet pipe; The gas distribution rod body also includes a control component installed between the intake pipe and the split pipe, the control component being used to control the gas flow rate from the intake pipe to the corresponding split pipe; The control component and the main body are located on the same side of the air outlet pipe.

4. The gas distributor assembly as described in claim 1, characterized in that, The two adjacent main bodies are connected as a single unit.

5. The gas distributor assembly as described in any one of claims 1 to 4, characterized in that, The gas passage is arranged around the outer periphery of the ejector channel, and the peripheral wall of the ejector channel is provided with at least one gas inlet. The gas passage is provided with a gas inlet that communicates with the gas connection pipe. The gas inlet and the gas inlet are respectively located on both sides of the gas passage in the axial direction, wherein the gas inlet is located close to the gas inlet end.

6. The gas distributor assembly as described in any one of claims 1 to 4, characterized in that, The ejector channel includes an air intake section, a mixing section, and a connecting section connected sequentially from the air intake end to the air outlet end. The inlet end of the air intake section is formed as the air intake end, and the outlet end of the connecting section is formed as the air outlet end. The cross-sectional area of ​​the ejector channel changes at the connection between the intake section and the mixing section, and the gas inlet is located at the connection between the intake section and the mixing section.

7. The gas distributor assembly as described in claim 6, characterized in that, The cross-sectional area of ​​the mixing section gradually decreases from the intake section to the connecting section.

8. The gas distributor assembly as described in claim 7, characterized in that, The cross-sectional area of ​​the connecting section remains unchanged and is consistent with the cross-sectional area of ​​the outlet end of the mixing section.

9. The gas distributor assembly as described in claim 6, characterized in that, The cross-sectional area of ​​the mixing section increases abruptly relative to the cross-sectional area of ​​the intake section.

10. The gas distributor assembly as described in claim 9, characterized in that, The cross-sectional area of ​​the mixing section remains constant from the intake section to the connecting section; The cross-sectional area of ​​the connecting section gradually decreases in the direction away from the mixing section.

11. A gas-fired device, characterized in that, The invention includes a burner and a gas distribution bar assembly as described in any one of claims 1 to 10, wherein the burner includes a plurality of burner bars and the plurality of gas outlets are respectively connected to the gas inlets of the plurality of burner bars.

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