Gas distribution rod assembly and gas equipment

Abstract

The invention discloses a gas distribution rod assembly and gas equipment, and relates to the technical field of gas equipment. Wherein the gas distribution rod assembly comprises a gas distribution rod body and at least two injection devices, and the gas distribution rod body is provided with at least two gas outlets; the at least two injection devices are correspondingly mounted at the at least two gas outlets, each injection device is provided with an injection channel and a gas channel, and the inlet end of each gas channel is communicated with the corresponding gas outlet; the injection channel is provided with a gas inlet end, a gas outlet end and a gas introduction port, the gas inlet end is used for inputting air, the gas introduction port is communicated with the gas channel, and the gas outlet end is used for outputting a gas-air mixture. According to the technical scheme, the air and gas mixing path is prolonged, gas and air are mixed more sufficiently, sufficient combustion can be achieved, and emission of nitric oxide is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment, and particularly relates to a gas distribution rod assembly and a gas equipment. Background Art

[0002] The gas equipment realizes the diversion of gas through the gas distribution rod assembly to meet the different gas demands of the burner.

[0003] In the related art, a gas nozzle is arranged at the outlet of the gas distribution rod, and the gas nozzle is used to inject gas towards the air inlet of the burner to entrain the surrounding air into the burner for mixing. However, in this way, the gas nozzle usually injects gas in a single-point straight line in the middle to entrain the surrounding air, which may lead to insufficient entrained air and uneven mixing of gas and air, resulting in incomplete combustion and generating more carbon monoxide and nitrogen oxides. Summary of the Invention

[0004] The main object of the present invention is to propose a gas distribution rod assembly, aiming to improve the uniformity of gas and air mixing, enabling the burner to burn sufficiently and reducing the emission of nitrogen oxides.

[0005] To achieve the above object, the gas distribution rod assembly proposed by the present invention includes a gas distribution rod body and at least two ejector devices. The gas distribution rod body is provided with at least two air outlets; at least two ejector devices are correspondingly installed at the at least two air outlets. The ejector device is provided with an ejection channel and a gas channel, and the inlet end of the gas channel is communicated with the air outlet. The ejection channel is provided with an air inlet end, an air outlet end and a gas inlet for introducing gas. The air inlet end is used for inputting air. The gas inlet for introducing gas is communicated with the gas channel, and the air outlet end is used for outputting a gas-air mixture.

[0006] In an embodiment of the present application, the ejector device includes: a main body, which is arranged at an interval from the gas distribution rod body, and both the ejection channel and the gas channel are arranged in the main body; and a gas connecting pipe, one end of which is connected to the gas distribution rod body and communicated with the air outlet, and the other end is connected to the main body and communicated with the gas channel.

[0007] In an embodiment of the present application, the gas distribution rod body includes: an intake pipe; at least two shunt pipes, both of which are connected to the intake pipe; and an outlet pipe, which is provided with at least two mutually isolated air outlet cavities, and each air outlet cavity is communicated with one of the shunt pipes; Among them, a plurality of the gas outlets are respectively provided corresponding to each of the gas outlet cavities, and each of the gas outlets is correspondingly connected to a gas connection pipe; the plurality of gas connection pipes are arranged at intervals along the extending direction of the gas outlet pipe, and the extending direction of the injection channel is arranged at an angle with the extending direction of the gas outlet pipe.

[0008] In an embodiment of the present application, the main body is located on the side of the gas outlet pipe; The main body of the gas distribution rod further includes a control component installed between the gas inlet pipe and the shunt pipe, and the control component is used to control the gas flow rate flowing from the gas inlet pipe into the corresponding shunt pipe; Among them, the control component and the main body are located on the same side of the gas outlet pipe.

[0009] In an embodiment of the present application, two adjacent main bodies are integrally connected; And / or, the injection device and the main body of the gas distribution rod are of an integral structure.

[0010] In an embodiment of the present application, the gas channel is disposed around the outer periphery of the injection channel, and at least one gas injection inlet is provided on the peripheral wall of the injection channel; The gas channel is provided with a gas inlet communicated with the gas connection pipe, and the gas inlet and the gas injection inlet are respectively disposed on two sides of the gas channel in the axial direction, wherein the gas injection inlet is disposed close to the intake end.

[0011] In an embodiment of the present application, the injection channel includes an intake section, a mixing section, and a connection section that are sequentially connected from the intake end to the outlet end, the inlet end of the intake section forms the intake end, and the outlet end of the connection section forms the outlet end; The cross-sectional area of the flow passage of the injection channel changes at the connection between the intake section and the mixing section, and the gas injection inlet is disposed at the connection between the intake section and the mixing section.

[0012] In an embodiment of the present application, the cross-sectional area of the mixing section gradually decreases from the intake section to the connection section.

[0013] In an embodiment of the present application, the cross-sectional area of the connection section remains unchanged and is the same as the cross-sectional area at the outlet end of the mixing section.

[0014] In an embodiment of the present application, the cross-sectional area of the mixing section suddenly increases relative to the cross-sectional area of the intake section.

[0015] In an embodiment of the present application, the cross-sectional area of the mixing section remains unchanged from the intake section to the connection section; The cross-sectional area of the flow-through section gradually decreases in the direction away from the mixing section.

[0016] To achieve the above object, the present application further provides a gas device, including a burner and the above-mentioned gas distribution rod assembly. The burner includes a plurality of burner ports, and the plurality of outlet ends are respectively connected to the inlet ports of the plurality of burner ports.

[0017] In the gas distribution rod assembly of the technical solution of the present invention, at least two ejector devices are correspondingly arranged at at least two outlet ports of the gas distribution rod body. The ejector device has an ejection channel and a gas channel. The inlet end of the gas channel is communicated with the corresponding outlet port, so that the gas shunted by the gas distribution rod body can flow into the gas channel. By inputting air from the inlet end of the ejection channel, a negative pressure will be generated at the gas inlet when the air flows towards the outlet end of the ejection channel, forming a suction force on the gas in the gas channel, and ejecting the gas in the gas channel into the ejection channel from the gas inlet to be mixed with the air. The gas-air mixture after mixing in the ejection channel can be ejected from the outlet end to enter the subsequent burner for further mixing. Thus, the mixing path of air and gas is extended, the gas and air are more fully mixed, can be fully burned, and the emission of nitrogen oxides is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0019] Figure 1 Schematic structural diagram of an embodiment of the gas distribution rod assembly of the present invention; Figure 2 Side view of the gas distribution rod assembly of the present invention; Figure 3 For Figure 2 Cross-sectional view at A-A in the embodiment; Figure 4 Schematic structural diagram of an embodiment of the ejector device in the present invention; Figure 5 For Figure 4 Full cross-sectional view of the embodiment; Figure 6 Schematic structural diagram of another embodiment of the ejector device in the present invention; Figure 7 For Figure 6 Full cross-sectional view of the embodiment; Figure 8 For Figure 7 Partial enlarged view at M in Figure 9 This is the assembly schematic diagram of the gas distribution rod assembly and the burner in the implementation of the present invention; Figure 10 This is the explosion schematic diagram of the gas distribution rod assembly and the burner in the embodiment of the present invention.

[0020] Explanation of the reference numerals in the drawings:

[0021] The realization of the object of the present invention, its functional features and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then such directional indications will also change accordingly.

[0024] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes the scenario of A, or the scenario of B, or the scenario where A and B are satisfied simultaneously.

[0025] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0026] In the related art, a gas nozzle is provided at the outlet of the gas distribution rod, and the gas nozzle is used to inject gas towards the air inlet of the burner to entrain the surrounding air into the burner for mixing. The gas distribution rod in this way only ejects gas, and the gas is ejected in a single straight line at the middle point through the gas nozzle to entrain the surrounding air. There may be a situation where the entrained air is insufficient and the gas-air mixture is uneven, resulting in incomplete combustion and the generation of more carbon monoxide and nitrogen oxides.

[0027] Therefore, the present invention proposes a gas distribution rod assembly, aiming to enable the gas distribution rod assembly to eject a gas-air mixture, so that the air and gas are mixed before entering the burner, which can extend the mixing path of the air and gas, improve the mixing uniformity of the gas and air, enable the burner to burn sufficiently, and reduce the emission of nitrogen oxides. The specific structure of the gas distribution rod assembly will be described below by way of embodiments.

[0028] As Figures 1 to 5 shown, the gas distribution rod assembly includes a gas distribution rod body 200 and at least two ejector devices 100.

[0029] The gas distribution rod body 200 is provided with at least two air outlets 201; at least two ejector devices 100 are correspondingly installed at the at least two air outlets 201. 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 communicated with the air 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 for inputting air. The gas inlet 101 is communicated with the gas channel 12, and the air outlet end 11b is used for outputting a gas-air mixture.

[0030] In this embodiment, the inlet pipe 210 of the gas distribution rod body 200 is used to communicate with a gas source, so that the gas can flow out from at least two air outlets 201 after being split by the gas distribution rod body 200. By correspondingly arranging at least two ejector devices 100 at the at least two air outlets 201, that is, one ejector device 100 is provided at each air outlet 201. The ejector device 100 has an ejector channel 11 and a gas channel 12. The inlet end of the gas channel 12 is communicated with the air outlet 201, so that the gas flowing out after being split by the gas distribution rod body 200 can enter the corresponding gas channel 12. Air is input from the air inlet end 11a of the ejector channel 11. When the air flows towards the air outlet end 11b of the ejector channel 11, a negative pressure will be generated at the gas inlet 101, forming a suction force on the gas in the gas channel 12, so as to entrain the gas in the gas channel 12 into the ejector channel 11 from the gas inlet 101 for mixing with the air. The gas-air mixture preliminarily mixed in the ejector channel 11 can be ejected from the air outlet end 11b to enter the burner 300 for further mixing, extending the mixing path of the air and gas, making the gas and air mix more fully, enabling sufficient combustion, and reducing the emission of nitrogen oxides.

[0031] It should be noted that in this embodiment, at least two ejector devices 100 are correspondingly installed at at least two air outlet ports 201. Then, after the gas is divided in the gas distribution rod body 200, it enters the corresponding ejector device 100 to mix with air. Compared with the related art where a premixing chamber is provided inside the gas distribution rod body 200 to mix gas and air and then divided and flowed out, the controllability of the gas flow distribution in this embodiment is higher, and the control of the air-fuel ratio is more accurate, thus making the combustion more complete.

[0032] In the ejector device 100, the ejector passage 11 refers to a structure for guiding the flow of air and mixing gas. Its air inlet end 11a is used to input air, and its air outlet end 11b is used to output the gas-air mixture. Specifically, it can be implemented by using a variable-diameter or equal-diameter tubular structure, and the mixture of gas and air is promoted through the axial flow path. Optionally, the ejector device 100 is made of a metal material, and a cylindrical ejector passage 11 is machined inside. The gas passage 12 refers to the passage in the ejector device 100 for conveying gas. The inlet end of the gas passage 12 is communicated with the air outlet port 201, which can be directly communicated or indirectly communicated through a gas connection pipe 20. The gas passage 12 can be implemented by using an annular cavity or a separate pipe structure. Optionally, the gas passage 12 realizes the physical isolation of gas and air through an external arrangement. Optionally, it can be an annular gas passage 12 that communicates with all the gas inlet ports 101, or it can also be a gas passage 12 of multiple independent pipes that respectively communicate with the corresponding gas inlet ports 101. The gas inlet port 101 refers to an opening or through-hole structure provided on the inner wall of the ejector passage 11 for introducing gas from the gas passage 12 into the ejector passage 11, and it can be specifically implemented by using multiple independent holes or continuous annular holes.

[0033] In actual application, the ejector device 100 and the gas distribution rod body 200 can be connected by means of structural assembly, such as screw fixation, snap fixation, insertion fixation, etc. Or, the ejector device 100 and the gas distribution rod body 200 can be an integral structure, such as being integrally formed by a mold.

[0034] In summary, in the gas distribution rod assembly of the technical solution of the present invention, at least two ejector devices 100 are correspondingly arranged at at least two air outlet ports 201 of the gas distribution rod body 200. The ejector device 100 has an ejection channel 11 and a gas channel 12. The inlet end of the gas channel 12 is communicated with the corresponding air outlet port 201, so that the gas shunted by the gas distribution rod body 200 can flow into the gas channel 12; by inputting air from the air inlet end 11a of the ejection channel 11, when the air flows towards the air outlet end 11b of the ejection channel 11, a negative pressure will be generated at the gas inlet 101, forming a suction force on the gas in the gas channel 12, and sucking the gas in the gas channel 12 into the ejection channel 11 from the gas inlet 101 to be mixed with the air; the gas-air mixture after mixing in the ejection channel 11 can be ejected from the air outlet end 11b to enter the subsequent burner 300 for further mixing. Thus, the mixing path of the air and the gas is extended, the gas and the air are more fully mixed, can be fully burned, and the emission of nitrogen oxides is reduced.

[0035] Please refer to Figures 1 to 5 , in an embodiment of the present application, the ejector device 100 includes a main body 10 and a gas connection pipe 20. The main body 10 is arranged at an interval from the gas distribution rod body 200. The ejection channel 11 and the gas channel 12 are both arranged in the main body 10; one end of the gas connection pipe 20 is connected to the gas distribution rod body 200 and communicated with the air outlet port 201, and the other end of the gas connection pipe 20 is connected to the main body 10 and communicated with the gas channel 12.

[0036] In this embodiment, the inlet end of the gas channel 12 is communicated with the air outlet port 201 of the gas distribution rod body 200 through the gas connection pipe 20. On the one hand, the gas connection pipe 20 plays a role in guiding the flow of the gas, and on the other hand, it plays a role in supporting and installing the main body 10 and the gas distribution rod body 200. It can be understood that the main body 10 is spaced from the gas distribution rod body 200 through the supporting action of the gas connection pipe 20, so that the ejection channel 11 is spaced from the gas distribution rod body 200, so that there is enough cavity gap around the air inlet end 11a of the ejection channel 11 and will not be blocked by the gas distribution rod body 200, thereby being able to reduce the resistance during air intake and ensure the air intake volume.

[0037] Please refer to Figures 1 to 3, in an embodiment of the present application, the gas distribution rod body 200 includes an intake pipe 210, at least two shunt pipes 220, and an outlet pipe 230. At least two shunt pipes 220 are all connected to the intake pipe 210; the outlet pipe 230 is provided with at least two mutually isolated air outlet cavities 202, and each air outlet cavity 202 communicates with a shunt pipe 220; wherein, a number of air outlet openings 201 are correspondingly provided for each air outlet cavity 202, and a gas connection pipe 20 is correspondingly connected to each air outlet opening 201; a plurality of gas connection pipes 20 are arranged at intervals along the extending direction of the outlet pipe 230, and the extending direction of the ejector channel 11 is arranged at an angle with the extending direction of the outlet pipe 230.

[0038] This embodiment exemplifies the structure of the gas distribution rod body 200. The outlet pipe 230 has a long strip-shaped pipe structure. Adjacent two air outlet cavities 202 in the outlet pipe 230 can be separated by a partition plate or a baffle. A number of air outlet openings 201 are correspondingly provided for each air outlet cavity 202. It can be understood that the number of air outlet openings 201 of different air outlet cavities 202 can be the same or different. The intake pipe 210 is used to connect to a gas source. The air flow is shunted from the intake pipe 210 into at least two shunt pipes 220, then enters the corresponding air outlet cavity 202, and then flows into the ejector device 100 from the corresponding air outlet opening 201, mixes with air, and is ejected from the air outlet end 11b.

[0039] By arranging a plurality of gas connection pipes 20 at intervals along the extending direction of the outlet pipe 230, a plurality of main bodies 10 are arranged along the extending direction of the outlet pipe 230. On the one hand, the structural layout of a plurality of ejector devices 100 is more regular, and the overall volume can be reduced. On the other hand, when assembled with the burner 300, the air outlet ends 11b of a plurality of ejector devices 100 can correspond to the intake ports of a plurality of burner ports (a plurality of burner ports are arranged side by side).

[0040] The extending direction of the ejector channel 11 is arranged at an angle with the extending direction of the outlet pipe 230. In this way, neither the intake end 11a nor the air outlet end 11b of the ejector channel 11 is blocked by the outlet pipe 230, ensuring the flow rate and speed of the ejector air flow. Optionally, the extending direction of the ejector channel 11 is perpendicular to the extending direction of the outlet pipe 230. With this setting, when assembled with the burner 300, the air outlet ends 11b of a plurality of ejector devices 100 are docked with the intake ports of a plurality of burner ports, and the intake end 11a faces away from the burner ports and communicates with the cavity, ensuring the intake air volume; at the same time, the outlet pipe 230 extends along the arrangement direction of a plurality of burner ports, which can reduce the overall volume of the assembly structure of the burner 300 and the gas distribution rod assembly, and reduce the occupied space in the gas equipment.

[0041] Please refer to Figures 1 to 3 , in an embodiment of the present application, two adjacent main bodies 10 are integrally connected.

[0042] It is understandable that the main body 10 has an ejector passage 11 and a gas passage 12. To ensure sufficient ejector flow rate, the outer diameter of the main body 10 is larger than that of the gas connection pipe 20, so that a plurality of gas connection pipes 20 can be arranged at intervals along the extending direction of the outlet pipe 230, reducing air resistance and ensuring air intake. The adjacent two main bodies 10 are integrally connected, so that a sufficient number of ejector devices 100 can be arranged on the outlet pipe 230 of a certain length to adapt to burners 300 with different loads. In addition, by integrally connecting the adjacent two main bodies 10, the manufacturing process can be simplified and the production efficiency can be improved.

[0043] Please refer to Figures 1 to 3 , in an embodiment of the present application, the gas distribution rod body 200 further includes a control component 240 installed between the inlet pipe 210 and the shunt pipe 220. The control component 240 is used to control the gas flow rate flowing from the inlet pipe 210 into the corresponding shunt 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 on the same side of the outlet pipe 230.

[0044] In this embodiment, the control component 240 can be a solenoid valve, installed at the connection of the inlet pipe 210 and the shunt pipe 220. The on or off of the passage between the inlet pipe 210 and the shunt pipe 220 is realized by the movement of the valve core of the solenoid valve to achieve the shunting effect of the gas. Optionally, the control component 240 can be a one-inlet and multi-outlet valve structure. At this time, its inlet is connected to the inlet pipe 210, and multiple outlets are respectively connected to multiple shunt pipes 220; or, the control component 240 can be a one-inlet and one-outlet valve structure. At this time, a control component 240 is arranged between each inlet pipe 210 and the shunt pipe 220, and so on.

[0045] By arranging the main body 10 at the side position of the outlet pipe 230, and the control component 240 and the main body 10 are on the same side of the outlet pipe 230, a certain overlapping area in the height direction is formed between the control component 240 and the main body 10, which can reduce the overall length and width dimensions of the gas distribution rod assembly. When assembled with the burner 300, the gas outlet end 11b of the main body 10 is butted against the gas inlet of the burner grate. At this time, there is a gap between the gas distribution rod body 200 and the burner grate for installing the control component 240, that is, the control component 240 is correspondingly located below the main body 10, so that the overall layout inside the gas equipment is more compact.

[0046] Please refer to Figures 4 to 8, in an embodiment of the present application, the gas passage 12 is disposed around the outer periphery of the ejector passage 11, and at least one gas inlet 101 is provided on the peripheral wall of the ejector passage 11; the gas passage 12 is provided with a gas inlet 102 communicated with the gas connection pipe 20, and the gas inlet 102 and the gas inlet 101 are respectively disposed on both sides of the gas passage 12 in the axial direction, wherein the gas inlet 101 is disposed near the air inlet end 11a.

[0047] It can be understood that the gas passage 12 can be set as an annular cavity structure coaxial with the ejector passage 11, the inner wall surface of the annular cavity forms a sealed connection with the outer wall surface of the ejector passage 11, and the gas inlet 101 penetrates through the inner and outer wall surfaces of the ejector passage 11, so that the gas passage 12 is communicated with the ejector passage 11.

[0048] The gas passage 12 surrounds the outer periphery of the ejector passage 11, so that the gas passage 12 covers the entire outer peripheral area of the ejector passage 11. The gas in the gas passage 12 can be three-dimensionally rotated and uniformly diffused to each circumferential position of the annular cavity, and uniformly transported to a plurality of gas inlets 101 on the peripheral wall of the ejector passage 11, so that each gas inlet 101 can discharge gas into the ejector passage 11, avoiding the phenomenon of uneven mixing caused by local concentration of gas.

[0049] By respectively disposing the gas inlet 102 and the gas inlet 101 on both sides of the gas passage 12 in the axial direction, the flow path of the gas in the gas passage 12 is extended, so that the gas can be disposed circumferentially around the ejector passage 11. The gas inlet 101 is disposed near the air inlet end 11a, so that the gas is introduced at the initial stage when the air enters the ejector passage 11, and the mixing path and mixing time of the gas and the air in the ejector passage 11 are extended, so that the gas and the air are fully diffused and uniformly mixed during the flowing process.

[0050] On this basis, after the gas enters the gas passage 12 from the gas inlet 102, it can flow axially to the area of the gas inlet 101, forming an air flow direction opposite to the air flow direction in the ejector passage 11, and then enters the ejector passage 11 from the gas inlet 101, which can further increase the turbulent flow effect of the gas and the air, making the mixing of the two more uniform.

[0051] By surrounding at least part of the peripheral wall of the ejector passage 11 with the gas inlet 101, compared with the way of single-strand injection of gas in the middle in the related art, in this embodiment, the gas enters the air from the circumferential direction of the ejector passage 11, increasing the contact area between the gas and the air, and at the same time increasing the part where the gas enters the air, which can effectively improve the mixing uniformity of the gas and the air.

[0052] In actual application, the shape structure of the gas inlet 101 can be determined according to the actual situation.

[0053] Please refer to Figures 6 to 8 , in one embodiment, the gas inlet 101 has a plurality of gas inlets 101, and the plurality of gas inlets 101 are circumferentially spaced apart along the injection channel 11.

[0054] It can be understood that the spaced distribution of the plurality of gas inlets 101 divides the gas into multiple independent airflows, which are injected into the injection channel 11 at different angles, forming a more sufficient and continuous contact with the air flowing in the injection channel 11, and can further improve the mixing efficiency and mixing uniformity of the gas and air. Such a design avoids the problems of local gas accumulation or uneven distribution that may be caused by a single gas inlet.

[0055] Optionally, the gas inlet 101 can be a circular hole, a square hole, a triangular hole or some special-shaped holes, etc.

[0056] Please refer to Figure 4 and Figure 5 , in one embodiment, the gas inlet 101 is an annular hole surrounding the circumferential wall of the injection channel 11.

[0057] By setting the gas inlet 101 as an annular hole structure, the gas can be uniformly introduced into the injection channel 11 through the entire annular cross-section to mix with the air, eliminating the airflow blank area between local areas.

[0058] In addition, the gas is uniformly injected into the injection channel 11 from the entire circumference of the annular hole, forming an annular contact surface with the axially flowing air, realizing continuous mixing of the gas and air in the circumferential dimension, increasing the contact area between the gas and air, making the air and gas turbulently mix in the injection channel 11, and improving the mixing uniformity.

[0059] In one embodiment, the gas inlet 101 has a plurality of them, and the plurality of gas inlets 101 are axially spaced apart along the injection channel 11. Such a design can increase the injection area of the gas into the air, making the mixing of the gas and air more uniform.

[0060] Please refer to Figures 4 to 7 , in one embodiment of the present application, the injection channel 11 includes an intake section 111, a mixing section 112 and a connection section 114 that are sequentially connected from the intake end 11a to the outlet end 11b. The inlet end of the intake section 111 is formed as the intake end 11a, and the outlet end of the connection section 114 is formed as the outlet end 11b; the cross-sectional area of the injection channel 11 changes at the connection between the intake section 111 and the mixing section 112, and the gas inlet 101 is provided at the connection between the intake section 111 and the mixing section 112.

[0061] It can be understood that the mixing section 112 is located on the downstream side of the intake section 111. The cross-sectional area of the flow passage 11 of the ejector passage changes at the connection between the intake section 111 and the mixing section 112. When the air flow flows from the intake section 111 to the mixing section 112, since the cross-sectional area of the mixing section 112 suddenly changes relative to the cross-sectional area of the intake section 111, the air flow will be disordered at the connection between the intake section 111 and the mixing section 112. By arranging 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 air flow at this connection when it enters the ejector passage 11, so that the gas and air are fully mixed.

[0062] It should be noted that in this embodiment, the cross-sectional area of the flow passage 11 of the ejector passage changes at the connection between the intake section 111 and the mixing section 112. It can be understood that the cross-sectional area of the mixing section 112 increases or decreases relative to the cross-sectional area of the intake section 111. When it increases, a vortex will be formed in the air flow at the change of the cross-sectional area, which can suck the gas into the vortex and improve the gas-air mixing uniformity; when it decreases, the flow velocity of the air flow at the change of the cross-sectional area will increase, and the generated negative pressure will be greater, so the ejecting suction force on the gas is stronger, making more gas mix into the air, achieving the purpose of improving the gas-air mixing degree.

[0063] Next, the implementation manners in which the cross-sectional area of the mixing section 112 decreases or increases relative to the cross-sectional area of the intake section 111 will be illustrated by examples.

[0064] Please refer to Figure 6 and Figure 7 , in an embodiment, in the direction from the intake end 11a to the outlet end 11b, the cross-sectional area of the mixing section 112 gradually decreases. In this embodiment, the cross-sectional area of the mixing section 112 decreases relative to the cross-sectional area of the intake section 111, so that the inner wall of the mixing section 112 has a tapered contraction structure. During the process of the air flowing through the ejector passage 11, the gradually decreasing cross-sectional area makes the fluid flow velocity increase steadily, and a stable negative pressure region is formed in the mixing section 112, so that the gas is efficiently sucked into the ejector passage 11, and at the same time, the accelerating air and gas form a laminar flow mixture.

[0065] Further, in the direction from the self-mixing section 112 to the air 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 can be understood that the cross-sectional area of the mixing section 112 gradually decreases, so the air flow velocity in the mixing section 112 gradually increases. By providing the connecting section 114 at the outlet end of the mixing section 112, the cross-sectional area of the connecting section 114 is consistent with the cross-sectional area at the outlet end of the mixing section 112, making the connection between the two smooth. Then, when the mixed gas and air flow from the mixing section 112 to the connecting section 114, the mixed gas flow can smoothly enter the connecting section 114. The cross-sectional area of the connecting section 114 remains unchanged, which can effectively buffer the mixed gas flow, avoid uneven mixing due to too fast air flow velocity, and maintain the fluid flow stability in the connecting section 114, avoiding pressure fluctuations or energy losses caused by sudden changes in the cross-sectional area. In addition, the connecting section 114 can extend the mixing contact time of air and gas, effectively improving the mixing uniformity of gas and air.

[0066] Please refer to Figure 4 and Figure 5 , in an embodiment, the cross-sectional area of the mixing section 112 suddenly increases relative to the cross-sectional area of the intake section 111. In this embodiment, when the air flow 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 will be formed at the sudden change of the cross-sectional area, so that the gas can be directly sucked into the vortex and mixed with air when entering the mixing section 112, making the mixing of gas and air more sufficient. At the same time, the air flow velocity can be reduced, and the mixing contact time of gas and air in the mixing section 112 can be extended, further improving the mixing uniformity. Specifically, a step 113 is formed at the connection between the intake section 111 and the mixing section 112, and the gas inlet 101 is provided at the step 113.

[0067] Further, in the direction from the intake end 11a to the outlet end 11b, the cross-sectional area of the flow passage of the mixing section 112 remains unchanged; the cross-sectional area of the connecting section 114 gradually decreases in the direction away from the mixing section 112. A vortex is formed at the connection between the intake section 111 and the mixing section 112, enabling the gas and air to be fully mixed. On this basis, by setting the cross-sectional area of the flow passage of the mixing section 112 to be unchanged, the stability of the flow of the air-gas mixture can be maintained, and pressure fluctuations or energy losses caused by changes in the cross-sectional area of the flow passage in the mixing section 112 can be avoided. Since the cross-sectional area of the mixing section 112 is larger than that of the intake section 111, the flow velocity of the air flow in the mixing section 112 will decrease, and the mixing contact time between the air and the gas will be extended, effectively improving the mixing uniformity of the gas and the air. On the basis of the reduced flow velocity and uniform mixing of the air flow, in this embodiment, a connecting section 114 is provided at the outlet end of the mixing section 112. The connecting section 114 is tapered in the direction away from the mixing section 112, that is, the cross-sectional area of the connecting section 114 gradually decreases in the direction of the outlet end 11b, which can increase the flow velocity of the air-gas mixture in the connecting section 114 to ensure the air flow intensity when the air-gas mixture is injected into the burner from the outlet end 11b.

[0068] The present invention also provides a gas device, such as Figure 9 and Figure 10 , which includes a burner 300 and a gas distribution rod assembly. The specific structure of the gas distribution rod assembly refers to the above embodiment. Since this gas device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the burner 300 includes a plurality of burners, and the plurality of outlet ends 11b are respectively connected to the intake ports of the plurality of burners.

[0069] Optionally, the gas device can be a gas water heater, a gas wall-mounted boiler, a boiler, etc.

[0070] Optionally, the gas device can be a forced-draft gas device or a forced-exhaust gas device.

[0071] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A gas dividing 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 air outlets; the at least two ejector devices are correspondingly installed at the at least two air outlets. The ejector device is provided with an ejection channel and a gas channel, and the inlet end of the gas channel is communicated with the air outlet; The ejection channel is provided with an inlet end, an outlet end and a gas inlet. The inlet end is used for inputting air. The gas inlet is communicated with the gas channel, and the outlet end is used for outputting a gas-air mixture.

2. The gas distribution rod assembly according to claim 1, characterized in that, The ejector device includes: A main body, which is arranged at an interval from the gas distribution rod body. Both the ejection channel and the gas channel are arranged in the main body; and A gas connecting pipe, one end of which is connected to the gas distribution rod body and communicated with the air outlet, and the other end is connected to the main body and communicated with the gas channel.

3. The gas distribution rod assembly according to claim 2, characterized in that, The gas distribution rod body includes: An inlet pipe; At least two shunt pipes, all of which are connected to the inlet pipe; and An outlet pipe, which is provided with at least two mutually isolated air outlet cavities, and each air outlet cavity is communicated with one of the shunt pipes; Wherein, each air outlet cavity is correspondingly provided with a plurality of the air outlets, and each air outlet is correspondingly connected with one of the gas connecting pipes; a plurality of the gas connecting pipes are arranged at intervals along the extending direction of the outlet pipe, and the extending direction of the ejection channel is arranged at an angle with the extending direction of the outlet pipe.

4. The gas distributing rod assembly according to claim 3, characterized in that, The main body is located on the side of the outlet pipe; The gas distribution rod body further includes a control component installed between the inlet pipe and the shunt pipe. The control component is used for controlling the gas flow rate flowing from the inlet pipe into the corresponding shunt pipe; Wherein, the control component and the main body are located on the same side of the outlet pipe.

5. The gas distribution rod assembly according to claim 3, wherein, Two adjacent main bodies are integrally connected; And / or, the ejector device and the gas distribution rod body are of an integral structure.

6. The air distribution rod assembly according to any one of claims 2 to 5, characterized in that The gas channel is arranged around the outer periphery of the ejection channel, and at least one of the gas inlets is arranged on the peripheral wall of the ejection channel; The gas channel is provided with a gas inlet communicated with the gas connecting pipe. The gas inlet and the gas inlet are respectively arranged on both sides of the gas channel in the axial direction. Among them, the gas inlet is arranged close to the inlet end.

7. The gas distribution rod assembly according to any one of claims 1 to 5, characterized in that, The ejection channel includes an intake section, a mixing section and a connecting section which are sequentially connected from the inlet end to the outlet end. The inlet end of the intake section forms the inlet end, and the outlet end of the connecting section forms the outlet end; The cross-sectional area of the ejection channel changes at the connection between the intake section and the mixing section, and the gas inlet is arranged at the connection between the intake section and the mixing section.

8. The gas distribution rod assembly according to claim 7, characterized in that, The cross-sectional area of the mixing section gradually decreases from the intake section to the connecting section.

9. The air distribution rod assembly according to claim 8, wherein, The cross-sectional area of the connecting section remains unchanged and is consistent with the cross-sectional area at the outlet end of the mixing section.

10. The gas distribution rod assembly according to claim 7, characterized in that, The cross-sectional area of the mixing section suddenly increases relative to the cross-sectional area of the intake section.

11. The gas distribution rod assembly according to claim 10, wherein, The cross-sectional area of the mixing section remains unchanged 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.

12. A gas device, characterized in that, Comprising a burner and a gas distributing rod assembly as described in any one of claims 1 to 11, the burner includes a plurality of burner ports, and the plurality of gas outlet ends are respectively connected to the air inlet ports of the plurality of burner ports.

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