Fuel gas distributing pipe

Abstract

The invention belongs to the technical field of gas water heaters, and particularly relates to a gas distributing pipe. The gas distributing pipe comprises a gas distributing pipe body and a plurality of gas inlet channels integrally formed with the gas distributing pipe body, the gas inlet channels are parallel to one another and do not communicate with one another, a plurality of nozzle mounting holes are formed in the gas distributing pipe body, and the nozzle mounting holes are distributed in the gas distributing pipe body in multiple rows and communicate with the gas inlet channels. At least one air inlet channel is communicated with one nozzle mounting hole, and at least one air inlet channel is communicated with two nozzle mounting holes. The nozzle mounting holes in the gas distribution pipe can be controlled individually, gas supply and combustion of the single nozzle mounting hole are achieved, the minimum heat load is small, and the problem that the water heater is prone to overtemperature in summer or when the water amount is small is solved. And an air inlet channel communicating the two nozzle mounting holes can be controlled to be opened, and multi-flow-gradient air supply combustion is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of gas water heaters, and in particular relates to a gas distribution pipe. Background Art

[0002] CN221258844U discloses a gas distribution rod and a gas burner; the gas distribution rod includes a rod body, a gas channel is provided in the rod body, and a plurality of gas outlets are provided at intervals along the axial direction of the gas channel on the rod body, and the gas outlets are connected to the gas channel; the two ends of the rod body are detachably connected with a first connecting piece and a second connecting piece respectively; the rod body is provided with an air inlet connected to the gas channel, and the air inlet is detachably connected with an air inlet assembly. The two ends of the rod body are usually open, so the openings at both ends of the rod body are provided with tail plugs for blocking the gas channel inside the rod body, and the tail plugs seal the openings at both ends of the rod body through interference fit. Each gas outlet is provided with a nozzle, which is a copper part, and the nozzle is driven into the gas outlet of the rod body by automated equipment. The number of nozzles includes but is not limited to the following: eighteen equally spaced nozzles; twenty-two equally spaced nozzles; thirty-two equally spaced nozzles.

[0003] The use of a single row of nozzles arranged in the same direction increases the size of the gas distribution pipe or increases the internal cavity of the gas distribution pipe, which increases the manufacturing difficulty; the nozzles on the rod body form multiple flow gradients. Secondly, for example, if the above-mentioned eighteen nozzles are opened or closed at the same time, it is impossible to achieve arrangement and combination to form multiple gas supply flow rates, and the minimum heat load is large. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a gas distribution pipe on one hand, which includes a distribution pipe body and a plurality of air intake channels integrally formed with the distribution pipe body, wherein the plurality of air intake channels are parallel to each other and are not connected to each other, and the distribution pipe body is provided with a plurality of nozzle mounting holes, wherein the nozzle mounting holes are distributed in multiple rows on the distribution pipe body and are connected to the air intake channels, wherein at least one of the plurality of air intake channels is connected to two nozzle mounting holes.

[0005] Preferably, at least one of the multiple air inlet channels is connected to one nozzle mounting hole, and at least one air inlet channel is connected to two nozzle mounting holes. The air inlet channels include a first air inlet channel, a second air inlet channel, a third air inlet channel and a fourth air inlet channel that are parallel to each other and not connected to each other. The first air inlet channel is connected to two nozzle mounting holes, the second air inlet channel is connected to multiple nozzle mounting holes, and the third air inlet channel and the fourth air inlet channel are respectively connected to one nozzle mounting hole; the nozzle mounting holes are distributed in two rows.

[0006] Preferably, the gas distribution pipe body is provided with a first gas channel and a second gas channel extending along the length direction thereof, the first gas channel and the second gas channel are located at both ends of the gas distribution pipe body, and are separated by a partition in the middle, the first gas channel, the second gas channel, the gas distribution pipe body and the partition are integrally formed, the first air intake channel is connected with the nozzle mounting hole through the first gas channel, the second air intake channel is connected with the nozzle mounting hole through the second gas channel, the nozzle mounting holes of the third air intake channel and the fourth air intake channel are respectively arranged on both sides of the lateral direction of the partition, and the two nozzle mounting holes are not connected to each other.

[0007] Preferably, the outer ends of the first air inlet channel and the second air inlet channel respectively penetrate the air distribution pipe body to form ports, and the ports are fixedly covered with a first tail plug and a second tail plug.

[0008] Preferably, a connecting plate is further provided at the gas distribution pipe body corresponding to the partition, the gas distribution pipe body and the connecting plate are integrally formed, the first air intake channel, the second air intake channel, the third air intake channel and the fourth air intake channel all pass through the connecting plate, the external interfaces of the four are located on the connecting plate, the input ports of the four extend to the interior of the gas distribution pipe body and are connected with the nozzle mounting hole; the third air intake channel and the fourth air intake channel are both located in the middle of the connecting plate and correspond to the connecting plate, and the nozzle mounting holes of the two are located on the corresponding sides of the partition; the first air intake channel and the second air intake channel are respectively located at the two ends of the connecting plate in the length direction, and the two are also arranged corresponding to the first gas channel and the second gas channel.

[0009] Preferably, the two rows of nozzle mounting holes are arranged at equal intervals along the length and are located on the corresponding sides in the width direction of the air distribution pipe body, the air inlet channel is perpendicular to the plane where the nozzle mounting holes are located, the first air inlet channel is connected to two nozzle mounting holes and are respectively distributed on the two rows of nozzle mounting holes, the nozzle mounting holes of the third air inlet channel and the fourth air inlet channel are in the same length direction and are respectively distributed on the two rows of nozzle mounting holes, and the second air inlet channel is connected to at least four and are distributed in two rows.

[0010] Preferably, the acute angle formed by the air inlet passage and the length direction of the air distribution pipe body is α, and 50°≤α≤80°.

[0011] Preferably, the air intake channel includes a first air intake channel, a second air intake channel and a third air intake channel which are parallel to each other and not connected to each other; the first air intake channel is connected to two nozzle mounting holes, the second air intake channel is connected to multiple nozzle mounting holes, and the third air intake channel has two nozzle mounting holes; the nozzle mounting holes are distributed in two rows.

[0012] Preferably, the first air intake channel, the third air intake channel and the second air intake channel are on the same plane and are spaced from top to bottom, and the two nozzle mounting holes on the third air intake channel are connected through a third gas channel.

[0013] Preferably, the two nozzle mounting holes of the first air inlet channel are respectively arranged in two rows and are symmetrically arranged; the two nozzle mounting holes of the third air inlet channel are respectively arranged in two rows and are symmetrically arranged; the multiple nozzle mounting holes on the third air inlet channel are respectively arranged in two rows and are symmetrically arranged. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0015] Figure 1 A schematic diagram of the structure of a gas distribution pipe provided in an embodiment;

[0016] Figure 2 for Figure 1 AA section view in;

[0017] Figure 3 for Figure 1 BB section view in;

[0018] Figure 4 for Figure 2 CC section view in.

[0019] Figure 5 This is a schematic diagram of the structure of another gas distribution pipe provided for the embodiment, which is different from the above embodiment in that three gas inlet channels are provided;

[0020] Figure 6 for Figure 5 A top view of

[0021] Figure 7 for Figure 6 Middle DD section view.

[0022] Figure symbols: first air intake channel a1, first gas channel a2, first tail plug a4, second air intake channel b1, second gas channel b2, second tail plug b4, third air intake channel c1, third gas channel c2, fourth air intake channel d1, fourth nozzle mounting hole d3, gas distribution pipe body 10, connecting plate 11, partition 12.

[0023] a31 and a32 are first nozzle mounting holes.

[0024] b31, b32, b33, b34, b35, b36 are second nozzle mounting holes.

[0025] c3, c31, and c32 are the third nozzle mounting holes. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings.

[0027] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] Please refer to Figures 1 to 4 The present invention provides a gas distribution pipe, which includes a gas distribution pipe body 10 and a plurality of air intake channels integrally formed with the gas distribution pipe body 10. The plurality of air intake channels are parallel to each other and are not connected to each other. The gas distribution pipe body 10 is provided with a plurality of nozzle mounting holes, which are distributed in a plurality of rows on the gas distribution pipe body 10 and are connected to the air intake channels, wherein at least one air intake channel is connected to one nozzle mounting hole, and at least one air intake channel is connected to two nozzle mounting holes.

[0030] The nozzle mounting holes on the gas distribution pipe can be controlled individually to realize gas supply and combustion from a single nozzle mounting hole, with a small minimum heat load, thus avoiding the problem of overheating of the water heater in summer or when the water volume is small; secondly, the air intake channel connecting the two nozzle mounting holes can be controlled to open, to realize gas supply and combustion from the two nozzle mounting holes, or the two air intake channels connecting one nozzle mounting hole and two nozzle mounting holes can be opened at the same time to realize gas supply and combustion from the three nozzle mounting holes; of course, for use with multiple air intake channels, other air intake channels and their connected nozzle mounting holes can also be controlled to realize gas supply and combustion from a single gas distribution pipe according to multiple flow gradients, which can adapt to different needs.

[0031] In a preferred embodiment, the air intake channel includes a first air intake channel a1, a second air intake channel b1, a third air intake channel c1 and a fourth air intake channel d1 which are parallel to each other and not connected to each other. The first air intake channel a1 is connected to two nozzle mounting holes, the second air intake channel b1 is connected to multiple nozzle mounting holes, the third air intake channel c1 and the fourth air intake channel d1 are respectively connected to one nozzle mounting hole; the nozzle mounting holes are distributed in two rows.

[0032] By setting the above four air inlet channels and adapting the corresponding nozzle mounting holes, a richer gas combustion flow gradient can be obtained without increasing the difficulty of molding, making the product application scenarios more extensive and better matching the current combustion mode to achieve better energy-saving effects.

[0033] In a preferred embodiment, the gas distribution pipe body 10 is provided with a first gas channel a2 and a second gas channel b2 extending along the length direction thereof, the first gas channel a2 and the second gas channel b2 are located at both ends of the gas distribution pipe body 10, and are separated by a partition 12 in the middle, the first gas channel a2, the second gas channel b2, the gas distribution pipe body 10 and the partition 12 are integrally formed, the first air intake channel a1 is connected to the nozzle mounting hole through the first gas channel a2, the second air intake channel b1 is connected to the nozzle mounting hole through the second gas channel b2, the nozzle mounting holes of the third air intake channel c1 and the fourth air intake channel d1 are respectively arranged on both sides of the transverse direction of the partition 12, and the two nozzle mounting holes are not connected to each other.

[0034] The first gas channel a2, the second gas channel b2 and a partition 12 in the middle of the two are easier to form and demold. For example, in the molding method, as long as a certain distance is left between the two mold cores used to form the first gas channel a2 and the second gas channel b2, the partition 12 can be formed. The two mold cores can be demolded at both ends of the gas distribution pipe body 10 in the length direction to form the first gas channel a2, the second gas channel b2 and a partition 12.

[0035] In a preferred embodiment, the outer ends of the first air inlet channel a1 and the second air inlet channel b1 respectively penetrate the air distribution pipe body 10 to form ports, and the ports are fixedly covered with a first tail plug a4 and a second tail plug b4.

[0036] The port setting facilitates demoulding and molding, and the first air inlet channel a1 and the second air inlet channel b1 are kept sealed by the first tail plug a4 and the second tail plug b4 to facilitate sealing during use.

[0037] In a preferred embodiment, a connecting plate 11 is further provided at the gas distribution pipe body 10 corresponding to the partition 12, and the gas distribution pipe body 10 and the connecting plate 11 are integrally formed, and the first air intake channel a1, the second air intake channel b1, the third air intake channel c1 and the fourth air intake channel d1 all pass through the connecting plate 11, and the external interfaces of the four are located on the connecting plate 11, and the input ports of the four extend to the interior of the gas distribution pipe body 10 and are connected with the nozzle mounting hole; the third air intake channel c1 and the fourth air intake are both located in the middle of the connecting plate 11 and correspond to the connecting plate 11, and the nozzle mounting holes of the two are located on the corresponding sides of the partition 12; the first air intake channel a1 and the second air intake channel b1 are respectively located at the two ends of the connecting plate 11 in the length direction, and the two are also arranged corresponding to the first gas channel a2 and the second gas channel b2.

[0038] Please refer to Figure 4 , the first air inlet channel a1, the first gas channel and the nozzle mounting hole connected thereto are arranged at one end of the upper and lower ends of the gas distribution pipe body 10; the second air inlet channel b1, the second gas channel and the nozzle mounting hole connected thereto are arranged at the other end of the upper and lower ends of the gas distribution pipe body 10. The third air inlet channel c1 and the nozzle mounting hole connected thereto are located at one end of the left and right ends of the connecting plate 11; the fourth air inlet channel d1 and the nozzle mounting hole connected thereto are located at the other end of the left and right ends of the connecting plate 11. The above arrangement ensures that the four air inlet channels can be connected to the nozzle mounting hole or the gas channel in a straight-through manner. The connecting plate 11 is connected to other components of the gas stove to realize the installation and connection of the gas path, and the external interface is used to receive the input of the gas. The setting of the connecting plate 11 and the setting of the four air inlet channels on the same connecting plate 11 are convenient for installation and molding. The figure shows that four connecting holes are opened on the connecting plate 11 to connect and fix me. The gas pipe body, the connecting plate 11 and the four air inlet channels are integrally formed, which simplifies the molding steps, and the gas distribution pipe can be manufactured by molding in one time.

[0039] In a preferred embodiment, two rows of nozzle mounting holes are arranged at equal intervals along the length and are located on corresponding sides in the width direction of the air distribution pipe body 10. The air inlet channel is perpendicular to the plane where the nozzle mounting holes are located. The first air inlet channel a1 is connected to two nozzle mounting holes and are respectively distributed on the two rows of nozzle mounting holes. The nozzle mounting holes of the third air inlet channel c1 and the fourth air inlet channel d1 are in the same length direction and are respectively distributed on the two rows of nozzle mounting holes. The second air inlet channel b1 is connected to more than four nozzle mounting holes and are distributed in two rows.

[0040] The first air intake channel a1 connects two nozzle mounting holes as first nozzle mounting holes (a31, a32), the second air intake channel b1 connects six nozzle mounting holes as second nozzle mounting holes (b31, b32, b33, b34, b35, b36), and the nozzle mounting holes of the third air intake channel c1 and the fourth air intake channel d1 are distributed as third nozzle mounting holes c3 and fourth nozzle mounting holes d3.

[0041] In a preferred embodiment, the acute angle formed between the air inlet channel and the length direction of the air distribution pipe body 10 is α, 50°≤α≤80°. The above arrangement makes demoulding easier.

[0042] Please refer to Figures 5 to 7 The structure of another gas distribution pipe provided in the embodiment is different from that of the above embodiment in that three air inlet channels are provided.

[0043] In a preferred embodiment, the air intake channel includes a first air intake channel a1, a second air intake channel b1 and a third air intake channel c1 which are parallel to each other and not connected to each other; the first air intake channel a1 is connected to two nozzle mounting holes, that is, it is connected to two first nozzle mounting holes (a31, a32). The second air intake channel b1 is connected to multiple nozzle mounting holes. The third air intake channel c1 has two nozzle mounting holes, that is, it is connected to two third nozzle mounting holes (c31, c32); all nozzle mounting holes are distributed in two rows. When in use, the nozzle gas corresponding to two or four nozzle mounting holes can be controlled to open, two plus the number of nozzles installed on the second air intake channel b1, or all the nozzles, that is, four flow gradients are formed.

[0044] In a preferred embodiment, the first air inlet channel a1, the third air inlet channel c1 and the second air inlet channel b1 are arranged on the same plane and spaced from top to bottom, and the two nozzle mounting holes on the third air inlet channel c1 are connected through the third gas channel c2. The above arrangement is more conducive to the molding of the above air inlet channel and the molding and demoulding of the two nozzle mounting holes on the third air inlet channel c1 are more convenient.

[0045] In a preferred embodiment, the two nozzle mounting holes of the first air inlet channel a1 are arranged in two rows and are symmetrically arranged; the two nozzle mounting holes of the third air inlet channel c1 are arranged in two rows and are symmetrically arranged; the multiple nozzle mounting holes on the third air inlet channel c1 are arranged in two rows and are symmetrically arranged, which further reduces the difficulty of molding and is convenient for use and installation.

[0046] The nozzle mounting holes on the gas distribution pipe of the present invention are arranged relatively to each other, and a double-row nozzle layout is adopted; the first air inlet channel a1 is directly connected to the first nozzle mounting hole (a31, a32), and the gas on-off of the nozzle at the first nozzle mounting hole (a31, a32) is controlled; the second air inlet channel b1 is directly connected to the second nozzle mounting hole (b31, b32, b33, b34, b35, b36), and the gas on-off of the nozzle at the second nozzle mounting hole (b31, b32, b33, b34, b35, b36) is controlled. The third air inlet channel c1 is directly connected to the third nozzle mounting hole c3 to control the on-off of the gas of the nozzle at the third nozzle mounting hole c3; the fourth air inlet channel d1 is directly connected to the fourth nozzle mounting hole d3 to control the on-off of the gas of the nozzle at the fourth nozzle mounting hole d3; through the arrangement and combination of the above-mentioned four first air inlet channels a1 respectively controlling the on-off state of the gas of the nozzles at the mounting holes, a plurality of gas supply flow rates can be arranged and combined, such as one nozzle working, two nozzles working, three nozzles working and four nozzles working, etc.

[0047] The first gas channel a2 and the second gas channel b4 are covered with a first tail plug a4 and a second tail plug b4, and a partition 12 is provided to block the first gas channel a2 and the second gas channel b2, and the gas channel 2 from being connected to the atmosphere.

[0048] Generally, when the number and spacing of nozzles are the same, the length of the gas distribution pipe of the single-row nozzle structure is too long; the two-row nozzle structure on the same side has too many gas channels and sealing surfaces, which increases the risk of gas leakage. A gas channel controls a large number of nozzles, and it is impossible to achieve a single nozzle working state, the minimum heat load is high, and the water temperature is hot in summer; the existing gas distribution pipe has too many opening directions or requires secondary machining, which makes the manufacturing process complicated and the production cost high.

[0049] Compared with the prior art, the present invention has at least the following advantages:

[0050] The use of a single-row nozzle layout arranged in the same direction increases the size of the gas distribution pipe or increases the internal cavity of the gas distribution pipe, thereby increasing the manufacturing difficulty; the nozzles on the rod body cannot be controlled individually, and secondly, if, for example, the above-mentioned eighteen nozzles are opened or closed at the same time, it is impossible to realize gas supply and combustion from a single nozzle, and the minimum heat load is large. In summer or when the water volume is small, the water heater is prone to overheating; furthermore, it is impossible to realize that a single gas distribution rod supplies gas according to multiple flow gradients.

[0051] Can control the on and off of the gas in a single nozzle to achieve half-fire combustion;

[0052] Ensure that the water inlet temperature is high or the water flow is small in summer, and the water temperature is stable when low-level load is required;

[0053] The gas inlet channels of the gas distribution pipe are independent of each other and not interconnected, ensuring that the pressure of each gas channel will not change when the whole machine load is switched, ensuring combustion stability; the channels of the gas distribution pipe do not need to be processed again, reducing production costs;

[0054] The gas distribution pipe has fewer internal channel directions, which is convenient for production and manufacturing, and improves production efficiency;

[0055] The gas distribution pipe has fewer sealing surfaces, reducing the risk of gas leakage.

[0056] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A gas distribution pipe, characterized in that: The gas distribution pipe includes a distribution pipe body, and a plurality of air intake channels integrally formed with the distribution pipe body, wherein the plurality of air intake channels are parallel to each other and are not connected to each other, and a plurality of nozzle mounting holes are provided on the distribution pipe body, wherein the nozzle mounting holes are distributed in multiple rows on the distribution pipe body and are connected to the air intake channels, wherein at least one of the plurality of air intake channels is connected to two nozzle mounting holes.

2. The gas distribution pipe according to claim 1, characterized in that: At least one of the multiple inlet channels is connected to one nozzle mounting hole, and at least one inlet channel is connected to two nozzle mounting holes. The inlet channels include a first inlet channel, a second inlet channel, a third inlet channel and a fourth inlet channel that are parallel to each other and not connected to each other. The first inlet channel is connected to two nozzle mounting holes, the second inlet channel is connected to multiple nozzle mounting holes, and the third inlet channel and the fourth inlet channel are respectively connected to one nozzle mounting hole; the nozzle mounting holes are distributed in two rows.

3. The gas distribution pipe according to claim 2, characterized in that: The gas distribution pipe body is provided with a first gas channel and a second gas channel extending along the length direction thereof, the first gas channel and the second gas channel are located at both ends of the gas distribution pipe body, and are separated by a partition in the middle, the first gas channel, the second gas channel, the gas distribution pipe body and the partition are integrally formed, the first air intake channel is connected with the nozzle mounting hole through the first gas channel, the second air intake channel is connected with the nozzle mounting hole through the second gas channel, the nozzle mounting holes of the third air intake channel and the fourth air intake channel are respectively arranged on both sides of the transverse direction of the partition, and the two nozzle mounting holes are not connected with each other.

4. The gas distribution pipe according to claim 3, characterized in that: The outer ends of the first air inlet passage and the second air inlet passage respectively penetrate the air distribution pipe body to form ports, and the ports are fixedly covered with a first tail plug and a second tail plug.

5. The gas distribution pipe according to claim 3, characterized in that: A connecting plate is also provided at the gas distribution pipe body corresponding to the partition, and the gas distribution pipe body and the connecting plate are integrally formed, and the first air intake channel, the second air intake channel, the third air intake channel and the fourth air intake channel all pass through the connecting plate, and the external interfaces of the four are located on the connecting plate, and the input ports of the four extend to the interior of the gas distribution pipe body and are connected with the nozzle mounting hole; the third air intake channel and the fourth air intake channel are both located in the middle of the connecting plate and correspond to the connecting plate, and the nozzle mounting holes of the two are located on the corresponding sides of the partition; the first air intake channel and the second air intake channel are respectively located at the two ends of the connecting plate in the length direction, and the two are also arranged corresponding to the first gas channel and the second gas channel.

6. The gas distribution pipe according to claim 5, characterized in that: The two rows of nozzle mounting holes are arranged at equal intervals along the length and are located on the corresponding sides in the width direction of the air distribution pipe body. The air inlet channel is perpendicular to the plane where the nozzle mounting holes are located. The first air inlet channel is connected to two nozzle mounting holes and are respectively distributed on the two rows of nozzle mounting holes. The nozzle mounting holes of the third air inlet channel and the fourth air inlet channel are in the same length direction and are respectively distributed on the two rows of nozzle mounting holes. The second air inlet channel is connected to at least four and are distributed in two rows.

7. The gas distribution pipe according to claim 1, characterized in that: The acute angle formed between the air inlet passage and the length direction of the air distribution pipe body is α, 50°≤α≤80°.

8. The gas distribution pipe according to claim 1, characterized in that: The air intake channel includes a first air intake channel, a second air intake channel and a third air intake channel which are parallel to each other and not connected to each other; the first air intake channel is connected to two nozzle mounting holes, the second air intake channel is connected to multiple nozzle mounting holes, and the third air intake channel has two nozzle mounting holes; the nozzle mounting holes are distributed in two rows.

9. The gas distribution pipe according to claim 8, characterized in that: The first air intake channel, the third air intake channel and the second air intake channel are on the same plane and are spaced from top to bottom. The two nozzle mounting holes on the third air intake channel are connected through the third gas channel.

10. The gas distribution pipe according to claim 8, characterized in that: The two nozzle mounting holes of the first air inlet channel are respectively arranged in two rows and are symmetrically arranged; the two nozzle mounting holes of the third air inlet channel are respectively arranged in two rows and are symmetrically arranged; the multiple nozzle mounting holes on the third air inlet channel are respectively arranged in two rows and are symmetrically arranged.

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