Gas water heater and gas distribution rod assembly thereof

Abstract

The utility model relates to a gas water heater and a gas distributing rod assembly thereof, the gas distributing rod assembly comprises a gas distributing rod and a sealing cover, and a main gas channel, a normally-open cavity and a plurality of segmented cavities are formed in the gas distributing rod. The normally-open cavity is communicated with the main air channel, and a nozzle is arranged on the cavity wall of the normally-open cavity. The plurality of segmented cavities are respectively connected with the main air passage, each segmented cavity is respectively provided with a mounting port, and each segmented cavity is respectively provided with a nozzle; and sealing covers are arranged on the mounting ports of at least part of the segmented cavities. The main gas channel and the segmented cavity provided with the sealing cover are also in a normally open state, and gas entering the main gas channel can directly flow into the segmented cavity and then can be sprayed out through the nozzle on the cavity wall of the segmented cavity so as to be used for increasing gas supply during ignition or small load. Meanwhile, mold opening is not needed again, the mold opening cost is reduced, an external standby electromagnetic valve is not needed, and the cost of the gas distribution rod assembly is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas water heaters, in particular to a gas water heater and a gas distribution rod assembly thereof. BACKGROUND

[0002] The gas distribution rod assembly of a gas water heater is a core component of the gas water heater and is responsible for gas distribution. The gas distribution rod assembly is usually made by die casting, and its working principle is that gas passes through a main gas channel and enters into each segmented cavity, and then enters into each nozzle through each segmented cavity to distribute the gas source for the burner through each nozzle, and the opening and closing of each segmented cavity is controlled by a solenoid valve.

[0003] In the related art, the number of segmented cavities and nozzles of a gas distribution rod assembly is fixed, and each segmented cavity is formed by a die or is formed by post-processing. For a gas distribution rod assembly with a fixed number of nozzles and fixed segmented cavities, if the minimum load of the gas distribution rod assembly is to be improved, a new die needs to be opened, which has the problem of high cost. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a gas water heater and a gas distribution rod assembly thereof to solve the problem of high cost of re-opening a die when the minimum load of the gas distribution rod assembly needs to be improved.

[0005] A gas distribution rod assembly of a gas water heater, the gas distribution rod assembly comprising:

[0006] a gas distribution rod, the gas distribution rod being internally configured with a main gas channel, a normally open cavity, and a plurality of segmented cavities, the normally open cavity being in communication with the main gas channel, the normally open cavity being provided with a nozzle on a cavity wall thereof, the plurality of segmented cavities each being in communication with the main gas channel, each of the segmented cavities being provided with a mounting port, and each of the segmented cavities being provided with a nozzle on a cavity wall thereof; and

[0007] a sealing cover, the sealing cover being arranged on at least part of the mounting ports of the segmented cavities.

[0008] In one of the embodiments, the gas distribution rod assembly further comprises a solenoid valve, part of the mounting ports of the segmented cavities are provided with the sealing cover, and the remaining part of the mounting ports of the segmented cavities are provided with the solenoid valve, the solenoid valve being used to control the opening and closing of the corresponding segmented cavities and the main gas channel.

[0009] In one of the embodiments, the mounting port has a first face and a second face for forming a stepped structure, the sealing cover has an end face and a side face, the end face is in sealing connection with the first face, and the side face is used to be in sealing connection with the second face.

[0010] In one of the embodiments, a sealant is arranged between the side surface and the second surface; and / or, a sealant is arranged between the end surface and the first surface.

[0011] In one of the embodiments, the normally open cavity is arranged at one end of the main gas passage, the plurality of segmented cavities comprises a first segmented cavity and a second segmented cavity, the mounting port of the first segmented cavity is provided with the sealing cover, the mounting port of the second segmented cavity is provided with the electromagnetic valve, and the first segmented cavity and the second segmented cavity are respectively arranged at left and right sides of the normally open cavity.

[0012] In one of the embodiments, the plurality of segmented cavities further comprises a third segmented cavity, the third segmented cavity is arranged at a side of the second segmented cavity away from the normally open cavity, and the mounting port of the third segmented cavity is provided with the electromagnetic valve.

[0013] In one of the embodiments, the number of nozzles on the cavity walls of the first segmented cavity, the second segmented cavity and the third segmented cavity increases in sequence.

[0014] In one of the embodiments, the cross-sectional area of the normally open cavity gradually decreases along the direction of air intake in the main gas passage.

[0015] In one of the embodiments, the normally open cavity comprises a first side wall close to the first segmented cavity and a second side wall close to the second segmented cavity.

[0016] The extension direction of the first side wall is the same as the extension direction of the main gas passage, and the second side wall gradually inclines to the first side wall along the direction of air intake in the main gas passage.

[0017] A gas water heater comprises a gas distribution rod assembly.

[0018] The above gas water heater and the gas distribution rod assembly thereof, the normally open cavity is used for gas supply when ignition or small load, the sealing cover is arranged on the mounting port of part of the segmented cavities, the sealing cover replaces the original electromagnetic valve, so as to ensure the air tightness of the segmented cavity, so that the main gas passage and the segmented cavity provided with the sealing cover are also in direct communication, the gas entering into the main gas passage can directly flow into the segmented cavity, and then can be sprayed through the nozzles on the cavity wall of the segmented cavity, for increasing the gas supply when ignition or small load. That is, the sealing cover is arranged on the mounting port of part of the segmented cavities, so that part of the segmented cavities are changed from the adjustable cavity to the normally open cavity, the minimum load of the gas distribution rod assembly is increased, and the mold opening cost is reduced without re-opening the mold. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of the gas distribution rod assembly in one embodiment.

[0020] Figure 2 Figure 1 is a schematic view of a sectional structure of a gas distribution rod assembly according to an embodiment.

[0021] Figure 1 is a schematic view of a sectional structure of a gas distribution rod assembly according to an embodiment. DETAILED DESCRIPTION

[0022] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that similar improvements can be made by those skilled in the art in light of the foregoing description. Therefore, the present application is not limited to the following disclosed specific embodiments.

[0023] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0025] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "under" the second feature and the like, it means that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.

[0028] The gas distribution rod assembly of the gas water heater in the related art, the normally open cavity is directly communicated with the main gas channel, which is used when ignition or small load air inlet, and at this time, the nozzle on the segmented cavity wall is closed by the electromagnetic valve, and only the nozzle on the normally open cavity wall is inhaled. However, since the number of nozzles on the normally open cavity wall is a constant value, the amount of air intake is also a constant value, so when the amount of air intake for ignition or small load needs to be increased, the mold needs to be re-opened to increase the volume of the normally open cavity and the number of nozzles. The cost of re-opening the mold is high and the cycle is long, which increases the design cost.

[0029] Referring to Figure 1 and Figure 2The gas divider rod assembly of the gas water heater is provided in an embodiment of the present application, and comprises a gas divider rod and a sealing cover. The gas divider rod is internally configured with a main gas channel 100, a normally open cavity 200, and a plurality of segmented cavities 300. The normally open cavity 200 is in communication with the main gas channel 100, and a nozzle 400 is arranged on the cavity wall of the normally open cavity 200. Each segmented cavity 300 is connected with the main gas channel 100, and an installation opening 310 is arranged on the cavity wall of each segmented cavity 300. A nozzle 400 is arranged on the cavity wall of each segmented cavity 300. The installation opening 310 of at least part of the segmented cavities 300 is provided with a sealing cover 320, so that the segmented cavity 300 provided with the sealing cover 320 is always in communication with the main gas channel 100.

[0030] In the embodiment, the normally open cavity 200 is used for gas supply when ignition or small load. The installation opening 310 of part of the segmented cavities 300 is provided with a sealing cover 320, and the sealing cover 320 is used for plugging the installation opening 310 to ensure the airtightness of the segmented cavity 300, that is, the main gas channel 100 and the segmented cavity 300 provided with the sealing cover 320 are also in direct communication. The gas entering the main gas channel 100 can directly flow into the segmented cavity 300, and then be sprayed out through the nozzle 400 on the cavity wall of the segmented cavity 300, thereby increasing the gas supply when ignition or small load. That is, the sealing cover 320 is arranged on the installation opening 310 of part of the segmented cavities 300, so that the part of the segmented cavities 300 are changed from adjustable cavities to normally open cavities, thereby increasing the minimum load of the gas divider rod assembly, without the need to re-open the mold, thereby reducing the mold opening cost. At the same time, the use of the electromagnetic valve 330 is reduced, thereby reducing the cost.

[0031] Further, the gas divider rod assembly further comprises an electromagnetic valve 330. The installation opening 310 of part of the segmented cavities 300 is provided with a sealing cover 320, and the installation opening 310 of the remaining segmented cavities 300 is provided with an electromagnetic valve 330. The electromagnetic valve 330 is used for controlling the on-off of the corresponding segmented cavity 300.

[0032] In this way, the installation opening 310 of part of the remaining segmented cavities 300 is provided with an electromagnetic valve 330, and the electromagnetic valve 330 is used for controlling the on-off of the corresponding segmented cavity 300. When the normally open cavity 200 and the nozzle on the cavity wall of part of the segmented cavities 300 provided with the sealing cover 320 cannot meet the required load requirement, the electromagnetic valve 330 is needed to control the opening of the corresponding segmented cavity 300, so that the nozzle 400 on the cavity wall of the segmented cavity 300 can also supply gas, thereby achieving the effect of increasing the load.

[0033] Of course, in other special cases, the intake amount in the normally open state needs to be greatly increased, and a sealing cover 320 can also be arranged at the mounting port 310 of all the segmented cavities 300, that is, all the segmented cavities 300 are normally open cavities 200, and the gas in the main gas channel 100 can be directly sprayed out through all the nozzles 400. Without re-opening the mold, only the electromagnetic valve 330 at the mounting port 310 needs to be replaced with a sealing cover 320.

[0034] In an embodiment of the present application, the normally open cavity 200 is arranged at one end of the main gas channel 100, and the plurality of segmented cavities 300 include a first segmented cavity 301 and a second segmented cavity 302. The mounting port 310 of the first segmented cavity 301 is provided with a sealing cover 320, and the mounting port 310 of the second segmented cavity 302 is provided with an electromagnetic valve 330. The first segmented cavity 301 and the second segmented cavity 302 are respectively located on the left and right sides of the normally open cavity 200, wherein the left and right sides can be considered as two sides in relative positions.

[0035] In this way, the mounting port 310 of the first segmented cavity 301 is provided with a sealing cover 320, and the gas entering from the main gas channel 100 can directly enter the normally open cavity 200 and the first segmented cavity 301, respectively, so that the nozzles 400 on the cavity wall of the first segmented cavity 301 and the nozzles 400 on the cavity wall of the normally open cavity 200 are used together to supply gas when ignition or small load, so as to increase the minimum gas supply amount of the gas supply rod assembly. That is, without re-opening the mold, the number of nozzles 400 used at the initial ignition or small load can also be increased.

[0036] Further, the plurality of segmented cavities 300 further include a third segmented cavity 303. The third segmented cavity 303 is located on the side of the second segmented cavity 302 away from the normally open cavity 200, and the mounting port 310 of the third segmented cavity 303 is provided with an electromagnetic valve 330.

[0037] In this way, the gas enters the normally open cavity 200 and the segmented cavities 300 in sequence through the main gas channel 100. The first segmented cavity 301 and the second segmented cavity 302 are respectively located on the two sides in relative positions of the normally open cavity 200. The third segmented cavity 303 is located on the side of the second segmented cavity 302 away from the normally open cavity 200. That is, the gas in the main gas channel 100 first needs to pass through the second segmented cavity 302 to enter the third segmented cavity 303. Therefore, when the mounting port 310 of the second segmented cavity 302 is provided with an electromagnetic valve 330, the mounting port 310 of the third segmented cavity 303 is also provided with an electromagnetic valve 330. When the load needs to be increased, the electromagnetic valve 330 of the second segmented cavity 302 is first opened. If the load still needs to be increased, the electromagnetic valve 330 of the third segmented cavity 303 is then opened. If the second segmented cavity 302 can directly meet the load requirement, the third segmented cavity 303 does not need to be opened.

[0038] Specifically, the gas distribution rod assembly further comprises a gas distribution channel 110, which is perpendicular to the main gas channel 100, and the mounting ports 310 of the first sub-chamber 301, the second sub-chamber 302 and the third sub-chamber 303 are located on the gas distribution channel 110. The first sub-chamber 301, the normally open chamber 200, the second sub-chamber 302 and the third sub-chamber 303 are sequentially and spacedly arranged along the chamber passage, and the chamber passage is parallel to the gas distribution channel 110.

[0039] The first sub-chamber 301 is communicated with the gas distribution channel 110 through a first branch passage, the second sub-chamber 302 is communicated with the gas distribution channel 110 through a second branch passage, and the electromagnetic valve 330 on the second sub-chamber 302 is used to control the opening and closing of one end of the second branch passage connected to the gas distribution channel 110. The third sub-chamber 303 is communicated with the gas distribution channel 110 through a third branch passage, and the electromagnetic valve 330 on the third sub-chamber 303 is used to control the opening and closing of one end of the third branch passage connected to the gas distribution channel 110.

[0040] A nozzle 400 is arranged on the wall of the normally open chamber, and all the nozzles 400 are sequentially arranged along the extension direction of the chamber passage, and the distance between any two adjacent nozzles 400 is equal, so that the plurality of nozzles 400 can uniformly spray gas and improve the combustion efficiency.

[0041] In other embodiments, the mounting port 310 of the second sub-chamber 302 is provided with an electromagnetic valve 330, and the mounting port 310 of the third sub-chamber 303 is provided with a sealing cover 320, that is, the electromagnetic valve 330 of the second sub-chamber 302 is used to control the opening and closing of the second sub-chamber 302 and the third sub-chamber 303 at the same time. When the electromagnetic valve 330 of the second sub-chamber 302 is opened, the second sub-chamber 302 and the third sub-chamber 303 are simultaneously communicated with the main gas channel 100 to meet the demand of greatly improving the load.

[0042] In other embodiments, the mounting port 310 of the second sub-chamber is provided with a sealing cover 320, the mounting port 310 of the first sub-chamber is provided with an electromagnetic valve 330, and the mounting port 310 of the third sub-chamber is provided with an electromagnetic valve 330. The second sub-chamber 302 and the first sub-chamber 301 are respectively located on the opposite sides of the normally open chamber. That is, the second sub-chamber 302 is in a normally open state, which can also improve the minimum load of the gas distribution rod assembly.

[0043] In some embodiments of the present application, the number of nozzles 400 on the walls of the first sub-chamber 301, the second sub-chamber 302 and the third sub-chamber 303 increases in sequence. For example, the first sub-chamber 301 has one nozzle 400, the second sub-chamber 302 has two nozzles 400, and the third sub-chamber 303 has three nozzles 400. The mounting port 310 of the first sub-chamber 301 is provided with a sealing cover 320 for supplying gas at a minimum increase in ignition or small load.

[0044] When further increase in gas supply at ignition or small load is needed, the sealing cover 320 can be provided on the mounting port 310 of the second sub-chamber 302 for supplying gas at a larger increase in ignition or small load. Alternatively, the mounting port 310 of the first sub-chamber 301 and the mounting port 310 of the second sub-chamber 302 are both provided with a sealing cover 320 for further increasing the gas supply at ignition or small load.

[0045] For another example, the normally open chamber is provided with one nozzle 400, the first sub-chamber 301 has two nozzles 400, the second sub-chamber 302 has three nozzles 400, and the third sub-chamber 303 has four nozzles 400. Of course, the gas distribution rod assembly can further include a fourth sub-chamber, and the number of nozzles on the wall of the fourth sub-chamber is greater than that of the third sub-chamber.

[0046] Alternatively, the number of nozzles 400 on the wall of each sub-chamber 300 is the same.

[0047] Further, the third sub-chamber 303 has the largest number of nozzles on its wall, and the inner diameter of the third sub-chamber 303 is greater than that of the second sub-chamber 302 to accommodate more gas and ensure the supply of gas to all nozzles on the wall of the third sub-chamber 303.

[0048] Specifically, in the direction from the third sub-chamber 303 to the second sub-chamber 302, the inner diameter of the third sub-chamber 303 and the second sub-chamber 302 gradually decreases.

[0049] In some embodiments of the present application, the cross-sectional area of the normally open chamber 200 gradually decreases in the direction of the incoming air in the main air passage 100.

[0050] In this way, the normally open chamber 200 is arranged at one end of the main air passage 100. In order to reduce the resistance of the incoming air, the air inlet of the normally open chamber 200 has the same inner diameter as the main air passage 100, but the normally open chamber 200 is used for supplying gas at ignition or small load, and the amount of gas supplied is small. Therefore, the cross-sectional area of the normally open chamber 200 gradually decreases to further reduce the volume of the entire gas distribution rod assembly.

[0051] The cross-sectional area of the main air duct 100 gradually decreases along the air inlet direction in the main air duct 100, and the normally open cavity 200 is connected to the end of the main air duct 100 with the smallest cross-sectional area, so that the fuel gas flows smoothly into the normally open cavity 200, reduces the air flow resistance, and reduces the energy consumption.

[0052] Further, the normally open cavity 200 includes a first side wall 210 close to the first segmented cavity 301 and a second side wall 220 close to the second segmented cavity 302; the extension direction of the first side wall 210 is the same as the extension direction of the main air duct 100, and the second side wall 220 gradually inclines to the first side wall 210 along the air inlet direction in the main air duct 100.

[0053] In this way, the second side wall 220 gradually inclines to the first side wall 210, so that the second segmented cavity 302 can further extend to one end of the normally open cavity 200, thereby further reducing the volume of the entire gas distribution rod assembly.

[0054] Of course, the second side wall 220 and the first side wall 210 can also simultaneously incline to each other along the air inlet direction in the main air duct 100. Alternatively, the extension direction of the second side wall 220 is the same as the extension direction of the main air duct 100, and the first side wall 210 gradually inclines to the second side wall 220 along the air inlet direction in the main air duct 100, so that the first segmented cavity 301 can further extend to one end of the normally open cavity 200.

[0055] In some embodiments of the present application, the mounting hole 310 has a first face 311 and a second face 312 for forming a stepped structure, and the sealing cover 320 has an end face 322 and a side face 321, the end face 322 abuts against the first face 311, and the side face 321 tightly fits the second face 312.

[0056] Specifically, the first face 311 and the second face 312 for forming the stepped structure are perpendicular to each other, and correspondingly, the end face 322 and the side face 321 are perpendicular to each other, the end face 322 is used to cover the entire mounting hole 310, and the side face 321 is used to tightly fit the second face 312.

[0057] In this way, the end face 322 abuts against the first face 311, and the side face 321 tightly fits the second face 312, that is, through the simultaneous cooperation or abutment of the two groups of faces, the sealing effect of the sealing cover 320 is further increased.

[0058] In some embodiments, a sealant is arranged between the side face 321 and the second face 312; and / or, a sealant is arranged between the end face 322 and the first face 311.

[0059] Specifically, the sealing glue can be arranged between the side surface 321 and the second surface 312. The side surface 321 and the second surface 312 are bonded by the sealing glue to increase the sealing performance between the two surfaces. Alternatively, the sealing glue is arranged between the end surface 322 and the first surface 311. Alternatively, the sealing glue is arranged between the side surface 321 and the second surface 312, and the sealing glue is arranged between the end surface 322 and the first surface 311.

[0060] In some other embodiments, a sealing ring is arranged between the side surface 321 and the second surface 312 to achieve the sealing effect between the side surface 321 and the second surface 312; and / or, a sealing gasket is arranged between the end surface 322 and the first surface 311 to achieve the sealing effect between the end surface 322 and the first surface 311.

[0061] An embodiment of the present application further provides a gas water heater.

[0062] The gas water heater provided by the present application is characterized in that the sealing cover 320 is arranged on the mounting port 310 of the partial segment cavity 300 of the gas distribution rod assembly, and the original electromagnetic valve 330 is replaced by the sealing cover 320, so that the main gas channel 100 and the segment cavity 300 provided with the sealing cover 320 are also in the normally open state, the gas entering the main gas channel 100 can directly flow into the segment cavity 300, and then can be sprayed out through the nozzle 400 on the cavity wall of the segment cavity 300, for increasing the gas supply when ignition or small load. That is, the sealing cover 320 is arranged on the mounting port 310 of the partial segment cavity 300, so that the partial segment cavity 300 is changed from the adjustable cavity to the normally open cavity 200, the minimum load of the gas distribution rod assembly is increased, and the mold opening cost is reduced without the need of opening the mold again.

[0063] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist in contradiction, they shall be considered as the scope of the present application.

[0064] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, however, it shall not be understood as the limitation on the patent application scope. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be considered as the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A gas distributor assembly for a gas water heater, characterized in that, The gas distribution rod assembly comprises: a gas distribution rod, which is internally configured with a main gas channel, a normally open cavity and a plurality of segmented cavities, the normally open cavity is in communication with the main gas channel, the normally open cavity is provided with a nozzle on the cavity wall, each of the segmented cavities is in communication with the main gas channel, each of the segmented cavities is provided with a mounting port on the cavity wall, and each of the segmented cavities is provided with a nozzle on the cavity wall; and a sealing cover, which is arranged on at least part of the mounting ports of the segmented cavities.

2. The gas train assembly of the gas water heater of claim 1, wherein, The gas distribution rod assembly further comprises a solenoid valve, part of the mounting ports of the segmented cavities are provided with the sealing cover, and the remaining mounting ports of the segmented cavities are provided with the solenoid valve, which is used to control the on-off of the corresponding segmented cavities.

3. The gas train assembly of the gas water heater of claim 1, wherein, The mounting port has a first face and a second face for forming a stepped structure, the sealing cover has an end face and a side face, the end face is in sealing connection with the first face, and the side face is used to be in sealing connection with the second face.

4. The gas train assembly of a gas water heater according to claim 3, wherein, A sealant is arranged between the side face and the second face; and / or, a sealant is arranged between the end face and the first face.

5. The gas train assembly of the gas water heater of claim 2, wherein, The normally open cavity is arranged at one end of the main gas channel, the plurality of segmented cavities comprises a first segmented cavity and a second segmented cavity, the mounting port of the first segmented cavity is provided with the sealing cover, the mounting port of the second segmented cavity is provided with the solenoid valve, and the first segmented cavity and the second segmented cavity are respectively located on the left and right sides of the normally open cavity.

6. The gas train assembly of a gas water heater according to claim 5, wherein, The plurality of segmented cavities further comprises a third segmented cavity, which is located on the side of the second segmented cavity away from the normally open cavity, and the mounting port of the third segmented cavity is provided with the solenoid valve.

7. The gas train assembly of a gas water heater according to claim 6, wherein, The number of nozzles on the cavity walls of the first segmented cavity, the second segmented cavity and the third segmented cavity increases in turn.

8. The gas train assembly of the gas water heater of claim 1, wherein, Along the direction of air intake in the main gas channel, the cross-sectional area of the normally open cavity gradually decreases.

9. The gas train assembly of a gas water heater according to claim 8, wherein, The normally open cavity has a first side wall and a second side wall; The extension direction of the first side wall is the same as the extension direction of the main gas channel, and along the direction of air intake in the main gas channel, the second side wall gradually inclines to the first side wall.

10. A gas water heater, characterized by, The gas distribution rod assembly comprises the gas distribution rod assembly according to any one of claims 1-9.

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