Gas water heater and gas distribution rod assembly thereof

Abstract

The invention 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, and in particular to a gas water heater and a gas distribution rod assembly thereof. Background Art

[0002] The gas distribution rod assembly of the gas water heater is the core component of the gas water heater, responsible for gas distribution. It is mostly made by die casting. Its working principle is that the gas passes through the main gas channel and enters each segmented cavity, and then enters each nozzle through each segmented cavity to distribute the gas source for the burner combustion through each nozzle, and the on and off of each segmented cavity is controlled by the solenoid valve.

[0003] In the related art, the segmented cavities and the number of nozzles of a gas splitter rod assembly are fixed, and each segmented cavity is formed by a mold or post-processing. For such a gas splitter rod assembly with a fixed number of nozzles and a fixed segmented cavity, if the minimum load of the gas splitter rod assembly is to be increased, the mold needs to be re-opened, which has a high cost problem. Summary of the invention

[0004] Based on this, it is necessary to provide a gas water heater and its gas distribution rod assembly to address the problem of high cost of re-molding when the minimum load of the gas distribution rod assembly needs to be increased.

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

[0006] An air dividing rod, wherein a main airway, a normally open cavity and a plurality of segmented cavities are constructed therein, the normally open cavity is connected to the main airway, and a nozzle is provided on the cavity wall of the normally open cavity; the plurality of segmented cavities are respectively connected to the main airway, each of the segmented cavities is respectively provided with a mounting port, and a nozzle is provided on the cavity wall of each segmented cavity; and

[0007] A sealing cover is provided on at least a portion of the mounting openings of the segmented cavity.

[0008] In one embodiment, the gas distribution rod assembly also includes a solenoid valve, the sealing cover is provided on the installation port of some of the segmented cavities, and the solenoid valve is provided on the installation port of the remaining segmented cavities, and the solenoid valve is used to control the connection and disconnection of the corresponding segmented cavity and the main airway.

[0009] In one embodiment, the installation opening has a first surface and a second surface for forming a step structure, and the sealing cover has an end surface and a side surface, the end surface is sealed to the first surface, and the side surface is used to be sealed to the second surface.

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

[0011] In one embodiment, the normally open cavity is arranged at one end of the main airway, and the multiple segmented cavities include a first segmented cavity and a second segmented cavity, the mounting port of the first segmented cavity is provided with the sealing cover, and 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.

[0012] In one embodiment, the plurality of segmented cavities further include a third segmented cavity, the third segmented cavity is located on a side of the second segmented cavity away from the normally open cavity, and the solenoid valve is disposed at the mounting port of the third segmented cavity.

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

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

[0015] In one embodiment, the normally open cavity includes 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 air passage, and along the air intake direction in the main air passage, the second side wall gradually inclines toward the first side wall.

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

[0018] The above-mentioned gas water heater and its gas distribution rod assembly have a normally open cavity used to supply gas during ignition or light load. A sealing cover is provided on the installation port of some of the segmented cavities. The sealing cover replaces the original solenoid valve to ensure the airtightness of the segmented cavity, so that the main gas channel and the segmented cavity provided with the sealing cover are also in a direct connection state. The gas entering the main gas channel can flow directly into the segmented cavity, and then can be sprayed out through the nozzle on the cavity wall of the segmented cavity, which is used to increase the gas supply during ignition or light load. That is, the present application provides a sealing cover on the installation port of some segmented cavities, thereby changing the segmented cavities from adjustable cavities to normally open cavities, thereby increasing the minimum load of the gas distribution rod assembly, and at the same time, there is no need to re-open the mold, thereby reducing the mold opening cost. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] FIG. 2 is a schematic cross-sectional view of a gas distribution rod assembly in one embodiment.

[0021] Figure numerals: 100, main air channel; 110, branch air channel; 200, normally open cavity; 210, first side wall; 220, second side wall; 300, segmented cavity; 301, first segmented cavity; 302, second segmented cavity; 303, third segmented cavity; 310, installation port; 311, first surface; 312, second surface; 320, sealing cover; 321, side surface; 322, end surface; 330, solenoid valve; 400, nozzle. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0027] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0028] In the gas water heater gas distribution rod assembly in the related art, the normally open cavity is directly connected to the main airway, and is used for ignition or small load air intake. At this time, the nozzles on the cavity wall of the segmented cavity are closed by the solenoid valve, and air is only taken in through the nozzles on the cavity wall of the normally open cavity. However, since the number of nozzles on the cavity wall of the normally open cavity is a fixed value, its air intake is also a fixed value. Therefore, when the air intake for ignition or small load needs to be increased, it is necessary to re-open the mold 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 Fig. 1 and Fig. 2, a gas distribution rod assembly of a gas water heater provided in an embodiment of the present application includes a gas distribution rod and a sealing cover, wherein the gas distribution rod is 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 respectively connected with the main gas channel 100, and a mounting port 310 is respectively arranged on the cavity wall of each segmented cavity 300, and a nozzle 400 is arranged on the cavity wall of each segmented cavity 300; a sealing cover 320 is arranged on the mounting port 310 of at least some of the segmented cavities 300, so as to ensure that the segmented cavity 300 provided with the sealing cover 320 is always in communication with the main gas channel 100.

[0030] In this embodiment, the normally open cavity 200 is used to supply gas during ignition or light load, and a sealing cover 320 is provided on the mounting port 310 of the partial segmented cavity 300. The sealing cover 320 replaces the original solenoid valve 330, and the sealing cover 320 is used to block the mounting port 310 to ensure the air tightness 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 a direct connection state, and the gas entering the main gas channel 100 can flow directly into the segmented cavity 300, and then can be sprayed out through the nozzle 400 on the cavity wall of the segmented cavity 300, which is used to increase the gas supply during ignition or light load. That is, the present application changes the partially segmented cavity 300 from an adjustable cavity to a normally open cavity by providing a sealing cover 320 on the mounting port 310 of the partial segmented cavity 300, thereby increasing the minimum load of the gas distribution rod assembly, and at the same time, there is no need to re-open the mold, thereby reducing the mold opening cost. At the same time, the use of the electromagnetic valve 330 can be reduced, thereby reducing costs.

[0031] Furthermore, the gas rod assembly also includes a solenoid valve 330 , the installation ports 310 of some segmented cavities 300 are provided with sealing covers 320 , and the installation ports 310 of other segmented cavities 300 are provided with solenoid valves 330 , which are used to control the opening and closing of the corresponding segmented cavities 300 .

[0032] In this way, the installation port 310 of the remaining segmented cavity 300 is provided with a solenoid valve 330, and the solenoid valve 330 is used to control the opening and closing of the corresponding segmented cavity 300. When the nozzles on the cavity wall of the normally open cavity 200 and the segmented cavity 300 partially provided with a sealing cover 320 cannot meet the required load requirements, the solenoid valve 330 is required to control the corresponding segmented cavity 300 to open, so that the nozzle 400 on the cavity wall of the segmented cavity 300 can also supply air to achieve the effect of increasing the load.

[0033] Of course, in other special cases, if it is necessary to significantly increase the air intake volume in the normally open state, a sealing cover 320 may be provided at the mounting opening 310 of all segmented cavities 300, that is, all segmented cavities 300 are normally open cavities 200, and the gas in the main air intake passage 100 can be directly ejected through all nozzles 400. It is not necessary to re-open the mold, and only the solenoid valve 330 on the mounting opening 310 needs to be replaced with the sealing cover 320.

[0034] In one embodiment of the present application, the normally open cavity 200 is arranged at one end of the main airway 100, and the multiple segmented cavities 300 include a first segmented cavity 301 and a second segmented cavity 302. The installation port 310 of the first segmented cavity 301 is provided with a sealing cover 320, and the installation port 310 of the second segmented cavity 302 is provided with a solenoid 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 with relative positions.

[0035] In this configuration, the installation opening 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 during ignition or low load, so as to increase the minimum gas supply of the gas rod assembly. That is, the number of nozzles 400 during initial ignition or low load use can be increased without re-opening the mold.

[0036] Furthermore, the plurality of segmented cavities 300 further include a third segmented cavity 303 , which is located on a side of the second segmented cavity 302 away from the normally open cavity 200 , and a solenoid valve 330 is disposed at the mounting port 310 of the third segmented cavity 303 .

[0037] With such arrangement, the gas passes through the main gas duct 100 and enters the normally open cavity 200 and the segmented cavity 300 in sequence, the first segmented cavity 301 and the second segmented cavity 302 are respectively located on two opposite sides of the normally open cavity 200, and 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 duct 100 first needs to pass through the second segmented cavity 302 before entering the third segmented cavity 303. Therefore, when the installation port 310 of the second segmented cavity 302 is provided with a solenoid valve 330, the installation port 310 of the third segmented cavity 303 is also provided with a solenoid valve 330. When the load needs to be increased, the solenoid valve 330 of the second segmented cavity 302 is opened first. If the load needs to be increased, the solenoid valve 330 of the third segmented cavity 303 is opened. If the second segmented cavity 302 can directly meet the load requirement, there is no need to open the third segmented cavity 303.

[0038] Specifically, the air dividing rod assembly also includes an air dividing channel 110, which is perpendicular to the main air channel 100. The installation openings 310 of the first segmented cavity 301, the second segmented cavity 302 and the third segmented cavity 303 are all located on the air dividing channel 110. The first segmented cavity 301, the normally open cavity 200, the second segmented cavity 302 and the third segmented cavity 303 are arranged in sequence along the cavity channel, and the cavity channel is parallel to the air dividing channel 110.

[0039] The first segmented cavity 301 is connected to the gas channel 110 through the first branch channel, and the second segmented cavity 302 is connected to the gas channel 110 through the second branch channel. The solenoid valve 330 on the second segmented cavity 302 is used to control the on-off of one end of the gas channel 110 connected to the second branch channel; the third segmented cavity 303 is connected to the gas channel 110 through the third branch channel, and the solenoid valve 330 on the third segmented cavity 303 is used to control the on-off of one end of the gas channel 110 connected to the third branch channel.

[0040] A nozzle 400 is arranged on the wall of the normally open chamber, and all nozzles 400 are arranged in sequence along the extension direction of the cavity channel, and the distance between any two adjacent nozzles 400 is equal, so that multiple nozzles 400 can spray evenly and improve combustion efficiency.

[0041] In some other embodiments, the installation port 310 of the second segmented cavity 302 may be provided with a solenoid valve 330, and the installation port 310 of the third segmented cavity 303 may be provided with a sealing cover 320, that is, the solenoid valve 330 of the second segmented cavity 302 is used to control the on-off of the second segmented cavity 302 and the third segmented cavity 303 at the same time. When the solenoid valve 330 of the second segmented cavity 302 is opened, the second segmented cavity 302 and the third segmented cavity 303 are connected to the main airway 100 at the same time to meet the demand of significantly increasing the load.

[0042] In other embodiments, the installation port 310 of the second segmented cavity is provided with a sealing cover 320, the installation port 310 of the first segmented cavity is provided with a solenoid valve 330, the installation port 310 of the third segmented cavity is provided with a solenoid valve 330, and the second segmented cavity 302 and the first segmented cavity 301 are respectively located on opposite sides of the normally open cavity position. That is, the second segmented cavity 302 is in a normally open state, which can also increase the minimum load of the gas rod assembly.

[0043] In some embodiments of the present application, the number of nozzles 400 on the cavity walls of the first segmented cavity 301, the second segmented cavity 302, and the third segmented cavity 303 increases in sequence. For example, the number of nozzles 400 in the first segmented cavity 301 is one, the number of nozzles 400 in the second segmented cavity 302 is two, and the number of nozzles 400 in the third segmented cavity 303 is three. The mounting port 310 of the first segmented cavity 301 is provided with a sealing cover 320 for increasing the air supply at the minimum amplitude during ignition or light load.

[0044] When it is necessary to further increase the air supply during ignition or light load, a sealing cover 320 can be provided at the mounting port 310 of the second segmented cavity 302 to significantly increase the air supply during ignition or light load. Alternatively, the mounting port 310 of the first segmented cavity 301 and the mounting port 310 of the second segmented cavity 302 are both provided with sealing covers 320 to further increase the air supply during ignition or light load.

[0045] For another example, the normally open chamber is provided with a nozzle 400, the number of nozzles 400 of the first segmented cavity 301 is two, the number of nozzles 400 of the second segmented cavity 302 is three, and the number of nozzles 400 of the third segmented cavity 303 is four. Of course, the gas rod assembly may also include a fourth segmented cavity, and the number of nozzles on the cavity wall of the fourth segmented cavity is greater than the number of nozzles on the cavity wall of the third segmented cavity.

[0046] Alternatively, the number of nozzles 400 on the cavity wall of each segmented cavity 300 is the same.

[0047] Furthermore, the third segmented cavity 303 has the largest number of nozzles on its wall, and its inner diameter is larger than that of the second segmented cavity 302 , so as to accommodate more gas and ensure the gas supply to all nozzles on its wall.

[0048] Specifically, along the direction from the third segmented cavity 303 to the second segmented cavity 302 , the inner diameters of the third segmented cavity 303 and the second segmented cavity 302 gradually decrease.

[0049] In some embodiments of the present application, along the air intake direction in the main air channel 100 , the cross-sectional area of ​​the normally open cavity 200 gradually decreases.

[0050] In this way, the normally open cavity 200 is arranged at one end of the main air duct 100. In order to reduce the intake resistance, the air inlet of the normally open cavity 200 is equal to the inner diameter of the main air duct 100. However, the normally open cavity 200 is used for air supply during ignition or light load, and the air supply volume is small. Therefore, the cross-sectional area of ​​the normally open cavity 200 gradually decreases to further reduce the volume of the entire air distribution rod assembly.

[0051] Among them, along the air intake direction in the main air duct 100, the cross-sectional area of ​​the main air duct 100 gradually decreases, and the normally open cavity 200 is connected to the end with the smallest cross-section of the main air duct 100, so that the gas flows smoothly into the normally open chamber 200, reducing air flow resistance and reducing energy consumption.

[0052] Furthermore, 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 along the air intake direction in the main air duct 100, the second side wall 220 gradually inclines toward the first side wall 210.

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

[0054] Of course, it is also possible that the second side wall 220 and the first side wall 210 are inclined toward the side close to each other at the same time along the air intake direction in the main air passage 100. Alternatively, along the air intake direction in the main air passage 100, the extension direction of the second side wall 220 is the same as the extension direction of the main air passage 100, and the first side wall 210 gradually inclines toward the second side wall 220, so that the first segmented cavity 301 can further extend toward one end of the normally open cavity 200.

[0055] In some embodiments of the present application, the mounting opening 310 has a first surface 311 and a second surface 312 for forming a step structure, and the sealing cover 320 has an end surface 322 and a side surface 321 , the end surface 322 is in close contact with the first surface 311 , and the side surface 321 is tightly matched with the second surface 312 .

[0056] Specifically, the first surface 311 and the second surface 312 for forming the step structure are perpendicular to each other. Correspondingly, the end surface 322 and the side surface 321 are perpendicular to each other. The end surface 322 is used to cover the entire installation opening 310 , and the side surface 321 is used to fit tightly with the second surface 312 .

[0057] With such arrangement, the end surface 322 is in close contact with the first surface 311 , and the side surface 321 is closely matched with the second surface 312 , that is, the sealing effect of the sealing cover 320 is further enhanced through the simultaneous matching or abutment of the two sets of surfaces.

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

[0059] Specifically, a sealant may be provided between the side surface 321 and the second surface 312. The side surface 321 and the second surface 312 are bonded by the sealant to increase the sealing performance between the two surfaces. Alternatively, a sealant may be provided between the end surface 322 and the first surface 311. Alternatively, a sealant may be provided between the side surface 321 and the second surface 312, and a sealant may be provided between the end surface 322 and the first surface 311.

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

[0061] An embodiment of the present application also provides a gas water heater, including a gas distribution rod assembly.

[0062] In the gas water heater of the present application, a sealing cover 320 is provided on the mounting port 310 of the partial segmented cavity 300 of the gas distribution rod assembly, and the sealing cover 320 replaces the original solenoid valve 330, so that the main gas channel 100 and the segmented cavity 300 provided with the sealing cover 320 are also in a normally open state, and the gas entering the main gas channel 100 can flow directly into the segmented cavity 300, and then can be sprayed out through the nozzle 400 on the cavity wall of the segmented cavity 300, which is used to increase the gas supply during ignition or small load. That is, the present application sets a sealing cover 320 on the mounting port 310 of the partial segmented cavity 300, so that the partial segmented cavity 300 is changed from an adjustable cavity to a normally open cavity 200, thereby increasing the minimum load of the gas distribution rod assembly, and at the same time, there is no need to re-open the mold, thereby reducing the mold opening cost.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A gas distribution rod assembly for a gas water heater, characterized in that: The gas distribution rod assembly comprises: An air dividing rod, wherein a main airway, a normally open cavity and a plurality of segmented cavities are constructed therein, the normally open cavity is in communication with the main airway, and a nozzle is provided on the cavity wall of the normally open cavity; each of the segmented cavities can be respectively in communication with the main airway, and a mounting port is respectively provided on the cavity wall of each of the segmented cavities, and a nozzle is provided on the cavity wall of each of the segmented cavities; and A sealing cover is provided on at least a portion of the mounting openings of the segmented cavity.

2. The gas distribution rod assembly of the gas water heater according to claim 1, characterized in that: The gas distribution rod assembly also includes a solenoid valve. The sealing cover is provided on the installation opening of some of the segmented cavities, and the solenoid valve is provided on the installation opening of the remaining segmented cavities. The solenoid valve is used to control the opening and closing of the corresponding segmented cavity.

3. The gas distribution rod assembly of the gas water heater according to claim 1, characterized in that: The installation opening has a first surface and a second surface for forming a step structure, and the sealing cover has an end surface and a side surface, the end surface is sealedly connected to the first surface, and the side surface is used to be sealedly connected to the second surface.

4. The gas distribution rod assembly of the gas water heater according to claim 3, characterized in that: A sealant is provided between the side surface and the second surface; and / or a sealant is provided between the end surface and the first surface.

5. The gas distribution rod assembly of the gas water heater according to claim 2, characterized in that: The normally open cavity is arranged at one end of the main airway, and the multiple segmented cavities include a first segmented cavity and a second segmented cavity. The mounting port of the first segmented cavity is provided with the sealing cover, and the mounting port of the second segmented cavity is provided with the solenoid valve. 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 distribution rod assembly of the gas water heater according to claim 5, characterized in that: The plurality of segmented cavities further include a third segmented cavity, which is located on a side of the second segmented cavity away from the normally open cavity, and the solenoid valve is disposed at a mounting opening of the third segmented cavity.

7. The gas distribution rod assembly of the gas water heater according to claim 6, characterized in that: The number of nozzles on the cavity walls of the first segmented cavity, the second segmented cavity and the third segmented cavity increases sequentially.

8. The gas distribution rod assembly of the gas water heater according to claim 1, characterized in that: Along the air intake direction in the main air passage, the cross-sectional area of ​​the normally open cavity gradually decreases.

9. The gas distribution rod assembly of the gas water heater according to claim 8, characterized in that: 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 air passage, and along the air intake direction in the main air passage, the second side wall gradually inclines toward the first side wall.

10. A gas water heater, characterized in that: The invention comprises the gas distribution rod assembly as described in any one of claims 1 to 9.

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