Gas distribution rod assembly capable of reducing minimum thermal load and combustor

Abstract

The invention relates to the technical field of gas burners, and particularly discloses a gas distribution rod assembly capable of reducing the minimum thermal load and a burner. The gas distribution rod assembly capable of reducing the minimum thermal load comprises a gas distribution rod, a gas inlet seat and an electromagnetic valve, the air inlet seat is provided with an air inlet channel; a main nozzle and at least one group of gas distributing nozzles are arranged on the gas distributing rod, a connecting cavity and at least one gas distributing cavity are arranged in the gas distributing rod, each gas distributing cavity is communicated with one group of gas distributing nozzles, and each gas distributing cavity corresponds to one electromagnetic valve; the air inlet channel is communicated with the main nozzle and the connecting cavity; the inner wall of each air distribution cavity is provided with an air distribution hole communicated with the connecting cavity; and each electromagnetic valve comprises a valve plug, the valve plug of each electromagnetic valve is used for blocking or opening the gas distribution hole of the corresponding gas distribution cavity, and the valve plug is provided with a ventilation micro hole for the gas in the connecting cavity to enter the gas distribution cavity. The minimum heat load can be reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas burners, in particular to a gas distribution rod assembly and a burner capable of reducing a minimum heat load. Background Art

[0002] Existing fire-grate burners usually use gas distribution rod assemblies to control the number of fire-grate slices that generate flames, thereby adjusting the heat load. When the burner is at the minimum heat load, generally only one or two fire-grate slices are burning. In summer and other weather conditions with low heat load requirements, even if only one or two fire-grate slices are burning, it will cause a large temperature rise, affecting the user experience. Summary of the invention

[0003] The present invention provides a gas distribution rod assembly and a burner capable of reducing a minimum heat load, thereby reducing the minimum heat load and improving the user experience.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] According to the first aspect of the present invention, an embodiment of the present invention provides a gas distribution rod assembly that can reduce the minimum heat load, comprising a gas distribution rod, an air intake seat connected to the gas distribution rod, and at least one solenoid valve installed on the gas distribution rod; the air intake seat is provided with an air intake channel; the gas distribution rod is provided with a group of main nozzles and at least one group of gas distribution nozzles, the gas distribution rod is provided with a connecting cavity and at least one gas distribution cavity, each gas distribution cavity is connected with a group of gas distribution nozzles, and each gas distribution cavity corresponds to a solenoid valve; the air intake channel is connected with the main nozzle and the connecting cavity; the inner wall of each gas distribution cavity is provided with a gas distribution hole connected with the connecting cavity; each solenoid valve includes a valve plug, and the valve plug of each solenoid valve is used to block the gas distribution hole of its corresponding gas distribution cavity or open the gas distribution hole of its corresponding gas distribution cavity, and the valve plug is provided with air-permeable micropores for allowing the gas in the connecting cavity to enter the gas distribution cavity.

[0006] In some embodiments, the pore size of the air-permeable micropores is 0.3-0.5 mm.

[0007] In some embodiments, four air-permeable micropores are provided and are evenly distributed relative to the center of the valve plug.

[0008] In some embodiments, the solenoid valve and the air inlet seat are both arranged on the top surface of the air distribution rod.

[0009] In some embodiments, the gas distribution rod includes an air outlet portion and an air distribution portion, the air distribution portion is located on the side of the air outlet portion away from the burner and is connected to the air outlet portion; the height of the top surface of the air outlet portion is greater than the height of the top surface of the air distribution portion, and the solenoid valve and the air inlet seat are both arranged on the top surface of the air distribution portion.

[0010] In some embodiments, the connecting cavity is located in the air separation portion, a portion of the air separation cavity is located in the air outlet portion, and another portion is located in the air separation portion and below the connecting cavity, and the air separation hole is located on the bottom wall of the connecting cavity.

[0011] In some embodiments, the top wall of the connecting cavity is provided with reinforcing ribs.

[0012] In some embodiments, a main air cavity is provided in the air dividing rod, the air inlet passage is connected to the main air cavity, and the main air cavity is connected to the main nozzle; the main air cavity and the sub-air cavity are distributed along the length direction of the air dividing rod, and the sub-air cavity adjacent to the main air cavity forms an opening on the inner wall of the main air cavity, and the cross-sectional area of ​​the sub-air cavity adjacent to the main air cavity is smaller than the cross-sectional area of ​​the main air cavity, and an annular groove is provided around the opening on the inner wall of the main air cavity; a cover plate is provided in the main air cavity, the cover plate covers the opening, and a convex ring embedded in the annular groove is provided on the cover plate.

[0013] In some embodiments, each group of main nozzles and each group of gasification nozzles include two rows of nozzles distributed vertically and having different injection apertures.

[0014] According to a second aspect of the present invention, an embodiment of the present invention provides a burner, comprising a plurality of fire row monoliths and a gas distribution rod assembly capable of reducing a minimum heat load as described in any one of the first aspects above.

[0015] The present invention has at least the following beneficial effects: the present invention is provided with air-permeable micropores on the valve plug for allowing the gas in the connecting cavity to enter the gas dividing cavity. When the valve plugs of all the solenoid valves block the gas dividing holes of their corresponding gas dividing cavities, most of the gas is sprayed to the corresponding fire bar single piece through the main nozzle, so that the fire bar single piece corresponding to the main nozzle burns, and another part of the gas can enter the gas dividing cavity through the air-permeable micropores, and then be sprayed to other fire bar single pieces by the gas dividing nozzle. Since this part of the gas is very small, the other fire bar single pieces will not be able to burn or will burn incompletely, which is equivalent to diverting the gas that should originally flow to the main nozzle, thereby reducing the minimum heat load that the burner can achieve, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a gas distribution rod assembly capable of reducing the minimum heat load according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the gas distribution rod assembly capable of reducing the minimum heat load from another perspective;

[0018] Figure 3 for Figure 1 A schematic cross-sectional view of a gas distribution rod assembly capable of reducing a minimum heat load in a vertical section;

[0019] Figure 4 for Figure 1 A schematic cross-sectional view of the gas distribution rod assembly capable of reducing the minimum heat load under another vertical cross-section;

[0020] Figure 5 for Figure 1 A schematic cross-sectional view of a gas distribution rod assembly capable of reducing a minimum heat load in another vertical cross section;

[0021] Figure 6 for Figure 1 A schematic cross-sectional view of the gas distribution rod assembly capable of reducing the minimum heat load under other vertical sections;

[0022] Figure 7 A schematic diagram of the structure of a solenoid valve according to an embodiment of the present invention;

[0023] Figure 8 A schematic diagram of the structure of a burner according to an embodiment of the present invention;

[0024] Fig. 9 This is a schematic structural diagram of a gas water heater according to an embodiment of the present invention after a portion of the shell is removed;

[0025] Fig.10 for Fig. 9 The schematic diagram of the structure of the gas water heater shown in FIG. 1 after the water inlet pipe is removed;

[0026] Fig.11 A schematic diagram of the structure of a water pump according to an embodiment of the present invention;

[0027] Fig.12 The figure is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention.

[0028] Wherein, the accompanying drawings are marked as follows:

[0029] Housing 10;

[0030] Burner body 110, fire row single piece 111, heat exchanger 120, water pipe 121, water outlet joint 130, horizontal part 131, vertical part 132, fan 140;

[0031] The gas distribution rod assembly 200, the connecting cavity 201, the gas distribution cavity 202, the main gas cavity 203, the annular groove 204, the cover plate 205, the reinforcing rib 206; the gas distribution rod 210, the gas outlet portion 211, the gas distribution portion 212, the solenoid valve 220, the valve plug 221, the air permeable micropores 222, the main nozzle 231, the gas distribution nozzle 232, the air inlet seat 240, and the air inlet channel 241;

[0032] Intake valve assembly 300;

[0033] Water pump 400 , water inlet pipe 410 , water outlet 420 , and bracket 430 . DETAILED DESCRIPTION

[0034] The present invention provides the following description with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the present invention as defined by the claims and their equivalents. The description includes various specific details to assist in understanding, but these details should be considered as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present invention.

[0035] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do 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 should not be understood as a limitation on the present invention.

[0036] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.

[0037] An embodiment of the present invention provides a gas distribution rod assembly that can reduce the minimum heat load, such as Figure 1-7 As shown, it includes a gas distribution rod 210, an air intake seat 240 connected to the gas distribution rod 210, and two solenoid valves 220 installed on the gas distribution rod 210. The air intake seat 240 is provided with an air intake channel 241, and the air intake channel 241 is used to communicate with an external pipeline to receive the gas transported from the outside. A group of main nozzles 231 and two groups of gas nozzles 232 are provided on the gas distribution rod 210, and a group of main nozzles 231 includes one or more nozzles, and each group of gas nozzles 232 includes one or more nozzles, and the number of nozzles included in different groups of gas distribution nozzles 232 can be the same or different.

[0038] A connecting chamber 201 and two gas-dividing chambers 202 are provided in the gas-dividing rod 210, and each gas-dividing chamber 202 is connected to a group of gas-dividing nozzles 232. The gas in the gas-dividing chamber 202 can be sprayed to the corresponding fire bar single piece through the gas-dividing nozzles 232 connected thereto, so that the fire bar single piece burns. Each gas-dividing chamber 202 corresponds to a solenoid valve 220, and the solenoid valve 220 is used to control whether the corresponding gas-dividing chamber 202 is connected to the connecting chamber 201. The air inlet channel 241 is connected to both the main nozzle 231 and the connecting chamber 201. A part of the gas in the air-dividing chamber 241 can be sprayed to the fire bar single piece corresponding to the main nozzle 231 through the main nozzle 231, so that the corresponding fire bar single piece burns, and another part of the gas can enter the connecting chamber 201.

[0039] The inner wall of each gas-dividing cavity 202 is provided with a gas-dividing hole connected to the connecting cavity 201. Each solenoid valve 220 includes a valve plug 221, and the valve plug 221 of each solenoid valve 220 is used to block the gas-dividing hole of the corresponding gas-dividing cavity 202 or open the gas-dividing hole of the corresponding gas-dividing cavity 202. By opening or blocking the gas-dividing hole through the valve plug 221 of the solenoid valve 220, the gas-dividing nozzle 232 in the corresponding gas-dividing cavity 202 can spray gas to the corresponding fire bar single piece or stop spraying gas, and accordingly the number of fire bar single pieces in the combustion state can be changed, thereby adjusting the heat load.

[0040] In this embodiment, the valve plug 221 is provided with a ventilation micro-hole 222 for the gas in the connecting cavity 201 to enter the gas-dividing cavity 202. When the valve plugs 221 of all the solenoid valves 220 block the gas-dividing holes of the corresponding gas-dividing cavity 202, the burner is at the minimum heat load. At this time, most of the gas is sprayed to the corresponding fire bar single piece through the main nozzle 231, so that the fire bar single piece corresponding to the main nozzle 231 burns, and another part of the gas can enter the gas-dividing cavity 202 through the ventilation micro-hole 222, and then sprayed to another fire bar single piece by the gas-dividing nozzle 232. Since this part of the gas is very small, the other fire bar single piece will not burn or burn incompletely, which is equivalent to diverting the gas that should have flowed to the main nozzle 231, thereby reducing the minimum heat load that the burner can reach, reducing the temperature rise, and improving the user experience.

[0041] In some embodiments, the aperture of the air-permeable micropores 222 is 0.3-0.5 mm. After testing, when the aperture of the air-permeable micropores 222 is within this range, the incomplete combustion is within a controllable range, and the generated smoke will be carried away by the airflow, which can ensure that the smoke performance test is within the qualified range.

[0042] This structure is particularly suitable for thick and thin burners. When the thin flame burns incompletely, the smoke has been carried away by the airflow, while the thick flame has only a tiny flame. The flame after combustion is small, and the heat transferred to the heat exchanger is limited, which is lower than the heat load generated by the complete combustion of the single piece of the fire row corresponding to the main nozzle 231. And because only a little bit of the thin flame is incompletely burned, the smoke generated by the incomplete combustion has little effect on the overall performance, and the smoke performance test is within the qualified range.

[0043] In some embodiments, four air-permeable micropores 222 are provided and are evenly distributed relative to the center of the valve plug 221 , so that the gas can flow relatively evenly to the gas dividing cavity 202 .

[0044] In some embodiments, Figure 2-7As shown, the solenoid valve 220 and the air inlet seat 240 are both arranged on the top surface of the gas distribution rod 210. When the gas distribution rod assembly of this embodiment is applied to the burner, the solenoid valve 220 and the air inlet seat 240 do not protrude from the bottom surface of the burner body, and the space on the side of the burner body is reasonably utilized, making the overall structure compact, reducing the height of the entire burner, and reducing the overall volume of the gas water heater.

[0045] Furthermore, the gas distribution rod 210 includes a gas outlet portion 211 and a gas distribution portion 212, and the gas distribution portion 212 is located on a side of the gas outlet portion 211 away from the burner body and connected to the gas outlet portion 211. The height of the top surface of the gas outlet portion 211 is greater than the height of the top surface of the gas distribution portion 212, and the solenoid valve 220 and the gas inlet seat 240 are both arranged on the top surface of the gas distribution portion 212.

[0046] Since the top surface of the gas distribution part 212 is at a lower height, the top surfaces of the solenoid valve 220 and the air inlet seat 240 can be at a corresponding height, thereby reducing the space occupied above the gas distribution rod assembly, providing a larger installation space for other accessories of the gas water heater installed above the gas distribution rod assembly, which can further make the overall structure compact and reduce the overall volume of the gas water heater.

[0047] In this embodiment, the cross-sectional shape of the gas dividing rod 210 may be "L" shaped, the gas outlet portion 211 may be the part arranged vertically, and the gas dividing portion 212 may be the part arranged horizontally. The gas outlet portion 211 and the gas dividing portion 212 may be integrally formed, which facilitates the manufacture of the gas dividing rod 210 and can also enhance the strength of the connection between them.

[0048] Furthermore, the connecting chamber 201 is located in the air dividing portion 212, a part of the air dividing chamber 202 is located in the air outlet portion 211, and another part is located in the air dividing portion 212 and below the connecting chamber 201, and the air dividing hole is located on the bottom wall of the connecting chamber 201. Thus, the valve stem of the solenoid valve 220 arranged on the top surface of the air dividing portion 212 can directly extend downward into the connecting chamber 201, and the valve stem can open or block the air dividing hole by vertically moving the valve plug 221. The stroke of the valve stem is shortened, which facilitates the reasonable arrangement of the solenoid valve 220.

[0049] In some embodiments, the top wall of the connecting cavity 201 is provided with reinforcing ribs 206 , which can strengthen the structural strength of the top wall of the connecting cavity 201 , and the solenoid valve 220 can be fastened to the top surface of the gas dividing portion 212 by screws.

[0050] In some embodiments, Figure 2 , Figure 3 and Figure 6As shown, a main gas cavity 203 is provided in the gas distribution rod 210, and the gas inlet channel 241 is connected to the main gas cavity 203, and the main gas cavity 203 is connected to the main nozzle 231. After the gas in the gas inlet channel 241 enters the main gas cavity 203, it is sprayed toward the corresponding fire bar through the main nozzle 231.

[0051] The main air cavity 203 and the sub-air cavity 202 are distributed along the length direction of the air dividing rod 210. The sub-air cavity 202 adjacent to the main air cavity 203 forms an opening on the inner wall of the main air cavity 203, and the cross-sectional area of ​​the sub-air cavity 202 adjacent to the main air cavity 203 is smaller than the cross-sectional area of ​​the main air cavity. An annular groove 204 is provided around the opening on the inner wall of the main air cavity 203. A cover plate 205 is provided in the main air cavity 203, the cover plate 205 covers the opening, and a convex ring embedded in the annular groove 204 is provided on the cover plate 205. This structure can simplify the sealing process and improve the sealing performance.

[0052] A groove is formed on the surface of the gas dividing rod 210 at one end of the main gas cavity 203 away from the gas dividing cavity 202, and the inserts for forming the main gas cavity 203 and the gas dividing cavity 202 can be demoulded through the groove, or the main gas cavity 203 and the gas dividing cavity 202 can be dug out through the groove. The cover plate 205 can be inserted into the main gas cavity 203 through the groove, and after the cover plate 205 is placed, the groove can be covered by a plug cover.

[0053] In some embodiments, Figure 1 As shown, each group of main nozzles 231 and each group of gasification nozzles 232 include two rows of nozzles distributed up and down and with different injection apertures. Each row of nozzles may include one or more nozzles. The injection aperture of the nozzle located above is different from the injection aperture of the nozzle located below. One has a large injection aperture and the other has a small injection aperture. This can form rich-lean combustion, which is suitable for rich-lean burners.

[0054] In this embodiment, the injection aperture of the nozzle located at the top may be smaller than the injection aperture of the nozzle located at the bottom. The nozzle may be located on the side of the gas separation rod 210, specifically, on the side of the gas outlet portion away from the gas separation portion of the above embodiment.

[0055] The side of the gas distribution rod 210 may be provided with a protruding rib, and the nozzle may be fixed at the rib. The rib is equivalent to increasing the wall thickness of the gas distribution rod 210 and improving the verticality of the nozzle installation, thereby ensuring that the nozzle can correctly guide the gas to the burner.

[0056] The nozzle located at the top can extend outwards longer than the nozzle located at the bottom, so as to reduce primary air and achieve a better flame state.

[0057] Based on the above embodiments, the embodiments of the present invention also provide another gas distribution rod assembly that can reduce the minimum heat load. The difference from the above embodiments is that only one solenoid valve is installed on the gas distribution rod, and accordingly, only one gas distribution cavity is provided, and only one group of gas distribution nozzles is provided.

[0058] The gas separation cavity is connected to the group of gas nozzles, and the inner wall of the gas separation cavity is provided with a gas separation hole connected to the connecting cavity. The solenoid valve includes a valve plug, and the valve plug of the solenoid valve is used to block the gas separation hole of the gas separation cavity or open the gas separation hole of the gas separation cavity. By opening or blocking the gas separation hole by the valve plug, the gas separation nozzle in the corresponding gas separation cavity can spray gas to the corresponding fire bar single piece or stop spraying gas, and accordingly the number of fire bar single pieces in the combustion state can be changed, thereby adjusting the heat load.

[0059] This embodiment also provides air-permeable micro-holes on the valve plug for the gas in the connecting cavity to enter the air-dividing cavity. When the valve plug of the solenoid valve blocks the air-dividing holes of the air-dividing cavity, the burner is at the minimum heat load. At this time, most of the gas is sprayed to the corresponding fire bar single piece through the main nozzle, so that the fire bar single piece corresponding to the main nozzle burns, and the other part of the gas can enter the air-dividing cavity through the air-permeable micro-holes, and then sprayed to the other fire bar single piece by the air-dividing nozzle. Since this part of the gas is very small, the other fire bar single piece will not burn or burn incompletely, which is equivalent to diverting the gas that should have flowed to the main nozzle, thereby reducing the minimum heat load that the burner can reach, which can reduce the temperature rise and improve the user experience.

[0060] Furthermore, the aperture of the air-permeable micropores of this embodiment may also be set to 0.3-0.5 mm; four air-permeable micropores may also be provided and evenly distributed relative to the center of the valve plug.

[0061] Of course, according to actual needs, more solenoid valves can be installed on the gas distribution rod, and accordingly, more gas distribution cavities can be provided, and more groups of gas distribution nozzles can also be provided.

[0062] An embodiment of the present invention provides a burner, such as Figure 8 As shown, it includes a burner body 110 and a gas distribution rod assembly capable of reducing the minimum heat load according to any of the above embodiments. The specific description of the gas distribution rod assembly capable of reducing the minimum heat load can be referred to the above embodiments, which will not be repeated here.

[0063] The burner body 110 includes a plurality of fire bar single pieces 111 , and the nozzles included in each group of main nozzles and each group of gas nozzles correspond to one fire bar single piece 111 , so that the nozzles can spray gas to the corresponding fire bar single piece 111 .

[0064] When each group of main nozzles and each group of gas nozzles include two rows of nozzles distributed vertically and having different spray apertures, two nozzles located in the same vertical direction correspond to one fire bar single piece 111 , and the two nozzles spray gas to one fire bar single piece 111 .

[0065] The embodiment of the present invention also provides a gas water heater, such as Figure 9-12 As shown, it includes a shell 10, a heat exchanger 120 and a burner of any of the above-mentioned embodiments. The description of the burner can refer to the above-mentioned embodiments and will not be repeated here. The heat exchanger 120, the burner body 110 and the gas distribution rod assembly 200 are all fixed in the shell 10. The heat exchanger 120 is fixed on the top of the burner body 110. The heat generated by the combustion of the burner body 110 is transferred to the heat exchanger 120. The heat exchanger 120 then heats the water in its pipeline, thereby producing hot water. The gas distribution rod assembly 200 is arranged on one side of the burner body 110, and the gas distribution rod assembly 200 is used to spray gas to the burner body 110 for combustion of the burner body 110.

[0066] In some embodiments, the gas water heater further includes an air intake valve assembly 300, which has functions such as adjusting the gas flow rate and controlling the on-off of the gas pipeline. The air intake valve assembly 300 is arranged on a side of the gas distribution rod assembly 200 away from the burner body 110, and the air intake valve assembly 300 is connected to the gas distribution rod 110 and is used to deliver gas to the gas distribution rod 110.

[0067] Compared with the existing gas water heaters, the air intake valve assembly 300 of this embodiment is also arranged on one side of the burner body 110. The air intake valve assembly 300 is relatively difficult to protrude below the burner body 110, and the space on the side of the burner body 110 can be further utilized to further reduce the overall volume of the gas water heater.

[0068] In this embodiment, the intake valve assembly 300 may be specifically connected to the intake passage of the above embodiment.

[0069] In some embodiments, the gas water heater further includes a water pump 400 disposed in the housing 10. The water pump 400 is connected to the heat exchanger 120 to deliver water to the heat exchanger 120, so that the heat exchanger 120 can continuously heat cold water and continuously generate hot water. The water pump 400 is located on one side of the heat exchanger 120 and above the gas distribution rod assembly 200, that is, the heat exchanger 120 and the gas distribution rod assembly 200 are located on the same side of the burner body 110.

[0070] Compared with the existing gas water heaters, this embodiment transfers the water pump 400 from the bottom of the burner body 110 to one side of the heat exchanger 120, which rationally utilizes the space above the gas distribution rod assembly 200, further makes the overall structure compact, and reduces the overall volume of the gas water heater.

[0071] Furthermore, the rear side of the water pump 400 is fixed on the shell 10, the front side of the water pump 400 is provided with a water inlet pipe 410, and the top of the water pump 400 is provided with a water outlet 420. When the water pump 400 is working, water flows into the water pump 400 from the water inlet pipe 410 and is then output from the water outlet 420. The water outlet 420 is connected to the heat exchanger 120 to transport the water to be heated to the heat exchanger 120.

[0072] In this embodiment, the rear side of the water pump 400 is fixed on the shell 10, the corresponding mounting structure is located on the rear side of the water pump 400, the water inlet pipe 410 is located on the front side of the water pump 400, and the water outlet 420 is located on the top of the water pump 400. This design can minimize the space occupied on the left and right sides of the water pump 400, reduce the space occupied by the water pump 400 in the horizontal direction, and correspondingly reduce the overall width of the gas water heater.

[0073] In some embodiments, the heat exchanger 120 of this embodiment includes a water pipe 121, along which the water to be heated flows, and the heat exchanger 120 heats the water in the water pipe 121. The outlet end of the water pipe 121 is connected to a water outlet joint 130, which is mounted on the housing 10 and located below the burner body 110.

[0074] In this embodiment, the water outlet joint 130 is arranged below the burner body 110, and the water delivery pipe 121 is also close to the heat exchanger 120, so that the overall structure is more compact. At the same time, since the water outlet joint 130 is installed on the housing 10, the impact on the bottom space of the burner body 110 is very small.

[0075] In this embodiment, the water delivery pipe 121 may be connected to the water outlet 420 of the water pump 400 of the above embodiment.

[0076] Furthermore, the water outlet joint 130 includes a transverse portion 131 extending laterally and a vertical portion 132 extending vertically. The water pipe 121 is bent from the side of the burner body 110 to the bottom of the burner body 110 and is connected to one end of the transverse portion 131. The other end of the transverse portion 131 is connected to the upper end of the vertical portion 132. The lower end of the vertical portion 132 is used to connect to an external pipeline.

[0077] This structure can reduce the height of the water outlet joint 130, thereby minimizing the space occupied in the height direction.

[0078] The horizontal portion 131 and the vertical portion 132 may be integrally formed.

[0079] In some embodiments, the burner body 110 is a rich-lean burner, and the flame of the rich-lean burner is relatively short, thereby reducing the height of the entire gas water heater and further reducing the volume of the entire machine.

[0080] In some embodiments, the gas water heater further comprises a fan 140 fixed on the top of the heat exchanger 120 , and the fan 140 comprises a plug-in impeller, which has the advantage of low noise.

[0081] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the present invention is provided only for illustration, and not for limiting the present invention as defined by the attached claims and their equivalents.

Claims

1. A gas distribution rod assembly capable of reducing the minimum heat load, characterized in that: It includes a gas dividing rod, an air intake seat connected to the gas dividing rod and at least one solenoid valve installed on the gas dividing rod; the air intake seat is provided with an air intake channel; the gas dividing rod is provided with a group of main nozzles and at least one group of gas dividing nozzles, the gas dividing rod is provided with a connecting cavity and at least one gas dividing cavity, each gas dividing cavity is connected with a group of gas dividing nozzles, and each gas dividing cavity corresponds to a solenoid valve; the air intake channel is connected with the main nozzle and the connecting cavity; the inner wall of each gas dividing cavity is provided with a gas dividing hole connected with the connecting cavity; each solenoid valve includes a valve plug, and the valve plug of each solenoid valve is used to block the gas dividing hole of its corresponding gas dividing cavity or open the gas dividing hole of its corresponding gas dividing cavity, and the valve plug is provided with air-permeable micropores for allowing the gas in the connecting cavity to enter the gas dividing cavity.

2. The gas distribution rod assembly capable of reducing the minimum heat load according to claim 1, characterized in that: The pore size of the air-permeable micropores is 0.3-0.5 mm.

3. The gas distribution rod assembly capable of reducing the minimum heat load according to claim 1, characterized in that: The number of the air-permeable micropores is four and they are evenly distributed relative to the center of the valve plug.

4. The gas distribution rod assembly capable of reducing the minimum heat load according to any one of claims 1 to 3, characterized in that: The solenoid valve and the air intake seat are both arranged on the top surface of the air distribution rod.

5. The gas distribution rod assembly capable of reducing the minimum heat load according to claim 4, characterized in that: The gas distribution rod includes an air outlet part and an air distribution part, the air distribution part is located on the side of the air outlet part away from the burner and is connected to the air outlet part; the height of the top surface of the air outlet part is greater than the height of the top surface of the air distribution part, and the solenoid valve and the air inlet seat are both arranged on the top surface of the air distribution part.

6. The gas distribution rod assembly capable of reducing the minimum heat load according to claim 5, characterized in that: The connecting cavity is located in the air separation part, a part of the air separation cavity is located in the air outlet part, and another part is located in the air separation part and below the connecting cavity, and the air separation hole is located on the bottom wall of the connecting cavity.

7. The gas distribution rod assembly capable of reducing the minimum heat load according to claim 6, characterized in that: The top wall of the connecting cavity is provided with reinforcing ribs.

8. The gas distribution rod assembly capable of reducing the minimum heat load according to any one of claims 1 to 3, characterized in that: A main air cavity is arranged in the air dividing rod, the air inlet passage is connected with the main air cavity, and the main air cavity is connected with the main nozzle; the main air cavity and the sub-air cavity are distributed along the length direction of the air dividing rod, and the sub-air cavity adjacent to the main air cavity forms an opening on the inner wall of the main air cavity, and the cross-sectional area of ​​the sub-air cavity adjacent to the main air cavity is smaller than the cross-sectional area of ​​the main air cavity, and an annular groove is arranged around the opening on the inner wall of the main air cavity; a cover plate is arranged in the main air cavity, the cover plate covers the opening, and a convex ring embedded in the annular groove is arranged on the cover plate.

9. The gas distribution rod assembly capable of reducing the minimum heat load according to any one of claims 1 to 3, characterized in that: Each group of main nozzles and each group of gasification nozzles include two rows of nozzles distributed up and down and having different injection apertures.

10. A burner, characterized in that: The invention comprises a plurality of fire row monoliths and a gas distribution rod assembly capable of reducing the minimum heat load as claimed in any one of claims 1 to 9.

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