Combustor and gas water heater

Abstract

The application discloses a burner and a gas water heater, the burner comprises a plurality of fire bars and a mixed gas control device; each of the fire bars is provided with at least three air inlets, and a plurality of the fire bars are arranged in parallel to form at least three rows of the air inlets; the mixed gas control device is arranged at the air inlets of the fire bars, and the mixed gas control device is used for controlling the proportion relationship between the air content and the gas content entering the fire bar. The burner and the gas water heater are used to solve the technical problem that the existing burner is unreliable in ignition due to the large amount of primary air and the insufficient gas concentration.

Description

Technical Field

[0001] This invention relates to the field of gas appliance technology, and more particularly to a burner and a gas water heater. Background Technology

[0002] As is well known, the burner is a crucial component of a gas water heater. Existing burners consist of multiple burners arranged side-by-side, giving the burner head a harmonica-like structure. Gas is ejected from the burner's combustion panel and ignited by the ignition needle. The high-temperature flue gas produced by the combustion heats the water in the main heat exchanger. Water-cooled burners typically employ a single-plate, two-point injection air intake structure. To achieve low nitrogen oxide emissions, a large primary air intake is required to achieve lean combustion. However, this design can lead to unreliable ignition due to insufficient gas concentration, resulting in problems such as failure to ignite, deflagration, or flame lift-off. Summary of the Invention

[0003] The main objective of this invention is to provide a burner and a gas water heater that solves the technical problem of unreliable ignition caused by insufficient gas concentration due to large primary air intake in existing burners.

[0004] To achieve the above objectives, the burner proposed in this invention includes a plurality of burners and a gas mixture control device; each burner is provided with at least three air inlets, and the plurality of burners are arranged in parallel to form at least three rows of air inlets; the gas mixture control device is located at the air inlet of the burner, and the gas mixture control device is used to control the ratio of air content to fuel gas content entering the burner.

[0005] Preferably, the mixed gas control device includes a baffle plate, and a baffle plate is provided at at least one row of air inlets. The baffle plate is provided with a plurality of ventilation holes corresponding to the air inlets, and the ventilation holes are used to control the amount of air entering the air inlets.

[0006] Preferably, the baffle plate is fitted to the air inlet, and the diameter of the ventilation hole is smaller than the diameter of the air inlet.

[0007] Preferably, the end of the burner away from the air inlet is a combustion panel, the burner also includes an ignition device, one of the two outer rows of air inlets is provided with a baffle plate, and the ignition device is located on the combustion panel on the side with the baffle plate.

[0008] Preferably, the diameter of the ventilation hole in the middle of the wind deflector is smaller than the diameter of the ventilation holes on both sides of the wind deflector.

[0009] Preferably, the ignition device is located in the middle of one side of the combustion panel.

[0010] Preferably, the mixed gas control device includes a gas distribution rod, which is disposed at the air inlet of the burner, and the gas distribution rod is provided with an exhaust nozzle corresponding to the air inlet of the burner, the exhaust nozzle having a different orifice size.

[0011] Preferably, the diameter of one row of exhaust nozzles on the air distribution rod is larger than the diameter of the other exhaust nozzles.

[0012] Preferably, the mixed gas control device includes a baffle plate and a gas distribution rod. The baffle plate is disposed between the gas distribution rod and the air inlet of the burner. The baffle plate is provided with a ventilation hole with a diameter smaller than that of the air inlet. The gas distribution rod is provided with exhaust nozzles corresponding to the air inlet of the burner, wherein the diameter of one row of exhaust nozzles is larger than that of the other exhaust nozzles.

[0013] To achieve the above objectives, the present invention also provides a gas water heater, the gas water heater comprising a burner as described in any of the preceding claims, the burner comprising a plurality of burners and a gas mixing control device; each burner is provided with at least three air inlets, and the plurality of burners are arranged in parallel to form at least three rows of air inlets; the gas mixing control device is disposed at the air inlet of the burner, and the gas mixing control device is used to control the ratio of air content to gas content entering the burner.

[0014] In the technical solution proposed in this invention, several burners are arranged in parallel, and each burner is provided with at least three air inlets. Multi-point air intake is used to achieve lean combustion and reduce nitrogen oxide emissions. At the same time, the mixed gas control device is located at the air inlet of the burner. The mixed gas control device is used to control the ratio of air content to fuel gas content entering the burner and appropriately increase the fuel gas concentration in the burner. This results in stable flame combustion and avoids the problem of unreliable ignition. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a front view of the burner in an embodiment of the present invention;

[0017] Figure 2 This is a left view of the burner in an embodiment of the present invention;

[0018] Figure 3This is a bottom view of the burner after the gas distribution bar has been removed in an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view of the burner from the left view direction in an embodiment of the present invention;

[0020] Figure 5 This is a diagram showing the distribution of the exhaust nozzles of the air distribution rod in an embodiment of the present invention.

[0021] Explanation of icon numbers:

[0022] label name label name 10 Fire fry 40 Ignition device 11 air inlet 41 Sensors 12 Combustion panel 42 Discharge needle 20 windshield 43 fire board 21 Ventilation holes 50 heat pipe 30 Gas distribution bar 51 Inlet 31 exhaust nozzle 52 water outlet

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0026] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0029] This invention proposes a burner.

[0030] Please see Figures 1 to 4 In this embodiment of the invention, the burner includes a plurality of burners 10 and a gas mixture control device (not shown); each burner 10 is provided with at least three air inlets 11, and the plurality of burners 10 are arranged in parallel to form at least three rows of air inlets 11; the gas mixture control device is disposed at the air inlet 11 of the burner 10, and the gas mixture control device is used to control the ratio of air content to fuel gas content entering the burner 10.

[0031] In the technical solution proposed in this invention, several burners 10 are arranged in parallel, and each burner 10 is provided with at least three air inlets 11. Multi-point air intake is used to achieve lean combustion and reduce nitrogen oxide emissions. At the same time, the mixed gas control device is located at the air inlet 11 of the burner 10. The mixed gas control device is used to control the ratio of air content to fuel gas content entering the burner 10, and appropriately increase the fuel gas concentration of the burner 10. This results in stable flame combustion and avoids the problem of unreliable ignition.

[0032] Specifically, in a preferred embodiment of the present invention, several of the burners 10 are arranged in parallel, and each burner 10 is provided with three air inlets 11 to achieve three-point air intake, resulting in low gas concentration, lean combustion, and reduced generation of nitrogen oxides.

[0033] Specifically, the mixed gas control device includes a baffle plate 20, which is provided at least one row of the air inlets 11. The baffle plate 20 is attached to the air inlets 11 of the burner 10, and the baffle plate 20 is provided with a plurality of ventilation holes 21 corresponding to the air inlets 11. In this embodiment, a baffle plate 20 is provided at one of the two outer rows of air inlets 11, and the baffle plate 20 is provided with a plurality of ventilation holes 21 corresponding to the air inlets 11. The diameter of the ventilation holes 21 is smaller than the diameter of the air inlets 11. When the gas enters the burner 10, the amount of air entering the row of air inlets 10 with the baffle plate 20 will decrease, and the gas concentration in that row of burners 10 will increase accordingly. This has the effect of stabilizing the flame during combustion and preventing flame lift-off.

[0034] For details, please refer to the following again. Figure 1 and Figure 2The burner 10 has a combustion panel 12 at the end opposite to the air inlet 11. The burner also includes an ignition device 40, which is located on the side of the combustion panel 12 opposite to the wind deflector 20. By placing the ignition device 40 on the side with the wind deflector 20, the gas concentration on this side of the burner 10 is slightly higher than in other areas, thus preventing deflagration during ignition.

[0035] Specifically, the ignition device 40 includes a sensor 41, a discharge needle 42, and an ignition plate 43. The sensor 41 is used to detect the gas concentration. When the gas concentration reaches the ignition standard, the sensor 41 transmits the information to the ignition device 40, and the ignition needle discharges to the ignition plate 43, igniting the gas. Since the sensor 41 is located at the row of burners 10 with high gas concentration, its ignition and sensing effects are better, thereby avoiding ignition deflagration and flameout, and improving the performance of the burner.

[0036] In one specific embodiment, each of the fire racks 10 is provided with three air inlets 11, and fifteen fire racks 10 are arranged in parallel to form a row with fifteen air inlets 11, for a total of three rows. The wind baffle 20 is provided with fifteen ventilation holes 21. The diameter of the ventilation hole 21 in the middle of the wind baffle 20 is smaller than the diameter of the ventilation holes 21 on both sides of the wind baffle 20. The fifteen ventilation holes 21 are symmetrically arranged with the central ventilation hole 21 as the center. The diameter of the central ventilation hole 21 is 10.5 mm, the diameter of the two adjacent ventilation holes 21 is 12 mm, and the diameter of the other ventilation holes 21 is 14.6 mm. The ignition device 40 is located in the middle of one side of the combustion panel 12. The ventilation hole 21 in the middle and the ignition device 40 are respectively located at the upper and lower ends of the burner 10. Since the diameter of the three ventilation holes 21 in the middle of the baffle plate 20 is slightly smaller than that of the other ventilation holes 21, the gas concentration at the ignition device 40 is higher, and the ignition and sensing effect of the ignition device 40 will be better.

[0037] Specifically, please refer to the following: Figure 5In other embodiments, the mixed gas control device includes a gas distribution rod 30, which is disposed at the air inlet 11 of the burner 10. The gas distribution rod 30 is provided with exhaust nozzles 31 corresponding to the air inlets 11 of the burner 10, and the diameters of the exhaust nozzles 31 are different. One row of exhaust nozzles 31 on the gas distribution rod 30 has a larger diameter than the other exhaust nozzles 31. During use, the gas is first dispersed through the gas distribution rod 30, and then enters the burner 10 point-to-point through the air inlets 11 via the exhaust nozzles 31. Preferably, the exhaust nozzles 31 correspond to three rows of air inlets 11, with the middle row having an diameter of 0.76 mm and the other two rows having diameters of 0.69 mm. The gas output of the middle row of exhaust nozzles 31 is higher than that of the two sides. This changes the entire lean combustion to a row of appropriately rich combustion designs, which improves the stability of the flame and the performance of ignition and induction. It avoids the occurrence of ignition deflagration during use, which can improve user satisfaction and also improve the adaptability of the burner.

[0038] Specifically, the burner also includes a heat-conducting pipe 50, which traverses the gaps between the plurality of burner bars 10 and is arranged in a back-and-forth bending pattern. This back-and-forth bending structure allows the heat-conducting pipe 50 to fully contact the heat dissipation surface of the burner bars 10, maximizing the utilization of the heat generated by the combustion of the burner bars 10. Both ends of the heat-conducting pipe 50 are connected to a water system. In use, one end of the heat-conducting pipe 50 is connected to a water inlet 51, and the other end is connected to a water outlet 52. As water flows through the heat-conducting pipe 50, the combustion of the burner bars 10 heats the heat-conducting pipe 50, producing hot water.

[0039] Specifically, in another embodiment, the mixed gas control device includes a baffle plate 20 and a gas distribution rod 30. The baffle plate 20 is disposed between the gas distribution rod 30 and the air inlet 11 of the burner 10. The baffle plate 20 is provided with a ventilation hole 21 with a diameter smaller than that of the air inlet 11. The gas distribution rod 30 is provided with an exhaust nozzle 31 corresponding to the air inlet 11 of the burner 10, wherein the diameter of one row of exhaust nozzles 31 is larger than that of the other exhaust nozzles 31.

[0040] The present invention also proposes a gas water heater, which includes a burner as described in any of the above embodiments. The specific structure of the burner is as described in the above embodiments. Since this gas water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A burner, characterized in that, It includes several burners and a mixed gas control device; each burner is provided with at least three air inlets, and the several burners are arranged in parallel to form at least three rows of air inlets; The mixed gas control device includes a baffle plate and a gas distribution rod. A baffle plate is provided at one of the two rows of air inlets on the outer side. The baffle plate is provided with a number of ventilation holes corresponding to the air inlets. The diameter of the ventilation holes is smaller than the diameter of the air inlets. The diameter of the ventilation holes in the middle of the baffle plate is smaller than the diameter of the ventilation holes on both sides of the baffle plate. The ventilation holes are used to control the amount of air entering the air inlets. The gas distribution rod is installed at the air inlet of the burner, and the gas distribution rod is provided with exhaust nozzles corresponding to the air inlet of the burner. The diameter of the exhaust nozzles is different. The diameter of the exhaust nozzles in the middle row of the gas distribution rod is larger than that of the other exhaust nozzles, so that the gas output of the middle row of exhaust nozzles is higher than that of the two sides. The end of the burner away from the air inlet is a combustion panel. The burner also includes an ignition device, which is located on the side of the combustion panel with the baffle plate. The ventilation hole in the middle of the baffle plate and the ignition device are located at opposite ends of the burner.

2. The burner as claimed in claim 1, characterized in that, The wind deflector is fitted to the air inlet.

3. The burner as described in claim 1, characterized in that, The ignition device is located in the middle of one side of the combustion panel.

4. The burner as claimed in claim 1, characterized in that, The baffle plate is located between the air distribution rod and the air inlet of the fire bar.

5. A gas-fired water heater, characterized in that, The gas water heater includes a burner as described in any one of claims 1-4.

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