Fire grate, burner and gas water heater

Abstract

The invention discloses a fire grate, a burner and a gas water heater. An injection opening and a plurality of main fire holes are formed in the fire grate, an air supply channel and a combustion channel are further formed in the fire grate, the main fire holes are communicated with the combustion channel, the injection opening is communicated with the air supply channel, and the injection opening is communicated with the main fire holes through the air supply channel and the combustion channel in sequence. The two ends of the fire row are each provided with a combustion protruding part, the combustion protruding parts extend towards the outer side of the fire row in the air outlet direction of the main fire holes, and combustion holes are formed in the combustion protruding parts. The multiple main fire holes are located between the combustion protruding parts at the two ends of the fire row. The purpose of improving the use safety and reliability of the combustor is achieved, and the use safety and reliability of the combustor are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a fire grate, a burner and a gas water heater. BACKGROUND

[0002] At present, water heaters are commonly used household appliances in people's daily life. The water heaters include gas water heaters and electric water heaters, etc. Among them, the gas water heaters are widely used due to their convenient use. A conventional gas water heater usually includes a fan, a burner, a combustion chamber and a heat exchanger, etc. The burner burns gas in the combustion chamber to heat water flowing through the heat exchanger.

[0003] The burner is an important component of the gas water heater. Chinese Patent No. CN 218095940 U discloses a fire grate, a burner and a gas water heater. In order to reduce the phenomenon of local load concentration, a pressure type is arranged at the corner portion of the gas supply channel to block too much gas from flowing from the corner position to the fire hole output at the end of the fire grate.

[0004] However, in actual use, the flames generated by the fire holes at both ends of the fire grate are easily affected by the flames generated by the inner fire holes and inclined to spread towards the outside, which causes the wall surface of the combustion chamber of the burner to be baked, so that the wall surface temperature is too high and even burns through the wall surface, resulting in poor use safety and reliability. In view of this, how to design a technology to improve the use safety and reliability of the burner is a technical problem to be solved by the present application. SUMMARY

[0005] The present application provides a fire grate, a burner and a gas water heater, which can improve the use safety and reliability of the burner.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme: In one aspect, the present application provides a fire grate, which is provided with an injection port and a plurality of main fire holes. The inside of the fire grate is further provided with a gas supply channel and a combustion channel. The main fire holes are in communication with the combustion channel. The injection port is in communication with the gas supply channel. The injection port is in communication with the main fire holes through the gas supply channel and the combustion channel in sequence. Both ends of the fire grate are respectively provided with a combustion protruding portion. The combustion protruding portion extends towards the outside of the fire grate along the gas outlet direction of the main fire hole. The combustion protruding portion is provided with a combustion hole. Among them, a plurality of main fire holes are located between the combustion protruding portions at both ends of the fire grate.

[0007] In an embodiment of the present application, both ends of the fire grate are respectively provided with a flange hole. The flange of the flange hole extends towards the outside of the fire grate along the gas outlet direction of the main fire hole. The flange hole is the combustion protruding portion.

[0008] In an embodiment of the present application, the fire row is provided with a plurality of the combustion protrusions at two ends thereof.

[0009] In an embodiment of the present application, the gas outlet area of the combustion hole is not less than the gas outlet area of the main fire hole.

[0010] In an embodiment of the present application, the gas supply passage has an air inlet section, a curved section and a distribution section connected in sequence, the injection port is communicated with the air inlet section, the interior of the fire row is further provided with a first throttling protrusion and a second throttling protrusion, the first throttling protrusion is arranged outside the curved section, and the second throttling protrusion is arranged outside the first throttling protrusion and extends along the length direction of the distribution section.

[0011] In an embodiment of the present application, the interior of the fire row is provided with a shunt chamber outside the curved section, and the shunt chamber is communicated with the curved section of the gas supply passage. The first throttling protrusion is arranged at a position where the shunt chamber is communicated with the curved section of the gas supply passage, and the second throttling protrusion is arranged in a strip structure and transversely arranged in the shunt chamber.

[0012] In an embodiment of the present application, the fire row is further provided with a gradually widening passage, the combustion passage, the gradually widening passage and the distribution section all extend along the length direction of the fire row, the combustion passage and the gradually widening passage are arranged side by side and communicated with each other, the shunt chamber and the distribution section are respectively communicated with the gradually widening passage, and the gradually widening passage gradually widens along the direction of the airflow entering the combustion passage.

[0013] In an embodiment of the present application, the two side walls of the fire row are respectively provided with a plurality of auxiliary fire holes, and the plurality of auxiliary fire holes are arranged in sequence along the length direction of the fire row and respectively communicated with the combustion passage. The two side walls of the fire row are respectively provided with a flame stabilizing shell, a flame stabilizing flow channel is formed between the flame stabilizing shell and the fire row, and the flame stabilizing shell covers the outside of the auxiliary fire hole.

[0014] On the other hand, an embodiment of the present application further provides a burner, which comprises a shell and a plurality of fire rows, the fire row adopts the above fire row, and the plurality of fire rows are arranged side by side and arranged in the shell.

[0015] In an embodiment of the present application, one side wall of the shell is provided with a plurality of first ventilation openings, the plurality of first ventilation openings are arranged side by side, and the lower part of the shell is further provided with at least one second ventilation opening. The secondary air channel is formed between two adjacent fire rows, the injection section of the fire row is connected with the corresponding first air vent, the fire row is arranged above the second air vent, and the secondary air channel communicates with the second air vent.

[0016] In an embodiment of the present application, the shell comprises a surrounding wall and a bottom plate, the first air vent is arranged on a side wall of the surrounding wall, and positioning ribs are arranged on the inner surface of the surrounding wall around the outer periphery of the first air vent; The second air vent is arranged on the bottom plate, the bottom plate is arranged at the bottom of the surrounding wall, and a plurality of mounting clamping grooves are arranged on the bottom plate and arranged opposite to the corresponding positioning ribs; The injection port of the fire row is connected with the corresponding positioning rib, and the fire row is clamped in the corresponding mounting clamping groove.

[0017] In another aspect, an embodiment of the present application also provides a gas water heater, comprising a shell and the above-mentioned burner, wherein the burner is located in the shell.

[0018] By arranging the combustion protruding portions at both ends of the fire row, the combustion protruding portions are higher than the main fire holes on the fire row, and the combustion holes are arranged on the combustion protruding portions. In use, the flame root generated by the main fire holes is lower than the flame root generated by the combustion holes, so that the flame generated by the combustion holes is not affected by the flame generated by the adjacent main fire holes. After the flame of the combustion hole is shaped, the verticality of the flame of the combustion hole is high and will not expand towards the outside of the end of the fire row, thereby playing a rectifying role on the flame generated by the adjacent main fire hole of the fire row, converging the flame shape of the fire row, and making the flame away from the wall surface of the burner, thereby reducing the temperature of the wall surface of the burner, and improving the use safety and reliability of the burner. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 Structure schematic view of one embodiment of the fire row of the present application; Figure 2 Structure schematic view of another embodiment of the fire row of the present application; Figure 3 Local structure schematic view of one embodiment of the fire row of the present application; Figure 4 Cross-sectional view of one embodiment of the fire row of the present application; Figure 5 This is a second cross-sectional view of an embodiment of the fire extinguisher of the present invention; Figure 6 This is a schematic diagram of the flame stabilizer shell in one embodiment of the firebox of the present invention; Figure 7 This is one of the flame simulation diagrams of the firebox of the present invention; Figure 8 This is the second simulation diagram of the flame of the firebox of the present invention; Figure 9 This is a simulation diagram of the airflow distribution of the firebox in this invention; Figure 10 This is a simulation diagram of the flame of a firebox in the existing technology; Figure 11 This is a simulation diagram of the airflow distribution in the firebox of the prior art; Figure 12 This is one of the structural schematic diagrams of an embodiment of the burner of the present invention; Figure 13 This is a second schematic diagram of the structure of an embodiment of the burner of the present invention; Figure 14 This is the third structural schematic diagram of an embodiment of the burner of the present invention; Figure 15 for Figure 12 Schematic diagram of the structure of the first mounting plate; Figure 16 for Figure 12 Schematic diagram of the structure of the second mounting plate; Figure 17 for Figure 12 Schematic diagram of the inner lining plate; Figure 18 This is one of the assembly diagrams of the burner and the outer casing in an embodiment of the burner of the present invention; Figure 19 This is the second assembly diagram of the burner and the outer shell in an embodiment of the burner of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0026] The gas water heater is a water heater that uses gas as the main energy material, and transfers the high-temperature heat generated by gas combustion to the cold water flowing through the heat exchanger to achieve the purpose of preparing hot water.

[0027] The gas water heater generally comprises a shell, and components such as a burner, a heat exchanger, a fan and a fan cover arranged in the shell.

[0028] The gas is delivered to the burner, ignited by an ignition device, and burned by the burner to generate heat.

[0029] The heat exchanger is provided with heat exchange tubes, one end of the heat exchange tubes is communicated with a water supply pipeline, and the other end of the heat exchange tubes is communicated with a shower or a faucet.

[0030] The heat generated by the burning of the gas by the burner is used to heat the heat exchange tubes, so that the water in the heat exchange tubes is heated to form hot water.

[0031] When the gas water heater is working, cold water provided by the water supply pipeline flows into the heat exchange tubes, and is heated by the heat source generated by the burner to become hot water, which is then discharged from the shower or the faucet through the hot water valve for use by the user.

[0032] At the same time, during the working of the gas water heater, the fan is powered on and runs at the same time, and under the action of the fan, the flue gas generated by the burner is discharged to the outside.

[0033] As shown in Figures 1-6 An embodiment of the present application provides a fire grate 11, which generally has an injection port 11 and a plurality of main fire holes 12, and the inside of the fire grate 1 is further provided with a gas supply passage 13, a combustion passage 14 and a shunt chamber 16. The gas supply passage 13 has an air inlet section 131, a curved section 132 and a distribution section 133 connected in sequence. The injection port 11 is communicated with the air inlet section 131, and a plurality of main fire holes 12 are arranged side by side along the length direction of the distribution section 133. The shunt chamber 16 is communicated with the curved section 132, and the distribution section 133 and the shunt chamber 16 are respectively communicated with the combustion passage 14. Optionally, the inside of the fire grate 1 is further provided with a gradually widened passage 15, and the distribution section 133 and the shunt chamber 16 are respectively communicated with the combustion passage 14 through the gradually widened passage 15.

[0034] During use, the gas and air enter the air inlet section 131 through the injection port 11, and when the airflow flows through the curved section 132, part of the airflow changes the flow direction and flows into the distribution section 133, and part of the airflow will flow to the shunt chamber 16 outside the curved section 132 by inertia.

[0035] Embodiment one, in order to reduce the technical problem of uneven distribution of gas caused by airflow impact of the curved section 132, at least the following structural improvements are made to the fire grate 1.

[0036] The interior of the fire row 1 is further provided with a first throttling protrusion 161 and a second throttling protrusion 162 in the distribution chamber 16, the first throttling protrusion is arranged outside the curved section 132, and the second throttling protrusion is arranged outside the first throttling protrusion and extends along the length direction of the distribution section 133.

[0037] Specifically, the first throttling protrusion is adjacent to the curved section 132 and located outside the curved section 132. After the gas flow enters the curved section 132, the gas flow flowing to the distribution chamber 16 can be effectively prevented from entering the distribution chamber 16 in excess due to the throttling effect of the first throttling protrusion. The gas flow entering the distribution chamber 16 will further pass through the throttling effect of the second throttling protrusion during the process of flowing to the combustion channel 14, so that the gas flow is more evenly dispersed from the distribution chamber 16.

[0038] More importantly, the first throttling protrusion 161 is transversely arranged in the distribution chamber 16, which can further block the gas flow entering the distribution chamber 16 to reduce the formation of vortex in the distribution chamber 16. Figure 11 As shown in the conventional technology, Figure 11 a vortex with a large range is formed in the C area in the distribution chamber 16; and Figure 9 the vortex range formed in the B area in the distribution chamber 16 of the present application is greatly reduced.

[0039] In an embodiment, the first throttling protrusion is arc-shaped and curvedly extends along the bending direction of the curved section 132.

[0040] Specifically, for the first throttling protrusion, since it is arranged outside the curved section 132, the first throttling protrusion is designed to follow the shape of the curved section 132. On the one hand, the first throttling protrusion can play a throttling role, and on the other hand, the first throttling protrusion can further guide the gas flow to flow into the distribution section 133, which is more conducive to improving the uniformity of gas distribution.

[0041] In another embodiment, the interior of the fire row 1 is provided with the distribution chamber 16 outside the curved section 132, the distribution chamber 16 communicates with the curved section 132 of the gas supply channel 13. And the first throttling protrusion is arranged at the part where the distribution chamber 16 communicates with the curved section 132 of the gas supply channel 13.

[0042] Specifically, the first throttling protrusion is arranged at the connecting part of the distribution chamber 16 and the curved section 132 to maximize the throttling effect and ensure the uniformity of gas distribution to improve the combustion sufficiency.

[0043] In some embodiments, the second throttling protrusion is in a strip structure and is transversely arranged in the distribution chamber 16.

[0044] Specifically, for the second throttle protrusion, the throttle of the second throttle protrusion does not need to be too large, and only needs to play a role in uniformly dispersing the airflow in the distribution chamber 16. To this end, the second throttle protrusion is in a strip-shaped structure, so that the width of the second throttle protrusion is small and the length is increased. In this way, the airflow entering the distribution chamber 16 can be more uniformly dispersed.

[0045] In some embodiments, the combustion channel 14, the gradually widened channel 15, and the distribution section 133 all extend along the length direction of the fire grate 1, the combustion channel 14 and the gradually widened channel 15 are arranged side by side and communicate with each other, the distribution chamber 16 and the distribution section 133 respectively communicate with the gradually widened channel 15, and the gradually widened channel 15 gradually widens in the direction of the airflow entering the combustion channel 14.

[0046] In Embodiment Two, in order to reduce the influence of the flame at both ends of the fire grate 1 spreading towards the outside of the end portion and causing overheating damage to the wall surface of the burner, at least the following structural improvements are made to the fire grate 1.

[0047] The fire grate 1 is respectively provided with a combustion protruding portion 17 at both ends thereof, the combustion protruding portion 17 extends towards the outside of the fire grate 1 in the gas outlet direction of the main fire hole 12, and the combustion protruding portion 17 is provided with a combustion hole 171; Among them, a plurality of main fire holes 12 are located between the combustion protruding portions 17 at both ends of the fire grate 1.

[0048] Specifically, a plurality of main fire holes 12 are arranged in sequence along the length direction of the fire grate 1 on the upper surface of the fire grate 1, and a combustion protruding portion 17 protruding above the upper surface of the fire grate 1 is additionally provided outside the main fire hole 12 at the end portion of the fire grate 1. The combustion hole 171 provided on the combustion protruding portion 17 also communicates with the combustion channel 14.

[0049] In use, the mixed gas of fuel gas and air will be output from the main fire hole 12 and the combustion hole 171 at both ends and ignited to burn. Since the root of the flame generated by the combustion hole 171 is higher than the root of the flame generated by the main fire hole 12, the flame generated by the combustion hole 171 is less affected by the flame generated by the main fire hole 12 adjacent to the combustion hole 171, thereby ensuring that the flame generated by the combustion hole 171 can burn in a direction substantially perpendicular to the upper surface of the fire grate 1, and the flame generated by the combustion hole 171 will not spread towards the outside of the end portion of the fire grate 1, thereby effectively reducing the flame roasting the side wall of the burner.

[0050] In the actual design process, since the verticality of the flame forming has a slight effect on the heating of the side wall of the burner, the number of cooling holes on the wall of the combustion chamber can be reduced, and the cooling air can be reduced. For the updraft machine type, the cooling hole is reduced, the machine sealing is increased, and the air that should be used for cooling is involved in the combustion, which further reduces the combustion pollution.

[0051] Reference Figure 10 As shown in the conventional technology Figure 10 The flame at both ends of the fire row 1 is easy to expand outwardly from the end of the fire row 1, and the flame of the main fire hole 12 corresponding to the bending section 132 is high, which causes the problem of excessive heating of the side wall of the burner and uneven combustion distribution. And Figure 7 And Figure 8 As shown in the fire row 1 in the present application, the flame is generated by burning the combustion hole 171 formed by the combustion protruding part 17 at the end, and the flame formed by the combustion hole 171 (refer to the A area in Figure 8 The verticality of the flame forming has a slight effect on the heating of the side wall of the burner.

[0052] In another embodiment of the present application, the two ends of the fire row 1 are respectively provided with a flange hole, and the flange of the flange hole extends outwardly from the air outlet direction of the main fire hole 12. The flange hole is the combustion protruding part 17.

[0053] Specifically, in order to facilitate the processing of the combustion protruding part 17, the flange hole can be formed by stamping the upper surface of the fire row 1 during the processing of the fire row 1. The flange of the flange hole will extend upwards from the upper surface of the fire row 1. In this way, the combustion protruding part 17 and the corresponding combustion hole 171 can be formed.

[0054] In another embodiment, a plurality of combustion protruding parts 17 can be provided at the two ends of the fire row 1 as needed.

[0055] Specifically, by providing a plurality of combustion protruding parts 17 at the end of the fire row 1, the flame output by the combustion hole 171 at the end of the fire row 1 can be vertically upward and have sufficient width to resist the influence of the flame adjacent to the main fire hole 12, so as to reduce the expansion of the flame of the fire row 1 to the outside of the end.

[0056] In some embodiments, for the combustion hole 171, in order to make the flame formed by the combustion hole 171 have better impact resistance, the air outlet area of the combustion hole 171 is not less than the air outlet area of the main fire hole 12.

[0057] Specifically, the air outlet area of the air flow of the combustion hole 171 is designed to be slightly larger, on the one hand, to ensure that sufficient air flow is output from the combustion hole 171 to obtain a more stable flame shape, and on the other hand, to increase the air outlet area of the combustion hole 171, so that the air flow can be more smoothly output from both ends, thereby solving the problem of uneven air flow distribution at the ends and improving the uniformity of air flow distribution at different positions of the fire grate 1.

[0058] In order to reduce the situation of insufficient gas combustion and unstable flame, at least the following structural improvements are made to the fire grate 1 in Embodiment Three.

[0059] The two side walls of the fire grate 1 are respectively provided with a flame stabilizing shell 19, and a flame stabilizing flow channel is formed between the flame stabilizing shell 19 and the fire grate 1. The flame stabilizing shell 19 covers the outside of the auxiliary fire hole 18. The inner surface of the flame stabilizing shell 19 is provided with a positioning protrusion 191, which abuts against the side wall of the fire grate 1.

[0060] Specifically, the top of the fire grate 1 is provided with a flame stabilizing shell 19 on both sides, and the flame stabilizing shell 19 can form a flame stabilizing flow channel with the side wall of the fire grate 1. The auxiliary fire hole 18 provided on both sides of the fire grate 1 is covered by the flame stabilizing shell 19, and the air flow output from the auxiliary fire hole 18 is output upward from the flame stabilizing flow channel to cooperate with the flame formed by the main fire hole 12 for combustion.

[0061] The positioning protrusion 191 on the flame stabilizing shell 19 abuts against the side wall of the fire grate 1, and the protruding size of the positioning protrusion 191 is used to effectively and accurately control the width of the flame stabilizing flow channel, thereby ensuring that the widths of the flame stabilizing flow channels on both sides of the fire grate 1 are consistent, improving the fullness of gas combustion, and ensuring the stability of the flame shape. The design of the positioning protrusion 191 can ensure that the size of the single-side flame stabilizing flow channel meets the design requirements of the drawing, and the size of the symmetrical flame stabilizing flow channels on both sides meets the design requirements of the drawing. In some embodiments, the inner surface of the flame stabilizing shell 19 is provided with a plurality of positioning protrusions 191, and the plurality of positioning protrusions 191 are arranged side by side along the length direction of the fire grate 1.

[0062] Specifically, for the flame stabilizing shell 19, the inner wall is provided with a plurality of positioning protrusions 191 along the length direction of the fire grate 1, and the plurality of positioning protrusions 191 can ensure that the width of the flame stabilizing flow channel in the length direction of the fire grate 1 is consistent.

[0063] The airflow output from the flame stabilizer channel also forms a flame above it, which, in conjunction with the main flame formed by the main flame hole, ensures more complete and stable combustion. This allows flame purifier 1 to achieve a higher combustion load, significantly increasing its TDR (maximum load / minimum load). Flame purifier 1 is highly versatile and can be adapted to different models and altitude environments.

[0064] In some embodiments, a plurality of connecting ribs 192 are provided between the two flame stabilizers 19, and the connecting ribs 192 are located between two adjacent main fire holes 12.

[0065] Specifically, the flame stabilizing shells 19 on both sides of the fire rack 1 are connected by multiple connecting ribs 192, so that the two flame stabilizing shells 19 are assembled onto the fire rack 1 as a whole, which facilitates processing and production.

[0066] In another embodiment, flame-transmitting plates 193 are provided at both ends of the flame-stabilizing shell 19, and the flame-transmitting plates 193 are bent toward the outside of the flame-stabilizing shell 19.

[0067] Specifically, gas water heaters are used in various scenarios, and users have different water temperature and flow requirements. Therefore, the number of burners (Burner 1) in a gas water heater varies, with each scenario corresponding to a different combustion segment. To meet the diverse needs of users in various scenarios, gas water heaters need to quickly switch between combustion segments. Therefore, the rapid ignition transfer performance between each Burner 1 is crucial.

[0068] By providing flame-transfer plates 193 at both ends of the flame stabilizer shell 19, the flame-transfer plates 193 have a narrower area that does not need to be too large, and flame transmission can be achieved through the flame-transfer plates 193 at the ends. On the other hand, the flame-transfer plates 193 are located on one side of the combustion hole 171, and the combustion hole 171 can generate a stable flame shape to meet the needs of rapid and stable flame transmission between two adjacent fire rows 1 through the flame-transfer plates 193. In addition, the number of flame-transfer plates 193 is small and their area is small, resulting in minimal interference with the airflow on both sides of the fire row 1 and minimal impact on combustion.

[0069] Example 4: Based on Examples 1 to 3 above, this application also provides a burner that can adopt the burner structure configuration of Examples 1, 2, and / or 3. The following improvements are made to the burner installation structure, primary air, and secondary air design.

[0070] like Figures 12-19 As shown in one embodiment of this application, a burner is provided, including: a housing 2 and a plurality of burner bars 1, wherein the plurality of burner bars 1 are arranged side by side and disposed in the housing 2, and the burner bars 1 have an ejector section for introducing fuel gas and primary air for combustion.

[0071] In order to improve the distribution of secondary air of the fire row 1, to ensure that the gas and air are mixed uniformly at each position of the fire row 1, and to improve the fullness of gas combustion, the following structural improvements are made to the shell 2 and the fire row 1.

[0072] A plurality of first air vents 201 are arranged on a side wall of the shell 2, and the first air vents 201 are arranged side by side. At least one second air vent 202 is arranged on the lower part of the shell 2. A secondary air channel is formed between two adjacent fire rows 1. The injection section of the fire row 1 is connected to the corresponding first air vent 201. The fire row 1 is arranged above the second air vent 202, and the secondary air channel is in communication with the second air vent 202.

[0073] Specifically, after the fire row 1 is installed in the shell 2, the injection port of the injection section of the fire row 1 is connected to the first air vent 201 on the shell 2, and the gas mixed with primary air enters the injection port through the first air vent. After the gas and primary air are mixed in the fire row 1 and output from the gas outlet of the fire row 1, the secondary air is introduced into the shell 2 through the second air vent 202 arranged on the bottom of the shell 2. The second air vent 202 is arranged on the bottom of the shell 2, and the opening design of the second air vent 202 can be easily adjusted according to the demand of the secondary air at different positions of the fire row 1, so that the secondary air can be more uniformly distributed at the gas outlets of the fire row 1 at different positions, and the gas and secondary air can be fully mixed, thereby improving the combustion efficiency.

[0074] After the secondary air enters the shell 2 through the second air vent 202, it enters the secondary air channel formed between the fire rows 1, and the secondary air flows along the secondary air channel to the gas outlet of the fire row 1.

[0075] In some embodiments, the bottom of the shell 2 forms a bent surface, and the bent surface matches the lower profile of the fire row 1. The second air vent 202 is arranged on the bent surface.

[0076] Specifically, for the fire row 1, the top is generally flat due to the arrangement of the gas outlet, and the bottom has a height difference due to the profile design. Therefore, in order to ensure that the air flow entering the shell 2 through different second air vents 202 can quickly enter the corresponding part of the secondary air channel, the bottom of the shell 2 is designed as a bent surface, so that the bent surface matches the bottom profile of the fire row 1, thereby reducing the large gap space formed at the bottom of the fire row 1 and affecting the air intake of the secondary air channel.

[0077] In an embodiment, the bottom of the fire row 1 forms an extension 101 extending downward, and the extension 101 forms the injection section. The end of the fire row 1 away from the ejector port of the ejector section and the extension 101 form a first lap portion 102; The bending surface has a first mounting surface 203 and a second mounting surface 204, the first mounting surface 203 is higher than the second mounting surface 204, the second air vent 202 includes a first sub-air vent 2021 and a second sub-air vent 2022, the first sub-air vent 2021 is formed on the first mounting surface 203, and the second sub-air vent 2022 is formed on the second mounting surface 204. The third lap portion is arranged above the third mounting surface 205.

[0078] Specifically, the fire row 1 is provided with an extension 101 at the bottom to form an ejector section due to the requirements of the profiled structure design. At this time, the end of the fire row 1 away from the ejector port is extended to the extension 101 to form a first lap portion 102. The part of the secondary air duct in the area between the two first lap portions 102 of the two adjacent fire rows 1 is arranged to form a first mounting surface 203 on the bending surface to tightly adhere to the bottom of the first lap portion 102, so that the installation requirements can be met, and the secondary air introduced by the first sub-air vent 2021 on the first mounting surface 203 can directly enter the secondary air duct where the first lap portion 102 is located, so as to ensure sufficient secondary air supply.

[0079] In another embodiment, the fire row 1 forms a second lap portion 103 between the end adjacent to the ejector port of the ejector section and the extension 101; The second mounting plate 22 has a third mounting surface 205, the third mounting surface 205 is higher than the second mounting surface 204, and the second mounting surface 204 is located between the first mounting surface 203 and the third mounting surface 205; The second air vent 202 includes a third sub-air vent 2023, and the third sub-air vent 2023 is formed on the third mounting surface 205; The third lap portion is arranged above the third mounting surface 205.

[0080] Specifically, the second lap portion 103 is formed at the end of the fire row 1 close to the injection section for installation, and the second lap portion 103 is lapped on the third mounting surface 205. At the same time, in order to meet the requirement of sufficient secondary air supply at the second lap portion 103, the third mounting surface 205 is further provided with a third sub-air port 2023, which is located at the bottom of the second lap portion 103, so that the secondary air introduced by the third sub-air port 2023 can directly enter the secondary air duct. In this way, sufficient secondary air supply can be obtained at each position of the fire row 1, so as to improve the uniformity of gas and air mixing, and further improve the full combustion of gas.

[0081] In some embodiments, the first mounting surface 203 is provided with a plurality of first sub-air ports 2021 arranged side by side, so as to supply secondary air through the plurality of first sub-air ports 2021 uniformly distributed at the bottom of each fire row 1. Among them, the first sub-air port 2021 can be designed as a strip-shaped hole, which extends along the length direction of the fire row 1 and is located at one side of the fire row 1.

[0082] In some embodiments, the second mounting surface 204 is provided with a plurality of second sub-air ports 2022 arranged side by side, and the second sub-air port 2022 is a strip-shaped hole, which extends along the length direction of the fire row 1. Specifically, the second sub-air port 2022 can be multiple, and the second sub-air port 2022 also extends along the length direction of the fire row 1.

[0083] Alternatively, the second mounting surface 204 is provided with at least one second sub-air port 2022, which extends along the length direction perpendicular to the fire row 1. Specifically, the second sub-air port 2022 can be one and occupy enough space on the second mounting surface 204 to meet the secondary air inlet requirement of a large area range at the bottom of the fire row 1.

[0084] In some embodiments, the third mounting surface 205 is provided with a plurality of third sub-air ports 2023 arranged side by side, so as to supply secondary air through the plurality of third sub-air ports 2023 uniformly distributed at the bottom of each fire row 1. Among them, the third sub-air port 2023 can be designed as a strip-shaped hole, which extends along the length direction of the fire row 1.

[0085] By arranging the second air port 202 at the bottom of the shell 2, the second air port 202 arranged at the bottom of the fire row 1 can be distributed according to the requirement of secondary ventilation, so as to ensure uniform distribution of secondary air at different positions of the fire row 1 during use, so as to improve the uniformity of gas and air mixing and improve the full combustion of gas.

[0086] As Figures 12-19 shown, for the fire row 1, it needs multiple fire rows 1 to be assembled into the shell 2 side by side, in order to reduce the use of parts, reduce the manufacturing cost and improve the assembly efficiency, the shell 2 and the fire row 1 are improved as follows.

[0087] The shell 2 includes a surrounding and a bottom plate 23, a plurality of first air vents 201 are arranged on the side wall of the surrounding, and positioning ribs 206 are arranged on the inner surface of the surrounding around the outer periphery of the first air vent 201; the bottom plate 23 is arranged at the bottom of the surrounding, and a plurality of mounting clamping grooves 207 are arranged on the bottom plate 23, and the mounting clamping grooves 207 are arranged opposite to the corresponding positioning ribs 206. A plurality of fire rows 1 are arranged side by side and arranged in the shell 2, the injection port of the injection section of the fire row 1 is connected with the corresponding positioning rib 206, and the fire row 1 is clamped in the corresponding mounting clamping groove 207.

[0088] The positioning rib 206 is in a ring structure, and the positioning rib 206 is inserted into the injection port.

[0089] Specifically, in the assembly process, the injection ports of multiple fire rows 1 are docked together with the positioning ribs 206 to position the injection ports of the fire rows 1 by the positioning ribs 206, and then the end of the fire row 1 away from the positioning rib 206 is clamped in the positioning clamping groove 208, so that the fire row 1 can be installed only by the assembly structure in the shell 2, and then an independent mounting rack is not needed to install the fire row 1, thereby reducing the number of parts and improving the assembly efficiency.

[0090] In some embodiments, the surrounding includes a first mounting plate 21 and a second mounting plate 22, the first mounting plate 21 is in a U-shaped structure in cross section, the second mounting plate 22 is connected between the two end portions of the first mounting plate 21, and the bottom plate 23 is arranged at the bottom of the second mounting plate 22. The first air vent 201 and the positioning rib 206 are arranged on the second mounting plate 22.

[0091] Specifically, for the surrounding, it is a split structure, the first mounting plate 21 is in a half-enclosing structure, and the second mounting plate 22 is provided with the first air vent 201 to meet the air intake requirements of the gas and the primary air.

[0092] In another embodiment, the shell 2 further includes an inner lining plate 24, the inner lining plate 24 is arranged on the inner wall of the first mounting plate 21 and arranged outside the fire row 1. The part of the inner lining plate 24 opposite to the second mounting plate 22 is provided with a positioning part extending towards the second mounting plate 22, and the edge of the positioning part is provided with a plurality of positioning clamping grooves 208. Wherein, the fire row 1 is clamped in the corresponding positioning clamping groove 208.

[0093] Specifically, in order to reduce the heat conduction of the heat in the shell 2 when the fire row 1 is burning to the outside, an inner lining plate 24 is further arranged in the shell 2 to perform heat insulation, and an air layer is formed between the inner lining plate 24 and the shell 2 to play a role of heat insulation.

[0094] And, by further arranging the positioning clamping groove 208 on the inner lining plate 24, the positioning clamping groove 208 can position the end of the fire row 1 away from the injection port, thereby more effectively improving the installation accuracy and reliability of the fire row 1.

[0095] In some embodiments, in order to facilitate the installation of the inner lining plate 24 on the shell 2, the first mounting plate 21 is further provided with a positioning clamping tongue 211 extending inward and upward, and the lower edge of the inner lining plate 24 is clamped between the positioning clamping tongue 211 and the first mounting plate 21.

[0096] Specifically, when installing the inner lining plate 24, the inner lining plate 24 is placed on the inner side of the first mounting plate 21 and is pre-positioned and supported by the positioning clamping tongue 211, and then the upper part of the inner lining plate 24 can be fixedly connected with the first mounting plate 21 by reducing screws.

[0097] In another embodiment, the positioning ribs 206, the mounting clamping grooves 207 and the positioning clamping grooves 208 connected and matched with the same fire row 1 are arranged in sequence.

[0098] Specifically, after the fire row 1 is assembled in place, the two ends of the fire row 1 will be end-limited and fixed by the positioning ribs 206 and the positioning clamping grooves 208, and the bottom of the fire row 1 can be further supported and fixed by the mounting clamping grooves 207, so that the fire row 1 can be firmly assembled into the shell 2.

[0099] Wherein, the positioning clamping groove 208 is arranged obliquely above the mounting clamping groove 207.

[0100] In another embodiment, the bottom plate 23 is provided with a second air vent 202 to meet the requirement of supplying secondary air through the second air vent 202.

[0101] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can still be modified by those of ordinary skill in the art, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. A burner, wherein the burner is provided with an ejector port and a plurality of main burner holes, and the burner interior is further provided with a gas supply channel and a combustion channel, wherein the main burner holes are connected to the combustion channel, the ejector port is connected to the gas supply channel, and the ejector port is connected to the main burner holes sequentially through the gas supply channel and the combustion channel, characterized in that, The two ends of the burner are respectively provided with combustion protrusions, which extend outward from the burner along the gas outlet direction of the main burner hole, and combustion holes are provided on the combustion protrusions. The main fire holes are located between the combustion protrusions at both ends of the fire bar.

2. The fire grill according to claim 1, characterized in that, The burner is provided with flanged holes at both ends, and the flanges of the flanged holes extend outward from the burner along the gas outlet direction of the main burner hole; the flanged holes are the combustion protrusions.

3. The fire grill according to claim 1, characterized in that, The two ends of the fire bar are respectively provided with a plurality of combustion protrusions.

4. The fire grill according to claim 1, characterized in that, The exhaust area of ​​the combustion hole is not less than the exhaust area of ​​the main fire hole.

5. The fire rack according to any one of claims 1-4, characterized in that, The gas delivery channel has an intake section, a curved section and a distribution section connected in sequence. The ejector port is connected to the intake section. The interior of the burner is also provided with a first throttling protrusion and a second throttling protrusion. The first throttling protrusion is arranged on the outside of the curved section, and the second throttling protrusion is arranged on the outside of the first throttling protrusion and extends along the length direction of the distribution section.

6. The fire grill according to claim 5, characterized in that, The interior of the firebox has a diversion chamber located outside the curved section, and the diversion chamber is connected to the curved section of the air supply channel. The first throttling protrusion is located at the point where the flow divider chamber connects to the curved section of the air delivery channel; the second throttling protrusion has a strip-shaped structure and is arranged laterally within the flow divider chamber.

7. The fire grill according to claim 6, characterized in that, The firebox is also provided with a widening channel. The combustion channel, the widening channel and the distribution section all extend along the length of the firebox. The combustion channel and the widening channel are arranged side by side and connected to each other. The diversion chamber and the distribution section are respectively connected to the widening channel. The widening channel gradually widens along the direction in which the airflow enters the combustion channel.

8. The fire grill according to claim 1, characterized in that, The two side walls of the fire bar are respectively provided with a plurality of auxiliary fire holes, which are arranged sequentially along the length of the fire bar and are respectively connected to the combustion channel; Flame stabilizing shells are provided on both sides of the fire bar, and flame stabilizing shells and fire bar form flame stabilizing channels. The flame stabilizing shells cover the outside of the auxiliary fire holes.

9. A burner comprising a housing and a plurality of burner bars, characterized in that, The fire bar is the fire bar as described in any one of claims 1-8, and a plurality of the fire bars are arranged side by side and disposed in the housing.

10. The burner according to claim 9, characterized in that, The outer casing has a plurality of first ventilation openings on one side wall, the plurality of first ventilation openings being arranged side by side, and the lower part of the outer casing also has at least one second ventilation opening; A secondary air duct is formed between two adjacent fire bars. The ejector section of the fire bar is connected to the corresponding first ventilation opening. The fire bar is arranged above the second ventilation opening. The secondary air duct is connected to the second ventilation opening.

11. The burner according to claim 10, characterized in that, The outer shell includes a enclosure and a base plate. The first ventilation opening is provided on one side wall of the enclosure, and positioning ribs are provided on the inner surface of the enclosure around the outer perimeter of the first ventilation opening. The base plate is provided with the second ventilation opening, the base plate is located at the bottom of the enclosure, and the base plate is provided with a plurality of mounting slots, the mounting slots being arranged opposite to the corresponding positioning ribs; The ejector port of the fire bar is connected to the corresponding positioning rib, and the fire bar is also locked in the corresponding mounting slot.

12. A gas water heater, comprising a casing, characterized in that, It also includes a burner as described in any one of claims 9-11, the burner being located within the housing.

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