Fire grilles, burners and gas water heaters

Abstract

The present application belongs to the technical field of water heaters, and specifically relates to a fire grate, a burner and a gas water heater. The present application aims to solve the problem that the gap between two adjacent existing fire grates forms a secondary air channel and the secondary air uniformity is poor. The fire grate of the present application includes an inner shell, an outer shell and a partition assembly, wherein the outer shell is located on the outside of a portion of the inner shell, and there is a gap between the outer shell and the portion of the inner shell inside it to form a secondary air outlet channel; the inner shell forms a first ejection channel and a secondary air intake channel, and the secondary air intake channel and the secondary air outlet channel are connected to form a secondary air channel, providing secondary air for combustion, improving the sufficiency and uniformity of combustion, and improving the combustion effect. The partition assembly is located on the inner side of the inner shell, and there is a gap between the partition assembly and the inner shell to form an auxiliary air flow channel, and the partition assembly forms a main air flow channel, and the main air flow channel is respectively connected to the first ejection channel and the auxiliary air flow channel, and burns to form a main flame and an auxiliary flame respectively.

Description

Technical Field

[0001] The present application belongs to the technical field of water heaters, and specifically relates to a fire grate, a burner and a gas water heater. Background Art

[0002] A gas water heater is a gas appliance that uses gas as fuel and burns a mixture of air and gas in a combustion chamber through a burner to produce high-temperature flue gas. The high-temperature flue gas flows through a heat exchanger and exchanges heat with cold water in the heat exchanger to prepare hot water. It is widely used because of its convenience in use and fast hot water production.

[0003] In the related art, an atmospheric burner utilizes the gap between two adjacent fire bars as a secondary air passage, which is connected to the secondary air holes provided at the bottom of the burner to provide secondary air for combustion.

[0004] However, the gap between two adjacent fire bars forms a secondary air channel, so that the two fire bars share the air in one secondary air channel. Not only is the amount of secondary air insufficient, but the secondary air uniformity is poor, resulting in uneven and insufficient combustion, affecting work efficiency. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the gap between two adjacent fire grates forms a secondary air channel and the secondary air uniformity is poor, the present application provides a fire grate, a burner and a gas water heater.

[0006] The fire bar includes: an inner shell, a baffle assembly and an outer shell covering part of the outer shell; a gap is formed between the outer shell and part of the inner shell to form a secondary air outlet channel; the inner shell is located on the outer side of the baffle assembly, and the inner shell forms a first introduction channel and a secondary air intake channel, and the secondary air intake channel and the secondary air outlet channel are connected to form a secondary air channel; the baffle assembly forms a main air flow channel, and a gap is formed between the baffle assembly and the inner shell to form an auxiliary air flow channel, and the main air flow channel is respectively connected to the first introduction channel and the auxiliary air flow channel.

[0007] In the optional technical solution of the above-mentioned fire bar, the partition assembly includes a plurality of partitions, which are parallel and arranged in sequence along the thickness direction of the partition; at least part of the area of two adjacent partitions is spaced apart to form the main air flow channel; the two partitions on the outside of the partition assembly are defined as outer partitions, and part of the area of the outer partition is welded to the inner shell on both sides, and the auxiliary air flow channel is formed between the part of the outer partition above the welding position and the inner shell; the outer partition above the welding position is provided with a first through hole connecting the auxiliary air flow channel and the main air flow channel.

[0008] In the optional technical solution of the above-mentioned fire grate, a first welding portion is provided at the top end of the partition, and the first welding portions of all the partitions are welded to form the partition assembly; the first welding portion separates the air outlet port of the main air flow channel into at least two main flame ports.

[0009] In an optional technical solution of the above fire bar, the partition assembly has a middle plane, and the partition assembly is symmetrical about the middle plane; each of the partitions protrudes toward the middle plane to form the first welding portion.

[0010] In an optional technical solution of the above-mentioned fire bar, a second welding portion is provided at the bottom end of the outer partition, the second welding portion is welded to the partition adjacent to the inner side of the outer partition, and the second welding portion is opposite to the first welding portion.

[0011] In the optional technical solution of the above-mentioned fire bar, the bottom end of the outer partition is located above the partition adjacent to the inner side of the outer partition, the second welding portion extends downward to form a second connecting strip, the second connecting strip extends to the bottom end of the partition adjacent to the inner side of the outer partition, and the second connecting strip is welded to the partition adjacent to the inner side of the outer partition.

[0012] In an optional technical solution of the above fire bar, at least one of the two adjacent partitions protrudes toward the gap between the two partitions to form a supporting boss that abuts against each other.

[0013] In the optional technical solution of the above-mentioned fire bar, the outer shell includes two second side panels respectively located on both sides of the inner shell and a second connecting strip connected to the top ends of the two second side panels. There is a gap between part of the second side panels and the inner shell to form the secondary air outlet channel; a part of the second side panel protrudes away from the inner shell to form a mounting boss.

[0014] The burner includes: a combustion rack and the above-mentioned fire grate, the combustion rack is provided with an air inlet, a gas mixing hole and a secondary air hole, the gas mixing hole is connected to the first injection channel, the secondary air hole is connected to the secondary air intake channel, the opening direction of the gas mixing hole and the secondary air hole is the same, and the opening direction of the air inlet is different from the opening direction of the gas mixing hole.

[0015] The gas water heater comprises: a water tank, a fan and the above-mentioned burner, the water tank is installed at the top end of the burner, the fan is installed at the bottom end of the burner, and the air outlet of the fan is connected to the air inlet of the burner.

[0016] It will be understood by those skilled in the art that the fire grate, burner and gas water heater of the present application, the fire grate includes an inner shell, an outer shell and a partition assembly, wherein the outer shell is located on the outside of a portion of the inner shell, and there is a gap between the outer shell and the portion of the inner shell inside it to form a secondary air outlet channel; the inner shell forms a first ejection channel and a secondary air intake channel, and the secondary air intake channel and the secondary air outlet channel are connected to form a secondary air channel, which provides secondary air for combustion, improves the sufficiency and uniformity of combustion, and improves the combustion effect. The partition assembly is located on the inside of the inner shell, and there is a gap between the partition assembly and the inner shell to form an auxiliary air flow channel, and the partition assembly forms a main air flow channel, which is respectively connected to the first ejection channel and the auxiliary air flow channel. In this way, the mixture of primary air and gas enters the main air flow channel through the first ejection channel and burns to form a main flame; part of the mixed gas enters the auxiliary air flow channel and burns to form an auxiliary flame. The secondary air channel of the embodiment of the present application is arranged in the fire grate, which can reduce the gap between the fire grates and make the burner structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following describes the optional embodiments of the fire grate, burner and gas water heater of the present application with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the fire bar provided in an embodiment of the present application;

[0019] Figure 2 This is a front view of the fire bar provided in an embodiment of the present application;

[0020] Figure 3 yes Figure 2 AA section view in;

[0021] Figure 4 This is a schematic structural diagram of a baffle assembly of a fire bar provided in an embodiment of the present application;

[0022] Figure 5 This is an exploded view of the baffle assembly of the fire bar provided in an embodiment of the present application;

[0023] Figure 6 This is a front view of the baffle assembly of the fire bar provided in an embodiment of the present application;

[0024] Figure 7 yes Figure 6 BB cross-sectional view in;

[0025] Figure 8 yes Figure 7 Enlarged schematic diagram of the middle P region;

[0026] Figure 9 This is a schematic structural diagram of the inner shell of the fire grate provided in an embodiment of the present application;

[0027] Figure 10 This is a schematic structural diagram of a burner provided in an embodiment of the present application;

[0028] Figure 11 This is an exploded view of the burner provided in an embodiment of the present application.

[0029] In the accompanying drawings: 1000: fire bar; 100: inner shell; 110: first ejection channel; 111: first section; 112: second section; 113: third section; 114: fourth section; 115: fifth section; 120: secondary air intake channel; 121: air passage plate; 1211: second through hole; 130: first side plate; 131: first welding boss; 140: engaging opening; 150: first connecting portion; 151: abutting plane; 160: welding area; 200: outer shell; 201: secondary air outlet channel; 210: second side plate; 211: first abutting boss; 212: second abutting boss; 213: blocking rib; 214: mounting plate Mounting boss; 220: second connecting strip; 300: partition assembly; 301: main air flow channel; 302: auxiliary air flow channel; 310: inner partition; 320: outer partition; 321: first through hole; 322: second welding portion; 330: first welding portion; 331: main flame mouth; 341: first supporting boss; 342: second supporting boss; 343: third supporting boss; 350: second connecting strip; 410: combustion rack; 411: mixing hole; 412: secondary air hole; 420: combustion chamber shell; 421: air inlet; 430: air regulating plate; 431: first air regulating hole; 432: second air regulating hole; 433: third air regulating hole. DETAILED DESCRIPTION

[0030] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0031] Secondly, it should be noted that in the description of the embodiments of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0032] In addition, it should be noted that in the description of the embodiments of this application, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0033] In partially premixed combustion, the gas and the required air are partially mixed beforehand. This air is called primary air. The mixed gas then flows out of the flame hole. After ignition, part of the gas is burned by the primary air, forming the flame core, also known as the inner cone. The remaining gas mixes with the combustion products and diffuses and transfers with the surrounding air, then burns. This mixed air is called secondary air, and the resulting flame is commonly known as the outer cone. The flame structure formed by this combustion is often called the Bunsen flame, and burners constructed using this combustion principle are called atmospheric burners.

[0034] In related art, atmospheric burners utilize the gap between two adjacent fire bars as a secondary air channel, which connects to secondary air holes located at the bottom of the burner to provide secondary air for combustion. However, the gap between two adjacent fire bars forms a secondary air channel, forcing both fire bars to share the air within the same secondary air channel. This results in insufficient secondary air flow and poor secondary air uniformity, leading to uneven and incomplete combustion and affecting operating efficiency.

[0035] In view of this, an embodiment of the present application provides a fire grate, a burner and a gas water heater, wherein a secondary air channel is integrated in the fire grate to provide secondary air for combustion, improve the fullness and uniformity of combustion, and improve the combustion effect; and can reduce the gap between adjacent fire grates, making the structure of the burner more compact.

[0036] The preferred technical solutions of the fire grate, burner and gas water heater of the present application are described below with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the structure of the fire bar provided in an embodiment of the present application; Figure 2 This is a front view of the fire bar provided in an embodiment of the present application; Figure 3 yes Figure 2 AA section view in.

[0038] Combine Figures 1 to 3 An embodiment of the present application provides a fire bar, which includes: an inner shell 100, a partition assembly 300, and an outer shell 200 covering a portion of the outer side of the inner shell 100.

[0039] The outer shell 200 is located outside a portion of the inner shell 100. A gap forms between the outer shell 200 and the inner portion of the inner shell 100, forming a secondary air outlet passage 201. The outer shell 200 and the inner portion of the inner shell 100 are connected, for example, by welding. Two secondary air outlet passages 201 are provided, one on each side of the inner shell 100.

[0040] The inner shell 100 defines a first ejection passage 110 and a secondary air intake manifold 120. The secondary air intake manifold 120 communicates with the secondary air outlet manifold 201 to form a secondary air passage, providing secondary air for combustion. Part of the inner shell 100 is located inside the outer shell 200, while another part of the inner shell 100 is located outside the outer shell 200. Specifically, portions of the first ejection passage 110 and the secondary air intake manifold 120 are located inside the outer shell 200.

[0041] The baffle assembly 300 is located inside the inner shell 100. A gap forms between the baffle assembly 300 and the inner shell 100, forming an auxiliary airflow channel 302. The baffle assembly 300 forms a main airflow channel 301, which is connected to the first ejection channel 110 and the auxiliary airflow channel 302. In this way, the mixture of primary air and fuel gas enters the main airflow channel 301 through the first ejection channel 110 and burns to form the primary flame. A portion of the mixed gas enters the auxiliary airflow channel 302 and burns to form the auxiliary flame.

[0042] It can be understood that there are two auxiliary air flow channels 302, which are located on both sides of the main air flow channel 301, which can play the role of gathering the main flame; there are also two secondary air outlet channels 201, which are located on the outside of the auxiliary air flow channel 302, to provide secondary air for combustion, and to prevent the auxiliary flame from diverging, thereby playing the role of gathering the flame.

[0043] Figure 4 This is a schematic structural diagram of a baffle assembly of a fire bar provided in an embodiment of the present application;

[0044] Figure 5 This is an exploded view of the baffle assembly of the fire bar provided in an embodiment of the present application; Figure 6 This is a front view of the baffle assembly of the fire bar provided in an embodiment of the present application; Figure 7 yes Figure 6 BB cross-sectional view in;

[0045] Figure 8 yes Figure 7 Schematic diagram of the enlarged P region.

[0046] Combine Figure 2 、 Figure 3 as well as Figure 4The partition assembly 300 of the embodiment of the present application includes a plurality of partitions, such as Figure 4 The inner partition 310 and the outer partition 320 are arranged in parallel along the thickness direction of the partition, and at least part of the area of the two adjacent partitions is spaced apart to form a main air flow channel 301. In the accompanying drawings, four partitions are provided, and the four partitions are spaced apart along the Y-axis direction, forming three main air flow channels 301. That is to say, when the partition assembly 300 includes N partitions, the partition assembly 300 forms N+1 main air flow channels 301, where N is an integer greater than 2. The embodiment of the present application does not limit the number of partitions in the partition assembly.

[0047] The two outer partitions of the partition assembly 300 are defined as outer partitions 320, and the partition adjacent to the inner side of the outer partition 320 is defined as inner partition 310. This embodiment of the application uses the partition assembly 300 including two outer partitions 320 and two inner partitions 310 as an example for description, but this does not limit the number of partitions.

[0048] Part of the outer partition 320 is welded to the inner shell 100 on both sides, and an auxiliary air flow channel 302 is formed between the outer partition 320 and the inner shell 100 above the welding position. Figure 9 ,in, Figure 9 This is a schematic diagram of the inner shell of a fire bar provided in an embodiment of the present application. A first welding boss 131 is provided on the outer shell 200, to which the outer baffle 320 is welded. A portion of the outer shell 200 protrudes toward the baffle assembly 300, forming the first welding boss 131. The first welding boss 131 is elongated and extends along the X-axis. The first welding boss 131 is welded to the outer baffle 320, securing the baffle assembly 300 to the inner shell 100. Furthermore, the first welding boss 131 separates the first ejection channel 110 from the auxiliary airflow channel 302.

[0049] The outer baffle 320 above the welding position is provided with a first through hole 321 that connects the auxiliary airflow channel 302 and the main airflow channel 301. In this way, part of the mixed gas in the main airflow channel 301 enters the auxiliary airflow channel 302 through the first through hole 321. The mixed gas in the auxiliary airflow channel 302 burns at the outlet port of the auxiliary airflow channel 302 to form a secondary flame.

[0050] The air outlet port of the main air flow channel 301 is flush with the air outlet port of the auxiliary air flow channel 302, so that the main flame and the auxiliary flame burn on the same plane, thereby improving the combustion effect.

[0051] Combine Figure 4 and Figure 5A first welding portion 330 is provided at the top end of the partition, and the first welding portions 330 of all partitions are welded to form a partition assembly 300; the first welding portion 330 separates the air outlet port of the main air flow channel 301 into at least two main flame ports 331.

[0052] The inner partition plates 310 and the outer partition plates 320 are respectively provided with first welding portions 330 . The first welding portions 330 of all the inner partition plates 310 and the first welding portions 330 of all the outer partition plates 320 are welded to form the partition plate assembly 300 .

[0053] Each partition may be provided with one first weld portion 330, or multiple first weld portions 330 may be provided on each partition, with the multiple first weld portions 330 spaced apart along the length of the partition. For example, each partition may be provided with four first weld portions 330, designated as ABCD from left to right. First weld portion A on each partition is welded, first weld portion B on each partition is welded, first weld portion C on each partition is welded, and first weld portion D on each partition is welded. The present embodiment does not limit the number of first weld portions 330.

[0054] Optionally, multiple first welding portions 330 are evenly spaced along the X-axis, so that the main flame vents 331 formed are all of uniform size, ensuring uniform combustion of each flame. When M first welding portions 330 are provided on each partition, the outlet port of the main airflow channel 301 is divided into M+1 main flame vents 331, where M is an integer greater than or equal to 1.

[0055] The first ends of all the partitions are fixedly connected, and the second ends of all the partitions are fixedly connected, for example, by welding, so as to be fixedly connected to the end of the inner shell 100 .

[0056] Reference Figure 4 and Figure 6 When forming multiple main flame vents 331, the first via holes 321 can be arranged in various ways. Exemplarily, the first via holes 321 are elongated, extending along the X-axis, with one first via hole 321 corresponding to one main flame vent 331. This arrangement facilitates the processing of the first via holes 321. Exemplarily, each main flame vent 331 corresponds to multiple first via holes 321, with the multiple first via holes 321 evenly spaced along the X-axis. This arrangement allows the mixed gas to be evenly distributed as it passes through the first via holes 321, further improving combustion uniformity.

[0057] In some possible implementations, the partitions are provided with protruding bumps, which are welded to form the first welding portion 330. This arrangement not only enables welding, but also helps to ensure the spacing between two adjacent partitions.

[0058] In some other possible implementations, combined with Figure 7 and Figure 8 The partition assembly 300 has a midplane O and is symmetrical about the midplane O. Each partition protrudes toward the midplane O to form a first weld portion 330. The outer partition 320 protrudes toward the midplane O to form the first weld portion 330, while the inner partition 310 protrudes toward the midplane O to form the first weld portion 330. It is understood that the inner partition 310, which is closer to the midplane O, has a smaller protrusion, while the outer partition 320, which is farther from the midplane O, has a larger protrusion. This arrangement simplifies and facilitates processing, thereby saving costs.

[0059] In order to ensure the distance between two adjacent partitions, in the embodiment of the present application, at least one of the two adjacent partitions protrudes toward the gap between the two partitions to form a supporting boss that abuts against each other.

[0060] Combine Figure 5 and Figure 8 , part of the outer partition 320 protrudes toward the inner partition 310 to form a first supporting boss 341, and the first supporting boss 341 abuts against the inner partition 310 to ensure the spacing between the outer partition 320 and the inner partition 320. Among them, the first supporting boss 341 can be a circular boss, an elliptical boss, a long strip boss, etc., and one or more first supporting bosses 341 can be provided, and multiple first supporting bosses 341 are spaced apart along the X-axis direction. Combined Figure 5 and 6 The first supporting boss 341 is circular, and two first supporting bosses 341 are provided, one at each end of the outer partition 320. The embodiment of the present application does not limit the shape, number, and arrangement of the first supporting bosses 341.

[0061] Combine Figure 5 and Figure 8 , part of the inner partition 310 protrudes toward the middle plane O to form a second supporting boss 342, and the second supporting bosses 342 of the two inner partitions 310 abut against each other to ensure the spacing between the two inner partitions 310. Among them, the second supporting boss 342 can be a circular boss, an elliptical boss, a long strip boss, etc., and one or more second supporting bosses 342 can be set, and multiple second supporting bosses 342 are spaced apart along the X-axis direction. Combined Figure 5 and 6 The second support bosses 342 are long strip-shaped bosses extending along the Z direction. There are five second support bosses 342, one for each main flame mouth 331. The shape, number, and arrangement of the second support bosses 342 are not limited in this embodiment of the application.

[0062] Combine Figure 5 and Figure 8 , part of the inner partition 310 protrudes toward the middle plane O to form a third supporting boss 343, and the third supporting bosses 343 of the two inner partitions 310 abut against each other to ensure the spacing between the two inner partitions 310. Among them, the third supporting boss 343 can be a circular boss, an elliptical boss, a long strip boss, etc., and the third supporting boss 343 can be set alone or in multiple forms, and the multiple third supporting bosses 343 are spaced apart along the X-axis direction. Combined Figure 5 and 6 The third supporting bosses 343 are circular bosses, and there are four third supporting bosses 343 , with each first welding portion 330 corresponding to one third supporting boss 343 . The embodiment of the present application does not limit the shape, number, and arrangement of the third supporting bosses 343 .

[0063] The partitions of the embodiment of the present application are provided with supporting bosses, which not only helps to ensure the spacing between two adjacent partitions, but also can strengthen the strength of the partitions, and can also block airflow and make the airflow uniform.

[0064] Combine Figures 4 to 6 The bottom end of the outer partition 320 of the embodiment of the present application is provided with a second welding portion 322, and the second welding portion 322 is welded to the partition adjacent to the inner side of the outer partition 320, that is, the second welding portion 322 is welded to the inner partition 310, further improving the structural strength and stability of the partition assembly 300.

[0065] Optionally, the second welding portion 322 is opposite to the first welding portion 330 , and the second welding portion 322 corresponds to the first welding portion 330 one-to-one. Such an arrangement can ensure that the upper and lower ends of the outer partition 320 are subjected to balanced forces, thereby ensuring the stability of the structure.

[0066] Optionally, a portion of the outer partition 320 protrudes toward the inner partition 310 to form a second welding portion. This arrangement is simple and convenient to process, and is conducive to cost saving.

[0067] Continue to refer to Figures 4 to 6 The bottom end of the outer partition 320 is located above the adjacent partition inside the outer partition 320. In other words, the bottom end of the outer partition 320 is higher than the bottom end of the inner partition 310, so that a portion of the bottom area of the inner partition 310 is exposed to the outside. The second weld portion 322 extends downward to form a second connecting bar 350. The second connecting bar 350 extends to the bottom end of the adjacent partition inside the outer partition 320 and is welded to the adjacent partition inside the outer partition 320. In other words, the second connecting bar 350 is welded to the inner partition 310 and is L-shaped.

[0068] The embodiment of the present application is configured such that the bottom opening of the baffle assembly 300 is uneven, thereby forming a blockage to the airflow, so that the airflow is separated here to enter different main flame ports 331 respectively.

[0069] Reference Figures 1 to 3 The outer shell 200 includes two second side panels 210 located on either side of the inner shell 100, and a second connecting bar 220 connected to the top ends of the two second side panels 210. A gap is formed between the second side panels 210 and the inner shell 100 to form a secondary air outlet passage 201. The second connecting bar 220 is connected to the top ends of the second side panels 210 on both sides. This arrangement ensures a distance between the two second side panels 210, thereby avoiding affecting the size of the outlet port of the secondary air outlet passage 201. Optionally, multiple second connecting bars 220 are provided, and the multiple second connecting bars 220 are evenly spaced along the X-axis to further improve the structural strength and stability of the top end ports of the second side panels 210.

[0070] Part of the second side plate 210 protrudes away from the inner shell 100 to form a mounting boss 214. When the fire bar is installed in the burner, the mounting bosses 214 of two adjacent fire bars abut against each other, which improves the convenience and accuracy of the fire bar installation and helps to ensure the spacing between the two adjacent fire bars. Among them, the mounting boss 214 can be a circular boss, an elliptical boss, a polygonal boss, etc., and one mounting boss 214 can be provided, and multiple mounting bosses 214 can be provided, and multiple mounting bosses 214 are spaced apart along the X-axis direction. The embodiment of the present application does not limit the shape, number, and arrangement of the mounting bosses 214.

[0071] Part of the second side plate 210 protrudes toward the inner shell 100 to form a first abutting boss 211 and a second abutting boss 212. The first abutting boss 211 abuts the inner shell 100 at the upper and lower ends of the first welding boss 131. The second abutting boss 212 is located below the first abutting boss 211 and abuts the first side plate 130 forming the first ejection channel 110.

[0072] The first abutting boss 211 may be a long strip boss extending along the Z axis. A plurality of first abutting bosses 211 may be provided, and the plurality of first abutting bosses 211 may be spaced apart along the X axis. Figure 1 and Figure 2 A blocking ridge 213 is provided between two adjacent first abutting bosses 211, and there is a gap between the blocking ridge 213 and the inner shell 100. The embodiment of the present application uses the blocking ridge 213 to block the airflow and avoid excessive airflow.

[0073] The shape, number and arrangement of the first abutting bosses 211 are not limited to those shown in the figure.

[0074] The second abutting bosses 212 may be semicircular, elliptical, polygonal, etc. The embodiment of the present application does not limit the shape, number, and arrangement of the second abutting bosses 212 .

[0075] In the embodiment of the present application, a first abutting boss 211 and a second abutting boss 212 are provided on the second side panel 210 so as to maintain a distance between the second side panel 210 and the inner shell 100, thereby ensuring the size of the secondary air outlet duct 201. In addition, the first abutting boss 211 and the second abutting boss 212 can also block the airflow, which is beneficial to ensuring the uniformity of the secondary air outlet.

[0076] Optionally, the top end surface of the second side plate 210 of the housing 200 protrudes from the air outlet port of the main air flow channel 301, which can restrict the secondary air and make the main flame move closer to the center, thereby improving the gathering effect of the flame combustion.

[0077] Reference Figures 1 to 3 as well as Figure 9 The inner shell 100 includes two opposing first side panels 130. Partial areas of the two first side panels 130 are connected, and a gap is formed between the two first side panels 130 to form the first ejection channel 110 and the secondary air intake manifold 120. The right sides and bottom ends of the two first side panels 130 are connected, for example, by welding or hemming. Partial areas of the left sides of the two first side panels 130 are connected, and a gap is formed between the two first side panels 130 to form an intake port for the first ejection channel 110 and the intake port for the secondary air intake manifold 120. The top ends of the two first side panels 130 are separated by a gap to form a flame combustion port.

[0078] Optionally, the air inlet port of the first ejection channel 110 is flush with the air inlet port of the secondary air intake channel 120, which can improve the uniformity of air entering the first ejection channel 110 and the secondary air intake channel 120 and improve the convenience of connecting the fire grate to the combustion rack of the burner.

[0079] The inner shell 100 has a first side and a second side opposite to each other. Figure 1 Left and right sides of the direction shown in . Combine Figure 1 The second side of the inner shell 100 is provided with a snap-fit opening 140 for engaging with the burner rack. Furthermore, the top end of the second side of the inner shell 100 engages with the burner rack, thereby securing the second side of the fire grate to the burner rack. The first side of the outer shell 200 is fixedly connected to the first side of the inner shell 100 to form a first connecting portion 150. The bottom surface of the first connecting portion 150 forms an abutting surface 151 that abuts the burner rack. Furthermore, the top end of the first connecting portion 150 engages with the burner rack, thereby securing the first side of the fire grate to the burner rack. This ensures that the fire grate is stably mounted on the burner rack, providing a simple and reliable installation method.

[0080] Continue to refer to Figure 9, one end of the secondary air intake channel 120 away from its intake port is recessed inward to form an air plate portion 121, and a second through hole 1211 is provided on the air plate portion 121. The left end of the secondary air intake channel 120 is its intake port, and the side wall of the right end of the secondary air intake channel 120 is recessed inward to form an air plate portion 121, and the air plate portion 121 is provided on both sides of the secondary air intake channel 120. The air plate portion 121 is a flat plate portion, which is convenient for processing the second through hole 1211. The second through hole 1211 is used to connect the secondary air intake channel 120 and the secondary air outlet channel 201. One second through hole 1211 can be provided, or multiple second through holes 1211 can be provided, for example, two. The shape of the second through hole 1211 can be arbitrary, for example, the second through hole 1211 is a waist-shaped hole. The embodiment of the present application does not limit the shape, number and arrangement of the second through hole 1211.

[0081] The embodiment of the present application facilitates the provision of the second through hole 1211 by providing the air passage plate 121. Furthermore, the air passage plate 121 makes the cross-sectional area of the right end of the secondary air intake channel 120 smaller than the cross-sectional area of the left end, thereby increasing the flow rate of the secondary air and allowing the secondary air to quickly enter the secondary air outlet channel 201. The cross-sectional area of the secondary air intake channel 120 is a plane formed by cutting along the YZ plane.

[0082] Combine Figure 3 and Figure 9 The first ejection channel 110 of the embodiment of the present application includes a first section 111, a second section 112, a third section 113, a fourth section 114 and a fifth section 115 that are connected. Among them, the left end of the first section 111 is the air inlet port of the first ejection channel 110, and the first section 111 extends along the X-axis direction. The left end of the first section 111 is connected to the second section 112, and the first section 111 and the second section 112 are tangent to each other, so that the mixed gas flows more smoothly. The third section 113 is connected to the second section 112, and the third section 113 is roughly triangular, and the cross-sectional area of the third section 113 gradually decreases from left to right. The shape of the first section 111, the second section 112 and the third section 113 is roughly a U-shaped channel opening to the left. In addition, the secondary air intake duct 120 is located in the U-shaped channel, and the first side plate 130 between the secondary air intake duct 120 and the U-shaped channel is contact-welded, which facilitates the welding of the second side plate 210 and the first side plate 130 and is conducive to forming the secondary air outlet duct 201.

[0083] The fourth section 114 is connected to the third section 113 and extends along the X-axis, allowing the mixed gas to enter the main airflow channel 301 along the X-axis. The fifth section 115 is connected to the fourth section 114 and extends along the X-axis. The fifth section 115 is located above the fourth section 114.

[0084] The distance between the two first side plates 130 on both sides of the first section 111, that is, the dimension of the first section 111 along the Y direction, is defined as a first interval; the distance between the two first side plates 130 on both sides of the second section 112, that is, the dimension of the second section 112 along the Y direction, is defined as a second interval; the distance between the two first side plates 130 on both sides of the third section 113, that is, the dimension of the third section 113 along the Y direction, is defined as a third interval; the distance between the two first side plates 130 on both sides of the fourth section 114, that is, the dimension of the fourth section 114 along the Y direction, is defined as a fourth interval; the distance between the two first side plates 130 on both sides of the fifth section 115, that is, the dimension of the fifth section 115 along the Y direction, is defined as a fifth interval.

[0085] The second spacing is smaller than the first spacing, forming a welding area for the housing 200 on the sidewall of the second section 112. The third spacing is smaller than the second spacing, creating a gap between the first side plate 130 and the second side plate 210 forming the third section 113, facilitating the formation of the secondary air outlet passage 201. The fourth spacing is smaller than the third spacing, resulting in a smaller cross-sectional area of the fourth section 114 than the third section 113. This changes the velocity and pressure of the mixed gas flow at this point, making the mixed gas more uniform along the X-direction after passing through the fourth section 114, ensuring uniform combustion along the X-direction. The fifth spacing is larger than the fourth spacing, avoiding interference with the bottom end of the baffle assembly 300 and allowing a larger amount of mixed gas to enter the main airflow channel 301, improving the smoothness of the mixed gas flow.

[0086] The first side plate 130 , which forms part of the secondary air inlet passage 120 , part of the first ejection channel 110 and the auxiliary air flow channel 302 , is spaced apart from the housing 200 to form a secondary air outlet passage 201 .

[0087] Specific combination Figure 3 and Figure 9 The second side plate 210 is welded to the first side plate 130 via the welding area 160. The welding area 160 includes Figure 9The six dotted elliptical areas in the figure should be understood as being merely approximate limitations on the position and range of the welding area 160 and should not be construed as limitations on the specific position and range of the welding area 160 in the embodiments of the present application. The outer shell 200 and the area of the first connecting portion 150 on the left side of the inner shell 100, the first partial area on the left end of the secondary air intake channel 120, the second partial area between the first partial area and the area of the first connecting portion 150, the third partial area at the lower portion of the secondary air intake channel 120, the partial area of the second section 112, and the fourth partial area on the right side of the inner shell 100 are welded, so that the outer shell 200 is fixedly connected to the inner shell 100; the bottom end of the outer shell 200 is open to match the top port of the inner shell 100 to form an outlet port for the secondary air outlet channel 201.

[0088] As a result, the remaining portions of the U-shaped channel and the third section 113 and above are separated from the housing 200 to form a secondary air outlet passage 201. As the secondary air passes through the passage corresponding to the fourth section 114, the passage in that section extends along the X-axis, allowing the secondary air to be evenly distributed along the X-axis. Furthermore, the cross-sectional area of the secondary air outlet passage 201 varies in the portions corresponding to the fifth section 115, the first weld boss 131, and the upper region of the first weld boss 131. This changes the flow rate and pressure of the secondary air, making the secondary air more uniform along the X-axis and facilitating improved combustion uniformity.

[0089] It should be noted that the cross sections of each section of the first ejection channel 110 and each section of the secondary air outlet channel 201 refer to the cross sections formed by cutting along the YZ plane.

[0090] Figure 10 This is a schematic structural diagram of a burner provided in an embodiment of the present application; Figure 11 This is an exploded view of the burner provided in an embodiment of the present application.

[0091] Reference Figure 10 and Figure 11 The embodiment of the present application provides a burner, which includes: a combustion rack 410 and a fire bar 1000, and the fire bar 1000 is installed on the combustion rack 410. There are multiple fire bars 1000, and the multiple fire bars 1000 are arranged at intervals along the Y axis direction. Figure 1 and Figure 2 Only one fire bar 1000 is shown in the figure. In fact, the number of the fire bars 1000 is the same as the number of the gas mixing holes 411 provided on the combustion rack 410 .

[0092] The combustion rack 410 is provided with a mixing hole 411 and a secondary air hole 412. The mixing hole 411 is connected to the first injection channel 110 to input the mixed gas into the first injection channel 110; the secondary air hole 412 is connected to the secondary air intake channel 120 to input secondary air into the secondary air outlet channel 201.

[0093] The combustion rack 410 can evenly distribute the mixed gas entering each fire bar 1000 by providing the gas mixing holes 411 , and can evenly distribute the secondary air entering each fire bar 1000 by providing the secondary air holes 412 , thereby improving the uniformity of combustion between each fire bar 1000 .

[0094] To further improve combustion uniformity, the burner in the embodiment of the present application also includes an air regulating plate 430, which is fixed to the combustion frame 410 and is in contact with the side panel of the combustion frame 410 where the mixing holes 411 and the secondary air holes 412 are provided. Furthermore, the air regulating plate 430 is provided with a second air regulating hole 432 directly opposite the mixing hole 411, a third air regulating hole 433 directly opposite the secondary air hole 412, and a first air regulating hole 431 located below the second air regulating hole 432. The first air regulating hole 431, the second air regulating hole 432, and the third air regulating hole 433 are all rectangular holes. The embodiment of the present application achieves uniform airflow between the fire bars 1000 by providing the air regulating plate 430.

[0095] The burner of the present embodiment further includes a combustion chamber housing 420, located outside the combustion frame 410 and the air regulating plate 430, for forming a combustion space. The combustion chamber housing 420 is provided with an air inlet 421, which is connected to the air outlet of the gas water heater's fan.

[0096] In the embodiment of the present application, the opening direction of the air mixing holes 411 and the secondary air holes 412 is the same. The opening direction of the air inlet 421 is different from that of the air mixing holes 411. In this way, the air entering through the air inlet 421 passes through a passage to enter the air mixing holes 411 and the secondary air holes 412. This can prevent the air from the air inlet 421 from directly blowing towards the air mixing holes 411 and the secondary air holes 412, thereby affecting the uniformity of combustion.

[0097] like Figure 10 and Figure 11As shown, the opening direction of the mixing holes 411 and the secondary air holes 412 is along the negative direction of the X-axis, and the opening direction of the air inlet 421 is along the positive direction of the Z-axis. At this point, a first cavity is formed between the bottom of the combustion frame 410 and the bottom of the combustion chamber shell 420, and a second cavity is formed by the gap between the air regulating plate 430 and the combustion chamber shell 420. Thus, air from the air inlet 421 enters the first cavity and enters the second cavity after initially uniformizing the airflow through the first air regulating holes 431. Some air then enters the first ejection channel 110 after further uniformizing the airflow through the second air regulating holes 432, and some air enters the secondary air intake channel 120 after further uniformizing the airflow through the third air regulating holes 433.

[0098] In the embodiment of the present application, a first air regulating hole 431, a second air regulating hole 432 and a third air regulating hole 433 are provided on the air regulating plate 430 to perform double regulation on the air, thereby improving the uniformity of the air entering each fire row 1000, thereby improving the uniformity of combustion.

[0099] An embodiment of the present application also provides a gas water heater, which includes: a water tank, a fan and the burner of the above embodiment, the water tank is installed at the top of the burner, the fan is installed at the bottom of the burner, and the air outlet of the fan is connected to the air inlet of the burner. The fan provides air for the burner to burn, and the high-temperature flue gas generated by the combustion of the burner's fire grate exchanges heat with the water tank, thereby heating the water in the water tank.

[0100] In summary, the fire grate 1000 of the gas water heater of the embodiment of the present application includes an inner shell 100, an outer shell 200, and a baffle assembly 300. The outer shell 200 is located outside a portion of the inner shell 100, and a gap is formed between the outer shell 200 and the portion of the inner shell 100 inside it to form a secondary air outlet passage 201. The inner shell 100 forms a first ejection channel 110 and a secondary air intake passage 120. The secondary air intake passage 120 and the secondary air outlet passage 201 are connected to form a secondary air passage, which provides secondary air for combustion, improves the sufficiency and uniformity of combustion, and improves the combustion effect. The baffle assembly 300 is located inside the inner shell 100, and a gap is formed between the baffle assembly 300 and the inner shell 100 to form an auxiliary air flow passage 302. The baffle assembly 300 forms a main air flow passage 301, which is connected to the first ejection channel 110 and the auxiliary air flow passage 302, respectively. The primary air and fuel gas mixture then enters the primary airflow channel 301 through the first ejection channel 110, where it burns to form a primary flame. A portion of the mixed gas enters the secondary airflow channel 302, where it burns to form a secondary flame. In this embodiment of the present application, the secondary air channels are positioned within the fire bars 1000, reducing the spacing between the fire bars and making the burner structure more compact.

[0101] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A fire grate, characterized in that: include: An inner shell, a partition assembly, and an outer shell covering a portion of the outer side of the inner shell; A gap is formed between the outer shell and a portion of the inner shell to form a secondary air outlet passage; The inner shell is located outside the partition assembly, and the inner shell forms a first ejection channel and a secondary air intake branch channel. The secondary air intake branch channel and the secondary air outlet branch channel are connected to form a secondary air channel. The baffle assembly forms a primary airflow channel, and a gap is formed between the baffle assembly and the inner shell to form a secondary airflow channel, wherein the primary airflow channel is in communication with the first ejection channel and the secondary airflow channel, respectively; wherein an air outlet port of the primary airflow channel is flush with an air outlet port of the secondary airflow channel; The partition assembly includes a plurality of partitions, wherein the two partitions on the outer side of the partition assembly are defined as outer partitions, the partition assembly has a middle plane, and the partition assembly is symmetrical about the middle plane; each of the partitions protrudes toward the middle plane to form a first welding portion; At least one of the two adjacent partitions protrudes toward the gap between the two partitions to form a supporting boss that abuts against each other; the bottom end of the outer partition is higher than the bottom end of the inner partition.

2. The fire bar according to claim 1, characterized in that: The plurality of partitions are parallel and arranged in sequence along the thickness direction of the partitions; at least a portion of the area of two adjacent partitions is spaced apart to form the main air flow channel; Part of the outer partition is welded to the inner shells on both sides, and the auxiliary airflow channel is formed between the outer partition and the inner shell above the welding position; the outer partition above the welding position is provided with a first through hole connecting the auxiliary airflow channel and the main airflow channel.

3. The fire bar according to claim 2, characterized in that: A first welding portion is provided at the top end of the partition, and the first welding portions of all the partitions are welded to form the partition assembly; the first welding portion separates the air outlet port of the main air flow channel into at least two main flame ports.

4. The fire bar according to claim 3, characterized in that: A second welding portion is provided at the bottom end of the outer partition plate, the second welding portion is welded to the partition plate adjacent to the inner side of the outer partition plate, and the second welding portion is opposite to the first welding portion.

5. The fire bar according to claim 4, characterized in that: The bottom end of the outer partition is located above the partition adjacent to the inner side of the outer partition, and the second welding portion extends downward to form a second connecting strip, which extends to the bottom end of the partition adjacent to the inner side of the outer partition, and the second connecting strip is welded to the partition adjacent to the inner side of the outer partition.

6. The fire bar according to any one of claims 1 to 5, characterized in that: The outer shell includes two second side panels located on both sides of the inner shell and a second connecting strip connected to the top ends of the two second side panels, and a gap is formed between part of the second side panels and the inner shell to form the secondary air outlet channel; A partial area of the second side plate protrudes away from the inner shell to form a mounting boss.

7. A burner, characterized in that: include: The combustion rack and the fire bar according to any one of claims 1 to 6, wherein the combustion rack is provided with an air inlet, an air mixing hole and a secondary air hole, the air mixing hole is connected to the first injection channel, the secondary air hole is connected to the secondary air intake branch channel, the opening direction of the air mixing hole and the secondary air hole is the same, and the opening direction of the air inlet is different from the opening direction of the air mixing hole.

8. A gas water heater, characterized in that: include: A water tank, a fan, and the burner according to claim 7, wherein the water tank is installed at the top of the burner, the fan is installed at the bottom of the burner, and the air outlet of the fan is connected to the air inlet of the burner.

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