Burners and gas water heaters

Abstract

The present invention discloses a burner and a gas water heater, wherein the burner includes a fire grate and a cooling pipe; the fire grate includes a flame spraying part and an ejector connected to each other, the flame spraying part has a cavity for mixing gas and air; the ejector includes at least two ejector tubes, at least two ejector tubes are connected to the cavity; the cooling pipe is arranged through the flame spraying part. The technical solution of the present invention is to arrange a flame spraying part and an ejector connected to each other in the fire grate, the ejector includes at least two ejector tubes, at least two ejector tubes are connected to the flame spraying part, and the at least two ejector tubes provide multiple gas ejection points, so that more air can be ejected, so that more air and gas are mixed in the flame spraying part; at the same time, a cooling pipe is arranged on the flame spraying part to cool the flame spraying part, prevent the gas and air mixture from backfired, increase the amount of gas and air ejection, and then make the gas and air fully burn, and reduce the generation of nitrogen oxides.

Description

Technical Field

[0001] The present invention relates to the field of combustion technology, and in particular to a burner and a gas water heater. Background Art

[0002] As we all know, the burner is the core component of the gas water heater. In terms of low-nitrogen oxide combustion technology, existing gas water heater burners all use water-cooled burners for wall-mounted boiler products. The current water-cooled burners usually have a small amount of primary air intake, which is insufficient due to the large fluid distribution resistance, resulting in insufficient mixing of gas and air, making the nitrogen oxides after gas combustion higher and cannot meet the requirements.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a fire row group, aiming to improve the mixing degree of gas and air and reduce the emission of nitrogen oxides after combustion.

[0005] To achieve the above-mentioned purpose, the burner proposed in the present invention includes a fire grate and a cooling pipe; the fire grate includes a flamethrower and an ejector connected to each other, the flamethrower has a cavity for mixing gas and air; the ejector includes at least two ejector tubes, at least two of the ejector tubes are connected to the cavity; the cooling pipe is arranged through the flamethrower.

[0006] In one embodiment of the present invention, the fire row includes a plurality of ejectors arranged in parallel, the plurality of ejectors are connected to the fire-spraying part, and the plurality of ejector tubes are connected to the cavity of the fire-spraying part.

[0007] In one embodiment of the present invention, the flamethrower portion comprises at least two sub-flamethrowers arranged in parallel, at least two of the sub-flamethrowers are interconnected, and each of the sub-flamethrowers is connected to one of the ejectors; the cooling pipe runs through at least two of the sub-flamethrowers arranged in parallel.

[0008] In one embodiment of the present invention, a partition is provided in the flame spraying section, and the partition is provided between two adjacent sub-flaming sections. A gap is provided between the end of the partition and the flame spraying section to provide communication between the two adjacent sub-flaming sections. The cooling pipe passes through one of the sub-flaming sections, the partition and the other sub-flaming section in sequence.

[0009] In one embodiment of the present invention, the two opposite side walls of the sub-flame spraying portion are bent inward to form a through hole for the cooling pipe to pass through; two adjacent sub-flame spraying portions are abutted so that the two adjacent side walls are fitted to form the partition, and the partition is provided with the through hole.

[0010] In one embodiment of the present invention, the cooling pipe includes at least two straight pipes and at least one arc-shaped pipe, at least two straight pipes run through the flame-spraying part in parallel, and the outlet and inlet ends of two adjacent straight pipes are connected through the arc-shaped pipe.

[0011] In one embodiment of the present invention, the flame spraying part has an opening, a combustion panel is provided on the opening, and a plurality of fire holes are provided on the combustion panel.

[0012] In one embodiment of the present invention, the plurality of fire holes include circular holes and strip holes.

[0013] In one embodiment of the present invention, the folded edge of the combustion panel is buckled on the flame-spraying part.

[0014] In one embodiment of the present invention, the burner includes a plurality of fire bars, and the plurality of fire bars are arranged in parallel; the cooling pipe runs through the plurality of fire spraying parts arranged in parallel.

[0015] In one embodiment of the present invention, the ejector tube includes an ejector port and a diffuser section for gas circulation, the ejector port and the diffuser section are connected by a mixing section, the flame-spraying portion is arranged at the outlet of the diffuser section, and the cavity is communicated with the diffuser section.

[0016] To achieve the above object, the present invention also provides a gas water heater, comprising the above burner. The burner comprises a fire grate and a cooling pipe; the fire grate comprises a flame spraying part and an ejector connected to each other, the flame spraying part has a cavity for mixing gas and air; the ejector comprises at least two ejector pipes, at least two of which are connected to the cavity; the cooling pipe is arranged through the flame spraying part.

[0017] The technical solution of the present invention is to set a flamethrower and an ejector that are interconnected in the fire grate. The ejector includes at least two ejector tubes, and at least two ejector tubes are connected to the flamethrower. The at least two ejector tubes provide multiple gas ejection points, so that more air can be ejected, so that more air and gas are mixed in the flamethrower; at the same time, a cooling pipe is passed through the flamethrower to cool the flamethrower to prevent the gas and air mixture from backfired, thereby increasing the amount of gas and air ejected, thereby allowing the gas and air to be fully burned and reducing the generation of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a burner of the present invention;

[0020] Figure 2 It is a structural cross-sectional view of a burner embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a fire bar according to an embodiment of the present invention;

[0022] Figure 4 This is a structural cross-sectional view of a fire bar according to an embodiment of the present invention;

[0023] Figure 5 It is a schematic structural diagram of a combustion panel according to an embodiment of the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 100 Fire row 110 Flame Department 111 Flamethrower 112 Partition 113 Through Hole 120 Ejector 121 Ejector tube 122 ejection port 123 Diffuser 124 Mixing section 130 Combustion Panel 131 Fire Hole 200 Cooling pipe 210 Straight pipe 220 Curved tube

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The present invention provides a burner.

[0031] In the embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the burner includes a fire grate 100 and a cooling pipe 200; the fire grate 100 includes a flamethrower 110 and an ejector 120 that are interconnected, the flamethrower 110 has a cavity for mixing gas and air; the ejector 120 includes at least two ejector tubes 121, and at least two ejector tubes 121 are connected to the cavity; the cooling pipe 200 is arranged through the flamethrower 110.

[0032] The burner is mainly a device that achieves combustion by mixing gas and air and then igniting them. The fire grate 100 includes a flame spraying part 110 and an ejector 120. The ejector 120 is a component that ejects gas to eject air. The ejector 120 is connected to the flame spraying part 110. The gas and air are ejected into the flame spraying part 110. Since the flame spraying part 110 is a relatively closed cavity, the gas and air can be fully mixed. At the same time, the ejector 120 includes at least two ejector tubes 121, and the at least two ejector tubes 121 are connected to the flame spraying part 110, so that the burner has multiple ejection points, that is, multiple gas injection points, so that more air can be ejected into the flame spraying part 110, and finally into the flame spraying part 110 for sufficient mixing, so as to achieve the function of sufficient combustion and reducing the generation of nitrogen oxides.

[0033] A cooling pipe 200 is provided on the flame spraying part 110. The cooling pipe 200 is filled with cooling water. Heat exchange occurs between the cooling pipe 200 and the flame spraying part 110. The cooling pipe 200 can cool the flame spraying part 110 to prevent the temperature from being too high and causing the flashback of the gas and air mixture. In this embodiment, considering that the temperature at the flame spraying part 110 in the burner is too high, the cooling pipe 200 is directly provided on the flame spraying part 110 to achieve a better cooling effect.

[0034] It is understandable that the number and specific arrangement of the ejector tubes 121 can be determined according to actual conditions, such as the ejector tubes 121 can be set to 4, 5, 6, 8, etc., and the number is related to the installation space in which they are located. Similarly, the specific arrangement of the ejector tubes 121 also needs to be related to the specific application installation space, such as multiple ejector tubes 121 can be arranged in a single row and multiple columns, multiple rows and a single column, or multiple rows and multiple columns.

[0035] In actual application, the burner may include multiple fire bars 100, or a single fire bar 100 may include multiple ejectors 120, so that the burner has multiple ejection points, so that the gas and air are mixed more evenly and burned more fully.

[0036] The technical solution of the present invention is to set a flamethrower 110 and an ejector 120 that are interconnected in the fire bar 100. The ejector 120 includes at least two ejector tubes 121. At least two ejector tubes 121 are connected to the flamethrower 110. The at least two ejector tubes 121 provide multiple gas ejection points, so that more air can be ejected, so that more air and gas are mixed in the flamethrower 110; at the same time, a cooling pipe 200 is penetrated on the flamethrower 110 to cool the flamethrower 110 to prevent the gas and air mixture from backfire, thereby increasing the amount of gas and air ejected, thereby allowing the gas and air to be fully burned and reducing the generation of nitrogen oxides.

[0037] Further, refer to Figures 2 to 4 The fire bar 100 includes a plurality of ejectors 120 arranged in parallel, each of which is connected to the flame-spraying part 110, and each of which has a plurality of ejector tubes 121 connected to the cavity of the flame-spraying part 110. When the plurality of ejectors 120 arranged in parallel are connected to the flame-spraying part 110, the plurality of ejector tubes 121 of the plurality of ejectors 120 are connected to the cavity of the flame-spraying part 110, thereby increasing the number of gas ejection points to eject more air. The plurality of ejectors 120 are arranged in parallel, so that the distribution positions of the gas and air when entering the flame-spraying part 110 are more uniform, thereby making the mixed gas of the gas and air more uniformly distributed, and further making the burning flame more uniform.

[0038] In one embodiment of the present invention, referring to Figure 2 and Figure 4 The flame spraying section 110 includes at least two sub-flame spraying sections 111 arranged in parallel, at least two sub-flame spraying sections 111 are interconnected, and each sub-flame spraying section 111 is connected to an ejector 120; the cooling pipe 200 runs through at least two sub-flame spraying sections 111 arranged in parallel. One ejector 120 corresponds to one sub-flame spraying section 111, so that the gas ejection actions between two adjacent ejectors 120 do not interfere with each other, and at the same time, the two adjacent sub-flame spraying sections 111 are interconnected, so that the gas ejected by each ejector 120 and the air can be mixed together, so that the gas and the air are fully mixed to achieve the effect of full combustion. The cooling pipe 200 runs through all the sub-flame spraying sections 111 to cool down each sub-flame spraying section 111.

[0039] In one embodiment of the present invention, referring to Figures 2 to 4, a partition 112 is provided in the flame spraying section 110, and the partition 112 is provided between two adjacent sub-flaming sections 111, and there is a gap between the end of the partition 112 and the flame spraying section 110, so as to allow the two adjacent sub-flaming sections 111 to communicate with each other; the cooling pipe 200 is sequentially passed through one of the sub-flaming sections 111, the partition 112 and the other sub-flaming section 111. A partition 112 is provided between two adjacent sub-flaming sections 111, and the partition 112 separates the cavities of the two sub-flaming sections 111, and there is a gap between the end of the partition 112 and the flame spraying section 110, so that the two adjacent sub-flaming sections 111 can receive the gas and air ejected from the respective corresponding ejectors 120 without interfering with each other, and then can be mixed through the gap between the partition 112 and the flame spraying section 110. The cooling pipe 200 passes through the two sub-fire spraying parts 111 and the partition 112 between the two sub-fire spraying parts 111, so that the partition 112 can contact the cooling pipe 200, thereby increasing the contact area of ​​heat exchange, improving the heat exchange efficiency, and achieving a better cooling effect.

[0040] It is understandable that the specific structure of the partition 112 can be determined according to actual conditions, such as being set in a "7" shape so that the contact area between the cooling pipe 200 and the partition 112 is large enough to accelerate the heat dissipation efficiency; or being set in an "I" shape to save materials, etc. The partition 112 can be an independently set structure or a structure integrally formed with the flamethrower 110.

[0041] In one embodiment of the present invention, referring to Figures 2 to 4 , the two opposite side walls of the sub-flame spraying part 111 are bent inward to form a through hole 113 for the cooling pipe 200 to pass through; the two adjacent sub-flame spraying parts 111 are abutted, so that the two adjacent side walls are fitted together to form a partition 112, and the partition 112 is provided with a through hole 113. The cooling pipe 200 is penetrated by the through hole 113, so that the cooling pipe 200 directly contacts the side wall of the sub-flame spraying part 111. Since the through hole 113 is formed by bending the side inward, a certain flange will be generated to contact the cooling pipe 200, thereby increasing the heat exchange area and improving the cooling efficiency. When the two adjacent sub-flame spraying parts 111 are abutted, the two side walls in contact in the middle are fitted together to form a partition 112. Since the two side walls are bent inward respectively, the flange at the through hole 113 in the partition 112 is larger, and the contact area with the cooling pipe 200 is larger, so that the cooling pipe 200 can be installed stably while improving the cooling efficiency.

[0042] In actual application, the installation method of the cooling pipe 200 and the flame spraying part 110 can be determined according to the actual situation. However, since the flame spraying part 110 is a cavity where gas and air are mixed, the sealing of the cooling pipe 200 and the flame spraying part 110 is first considered when designing the installation method. For example, a fireproof sealing layer can be provided at the connection between the cooling pipe 200 and the flame spraying part 110, or the cooling pipe 200 and the flame spraying part 110 can be welded and fixed. In one embodiment of the present invention, after the cooling pipe 200 is inserted into the through hole 113 of the flame spraying part 110, the pipe diameter of the cooling pipe 200 can be enlarged by using a pipe expansion process to achieve an interference fit with the through hole 113 of the flame spraying part 110 to achieve sealing.

[0043] In one embodiment of the present invention, two adjacent sub-flaming parts 111 are fixed by welding, and specifically, a spot welding process may be used.

[0044] Further, refer to Figure 1 and Figure 2 The cooling pipe 200 includes at least two straight pipes 210 and at least one arc-shaped pipe 220. At least two straight pipes 210 run through the flame spraying part 110 in parallel, and the outlet and inlet ends of two adjacent straight pipes 210 are connected through the arc-shaped pipe 220. The straight pipe 210 is directly in contact with the flame spraying part 110, and the arc-shaped pipe 220 is used to connect two adjacent straight pipes 210, so that the cooling pipe 200 forms a complete pipe body that can inlet and outlet water, so that there is always flowing cooling water flowing through the flame spraying part 110, so that the cooling effect is better. It can be understood that the specific number of straight pipes 210 and arc-shaped pipes 220 must be determined according to the size of the actual burner and the installation space. In the optional scheme of this embodiment, the cooling pipe 200 is formed by connecting four straight pipes 210 and three arc-shaped pipes 220.

[0045] In one embodiment of the present invention, the straight tube 210 and the arc tube 220 are fixed by welding.

[0046] Further, refer to Figures 1 to 5 The flame spraying part 110 includes an opening and a combustion panel 130 disposed at the opening, and the combustion panel 130 is provided with a plurality of fire holes 131. The mixed gas of the fuel gas and air in the flame spraying part 110 is sprayed out from the plurality of fire holes 131 of the combustion panel 130 and ignited by the ignition needle disposed on the combustion panel 130 to achieve flame stability.

[0047] In one embodiment of the present invention, referring to Figure 5 The plurality of fire holes 131 include round holes and strip holes. The diameter area of ​​the strip holes is larger than that of the round holes, and the arrangement density of the round holes is greater than that of the strip holes. The combination of the round holes and the strip holes makes the mixed gas of the gas and the air spray out more evenly, and the combustion of the gas and the air is more even.

[0048] In one embodiment of the present invention, the combustion panel 130 is folded and buckled onto the flame-spraying portion 110 .

[0049] Further, refer to Figure 1 and Figure 2 The burner includes a plurality of fire bars 100, which are arranged in parallel; the cooling pipe 200 runs through the plurality of flame spraying parts 110 arranged in parallel. The burner includes a plurality of fire bars 100 arranged in parallel, so that the burning flame is more uniform. The cooling pipe 200 runs through the plurality of flame spraying parts 110 arranged in parallel, so as to cool the flame spraying parts 110 of each fire bar 100, so that the cooling effect is better.

[0050] Further, refer to Figure 3 and Figure 4 The ejector pipe 121 includes an ejector port 122 and a diffuser section 123 for gas circulation. The ejector port 122 and the diffuser section 123 are connected by a mixing section 124. The flame spraying section 110 is arranged at the outlet of the diffuser section 123, and the cavity of the flame spraying section 110 is connected to the diffuser section 123. The gas is injected from the nozzle into each ejector port 122 through the gas valve through the gas pipeline. After the gas is mixed with air once in the mixing section 124, it is injected into the cavity of the flame spraying section 110 through the diffuser section 123 and ejected from the combustion panel 130 for combustion. The ejector pipe 121 can be T-shaped or pipe-shaped. The pipe-shaped ejector pipe 121 is used for the strong drum horizontal ejection thick and thin structure. In the present invention, a T-shaped ejector tube 121 is preferred, which occupies a small space. Moreover, since the ejector tube 121 is a vertical structure, it is beneficial to the arrangement of the fire grate 100 and the nozzle. In addition, the length of the mixing section 124 can be increased appropriately, which is beneficial to improving the premixing effect of the gas and air and facilitating more complete combustion of the gas.

[0051] The present invention also proposes a gas water heater, which includes a burner. The specific structure of the burner refers to the above-mentioned embodiment. Since the gas water heater adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

Claims

1. A burner, characterized in that: include: The fire row comprises a fire spraying part and an ejector connected to each other, wherein the fire spraying part has a cavity for mixing gas and air; the ejector comprises at least two ejector tubes, and at least two ejector tubes are connected to the cavity; and A cooling pipe, the cooling pipe being arranged through the flame-spraying part; The flame spraying part comprises at least two sub-flame spraying parts arranged in parallel, and at least two of the sub-flame spraying parts are connected to each other; A partition is provided in the flame spraying portion, and the partition is provided between two adjacent sub-flame spraying portions. A gap is provided between the end of the partition and the flame spraying portion to provide communication between the two adjacent sub-flame spraying portions.

2. The burner according to claim 1, characterized in that The fire row includes a plurality of ejectors arranged in parallel, the plurality of ejectors are connected to the fire-spraying part, and the plurality of ejector tubes are connected to the cavity of the fire-spraying part.

3. The burner according to claim 2, characterized in that Each of the sub-fire spraying parts is connected to a corresponding ejector; the cooling pipe runs through at least two of the sub-fire spraying parts arranged in parallel.

4. The burner according to claim 3, characterized in that The cooling pipe is sequentially arranged through one of the sub-fire spraying parts, the partition plate and another of the sub-fire spraying parts.

5. The burner according to claim 4, characterized in that The two opposite side walls of the sub-fire spraying parts are bent inwardly to form a through hole for the cooling pipe to pass through; two adjacent sub-fire spraying parts are abutted to make the two adjacent side walls fit together to form the partition, and the partition is provided with the through hole.

6. The burner according to any one of claims 1 to 5, characterized in that: The cooling pipe includes at least two straight pipes and at least one arc-shaped pipe. At least two straight pipes run through the flame-spraying part in parallel. The outlet ends and inlet ends of two adjacent straight pipes are connected through the arc-shaped pipe.

7. The burner according to any one of claims 1 to 5, characterized in that: The flame spraying part has an opening, and a combustion panel is arranged on the opening, and a plurality of fire holes are arranged on the combustion panel.

8. The burner according to claim 7, characterized in that The plurality of fire holes include round holes and strip holes.

9. The burner according to claim 7, characterized in that The folded edge of the combustion panel is buckled on the flame-spraying part.

10. The burner according to any one of claims 1 to 5, characterized in that: The burner comprises a plurality of fire bars, which are arranged in parallel; the cooling pipe runs through the plurality of fire spraying parts arranged in parallel.

11. The burner according to any one of claims 1 to 5, characterized in that: The ejector pipe comprises an ejector port for gas circulation and a diffuser section, the ejector port and the diffuser section are connected via a mixing section, the flame-spraying portion is arranged at the outlet of the diffuser section, and the cavity is communicated with the diffuser section.

12. A gas water heater, characterized in that: Comprising a burner as claimed in any one of claims 1 to 11.

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