Combustor and gas water heater

Abstract

The application discloses a burner and a gas water heater, and the burner comprises a first fire grate, an ignition needle and a first wind baffle, wherein the first fire grate is provided with a first injection channel, a first flame injection part and a first injection entrance at two ends of the first injection channel respectively; the ignition needle is arranged near the first flame injection part; the first wind baffle is arranged at the first injection entrance, and the first wind baffle is provided with a first air hole corresponding to the first injection entrance, and the radial dimension of the first air hole is smaller than that of the first injection entrance. The technical scheme of the application improves the gas concentration at the ignition needle, thereby avoiding the phenomena of ignition explosion, flame extinguishing and the like during the gas ignition process, and realizing reliable ignition of the gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas appliances, in particular to a burner and a gas water heater. BACKGROUND

[0002] The burner is a key component of gas products such as gas water heaters and gas wall-hanging furnaces. In order to achieve low emission of nitrogen oxides during combustion, the burner usually adopts a water-cooled structure, and requires a large amount of primary air intake to form a weak combustion. However, such a structure design will result in insufficient gas concentration, causing unreliable ignition, and thus causing the burner to fail to ignite and even cause deflagration. SUMMARY

[0003] The main purpose of the present application is to provide a burner which aims to reduce the air entrainment amount of the ignition needle, thereby increasing the gas concentration at the ignition needle to achieve reliable ignition of the gas.

[0004] To achieve the above purpose, the burner provided by the present application comprises:

[0005] A first fire row has a first entrainment channel, and a first flame injection part and a first entrainment inlet located at both ends of the first entrainment channel, respectively.

[0006] An ignition needle is arranged adjacent to the first flame injection part.

[0007] A first wind shield is located at the first entrainment inlet, and the first wind shield has a first air hole corresponding to the first entrainment inlet, and the radial dimension of the first air hole is smaller than the radial dimension of the first entrainment inlet.

[0008] Preferably, the number of the first entrainment inlets is multiple, and at least one of the first entrainment inlets is provided with the first wind shield.

[0009] Preferably, the first fire row has multiple first entrainment channels, and the multiple first entrainment channels are in communication with the first flame injection part, and the first entrainment inlets are arranged in one-to-one correspondence with the first entrainment channels.

[0010] Preferably, the first wind shield comprises a plate body and a connecting flange extending from the plate body to one side, and the connecting flange is fixed to the first fire row.

[0011] The plate body covers the first entrainment inlet, and the first air hole is formed in the position of the plate body corresponding to the first entrainment inlet.

[0012] Preferably, the first fire spouting part has a plurality of first fire spouting holes, and an induction baffle extending towards the ignition needle is arranged on the first fire spouting part, the induction baffle is arranged at least partially around at least one of the plurality of first fire spouting holes, and an end of the induction baffle close to the ignition needle is in a pointed shape.

[0013] Preferably, the minimum distance between the end of the induction baffle facing the ignition needle and the first fire spouting hole is 6-7 mm.

[0014] Preferably, the burner further comprises:

[0015] a second fire row arranged in parallel with the first fire row, the second fire row having a second induction channel, and a second fire spouting part and a second induction inlet respectively arranged at two ends of the second induction channel;

[0016] an induction needle arranged close to the second fire spouting part; and

[0017] a second wind baffle arranged at the second induction inlet, the second wind baffle having a second air hole arranged corresponding to the second induction inlet, and the radial dimension of the second air hole is smaller than the radial dimension of the second induction inlet.

[0018] Preferably, the second fire row is arranged close to the first fire row.

[0019] Preferably, the first wind baffle and the second wind baffle are arranged integrally.

[0020] The present application also provides a gas water heater comprising a burner, the burner comprising:

[0021] a first fire row having a first induction channel, and a first fire spouting part and a first induction inlet respectively arranged at two ends of the first induction channel;

[0022] an ignition needle arranged close to the first fire spouting part;

[0023] a first wind baffle arranged at the first induction inlet, the first wind baffle having a first air hole arranged corresponding to the first induction inlet, and the radial dimension of the first air hole is smaller than the radial dimension of the induction inlet.

[0024] The present application reduces the air induction amount of the first fire row by arranging a first wind baffle at a first induction inlet of the first fire row, thereby reducing the proportion of air in the mixed gas, i.e. relatively increasing the concentration of gas in the mixed gas, so that the mixed gas is more likely to be ignited when the ignition needle ignites the mixed gas, avoiding phenomena such as ignition deflagration and flame extinction during the ignition process, and improving the reliability of ignition. BRIEF DESCRIPTION OF DRAWINGS

[0025] The technical solutions in the embodiments of the present application or the prior art will be described below with reference to the drawings needed in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by one of ordinary skill in the art without creative effort based on the drawings shown.

[0026] Figure 1 Fig. 1 is a structural schematic diagram of an embodiment of the combustor of the present application;

[0027] Figure 2 Fig. 2 is a partial enlarged view of A in Fig. 1; Figure 1

[0028] Figure 3 Fig. 3 is a top view of the combustor in Fig. 1; Figure 1

[0029] Figure 4 Fig. 4 is a partial enlarged view of B in Fig. 3; Figure 3

[0030] Figure 5 Fig. 5 is a bottom view of the combustor in Fig. 1; Figure 1

[0031] Figure 6 Fig. 6 is a partial enlarged view of C in Fig. 5; Figure 5

[0032] Figure 7 Fig. 7 is a structural schematic diagram of a first fire row in the combustor in Fig. 1; Figure 1

[0033] Figure 8 Fig. 8 is a top view of the first fire row in Fig. 7; Figure 7

[0034] Figure 9 Fig. 9 is a structural schematic diagram of another view of the first fire row in Fig. 7. Figure 7 Brief Description of the Drawings:

[0035]

[0036] Reference Name Reference Name 1 Burner 120 First injection inlet 10 First firebox 130 First flame jet 20 First wind deflector 131 First flame jet hole 30 Ignition pin 140 Induction baffle 40 Second firebox 210 First air hole 50 Second wind deflector 220 Plate body 60 Induction pin 230 Connecting flange 110 First injection channel 510 Second air hole

[0037] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0038] ​​​​​​​​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0039] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, motion condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0040] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0041] The present application provides a burner suitable for a fuel heating device such as a gas water heater, a gas wall-hanging stove, etc. Hereinafter, the burner will be specifically described by taking the gas water heater as an example:

[0042] In an embodiment of the present application, with reference to Figures 1 to 6 , and in combination with Figures 7 to 9 , the burner 1 comprises:

[0043] a first fire row 10 having a first injection channel 110, and a first injection inlet 120 and a first fire spouting part 130 respectively located at two ends of the first injection channel 110;

[0044] a fire ignition needle 30 arranged adjacent to the first fire spouting part 130;

[0045] a first wind baffle 20 located at the first injection inlet 120, the first wind baffle 20 having a first air hole 210 arranged corresponding to the first injection inlet 120, and the radial dimension of the first air hole 210 being smaller than the radial dimension of the first injection inlet 120.

[0046] Without loss of generality, the burner 1 comprises a plurality of fire rows arranged in parallel, the fire row having an injection channel, a fire spouting part and an injection inlet, wherein the fire spouting part and the injection inlet are respectively located at two ends of the injection channel, the gas and the air enter the injection channel from the injection inlet, the gas and the air are mixed in the injection channel, and the mixed gas formed is spouted from the fire spouting part to burn. The fire spouting part is usually located at the upper end of the fire row, and the injection inlet is located at the lower end of the fire row, which can be located at the lower end face of the fire row or the side wall of the fire row, which is not limited here.

[0047] The first fire row 10 is the one closest to the ignition needle 30 among the plurality of fire rows, that is, the ignition needle 30 is arranged corresponding to the first fire spouting part 130 of the first fire row 10. Among them, in order to facilitate the ignition of the ignition needle 30, the ignition needle 30 is arranged near the first fire spouting part 130. Correspondingly, the first fire row 10 has a first injection channel 110, a first fire spouting part 130 and a first injection inlet 120.

[0048] The ignition needle 30 can be realized in the way of electronic ignition (piezoelectric ceramic electric spark ignition) or pulse continuous ignition, and the ignition needle 30 can ignite the mixed gas from the first fire spouting part 130, thereby realizing the ignition and combustion of the gas.

[0049] The purpose of arranging the first wind baffle 20 is to reduce the air injection amount of the first fire row 10, thereby reducing the proportion of air in the mixed gas, that is, relatively increasing the concentration of gas in the mixed gas, so that when the ignition needle 30 ignites the mixed gas, it is easier to ignite the mixed gas, avoiding the phenomena of ignition deflagration, flame extinguishing and the like in the ignition process, and improving the reliability of ignition. Among them, in order to reduce the air injection amount of the first fire row 10, the radial size of the first air hole 210 of the first wind baffle 20 is smaller than the radial size of the first injection inlet 120, thereby relatively weakening the injection effect of the first injection inlet 120, so that the injection amount of air entering the first injection inlet 120 is reduced.

[0050] Referring to Figure 7 , in combination with Figures 3 to 6For the first fire row 10, the number of the first injection inlets 120 arranged at the lower end thereof can be multiple, and at least one first injection inlet 120 is provided with the first baffle 20. It can be understood that when the first injection inlets 120 are arranged in three, the first baffles 20 can be simultaneously arranged at the three first injection inlets 120 to simultaneously reduce the air injection amount of the three first injection inlets 120; or the first baffles 20 can be arranged at any two of the three first injection inlets 120; or the first baffle 20 can be arranged at one of the three first injection inlets 120. Due to the presence of the first baffle 20, the air injection amount of the entire first fire row 10 is inevitably reduced, that is, the air ratio of the mixed gas in the entire first fire row 10 is reduced, so that the gas concentration in the mixed gas is relatively increased, and the reliability of ignition is improved.

[0051] It is worth noting that the first injection inlets 120 of the first fire row 10 are arranged in multiple, and the first injection channels 110 of the first fire row 10 can be one or more. When the first fire row 10 has only one first injection channel 110, the lower end of the first injection channel 110 is provided with multiple first injection inlets 120 which respectively communicate with the first injection channel 110; when the first fire row 10 has multiple first injection channels 110, the multiple first injection channels 110 are independent of each other, so that the mixed gas amount of the first fire row 10 is increased, thereby being beneficial to enhancing the combustion intensity.

[0052] In the embodiment, reference is made to Figure 7 , and in combination with Figures 3 to 6 , the first fire row 10 preferably has multiple first injection channels 110, and the multiple injection channels all communicate with the first fire injection part 130, and the injection inlets are arranged in one-to-one correspondence with the injection channels. In a specific embodiment, the first fire row 10 has three first injection channels 110 and three first injection inlets 120, and the three injection channels are arranged in parallel along the horizontal direction.

[0053] When the burner 1 is working, the temperature of the first fire row 10 is relatively high, and the first baffle 20 is preferably made of a high-temperature-resistant material. In order to facilitate the installation of the first baffle 20, the first baffle 20 is preferably a sheet metal part, so as to be fixed on the first fire row 10 by welding.

[0054] Further, the first baffle 20 comprises a plate body 220 and a connecting flange 230 extending from the plate body 220 to one side, and the connecting flange 230 is fixed to the first fire row 10;

[0055] The plate body 220 covers the first injection inlet 120, and the plate body 220 is provided with a first air hole 210 at a position corresponding to the first injection inlet 120.

[0056] The connecting flange 230 is fixed to the first fire grate 10 by welding, thereby reliably fixing the first baffle 20 to the first fire grate 10. The plate body 220 is located at the lower end of the first fire grate 10, and the plate body 220 covers the first injection inlet 120. The structure of the first air hole 210 provided on the plate body 220 is equivalent to reducing the radial dimension of the first injection inlet 120, thereby weakening the injection effect at the first injection inlet 120, i.e. reducing the amount of air entering the first injection passage through the first injection inlet 120, relatively increasing the gas concentration of the mixed gas, and more conducive to reliable ignition of the gas.

[0057] The connecting flange 230 is preferably formed by folding the edge of the plate body 220. In order to facilitate the bending and folding of the connecting flange 230, a notch can be provided on the connecting flange 230 near the plate body 220, thereby reducing the connection area of the connecting flange 230 and the plate body 220.

[0058] In order to further improve the ignition effect of the ignition needle 30, in the present embodiment, an induction baffle 140 can also be provided on the first fire grate 10. The induction baffle 140 is a conductor, and a sharp protrusion is provided on the induction baffle corresponding to the ignition needle 30. The sharp protrusion and the ignition needle 30 generate a sharp end discharge phenomenon, thereby improving the ignition effect.

[0059] Specifically, for the first fire grate 10, the first fire grate 10 has a plurality of first injection holes 131, and the first fire grate 10 is provided with an induction baffle 140 extending towards the ignition needle 30. The induction baffle 140 is at least partially arranged around at least one of the plurality of first injection holes 131, and the end of the induction baffle 140 close to the ignition needle 30 is in a sharp shape.

[0060] It can be understood that the end of the induction baffle 140 close to the ignition needle 30 is in a sharp shape, thereby generating a sharp end discharge phenomenon between the induction baffle 140 and the ignition needle 30. The induction baffle 140 is arranged around the first injection hole 131, so that the induction baffle can converge the mixed gas sprayed from the first injection hole 131, thereby increasing the concentration of the mixed gas at the sharp end discharge position, and more conducive to ignition of the mixed gas.

[0061] In some specific embodiments, the minimum distance between the end of the induction baffle 140 facing the ignition needle 30 and the first injection hole 131 is preferably 6-7 mm, so that the ignition position of the mixed gas is not too close to the first injection hole 131, thereby avoiding the backfire phenomenon caused by the combustion flame being too close to the first injection hole 131.

[0062] Further, in the above-mentioned burner 1, the plurality of fire rows further comprises a second fire row 40, the second fire row 40 having a second injection channel, and a second injection inlet and a second flame injection part respectively located at two ends of the second injection channel. The structure of the second fire row 40 can be similar to that of the first fire row 10, or can be completely different, which is not specifically limited here.

[0063] In the embodiment, the structure of the second fire row 40 of the above-mentioned burner 1 is preferably similar to that of the first fire row 10, and the difference is that the second fire row 40 is not provided with the induction baffle 140. Specifically, the above-mentioned burner 1 further comprises:

[0064] an induction needle 60 arranged close to the second flame injection part; and

[0065] a second wind baffle 50 located at the second injection inlet, the second wind baffle 50 having a second air hole corresponding to the second injection inlet, the radial dimension of the second air hole being smaller than that of the second injection inlet.

[0066] Specifically, the above-mentioned induction needle 60 can use a thermocouple or a thermal element as a temperature sensing component, thereby realizing detection of the combustion temperature. The working principle of the second wind baffle 50 is similar to that of the first wind baffle 20, and by arranging the second wind baffle 50, the gas concentration of the mixed gas in the second injection channel can be improved, which is more conducive to the combustion of the gas near the induction needle 60, so that the induction needle 60 can better detect the combustion temperature.

[0067] Further, in a preferred embodiment, the second fire row 40 is arranged close to the first fire row 10, and at this time, the induction needle 60 is arranged close to the ignition needle 30, and at this time, the local gas concentration near the induction needle 60 and the ignition needle 30 is larger, which is more conducive to the ignition and combustion of the gas at the local position.

[0068] Since the first fire row 10 and the second fire row 40 are close to each other, at this time, the positions of the first wind baffle 20 and the second wind baffle 50 are also close to each other, in order to simplify the structure of the burner 1, the first wind baffle 20 and the second wind baffle 50 are integrally arranged, that is, the first air hole 210 corresponding to the first injection inlet 120 and the second air hole corresponding to the second injection inlet can be respectively formed on the same baffle body 220.

[0069] It is worth noting that, with reference to Figure 3For the present burner 1, the first wind baffle 20 and the second wind baffle 50 only reduce the air induction amount at the first fire row 10 and the second fire row 40, so that the gas concentration at the ignition and induction positions is increased. For the whole burner 1, the air induction amount of the remaining fire rows does not change, that is, the first fire row 10 and the second fire row 40 have limited influence on the whole burner 1, so that the defect that the nitrogen oxide produced after the combustion of the burner 1 is increased due to the change of the air induction amount in the first fire row 10 and the second fire row 40 does not occur.

[0070] The present application also provides a gas water heater, which comprises the burner, the specific structure of which is referred to the above-mentioned embodiments. Since the present gas water heater adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0071] The above-mentioned is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields under the inventive concept of the present application is included in the patent protection scope of the present application.

Claims

1. A burner, characterized in that, include: The first fire bar has a first ejector channel, and a first flame section and a first ejector inlet located at both ends of the first ejector channel; The ignition needle is positioned near the first flame-emitting part; A first baffle plate is located at the first ejector inlet. The first baffle plate has a first vent hole corresponding to the first ejector inlet. The radial dimension of the first vent hole is smaller than the radial dimension of the first ejector inlet. The first vent hole is used to allow air to pass through and flow to the first ejector inlet. The first flame-emitting part is provided with a sensing baffle extending towards the ignition needle. The sensing baffle includes a surrounding part and a plurality of pointed parts. The surrounding part is arranged around the first flame-emitting hole of the first flame-emitting part. The plurality of pointed parts are connected to the edge of the surrounding part. The end of the pointed part near the ignition needle is pointed. The side of the sensing baffle near the ignition needle does not have the pointed part.

2. The burner as claimed in claim 1, characterized in that, There are multiple first ejector inlets, and at least one of the first ejector inlets is provided with the first wind deflector.

3. The burner as described in claim 2, characterized in that, The first fire bar has multiple ejector channels, all of which are connected to the first flame-emitting section, and the ejector inlet and the ejector channel are configured in a one-to-one correspondence.

4. The burner as claimed in claim 1, characterized in that, The first wind deflector includes a plate body and a connecting flange extending from the plate body to one side, the connecting flange being fixed to the first fire bar; The plate body covers the first ejector inlet, and the plate body has the first vent hole at the position corresponding to the first ejector inlet.

5. The burner as claimed in claim 1, characterized in that, The first flame-emitting part has a plurality of first flame-emitting holes, and the sensing baffle is disposed at least partially around at least one of the plurality of first flame-emitting holes.

6. The burner as claimed in claim 1, characterized in that, The minimum distance between the end of the sensing baffle facing the ignition needle and the first flame hole is 6mm to 7mm.

7. The burner according to any one of claims 1 to 6, characterized in that, The burner also includes: The second fire bar is arranged in parallel with the first fire bar. The second fire bar has a second ejection channel and a second flame section and a second ejection inlet located at both ends of the second ejection channel. The sensing needle is positioned near the second flame-emitting section; and The second baffle is located at the second ejector inlet. The second baffle has a second vent hole corresponding to the second ejector inlet. The radial dimension of the second vent hole is smaller than the radial dimension of the second ejector inlet.

8. The burner as claimed in claim 7, characterized in that, The second burner is positioned adjacent to the first burner.

9. The burner as claimed in claim 7, characterized in that, The first wind deflector and the second wind deflector are integrally formed.

10. A gas water heater, characterized in that, Includes the burner as described in any one of claims 1 to 9.

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