Burners and gas water heaters

Abstract

The present invention discloses a burner and a gas water heater. The burner includes a shell, an injector, and a heat absorption structure. The shell forms a combustion chamber. The injector includes a nozzle group arranged on the side wall of the combustion chamber, the nozzle group including multiple nozzles, and the nozzles are used to inject an airflow containing gas and / or air into the combustion chamber. The heat absorption structure includes a first heat absorption portion arranged opposite to the nozzle group. The direction of the airflow injected by the nozzle deviates from the direction in which the nozzle faces the first heat absorption portion. In the present invention, the injector injects a combustion-supporting airflow of gas and / or air into the combustion chamber. The provision of the heat absorption structure can reduce the temperature of a local area of ​​the combustion chamber and avoid the problem of flashback. The direction of the airflow injected by the nozzle deviates from the direction in which the nozzle faces the first heat absorption portion, preventing the airflow ejected from the nozzle from directly impacting the first heat absorption portion, thereby preventing the first heat absorption portion from vaporizing due to the direct impact and generating vaporization noise.

Description

Technical Field

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

[0002] During operation, the burner of a gas water heater can easily generate high temperatures on the inner wall of the combustion chamber, leading to flashback. To address this issue, existing burners have cooling tubes installed within the combustion chamber to reduce the temperature of the inner wall. However, the high-temperature airflow within the combustion chamber can directly impact the cooling tubes, causing them to vaporize and generate vaporization noise. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a burner and a gas water heater, which aim to solve the problem of high-temperature airflow of the existing burner directly impacting the cooling pipe and generating vaporization noise.

[0004] To achieve the above-mentioned object, the present invention provides a burner comprising:

[0005] A housing is formed with a combustion chamber, wherein the combustion chamber includes two first side walls arranged opposite to each other;

[0006] an injector, comprising a nozzle group, the nozzle group comprising a plurality of nozzles, the nozzles being used to inject a gas flow containing gas and / or air into the combustion chamber; and

[0007] The heat absorbing structure includes a first heat absorbing portion;

[0008] The nozzle group and the first heat absorbing portion are arranged on the two first side walls, so that the direction of the airflow sprayed by the nozzle deviates from the direction in which the nozzle faces the first heat absorbing portion.

[0009] In one embodiment, a flue gas flow channel is defined between the two first side walls, and the flue gas flow channel has an air inlet end and an air outlet end;

[0010] The first heat absorbing portion is provided on a side of the nozzle group away from the air inlet end;

[0011] The first side wall includes a first installation wall for installing the first heat absorption part. In the direction away from the air inlet end, the first installation wall is inclined and gradually away from the first side wall where the nozzle group is located.

[0012] In one embodiment, the heat absorbing structure further includes a second heat absorbing portion, and the second heat absorbing portion is disposed adjacent to the nozzle group.

[0013] In one embodiment, a flue gas flow passage is defined between the two first side walls, and at least two second heat absorbing parts are spaced apart on the flue gas flow passage;

[0014] The nozzle assembly is arranged between the two second heat absorbing parts.

[0015] In one embodiment, there are at least two nozzle groups, and the two nozzle groups are arranged on the two first side walls. At least two first heat absorption parts are provided corresponding to the two nozzle groups. The first heat absorption parts are arranged adjacent to the nozzle groups on the same first side wall to constitute the second heat absorption parts of the nozzle groups on the same first side wall.

[0016] In one embodiment, the first heat absorbing portion and the second heat absorbing portion are configured as cooling pipes;

[0017] The cooling pipes in the combustion chamber are connected in sequence so that the coolant can circulate between the cooling pipes.

[0018] In one embodiment, the housing includes two first shell plates arranged opposite to each other, and two connecting shell plates connecting the two first shell plates, wherein the two first shell plates and the two connecting shell plates together enclose the entire circumferential side wall of the combustion chamber;

[0019] The opposite surfaces of the two first shell plates constitute two first side walls. A channel is formed inside the connecting shell plate, and the channel is used to connect the cooling pipes in sequence.

[0020] In one embodiment, the connecting shell plate includes two connecting single plates stacked sequentially in a direction approaching and away from the combustion chamber;

[0021] Wherein, one of the two connecting plates is provided with a groove, and the other one is arranged to cover the groove to define the channel.

[0022] In one embodiment, the multiple nozzles of each nozzle group are linearly arranged along the circumference of the combustion chamber, and the second heat absorption portion located on the same first side wall is arranged side by side with the multiple nozzles of the nozzle group.

[0023] In one embodiment, the orthographic projections of the plurality of nozzles of the two nozzle groups on the same first side wall are staggered.

[0024] In one embodiment, the first heat absorbing part and / or the second heat absorbing part is configured as a cooling pipe;

[0025] A welding groove is recessed on the side wall of the combustion chamber, and the cooling pipe is welded and fixed to the welding groove.

[0026] In one embodiment, the first heat absorbing part and / or the second heat absorbing part is configured as a cooling pipe;

[0027] The cross section of the cooling tube is oblate.

[0028] In one embodiment, the combustion chamber includes a first combustion chamber and a second combustion chamber that are connected in sequence;

[0029] The burner further comprises a preheating burner, which is provided in the first combustion chamber and is used to receive gas and air and heat them to a preset target temperature before supplying them to the second combustion chamber;

[0030] The nozzle group is arranged on the side wall of the second combustion chamber, and is used to inject air and / or gas into the second combustion chamber to react with the flue gas heated to a preset target temperature delivered by the first combustion chamber, so that a high-temperature air combustion reaction occurs in the second combustion chamber.

[0031] In addition, to achieve the above-mentioned purpose, the present invention also provides a gas water heater, comprising a main body, a heat exchanger and the burner as described above, wherein a heat exchange chamber is provided in the main body, and the heat exchanger is provided in the heat exchange chamber.

[0032] In the technical solution provided by the present invention, the injector injects a combustion-supporting flow of gas and / or air into the combustion chamber; the setting of the heat absorption structure can reduce the temperature of the local area of ​​the combustion chamber to avoid the backfire problem; the direction of the airflow injected by the nozzle deviates from the direction of the nozzle facing the first heat absorption part, preventing the airflow ejected from the nozzle from directly impacting the first heat absorption part, thereby avoiding the first heat absorption part from vaporizing due to the positive impact and generating vaporization noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0034] Figure 1 A partial exploded schematic diagram of the structure of a gas water heater according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic cross-sectional view of a gas water heater at the combustion chamber;

[0036] Figure 3 for Figure 1 Schematic diagram of the assembly of the ejector and heat absorption structure;

[0037] Figure 4 for Figure 1 Schematic diagram of the three-dimensional connection shell plate;

[0038] Figure 5 for Figure 1 A three-dimensional schematic diagram of the first shell.

[0039] Description of Figure Numbers:

[0040]

[0041]

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] 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 various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0045] 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 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 such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually 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.

[0046] During operation, the burner of a gas water heater can easily generate high temperatures on the inner wall of the combustion chamber, leading to flashback. To address this issue, existing burners have cooling tubes installed within the combustion chamber to reduce the temperature of the inner wall. However, the high-temperature airflow within the combustion chamber can directly impact the cooling tubes, causing them to vaporize and generate vaporization noise.

[0047] The present invention provides a burner that is used in gas water heaters and related products and equipment including gas wall-mounted boilers that use gas combustion to generate high-temperature hot water for home bathing and heating. For ease of understanding, the following application to gas water heaters is taken as an example. Figures 1 to 5 This is an embodiment of the burner provided by the present invention being applied to a gas water heater.

[0048] See also Figures 1 to 2 The burner provided by the present invention includes a shell 100, an injector and a heat absorption structure, wherein the shell 100 is formed with a combustion chamber 110, and the combustion chamber includes two first side walls 111 arranged opposite to each other; the injector includes a nozzle group 200, and the nozzle group 200 includes a plurality of nozzles 210, and the nozzles 210 are used to inject an airflow containing gas and / or air into the combustion chamber 110; the heat absorption structure includes a first heat absorption part 310; wherein the nozzle group 200 and the first heat absorption part 310 are respectively arranged on the two first side walls 111, so that the direction of the airflow injected by the nozzle 210 deviates from the direction in which the nozzle 210 is facing the first heat absorption part 310.

[0049] In the technical solution provided by the present invention, the injector injects a combustion-supporting flow of gas and / or air into the combustion chamber 110; the setting of the heat absorption structure can reduce the temperature of the local area of ​​the combustion chamber 110 and avoid the backfire problem; the direction of the airflow injected by the nozzle 210 deviates from the direction of the nozzle 210 facing the first heat absorption part 310, preventing the airflow ejected from the nozzle 210 from positively impacting the first heat absorption part 310, thereby avoiding the first heat absorption part 310 from vaporizing due to the positive impact and generating vaporization noise.

[0050] The combustion chamber 110 creates the necessary combustion environment to generate the flue gas required for heat exchange or to generate the high temperature required for heat exchange, thereby achieving heat exchange through the flue gas or thermal contact. The specific form of the housing 100 and the combustion chamber 110 is not limited in this design and can be configured as any desired shape, size, and material.

[0051] However, it can be understood that the combustion chamber 110 includes two first side walls 111 that are arranged opposite to each other, and a flue gas flow channel 110a is defined between the two first side walls 111. The flue gas flow channel 110a has an air inlet end 112 and an air outlet end 113 that are arranged opposite to each other, so that external combustion-supporting gas can enter from the air inlet end 112 and flow into the flue gas flow channel 110a. The injector injects gas and / or air into the combustion chamber 110 to support the combustion in the combustion chamber 110, and the flue gas generated after combustion flows out from the air outlet end 113. It should be noted that the air inlet end 112 and the air outlet end 113 are generally arranged on opposite sides of the combustion chamber 110, so as to extend the circulation path of the flue gas and enhance the combustion effect. Since the flue gas generally flows in the direction from the air inlet end 112 to the air outlet end 113, for ease of understanding, this direction can be defined as the smoke delivery direction.

[0052] The heat absorption method of the heat absorption structure is not limited in this design and can be configured as one or more of air-cooled heat absorption, water-cooled heat absorption, chemical cooling that does not interfere with the normal operation of the burner, etc., as needed. However, for ease of understanding, the following embodiments illustrate the heat absorption structure using water-cooled heat absorption as an example. Based on this, the first heat absorption portion 310 and the second heat absorption portion 320 described below can both be configured as cooling tubes 330. Coolant circulates within the cooling tubes 330. The circulating coolant removes the high temperature of the environment surrounding the first and second heat absorption portions 310 and 320.

[0053] The purpose of the heat absorption structure is to reduce the local high temperature at the desired location in the combustion chamber 110. Since the airflow ejected from the nozzle 210 is a combustion-supporting airflow, it will entrain high-temperature flue gas in the combustion chamber 110. When the high-temperature flue gas directly impacts the first heat absorption part 310, it not only exerts a large impact force on the first heat absorption part 310, but also forms a large temperature difference with the heat absorption surface of the first heat absorption part 310, causing the heat absorption surface of the first heat absorption part 310 to vaporize, generating vaporization noise. Figure 2 The dotted line indicates the direction in which the nozzle 210 is facing the first heat absorbing part 310, and the solid line indicates the direction of the airflow ejected by the nozzle 210. When the direction of the airflow ejected by the nozzle 210 deviates from the direction in which the nozzle 210 is facing the first heat absorbing part 310, the airflow ejected from the nozzle 210 will not directly impact the first heat absorbing part 310, but will at least be staggered at a certain angle, thereby reducing the direct impact of the airflow on the first heat absorbing part 310, thereby effectively mitigating the direct impact between the first heat absorbing part 310 and the high-temperature flue gas.

[0054] In the above implementation, there are multiple ways to deviate the direction of the airflow ejected by the nozzle 210 from the direction in which the nozzle 210 faces the first heat absorbing portion 310. If the airflow ejected by the nozzle 210 is defined as flowing along the airflow path, then:

[0055] In one embodiment, the first heat sink 310 is positioned offset from the airflow path. Specifically, when the nozzle 210 is positioned in a fixed position and its spray direction is determined, the first heat sink 310 can be positioned outside the airflow path. Conversely, when the first heat sink 310 is positioned in a fixed position, the nozzle 210's installation position or spray direction can be adjusted so that the nozzle 210 sprays away from the first heat sink 310. For example, when the first heat sink 310 and the nozzle assembly 200 are positioned on the same horizontal plane, the nozzle 210 can be adjusted to spray upward or downward relative to the plane.

[0056] In another embodiment, the first heat absorbing portion 310 may be disposed on the airflow path, however, the airflow path deviates from the surface normal of the first heat absorbing portion 310. It will be appreciated that when the first heat absorbing portion 310 is disposed on the airflow path, the airflow ejected from the nozzle 210 will inevitably pass through a certain location on the surface of the first heat absorbing portion 310. Therefore, the airflow direction at that location needs to be staggered from the normal direction at that location to avoid directly impacting the first heat absorbing portion 310 along the normal direction at that location.

[0057] Generally, when the airflow path deviates from the surface normal of the first heat absorbing portion 310, it can mitigate the forward impact of the airflow ejected from the nozzle assembly 200 on the surface of the first heat absorbing portion 310. However, to further enhance this mitigation effect, in one embodiment, the angle between the airflow path and the surface normal of the first heat absorbing portion 310 is not less than 45° and not greater than 90°. It will be appreciated that when the angle between the airflow path and the surface normal of the first heat absorbing portion 310 is less than 45°, the impact force of the airflow on the first heat absorbing portion 310 has a greater component in the direction of the surface normal. Since the first heat absorbing portion 310 is a solid structure, when the angle between the airflow path and the surface normal of the first heat absorbing portion 310 is greater than 90°, the airflow path must pass through the first heat absorbing portion 310 in the opposite direction, which is not practical.

[0058] It should be noted that in the above-described embodiment, the airflow path refers to the flow path of the main stream of air ejected from the nozzle 210 within the combustion chamber 110. This path can be essentially determined after the nozzle 210 is securely installed within the combustion chamber 110 by determining the nozzle 210's injection angle, injection velocity, injection volume, and the flow rate and velocity of the combustion-supporting gas flowing through the flue gas flow passage 110a. Therefore, to a certain extent, the airflow path can be adjusted accordingly by adjusting the installation method of the nozzle 210 (i.e., adjusting the orientation of the nozzle 210), the airflow injection parameters of the nozzle 210, and the flow parameters of the combustion-supporting gas flowing through the flue gas flow passage 110a. Therefore, by adjusting the airflow path or by adjusting the installation method of the first heat absorption portion 310, it is possible to ensure that the direction of the airflow ejected by the nozzle 210 deviates from the direction in which the nozzle 210 is directly facing the first heat absorption portion 310. However, for ease of understanding, the following embodiments will be described using the adjustment of the installation method of the first heat absorption portion 310 as an example.

[0059] Specifically, see Figure 2 、 Figure 3 and Figure 5 In one embodiment, the first heat absorption portion 310 is arranged on a side of the nozzle group 200 away from the air inlet end 112; the first side wall 111 includes a first mounting wall 114 for mounting the first heat absorption portion 310, and in the direction away from the air inlet end 112, the first mounting wall 114 is inclined gradually away from the first side wall 111 where the nozzle group 200 is located.

[0060] It can be understood that because the flue gas within the combustion chamber 110 circulates in the direction of smoke delivery, the airflow injected into the combustion chamber 110 is driven by the flue gas and bends and extends toward the exhaust end 113 of the combustion chamber 110. This places the first heat absorbing portion 310, located near the exhaust end 113 of the combustion chamber 110, in the airflow path, making it more susceptible to positive impact from the airflow. Based on this, by extending the first mounting wall 114 on which the first heat absorbing portion 310 is located in the aforementioned tilted manner, the first heat absorbing portion 310 and the airflow path can be offset, thereby causing the airflow path to be staggered or partially staggered.

[0061] Of course, the first side wall 111 may also include a second mounting wall, and the second mounting wall is used to install the nozzle group 200, or the nozzle group 200 and the second heat absorption part 320. The first mounting wall 114 and the second mounting wall can be integrally formed or separately arranged; when the first mounting wall 114 and the second mounting wall are separately arranged, the two can be connected by screw fixation, snap fixation, adhesive fixation, etc.

[0062] Next, based on the above embodiment, please refer to Figures 1 to 3The heat absorption structure further includes a second heat absorption portion 320, which is disposed adjacent to the nozzle assembly 200. The second heat absorption portion 320 is disposed adjacent to the nozzle assembly 200 and may be spaced apart at any side of the nozzle assembly 200 or abut against a sidewall of the nozzle assembly 200, so that the second heat absorption portion 320 can cool the nozzle assembly 200 and the surrounding area of ​​the nozzle assembly 200 to prevent backfire.

[0063] Furthermore, in one embodiment, at least two second heat absorbing portions 320 are spaced apart in the flue gas flow channel 110a, that is, in the direction from the air inlet end 112 to the air outlet end 113; the nozzle assembly 200 is disposed between the two second heat absorbing portions 320. The second heat absorbing portions 320 are disposed on opposite sides of the nozzle assembly 200, absorbing heat and cooling the nozzle assembly 200 both upstream and downstream in the direction of smoke delivery, thereby facilitating evenly cooling the nozzle assembly 200.

[0064] Next, in one embodiment, at least two nozzle groups 200 are provided, and the two nozzle groups 200 are respectively provided on the two first side walls 111. At least two first heat absorption parts 310 are correspondingly provided on the two first side walls 111. The first heat absorption parts 310 are arranged adjacent to the nozzle group 200 on the same side to constitute the second heat absorption part 320 of the nozzle group 200 on the same side.

[0065] It can be understood that the setting schemes of the nozzle group 200 and the first heat absorption part 310 on the two first side walls 111 can be the same or different, but for ease of understanding, the following embodiments are explained as an example in which the nozzle group 200 and the first heat absorption part 310 on the two first side walls 111 are set the same.

[0066] When there are two nozzle groups 200, the two nozzle groups 200 are respectively arranged on the two first side walls 111, which can spray airflow in opposite directions and optimize the circulation and reflow effect after the airflow is sucked in; the first heat absorption part 310 can be arranged upstream and / or downstream of the nozzle group 200 in the smoke delivery direction; since the arrangement schemes of the nozzle groups 200 and the first heat absorption parts 310 on the two first side walls 111 are roughly the same, the first heat absorption part 310 is arranged adjacent to the nozzle group 200 of the same first side wall 111, that is, it constitutes the second heat absorption part 320 of the nozzle group 200, which can cool the nozzle group 200.

[0067] When there are more than two nozzle groups 200, the multiple nozzle groups 200 can be separately arranged on the two first side walls 111. At this time, there can be multiple first heat absorption parts 310 and / or second heat absorption parts 320, and the multiple nozzle groups 200 on the same first side wall 111 can be separately arranged between the multiple first heat absorption parts 310 and / or second heat absorption parts 320; or, the multiple nozzle groups 200 can be arranged along the entire circumferential side wall of the combustion chamber 110, and the first heat absorption parts 310 and / or the second heat absorption parts 320 are arranged corresponding to the multiple nozzle groups 200.

[0068] Based on the above, when there are at least two nozzle groups 200 and the two nozzle groups 200 are respectively arranged on the two first side walls 11, then specifically, in one embodiment, the first heat absorption part 310 is arranged on the side of the nozzle group 200 away from the air intake end 112 of the combustion chamber 110; the first side wall 111 includes a first mounting wall 114 for mounting the first heat absorption part 310; the first mounting walls 114 of the two first side walls 111 are arranged to be inclined away from each other in a direction away from the air intake end 112 of the combustion chamber 110.

[0069] Also, see Figures 1 to 4 In one embodiment, the first heat absorbing portion 310 and the second heat absorbing portion 320 are configured as cooling tubes 330. The cooling tubes 330 within the combustion chamber 110 are sequentially connected to allow coolant to circulate between the cooling tubes 330. The circulation of the cooling tubes 330 allows the coolant to remove heat from locations through which it circulates, achieving cooling while simplifying the heat absorbing structure and facilitating operation.

[0070] Specifically, in one embodiment, the shell 100 includes two first shell plates 120 arranged opposite to each other, and two connecting shell plates 130 connecting the two first shell plates 120. The two first shell plates 120 and the two connecting shell plates 130 together enclose the entire circumferential side wall of the combustion chamber 110; the opposite surfaces of the two first shell plates 120 constitute two first side walls 111, and a channel is formed inside the connecting shell plate 130, which is used to connect each of the cooling pipes 330 in sequence.

[0071] The mounting method between the first shell plate 120 and the connecting shell plate 130 is not limited in this design and can be integrally formed, or connected by screwing, snapping, adhesive fixing, etc. The first shell plate 120 and the connecting shell plate 130 can be specifically manifested as the outer shell of the burner, or specifically manifested as the inner shell accommodated in the inner cavity of the housing 100.

[0072] Since the first heat absorbing portion 310 and the second heat absorbing portion 320 are not provided on the connecting shell plate 130 , the channel is provided on the connecting shell plate 130 , so that the two groups of first heat absorbing portions 310 , or the first heat absorbing portion 310 and the second heat absorbing portion 320 on the two first side walls 111 can be connected.

[0073] There are various arrangements for the channels. For example, of the two connecting shell plates 130, the channel provided on one connecting shell plate 130 is used to connect the two groups of cooling pipes 330 on the two first side walls 111, while the channel provided on the other connecting shell plate 130 is used to connect the multiple cooling pipes 330 on the same first side wall 111. The specific shape and size of the channel can be adjusted according to actual needs, for example, it can be configured as a straight channel or a curved channel.

[0074] Specifically, when the thickness of the connecting shell plate 130 is sufficient, the above-mentioned channel can be directly opened inside the connecting shell plate 130; or, a pipeline structure can be optionally fixed on the plate surface of the connecting shell plate 130, and the pipeline structure constitutes the passage of the connecting shell plate 130; in this embodiment, the connecting shell plate 130 includes two connecting single plates 131 stacked in sequence in the direction of approaching and away from the combustion chamber 110; wherein, one of the two connecting single plates 131 is provided with a groove 132, and the other is provided to cover the groove 132 to define the channel. The two connecting single plates 131 are detachably connected, which facilitates the disassembly, replacement and cleaning of the channel; by providing a groove 132 in one of the two connecting single plates 131 and the other as a cover plate, different specifications of the groove 132 can be replaced according to actual needs, thereby obtaining channels of different sizes and shapes.

[0075] Furthermore, the connecting plate 131 forming the groove 132 can be arranged to be located on the side of the connecting plate 131 forming the cover plate facing away from the combustion chamber 110, so that only the connecting plate 131 forming the groove 132 needs to be disassembled and assembled, without affecting the function of the connecting plate 131 forming the cover plate to connect the two first shell plates 120 and support the shape of the combustion chamber 110.

[0076] Further, see Figures 1 to 3 In one embodiment, the multiple nozzles 210 of each nozzle group 200 are linearly arranged along the circumference of the combustion chamber 110, and the second heat absorption portion 320 is arranged side by side with the multiple nozzles 210 of the adjacent nozzle group 200.

[0077] Specifically, the first shell plate 120 can be provided with a plurality of mounting holes spaced apart along its length, and the plurality of nozzles 210 of each nozzle group 200 can be mounted on the plurality of mounting holes in a one-to-one correspondence. The distance between each two adjacent nozzles 210 can be set uniformly. The linear arrangement of the plurality of nozzles 210 can balance the kinetic energy of the gas and / or air ejected by each nozzle 210, so that the gas and / or air is fully mixed with the preheated flue gas. The second heat absorption portion 320 is configured to be elongated, such as a cooling pipe 330, which is arranged side by side with the plurality of nozzles 210 of the adjacent nozzle group 200, and can cool down each nozzle 210 of the nozzle group 200.

[0078] Furthermore, in one embodiment, the orthographic projections of the plurality of nozzles 210 of the two nozzle groups 200 on the same first side wall 111 are staggered, which can achieve staggered airflows ejected from the two nozzle groups 200 arranged on the two first side walls 111, thereby facilitating more complete and uniform entrainment and mixing of the jet airflow and the smoke.

[0079] Furthermore, in one embodiment, the first heat absorbing portion 310 and / or the second heat absorbing portion 320 are configured as cooling tubes 330. A welding groove 115 is recessed into the sidewall of the combustion chamber 110, and the cooling tubes 330 are welded and secured to the welding groove 115. The groove-shaped configuration of the welding groove 115 firstly positions the cooling tubes 330, positioning the cooling tubes 330 in a predetermined position and ensuring accurate installation of the cooling tubes 330. Furthermore, the welding groove 115 provides sufficient space for soldering when the cooling tubes 330 are welded and secured to the first shell plate 120, thereby facilitating a secure weld.

[0080] See also Figures 1 to 2 In one embodiment, the first heat absorbing portion 310 and / or the second heat absorbing portion 320 is configured as a cooling tube 330; the cross-section of the cooling tube 330 is oblong. The oblong shape, for example, an elliptical shape, can maximize the heat absorption area of ​​the cooling tube 330 within the combustion chamber 110, thereby helping to optimize the heat absorption effect of the cooling tube 330.

[0081] It can be understood that in the above embodiment, the burner can be a burner for conventional combustion; or, the burner can be configured as a burner capable of achieving high-temperature air combustion. Specifically, the combustion chamber 110 includes a first combustion chamber (not shown in the drawings) and a second combustion chamber (not shown in the drawings) that are connected in sequence; the burner also includes a preheating burner (not shown in the drawings), which is provided in the first combustion chamber and is used to receive gas and air and heat them to a preset target temperature before providing them to the second combustion chamber; the nozzle group 200 is provided on the side wall of the second combustion chamber and is used to inject air and / or gas into the second combustion chamber to react with the flue gas heated to the preset target temperature delivered by the first combustion chamber, so that a high-temperature air combustion reaction occurs in the second combustion chamber.

[0082] It can be understood that the main characteristics of high-temperature air combustion are: the chemical reaction needs to occur in a high-temperature, low-oxygen environment, the reactant temperature is higher than its auto-ignition temperature, and the maximum temperature rise during the combustion process is lower than its auto-ignition temperature, and the oxygen volume fraction is diluted to an extremely low concentration by the combustion products. Compared with conventional combustion, under this combustion state, the pyrolysis of the fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature in the entire furnace is very uniform, the peak combustion temperature is low and the noise is extremely low, and the pollutant NOx and CO emissions are greatly reduced. However, achieving high-temperature air combustion requires certain conditions: it is necessary to ensure that the oxygen concentration in most areas of the furnace is lower than a certain value, generally lower than 5% to 10%, to ensure that the gas is fully combusted and burns evenly, and the temperature must be higher than the auto-ignition point of the fuel to maintain auto-ignition.

[0083] The first combustion chamber and the second combustion chamber are connected in sequence, and the gas outlet of the first combustion chamber is connected to the gas inlet of the second combustion chamber (i.e., the gas inlet 112 mentioned above), so that the gas flow composed of gas and / or air, and high-temperature flue gas can flow between the first combustion chamber and the second combustion chamber. Specifically, the mixed gas inlet of the combustion chamber 110 is arranged at the first combustion chamber, and can be optionally arranged at the side of the first combustion chamber away from the second combustion chamber, so that the first combustion chamber can receive the mixed gas provided by the premixed gas; the flue gas outlet of the combustion chamber 110 is arranged at the second combustion chamber, and can be optionally arranged at the side of the second combustion chamber away from the first combustion chamber, so that the high-temperature flue gas generated by the second combustion chamber can be discharged through the flue gas outlet after sufficient air combustion.

[0084] The first combustion chamber and the second combustion chamber may be formed on the same housing 100 or on different housings 100 , and the first combustion chamber and the second combustion chamber may be connected to each other by detachably connecting the different housings 100 .

[0085] The preheating burner is arranged in the first combustion chamber, and can be specifically arranged at the mixed gas inlet of the first combustion chamber; the preheating burner ignites the mixed gas in the first combustion chamber, causing the mixed gas to burn and form a preset high temperature in the area, thereby achieving high-temperature preheating and forming high-temperature flue gas.

[0086] The injector sprays gas and / or air toward the second combustion chamber. The gas is ignited by the high-temperature gas and continues to burn in the second combustion chamber, forming a jet combustion area. In addition, the gas and / or air injected at a preset speed cooperates with the above-mentioned high-temperature flue gas to form a suction effect in the second combustion chamber, forming a flue gas reflux area, so that part of the high-temperature flue gas (waste gas rich in N2 and CO2) circulates inside the second combustion chamber to dilute the reactants, and then fully dilutes the injected gas and air to form a lower oxygen concentration, reduce the combustion reaction rate, and continue to maintain a higher temperature in the second combustion chamber, ensuring that the temperature in the second combustion chamber is higher than the auto-ignition point of the fuel, achieving spontaneous combustion, and thus realizing high-temperature air combustion.

[0087] By preheating the air at high temperature and coordinating it with a high-speed jet to draw in and dilute the high-temperature flue gas, not only can the gas be fully burned, reducing pollutant emissions, but also the combustion in the second combustion chamber is more uniform, and the problem of local excessive combustion and noise generation will not occur.

[0088] As can be seen from the above, the target temperature of the high-temperature preheated air cannot be too low, and should be no less than 600 degrees Celsius. Generally, controlling it between 600 and 1200 degrees Celsius ensures that when the high-temperature gas contacts the airflow from the ejector, it will achieve good automatic combustion, eliminating the need for ignition. There are many ways to achieve high-temperature preheated air, such as controlling the heating time, controlling the gas-to-air ratio, maintaining heat, and increasing the residence time of the high-temperature gas in the second combustion chamber.

[0089] In addition, the present invention also provides a gas water heater, which can specifically be a gas wall-mounted boiler. The gas water heater includes a heat exchanger and the burner described above. Of course, the gas water heater also includes a main body structure, in which a heat exchange chamber and a smoke exhaust port connected to the heat exchanger are provided. The heat exchanger is disposed in the heat exchange chamber, and the smoke outlet of the burner is connected to the heat exchange chamber. The heat exchanger is connected to an external water source, such as tap water. The high-temperature smoke entering the heat exchange chamber through the smoke outlet of the burner carries sufficient heat to continuously exchange heat with the water in the heat exchanger, raising the water temperature to the desired level, thereby producing hot water.

[0090] The burner can be set independently of the main body of the gas wall-mounted boiler, and the connection and fixation between the burner and the main body of the gas wall-mounted boiler can be achieved by methods such as screw fixation and snap fixation, which is convenient for disassembly and replacement at any time; of course, the burner can also be used as a component of the main body of the gas wall-mounted boiler, and can be integrally formed with the main body, which is easy to process and makes the overall structure more compact.

[0091] The combustion chamber 110 and the heat exchange chamber can be independently provided. After sufficient combustion is achieved in the combustion chamber 110 and sufficient combustion flue gas is generated, the combustion flue gas is discharged into the heat exchange chamber through the connection between the combustion chamber 110 and the heat exchange chamber, thereby achieving the purpose of heat exchange. Of course, the combustion chamber 110 and the heat exchange chamber can also be provided as an integrated unit. The combustion chamber 110 can constitute at least part of the heat exchange chamber, and at least part of the heat exchange tubes can be directly provided in the combustion chamber 110 to achieve a better heat exchange effect.

[0092] In addition, since the high-temperature flue gas generated by the burner partially condenses to produce acidic condensate water when passing through the heat exchanger, in order to meet the emission standards, it needs to be neutralized with acid and alkali before being discharged. Therefore, the gas water heater also includes a condensate neutralizer, which is arranged at the condensate outlet of the gas water heater.

[0093] It should be noted that the detailed structure of the burner in the gas water heater can refer to the embodiment of the above-mentioned burner, which will not be repeated here; since the above-mentioned burner is used in the gas water heater of the present invention, the embodiment of the gas water heater of the present invention includes all the technical solutions of all the embodiments of the above-mentioned burner, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0094] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that: include: A housing is formed with a combustion chamber, wherein the combustion chamber includes two first side walls arranged opposite to each other; an injector, comprising a nozzle group including a plurality of nozzles, wherein the nozzles are used to inject a gas flow containing gas and / or air into the combustion chamber; as well as, The heat absorbing structure includes a first heat absorbing portion; wherein the nozzle group and the first heat absorbing portion are arranged on the two first side walls so that the direction of the airflow ejected by the nozzle deviates from the direction in which the nozzle faces the first heat absorbing portion; A flue gas flow channel is defined between the two first side walls, and the flue gas flow channel has an air inlet end and an air outlet end; The first heat absorbing portion is provided on a side of the nozzle group away from the air inlet end; The first side wall includes a first installation wall for installing the first heat absorption part. In the direction away from the air inlet end, the first installation wall is inclined and gradually away from the first side wall where the nozzle group is located.

2. The burner according to claim 1, wherein The heat absorbing structure further includes a second heat absorbing portion, which is disposed adjacent to the nozzle group.

3. The burner according to claim 2, characterized in that A flue gas flow passage is defined between the two first side walls, and at least two second heat absorbing parts are spaced apart on the flue gas flow passage; The nozzle assembly is arranged between the two second heat absorbing parts.

4. The burner according to claim 2, wherein There are at least two nozzle groups, and the two nozzle groups are arranged on the two first side walls. There are at least two first heat absorption parts corresponding to the two nozzle groups. The first heat absorption parts are arranged adjacent to the nozzle groups on the same first side wall to constitute the second heat absorption parts of the nozzle groups on the same first side wall.

5. The burner according to claim 2, wherein The first heat absorbing part and the second heat absorbing part are configured as cooling pipes; The cooling pipes in the combustion chamber are connected in sequence so that the coolant can circulate between the cooling pipes.

6. The burner according to claim 5, characterized in that The housing includes two first shell plates arranged opposite to each other and two connecting shell plates connecting the two first shell plates, wherein the two first shell plates and the two connecting shell plates together enclose the entire circumferential side wall of the combustion chamber; The opposite surfaces of the two first shell plates constitute two first side walls. A channel is formed inside the connecting shell plate, and the channel is used to connect the cooling pipes in sequence.

7. The burner according to claim 6, characterized in that The connecting shell plate includes two connecting single plates stacked in sequence in the direction of approaching and away from the combustion chamber; Wherein, one of the two connecting plates is provided with a groove, and the other one is arranged to cover the groove to define the channel.

8. The burner according to claim 4, wherein The multiple nozzles of each nozzle group are linearly arranged along the circumference of the combustion chamber, and the second heat absorption portion located on the same first side wall is arranged side by side with the multiple nozzles of the nozzle group.

9. The burner according to claim 8, characterized in that The orthographic projections of the plurality of nozzles of the two nozzle groups on the same first side wall are staggered.

10. The burner according to claim 2, wherein The first heat absorbing part and / or the second heat absorbing part is configured as a cooling pipe; A welding groove is recessed on the side wall of the combustion chamber, and the cooling pipe is welded and fixed to the welding groove.

11. The burner according to claim 2, wherein The first heat absorbing part and / or the second heat absorbing part is configured as a cooling pipe; The cross section of the cooling tube is oblate.

12. The burner according to claim 1, wherein The combustion chamber includes a first combustion chamber and a second combustion chamber that are connected in sequence; The burner further comprises a preheating burner, which is provided in the first combustion chamber and is used to receive gas and air and heat them to a preset target temperature before supplying them to the second combustion chamber; The nozzle group is arranged on the side wall of the second combustion chamber, and is used to inject air and / or gas into the second combustion chamber to react with the flue gas heated to a preset target temperature delivered by the first combustion chamber, so that a high-temperature air combustion reaction occurs in the second combustion chamber.

13. A gas water heater, characterized in that: The burner comprises a main body, a heat exchanger and the burner according to any one of claims 1 to 12, wherein a heat exchange chamber is provided in the main body, and the heat exchanger is provided in the heat exchange chamber.

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