A gas burner for a gas water heater and a gas water heater

Abstract

The application belongs to the technical field of gas water heaters, and discloses a burner for a gas water heater and the gas water heater. The burner comprises a fire grate and a premix ring, the fire grate has a premix cavity, the premix cavity has an air inlet and an air outlet, the air inlet is used for air and gas to enter the premix cavity, the premix ring comprises an outer ring part and a flow sheet, at least two guide vanes are arranged on the inner wall of the outer ring part in a circumferential direction, the outer ring part is rotatably installed in the premix cavity, the guide vanes have guide surfaces arranged towards the air inlet of the premix cavity, and the guide surfaces can drive the outer ring part to rotate relative to the premix cavity under the action of the gas entering from the air inlet. Compared with the premix cavity in the prior art, the rotation of the premix ring can stir the air and the gas at the air inlet of the premix cavity, thereby playing a role of preliminarily mixing the air and the gas, making the air and the gas more uniformly mixed, and further ensuring that the mixed gas can be fully combusted, reducing off-flame shaking, and reducing combustion noise.

Description

Technical Field

[0001] This application relates to the field of gas water heater technology, specifically to a burner for a gas water heater and a gas water heater. Background Technology

[0002] A gas water heater is a household hot water device that uses gas as fuel and heats cold water for users through combustion. Its working principle is as follows: When the user turns on the hot water tap, the water flows through the water flow sensor inside the water heater. After the sensor detects the water flow, it transmits a signal to the controller. The controller triggers the ignition device and opens the gas valve at the same time, so that the gas and air are mixed in a certain proportion and enter the combustion chamber. The mixture is ignited and burned. The high-temperature flue gas produced passes through a heat exchanger and transfers heat to the cold water flowing through the heat exchanger. The cold water absorbs the heat and rises in temperature, becoming hot water that flows out from the outlet. The exhaust gas produced by combustion is discharged outdoors through the exhaust system.

[0003] As the core component of a gas water heater, the stability of its performance plays a crucial role in the overall performance of the gas water heater. Existing technology, Chinese Patent 202323205396.7, discloses a burner and a gas water heater. The burner includes a burner plate and a cover. The burner plate body has a primary premixing chamber. Due to the suboptimal structure of the premixing chamber, the flame burning on the burner plate is prone to flame detachment and flickering, and the combustion noise is relatively high, which easily leads to incomplete combustion of the gas.

[0004] This section provides background information related to this application, which is not necessarily prior art. Utility Model Content

[0005] The purpose of this application is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this application is to provide a burner and a gas water heater that can fully premix the gas and air entering the burner burner, effectively improving the stability of the combustion flame, reducing combustion noise, and making the gas combustion more complete.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a burner for a gas water heater, comprising:

[0008] A burner has a premixing chamber inside, the premixing chamber having an air inlet for supplying air and fuel gas into the premixing chamber;

[0009] A premixing ring includes an outer ring portion and guide vanes. At least two guide vanes are arranged circumferentially on the inner wall of the outer ring portion. The outer ring portion is rotatably mounted in the premixing chamber about its axis. The guide vanes have a guide surface facing the air inlet of the premixing chamber. The guide surface can drive the outer ring portion to rotate relative to the premixing chamber under the action of gas entering from the air inlet.

[0010] As an alternative to the burner for the gas water heater, each of the guide surfaces is inclined relative to the axial direction of the outer ring in the axial direction of the outer ring.

[0011] As an alternative to the burner for the gas water heater, in the radial direction of the outer ring, each of the guide surfaces is inclined from the inside to the outside, and all guide surfaces exhibit the same direction of rotation.

[0012] As an optional solution for the burner of the gas water heater, a sealing ring is provided between the outer peripheral surface of the outer ring and the inner wall of the premixing chamber.

[0013] As an optional solution for the burner of the gas water heater, the premixing ring further includes a central shaft, which is coaxially arranged with the outer ring. One end of the guide vane is connected to the inner wall of the outer ring, and the other end is connected to the outer wall of the central shaft.

[0014] As an alternative to the burner for the gas water heater, in the axial direction of the outer ring portion, the length of the central axis is less than the length of the outer ring portion.

[0015] As an optional solution for the burner of the gas water heater, the premixing chamber includes a contraction section and a first diversion section. The large end of the contraction section forms the air inlet, and the small end of the contraction section is connected to the first diversion section. The premixing ring is installed at the connection between the contraction section and the first diversion section.

[0016] As an alternative to the burner for the gas water heater, a portion of the premixing ring is located within the contraction section, and a portion of the premixing ring is located within the first diversion section.

[0017] Secondly, this application discloses a gas water heater, comprising:

[0018] The housing has an internal installation space;

[0019] The gas water heater burner described above is installed within the installation space;

[0020] A gas nozzle is installed in the installation space, and the center line of the outlet of the gas nozzle is parallel to or coincides with the center line of the inlet of the premixing chamber of the burner.

[0021] A fan is installed outside the housing, and the air outlet of the fan is connected to the installation space.

[0022] As an optional feature of the gas water heater, the centerline of the air inlet extends horizontally, and the fan is located below the air inlet.

[0023] The beneficial effects of this application are as follows:

[0024] The burner provided in this application includes a burner bar and a premixing ring. The burner bar has a premixing chamber with an inlet and an outlet. The inlet is used to supply air and fuel gas into the premixing chamber. The premixing ring includes an outer ring and guide vanes. At least two guide vanes are arranged circumferentially on the inner wall of the outer ring. The outer ring is rotatably mounted in the premixing chamber about its axis. The guide vanes have a guide surface facing the inlet of the premixing chamber. Under the action of the gas entering from the inlet, the guide surface can drive the outer ring to rotate relative to the premixing chamber. Compared with the premixing chamber of the prior art, the rotation of this premixing ring can fully mix the air and fuel gas at the inlet of the premixing chamber, thereby playing a role in the initial mixing of air and fuel gas, making the air and fuel gas mixture more uniform, thus ensuring that the mixed gas can be fully combusted, reducing flame flickering, and reducing combustion noise.

[0025] The gas water heater provided in this application, by applying the above-mentioned burner, can fully premix the gas and air entering the burner burner, which can effectively improve the stability of the combustion flame, reduce combustion noise, and make the gas combustion more complete. Attached Figure Description

[0026] Figure 1 This is a cross-sectional schematic diagram of a gas water heater provided in an embodiment of this application.

[0027] Figure 2 This is a cross-sectional schematic diagram of a burner provided in an embodiment of this application.

[0028] Figure 3 This is a partial cross-sectional view of the burner provided in an embodiment of this application from another direction.

[0029] Figure 4 yes Figure 2 Enlarged view of the burner at the premixing ring.

[0030] Figure 5 This is a front view schematic diagram of the premixed ring provided in the embodiments of this application.

[0031] In the picture:

[0032] 100. Housing; 200. Burner; 300. Gas nozzle; 400. Fan; 500. Heat exchanger; 600. Drain pipe;

[0033] 1. Burner; 11. Burner body; 110. Premixing chamber; 1101. Air inlet; 1102. Air outlet; 1103. Contraction section; 1104. First drainage section; 1105. Second drainage section; 12. Cover; 121. Flame hole;

[0034] 2. Premixing ring; 21. Outer ring; 22. Guide vane; 23. Central shaft. Detailed Implementation

[0035] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0036] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0038] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0039] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0040] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0041] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0042] like Figure 1 As shown, this application provides a gas water heater, which includes a housing 100, a burner 200, a gas nozzle 300, and a fan 400. The housing 100 has an installation space, and the burner 200 and the gas nozzle 300 are both installed in the installation space. The gas nozzle 300 is used to connect to the gas supply system and supply gas to the burner 200. The fan 400 is installed outside the housing 100 and below the burner 200, and the air outlet of the fan 400 is connected to the installation space for supplying oxygen-containing air to the installation space.

[0043] In addition, the gas water heater also includes an ignition device (not shown in the figure) and a heat exchanger 500. The ignition device is used to ignite the gas-air mixture in the burner 200, thereby causing the burner 200 to produce a flame. The heat exchanger 500 is located above the burner 200, and the flame produced by the burner 200 is used to heat the water in the heat exchanger 500 to obtain the desired hot water.

[0044] Furthermore, the gas water heater also includes an exhaust pipe, which is located above the housing 100 and is used to connect to the kitchen exhaust system. The smoke generated after the combustion of the gas-air mixture inside the housing 100 is discharged from the exhaust pipe through the kitchen exhaust system.

[0045] The working principle of this gas water heater is as follows: When the user turns on the hot water tap, the water flows through the water flow sensor inside the water heater. After the sensor detects the water flow, it transmits a signal to the controller. The controller triggers the ignition device and opens the gas valve at the same time, so that the gas and air are mixed in a certain proportion and then enter the burner 200. The mixed gas is ignited and burned. The high-temperature flue gas produced passes through the heat exchanger 500 and transfers heat to the water flowing through the heat exchanger 500. The water absorbs the heat and rises in temperature, becoming hot water that flows out from the outlet. The exhaust gas produced by combustion is discharged outdoors through the exhaust system.

[0046] In related technologies, the burner of a gas water heater consists of several burners. Due to the insufficient optimization of the premixing chamber structure of the burners, the flame burning on the burners is prone to flame detachment and shaking, and the combustion noise is relatively large, which in turn easily leads to incomplete combustion of gas.

[0047] To solve or mitigate the above problems, such as Figures 2 to 3 and combined Figure 1 As shown, this application also provides a burner 200, which includes a burner 1 and a premixing ring 2. The burner 1 has a premixing chamber 110, which has an air inlet 1101 and an air outlet 1102. The air inlet 1101 is used to supply air and fuel gas into the premixing chamber 110, and an ignition device is provided at the air outlet 1102 to ignite the fuel gas-air mixture discharged from the air outlet 1102. The premixing ring 2 is rotatably installed in the premixing chamber 110 about its axis. When the premixing ring 2 rotates under the action of the gas entering through the air inlet 1101, the rotation of the premixing ring 2 can stir the air and fuel gas at that location, thereby playing a preliminary role in mixing the air and fuel gas, making the air and fuel gas mixture more uniform, and thus ensuring that the mixed gas can be fully combusted, reducing flame flickering, and reducing combustion noise.

[0048] The centerline of the outlet of the gas nozzle 300 is parallel or coincident with the centerline of the air inlet 1101 of the premixing chamber 110. On the one hand, this ensures that the gas can smoothly enter the premixing chamber 110 through the air inlet 1101. On the other hand, the high-speed flowing gas can form a negative pressure at the air inlet 1101, so that the air in the installation space of the housing 100 naturally converges at the air inlet 1101 and enters the air inlet 1101 along with the gas.

[0049] The air inlet 1101 of the premixing chamber 110 is located on the side wall of the burner 1, and the centerline of the air inlet 1101 extends horizontally. The air outlet 1102 of the premixing chamber 110 is located above the burner 1, and the fan 400 is located below the air inlet 1101. Both fuel gas and air enter the premixing chamber 110 through the air inlet 1101 and flow along the inner wall of the premixing chamber 110 to the air outlet 1102. It should be noted that... Figure 2 The air inlet 1101 of the premixing chamber 110 is located on the right side wall of the burner 1. However, in the actual installation state, the air inlet 1101 may not be on the right side, but may be on the left side. The specific location depends on the actual installation state and is not limited here.

[0050] The burner 1 includes a burner body 11 and a cover 12. The burner body 11 has a premixing chamber 110 inside. The cover 12 covers the burner body 11 and is located at the air outlet 1102 of the premixing chamber 110. The cover 12 has multiple flame holes 121, which can be used to evenly distribute the flame to ensure that the flame is evenly distributed below the heat exchanger 500, thereby achieving uniform heating of the heat exchanger 500.

[0051] The premixing chamber 110 includes a contraction section 1103 and a first guide section 1104. The large end of the contraction section 1103 forms an air inlet 1101, and the small end of the contraction section 1103 is connected to the first guide section 1104. The premixing ring 2 is installed at the connection between the contraction section 1103 and the first guide section 1104. Because the mixed gas achieves an acceleration effect under the guide effect of the contraction section 1103, in other words, the flow velocity of the mixed gas at the large end of the contraction section 1103 is less than the flow velocity at the small end of the contraction section 1103. When the flow velocity of the mixed gas is higher, the force exerted by the mixed gas on the premixing ring 2 will also increase, thereby increasing the rotational speed of the premixing ring 2, which in turn improves the premixing effect of the premixing ring 2 and ensures thorough mixing of air and fuel gas.

[0052] like Figure 4 Combination Figure 3 As shown, a portion of the premixed ring 2 is located within the contraction section 1103, and another portion of the premixed ring 2 is located within the first drainage section 1104, which allows the premixed ring 2 to be stably installed within the premixing chamber 110, thereby improving the stability of the premixed ring 2.

[0053] The premixing chamber 110 also includes a second guide section 1105. One end of the second guide section 1105 is connected to the end of the first guide section 1104 away from the contraction section 1103, and the other end of the second guide section 1105 extends in the direction of the contraction section 1103 and is set at an acute angle to the first guide section 1104. With this configuration, when air and fuel flow through the bend where the first guide section 1104 and the second guide section 1105 meet, the air and fuel will be further and more fully mixed under the action of the inner wall of the bend, ensuring that the mixed gas will be fully combusted subsequently.

[0054] like Figure 5 and combined Figure 4 As shown, the premixed ring 2 provided in this application includes an outer ring portion 21 and guide vanes 22. At least two guide vanes 22 are arranged circumferentially on the inner wall of the outer ring portion 21. The outer ring portion 21 is rotatably mounted in the premixing chamber 110 about its axis. The guide vanes 22 have a guide surface facing the air inlet 1101 of the premixing chamber 110. Under the action of the gas entering from the air inlet 1101, the guide surface can drive the outer ring portion 21 to rotate relative to the premixing chamber 110. It can be understood that the rotation principle of the premixed ring 2 utilizes the lift effect and momentum transfer in aerodynamics to convert the momentum of the mixed gas into the mechanical energy of the rotation of the premixed ring 2.

[0055] In the axial direction of the outer ring 21, each guide surface is inclined relative to the axial direction of the outer ring 21 to ensure that the guide surface can face the air inlet 1101, so that the mixed gas entering from the air inlet 1101 can fully act on the guide surface, thereby providing power for the rotation of the premixed ring 2.

[0056] In the radial direction of the outer ring 21, each guide surface is inclined from the inside to the outside, and all guide surfaces exhibit the same rotation direction. This design can further improve the kinetic energy conversion effect of the guide surface, ensure that the premixing ring 2 can rotate smoothly under the action of gas, and improve the mixing effect of the premixing ring 2.

[0057] To prevent gas from flowing into the first guide section 1104 from between the outer peripheral surface of the outer ring 21 and the inner wall of the premixing chamber 110, a sealing ring is provided between the outer peripheral surface of the outer ring 21 and the inner wall of the premixing chamber 110 to ensure that the gas passes through the gap between the guide plates 22, preventing gas penetration and improving the effect of uniform gas mixing.

[0058] In this embodiment, the premixing ring 2 further includes a central shaft 23, which is coaxially arranged with the outer ring portion 21. One end of the guide vane 22 is connected to the inner wall of the outer ring portion 21, and the other end is connected to the outer wall of the central shaft 23. In other embodiments, the premixing ring 2 may not include the central shaft 23, and the guide vane 22 may only be connected to the inner wall of the outer ring portion 21, and fixed by this connection position.

[0059] In the axial direction of the outer ring 21, the length of the central shaft 23 is less than the length of the outer ring 21, reducing the space ratio of the central shaft 23 within the outer ring 21, allowing more air and fuel gas to enter the first guide section 1104 through the gaps between the guide vanes 22. In one embodiment, the length of the central shaft 23 can be set to no more than half the length of the outer ring 21, which reduces the space ratio of the central shaft 23 within the outer ring 21, allowing more air and fuel gas to enter the outer ring 21 and be fully mixed under the stirring action of the guide vanes 22.

[0060] The burner 200 provided in this application provides a premixing ring 2 in the premixing chamber 110 of the burner 1. The premixing ring 2 can rotate relative to the premixing chamber 110 under the action of airflow, thereby fully stirring and premixing the gas and air flowing through the premixing ring 2, which can make the combustion flame at the flame hole 121 more stable, reduce combustion noise, and make the gas combustion more complete.

[0061] In addition, when the user requires a higher water temperature, such as 60°C or above, the controller controls the fan 400 to provide more air and the gas nozzle 300 to provide more gas, so that more air and gas enter the premixing chamber 110 from the air inlet 1101. When the gas volume and gas flow rate are faster, the premixing ring 2 will also rotate faster under the action of the gas, thereby improving the uniformity of stirring and premixing. After being premixed evenly, it enters the flame area for full combustion, making the combustion flame more stable, reducing combustion noise, and making the gas combustion more complete.

[0062] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A burner for a gas water heater, characterized in that, include: The burner (1) has a premixing chamber (110) inside, the premixing chamber (110) has an air inlet (1101) for supplying air and fuel gas into the premixing chamber (110). The premixing ring (2) includes an outer ring (21) and guide vanes (22). At least two guide vanes (22) are arranged circumferentially on the inner wall of the outer ring (21). The outer ring (21) is rotatably mounted in the premixing chamber (110) about its axis. The guide vanes (22) have a guide surface facing the air inlet (1101) of the premixing chamber (110). The guide surface can drive the outer ring (21) to rotate relative to the premixing chamber (110) under the action of the gas entering from the air inlet (1101).

2. The burner for a gas water heater according to claim 1, characterized in that, In the axial direction of the outer ring (21), each of the guide surfaces is inclined relative to the axial direction of the outer ring (21).

3. The burner for a gas water heater according to claim 2, characterized in that, In the radial direction of the outer ring (21), each of the guide surfaces is inclined from the inside to the outside, and all the guide surfaces exhibit the same direction of rotation.

4. The burner for a gas water heater according to claim 1, characterized in that, A sealing ring is provided between the outer peripheral surface of the outer ring (21) and the inner wall of the premixing cavity (110).

5. The burner for a gas water heater according to claim 1, characterized in that, The premixed ring (2) also includes a central shaft (23), which is coaxially arranged with the outer ring (21). One end of the guide vane (22) is connected to the inner wall of the outer ring (21), and the other end is connected to the outer wall of the central shaft (23).

6. The burner for a gas water heater according to claim 5, characterized in that, In the axial direction of the outer ring (21), the length of the central axis (23) is less than the length of the outer ring (21).

7. The burner for a gas water heater according to any one of claims 1-6, characterized in that, The premixing chamber (110) includes a contraction section (1103) and a first drainage section (1104). The large end of the contraction section (1103) forms the air inlet (1101), and the small end of the contraction section (1103) is connected to the first drainage section (1104). The premixing ring (2) is installed at the connection between the contraction section (1103) and the first drainage section (1104).

8. The burner for a gas water heater according to claim 7, characterized in that, A portion of the premixed ring (2) is located within the contraction section (1103), and a portion of the premixed ring (2) is located within the first drainage section (1104).

9. A gas water heater, characterized in that, include: Housing (100) having an installation space therein ； The gas water heater burner as described in any one of claims 1-8 is installed within the installation space; A gas nozzle (300) is installed in the installation space, and the center line of the outlet of the gas nozzle (300) is parallel to or coincides with the center line of the air inlet (1101) of the premixing chamber (110) of the burner. A fan (400) is installed outside the housing (100), and the air outlet of the fan (400) is connected to the installation space.

10. The gas water heater according to claim 9, characterized in that, The centerline of the air inlet (1101) extends horizontally, and the fan (400) is located below the air inlet (1101).

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