Gas stove and burner thereof
By setting pressure boosting holes and optimizing the air intake structure on the injector assembly of the gas stove burner, the problem of insufficient air supply to the burner was solved, resulting in more efficient combustion, lower CO emissions, and enhanced flame stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2025-06-10
- Publication Date
- 2026-07-10
AI Technical Summary
The burners of existing gas stoves cannot provide enough air, resulting in excessive carbon monoxide levels, which affects the health of users and reduces combustion efficiency.
A pressure boosting hole and a primary air intake hole are installed on the injector tube assembly of the burner head. The pressure boosting hole increases the air intake volume, and the air intake hole formed by the arc-shaped outer wall and the damper end plate optimizes the airflow and promotes the full mixing of air and gas.
It improves combustion efficiency, reduces carbon monoxide emissions, enhances flame jet speed, avoids flameout or backfire, and adapts to high-load combustion requirements.
Smart Images
Figure CN224479630U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gas stove technology, and in particular to gas stoves and their burners. Background Technology
[0002] In modern family kitchens, gas stoves are indispensable cooking tools, and improving their thermal efficiency has always been a key focus of technological innovation. However, while improving thermal efficiency, it is necessary to ensure that the CO content meets national standards (CO content < 0.05%). A lower CO content in the burner can further improve combustion thermal efficiency. And the reduction in CO content can be maintained by ensuring that there is enough air available during the combustion process.
[0003] In related technologies, the gas stove burner has a limited air intake, which cannot provide enough air to reduce CO content, easily causing CO content to exceed the standard and posing a threat to the user's health. Utility Model Content
[0004] Therefore, it is necessary to provide a gas stove and its burner to address the problem that the burner cannot provide enough air to reduce CO content.
[0005] A burner head, the burner head comprising:
[0006] An ejector tube assembly has an air inlet and an air outlet, and a pressure boosting hole is provided on the side wall of the ejector tube assembly near the air inlet.
[0007] A damper end plate is provided on the air inlet end of the ejector tube assembly, and a primary air inlet and a gas outlet are provided on the damper end plate.
[0008] The primary air inlet and the booster inlet are configured to allow air to enter, and the gas inlet is used to connect to a gas nozzle.
[0009] In one embodiment, the pressurization hole extends through the ejector assembly along the axial direction of the ejector assembly and near the damper end plate, with the damper end plate covering the pressurization hole.
[0010] In one embodiment, a plurality of pressurization holes are sequentially formed on the sidewall of the ejector assembly along the circumferential direction.
[0011] In one embodiment, a portion of the outer wall of the ejector assembly located at the air inlet extends axially toward the damper end plate to form an arc-shaped outer wall. The damper end plate covers the air inlet of a portion of the ejector assembly, and the two ends of the arc-shaped outer wall in the circumferential direction abut against the damper end plate respectively. A primary air inlet is formed between the damper end plate and the arc-shaped outer wall.
[0012] In one embodiment, the primary air inlet formed between the damper end plate and the arc-shaped outer wall and the primary air inlet on the damper end plate are located on opposite sides of the gas outlet.
[0013] In one embodiment, the gas inlet is located on the axis of the ejector tube, and the primary air inlet formed between the damper end plate and the arc-shaped outer wall is symmetrical with respect to the gas inlet.
[0014] In one embodiment, the curvature of the arcuate outer wall is less than 180 degrees.
[0015] In one embodiment, the ejector assembly includes two ejector tubes spaced apart, the air inlet ends of the two ejector tubes are connected into a single structure by a connector, and the damper end plates of the two ejector tubes are connected into a single structure.
[0016] Each ejector tube is provided with an arc-shaped outer wall, and the two arc-shaped outer walls are located on opposite sides of the two ejector tubes, with the damper end plate located between the two arc-shaped outer walls.
[0017] In one embodiment, the damper end plate is connected to the connector.
[0018] In one embodiment, the two ends of the arc-shaped outer wall along the circumferential direction are respectively provided with the pressure boosting holes, and the two pressure boosting holes are symmetrical about the center of the ejector tube.
[0019] A gas stove includes a burner and a burner head. The burner head includes a burner head front end, which is detachably disposed on the side of the injector tube assembly away from the air damper end plate. The burner is disposed on the burner head front end and has a secondary air inlet.
[0020] The aforementioned gas stove and its burner have a primary air inlet on the end face of the injector assembly. Air enters the injector assembly through the primary air inlet, while gas is injected into the gas orifice from the gas nozzle. The air and gas mix within the injector assembly and then enter the burner front end for combustion from the outlet end of the injector assembly. A pressure boosting orifice is provided on the injector assembly. This orifice increases the air intake, further promoting combustion, improving combustion efficiency, and reducing CO emissions. The pressure boosting orifice is located on the side wall of the injector assembly near the air inlet end. The airflow direction entering through the pressure boosting orifice differs from that entering through the primary air inlet. Therefore, when both streams of air flow into the injector assembly simultaneously, they collide and mix, increasing the pressure within the injector assembly, promoting thorough mixing of air and gas, improving combustion efficiency, and reducing CO emissions. Furthermore, the increased pressure of the pressurized mixture results in a higher flame jet speed, resisting external airflow interference, preventing flameout or backfire, and adapting to high-load combustion demands. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the burner head in one embodiment.
[0022] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the central furnace head.
[0023] Figure 3 for Figure 1 Side view of the central furnace head.
[0024] Figure 4 This is a schematic diagram of the burner head in another embodiment.
[0025] Figure 5 for Figure 4 A schematic diagram of the ejector tube assembly at the furnace head.
[0026] Reference numerals: 100, ejector tube assembly; 110, air inlet end; 120, air outlet end; 130, ejector tube; 131, inner ring ejector tube; 132, outer ring ejector tube; 133, pressure boosting hole; 134, arc-shaped outer wall; 140, connector; 200, damper end plate; 210, primary air inlet hole; 220, gas inlet hole; 300, burner head front end. Detailed Implementation
[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0033] The burner head includes a burner head front end, an injector tube assembly, and an air damper end plate. The burner head front end and the air damper end plate are respectively located at both ends of the injector tube assembly. A primary air intake hole is provided on the air damper end plate, and a burner distributor is provided on the burner head front end, with a secondary air intake hole on the burner distributor. During gas combustion, air is simultaneously introduced through the primary and secondary air intake holes. However, air introduced through the primary and secondary air intake holes is still insufficient to provide enough air to reduce CO content. Based on this, this application proposes a burner head in which a pressure boosting hole 133 is provided on the injector tube assembly 100. Outside air can be simultaneously drawn into the injector tube assembly 100 through the pressure boosting hole 133 and the primary air intake hole 210. The pressure boosting hole 133 is used to increase the air intake volume, which further promotes combustion, improves combustion efficiency, and reduces CO emissions.
[0034] See Figures 1-3 One embodiment of this application discloses a burner head, which includes an injector tube assembly 100 and an air damper end plate 200. The injector tube assembly 100 has an air inlet end 110 and an air outlet end 120, and a pressure boosting hole 133 is provided on the side wall of the injector tube assembly 100 near the air inlet end 110; the air damper end plate 200 is disposed at the air inlet end 110 of the injector tube assembly 100, and a primary air inlet hole 210 and a gas outlet 220 are provided on the air damper end plate 200; wherein, the primary air inlet hole 210 and the pressure boosting hole 133 are configured to allow air to enter, and the gas outlet 220 is used to connect to a gas nozzle.
[0035] In this embodiment, a primary air inlet 210 is provided on the end face of the ejector assembly 100. Air enters the ejector assembly 100 through the primary air inlet 210, and fuel gas is injected into the fuel gas port 220 from the fuel gas nozzle. After the air and fuel gas mix in the ejector assembly 100, they enter the front end of the burner head for combustion from the outlet end 120 of the ejector assembly 100. A pressure boosting port 133 is provided on the ejector assembly 100, allowing outside air to be drawn into the ejector assembly 100 simultaneously through the pressure boosting port 133 and the primary air inlet 210. The pressure boosting port 133 is used to increase the air intake, which further promotes combustion, improves combustion efficiency, and reduces CO emissions. Furthermore, the pressurization port 133 is located on the side wall of the injector assembly 100 near the air inlet end 110, while the primary air inlet 210 is located on the damper end plate 200. This means that the airflow direction entering through the pressurization port 133 is different from that entering through the primary air inlet 210. Therefore, when both streams of air flow into the injector assembly 100 simultaneously, they collide and mix, increasing the pressure within the injector assembly 100. This promotes thorough mixing of air and fuel, improves combustion efficiency, and reduces CO emissions. In addition, the increased pressure of the pressurized mixture and the higher flame velocity help resist external airflow interference (such as kitchen ventilation), preventing flameout or backfire, and adapting to high-load combustion requirements.
[0036] Specifically, the pressurization port 133 penetrates the outer wall of the ejector assembly 100, allowing outside air to enter the ejector assembly 100 through the pressurization port 133. Similarly, the primary air inlet and the gas inlet also penetrate the damper end plate 200.
[0037] In some embodiments, a portion of the outer wall of the ejector assembly 100 located at the air inlet 110 extends axially toward the damper end plate 200 to form an arcuate outer wall 134. The damper end plate 200 covers the air inlet 110 of the portion of the ejector assembly 100, and the two ends of the arcuate outer wall 134 in the circumferential direction abut against the damper end plate 200 respectively. A primary air inlet 210 is formed between the damper end plate 200 and the arcuate outer wall 134.
[0038] Compared to related technologies where the damper end plate 200 directly covers the entire air inlet end of the ejector assembly 100, in this embodiment, a primary air inlet hole 210 is formed between the damper end plate 200 and the arc-shaped outer wall 134. That is, the damper end plate 200 does not cover the entire air inlet end of the ejector assembly 100, thereby reducing the area of the damper end plate 200, reducing material usage, and lowering costs. Furthermore, the smaller size of the damper end plate 200 allows for a corresponding reduction in the size of the mold required in stamping or casting processes, reducing mold processing difficulty, shortening the mold manufacturing cycle, and lowering mold costs. Moreover, using the hole formed by the damper end plate 200 and the arc-shaped outer wall 134 as the primary air inlet hole 210 reduces the number of openings on the damper end plate 200, thereby reducing the process flow of the damper end plate 200 and improving production efficiency.
[0039] At the same time, this design allows the size of the air intake to be increased without being limited by the wall thickness of the damper end plate 200, thus increasing the air intake volume. Furthermore, since the arc-shaped outer wall 134 extends beyond the damper end plate 200, its guiding effect optimizes the airflow pattern, reducing eddies and resistance losses when the airflow enters the ejector assembly 100, allowing the airflow to enter the ejector assembly 100 more smoothly and further improving intake efficiency.
[0040] Of course, in other embodiments, the arc-shaped outer wall 134 can also be other shapes, as long as a gap is reserved between it and the damper end plate 200 to form a primary air inlet 210, for example, the arc shape is crescent-shaped.
[0041] Furthermore, in combination Figure 1 The primary air inlet 210 formed between the damper end plate 200 and the arc-shaped outer wall 134 and the primary air inlet 210 opened on the damper end plate 200 are located on opposite sides of the gas inlet 220.
[0042] In this embodiment, a primary air inlet 210 is provided on the damper end plate 200. The damper end plate 200 and the arc-shaped outer wall 134 form a primary air inlet 210. The two air inlets are located on opposite sides of the gas inlet 220, which promotes strong turbulent flow of air and gas within the injector assembly 100. When the two airflows converge with the central gas flow, they impact and agitate each other, significantly increasing the contact area and mixing speed between the gases, allowing the gas to fully contact with sufficient oxygen for more complete combustion.
[0043] Furthermore, the gas inlet 220 is located on the axis of the ejector tube assembly 100, and a primary air inlet 210 is formed between the damper end plate 200 and the arc-shaped outer wall 134. The primary air inlet 210 on the damper end plate 200 is symmetrical about the gas inlet 220.
[0044] In this embodiment, the two primary air inlets 210 are symmetrical about the central gas inlet 220. The symmetrically distributed air inlets allow air to flow into the ejector assembly 100 from multiple directions evenly. With the gas ejected from the gas inlet 220 as the center, a symmetrical air-enveloping flow field is formed. This symmetrical mixing mode avoids the problem of uneven mixing of gas and air caused by airflow deviation, and makes the concentration distribution of combustible mixture in the ejector assembly 100 uniform.
[0045] In this embodiment, the curvature of the arc-shaped outer wall 134 is less than 180 degrees.
[0046] Specifically, the arc of the outer wall 134 is less than 180 degrees. That is, the arc of the outer wall 134 is a minor arc. The two ends of the outer wall 134 along the circumference abut against the damper end plate 200, that is, the damper end plate 200 covers most of the arc of the ejector tube assembly 100, so that the gas port 220 is opened at the center of the damper end plate 200, and at the same time, it is also conducive to the symmetrical arrangement of the primary air inlets 210 on both sides of the gas port 220.
[0047] In some embodiments, combined with Figure 2 The ejector assembly 100 includes two ejector tubes 130 spaced apart. The air inlet ends 110 of the two ejector tubes 130 are connected into a single structure by a connector 140. The damper end plates 200 of the two ejector tubes 130 are connected into a single structure. Each ejector tube 130 is provided with an arc-shaped outer wall 134. The two arc-shaped outer walls 134 are located on opposite sides of the two ejector tubes 130. The damper end plate 200 is located between the two arc-shaped outer walls 134.
[0048] In this embodiment, the connector 140 is located between the two ejector tubes 130, so that the air inlet ends 110 of the two ejector tubes 130 are connected as one piece. The damper end plates 200 on the two ejector tubes 130 are also integrally formed, forming a more stable frame structure compared to the combination of independent ejector tubes 130. The integral structure of the ejector tube assembly 100 and the damper end plate 200 reduces the number of parts. During installation, it is not necessary to position and fix multiple independent parts separately. It is only necessary to align the entire damper end plate 200 with the end of the integral structure of the ejector tube 130, which greatly simplifies the assembly steps and shortens the production cycle.
[0049] Two arc-shaped outer walls 134 are located on opposite sides of the two ejector tubes 130, with the damper end plate 200 positioned between them. Once the damper end plate 200 is in place, primary air inlets 210 can be formed between the two arc-shaped outer walls 134 and the damper end plate 200, thereby reducing the number of primary air inlets 210 on the damper end plate 200 and improving production efficiency.
[0050] Specifically, one of the two ejector tubes 130 is the inner ring ejector tube 131, and the other is the outer ring ejector tube 132. The diameter of the outer ring ejector tube 132 is larger than that of the inner ring ejector tube 131. The inner ring ejector tube 131 is used to form the central flame zone, with a gas flow rate of 30%-40%, an air-fuel ratio controlled at 1:6.5 (slightly rich in fuel), and a flame temperature of 1700℃. It mainly undertakes the functions of ignition stability and basic heat load. The outer ring ejector tube 132 is used to construct the outer flame zone, with a gas flow rate of 60%-70%, an air-fuel ratio of 1:7.2 (close to the theoretical value), and a flame temperature of 1850℃. It is responsible for the main heat load output and heat diffusion. From the perspective of combustion effect, the outer ring ejector tube 132, with its larger diameter, allows more gas mixture to pass through, thus meeting the larger combustion area and heat demand of the outer ring flame. The combustion zone and heat demand of the inner ring flame are relatively small, so a smaller diameter inner ring ejector 131 can meet its fuel and air supply needs. Considering gas flow characteristics, a larger diameter outer ring ejector 132 can reduce gas velocity and flow resistance, allowing the mixed gas to flow out more smoothly, which is beneficial for forming a stable outer ring flame. Meanwhile, the smaller diameter of the inner ring ejector 131 allows for a higher gas velocity within the pipe, which helps enhance the jetting effect and combustion intensity of the inner ring flame.
[0051] Of course, in other embodiments, the ejector assembly 100 includes three ejector tubes 130 arranged sequentially along a first direction. The air inlet ends 110 of the three ejector tubes 130 are connected into a single structure by a connector 140, and the damper end plates 200 of the three ejector tubes 130 are connected into a single structure. The two ejector tubes 130 near the outer edges are respectively provided with arc-shaped outer walls 134, which are located on opposite sides of the two ejector tubes 130 near the outer edges. The damper end plate 200 is located between the two arc-shaped outer walls 134. That is, the middle ejector tube 130 does not have an arc-shaped outer wall 134, and the air inlet end of the middle ejector tube 130 is directly covered by the damper end plate 200.
[0052] In this embodiment, combined with Figure 1 and Figure 2 The damper end plate 200 is connected to the connector 140.
[0053] In this embodiment, the damper end plate 200 is directly connected to the connector 140 between the two ejector tubes 130. Compared to connecting the damper end plate 200 to the end faces of the two ejector tubes 130 respectively, this connection method in this embodiment is simpler and does not require other connecting structures to be set at the air inlet end 110 of the ejector tube 130, thus reducing the manufacturing difficulty of the ejector tube 130. Furthermore, since the damper end plate 200 is connected to the connector 140, the connection position does not need to be set on the end face of the ejector tube 130, and the primary air inlet 210 will not be blocked, which is beneficial to enlarging the size of the primary air inlet 210 and increasing the air intake volume.
[0054] Specifically, the damper end plate 200 is connected to the connector 140 by screws.
[0055] In some embodiments, combined with Figure 2 The pressurization hole 133 extends through the ejector tube assembly 100 along the axial direction and near the damper end plate 200. The damper end plate 200 covers the pressurization hole 133.
[0056] In this embodiment, the pressure boosting hole 133 extends through the ejector tube 130 along the axial direction and near the damper end plate 200. In actual manufacturing, a groove can be formed on the end face of the ejector tube 130, and then the damper end plate 200 can be placed on the pressure boosting groove to form the pressure boosting hole 133. Forming a groove on the air inlet end 110 of the ejector tube 130 is simpler than directly forming a hole on the side wall of the ejector tube 130. For example, forming a groove on the end face of the ejector tube 130 falls under the category of planar machining. Compared to forming a hole on the side wall, there is no need to consider the axial or radial angle positioning of the hole and the tube body, resulting in lower precision requirements for the machining equipment. Furthermore, opening a hole on the side wall of the ejector tube 130 weakens the circumferential strength of the tube body, especially under the high-pressure impact of gas and air, which can easily lead to stress concentration; while the end face groove only changes the local structure of the air inlet end 110, and the axial and circumferential strength of the tube body is basically unaffected.
[0057] For example, the projection of the pressure boosting hole 133 along the radial direction of the ejector tube assembly 100 is a rectangular structure with a length of 12mm and a width of 4mm. The ejector tube assembly 100 includes an inner ring ejector tube and an outer ring ejector tube. Two ejector tubes are provided on the upper and lower sides of the inner ring ejector tube, and two ejector tubes are provided on the upper and lower sides of the outer ring ejector tube. The specific number and size of these ejector tubes depend on the compatibility of the gas stove.
[0058] In some embodiments, the arc-shaped outer wall 134 is provided with pressure boosting holes 133 at both ends along the circumference, and the two pressure boosting holes 133 are symmetrical about the center of the ejector tube 130.
[0059] In this embodiment, two arc-shaped outer walls 134 are respectively disposed on opposite sides of the two ejector tubes 130. Furthermore, each arc-shaped outer wall 134 has a pressure-boosting hole 133 at both ends along its circumference. This allows the pressure-boosting holes 133 to be located on the upper and lower sides of the ejector tube 130, preventing the ejector tubes 130 from obstructing the pressure-boosting holes 133 when the two pressure-boosting holes 133 are located on the left and right sides. In this embodiment, the upper, lower, left, and right directions apply to... Figure 1 The placement angle of the burner head will change accordingly when the placement angle of the burner head changes.
[0060] Furthermore, the pressurization holes 133 are symmetrically arranged on the upper and lower sides of the ejector tube 130, allowing the supplemented air to enter simultaneously from two directions perpendicular to the axis of the ejector tube 130. This creates a three-dimensional turbulent mixing effect with the air and fuel gas entering from the primary air inlet 210 on the end face. Compared to the left-right side layout, which is prone to obstruction by the ejector tube 130 and resulting in uneven airflow distribution, the symmetrical upper and lower side layout allows the air to more evenly envelop the fuel gas flow, reducing the mixing blind zone, increasing the contact area between the fuel gas and air, shortening the mixing time, significantly improving the uniformity of the combustible mixture, promoting complete combustion, and reducing CO emissions.
[0061] In some embodiments, the primary air inlet 210 has an arc-shaped inner sidewall and an arc-shaped outer sidewall arranged opposite to each other. The arc length of the arc-shaped inner sidewall is greater than the arc length of the arc-shaped outer sidewall. The arc-shaped inner sidewall is adapted to the outer wall of the gas inlet 220, and the arc-shaped outer sidewall is adapted to the arc-shaped outer wall 134. That is, the primary air inlet 210 is approximately crescent-shaped. Compared with the fan-shaped structure of the primary air inlet 210 in the related art, the crescent-shaped structure can make full use of the space of the damper end plate 200 to maximize the size of the primary air inlet 210.
[0062] In other embodiments, combined with Figure 4 and Figure 5 Multiple pressurization holes 133 are sequentially opened along the circumferential direction on the side wall of the ejector assembly 100.
[0063] Specifically, the inner ring ejector tube and the outer ring ejector tube are respectively provided with pressure boosting holes 133. The pressure boosting holes 133 can be circular holes, rectangular holes, triangular holes, etc. Multiple pressure boosting holes 133 can increase the air intake volume and achieve uniform air intake.
[0064] The angle between the pressure boosting hole 133 and the primary air inlet can be changed by altering the extension direction of the pressure boosting hole 133. For example, the pressure boosting hole 133 penetrates vertically through the side wall of the ejector tube 130, in which case the extension direction of the pressure boosting hole 133 is perpendicular to the extension direction of the primary air inlet.
[0065] Furthermore, the two ejector tubes 130 are connected as a single unit near the air intake end 110 via a connector 140. Due to the design of the connector 140, no pressure boosting hole 133 is provided at the connection position between each ejector tube 130 and the connector 140.
[0066] In some embodiments, along the direction from the inlet end 110 to the outlet end 120, both the inner and outer ring ejectors include a straight section, a converging section, a mixing section, and a diffuser section. A damper end plate 200 is disposed at the end of the straight section away from the converging section. The diameter of the converging section gradually decreases to form a throat at the end of the converging section away from the straight section. The cross-sectional area of the gas mixture in the throat decreases, thus accelerating the flow and forming a low-pressure zone to eject outside air from the booster port and the primary inlet into the straight section. The diameter of the mixing section is larger than the diameter of the throat to ensure thorough mixing of the gas and air. The diameter of the diffuser section gradually increases, reducing the velocity of the mixed gas and converting kinetic energy into pressure energy, causing the pressure of the mixed fluid to rise and then enter the burner head at a certain pressure.
[0067] In some embodiments, along the direction from the outside to the inside of the ejector tube 130, the extension direction of the booster hole 133 is inclined toward the side away from the air inlet end 110. This facilitates reducing the air resistance of the air entering from the booster hole 133 and reducing flow loss.
[0068] One embodiment of this application discloses a gas stove, which includes a burner and a burner head. The burner head includes a burner head front end 300, which is detachably disposed on the side of the injector tube assembly 100 away from the air damper end plate 200. The burner head is disposed on the burner head front end 300, and a secondary air inlet is provided on the burner head.
[0069] In this embodiment, the damper end plate 200 is provided with a primary air inlet, the burner has a secondary air inlet, and the ejector assembly 100 has a pressure boosting hole 133 on its side wall near the air inlet end 110. Air can enter the burner head through these three types of holes, which is beneficial for complete combustion of the fuel gas and reduces CO emissions. The pressure boosting hole 133 on the ejector assembly 100 increases the air intake, further promoting combustion, improving combustion efficiency, and reducing CO emissions. Furthermore, the pressure boosting hole 133 is located on the side wall of the ejector assembly 100 near the air inlet end 110. The airflow direction entering through the pressure boosting hole 133 is different from the airflow direction entering through the primary air inlet 210. Therefore, when both streams of air flow into the ejector assembly 100 simultaneously, they collide and mix, thereby increasing the pressure within the ejector assembly 100, promoting complete mixing of air and fuel gas, improving combustion efficiency, and reducing CO emissions. In addition, the increased pressure of the pressurized gas mixture and the increased flame jet speed can resist external airflow interference (such as kitchen ventilation), prevent flameout or backfire, and adapt to high-load combustion requirements.
[0070] Specifically, the front end of the furnace head is detachably connected to the ejector tube assembly 100 via screws.
[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0072] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A stove head, characterized in that, The burner head includes: An ejector assembly (100) has an air inlet (110) and an air outlet (120), and a pressure boosting hole (133) is provided on the side wall of the ejector assembly (100) near the air inlet (110). A damper end plate (200) is provided on the air inlet end (110) of the ejector tube assembly (100), and a primary air inlet (210) and a gas inlet (220) are provided on the damper end plate (200). The primary air inlet (210) and the booster port (133) are configured to allow air to enter, and the gas port (220) is used to connect to a gas nozzle.
2. The burner head according to claim 1, characterized in that, The pressurization hole (133) extends through the ejector tube assembly (100) along its axial direction and near the damper end plate (200) at one end, and the damper end plate (200) covers the pressurization hole (133).
3. The burner head according to claim 1, characterized in that, Multiple pressure-boosting holes (133) are sequentially opened along the circumferential direction on the side wall of the ejector tube assembly (100).
4. The burner head according to claim 1, characterized in that, A portion of the outer wall of the ejector assembly (100) located at the air inlet end (110) extends axially toward the damper end plate (200) to form an arc-shaped outer wall (134). The damper end plate (200) covers the air inlet end (110) of the portion of the ejector assembly (100), and the two ends of the arc-shaped outer wall (134) in the circumferential direction abut against the damper end plate (200) respectively. A primary air inlet (210) is formed between the damper end plate (200) and the arc-shaped outer wall (134).
5. The burner head according to claim 4, characterized in that, The primary air inlet (210) formed between the damper end plate (200) and the arc-shaped outer wall (134) is located on the opposite sides of the gas inlet (220) to the primary air inlet (210) on the damper end plate (200).
6. The burner head according to claim 5, characterized in that, The gas inlet (220) is located on the axis of the ejector tube assembly (100), and the primary air inlet (210) formed between the damper end plate (200) and the arc-shaped outer wall (134) is symmetrical about the gas inlet (220) with respect to the primary air inlet (210) on the damper end plate (200).
7. The burner head according to claim 4, characterized in that, The arc of the arc-shaped outer wall (134) is less than 180 degrees.
8. The burner head according to claim 4, characterized in that, The ejector tube assembly (100) includes two ejector tubes (130) spaced apart. The air inlet ends (110) of the two ejector tubes (130) are connected into a single structure by a connector (140). The damper end plates (200) of the two ejector tubes (130) are connected into a single structure. Each ejector tube (130) is provided with an arc-shaped outer wall (134), and the two arc-shaped outer walls (134) are located on opposite sides of the two ejector tubes (130) away from each other. The damper end plate (200) is located between the two arc-shaped outer walls (134).
9. The burner head according to claim 8, characterized in that, The damper end plate (200) is connected to the connector (140).
10. The burner head according to claim 4, characterized in that, The arc-shaped outer wall (134) is provided with pressure-boosting holes (133) at both ends along the circumference, and the two pressure-boosting holes (133) are symmetrical about the center of the ejector tube (130).
11. A gas stove, characterized in that, The gas stove includes a burner and a burner head as described in any one of claims 1-10. The burner head includes a burner head front end (300), which is detachably disposed on the side of the injector tube assembly (100) away from the damper end plate (200). The burner is disposed on the burner head front end (300) and has a secondary air inlet.