Air door structure and gas stove

Abstract

This utility model relates to the field of stove technology, and more particularly to a damper structure and a gas stove. The damper structure includes a damper, a nozzle, and an adjusting mechanism. The damper has a frustum-shaped cone structure and is located at the inlet of the injector tube, forming an annular gap with the inlet. Multiple spiral grooves are spaced circumferentially on the outer conical surface of the damper, extending spirally along the axial direction of the damper. An airflow channel is formed through the damper along its axial direction. The damper is movably fitted onto the nozzle, which is located within and communicates with the airflow channel. The adjusting mechanism is driven by the damper to drive the damper to move axially along the nozzle and rotate around the nozzle. The adjusting mechanism drives the damper to move axially along the nozzle to adjust the size of the annular gap, thereby adjusting the air intake and achieving an appropriate mixing ratio of gas and air. The spiral grooves form an air acceleration channel, increasing the air velocity and kinetic energy, and improving the combustion performance of the burner.

Description

Technical Field

[0001] This utility model relates to the field of stove technology, and in particular to a damper structure and a gas stove. Background Technology

[0002] The air damper in a gas stove is a key component for regulating the air-to-gas mixture ratio. It is typically located at the inlet of the burner's injector tube and optimizes combustion efficiency by controlling airflow. In related technologies, air dampers are generally rotatable metal plates with air inlets, allowing manual adjustment of the damper opening to ensure an appropriate gas-to-air mixture ratio by controlling the air intake. However, existing plate-shaped air dampers cannot fully open the injector chamber within the injector tube and cannot add kinetic energy to the air, resulting in poor gas-to-air mixing and reduced burner performance. Utility Model Content

[0003] One of the technical problems solved by this utility model is to provide a damper structure that can effectively solve the technical problem in the prior art that the damper cannot open the ejector tube to the maximum state and cannot increase the kinetic energy of the air.

[0004] The second technical problem solved by this utility model is to provide a gas stove that can effectively solve the technical problem in the prior art that the air damper cannot open the injector to the maximum state and cannot increase the kinetic energy of the air.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] The damper structure includes a damper, a nozzle, and an adjusting mechanism. The damper has a frustum-shaped structure and is located at the inlet of the ejector tube, forming an annular gap with the inlet. Multiple spiral grooves are spaced circumferentially on the outer conical surface of the damper, and these grooves extend spirally along the axial direction of the damper. An airflow channel is axially penetrated through the damper. The damper is rotatably fitted onto the nozzle, which is located within and communicates with the airflow channel. The adjusting mechanism is drively connected to the damper to drive the damper to move and rotate axially along the nozzle.

[0007] The damper structure described in this utility model has the following advantages compared with the prior art:

[0008] The adjusting mechanism drives the damper to move axially along the nozzle, moving it closer to or further away from the injector inlet to adjust the size of the annular gap. This regulates the air intake, ensuring an appropriate mixing ratio between the fuel gas and air, thus improving the air-fuel mixing efficiency. Furthermore, the adjusting mechanism drives the damper to rotate axially around the nozzle, creating a spiral groove that accelerates the air, increasing its velocity and kinetic energy, further enhancing the air-fuel mixing efficiency and improving the burner's combustion performance.

[0009] In one embodiment, the adjustment mechanism includes:

[0010] A first driving member, the output end of which is connected to the damper to drive the damper to rotate around the axial direction of the nozzle; the first driving member and the damper are in a limiting fit along the axial direction of the nozzle.

[0011] The second driving member is connected to the first driving member in a transmission manner to drive the first driving member to move axially along the nozzle, and the damper moves axially synchronously with the first driving member.

[0012] In one embodiment, the adjustment mechanism further includes a slide plate, which has a groove along the axial direction of the nozzle; the second drive member is disposed on the slide plate, and the first drive member is slidably disposed within the groove.

[0013] In one embodiment, the damper includes:

[0014] A frustum slider, wherein the outer conical surface of the frustum slider is provided with a plurality of spiral grooves spaced apart along the circumference, and the two ends of the spiral grooves extend to the large diameter end and the small diameter end of the frustum slider, respectively;

[0015] A driven gear disk is disposed at the large-diameter end of the truncated cone slider; the adjustment mechanism also includes a driving gear disk, the output end of the first driving member is connected to the driving gear disk, and the driven gear disk meshes with the driving gear disk for transmission.

[0016] In one embodiment, limiting plates are provided on both sides of the driving gear disk in the thickness direction, and the circumferential outer edge of the driven gear disk is inserted between the two limiting plates to mesh and drive with the driving gear disk.

[0017] In one embodiment, the large-diameter end of the truncated cone slider is further provided with a plug, the plug being located between the large-diameter end of the truncated cone slider and the driven gear disk, the plug being configured to block the inlet of the ejector tube.

[0018] In one embodiment, a clearance groove is provided between the plug and the driven gear disk to avoid the limiting plate.

[0019] In one embodiment, the large-diameter end of the damper has a mounting groove communicating with the airflow channel, and a bearing is installed in the mounting groove; one end of the nozzle passes through the bearing and extends into the airflow channel.

[0020] In one embodiment, the helix angle of the spiral groove is 60° to 80°.

[0021] The second technical problem mentioned above is solved by the following technical solution:

[0022] Gas stove, including the aforementioned damper structure.

[0023] The gas stove described in this utility model has the following advantages compared with the prior art:

[0024] The adjusting mechanism drives the damper to move axially along the nozzle, moving it closer to or further away from the injector inlet to adjust the size of the annular gap. This regulates the air intake, ensuring an appropriate mixing ratio between the fuel gas and air, thus improving the air-fuel mixing efficiency. Furthermore, the adjusting mechanism drives the damper to rotate axially around the nozzle, creating a spiral groove that accelerates the air, increasing its velocity and kinetic energy, further enhancing the air-fuel mixing efficiency and improving the burner's combustion performance. Attached Figure Description

[0025] Figure 1 This is a partial structural schematic diagram of the gas stove provided in this embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0027] Figure 3 This is a schematic diagram of the structure of the damper provided in an embodiment of the present utility model;

[0028] Figure 4 This is a top view of the gas stove provided in this embodiment of the utility model;

[0029] Figure 5 yes Figure 4 A magnified view of a section at point B.

[0030] The component names and labels in the diagram are as follows:

[0031] 10. Ejector tube; 101. Inlet; 20. Base; 30. Knob; 40. Gas tube; 50. Flame cap;

[0032] 1. Damper; 11. Conical slider; 111. Airflow channel; 112. Spiral groove; 113. Mounting groove; 12. Driven gear disc; 13. Plug; 14. Clearance groove; 2. Nozzle; 3. First driving component; 4. Driven gear disc; 41. Limiting plate; 5. Second driving component; 6. Slide plate; 61. Slide groove; 7. Bearing. Detailed Implementation

[0033] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] This embodiment proposes a gas stove, which includes a gas supply system, an ignition system, and a burner. The gas supply system is used to supply gas to the burner, the ignition system ignites the mixture of air and gas through an ignition needle, and the burner produces a flame by burning the mixture.

[0039] like Figure 1 As shown, a gas supply system and a burner are installed on the chassis 20 of the gas stove. The burner includes a burner assembly and a burner cap 50, with the burner cap 50 mounted on the burner assembly. A gas pipe 40 in the gas supply system is used to transport gas. A knob 30 is installed on the gas pipe 40 to control the gas flow rate. A nozzle 2 is installed at the end of the gas pipe 40, directly facing the inlet 101 of the injector tube 10 of the burner assembly. This nozzle directs the gas into the injector chamber within the injector tube 10 in a jet-like manner, creating a negative pressure environment at the inlet 101 of the injector tube 10. This entrains surrounding air into the injector chamber, achieving gas-air mixing, which then burns at the flame holes of the burner cap 50.

[0040] The air damper in existing gas stoves is a key component for regulating the air-gas mixture ratio. These dampers are generally rotatable metal plates with air inlets, allowing manual adjustment of the damper opening to control the airflow and ensure a proper gas-air mixture. However, the existing plate-like damper structure cannot fully open the ejector chamber within the injector tube and cannot add kinetic energy to the air, resulting in poor gas-air mixing and reduced burner performance.

[0041] To solve the above problems, such as Figure 2 and Figure 3As shown, this embodiment also proposes a damper structure, which includes a damper 1, a nozzle 2, and an adjusting mechanism. The damper 1 has a frustum-shaped structure and is located at the inlet 101 of the ejector tube 10, forming an annular gap with the inlet 101. An airflow channel 111 is axially extended through the damper 1, and multiple spiral grooves 112 are spaced circumferentially on the outer conical surface of the damper 1, extending spirally along the axial direction of the damper 1. The damper 1 is movably fitted onto the nozzle 2, which communicates with the airflow channel 111. The damper 1 also moves axially along the nozzle 2 to form an annular gap with the inlet 101 of the ejector tube 10. The adjusting mechanism is drively connected to the damper 1 to drive the damper 1 to move axially along the nozzle 2 and rotate around the nozzle 2. The adjusting mechanism drives the damper 1 to move axially along the nozzle 2, moving it closer to or further away from the inlet 101 of the ejector tube 10. This adjusts the size of the annular gap, thereby regulating the air intake and ensuring an appropriate mixing ratio between the fuel gas and air, thus improving the air-fuel mixing efficiency. Furthermore, the adjusting mechanism drives the damper 1 to rotate axially around the nozzle 2, causing the spiral groove 112 to form an air acceleration channel, increasing the air velocity and kinetic energy, further improving the air-fuel mixing efficiency and enhancing the burner's combustion performance.

[0042] It should be noted that when the burner stops working, the damper 1 continues to rotate under the drive of the regulating mechanism to maintain a negative pressure environment at the inlet 101 of the ejector tube 10. External air continues to enter the internal cavity of the burner through the ejector tube 10 to cool the burner, thereby rapidly cooling the burner and improving its service life.

[0043] like Figure 2 and Figure 3 As shown, the large-diameter end of the damper 1 has a mounting groove 113 that communicates with the airflow channel 111. A bearing 7 is installed in the mounting groove 113, and one end of the nozzle 2 passes through the bearing 7 and extends into the airflow channel 111. The damper 1 is supported and mounted on the nozzle 2 by the bearing 7, which allows the damper 1 to rotate and move smoothly along the axial direction of the nozzle 2, thus improving the stability of the damper 1 during rotation and movement.

[0044] In one embodiment, such as Figure 2 and Figure 3As shown, the adjustment mechanism includes a first driving member 3 and a second driving member 5. The output end of the first driving member 3 is connected to the damper 1 to drive the damper 1 to rotate around the axial direction of the nozzle 2. The first driving member 3 and the damper 1 are in a limiting fit along the axial direction of the nozzle 2. The second driving member 5 is connected to the first driving member 3 to drive the first driving member 3 to move axially along the nozzle 2, and the damper 1 moves axially synchronously with the first driving member 3. The first driving member 3 is a rotary motor, which has high control precision, simple structure, and is easy to install and use. The axial movement of the first driving member 3 along the nozzle 2 refers to the movement of the first driving member 3 in a direction parallel to the axis of the nozzle 2. The second driving member 5 is a linear motor, which has a simple structure, higher positioning precision, and is easy to install and use. The output end of the linear motor is connected to the first driving member 3 to drive the first driving member 3 to move axially along the nozzle 2, thereby driving the damper 1 to move synchronously along the axial direction of the nozzle 2 through the drive gear disk 4, so as to adjust the size of the annular gap between the damper 1 and the inlet 101 of the ejector tube 10.

[0045] like Figure 2 and Figure 5 As shown, the adjustment mechanism also includes a slide plate 6, which has a groove 61 along the axial direction of the nozzle 2. The second drive member 5 is disposed on the slide plate 6, and the first drive member 3 is slidably disposed within the groove 61. Through the sliding engagement between the first drive member 3 and the groove 61, the first drive member 3 is guided and limited to move along the axial direction of the nozzle 2, thereby improving the adjustment accuracy of the annular gap.

[0046] like Figure 2 and Figure 3 As shown, the damper 1 includes a frustum slider 11 and a driven gear disk 12. The outer conical surface of the frustum slider 11 has multiple helical grooves 112 spaced circumferentially, with each helical groove extending to the large-diameter end and small-diameter end of the frustum slider 11, respectively. The driven gear disk 12 is located at the large-diameter end of the frustum slider 11. The adjustment mechanism also includes a driving gear disk 4. The output end of the first driving member 3 is connected to the driving gear disk 4, and the driven gear disk 12 meshes with the driving gear disk 4 for transmission. Through the meshing transmission between the driven gear disk 12 and the driving gear disk 4, the first driving member 3 drives the frustum slider 11 to rotate via gear meshing, improving the stability and reliability of the damper 1's rotation.

[0047] It should be noted that the helix angle of the spiral groove 112 in this embodiment is 60° to 80°. The helix angle can be 60°, 65°, 70°, 75°, or 80°, etc., so that the spiral groove 112 has a better acceleration effect on the air, increases the air kinetic energy at the inlet 101 of the ejector tube 10, and improves the mixing effect of the combustion gas and air. If the helix angle is too small, although the flow resistance is small, the effect of accelerating the air flow is not obvious; if the helix angle is too large, the flow resistance is too large, which not only easily causes air turbulence at the inlet 101 of the ejector tube 10, affecting the intake of primary air of the ejector tube 10, but also increases the energy consumption of the first driving member 3.

[0048] like Figure 4 and Figure 5 As shown, limiting plates 41 are provided on both sides of the driving gear disk 4 in the thickness direction. The circumferential outer edge of the driven gear disk 12 is inserted between the two limiting plates 41 to mesh and drive with the driving gear disk 4. The two limiting plates 41 limit the driven gear disk 12 along the axial direction of the nozzle 2, so that the driving gear disk 4 and the driven gear disk 12 can be stably meshed. At the same time, the driving gear disk 4 drives the driven gear disk 12 to move synchronously along the axial direction of the nozzle 2, so that the truncated cone slider 11 moves closer to or further away from the inlet 101 of the ejector tube 10 to adjust the size of the annular gap, thereby adjusting the air intake and improving the mixing efficiency of air and fuel.

[0049] like Figure 3 and Figure 5 As shown, a plug 13 is also provided at the large-diameter end of the truncated cone slider 11. The plug 13 is located between the large-diameter end of the truncated cone slider 11 and the driven gear disk 12. The plug 13 is configured to block the inlet 101 of the ejector tube 10. The second drive member 5 drives the damper 1 to move toward the inlet 101 of the ejector tube 10 through the first drive member 3 until the plug 13 is embedded and blocks the inlet 101 of the ejector tube 10, preventing external air from entering the ejector tube 10, thereby preventing backfire in the burner and improving the safety of the burner.

[0050] like Figure 5 As shown, a clearance groove 14 of the clearance limiting plate 41 is provided between the plug 13 and the driven gear disk 12. By providing the clearance groove 14, interference between the cone slider 11 and the limiting plate 41 is avoided when the driving gear disk 4 and the driven gear disk 12 are meshed, thus ensuring the stability of the meshing between the driving gear disk 4 and the driven gear disk 12.

[0051] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A damper structure, characterized in that, The device includes a damper (1), a nozzle (2), and an adjusting mechanism. The damper (1) has a frustum-shaped structure and is located at the inlet (101) of the ejector tube (10) to form an annular gap with the inlet (101). The outer conical surface of the damper (1) is provided with a plurality of spiral grooves (112) spaced apart circumferentially, and the spiral grooves (112) extend spirally along the axial direction of the damper (1). The damper (1) is provided with an airflow channel (111) through it along the axial direction. The damper (1) is movably fitted onto the nozzle (2), and the nozzle (2) is located in the airflow channel (111) and communicates with the airflow channel (111). The adjusting mechanism is connected to the damper (1) to drive the damper (1) to move axially along the nozzle (2) and rotate around the axial direction of the nozzle (2).

2. The damper structure according to claim 1, characterized in that, The adjustment mechanism includes: The first driving member (3) has its output end connected to the damper (1) to drive the damper (1) to rotate around the axial direction of the nozzle (2); the first driving member (3) and the damper (1) are in a limiting fit along the axial direction of the nozzle (2); The second driving member (5) is connected to the first driving member (3) in a transmission manner to drive the first driving member (3) to move axially along the nozzle (2), and the damper (1) moves axially synchronously with the first driving member (3).

3. The damper structure according to claim 2, characterized in that, The adjustment mechanism further includes a slide plate (6), which has a groove (61) along the axial direction of the nozzle (2); the second drive member (5) is disposed on the slide plate (6), and the first drive member (3) is slidably disposed in the groove (61).

4. The damper structure according to claim 2, characterized in that, The damper (1) includes: A frustum slider (11) has a plurality of spiral grooves (112) spaced apart circumferentially on its outer conical surface. The two ends of the spiral grooves (112) extend to the large diameter end and the small diameter end of the frustum slider (11), respectively. A driven gear disk (12) is disposed at the large diameter end of the truncated cone slider (11); the adjustment mechanism also includes a driving gear disk (4), the output end of the first driving member (3) is connected to the driving gear disk (4), and the driven gear disk (12) meshes with the driving gear disk (4) for transmission.

5. The damper structure according to claim 4, characterized in that, Limiting plates (41) are provided on both sides of the thickness direction of the driving gear disk (4), and the circumferential outer edge of the driven gear disk (12) is inserted between the two limiting plates (41) to mesh and drive with the driving gear disk (4).

6. The damper structure according to claim 5, characterized in that, The large-diameter end of the truncated cone slider (11) is also provided with a plug (13), which is located between the large-diameter end of the truncated cone slider (11) and the driven gear disk (12). The plug (13) is configured to block the inlet (101) of the ejector tube (10).

7. The damper structure according to claim 6, characterized in that, An avoidance groove (14) is provided between the plug (13) and the driven gear disk (12) to avoid the limiting plate (41).

8. The damper structure according to any one of claims 1 to 7, characterized in that, The damper (1) has a mounting groove (113) at its large diameter end that communicates with the airflow channel (111), and a bearing (7) is installed in the mounting groove (113); one end of the nozzle (2) passes through the bearing (7) and extends into the airflow channel (111).

9. The damper structure according to any one of claims 1 to 7, characterized in that, The helix angle of the spiral groove (112) is 60° to 80°.

10. A gas stove, characterized in that, The damper structure includes any one of claims 1 to 9.

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