Annular air inlet burner and gas stove

Abstract

The utility model provides an annular air inlet burner and a gas stove, the annular air inlet burner comprises an ejector and a valve body, the air inlet end of the ejector is provided with a limiting plate, the limiting plate is provided with an air inlet and a positioning port, and the positioning port is coaxially matched with a nozzle on the valve body and is used for positioning the nozzle on the valve body. The limiting plate is arranged at the air inlet end of the ejector, so that the positioning effect between the ejector and the nozzle is improved, particularly, the axial positioning effect between the ejector and the nozzle is improved, the nozzle is prevented from stretching into the ejector by too long or too short length, meanwhile, the coaxiality between the nozzle and the ejector can be guaranteed, and therefore the service life of the ejector is prolonged. And the ejection effect of the ejector on primary air can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliances technology, specifically relating to a burner with an annular air intake, and a gas stove equipped with the burner with the annular air intake. Background Technology

[0002] Gas stoves are common kitchen appliances in people's daily lives. Gas stoves generate flames through burners. The burners inject gas into the injector tube through gas nozzles. The gas mixes thoroughly with primary air. Then, the mixed gas is supplied to the burner cap, where it mixes with secondary air to produce flames.

[0003] The ejector is a crucial component of a gas stove, its main function being to thoroughly mix gas and air in a specific ratio before delivering it to the burner for ignition. To improve the ejection effect of the primary air and the uniformity of the primary air-gas mixture, the air damper adjustment structure has gradually adopted a ring-shaped air intake design. Specifically, the air damper adjustment plate is spaced apart from the air intake end of the ejector. Primary air is injected from the periphery of the gap between the air damper adjustment plate and the air intake end of the ejector into the inlet of the constriction section of the ejector tube. The operator changes the amount of primary air ejected by adjusting the distance between the air damper adjustment plate and the air intake end of the ejector.

[0004] For example, Chinese utility model patent application number CN202222266249.X discloses a burner and a gas stove including the burner. The burner includes an injector tube and a direct-insertion valve. The nozzle of the direct-insertion valve is inserted into the injector tube. A damper plate is sleeved on the nozzle. A positioning post is provided at one end of the injector tube near the direct-insertion valve. The positioning post has a first sidewall opposite to the outer peripheral wall of the damper plate. The curvature of at least a portion of the curved surface of the first sidewall is consistent with the curvature of the outer peripheral wall of the damper plate.

[0005] However, existing injector tubes and direct-insertion valves are usually fixed inside the gas stove casing with screws. During installation, the positioning effect between the nozzle of the direct-insertion valve and the injector tube is poor. Due to installation errors and / or deformation of the gas stove casing, the nozzle of the direct-insertion valve may extend too far or too short into the injector tube, resulting in a decrease in injection performance, a reduction in primary air volume, and an impact on the flue gas and energy efficiency of the combustion system.

[0006] In view of this, this utility model is hereby proposed. Utility Model Content

[0007] This invention provides a burner with annular air intake. By setting a limiting plate at the air intake end of the ejector, the positioning effect between the ejector and the nozzle is improved, which solves the problem of poor ejection performance caused by the nozzle extending too far or too short into the ejector in existing annular air intake burners.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0009] A burner with annular air intake includes an ejector and a valve body. The air intake end of the ejector is provided with a limiting plate. The limiting plate is provided with an air inlet and a positioning port. The positioning port is coaxially engaged with a nozzle on the valve body for positioning the nozzle on the valve body.

[0010] Furthermore, the nozzle tip is inserted into the positioning port, and an axial positioning structure is provided between the nozzle tip and the positioning port;

[0011] Preferably, the positioning port is provided with an abutment part on the side facing the ejector, for abutting with the end face of the nozzle; or, the nozzle is provided with an abutment surface, which abuts with the side of the limiting plate away from the ejector.

[0012] Preferably, the end face of the nozzle is flush with the inlet of the converging section of the ejector;

[0013] Preferably, the nozzle end is provided with a connector whose outer diameter matches the inner diameter of the positioning port, and the contact surface is provided around the end of the connector away from the ejector.

[0014] Furthermore, the limiting plate is fixedly connected to the air inlet end of the ejector, or the limiting plate is sandwiched between the abutment surface and the end face of the air inlet end of the ejector, and a limiting part is provided on the air inlet end of the ejector around the outer edge of the limiting plate;

[0015] Preferably, the limiting plate extends radially along the ejector.

[0016] Furthermore, the ejector includes a first ejector and a second ejector arranged side by side, with the inlets of the contraction sections of the first ejector and the second ejector flush; a limiting plate covers the inlets of the contraction sections of the first ejector and the second ejector, and abuts against the portion between the inlets of the contraction sections of the first ejector and the second ejector.

[0017] Furthermore, a boss is provided between the inlet of the contraction section of the first ejector and the second ejector, the boss protruding towards the side closer to the valve body, and the limiting plate abutting against the boss;

[0018] The outer edge of the limiting plate is aligned with the inlet of the contraction section of the first ejector and the second ejector; the limiting part is annular and extends around the inlet of the contraction section of the first ejector and the second ejector and the edge of the boss.

[0019] Preferably, the limiting part is provided with a protruding limiting groove, and the outer edge of the limiting plate is provided with a limiting protrusion that cooperates with the limiting groove.

[0020] Furthermore, the nozzle's mounting position on the valve body is adjustable, allowing the nozzle to extend or shorten relative to the valve body.

[0021] Preferably, the valve body's output pipe is coaxial with the ejector, and the nozzle extends at least partially into the output pipe and is threadedly connected to the output pipe.

[0022] Furthermore, the air inlet is positioned around the positioning port;

[0023] Preferably, the air inlet is configured as an arc extending around the axis of the positioning port;

[0024] Preferably, the air inlet is provided with a plurality of air inlets arranged at intervals around the axis of the positioning port, and the portion of the limiting plate located between two adjacent air inlets constitutes a connecting part; or, the air inlet is provided with a single air inlet, which is C-shaped, and the portion of the limiting plate located between the two ends of the air inlet constitutes a connecting part.

[0025] Furthermore, the two ends of the C-shaped air inlet are parallel to each other, and the connecting part extends radially along the ejector;

[0026] Preferably, the limiting plate is provided with two C-shaped air inlets corresponding to the inlets of the contraction sections of the first ejector and the second ejector, respectively, and the two C-shaped air inlets are arranged opposite to each other;

[0027] Preferably, the arc angle of the outer periphery of the C-shaped air inlet is greater than 270° and less than 360°.

[0028] Furthermore, the damper adjustment plate and the limiting plate fitted on the nozzle are arranged opposite each other, and a primary air inlet is formed between the damper adjustment plate and the limiting plate. The primary air inlet is connected to the air inlet.

[0029] Preferably, the damper adjustment plate is coaxial with the ejector, and the damper adjustment plate is threadedly fitted with the nozzle;

[0030] Preferably, the outer edge of the damper adjustment plate is provided with anti-slip teeth.

[0031] This utility model also provides a gas stove, including the above-mentioned annular air intake burner;

[0032] Preferably, the valve body and the ejector are respectively connected to the outer casing of the gas stove by screws.

[0033] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0034] 1. This utility model improves the positioning effect between the ejector and the nozzle by setting a limiting plate at the air inlet end of the ejector. In particular, it improves the axial positioning effect between the ejector and the nozzle, avoiding the nozzle from extending too far or too short into the ejector. At the same time, it can also ensure the coaxiality between the nozzle and the ejector, thereby ensuring the ejector's ejection effect on primary air.

[0035] 2. This utility model, by setting a limiting plate between the contact surface of the nozzle and the end face of the air inlet of the ejector, eliminates the need for screws or other connecting parts between the limiting plate and the ejector, which is beneficial to improving the installation efficiency of the annular air inlet burner. At the same time, the limiting plate can block the nozzle, preventing the nozzle from extending too far into the ejector. Furthermore, if the nozzle extends too short into the ejector, the limiting plate will loosen, which is beneficial for the operator to promptly detect and adjust the relative position of the ejector and the nozzle.

[0036] 3. By setting the nozzle to be able to extend or shorten relative to the valve body, this utility model can improve the matching accuracy between the nozzle and the ejector when there is a deviation in the length of the nozzle extending into the ejector, thus ensuring the ejection effect of the ejector.

[0037] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0038] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0039] Figure 1 This is an assembly diagram of the burner in an embodiment of this utility model;

[0040] Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged view of point A in the middle;

[0041] Figure 3 This is a schematic cross-sectional view of the burner along the horizontal direction in an embodiment of this utility model;

[0042] Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged view of point B in the middle;

[0043] Figure 5 This is a schematic diagram of the cooperation structure between the limiting plate and the ejector in an embodiment of this utility model;

[0044] Figure 6 This is a schematic diagram of the air inlet end of the ejector in an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the limiting plate in an embodiment of the present utility model;

[0046] Figure 8This is a schematic diagram of the nozzle structure in an embodiment of the present invention.

[0047] Key components in the diagram: 1. Ejector; 11. Contraction section; 111. Inlet of contraction section; 12. Mixing section; 13. Diffusion section; 14. Limiting part; 141. Limiting groove; 15. Boss; 2. Furnace head; 3. Limiting plate; 31. Air inlet; 32. Positioning port; 33. Connecting part; 34. Limiting protrusion; 4. Valve body; 41. Nozzle; 411. Main body; 412. Connector; 413. Threaded head; 42. Output pipe; 43. Abutment surface; 5. Primary air inlet; 6. Damper adjustment plate; 61. Arc-shaped guide surface.

[0048] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0050] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] Example 1

[0053] like Figures 1 to 8As shown in the embodiment of this utility model, an annular air intake burner is introduced. The annular air intake burner includes an ejector 1 and a valve body 4. The ejector 1 is installed on the burner head 2 of the annular air intake burner. The air outlet end of the ejector 1 is connected to the mixing chamber of the burner head 2. The valve body 4 is arranged opposite to the air inlet end of the ejector 1. The nozzle 41 on the valve body 4 is inserted into the air inlet end of the ejector 1 for injecting gas into the air inlet end of the ejector 1 when the valve body 4 is opened. At the same time, primary air is ejected into the ejector 1.

[0054] The damper adjustment plate 6 is spaced apart from the air inlet end of the ejector 1. Primary air is drawn into the inlet 111 of the constriction section of the ejector 1 from the periphery of the gap between the damper adjustment plate 6 and the air inlet end of the ejector 1. The operator changes the amount of primary air drawn by adjusting the distance between the damper adjustment plate 6 and the air inlet end of the ejector 1.

[0055] That is, the gap between the damper regulating plate 6 and the air inlet end of the ejector 1 constitutes the primary air inlet 5.

[0056] In some specific embodiments, the ejector 1 includes a contraction section 11 and a mixing section 12 arranged sequentially from the air inlet end to the air outlet end. The inner diameter of the contraction section 11 gradually decreases along the direction close to the air outlet end. The mixing section 12 extends from the outlet of the contraction section 11, and the inner diameter of the mixing section 12 is the same as the inner diameter of the outlet of the contraction section 11.

[0057] The high-speed, high-energy flow of gas output from the nozzle enters the mixing section 12 through the contraction section 11. The surrounding air is drawn into the mixing section 12 by the jet and mixes with the gas.

[0058] In some possible embodiments, the outlet end of the mixing section 12 is further provided with a diffuser section 13, the inlet inner diameter of the diffuser section 13 is the same as the outlet inner diameter of the mixing section 12, and the inner diameter of the diffuser section 13 gradually increases along the direction close to the outlet end of the ejector body 411 in order to reduce the flow velocity and increase the static pressure.

[0059] like Figures 1 to 5 As shown, in this embodiment, the air inlet end of the ejector 1 is provided with a limiting plate 3. The limiting plate 3 is provided with a positioning port 32 coaxial with the ejector 1 and an air inlet 31 extending around the positioning port 32. The positioning port 32 is used to position the nozzle 41 on the valve body 4. Specifically, the limiting plate 3 can cover the inlet 111 of the converging section of the ejector 1. The inlet 111 of the converging section of the ejector 1 is connected to the outside through the air inlet 31 and the positioning port 32. The nozzle 41 of the valve body 4 is inserted into the positioning port 32. When the nozzle 41 injects gas into the ejector 1, the ejector 1 draws primary air into the ejector 1 through the primary air inlet 5 and the air inlet 31.

[0060] In this embodiment, by setting a limiting plate 3 at the air inlet end of the ejector 1, the positioning effect between the ejector 1 and the nozzle 41 is improved, the influence of the installation error between the ejector 1 and the valve body 4 is eliminated, and the length of the nozzle 41 extending into the ejector 1 during installation is avoided to be too long or too short. Moreover, during the transportation or long-term use of the gas stove, the deformation of the gas stove shell can be prevented from causing the length of the nozzle 41 extending into the ejector 1 to be too long or too short. At the same time, the coaxiality between the nozzle 41 and the ejector 1 can be guaranteed, thereby ensuring the ejection effect of the ejector 1 on primary air.

[0061] In this embodiment, the end of the nozzle 41 is inserted into the positioning port 32 along the direction close to the ejector 1, and an axial positioning structure is provided between the nozzle 41 and the positioning port 32.

[0062] In some possible embodiments, the positioning port 32 is provided with an abutment portion on the side facing the ejector 1 for abutting against the end face of the nozzle 41. Specifically, the abutment portion can be a limiting rib or a molded shape provided on the side of the limiting plate facing the ejector. The limiting rib or molded shape is arranged around the positioning port and is used to abut against the end face of the nozzle 41 after the nozzle is inserted into the positioning port to a preset position, thereby axially positioning the nozzle.

[0063] In some other possible embodiments, the nozzle 41 is provided with an abutment surface 43, which abuts against the side of the limiting plate 3 away from the ejector 1.

[0064] like Figure 8 As shown, in some specific embodiments, the end of the nozzle 41 is provided with a connector 412 whose outer diameter is adapted to the inner diameter of the positioning port 32, and the outer periphery of the connector 412 is provided with an abutment surface 43, which is used to abut against the side of the limiting plate 3 away from the ejector 1.

[0065] Preferably, in this embodiment, the end face of the nozzle 41 is flush with the inlet 111 of the constriction section of the ejector 1.

[0066] Specifically, experimental verification showed that the ejection effect of primary air is best when the end face of nozzle 41 is flush with the inlet 111 of the constriction section of ejector 1. Therefore, the position where the end face of nozzle 41 is flush with the inlet 111 of the constriction section of ejector 1 is taken as the set position for the installation of nozzle 41 and ejector 1.

[0067] Preferably, the nozzle 41 has a connector 412 at its end with an outer diameter that matches the inner diameter of the positioning port 32, and an abutment surface 43 is provided around the end of the connector 412 away from the ejector 1. The connector 412 is inserted into the positioning port 32, and the end face of the connector 412 is flush with the inlet 111 of the constriction section of the ejector 1.

[0068] In some preferred embodiments, the nozzle 41 includes a body 411 and a connector 412. The connector 412 is coaxially disposed at one end of the body 411 near the ejector 1. The outer diameter of the connector 412 is equal to the inner diameter of the positioning port 32. The outer diameter of the body 411 is larger than the outer diameter of the connector 412. The end face of the body 411 near the ejector 1 forms the abutment surface 43 of the nozzle 41. The abutment surface 43 is disposed around the connector 412. When the relative position between the nozzle 41 and the ejector 1 is a set position, the abutment surface 43 abuts against the limiting plate 3, clamping the limiting plate between the nozzle 41 and the air inlet end of the ejector 1.

[0069] Preferably, in this embodiment, the outer diameter of the connector 412 near the ejector 1 gradually decreases along the direction near the ejector 1, which makes it easy to insert the connector 412 into the positioning port 32 during installation.

[0070] In this embodiment, the limiting plate 3 extends radially along the ejector 1.

[0071] In some possible embodiments, the limiting plate 3 is fixedly connected to the air inlet end of the ejector 1. Specifically, it can be detachably installed at the air inlet end of the ejector 1 by means of screws, bolts or other connecting parts. Alternatively, the limiting plate 3 can be welded or glued to the air inlet end of the ejector 1. Or the limiting plate 3 and the ejector 1 can be set as an integral part.

[0072] In some other possible embodiments, the limiting plate 3 is sandwiched between the contact surface 43 of the nozzle 41 and the end face of the air inlet of the ejector 1, and a limiting portion 14 is provided on the air inlet of the ejector 1 around the outer edge of the limiting plate 3. This prevents the nozzle 41 from extending too far into the ejector 1. Simultaneously, if the nozzle 41 extends too shortly into the ejector 1, the limiting plate 3 will loosen. Therefore, the operator can check the condition of the limiting plate 3 to determine whether the relative position between the nozzle 41 and the ejector 1 is the set position and make adjustments accordingly.

[0073] In particular, after the gas stove is transported over a long distance and installed in the user's home, and after the gas stove has been used for a long time, the operator can determine whether the relative position between the nozzle 41 and the ejector 1 is the set position by judging whether the limit plate 3 is loose. When the limit plate 3 becomes loose or even falls off, the operator can adjust the installation position of the ejector 1 and / or the valve body 4 in the outer shell of the gas stove to correct the relative position between the nozzle 41 and the ejector 1, thereby ensuring the ejector 1's ejection effect on primary air and ensuring the working stability of the annular air intake burner.

[0074] In this embodiment, the end face of the air inlet of the ejector 1 can be flush with the inlet 111 of the contraction section, or it can protrude outward relative to the inlet 111 of the contraction section.

[0075] The phrase "the end face of the air inlet of ejector 1 protrudes outward relative to the inlet 111 of the contraction section" specifically means that the air inlet of ejector 1 is provided with a boss 15 that protrudes and extends around the inlet 111 of the contraction section. The boss 15 protrudes along the axial direction of ejector 1, and the end face of the boss 15 constitutes the end face of the air inlet of ejector 1.

[0076] The boss 15 can be annular, arc-shaped, or irregular in shape, as long as the side of the boss 15 facing the axis of the ejector 1 is coaxial with the inlet 111 of the contraction section and has the same inner diameter.

[0077] In this embodiment, the limiting part 14 is annular, and the inner circumference of the limiting part 14 fits against the outer edge of the limiting plate 3. Thus, a mounting groove is formed at the air inlet end of the ejector 1, the limiting part 14 constitutes the groove wall of the mounting groove, and the end face of the air inlet end of the ejector 1 constitutes the bottom of the mounting groove.

[0078] In this embodiment, the limiting part 14 is provided with an outwardly protruding limiting groove 141. Specifically, the limiting groove 141 protrudes outward from the outer periphery of the area surrounding the limiting part 14, and the outer edge of the limiting part 14 is provided with a limiting protrusion 34 that cooperates with the limiting groove 141. By providing the mutually cooperating limiting groove 141 and limiting protrusion 34, the positioning effect of the limiting plate 3 can be improved.

[0079] In this embodiment, the limiting part 14 is used to limit the limiting plate 3 to ensure the coaxiality between the positioning port 32 and the ejector 1.

[0080] In some possible embodiments, the limiting plate 3 is configured as a circular structure coaxial with the ejector 1, the outer diameter of the limiting plate 3 is larger than the inner diameter of the inlet 111 of the contraction section, and the limiting part 14 protrudes along the axial direction of the ejector 1 around the outer edge of the limiting plate 3.

[0081] In this embodiment, multiple ejectors 1 are provided, and each ejector 1 has a limiting plate 3 at its air inlet end for limiting the corresponding nozzle 41.

[0082] In some other possible embodiments, the ejector 1 includes a first ejector and a second ejector arranged side by side, with the inlets 111 of the contraction sections of the first ejector and the second ejector flush; a limiting plate 3 covers the inlets 111 of the contraction sections of the first ejector and the second ejector, with the middle portion of the limiting plate 3 abutting against the portion between the inlets 111 of the contraction sections of the first ejector and the second ejector.

[0083] Specifically, the portion between the inlet 111 of the first ejector and the converging section of the second ejector is used to support the limiting plate 3, while the other portions of the air inlet end of the ejector 1 do not support the limiting plate 3. Therefore, the limiting plate 3 remains stable only when both nozzles 41 and their corresponding ejectors 1 are in the set positions; if a deviation occurs in the relative position between one nozzle 41 and its corresponding ejector 1, the limiting plate 3 will become loose.

[0084] Preferably, a boss 15 is provided between the inlets 111 of the contraction sections of the first and second ejectors. The boss 15 protrudes towards the side closer to the valve body 4, and the limiting plate 3 abuts against the boss 15. The outer edge of the limiting plate 3 is aligned with the inlets 111 of the contraction sections of the first and second ejectors; the limiting part 14 is annular and extends around the inlets 111 of the contraction sections of the first and second ejectors and the edge of the boss 15. The boss 15 can increase the range of motion of the limiting plate 3.

[0085] Specifically, the nozzle 41 that cooperates with the first ejector located on the left is called the first nozzle 41, and the nozzle 41 that cooperates with the second ejector located on the right is called the second nozzle 41. When the first nozzle 41 extends too shortly into the first ejector, the limiting plate 3 can rotate around the boss 15. The left side of the limiting plate 3 can rotate outward from the first ejector, and the right side of the limiting plate 3 can rotate inward from the second ejector. When the first nozzle 41 extends too long into the first ejector, the left side of the limiting plate 3 rotates inward from the first ejector, and the right side of the limiting plate 3 rotates outward from the second ejector. Thus, the operator can determine which nozzle 41 is not in the set position relative to the ejector 1 based on the tilt direction of the limiting plate 3, so as to make adjustments.

[0086] Preferably, in this embodiment, the limiting part 14 is provided with an outwardly protruding limiting groove 141, and the outer edge of the limiting plate 3 is provided with a limiting protrusion 34 that cooperates with the limiting groove 141.

[0087] like Figures 1 to 4 As shown, in this embodiment, the air inlets of the first ejector and the second ejector are connected as one unit, and the inlets 111 of the contraction sections of the first ejector and the second ejector are arranged side by side in the horizontal direction, and the inlets 111 of the contraction sections of the first ejector and the second ejector are spaced apart from each other.

[0088] The boss 15 is disposed between the inlet 111 of the contraction section of the first ejector and the second ejector. The left and right sides of the boss 15 are arc surfaces extending around the inlet 111 of the contraction section of the first ejector and the second ejector, respectively. That is, the inner diameter of the arc surfaces on the left and right sides is the same as the inner diameter of the inlet 111 of the contraction section of the first ejector and the second ejector.

[0089] The outer edges of the portion of the limiting plate 3 located on the left and right sides of the boss 15 are aligned with the inlet 111 of the contraction section of the first ejector and the second ejector. The limiting part 14 is arranged around the inlet 111 of the contraction section of the first ejector and the second ejector and the upper and lower edges of the boss 15.

[0090] The upper and lower ends of the boss 15 are provided with outwardly protruding limiting protrusions 34, and the limiting part 14 is provided with a limiting groove 141 corresponding to the limiting protrusions 34.

[0091] In some preferred embodiments, the mounting position of the nozzle 41 on the valve body 4 is adjustable, and the nozzle 41 can be extended or shortened relative to the valve body 4. Therefore, when there is a deviation in the length of the nozzle 41 extending into the ejector 1, the fitting accuracy between the nozzle 41 and the ejector 1 can be improved by adjusting the extension length of the nozzle 41, thus ensuring the ejection effect of the ejector 1.

[0092] In some specific embodiments, the output pipe 42 of the valve body 4 is coaxial with the ejector 1, and the nozzle 41 extends at least partially into the output pipe 42 and is threadedly connected to the output pipe 42. The operator can adjust the length of the nozzle 41 extending into the ejector 1 by rotating the nozzle 41.

[0093] Specifically, a threaded head 413 is coaxially provided at the end of the nozzle 41 away from the ejector 1. The outer wall of the threaded head 413 is provided with an external thread, and the inner wall of the output pipe 42 of the valve body 4 is provided with an internal thread that matches the external thread on the threaded head 413.

[0094] In this embodiment, a sealing ring is provided on the outer periphery of the threaded head 413 to seal the gap between the threaded head 413 and the output pipe 42 in the radial direction.

[0095] In this embodiment, during the installation of the burner, or when there is a deviation in the relative position of the nozzle 41 and the ejector 1, the operator can make a coarse adjustment to the relative position of the nozzle 41 and the ejector 1 by adjusting the installation position of the valve body 4 and the ejector 1, and then make a fine adjustment to the relative position of the nozzle 41 and the ejector 1 by adjusting the extension length of the nozzle 41 relative to the valve body 4, so that the end of the nozzle 41 is precisely aligned with the inlet 111 of the converging section of the ejector 1.

[0096] In this embodiment, the air inlet 31 is configured as an arc extending around the axis of the ejector 1.

[0097] In this embodiment, the air inlet 31 and the positioning port 32 divide the limiting plate 3 into a first limiting ring, a second limiting ring coaxially disposed on the inner circumference of the first limiting ring, and a connecting part 33 connecting the first limiting ring and the second limiting ring. The second limiting ring is used to position the nozzle 41.

[0098] In some possible embodiments, the air inlet 31 is provided with a plurality of air inlets spaced apart around the axis of the ejector 1, and the portion of the limiting plate 3 located between two adjacent air inlets 31 constitutes a connecting portion 33, and the number of connecting portions 33 is the same as the number of air inlets 31.

[0099] In some other possible embodiments, the air inlet 31 is provided as a single C-shaped portion, and the portion of the limiting plate 3 located between the two ends of the air inlet 31 constitutes the connecting portion 33. In this embodiment, there is one connecting portion 33.

[0100] In this embodiment, by setting the air inlet 31 to a C-shape, the air intake area of ​​the air inlet 31 can be increased, ensuring the entrainment effect of primary air.

[0101] Preferably, in this embodiment, the outer diameter of the C-shaped air inlet 31 is close to the inner diameter of the inlet 111 of the constriction section of the ejector 1, and is smaller than the inner diameter of the inlet 111 of the constriction section of the ejector 1; the inner diameter of the C-shaped air inlet 31 is close to the inner diameter of the positioning port 32, and is larger than the inner diameter of the positioning port 32.

[0102] Preferably, in this embodiment, the two ends of the C-shaped air inlet 31 are parallel to each other, and the connecting part 33 extends radially along the ejector 1.

[0103] The limiting plate 3 is provided with two C-shaped air inlets 31 that correspond to the inlets 111 of the contraction sections of the first ejector and the second ejector, respectively, and the two C-shaped air inlets 31 are arranged opposite to each other.

[0104] Specifically, the two C-shaped air inlets 31 are arranged opposite to each other, and the two C-shaped air inlets 31 form two connecting parts 33 on the limiting plate 3. By setting the two C-shaped air inlets 31 opposite to each other, the two connecting parts 33 are connected to the middle of the limiting plate 3, which can ensure the support strength of the nozzle 41.

[0105] Preferably, the two connecting portions 33 formed by the two C-shaped air inlets 31 are collinear, and both connecting portions 33 are connected to the portion of the limiting plate 3 located between the inlet 111 of the contraction section of the first ejector and the second ejector.

[0106] Preferably, the extending direction of the connecting portion 33 is perpendicular to the extending direction of the boss 15.

[0107] Preferably, the arc angle of the outer periphery of the C-shaped air inlet 31 is greater than 270° and less than 360°.

[0108] In this embodiment, the damper adjustment plate 6 is sleeved on the nozzle 41, and the damper adjustment plate 6 is arranged opposite to the limiting plate 3. A primary air inlet 5 is formed between the damper adjustment plate 6 and the limiting plate 3, and the primary air inlet 5 is connected to the air inlet 31.

[0109] In some specific embodiments, the outer diameter of the damper regulating plate is larger than the outer diameter of the air inlet 31.

[0110] Preferably, the damper adjusting plate 6 is provided with an arc-shaped guide surface 61 on the side facing the ejector 1. The arc-shaped guide surface 61 is provided near the outer edge of the damper adjusting plate 6 and extends in a curved manner towards the side near the ejector 1 along the axis near the damper adjusting plate 6.

[0111] Preferably, the outer diameter of the arc-shaped guide surface 61 is larger than the inner diameter of the air inlet, and the inner diameter of the arc-shaped guide surface 61 is smaller than the inner diameter of the air inlet. The arc-shaped guide surface 61 can make the flow path of the primary air bend towards the inside of the ejector 1, improve the guiding effect of the primary air, and avoid turbulence.

[0112] Preferably, the damper adjustment plate 6 is coaxial with the ejector 1, and the damper adjustment plate 6 is threadedly engaged with the nozzle 41. The operator can adjust the size of the primary air inlet 5 by rotating the damper adjustment plate 6.

[0113] Preferably, the outer edge of the damper regulating plate 6 is provided with anti-slip teeth.

[0114] In this embodiment, the setting of the limiting plate 3 can not only ensure the positioning effect of the nozzle 41, but also avoid obstructing the outer periphery of the damper adjusting plate 6, making the damper adjusting plate 6 more convenient for operators to adjust.

[0115] Example 2

[0116] This embodiment provides a gas stove, which includes a housing and an annular air intake burner as described in Embodiment 1.

[0117] In this embodiment, the valve body 4 and the ejector 1 are respectively connected to the outer casing of the gas stove by screws, and the installation position of the valve body 4 and / or the ejector 1 within the outer casing is adjustable. Therefore, the operator can adjust the relative position of the nozzle 41 and the ejector 1 by adjusting the installation position of the valve body 4 and / or the ejector 1 within the outer casing.

[0118] In some possible embodiments, during the installation of the annular air intake burner, the valve body 4 is first fixed inside the housing, and then the ejector 1 is installed. During the installation process, the limiting plate 3 is fitted onto the nozzle 41 through the positioning port 32.

[0119] In some other possible embodiments, during the installation of the annular air intake burner, the ejector 1 is first fixed inside the housing, and then the valve body 4 is installed. During the installation process, the nozzle 41 is inserted into the positioning port 32 of the limiting plate 3.

[0120] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A burner with annular air intake, comprising an ejector (1) and a valve body (4), characterized in that, The air inlet end of the ejector (1) is provided with a limiting plate (3), the limiting plate (3) is provided with an air inlet (31) and a positioning port (32), the positioning port (32) is coaxially matched with the nozzle (41) on the valve body (4), and the nozzle (41) is used for positioning the nozzle (41) on the valve body (4).

2. The annularly fed combustor as recited in claim 1, wherein The end of the nozzle (41) is inserted into the positioning port (32), and an axial positioning structure is arranged between the nozzle (41) and the positioning port (32).

3. The annularly fed combustor as recited in claim 2, wherein The nozzle (41) is provided with an abutting surface (43), the abutting surface (43) is abutted with the side of the limiting plate (3) away from the ejector (1); The limiting plate (3) is fixedly connected with the air inlet end of the ejector (1); or the limiting plate (3) is clamped between the abutting surface (43) and the end surface of the air inlet end of the ejector (1), and a limiting portion (14) is arranged around the outer edge of the limiting plate (3) on the air inlet end of the ejector (1).

4. The annular air inlet burner of claim 3, wherein The ejector (1) comprises a first ejector and a second ejector arranged side by side, the inlets (111) of the convergent sections of the first ejector and the second ejector are flush; the limiting plate (3) covers the inlets (111) of the convergent sections of the first ejector and the second ejector, and abuts with the part between the inlets (111) of the convergent sections of the first ejector and the second ejector.

5. The annular air inlet burner of claim 4, wherein A boss (15) is arranged between the inlets (111) of the convergent sections of the first ejector and the second ejector, the boss (15) protrudes towards the side close to the valve body (4), and the limiting plate (3) abuts with the boss (15); The outer edge of the limiting plate (3) is aligned with the inlets (111) of the convergent sections of the first ejector and the second ejector; The limiting portion (14) is annular, and extends around the edges of the inlets (111) of the convergent sections of the first ejector and the second ejector and the boss (15).

6. Burner with annular air inlet according to any one of claims 3 to 5, characterized in that The mounting position of the nozzle (41) on the valve body (4) is adjustable, and the nozzle (41) can be elongated or shortened relative to the valve body (4); The output pipe (42) of the valve body (4) is coaxial with the ejector (1), and the nozzle (41) is at least partially extended into the output pipe (42) and is threadedly connected between the output pipe (42).

7. The annular air inlet burner of any one of claims 1 to 5, wherein The air inlet (31) is arranged around the positioning port (32) and is arranged in a circular arc shape extending around the axis of the positioning port (32); The air inlet (31) is provided with a plurality of inlets arranged at intervals around the axis of the positioning port (32), and the part of the limiting plate (3) between the adjacent two air inlets (31) constitutes a connecting portion (33); or the air inlet (31) is provided with one air inlet, which is C-shaped, and the part of the limiting plate (3) between the two ends of the air inlet (31) constitutes a connecting portion (33).

8. The annularly fed combustor as in claim 7, wherein, The two ends of the C-shaped air inlet (31) are parallel to each other, and the connecting portion (33) extends along the radial direction of the ejector (1).

9. The burner with annular air inlet according to any of claims 1 to 5, characterized in that The damper adjusting plate (6) sleeved on the nozzle (41) is arranged opposite to the limiting plate (3), and a primary air inlet (5) is formed between the damper adjusting plate (6) and the limiting plate (3), and the primary air inlet (5) is communicated with the air inlet (31); The damper adjusting plate (6) is coaxial with the ejector (1), and the damper adjusting plate (6) is screwed with the nozzle (41).

10. A gas hob, characterized in that The burner comprising the annular air inlet according to any one of claims 1 to 9; The valve body (4) and the ejector (1) are respectively connected in the shell of the gas stove through screws.

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