Combustor and gas stove

Abstract

The utility model provides a burner and a gas stove, the burner comprises an ejector and a valve body, the outlet end of the output pipe of the valve body is used for installing a nozzle matched with the air inlet end of the ejector, the ejector is provided with a first positioning part, the output pipe is provided with a second positioning part corresponding to the first positioning part, and the valve body is arranged on the valve body. And the second positioning part is inserted and matched with the first positioning part. According to the utility model, the second positioning part on the output pipe is inserted into the first positioning part on the ejector, so that the positioning effect between the nozzle of the combustor and the ejector can be improved, and particularly, the positioning effect between the nozzle of the combustor adopting an annular air inlet scheme and the ejector can be improved, and therefore, the positioning effect between the nozzle of the combustor and the ejector can be improved. According to the combustor, the ejection effect of the ejector on primary air can be guaranteed, and meanwhile the assembling efficiency of the combustor adopting the annular air inlet scheme can be improved.

Description

Burners and gas stoves Technical Field

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

[0002] The injector is an important component of a gas stove. Its main function is to mix gas and air in a certain proportion and then deliver the mixture to the burner for ignition. In the prior art, the injector and valve body of a gas stove are usually fixed to the outer casing of the gas stove by screws. For example, Chinese utility model patent application number CN202222240495.8 provides a burner and a gas stove including the same.

[0003] To improve the ejector's effect on primary air and the uniformity of primary air-fuel mixture mixing, the damper adjustment structure has gradually adopted a ring-shaped air inlet design. Specifically, the damper adjustment plate and the ejector's air inlet are spaced apart. Primary air is ejected into the ejector tube from the periphery of the gap between the damper adjustment plate and the ejector's air inlet. The operator changes the amount of primary air ejected by adjusting the distance between the damper adjustment plate and the ejector's air inlet.

[0004] For burners employing annular air intake designs, a common problem is poor positioning between the nozzle and ejector on the valve body. This poor positioning leads to decreased ejection performance, reduced primary air volume, and negatively impacts flue gas quality and energy efficiency in the combustion system. To improve the positioning effect between the nozzle and ejector on the valve body, Chinese invention patent application CN202010477759.4 provides an air damper structure and gas stove, in which a nozzle seat is fixed to the end of the ejector by screws, and the nozzle is fixed on the nozzle seat.

[0005] However, in this design, the assembly between the nozzle seat and the ejector requires screws driven in the horizontal direction, which is not conducive to assembly inside the outer casing and results in low assembly efficiency of the gas stove.

[0006] In view of this, this utility model is hereby proposed. Summary of the Invention

[0007] This invention provides a burner that, by setting a second positioning part on the output pipe to be inserted into a first positioning part on the ejector, improves the ease of assembly while ensuring the positioning effect of the nozzle and ejector, and solves the problem of poor positioning effect between the nozzle and ejector and the difficulty in assembly of existing burners with annular air inlet schemes.

[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 includes an ejector and a valve body. The outlet end of the valve body's output pipe is used to install a nozzle that cooperates with the air inlet end of the ejector. The ejector is provided with a first positioning part, and the output pipe is provided with a second positioning part corresponding to the first positioning part. The second positioning part is inserted into and cooperates with the first positioning part.

[0010] Furthermore, the second positioning part is inserted into the first positioning part along the axial direction of the ejector.

[0011] Furthermore, the second positioning unit includes:

[0012] The connecting part is fixedly connected to the outlet end of the output tube;

[0013] The insertion part is connected to the connecting part and extends along the axial direction of the ejector. The first positioning part is provided with an insertion hole corresponding to the insertion part.

[0014] Furthermore, the ejector includes two ejector tubes arranged side by side in the horizontal direction, namely the first ejector tube and the second ejector tube, and the connecting part connects two output tubes that are respectively coaxially arranged with the first ejector tube and the second ejector tube into one unit.

[0015] Furthermore, the first positioning part is disposed between the inlet of the first ejector tube and the inlet of the second ejector tube, and is vertically spaced from the axes of the first ejector tube and the second ejector tube.

[0016] The connecting part includes a first part that extends horizontally between the two output tubes and a second part that extends vertically from the middle of the first part, with a plug-in part corresponding to the plug hole connected to the end of the second part.

[0017] Furthermore, the outlet end of the output pipe is provided with a reinforcing section with an increased outer diameter, and the first part is connected to the reinforcing section, which is a plate extending in the horizontal direction;

[0018] The first side of the first part is flush with the outlet end of the output tube, and the end of the second side of the first part, which is opposite to the first side, extends obliquely and connects between the end of the reinforcing section and the outer peripheral wall of the output tube.

[0019] Furthermore, a limiting plate is embedded in the air inlet end of the ejector. The limiting plate has an air inlet and a positioning port. The nozzle is coaxially inserted with the positioning port and fits against the side of the limiting plate facing the valve body.

[0020] Furthermore, the nozzle is coaxially installed at the outlet end of the output pipe, and the damper adjustment plate of the burner is sleeved on the nozzle; the damper adjustment plate is threadedly engaged with the nozzle.

[0021] Furthermore, the second positioning part is circumferentially limited to the first positioning part.

[0022] This utility model also provides a gas stove, including the above-mentioned burner;

[0023] The burner's valve body and ejector are fixedly connected to the gas stove's outer casing by screws.

[0024] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0025] 1. By setting the second positioning part on the output pipe to be inserted into the first positioning part on the ejector, this utility model can improve the positioning effect between the nozzle and the ejector of the burner with the annular air intake scheme, thereby ensuring the ejector's ejection effect on primary air and improving the assembly efficiency of the burner with the annular air intake scheme.

[0026] 2. By placing the connecting part between the two output pipes and setting the first positioning part and the axes of the first ejector pipe and the second ejector pipe to be spaced apart in the vertical direction, this utility model can avoid interference between the second positioning part and the damper adjustment plate of the burner. At the same time, it can expose the outer edge of the damper adjustment plate, which is convenient for the user to rotate the damper adjustment plate.

[0027] 3. This utility model, by embedding a limiting plate at the air inlet end of the ejector and setting the nozzle to be coaxially inserted with the positioning port and attached to the side of the limiting plate facing the valve body, can ensure the axial positioning effect between the ejector and the nozzle, avoid the nozzle extending into the ejector too long or too short, and ensure the ejector's ejection effect on primary air.

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0029] 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:

[0030] Figure 1 is an assembly diagram of the valve body and ejector in an embodiment of this utility model;

[0031] Figure 2 is an enlarged view of point A in Figure 1 of the embodiment of this utility model;

[0032] Figure 3 is a cross-sectional view of the cooperation structure between the second positioning part and the first positioning part in an embodiment of the present invention;

[0033] Figure 4 is a cross-sectional view of the outlet end of the output pipe in an embodiment of this utility model;

[0034] Figure 5 is a schematic diagram of the air inlet end of the ejector in an embodiment of this utility model;

[0035] Figure 6 is a schematic diagram of the valve body in an embodiment of this utility model;

[0036] Figure 7 is an enlarged schematic diagram of the connection between the valve body and the ejector when a limiting plate is added in an embodiment of this utility model.

[0037] The main components in the diagram are described as follows: 1. Ejector; 11. First ejector tube; 12. Second ejector tube; 13. First positioning part; 131. Insertion hole; 14. Limiting part; 2. Furnace head; 3. Valve body; 31. Output pipe; 311. Reinforcing section; 32. Second positioning part; 321. Connecting part; 3211. First part; 3212. Second part; 322. Insertion part; 33. Damper adjustment plate; 34. Nozzle; 4. Primary air inlet; 5. Limiting plate; 51. Air inlet.

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In existing technology, the air inlet end of the ejector of a conventional burner is equipped with a damper plate and a damper adjustment plate. The damper plate is fixed to the air inlet end of the ejector and has a fan-shaped air inlet hole and a circular insertion hole. The damper adjustment plate fits against the damper plate, and the opening of the air inlet hole on the damper plate can be adjusted by rotating the damper adjustment plate. The nozzle of the valve body is inserted into the insertion hole, which can achieve a nozzle positioning effect.

[0043] However, for burners that use an annular air intake scheme, in order to increase the air intake area, the damper is eliminated, and there is no direct connection between the ejector and the nozzle. The positioning is only supported by the outer shell of the gas stove, which can easily lead to poor positioning between the nozzle of the valve body and the air intake end of the ejector due to installation errors.

[0044] Some existing technologies propose fixing a nozzle seat to the air inlet end of the ejector with screws to support the nozzle; however, this would increase the assembly steps and difficulty in actual production.

[0045] Example 1

[0046] In this embodiment of the utility model, a gas stove is described, including a housing and a burner, with the burner installed inside the housing.

[0047] The burner can be a burner using a conventional air intake method or a burner using an annular air intake scheme.

[0048] Specifically, this embodiment mainly focuses on the design of a burner using an annular air intake scheme. As shown in Figures 1 to 6, the following description uses a burner with an annular air intake scheme as an example.

[0049] The annular air-inlet burner includes a burner head 2, a burner cap seat, a burner cap, an ejector 1, and a valve body 3. The burner cap seat, burner cap, and ejector 1 are installed on the burner head 2. The burner cap seat is installed on the top of the burner head 2, and the burner cap is installed on the top of the burner cap seat. The ejector 1 is installed at the bottom of the burner head 2, and the air outlet end of the ejector 1 is connected to the interior of the burner head 2. The valve body 3 is installed at the air inlet end of the ejector 1. A nozzle 34 is installed at the outlet end of the output pipe 31 of the valve body 3. The nozzle 34 is inserted into the air inlet end of the ejector 1 and is used to inject gas into the air inlet end of the ejector 1 when the valve body 3 is opened. At the same time, primary air is ejected into the ejector 1.

[0050] As shown in Figures 1 and 2, the air damper adjustment plate 33 of the gas stove is spaced apart from the air inlet end of the ejector 1. Primary air is injected into the ejector 1 from the periphery of the gap between the air damper adjustment plate 33 and the air inlet end of the ejector 1. The operator changes the amount of primary air injected by adjusting the distance between the air damper adjustment plate 33 and the air inlet end of the ejector 1. That is, the gap between the air damper adjustment plate 33 and the air inlet end of the ejector 1 constitutes the primary air inlet 4.

[0051] As shown in Figure 3, in this embodiment, the ejector 1 is provided with a first positioning part 13, and the output pipe 31 of the valve body 3 is provided with a second positioning part 32 corresponding to the first positioning part 13. The second positioning part 32 is inserted into the first positioning part 13. By setting the second positioning part 32 on the output pipe 31 to be inserted into the first positioning part 13 on the ejector 1, the positioning effect between the valve body 3 and the ejector 1 of the burner with the annular air intake scheme can be improved. Specifically, the positioning effect between the nozzle 34 and the air intake end of the ejector 1 can be improved, thereby ensuring the ejection effect of the ejector 1 on the primary air. At the same time, the assembly efficiency of the burner with the annular air intake scheme can also be improved.

[0052] Specifically, the first positioning part 13 is provided with a plug hole 131, and the second positioning part 32 is provided with a plug part 322 corresponding to the plug hole 131. When installing the annular air intake burner, the plug part 322 is inserted into the plug hole 131 to achieve positioning between the valve body 3 and the ejector 1.

[0053] The second positioning part 32 and the first positioning part 13 can be inserted along the axial direction of the ejector 1, that is, the insertion hole 131 and the insertion part 322 extend along the axial direction of the ejector 1; the second positioning part 32 and the first positioning part 13 can also be inserted along the radial direction of the ejector 1, that is, the insertion hole 131 and the insertion part 322 extend along the radial direction of the ejector 1.

[0054] In this embodiment, the axial direction of the ejector 1 is parallel to the axis of the ejector tube of the ejector 1, and the radial direction of the ejector 1 is perpendicular to the axial direction of the ejector 1.

[0055] Preferably, in this embodiment, the second positioning part 32 and the first positioning part 13 are inserted into the ejector 1 along the axial direction, which can adapt to the assembly method of the nozzle 34 being inserted into the air inlet end of the ejector 1 along the axial direction, and further improve the assembly efficiency.

[0056] As shown in Figures 2 and 6, in this embodiment, the second positioning part 32 includes a connecting part 321 and a plug-in part 322. The connecting part 321 is fixedly connected to the outlet end of the output pipe 31, and the plug-in part 322 is connected to the connecting part 321. The plug-in part 322 extends along the axial direction of the ejector 1. The plug-in hole 131 corresponding to the plug-in part 322 is provided on the air inlet end of the ejector 1 on the first positioning part 13. The plug-in hole 131 extends along the axial direction of the ejector 1.

[0057] Preferably, the plug-in portion, the connecting portion, and the output tube are connected as a whole.

[0058] The ejector 1 may include a single ejector tube or multiple ejector tubes arranged in parallel. When multiple ejector tubes are provided, the second positioning part 32 is integrated with the output tube 31 corresponding to each ejector tube. Preferably, when multiple ejector tubes are provided, the first positioning part 13 is located between the inlets of two adjacent ejector tubes.

[0059] Specifically, the ejector tube includes a contraction section and a mixing section arranged sequentially from the inlet to the outlet. The inner diameter of the contraction section gradually decreases towards the outlet, and the mixing section extends from the outlet of the contraction section, with the inner diameter of the mixing section being the same as the inner diameter of the outlet of the contraction section. The high-speed, high-energy flow of gas output from the nozzle 34 enters the mixing section through the contraction section, and the surrounding air is drawn into the mixing section by the jet and mixed with the gas.

[0060] In some preferred embodiments, the outlet of the mixing section is further provided with a diffusion section, the inlet inner diameter of which is the same as the outlet inner diameter of the mixing section, and the inner diameter of the diffusion section gradually increases along the direction close to the outlet of the ejector tube in order to reduce the flow velocity and increase the static pressure.

[0061] In this embodiment, the inlets of multiple ejector tubes arranged in parallel together constitute the air inlet of the ejector 1, and the outlets of multiple ejector tubes arranged in parallel together constitute the air outlet of the ejector 1.

[0062] In some specific embodiments, the ejector 1 includes a first ejector tube 11 and a second ejector tube 12 arranged side by side in the horizontal direction. The connecting part 321 connects two output tubes 31 that are coaxially arranged with the first ejector tube 11 and the second ejector tube 12 to form a whole, which can improve the integrity of the valve body 3.

[0063] Specifically, the furnace head 2 includes an inner ring cavity and an outer ring cavity surrounding the inner ring cavity. The first ejector tube 11 is connected to the inner ring cavity, and the second ejector tube 12 is connected to the outer ring cavity.

[0064] In this embodiment, the first positioning part 13 is disposed between the inlet of the first ejector tube 11 and the inlet of the second ejector tube 12, and is vertically spaced from the axes of the first ejector tube 11 and the second ejector tube 12.

[0065] Specifically, the axis of the first ejector tube 11 and the axis of the second ejector tube 12 are on the same horizontal plane. The inlet of the first ejector tube 11 and the inlet of the second ejector tube 12 are arranged side by side and are flush with each other. The outer peripheral wall of the inlet of the first ejector tube 11 and the outer peripheral wall of the inlet of the second ejector tube 12 are connected as one piece.

[0066] In this embodiment, since both the inlet of the first ejector tube 11 and the inlet of the second ejector tube 12 are circular, the interval between the inlets of the first ejector tube 11 and the second ejector tube 12 is smaller in the middle and larger at both ends. By positioning the first positioning part 13 at a vertical distance from the axes of the first ejector tube 11 and the second ejector tube 12, it is ensured that the first positioning part 13 has sufficient area to accommodate the insertion hole 131.

[0067] Preferably, to ensure the integrity of the ejector 1, the maximum distance between the edge of the first positioning part 13 and the horizontal plane containing the axes of the first ejector tube 11 and the second ejector tube 12 is less than or equal to the outer diameter of the inlet of the first ejector tube 11, and less than or equal to the outer diameter of the inlet of the second ejector tube 12. Specifically, the outer edge of the first positioning part 13 protrudes to a maximum extent until it is flush with the outer peripheral wall of the inlet of the ejector tube with the smaller outer diameter.

[0068] Preferably, the inlet of the first ejector tube 11 and the inlet of the second ejector tube 12 have the same outer diameter, and the maximum distance between the edge of the first positioning part 13 and the horizontal plane containing the axes of the first ejector tube 11 and the second ejector tube 12 is less than the outer diameter of the first ejector tube 11.

[0069] In this embodiment, the connecting part 321 includes a first part 3211 that is disposed between two output tubes 31 and extends horizontally, and a second part 3212 that extends vertically from the middle of the first part 3211. The two ends of the first part 3211 are respectively connected to the outer peripheral wall of one output tube 31, and the plug-in part 322 corresponding to the plug-in hole 131 is connected to the end of the second part 3212.

[0070] In some possible embodiments, a first positioning part 13 is provided on the upper and lower sides of the plane containing the axes of the first ejector tube 11 and the second ejector tube 12, and the second positioning part 32 is provided with two insertion parts 322, each insertion part 322 being inserted into a corresponding first positioning part 13.

[0071] In this embodiment, the first part 3211 and the second part 3212 of the connecting part 321 are cross-shaped.

[0072] In some other possible embodiments, a first positioning part 13 is provided on the upper or lower side of the plane containing the axes of the first ejector tube 11 and the second ejector tube 12, and a plug-in part 322 is provided to be plugged into the first positioning part 13.

[0073] In this embodiment, the first part 3211 and the second part 3212 of the connecting part 321 are T-shaped.

[0074] In this embodiment, by setting the connecting part 321 between the two output pipes 31 and setting the first positioning part 13 to be spaced apart from the axes of the first ejector tube 11 and the second ejector tube 12 in the vertical direction, it is possible to avoid interference between the second positioning part 32 and the damper adjustment plate 33 of the burner. At the same time, the outer edge of the damper adjustment plate 33 can be exposed, which is beneficial for the user to rotate the damper adjustment plate 33.

[0075] As shown in Figure 4, in some preferred embodiments, the outlet end of the output pipe 31 is provided with a reinforcing section 311 with an increased outer diameter, and a first part 3211 is connected to the reinforcing section 311 and is a plate extending in the horizontal direction.

[0076] As shown in Figure 6, the first part 3211 is a plate extending radially along the output pipe 31, and the two ends of the first part 3211 are respectively connected to the outer peripheral wall of a reinforcing section 311.

[0077] Preferably, the first side of the first portion 3211 is flush with the outlet end of the output tube 31, and the end of the second side of the first portion 3211 opposite to the first side extends obliquely and connects between the end of the reinforcing section 311 and the outer peripheral wall of the output tube 31. In this embodiment, the first side of the first portion 3211 is the side closer to the ejector 1, and the second side of the first portion 3211 is the side farther away from the ejector 1.

[0078] The second part 3212 is a plate-shaped part that extends vertically from the middle of the first part 3211. The lower end of the second part 3212 is connected to the middle of the first part 3211, and the upper end of the second part 3212 is used to connect the plug-in part 322.

[0079] Preferably, the side of the second portion 3212 away from the ejector 1 is flush with the second side of the first portion 3211, and the side of the second portion 3212 near the ejector 1 extends obliquely from the first side of the first portion 3211 toward the ejector 1 to improve the connection strength with the insertion portion 322.

[0080] In this embodiment, the plug-in portion 322 is spaced apart from the outer edge of the damper adjustment plate 33, and the second portion 3212 is spaced apart from the outer edge of the damper adjustment plate 33 on the side near the ejector 1.

[0081] In this embodiment, the insertion portion 322 is cylindrical. Specifically, the insertion portion 322 can be cylindrical or prismatic, and its cross-section can also be elliptical. The internal shape of the insertion hole 131 is adapted to the shape of the insertion portion 322.

[0082] In some preferred embodiments, the second positioning part 32 and the first positioning part 13 are circumferentially positioned together.

[0083] Specifically, the cross-section of the insertion part 322 can be non-circular, for example, it can be polygonal or elliptical; alternatively, a convex ridge and a groove that cooperate with each other can be provided between the outer wall of the insertion part 322 and the inner wall of the insertion hole 131. For example, a groove extending along the axial direction of the insertion part 322 can be provided on the outer wall of the insertion part 322, and a protrusion corresponding to the groove can be provided on the inner wall of the insertion hole 131. When the second positioning part 32 is inserted into the first positioning part 13, the groove is fitted onto the protrusion.

[0084] In this embodiment, the nozzle 34 is coaxially mounted at the outlet end of the output pipe 31. Preferably, the nozzle 34 and the outlet end of the output pipe 31 are threaded together. Specifically, the nozzle 34 has an external thread on its exterior, and the inner circumference of the reinforcing section 311 has an internal thread that mates with the external thread on the nozzle 34. The middle part of the nozzle 34 protrudes outward along the radial direction of the nozzle 34, and the outer peripheral wall of the protruding part is set as a prism surface. The nozzle 34 is tightened to the outlet end of the output pipe 31, and the protruding part of the nozzle 34 abuts against the end face of the outlet end of the output pipe 31.

[0085] Preferably, the cross-section of the outwardly protruding portion of the nozzle 34 is a regular hexagon.

[0086] In this embodiment, the burner's damper adjusting plate 33 is sleeved on the nozzle 34 and threadedly engaged with the nozzle 34. The operator can adjust the size of the primary air inlet 4 by rotating the damper adjusting plate 33.

[0087] Preferably, the outer edge of the damper adjustment plate 33 is provided with anti-slip teeth.

[0088] In some preferred embodiments, a limiting portion 14 is provided on the air inlet end of the ejector 1 around the inlet of the first ejector tube 11 and the inlet of the second ejector tube 12. The limiting portion 14 protrudes vertically outward from the air inlet end of the ejector 1, and the provision of the limiting portion 14 can improve the guidance of airflow.

[0089] In some preferred embodiments, the damper adjustment plate 33 is provided with an arc-shaped guide surface on the side facing the ejector 1. The arc-shaped guide surface is provided near the outer edge of the damper adjustment plate 33 and extends in a curved manner towards the side near the ejector 1 along the axis of the damper adjustment plate 33.

[0090] Preferably, the outer diameter of the arc-shaped guide surface is larger than the inner diameter of the corresponding ejector tube inlet, and the inner diameter of the arc-shaped guide surface is smaller than the inner diameter of the corresponding ejector tube inlet. The arc-shaped guide surface enables the primary air flow path to bend towards the inside of the ejector 1, improving the guiding effect of the primary air and avoiding turbulence.

[0091] Example 2

[0092] As shown in Figure 7, this embodiment provides a burner with annular air intake. The burner with annular air intake is based on the burner with annular air intake in the first embodiment above, with the addition of a limiting plate 5.

[0093] Specifically, the air inlet end of the ejector 1 is fitted with a limiting plate 5, and the limiting plate 5 has an air inlet 51 and a positioning port. The nozzle 34 is coaxially inserted with the positioning port and fits against the side of the limiting plate 5 facing the valve body 3.

[0094] Preferably, the air inlet 51 is arranged around the positioning port, and the air inlet 51 is set in a C shape to ensure the air intake area of ​​the primary air.

[0095] The nozzle 34 is provided with a connector with a reduced outer diameter at its end. The outer diameter of the connector is adapted to the inner diameter of the positioning port. The end face of the nozzle 34 on the outer periphery of the connector abuts against the limiting plate 5.

[0096] In this embodiment, by embedding a limiting plate 5 at the air inlet end of the ejector 1, and setting the nozzle 34 to be coaxially inserted with the positioning port and to be in contact with the side of the limiting plate 5 facing the valve body 3, the axial positioning effect between the ejector 1 and the nozzle 34 can be guaranteed, and the length of the nozzle 34 extending into the ejector 1 should be avoided to be too long or too short, thus ensuring the ejector 1's ejection effect on primary air.

[0097] Preferably, the outer edge of the limiting plate 5 is fitted to the inner circumference of the limiting part 14, and the side of the limiting plate 5 facing the ejector 1 is fitted to the part between the inlet of the first ejector tube 11 and the inlet of the second ejector tube 12.

[0098] Preferably, the end face of the nozzle 34 is flush with the inlet of the corresponding ejector tube. That is, the end face of the nozzle 34 corresponding to the first ejector tube 11 is flush with the inlet of the constriction section of the first ejector tube 11; the end face of the nozzle 34 corresponding to the second ejector tube 12 is flush with the inlet of the constriction section of the second ejector tube 12.

[0099] Specifically, experimental verification showed that the ejection effect of primary air is best when the end face of nozzle 34 is flush with the inlet of the constriction section of ejector tube. Therefore, the position where the end face of nozzle 34 is flush with the inlet of the constriction section of ejector tube is taken as the set position for the installation of nozzle 34 and ejector 1.

[0100] Example 3

[0101] In this embodiment, a gas stove is described, which includes a housing and an annular air intake burner as described in Embodiment 1 or Embodiment 2.

[0102] Specifically, the valve body 3 and the ejector 1 are respectively connected to the outer casing of the gas stove by screws.

[0103] In some 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 3 is installed. During installation, the insertion part 322 of the second positioning part 32 is inserted into the insertion hole 131 of the first positioning part 13. After the valve body 3 is adjusted into place, it is fixed inside the housing with screws.

[0104] 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 comprising an ejector (1) and a valve body (3), wherein the outlet end of the outlet pipe (31) of the valve body (3) is used to install a nozzle (34) that mates with the air inlet end of the ejector (1), characterized in that, The ejector (1) is provided with a first positioning part (13), and the output tube (31) is provided with a second positioning part (32) corresponding to the first positioning part (13). The second positioning part (32) is inserted into the first positioning part (13).

2. The burner according to claim 1, characterized in that, The second positioning part (32) and the first positioning part (13) are inserted into each other along the axial direction of the ejector (1).

3. The burner according to claim 2, characterized in that, The second positioning part (32) includes: a connecting part (321) which is fixedly connected to the outlet end of the output tube (31); a plug-in part (322) which is connected to the connecting part (321) and extends along the axial direction of the ejector (1); and a plug-in hole (131) corresponding to the plug-in part (322) is provided on the first positioning part (13).

4. The burner according to claim 3, characterized in that, The ejector (1) includes two ejector tubes arranged side by side in the horizontal direction, and the connecting part (321) connects two output tubes (31) that are coaxially arranged with the two ejector tubes respectively into one unit.

5. The burner according to claim 4, characterized in that, The first positioning part (13) is disposed between the inlets of the two ejector tubes and is vertically spaced from the axes of the two ejector tubes; the connecting part (321) includes a first part (3211) that extends horizontally between the two output tubes (31) and a second part (3212) that extends vertically from the middle of the first part (3211); the plug-in part (322) is connected to the end of the second part (3212).

6. The burner according to claim 5, characterized in that, The outlet end of the output pipe (31) is provided with a reinforcing section (311) with an increased outer diameter. The first part (3211) is connected to the reinforcing section (311) and is a plate extending in the horizontal direction. The first side of the first part (3211) is flush with the outlet end of the output pipe (31), and the end of the second side of the first part (3211) opposite to the first side extends obliquely and is connected between the end of the reinforcing section (311) and the outer peripheral wall of the output pipe (31).

7. The burner according to any one of claims 2 to 6, characterized in that, The air inlet of the ejector (1) is fitted with a limiting plate (5), and the limiting plate (5) has an air inlet (51) and a positioning port. The nozzle (34) is coaxially inserted with the positioning port and fits against the side of the limiting plate (5) facing the valve body (3).

8. The burner according to any one of claims 1 to 6, characterized in that, The nozzle (34) is coaxially mounted at the outlet end of the output pipe (31), and the damper adjustment plate (33) of the burner is sleeved on the nozzle (34); the damper adjustment plate (33) and the nozzle (34) are threaded together.

9. The burner according to any one of claims 1 to 6, characterized in that, The second positioning part (32) and the first positioning part (13) are circumferentially limited and matched.

10. A gas stove, characterized in that, The burner includes any one of claims 1 to 9; the valve body (3) and ejector (1) of the burner are respectively fixedly connected to the outer casing of the gas stove by screws.

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