A burner head

Abstract

The present invention discloses a burner burner head, which includes a burner head body and a gas combing device. The burner head body is provided with a gas mixing cavity and at least two gas channels. The gas combing device includes at least two convex portions, which are arranged in the gas mixing cavity and above the outlets of the gas channels. The convex portions are provided with gas combing channels, and an air inlet and an air outlet respectively communicating with the gas combing channels. The air outlet communicates with at least part of the outlets of the gas channels. The air outlet is arranged towards the central axis of the gas mixing cavity and is used for making the gas flow out in the horizontal direction. The gas mixing cavity communicates with the air outlet. By providing convex portions with gas combing channels, when the gas flows through the gas combing channels, its flow rate is reduced and its flow direction is changed, realizing the combing of the flow direction and flow rate of the gas flowing into the gas mixing cavity, making the combustion more uniform and stable, and at the same time, the extinguishing noise can be effectively suppressed.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking stoves, and particularly to a burner head for a cooking stove. Background Art

[0002] The combustion system of a household gas stove mainly consists of a burner head and a burner cap. The gas premixed in the burner head cavity reaches the burner cap directly through the gas distribution channels of the burner head and burns through the burner holes. However, the gas velocities from the gas distribution channels of the burner head to various positions of the burner cap in the existing burner are different. In this way, it will lead to inconsistent flame states during combustion, affecting the combustion effect and combustion performance.

[0003] In addition, when the burner performs an extinguishing operation, especially for the outer burner cap, generally, the entire outer burner cap does not extinguish simultaneously, but first extinguishes locally, and then completely extinguishes due to the complete cut-off of the gas within a short period of time. After the outer burner cap extinguishes locally, a negative pressure is formed in the local burner cap cavity, and external air is pressed into the outer burner cap cavity from the burner holes. When the external air mixes with the residual gas in the burner cap cavity and the outer ring air cavity of the burner head to reach a certain ratio, it is ignited by the still burning burner holes, causing an explosion and generating extinguishing noise. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the related art to a certain extent. For this purpose, the present invention provides a burner head, which can not only sort out the gas flow direction and velocity flowing into the gas mixing cavity of the burner head to make the combustion more uniform and stable, but also effectively suppress the effect of extinguishing noise.

[0005] According to the above-provided burner head, it is realized through the following technical solutions:

[0006] A burner head includes a burner head body. The burner head body is provided with an upward-opening gas mixing cavity and at least two gas channels. It further includes a gas sorting device, which includes at least two protruding parts. The protruding parts are arranged in the gas mixing cavity and above the outlets of the gas channels. And the protruding parts are provided with gas combing channels for changing the gas flow direction, and an air inlet and an air outlet respectively communicating with the gas combing channels. The air outlet communicates with at least part of the outlets of the gas channels. The air outlet is arranged towards the central axis of the gas mixing cavity and is used for making the gas flow out horizontally. The gas mixing cavity communicates with the air outlet.

[0007] In some embodiments, the gas combing channel includes a guiding surface facing the air outlet. One side of the guiding surface abuts against or is connected to the outer ring wall of the gas mixing cavity, and the other side extends obliquely upward and leaves a gap with the inner ring wall of the gas mixing cavity.

[0008] In some embodiments, the gas combing channel further includes a top surface which is a horizontally arranged plane or an inclined surface inclined in the vertical direction, and there is a gap between one side of the top surface connecting the flow guiding surface and the inner ring wall of the gas mixing cavity on the other side.

[0009] In some embodiments, the top of the convex portion is lower than the upper end surface of the gas mixing cavity, the height of the convex portion is 3 mm to 8 mm, and the flow guiding surface is an inclined surface or a curved surface.

[0010] In some embodiments, the length of the air inlet is greater than the length of the outlet of the gas channel, and the outlet of the gas channel communicates with the air inlet of the gas combing channel.

[0011] In some embodiments, the length of the gas combing channel is less than or equal to the arc length between the center lines of the outlets of two adjacent gas channels, and the length of the air outlet is equal to the length of the gas combing channel.

[0012] In some embodiments, the gas combing device further includes a blocking portion arranged between two adjacent convex portions, the blocking portion covers a part of the outlet of the gas channel, and the other part of the outlet of the gas channel communicates with the air inlet of the gas combing channel or respectively communicates with the air inlets of two adjacent gas combing channels.

[0013] In some embodiments, the blocking portion covers the middle of the outlet of the gas channel and defines a left outlet and a right outlet, and the left outlet and the right outlet respectively communicate with the air inlets of two adjacent gas combing channels.

[0014] In some embodiments, the gas channel includes a first gas channel and a second gas channel, and the left outlet of the first gas channel and the right outlet of the second gas channel respectively communicate with the same gas combing channel through the air inlet.

[0015] In some embodiments, the gas combing device is an annular baffle installed in the gas mixing cavity, the outer side and the inner side of the annular baffle respectively abut against or are connected to the outer ring wall and the inner ring wall of the gas mixing cavity, and the bottom of the annular baffle abuts against or has a gap with the bottom of the gas mixing cavity. The convex portions equal in number to the gas channels are arranged at intervals on the annular baffle, and the blocking portion is formed by the flat plate portion of the annular baffle between two adjacent convex portions.

[0016] In some embodiments, the convex portion is integrally formed by outward stamping and stretching of a part of the annular baffle, and the inner side of the convex portion is cut and separated from the annular baffle to form the air outlet, and an opening forming the air inlet is formed at the bottom of the convex portion.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] A burner head of the present invention, by providing a convex portion with a gas combing channel, when the gas flows through the gas combing channel, its flow rate is reduced and the flow direction is changed, realizing the combing of the flow direction and flow rate of the gas flowing into the air mixing chamber, ensuring that the gas flow rates at various positions inside the burner cap are substantially the same, making the combustion more uniform and stable, and at the same time, it can also effectively suppress the extinguishing noise effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the burner head in Embodiment 1 of the present invention;

[0020] Figure 2 is a schematic structural diagram of the burner body in Embodiment 1 of the present invention;

[0021] Figure 3 is a cross-sectional view of the burner head in Embodiment 1 of the present invention;

[0022] Figure 4 is a schematic structural diagram of the gas combing device in Embodiment 1 of the present invention;

[0023] Figure 5 is a partial structural schematic diagram of the gas combing device in Embodiment 1 of the present invention;

[0024] Figure 6 is a schematic structural diagram of the gas combing device in Embodiment 2 of the present invention;

[0025] Figure 7 is a partial structural schematic diagram of the gas combing device in Embodiment 2 of the present invention;

[0026] Figure 8 is an exploded schematic diagram of the burner body and the gas combing device in Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] The following embodiments illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific implementation manner of the present invention or equivalently replacing some technical features without departing from the spirit of the present invention's solution shall be covered within the scope of the technical solution claimed by the present invention.

[0028] Embodiment 1

[0029] The outer-ring gas flow path of the existing burner is as follows: After the gas flows out of the gas passage of the burner head, it is generally divided into two parts. One part directly flows upward into the burner cap cavity, and the other part flows to the left and right sides of the outlet of the burner head gas passage. It first gradually fills the outer-ring gas cavity of the burner head and then overflows upward to the burner cap cavity. The gas in the burner cap cavity flows out and burns from the burner cap flame holes. Since the gas flow rate of the gas flowing directly upward from the gas passage of the burner head is greater than the gas flow rate of the gas flowing upward in the outer-ring gas cavity of the burner head, in this way, the gas flow rates at various positions flowing into the burner cap cavity are different. When the existing burner performs the flameout operation, the gas flow rate in the gas passage of the burner head drops suddenly. After the gas in the corresponding local burner cap cavity burns out, the corresponding local flame holes go out first, and then all the other flame holes go out due to the complete cut-off of the gas in a short time. During this process, a negative pressure is formed in the burner cap cavity, causing external air to be pressed into the burner cap cavity from the burner cap flame holes. When the external air mixes with the residual gas in the burner cap cavity and the outer-ring gas cavity of the burner head to reach a certain proportion, it is ignited by the still-burning flame holes, resulting in an explosion, generating a flameout noise and affecting the user experience.

[0030] As Figures 1 to 5 shown, to solve the above problems, the present embodiment provides a burner head, including a burner head body 1 and a gas combing device 2. The burner head body 1 is provided with a mixing cavity 11 with an upward opening and at least two gas passages 12 communicating with the mixing cavity 11. The mixing cavity 11 is a ring-shaped structure with an inner ring wall 111 and an outer ring wall 112. The at least two gas passages 12 are evenly spaced along the circumferential direction of the mixing cavity 11 to ensure that the gas entering the mixing cavity 11 is relatively uniform. The gas combing device 2 includes at least two protruding parts 3. Above the outlet of each gas passage 12, there is a protruding part 3 located in the mixing cavity 11. The protruding part 3 is provided with a gas combing channel (not shown in the figure) for changing the gas flow direction, and an air inlet 301 and a gas combing channel respectively communicating with the gas combing channel. The air outlet 302 is arranged at the bottom of the protruding part 3 and communicates with at least part of the outlet of the gas passage 12. The air outlet 302 is arranged towards the central axis of the mixing cavity 11 and is used to make the gas flow out horizontally. The mixing cavity 11 communicates with the air outlet 302.

[0031] Thus, by providing the convex portion 3 with the gas combing channels, the gas flow path of the burner is changed. The specific gas flow path is as follows: The gas flows vertically upward from the gas channel 12, flows into the gas combing channels through the air inlet 301, and its flow rate decreases and the flow direction changes under the influence of the gas combing channels (i.e., the convex portion 3), and flows out from the air outlet 302 in the horizontal direction and towards the central axis of the gas mixing chamber 11, and flows into the region between the inner ring wall 111 of the gas mixing chamber 11 and the convex portion 3 for premixing. The gas gradually fills the region between the inner ring wall 111 of the gas mixing chamber 11 and the convex portion 3 first, and then fills the entire gas mixing chamber 11 and overflows upward to the cavity of the burner cap, so that the gas flow rates at various positions flowing into the cavity of the burner cap are substantially the same. Finally, it flows out from the flame holes of the burner cap and burns. In addition, since the gas flow rates at various positions flowing into the cavity of the burner cap are substantially the same, when the burner is extinguished, the flow rate decreases synchronously due to the gas cut-off, and the residual gas inside the burner burns out almost simultaneously, and the flame holes of the entire burner cap are extinguished at the same time. No negative pressure is formed inside the burner cap, and thus the condition for external air to enter the cavity of the burner cap and cause an explosion cannot be formed. Therefore, the extinguishing noise can be effectively reduced.

[0032] It can be seen that for a burner head according to this embodiment, by providing the convex portion 3 with the gas combing channels above the outlet of the gas channel 12, the air inlet 301 of the gas combing channels is connected to at least a part of the outlet of the gas channel 12, and the air outlet 302 of the gas combing channels is arranged towards the central axis of the gas mixing chamber 11 and is used to make the gas flow out in the horizontal direction, so that when the gas flows through the gas combing channels, its flow rate decreases and the flow direction changes, realizing the combing of the gas flow direction and flow rate flowing into the gas mixing chamber 11, ensuring that the gas flow rates at various positions flowing into the inside of the burner cap are substantially the same, making the combustion more uniform and stable, and at the same time, the effect of effectively suppressing the extinguishing noise can also be achieved.

[0033] Preferably, the number of the gas channels 12 and the protrusions 3 is four each. The four gas channels 12 are evenly spaced in the circumferential direction and divide the bottom surface of the gas mixing chamber 11 into four sections, so as to improve the gas distribution uniformity. The length of the protrusion 3 is greater than one-fourth of the bottom surface of the gas mixing chamber 11 and less than or equal to the arc length between the centerlines of the outlets of two adjacent gas channels 12. The length of the gas combing channel is slightly less than the length of the protrusion 3. The lengths of the air inlet 301 and the air outlet 302 are both equal to the length of the gas combing channel. Thereby, it is ensured that the length of the air inlet 301 is greater than the length of the outlet of the gas channel 12. When the protrusion 3 is located between the outlets of two adjacent gas channels 12, the air inlet 301 of the gas combing channel can communicate with partial outlets of two adjacent gas channels 12 respectively. In addition, the distance between two adjacent air outlets 302 can be shortened, so that the total length of all the air outlets 302 is almost close to the perimeter of the inner ring wall 111 of the gas mixing chamber 11, the unit air outlet area is increased, and it is ensured that the gas flows out of the gas mixing chamber 11 more evenly from the air outlets 302, which is beneficial to the gas filling the gas mixing chamber 11 better. Furthermore, the gas flow velocities at various positions of the cavity flowing into the burner cap are approximately the same, and the combustion uniformity and stability are improved.

[0034] Preferably, the top of the protrusion 3 is lower than the upper end surface of the gas mixing chamber 11, and the height of the protrusion 3 is 3 mm to 8 mm, so that the gas can first fill the top area of the protrusion 3 and then overflow upward to the cavity of the burner cap, ensuring that the gas flow velocities at various positions of the cavity flowing into the burner cap are generally the same. In this embodiment, the height of the protrusion 3 is preferably 4.5 mm.

[0035] As Figure 1 and Figure 5 shown, specifically, the protrusion 3 includes a top surface 30, a diversion surface 31 facing the air outlet 302, a left side surface 32 and a right side surface 33. One side of the diversion surface 31 abuts against or is connected to the outer ring wall 112 of the gas mixing chamber 11, and the other side extends obliquely upward and is connected to one side of the top surface 30. A gap is left between the other side of the top surface 30 and the inner ring wall 111 of the gas mixing chamber 11 for the gas to pass through. The left side surface 32 is respectively connected to the left ends of the diversion surface 31 and the top surface 30, and the right side surface 33 is respectively connected to the right ends of the diversion surface 31 and the top surface 30. In this way, the top surface 30, the diversion surface 31, the left side surface 32 and the right side surface 33 enclose a gas channel 12 with a downward opening and an opening toward the central axis of the gas mixing chamber 11. The air inlet 301 is formed by the downward opening, and the air outlet 302 is formed by the opening toward the central axis of the gas mixing chamber 11.

[0036] Preferably, the flow guiding surface 31 is an arc surface, which is composed of a first arc surface and a second arc surface that are connected to each other and have an arc transition. The second arc surface is located between the first arc surface and the top surface 30. In this way, the gas can be better guided to flow upward to the top surface 30. The top surface 30 is a horizontally arranged plane, so that when the gas flows upward, the influence of the top surface 30 reduces the flow rate, and the flow direction of the gas can be better turned in the horizontal direction, further ensuring that the gas flowing out of the air outlet 302 faces the horizontal direction and the central axis of the mixing chamber 11. The left side surface 32 and the right side surface 33 are both inclined surfaces that are inclined toward the inside of the gas passage 12 to better guide the gas to the top surface 30.

[0037] In other embodiments, the flow guiding surface 31 can be an inclined surface that is inclined in the vertical direction, and the top surface 30 can be an inclined surface that is inclined in the vertical direction to further increase the air outlet area of the air outlet 302.

[0038] As Figure 1 and Figure 4 As shown, further, the gas combing device 2 further includes a blocking portion 4 provided between two adjacent convex portions 3. In this embodiment, the left and right ends of the blocking portion 4 are respectively connected to the convex portions 3. In this way, through the blocking portion 4, a firm and reliable connection between two adjacent convex portions 3 is achieved, making the installation of all the convex portions 3 more convenient and rapid, and improving the assembly efficiency of the gas combing device 2.

[0039] Preferably, the gas combing device 2 is an annular baffle installed in the mixing chamber 11. The outer side and the inner side of the annular baffle respectively abut against or are connected to the outer ring wall 112 and the inner ring wall 111 of the mixing chamber 11 to prevent the gas from flowing upward from the mating portions of the annular baffle with the outer ring wall 112 and the annular baffle with the inner ring wall 111, and the bottom of the annular baffle abuts against the bottom of the mixing chamber 11 to improve the installation stability and reliability of the gas combing device 2. Four convex portions 3 are evenly arranged at intervals along the circumferential direction on the annular baffle, and the blocking portion 4 is composed of the flat plate portion of the annular baffle located between two adjacent convex portions 3.

[0040] In other embodiments, a gap can also be left between the bottom of the annular baffle and the bottom of the mixing chamber 11. In this way, the annular baffle divides the mixing chamber 11 into upper and lower parts. The lower part of the mixing chamber 11 is communicated with the gas combing channel through the air inlet 301, and the upper part of the mixing chamber 11 is communicated with the gas combing channel through the air outlet 302. In this way, the gas flows out from the outlet of the gas passage 12, first flows into the lower part of the mixing chamber 11, then flows through the gas combing channel, and its flow rate is reduced and its flow direction is turned under the influence of the gas combing channel, so as to flow out from the air outlet 302 in the direction of the horizontal direction and the central axis of the mixing chamber 11, flow into the upper part of the mixing chamber 11, and after filling the upper part of the mixing chamber 11, it overflows upward to the cavity of the burner cap.

[0041] More preferably, the convex part 3 is integrally formed by stamping and stretching outwards from a part of the annular baffle, and the inner side of the convex part 3 is cut and separated from the annular baffle to form an air outlet 302, and an opening constituting an air inlet 301 is formed at the bottom of the convex part 3. Thus, the integral molding of the blocking part 4 and the convex part 3 improves the processing and molding speed of the convex part 3, and improves the connection firmness and reliability between the convex part 3 and the blocking part 4.

[0042] In this embodiment, according to the matching degree between the air inlet 301 and the outlet of the gas channel 12, the installation methods of the gas combing device 2 can be divided into three types:

[0043] The first type: The convex part 3 is arranged directly above the outlet of the gas channel 12, and the blocking part 4 is located between the outlets of two adjacent gas channels 12. In this way, the air inlet 301 of each air combing channel communicates with all the outlets of the corresponding gas channel 12. When the gas flows upward from the gas channel 12, it directly enters the air combing channel through the air inlet 301. Affected by the guiding surface 31 and the top surface 30, its flow rate decreases and the flow direction turns. First, premixing is carried out in the air combing channel, and then it flows out from the air outlet 302 in the direction towards the horizontal direction and the central axis of the mixing chamber 11, and flows into and fills the mixing chamber 11.

[0044] In the first installation method, a positioning part 13 is provided at the bottom of the mixing chamber 11, and a matching part 21 is provided at the position of the annular baffle (i.e., the blocking part 4) corresponding to the positioning part 13. The matching part 21 is matched and clamped with the positioning part 13. In this way, through the matching of the matching part 21 and the positioning part 13, the gas combing device 2 is installed in the mixing chamber 11 more stably and reliably. Preferably, the positioning part 13 is a positioning post, the matching part 21 is a positioning hole, four positioning posts are evenly distributed along the circumferential direction at the bottom of the mixing chamber 11, and correspondingly, four positioning holes are evenly distributed along the circumferential direction on the annular baffle. In this way, through the matching and clamping of the four positioning posts and the four positioning holes, the convex part 3 and the blocking part 4 are effectively prevented from shifting under the action of the air flow, and the stability and reliability of the installation of the gas combing device 2 are further enhanced.

[0045] The second type: The blocking part 4 is arranged above the outlet of the gas channel 12 and covers the left or right side of the opening of the gas channel 12. The remaining part of the outlet of the gas channel 12 communicates with the air inlet 301 of one air combing channel. In this way, the air inlet 301 of each air combing channel communicates with a part of the outlets of the corresponding gas channel 12. When the gas flows upward from the gas channel 12 to the air inlet 301 of the corresponding air combing channel, the flow direction is changed by the guiding of the guiding surface 31 and the top surface 30 when flowing through the corresponding air combing channel, and the flow rate decreases. First, premixing is carried out in the air combing channel, and then it flows out from the air outlet 302 in the direction towards the horizontal direction and the central axis of the mixing chamber 11, and flows into and fills the mixing chamber 11.

[0046] In the second installation method, according to the installation requirements, the setting positions of the fitting part 21 and the positioning part 13 are adjusted. Or the positioning part 13 and the fitting part 21 are omitted, and a welding method or a high-temperature resistant adhesive bonding method is adopted to replace the clamping method of the positioning part 13 and the fitting part 21.

[0047] The third method: As Figure 3 shown, the blocking part 4 is arranged directly above the outlet of the gas channel 12, covers the middle part of the outlet of the gas channel 12 and defines a left outlet 121 and a right outlet 122. The left outlet 121 and the right outlet 122 are respectively communicated with the air inlets 301 of two adjacent air combing channels. In this way, the air inlets 301 of two adjacent air combing channels are respectively communicated with the left outlet 121 and the right outlet 122 of the same gas channel 12. When the gas flows upward from the gas channel 12 to the blocking part 4, its flow direction is bent and divided into two left airflows. One airflow flows into the air inlet 301 of the corresponding air combing channel from the left outlet 121, and the other airflow flows through the air inlet 301 of another corresponding air combing channel from the right outlet 122.

[0048] For the third installation method, the convex part 3 straddles the outlets of two adjacent gas channels 12, and the length of the air combing channel is slightly less than the length of the convex part 3. The lengths of the air inlet 301 and the air outlet 302 are both equal to the length of the air combing channel. Therefore, the left and right sides of the air inlet 301 of the same air combing channel are respectively communicated with partial air outlets of two adjacent gas channels 12. Specifically, the gas channel 12 includes a first gas channel and a second gas channel. The left outlet 121 of the first gas channel and the right outlet 122 of the second gas channel are respectively the air inlet 301 of the same air combing channel. In this way, when the gas flows into the air combing channel from the left and right sides of the air inlet 301, gas convection is formed, making the gas mixture more uniform, and then flowing out from the air outlet 302 in the direction towards the horizontal direction and the central axis of the mixing cavity 11, flowing into and filling the mixing cavity 11.

[0049] Embodiment 2

[0050] As Figures 6 - 7As shown, the difference between this embodiment and Embodiment 1 lies in the different structure of the convex portion 3. Specifically, the convex portion 3 includes a guiding surface 31 facing the air outlet 302, a left side surface 32, and a right side surface 33. One side of the guiding surface 31 is connected to the flat plate portion of the annular baffle, and is abutted or connected to the outer ring wall 112 of the mixing chamber 11 through the outer side of the annular baffle. The other side of the blocking portion 4 extends obliquely upward and leaves a gap with the inner ring wall 111 of the mixing chamber 11 for the gas to pass through. The left and right sides of the guiding surface 31 are respectively connected to the left side surface 32 and the right side surface 33, and the lower sides of the left side surface 32 and the right side surface 33 are connected to the flat plate portion of the annular baffle. In this way, the guiding surface 31, the left side surface 32, and the right side surface 33 enclose a gas passage 12 with a downward opening and an opening towards the central axis of the mixing chamber 11. The air inlet 301 is formed by a downward opening, and the air outlet 302 is formed by an opening towards the central axis of the mixing chamber 11.

[0051] Preferably, the guiding surface 31 is an inclined surface arranged obliquely in the horizontal plane, so as to better guide the gas to flow upward to the air outlet 302, and make the gas flow out tangentially from the air outlet 302 towards the central axis of the mixing chamber 11. In other embodiments, the guiding surface 31 can be an arc surface.

[0052] It can be seen that by setting the guiding surface 31 as an inclined surface and omitting the top surface as described in Embodiment 1, while ensuring that the gas combing channel of the convex portion 3 can comb the flow direction and flow rate of the gas flowing into the mixing chamber 11, the structure of the gas combing device 2 is made simpler.

[0053] Embodiment 3

[0054] As Figure 8 shown, the difference from Embodiment 1 lies in the different connection manner between the gas combing device 2 and the mixing chamber 11 in this embodiment. Specifically, an installation groove 14 is provided at a position corresponding to the outlet of the gas passage 12 on the inner side of the outer ring wall 112 of the mixing chamber 11. The annular baffle (i.e., the gas combing device 2) is provided with an outwardly extending installation portion 22 at a position corresponding to the installation groove 14. During installation, the installation portion 22 of the annular baffle is inserted into the installation groove 14, and the inner and outer sides of the annular baffle respectively abut against the inner ring wall 111 and the outer ring wall 112 of the mixing chamber 11. In other embodiments, the setting position of the installation groove 14 can be adjusted according to the matching degree between the air inlet 301 of each gas combing channel and the outlet of the corresponding gas combing channel.

[0055] It can be seen that through the cooperation and insertion of the installation portion 22 and the installation groove 14, the gas combing device 2 is stably and reliably installed in the mixing chamber 11, and it is ensured that the air inlet 301 is communicated with the outlet of the corresponding gas passage 12. At the same time, it can effectively prevent the convex portion 3 from shifting due to the impact of the airflow, and ensure that the air inlet 301 is always communicated with the outlet of the corresponding gas passage 12.

[0056] Embodiment 4

[0057] The difference between this embodiment and Embodiment 1, 2 or 3 is that the convex part 3 and the blocking part 4 are independent components of each other. When the air inlet 301 at the bottom of the convex part 3 communicates with all the outlets of the corresponding gas channel 12, the blocking part 4 can be omitted, and the flat parts on the inner and outer sides of the bottom of the convex part 3 are respectively abutted against the inner ring wall and the outer ring wall of the mixing chamber. When the air inlet 301 at the bottom of the convex part 3 communicates with some of the outlets of the corresponding gas channel 12, the blocking part 4 is installed above the outlet of the gas channel 12 and covers the remaining outlets. The connection between the blocking part 4 and the mixing chamber 11, and between the convex part 3 and the mixing chamber 11 can be realized by inserting and matching the installation part and the installation groove as described in Embodiment 3, or fixed by other means.

[0058] It can be seen that by designing the convex part 3 and the blocking part 4 as independent components of each other, when the air inlet 301 at the bottom of the convex part 3 communicates with all the outlets of the corresponding gas channel 12, the blocking part 4 can be omitted, saving manufacturing materials and reducing manufacturing costs.

[0059] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A burner burner head, comprising a burner head body (1), wherein the burner head body (1) is provided with a gas mixing chamber (11) with an upward opening and at least two gas channels (12). Characterized in that, It further includes a gas combing device (2), the gas combing device (2) includes at least two convex portions (3), the convex portions (3) are arranged in the gas mixing chamber (11) and above the outlet of the gas channel (12), and the convex portions (3) are provided with a gas combing channel for changing the gas flow direction, and an air inlet (301) and an air outlet (302) respectively communicating with the gas combing channel. The air inlet (301) communicates with at least part of the outlet of the gas channel (12), the air outlet (302) is arranged towards the central axis of the gas mixing chamber (11) and is used for discharging the gas in a horizontal direction, and the gas mixing chamber (11) communicates with the air outlet (302). The gas combing device (2) further includes a blocking portion (4) arranged between two adjacent convex portions (3). The left and right ends of the blocking portion (4) are respectively connected to the convex portions (3). The blocking portion (4) covers the middle part of the outlet of the gas channel (12) and defines a left outlet (121) and a right outlet (122). The left outlet (121) and the right outlet (122) respectively communicate with the air inlets (301) of two adjacent gas combing channels. Wherein, the gas combing device (2) is an annular baffle installed in the gas mixing chamber (11). The outer side and the inner side of the annular baffle respectively abut against or are connected to the outer ring wall (112) and the inner ring wall (111) of the gas mixing chamber (11), and the bottom of the annular baffle abuts against the bottom of the gas mixing chamber (11) or has a gap. A plurality of convex portions (3) equal in number to the gas channels (12) are arranged at intervals on the annular baffle. The blocking portion (4) is composed of a flat plate portion of the annular baffle between two adjacent convex portions (3).

2. A burner burner head according to claim 1, Characterized in that, The gas combing channel includes a guiding surface (31) facing the air outlet (302). One side of the guiding surface (31) abuts against or is connected to the outer ring wall (112) of the gas mixing chamber (11), and the other side extends obliquely upward and has a gap with the inner ring wall (111) of the gas mixing chamber (11).

3. A burner burner head according to claim 2, Characterized in that, The gas combing channel further includes a top surface (30). The top surface (30) is a horizontally arranged plane or an inclined plane inclined in the vertical direction. One side of the top surface (30) is connected to the guiding surface (31), and the other side has a gap with the inner ring wall (111) of the gas mixing chamber (11).

4. A burner burner head according to claim 2 or 3, Characterized in that, The top of the convex portion (3) is lower than the upper end surface of the gas mixing chamber (11), and the height of the convex portion (3) is 3 mm to 8 mm. The guiding surface (31) is an inclined surface or a curved surface.

5. A burner burner head according to claim 1, It is characterized in that the length of the air inlet (301) is greater than the length of the outlet of the gas passage (12), and the outlet of the gas passage (12) communicates with the air inlet (301) of the air combing passage.

6. A burner burner head according to claim 5 It is characterized in that the length of the air combing passage is less than or equal to the arc length between the center lines of the outlets of two adjacent gas passages (12), and the length of the air outlet (302) is equal to the length of the air combing passage.

7. A burner burner head according to claim 1 It is characterized in that the gas passage (12) includes a first gas passage and a second gas passage, and the left outlet (121) of the first gas passage and the right outlet (122) of the second gas passage are respectively communicated with the same air combing passage through the air inlet (301).

8. A burner burner head according to claim 1 It is characterized in that the raised portion (3) is integrally formed by stamping and stretching outward locally from the annular baffle, and the inner side of the raised portion (3) is cut and separated from the annular baffle to form the air outlet (302), and an opening constituting the air inlet (301) is formed at the bottom of the raised portion (3).

Images