Premix gas burners and gas stoves

Abstract

The utility model discloses a premixed gas burner head and a gas stove. The premixed gas burner head comprises a burner body, a fire cover and a furnace. An ignition assembly is arranged in the middle of the burner body. The burner body is provided with an annular air cavity opening upward on the periphery of the ignition assembly. The burner body is provided with an air inlet channel connected with the annular air cavity. The fire cover is annular and arranged on the upper side of the burner body, which can cover the opening of the annular air cavity. The fire cover is provided with a plurality of air outlet grooves connected with the annular air cavity. The furnace has a combustion cavity opening on the upper side. The furnace and the burner body are an integrated casting structure. The utility model has a simple and reasonable structure. No additional connection is required between the furnace and the burner body, which is conducive to reducing the workload of installation and the number of required connectors, avoiding heat loss and reduced heating efficiency due to gaps at the connection, and is conducive to making the furnace and the burner cooperate to exert the best heating performance.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a premixed gas burner head and a gas stove. Background Art

[0002] Gas stoves can be divided into two types according to the usage scenarios: household and commercial. Commercial gas stoves usually use premixed gas burners. Premixed gas burners are different from conventional household burners in that they require gas and oxygen (or air) to be premixed into premixed gas before inputting it into the burner. In commercial gas stoves, in order to improve its energy-saving effect and heating performance, the burner of the burner is usually used in conjunction with the furnace. Conventional furnaces and burners are designed separately. When in use, the furnace and burner need to be installed separately, which increases the complexity and workload of installation. In addition, additional connectors are required to connect the two, and gaps are prone to appear at the connection, which may cause heat loss and reduce heating efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a premixed gas burner head, whose furnace and burner body are an integrated casting structure, which has a simple structure, is conducive to reducing the installation workload and the number of required connectors, and avoids heat loss and reduced heating efficiency due to gaps in the connection.

[0004] The utility model also provides a gas stove with the premixed gas burner head.

[0005] According to the premixed gas burner head described in the embodiment of the first aspect of the utility model, it includes a burner body, a fire cover and a furnace, an ignition assembly is provided in the middle of the burner body, and the burner body is provided with an annular air cavity opening upward on the outer periphery of the ignition assembly, the burner body is provided with an air inlet passage connected with the annular air cavity, the fire cover is annular and is arranged on the upper side of the burner body, and can cover the opening of the annular air cavity, the fire cover is provided with a plurality of air outlet grooves connected with the annular air cavity, the furnace has a combustion chamber opening on the upper side, and the furnace and the burner body are an integral casting structure.

[0006] According to the premixed gas burner described in the embodiment of the utility model, it has at least the following beneficial effects: when in use, the pot is placed on the furnace, the lower part of the pot enters the combustion chamber, the premixed gas is input into the annular gas chamber from the air inlet channel, and then output through the gas outlet groove on the fire cover and ignited by the ignition assembly, so that the premixed gas burns in the combustion chamber to heat the pot and achieve cooking and heating. Since the furnace and the burner body are an integrated casting structure, the structure is simple, and no additional connection is required between the furnace and the burner body, which is conducive to reducing the installation workload and the number of required connectors, avoiding heat loss and reduced heating efficiency due to gaps in the connection, and is conducive to the furnace and the burner to cooperate to achieve the best heating performance.

[0007] According to some embodiments of the utility model, a first wall portion is provided at the lower portion of the combustion chamber. The first wall portion is annular and the inner side of the ring is inclined downward and contracted. The lower portion of the first wall portion is arranged around the outer peripheral side of the fire cover.

[0008] According to some embodiments of the utility model, a second wall portion is provided at the upper portion of the combustion chamber. The second wall portion is annular and has a plurality of support bosses for abutting against the bottom of the cookware. The plurality of support bosses are distributed at intervals so that a ventilation groove is formed between two adjacent support bosses.

[0009] According to some embodiments of the present invention, the wall thickness of the first wall portion gradually decreases in a direction toward the second wall portion, and the wall thickness of the second wall portion gradually decreases in a direction toward the first wall portion.

[0010] According to some embodiments of the present invention, an annular third wall portion is provided on the lower side of the furnace, and the third wall portion is arranged around the outer periphery of the burner body and a dirt collecting groove is formed between the third wall portion and the outer periphery of the burner body.

[0011] According to some embodiments of the utility model, an inner circle air hole is defined between the inner side of the ring of the fire cover and the burner body, and the inner circle air hole is connected to the inner side of the ring of the annular air cavity. The inner side of the ring of the fire cover is provided with a guide arc surface corresponding to the gas outlet position of the inner circle air hole, and the guide arc surface can guide the premixed gas output by the inner circle air hole toward the direction of the gas outlet groove.

[0012] According to some embodiments of the utility model, an outer ring of air holes is defined between the outer ring side of the fire cover and the burner body, and the outer ring of air holes is connected to the outer ring side of the annular air cavity. An annular third wall portion is provided on the lower side of the furnace, and the third wall portion is arranged around the outer periphery of the burner body and corresponds to the gas outlet position of the outer ring of air holes. The third wall portion can guide the premixed gas output by the outer ring of air holes upward.

[0013] According to some embodiments of the utility model, an annular top wall is provided on the upper side of the fire cover, the air outlet groove is provided on the annular top wall and the two ends of the air outlet groove along the length direction extend respectively to the inner side and the outer side of the annular top wall, the annular top wall is curved and the inner side and the outer side of the annular top wall are both curved downward.

[0014] According to some embodiments of the utility model, convex ribs are provided on both sides of the air outlet groove along the width direction.

[0015] The gas stove according to the embodiment of the second aspect of the utility model comprises the premix gas burner according to the embodiment of the first aspect of the utility model.

[0016] The gas stove according to the embodiment of the utility model has at least the following beneficial effects: by adopting the above-mentioned premixed gas burner head, its structure is simple, and no additional connection is required between the furnace and the burner body, which is beneficial to reduce the installation workload and the number of required connecting parts, avoid heat loss and reduced heating efficiency due to gaps in the connection, and help the furnace and burner to cooperate to achieve the best heating performance.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a premixed gas burner according to an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of a premixed gas burner;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0022] Figure 4 for Figure 2 Schematic diagram of the enlarged portion B.

[0023] Reference numerals:

[0024] Annular air cavity 101, air inlet passage 102, combustion chamber 103, ventilation groove 104, sewage collecting groove 105, burner body 110, support step 111, furnace 120, first wall 121, second wall 122, third wall 123, support boss 124;

[0025] The gas outlet groove 201 , the inner circle gas holes 202 , the outer circle gas holes 203 , the guide arc surface 204 , the fire cover 210 , the annular top wall 211 , the supporting feet 212 , the ribs 213 , and the ignition assembly 220 . DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that if it involves orientation descriptions, the orientations or positional relationships indicated, such as up, down, front, back, left, right, etc., are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, if the words "some", "greater than", "less than", "exceed", "over", "under", "within" etc. appear, among which "some" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number, and "over", "under", "within" etc. are understood to include the number.

[0029] If the first and second are described, they are only used to distinguish the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4A premixed gas burner head comprises a burner body 110, a fire cover 210 and a furnace 120. An ignition assembly 220 is provided in the middle of the burner body 110. The burner body 110 is provided with an annular air cavity 101 opening upward on the outer periphery of the ignition assembly 220. The burner body 110 is provided with an air inlet passage 102 communicating with the annular air cavity 101. The fire cover 210 is annular and arranged on the upper side of the burner body 110, capable of covering the opening of the annular air cavity 101. The fire cover 210 is provided with a plurality of air outlet grooves 201 communicating with the annular air cavity 101. The furnace 120 has a combustion cavity 103 opening on the upper side. The furnace 120 and the burner body 110 are an integral casting structure.

[0032] It is understandable that if Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the ignition assembly 220 may be an ignition needle or a long-open flame assembly, which is arranged in the middle of the burner body 110, and the outer periphery is an annular air cavity 101 with an opening upward, the fire cover 210 is annular and arranged on the upper side of the burner body 110 to cover the upper opening of the annular air cavity 101, and a plurality of gas outlet grooves 201 are provided, and the plurality of gas outlet grooves 201 are evenly spaced and distributed along the circumference of the fire cover 210 to form a radial shape, and the upper part of the fire cover 210 is a combustion cavity 103. When in use, the upper edge of the furnace 120 overlaps the stove, and the pot is placed on the furnace 120, and the lower part of the pot enters the combustion cavity 103, and the premixed gas is input from the air inlet channel 102 to the annular air cavity 101, and then output through the gas outlet groove 201 on the fire cover 210 and ignited by the ignition assembly 220, so that the premixed gas burns in the combustion cavity 103 to heat the pot, and achieve cooking and heating. Since the furnace 120 and the burner body 110 are an integral casting structure with a simple structure, no additional connection is required between the furnace 120 and the burner body 110, which helps to reduce the installation workload and the number of required connectors, avoid heat loss and reduced heating efficiency due to gaps in the joints, and help the furnace 120 and the burner to work together to achieve optimal heating performance.

[0033] In actual application, the specific structures of the burner body 110, the fire cover 210 and the furnace 120 can be set accordingly according to actual use needs, and will not be described in detail here, but will be explained in detail below.

[0034] In some embodiments, a first wall portion 121 is disposed at the lower portion of the combustion chamber 103 . The first wall portion 121 is annular and the inner side of the ring is inclined downward and contracted. The lower portion of the first wall portion 121 is disposed around the outer peripheral side of the fire cover 210 .

[0035] It is understandable that if Figure 1 and Figure 2As shown, the furnace 120 is provided with an annular first wall portion 121 at the lower part of the combustion chamber 103, the inner side of the ring of the first wall portion 121 is tilted downward and contracted to be roughly in the shape of an inverted truncated cone, and the lower part of the first wall portion 121 is arranged around the outer peripheral side of the fire cover 210, so as to better gather the flame at the bottom of the pot and improve the heating performance. In actual application, the specific inclination angle of the first wall portion 121 can be set accordingly according to the actual use situation.

[0036] In some embodiments, a second wall portion 122 is provided at the upper portion of the combustion chamber 103. The second wall portion 122 is annular and has a plurality of support bosses 124 for abutting against the bottom of the cookware. The plurality of support bosses 124 are distributed at intervals so that a ventilation groove 104 is formed between two adjacent support bosses 124.

[0037] It is understandable that if Figure 1 and Figure 2 As shown, the second wall portion 122 is butted against the upper portion of the first wall portion 121, the second wall portion 122 is annular and is provided with a plurality of support bosses 124, the plurality of support bosses 124 are spaced and distributed along the inner side of the ring of the second wall portion 122, and a ventilation groove 104 is formed between two adjacent support bosses 124. When in use, the pot is placed on the furnace 120, and the plurality of support bosses 124 abut against the bottom of the pot to support the pot, and the external air can enter the combustion chamber 103 through the ventilation groove 104, and the exhaust gas generated by the combustion can also be discharged through the ventilation groove 104, which is conducive to reducing the accumulation of exhaust gas in the combustion chamber 103 and facilitating the combustion and heating. In actual application, the specific structure, number of settings, and distribution position of the support bosses 124 can be set accordingly according to actual use needs.

[0038] In some embodiments, the wall thickness of the first wall portion 121 gradually decreases in a direction toward the second wall portion 122 , and the wall thickness of the second wall portion 122 gradually decreases in a direction toward the first wall portion 121 .

[0039] It is understandable that if Figure 2As shown, the wall thickness of the first wall portion 121 gradually decreases from bottom to top, and the wall thickness of the second wall portion 122 gradually decreases from top to bottom, so that the wall thickness of the first wall portion 121 and the second wall portion 122 changes from thick to thin and then to thick. The upper wall thickness of the second wall portion 122 is thicker, which is beneficial to ensure its structural strength, reduce the possibility of deformation caused by the gravity of the cookware, and achieve better support; while the lower part of the first wall portion 121 is thicker, on the one hand, to increase its structural strength and reduce the possibility of deformation caused by the gravity of the burner body 110, on the other hand, due to the oil Impurities such as water or some ingredients will fall into the combustion chamber 103 and accumulate in the lower part of the combustion chamber 103. After a long time, the lower part of the first wall portion 121 will be corroded. Therefore, the lower part of the first wall portion 121 is set to be thicker, which is beneficial to improve its rust resistance and reduce the possibility of damage caused by rust; the wall thickness between the first wall portion 121 and the second wall portion 122 is thinner, which is beneficial to the cooling of the furnace 120 when cooking and heating are stopped. After the burner is turned off, the temperature of the furnace 120 can be reduced quickly to avoid maintaining high temperature for a long time and causing the ambient temperature of the kitchen to increase, which is convenient for use.

[0040] In actual application, the specific wall thickness variation of the first wall portion 121 and the second wall portion 122 can be set accordingly according to actual use requirements.

[0041] In some embodiments, an annular third wall portion 123 is disposed at the lower side of the furnace 120 . The third wall portion 123 is disposed around the outer circumference of the burner body 110 and a dirt collecting tank 105 is formed between the third wall portion 123 and the outer circumference of the burner body 110 .

[0042] It is understandable that if Figure 1 , Figure 2 and Figure 3 As shown, the third wall portion 123 is disposed around the outer periphery of the burner body 110 and is spaced from the outer periphery of the burner body 110 to form a dirt collecting groove 105, so that foreign matter falling from the edge of the furnace 120 into the combustion chamber 103 can be collected in the dirt collecting groove 105, reducing the possibility of blocking the gas outlet groove 201, and facilitating use. In actual application, the specific shape and width of the dirt collecting groove 105 can be set accordingly according to actual use needs.

[0043] In some embodiments, an inner circle air hole 202 is defined between the inner side of the ring of the fire cover 210 and the burner body 110, and the inner circle air hole 202 is connected to the inner side of the ring of the annular air cavity 101. A guide arc surface 204 is provided on the inner side of the ring of the fire cover 210 corresponding to the gas outlet position of the inner circle air hole 202. The guide arc surface 204 can guide the premixed gas output from the inner circle air hole 202 toward the direction of the gas outlet groove 201.

[0044] It is understandable that if Figure 2 and Figure 3As shown, a gap is provided between the inner side of the ring of the fire cover 210 and the wall portion of the inner side of the ring of the annular air cavity 101 to form an annular inner ring air hole 202, and the inner ring air hole 202 is connected to the inner side of the ring of the annular air cavity 101 to increase the gas outlet area on the inner side of the burner, increase the combustion heating area, and improve the heating power; the gas outlet direction of the inner ring air hole 202 is upward, the guide arc surface 204 is provided above the gas outlet position of the inner ring air hole 202, and the gas outlet groove 201 extends to a position close to the guide arc surface 204. When the inner ring air hole 202 outputs the premixed gas, the premixed gas is discharged through the inner ring air hole 202. Due to the wall attachment effect, the premixed gas outputted from the inner circle air hole 202 will flow along the guide arc surface 204, thereby being guided toward the direction of the gas outlet slot 201, so as to avoid it being too close to the center, resulting in a smaller diameter of the ring-shaped flame at the inner circle air hole 202, which is conducive to ensuring a larger combustion and heating area; moreover, such a design forms a certain shielding above the gas outlet position of the inner circle air hole 202, reducing the possibility of foreign matter entering the annular air cavity 101 from the inner circle air hole 202, and reducing the possibility of foreign matter blocking the inner circle air hole 202, which is convenient for use. In actual application, the specific structure of the guide arc surface 204 can be set accordingly according to actual use needs.

[0045] In some embodiments, an outer ring of air holes 203 are defined between the outer ring of the fire cover 210 and the burner body 110. The outer ring of air holes 203 are connected to the outer ring of the annular air cavity 101. An annular third wall portion 123 is provided on the lower side of the furnace 120. The third wall portion 123 is arranged around the outer periphery of the burner body 110 and corresponds to the gas outlet position of the outer ring of air holes 203. The third wall portion 123 can guide the premixed gas output from the outer ring of air holes 203 upward.

[0046] It is understandable that if Figure 2 and Figure 3 As shown, a gap is provided between the inner ring side of the fire cover 210 and the outer ring side wall of the annular air cavity 101 to form an annular outer ring air hole 203, and the outer ring air hole 203 is connected to the outer ring side of the annular air cavity 101 to increase the gas outlet area outside the burner, increase the combustion heating area, and improve the heating power; the gas outlet direction of the outer ring air hole 203 is toward the third wall portion 123, and the third wall portion 123 is annular and extends in the up-down direction. The premixed gas output by the outer ring air hole 203 will be blocked by the third wall portion 123 and output upward along the third wall portion 123, so as to facilitate the flame of the gas outlet groove 201 to ignite it, and avoid excessive dissipation of the premixed gas output by the outer ring air hole 203. In actual application, the specific structure of the third wall portion 123 can be set accordingly according to actual use needs.

[0047] Further, refer to Figure 2 and Figure 3The lower end of the fire cover 210 is provided with a support foot 212, and the burner body 110 is provided with a support step 111 on the outer side of the annular cavity 101. The fire cover 210 is matched with the support foot 212 and the support step 111, so that the inner circle air hole 202 and the outer circle air hole 203 are formed correspondingly between the inner side and the outer side of the ring of the burner body 110, and the structure is simple and easy to use. In actual application, the inner circle air hole 202 and the outer circle air hole 203 can also be not provided, or only the inner circle air hole 202 is provided, or only the outer circle air hole 203 is provided, which can be set accordingly according to actual use needs.

[0048] In some embodiments, an annular top wall 211 is provided on the upper side of the fire cover 210, and the air outlet groove 201 is provided on the annular top wall 211, and the two ends of the air outlet groove 201 along the length direction extend respectively to the inner side and the outer side of the annular top wall 211, and the annular top wall 211 is curved and the inner side and the outer side of the annular top wall 211 are both curved downward.

[0049] It is understandable that if Figure 2 , Figure 3 and Figure 4 As shown, the gas outlet groove 201 is arranged on the annular top wall 211, and its two ends along the length direction extend to the inner side and the outer side of the annular top wall 211 respectively. The cross-sectional shape of the annular top wall 211 is a curved structure, and its inner side and the outer side of the annular ring are both curved upward. On the one hand, the premixed gas output by the gas outlet groove 201 diffuses outward in a fan shape in the longitudinal cross section, and the radiation area of ​​the combustion flame is fan-shaped, and the heating area is large, which is conducive to improving the heating power. On the other hand, such a design makes it easy for the premixed gas output by the gas outlet groove 201 on the inner side of the fire cover 210 to intersect with the premixed gas output by the inner circle gas hole 202, and the premixed gas output by the gas outlet groove 201 on the outer side of the fire cover 210 to intersect with the premixed gas output by the outer circle gas hole 203, which facilitates the ignition of the premixed gas therebetween and is convenient for use. In actual application, the specific bending condition of the annular top wall 211 can be set accordingly according to actual use needs.

[0050] In some embodiments, ribs 213 are provided on both sides of the air outlet groove 201 along the width direction. Figure 1 , Figure 3 and Figure 4 As shown, each air outlet groove 201 is provided with convex ribs 213 on both sides along the width direction. The convex ribs 213 are raised relative to the surface of the annular top wall 211 to help reduce the possibility of foreign matter entering the annular air cavity 101 through the air outlet groove 201, which is convenient for use.

[0051] Further, refer to Figure 4The upper part of the rib portion 213 is provided with a circular chamfer on one side away from the air outlet groove 201, and foreign matter falling on the rib portion 213 can slide along the circular chamfer to the annular top wall 211, further reducing the possibility of foreign matter entering the annular air cavity 101 from the air outlet groove 201, which is convenient for use. In actual application, the specific structure of the rib portion 213 can be set accordingly according to actual use needs.

[0052] The gas stove according to the second embodiment of the utility model comprises the premix gas burner according to the first embodiment of the utility model.

[0053] The gas stove according to the embodiment of the utility model adopts the above-mentioned premixed gas burner head, which has a simple structure and does not require additional connection between the furnace 120 and the burner body 110, which is beneficial to reducing the installation workload and the number of required connectors, avoiding heat loss and reduced heating efficiency due to gaps in the connection, and is beneficial to the furnace 120 and the burner to cooperate to achieve the best heating performance.

[0054] Since other components of the gas stove according to the embodiment of the utility model are known to those skilled in the art, they will not be described in detail here.

[0055] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A premixed gas burner, characterized in that: include: A burner body, wherein an ignition assembly is provided in the middle of the burner body, an annular air cavity opening upward is provided on the outer periphery of the ignition assembly, and an air inlet passage communicating with the annular air cavity is provided on the burner body; A fire cover, which is annular and arranged on the upper side of the burner body, capable of covering the opening of the annular air cavity, and is provided with a plurality of air outlet grooves communicating with the annular air cavity; The furnace has a combustion chamber with an upper opening, and the furnace and the burner body are an integral casting structure.

2. The premixed gas burner according to claim 1, characterized in that: A first wall portion is disposed at the lower portion of the combustion chamber. The first wall portion is annular and the inner side of the ring is tilted downward and contracted. The lower portion of the first wall portion is disposed around the outer peripheral side of the fire cover.

3. The premixed gas burner according to claim 2, characterized in that: A second wall portion is provided at the upper portion of the combustion chamber. The second wall portion is annular and is provided with a plurality of supporting bosses for abutting against the bottom of the cookware. The plurality of supporting bosses are distributed at intervals so that a ventilation groove is formed between two adjacent supporting bosses.

4. The premixed gas burner according to claim 3, characterized in that: The wall thickness of the first wall portion gradually decreases along a direction toward the second wall portion, and the wall thickness of the second wall portion gradually decreases along a direction toward the first wall portion.

5. The premixed gas burner according to claim 1, characterized in that: An annular third wall portion is provided at the lower side of the furnace, and the third wall portion is arranged around the outer periphery of the burner body and a dirt collecting groove is formed between the third wall portion and the outer periphery of the burner body.

6. The premixed gas burner according to claim 1, characterized in that: An inner circle air hole is defined between the inner side of the ring of the fire cover and the burner body, and the inner circle air hole is connected to the inner side of the ring of the annular air cavity. A guiding arc surface is provided on the inner side of the ring of the fire cover corresponding to the gas outlet position of the inner circle air hole, and the guiding arc surface can guide the premixed gas output by the inner circle air hole toward the direction of the gas outlet groove.

7. The premixed gas burner according to claim 1, characterized in that: An outer ring of air holes is defined between the outer ring side of the fire cover and the burner body, and the outer ring of air holes is connected to the outer ring side of the annular air cavity. An annular third wall portion is provided on the lower side of the furnace, and the third wall portion is arranged around the outer periphery of the burner body and corresponds to the gas outlet position of the outer ring of air holes. The third wall portion can guide the premixed gas output by the outer ring of air holes upward.

8. The premixed gas burner according to claim 1, characterized in that: An annular top wall is provided on the upper side of the fire cover, the air outlet groove is provided on the annular top wall and the two ends of the air outlet groove along the length direction extend respectively to the inner side and the outer side of the annular top wall, the annular top wall is curved and the inner side and the outer side of the annular top wall are both curved downward.

9. The premixed gas burner according to claim 1, characterized in that: The air outlet groove is provided with convex ribs on both sides along the width direction.

10. A gas stove, characterized in that: It comprises a premix gas burner according to any one of claims 1 to 9.

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