Premix gas burner and gas hob

Abstract

The utility model discloses a kind of premixing gas stove head and gas cooking utensils, premixing gas stove head includes combustor main body, fire cover and air inlet pipe, combustor main body is equipped with annular gas cavity of upside opening, fire cover is located at the upside of combustor main body, air inlet pipe is connected in combustor main body and is equipped with with annular gas cavity intercommunication air inlet passage, air inlet pipe is equipped with first pipe part and second pipe part, first pipe part is equipped with for input fuel first passage, second pipe part is equipped with for input air or oxygen second passage, first passage and second passage are all intercommunication in air inlet passage, first pipe part and second pipe part one of two is located in the end of air inlet pipe, another is correspondingly located in the side of air inlet pipe, the bottom wall of annular gas cavity is equipped with the guide groove of spiral structure, the end of guide groove is butt joint with air inlet passage. The utility model can make fuel and air (or oxygen) meet in air inlet passage and mix and spiral input to annular gas cavity along guide groove, realize better premixing effect.

Description

Technical Field

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

[0002] Existing premixed gas burners are mainly used for commercial purposes. Unlike conventional household burners, premixed gas burners require fuel and air (or oxygen) to be fed into the burner's intake channel in a specific ratio during the intake process. This allows the fuel and air (or oxygen) to be premixed into a premixed gas before combustion. The intake structure of existing premixed gas burners is relatively simple. Some burners simply feed fuel and air (or oxygen) together into the intake channel, resulting in poor premixing and causing the fuel and air (or oxygen) in the premixed gas to be burned before full mixing, affecting the burner's heating performance. Other burners allow the fuel and air (or oxygen) to meet at a predetermined angle in the intake channel, causing them to collide and mix. While this improves the premixing effect, the improvement is limited. Therefore, the structure of premixed gas burners still needs improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a premixed gas burner head, which enables the input fuel and air (or oxygen) to mix in the air intake channel, and allows the premixed gas in the air intake channel to be spirally input into the annular gas chamber along the guide groove. The premixed gas is fully mixed during the spiral motion, achieving a better premixing effect.

[0004] This utility model also proposes a gas stove with the premixed gas burner head.

[0005] According to a first aspect embodiment of the present invention, a premixed gas burner head includes a burner body, a flame cap, and an air inlet pipe. The burner body has an annular gas chamber with an upper opening. The flame cap is located on the upper side of the burner body and is positioned corresponding to the opening of the annular gas chamber. The air inlet pipe is connected to the burner body and has an air inlet channel communicating with the annular gas chamber. The air inlet pipe has a first pipe section and a second pipe section. The first pipe section has a first channel for inputting fuel, and the second pipe section has a second channel for inputting air or oxygen. Both the first channel and the second channel are connected to the air inlet channel. One of the first pipe section and the second pipe section is located at the end of the air inlet pipe, and the other is located on the side of the air inlet pipe. The bottom wall of the annular gas chamber has a guide groove with a spiral structure, and the end of the guide groove is connected to the air inlet channel.

[0006] According to the embodiments of this utility model, the premixed gas burner head has at least the following beneficial effects: In use, fuel is input into the first channel and air or oxygen is input into the second channel. Since one of the first and second pipes is located at the end of the air inlet pipe and the other is located on the side of the air inlet pipe, the airflow directions of the first and second channels into the air inlet channel will form a preset angle, which is conducive to the gas output from the first and second channels converging and mixing in the air inlet channel, so that the input fuel and air (or oxygen) are initially mixed in the air inlet channel. Subsequently, the premixed gas is transported from the air inlet channel to the annular gas chamber. Since there is a spiral guide groove between the air inlet channel and the annular gas chamber, the premixed gas in the air inlet channel will be spirally input into the annular gas chamber along the guide groove under the guidance of the guide groove. The premixed gas is mixed again during the spiral movement, thereby achieving a better premixing effect, which is conducive to ensuring that the burner can obtain better heating performance.

[0007] According to some embodiments of the present invention, the first tube is disposed at the end of the air intake pipe, and the second tube is disposed on the side of the air intake pipe.

[0008] According to some embodiments of the present invention, a first connecting port is provided between the first channel and the air intake channel and is connected through the first connecting port; a second connecting port is provided between the second channel and the air intake channel and is connected through the second connecting port; the first connecting port is offset relative to the axis of the air intake channel; the second connecting port is offset relative to the axis of the air intake channel, so that the gas output from the first connecting port and the gas output from the second connecting port can converge and mix in the air intake channel and form a spiral airflow.

[0009] According to some embodiments of the present invention, the inner wall cross-section of the air intake channel is circular, the air intake pipe has a reference surface tangent to the wall of the air intake channel and parallel to the axis of the second channel, and the edge of the second connecting port is tangent to or coplanar with the reference surface.

[0010] According to some embodiments of the present invention, the air intake pipe is detachably connected to the burner body.

[0011] According to some embodiments of the present invention, the cross-section of the guide groove wall is an arc-shaped structure.

[0012] According to some embodiments of the present invention, the flame cap has an annular structure, with an inner stepped portion on the inner side of the ring and at least one outer stepped portion on the outer side of the ring. The inner stepped portion has a first flame hole communicating with the annular gas chamber, and multiple first flame holes are provided and distributed at intervals around the center of the flame cap. The outer stepped portion has a second flame hole communicating with the annular gas chamber, and multiple second flame holes are provided and distributed at intervals around the center of the flame cap.

[0013] According to some embodiments of the present invention, a shielding part for preventing foreign objects from entering is provided above the air outlet of the first fire hole and / or the second fire hole.

[0014] According to some embodiments of the present invention, the flame cap is provided with a group of flame holes, and the flame hole group is provided in multiple groups and is distributed at intervals around the center of the flame cap. Each group of flame holes includes multiple ignition holes that communicate with the annular gas cavity. The multiple ignition holes in the same group of flame holes are distributed at intervals along the direction from the inner side of the flame cap ring to the outer side of the ring.

[0015] The gas stove according to the second aspect of the present invention includes a premixed gas burner according to the first aspect of the present invention.

[0016] According to the embodiments of this utility model, the gas stove has at least the following beneficial effects: by adopting the above-mentioned premixed gas burner, fuel and air (or oxygen) can be mixed in the air intake channel and spirally input into the annular gas chamber along the guide groove, which can achieve a better premixing effect, which is conducive to the output combustion of premixed gas after full mixing, and can obtain better heating performance.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

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

[0020] Figure 2 for Figure 1 A structural schematic diagram of a premixed gas burner from another perspective;

[0021] Figure 3 for Figure 1 One of the schematic diagrams of the cross-sectional structure of a premixed gas burner head;

[0022] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of a premixed gas burner head (Part 2);

[0023] Figure 5 for Figure 1 A schematic diagram of a partial structural cross-section of the premixed gas burner head at the gas inlet pipe.

[0024] Figure label:

[0025] Burner body 100, annular gas chamber 101, guide groove 102;

[0026] Flame cap 200, first flame hole 201, second flame hole 202, ignition hole 203, inner stepped part 210, outer stepped part 220, shielding part 221;

[0027] Air intake pipe 300, air intake channel 301, first channel 302, second channel 303, first connecting port 304, second connecting port 305, first pipe section 310, second pipe section 320. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this utility model and simplifying the description, and does 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, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this utility model, if words such as several, greater than, less than, exceeding, above, below, or within appear, several means one or more, multiple means two or more, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, or within are understood to include the number itself.

[0031] If the terms "first" and "second" are used only to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A premixed gas burner head includes a burner body 100, a flame cap 200, and an air inlet pipe 300. The burner body 100 has an annular gas chamber 101 with an upper opening. The flame cap 200 is located on the upper side of the burner body 100 and is positioned corresponding to the opening of the annular gas chamber 101. The air inlet pipe 300 is connected to the burner body 100 and has an air inlet channel 301 communicating with the annular gas chamber 101. The air inlet pipe 300 has a first pipe section 310 and a second pipe section 320. The first pipe section 310 has... There is a first channel 302 for inputting fuel, and a second pipe 320 is provided with a second channel 303 for inputting air or oxygen. Both the first channel 302 and the second channel 303 are connected to the air intake channel 301. One of the first pipe 310 and the second pipe 320 is located at the end of the air intake pipe 300, and the other is located on the side of the air intake pipe 300. The bottom wall of the annular air chamber 101 is provided with a guide groove 102 with a spiral structure, and the end of the guide groove 102 is connected to the air intake channel 301.

[0034] Understandably, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the intake pipe 300 is connected to the side of the burner body 100 and extends in the front-rear direction. It has an intake channel 301 inside. The first pipe section 310 and the second pipe section 320 are both located in the front half of the intake pipe 300. The lower part of the burner body 100 has a spiral guide groove 102, and the outlet end of the intake channel 301 is connected to the end of the guide groove 102. In use, fuel is input into the first channel 302, and air or oxygen is input into the second channel 303. Since one of the first pipe section 310 and the second pipe section 320 is located at the end of the intake pipe 300, and the other is located on the side of the intake pipe 300, the airflow directions from the first channel 302 and the second channel 303 to the intake channel 301 will form a preset angle. This facilitates the mixing of the gases output from the first channel 302 and the second channel 303 in the intake channel 301, allowing the input fuel and air (…) to mix. (Or oxygen) is initially mixed in the intake channel 301. Then, the premixed gas is transported from the intake channel 301 to the annular gas chamber 101. Since there is a spiral guide groove 102 between the intake channel 301 and the annular gas chamber 101, the premixed gas in the intake channel 301 will be spirally input into the annular gas chamber 101 along the guide groove 102 under the guidance of the guide groove 102. The premixed gas is mixed again during the spiral motion, thereby achieving a better premixing effect, which is conducive to ensuring that the burner can obtain better heating performance.

[0035] In practical applications, the specific structure of the burner body 100 and the flame cap 200 can be set according to the actual needs of use. It will not be described in detail here, but will be explained in detail below.

[0036] In some embodiments, a first pipe portion 310 is provided at the end of the air intake pipe 300, and a second pipe portion 320 is correspondingly provided on the side of the air intake pipe 300.

[0037] Understandably, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the first pipe section 310 is located at the front end of the intake pipe 300, and the second pipe section 320 is correspondingly located on the right side of the intake pipe 300. The projections of the axes of the first channel 302 and the second channel 303 onto the horizontal plane form a preset right angle, which is beneficial for fuel and air (or oxygen) to mix in the intake channel 301, achieving a better premixing effect. In practical applications, the first pipe section 310 can also be located on the side of the intake pipe 300, such as the left, right, or lower side of the intake pipe 300, etc., in which case the second pipe section 320 is correspondingly located at the end of the intake pipe 300. The specific location can be changed according to the actual needs of use.

[0038] In some embodiments, a first connecting port 304 is provided between the first channel 302 and the intake channel 301 and is connected through the first connecting port 304; a second connecting port 305 is provided between the second channel 303 and the intake channel 301 and is connected through the second connecting port 305. The first connecting port 304 is offset relative to the axis of the intake channel 301, and the second connecting port 305 is offset relative to the axis of the intake channel 301, so that the gas output from the first connecting port 304 and the gas output from the second connecting port 305 can converge and mix in the intake channel 301 to form a spiral airflow.

[0039] Understandably, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the first connecting port 304 is located on the front wall of the intake channel 301. The first channel 302 and the intake channel 301 are connected through the first connecting port 304. The first connecting port 304 is offset downward relative to the axis of the intake channel 301. The second connecting port 305 is located on the right wall of the intake channel 301. The second channel 303 and the intake channel 301 are connected through the second connecting port 305. The second connecting port 305 is offset downward relative to the axis of the intake channel 301, so that the fuel output from the first connecting port 304 will mix with the air (or oxygen) output from the second connecting port 305. Affected by the fuel-air flow, the mixed airflow formed by the fuel and air (or oxygen) will spiral in the intake channel 301, thereby further improving the premixing effect of fuel and air (or oxygen). In practical applications, the arrangement of the first channel 302 and the second channel 303 can be changed according to actual usage needs.

[0040] In some embodiments, the inner wall of the intake channel 301 is circular, the intake pipe 300 has a reference surface that is tangent to the wall of the intake channel 301 and parallel to the axis of the second channel 303, and the edge of the second connecting port 305 is tangent to or coplanar with the reference surface.

[0041] Understandably, such as Figure 4 and Figure 5 As shown, the inner wall cross-section of the intake passage 301 is circular. The reference surface (not shown in the figure) is tangent to the bottom wall of the intake passage 301 and parallel to the axis of the second passage 303. The edge of the second connecting port 305 is tangent to the reference surface. This allows the gas output from the second connecting port 305 to be better guided by the side wall of the intake passage 301, thus rotating along the side wall of the intake passage 301. This facilitates thorough mixing of fuel and air (or oxygen) in the intake passage 301, improving the premixing effect. In practical applications, the specific configuration of the second connecting port 305 can be varied according to actual usage requirements.

[0042] In some embodiments, the intake pipe 300 is detachably connected to the burner body 100. It is understood that the intake pipe 300 and the burner body 100 are detachably connected via a threaded structure. In use, different types of intake pipes 300 can be replaced as needed to meet different usage requirements. In practical applications, the intake pipe 300 and the burner body 100 can also be detachably connected via other structures, which can be set according to actual usage needs.

[0043] In some embodiments, the cross-section of the guide groove 102 is arc-shaped. It is understood that, as... Figure 3 As shown, the cross-section of the guide channel 102 is arc-shaped. Compared with a flat wall, the arc-shaped wall helps to reduce pressure loss of gas during transportation and is easier to use. In practical applications, the specific structure of the guide channel 102 can be set according to actual needs.

[0044] In some embodiments, the flame cap 200 has an annular structure. The inner side of the flame cap 200 is provided with an inner stepped portion 210, and the outer side of the flame cap 200 is provided with at least one outer stepped portion 220. The inner stepped portion 210 is provided with a first flame hole 201 that communicates with the annular air cavity 101. The first flame hole 201 is provided in multiples and is distributed at intervals around the center of the flame cap 200. The outer stepped portion 220 is provided with a second flame hole 202 that communicates with the annular air cavity 101. The second flame hole 202 is provided in multiples and is distributed at intervals around the center of the flame cap 200.

[0045] Understandably, such as Figure 1 , Figure 3 and Figure 4 As shown, the inner side of the burner cap 200 has an inner stepped portion 210, and the outer side of the burner cap 200 has two outer stepped portions 220 of different heights. Both the inner and outer stepped portions 210 are annular. The inner stepped portion 210 has multiple first flame holes 201, which are spaced apart around the center of the burner cap 200. The outer stepped portion 220 has multiple second flame holes 202, which are spaced apart around the center of the burner cap 200. This allows for gas output from both the inner and outer sides of the burner cap 200, achieving two rings of combustion flame. The structure is simple and easy to use. In practical applications, the specific structure of the inner stepped portion 210 and the outer stepped portion 220, as well as the number of first flame holes 201 and second flame holes 202, can be set according to actual usage needs.

[0046] In some embodiments, a shielding portion 221 for preventing foreign objects from entering is provided above the air outlet of the first flame hole 201 and / or the second flame hole 202.

[0047] Understandably, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a protruding shield 221, similar to an eave, is provided above the air outlet of the second flame hole 202 to block the outlet of the second flame hole 202 in the vertical direction, preventing foreign objects from entering the second flame hole 202 and preventing it from becoming clogged. In practical applications, a shield 221 can also be provided above the air outlet of the first flame hole 201, and the specific structure of the shield 221 can be set according to actual usage requirements.

[0048] In some embodiments, the flame cap 200 is provided with a group of flame holes, and multiple groups of flame holes are provided and distributed at intervals around the center of the flame cap 200. Each group of flame holes includes multiple ignition holes 203 that communicate with the annular gas chamber 101. Multiple ignition holes 203 in the same group of flame holes are distributed at intervals along the direction from the inner side of the flame cap 200 ring to the outer side of the ring.

[0049] Understandably, such as Figure 1 , Figure 3 and Figure 4 As shown, the flame hole group has four sets distributed at intervals around the center of the flame cap 200. Each set of flame holes includes three ignition holes 203. The three ignition holes 203 in the same set of flame holes are distributed at intervals along the direction from the inner side of the flame cap 200 ring to the outer side of the ring. This increases the combustion heating area on the upper side of the flame cap 200. On the other hand, the flame burning on the inner side of the flame cap 200 ring can spread to the outer side of the ring through the ignition holes 203, thereby igniting the gas output from the second flame hole 202 in the outer ring. Its structure is simple and easy to manufacture and use. In practical applications, the specific number of flame hole groups and ignition holes 203 can be set according to actual usage needs.

[0050] A gas stove according to a second aspect of the present invention includes a premixed gas burner according to the first aspect of the present invention.

[0051] According to the embodiments of the present invention, the gas stove, by adopting the premixed gas burner head described above, enables fuel and air (or oxygen) to mix in the air intake channel 301 and spirally input into the annular gas chamber 101 along the guide groove 102, which can achieve a better premixing effect, which is beneficial to output combustion after the premixed gas is fully mixed, and can obtain better heating performance.

[0052] Since the other components of the gas stove in this embodiment are known to those skilled in the art, they will not be described in detail here.

[0053] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A premixed gas burner head, characterized in that, include: The burner body has an annular gas chamber with an upper opening; The flame cap is located on the upper side of the burner body and is positioned corresponding to the opening of the annular gas chamber; An intake pipe is connected to the burner body and has an intake channel communicating with the annular air chamber. The intake pipe has a first pipe section and a second pipe section. The first pipe section has a first channel for inputting fuel, and the second pipe section has a second channel for inputting air or oxygen. Both the first channel and the second channel are connected to the intake channel. One of the first pipe section and the second pipe section is located at the end of the intake pipe, and the other is located on the side of the intake pipe. The bottom wall of the annular air chamber has a guide groove with a spiral structure, and the end of the guide groove is connected to the intake channel.

2. The premixed gas burner head according to claim 1, characterized in that, The first tube is located at the end of the air intake pipe, and the second tube is located on the side of the air intake pipe.

3. The premixed gas burner head according to claim 2, characterized in that, A first connecting port is provided between the first channel and the air intake channel and is connected through the first connecting port. A second connecting port is provided between the second channel and the air intake channel and is connected through the second connecting port. The first connecting port is offset relative to the axis of the air intake channel, and the second connecting port is offset relative to the axis of the air intake channel, so that the gas output from the first connecting port and the gas output from the second connecting port can converge and mix in the air intake channel to form a spiral airflow.

4. The premixed gas burner head according to claim 3, characterized in that, The inner wall of the air intake channel has a circular cross-section, and the air intake pipe has a reference surface that is tangent to the wall of the air intake channel and parallel to the axis of the second channel. The edge of the second connecting port is tangent to or coplanar with the reference surface.

5. The premixed gas burner head according to claim 1, characterized in that, The air intake pipe is detachably connected to the burner body.

6. The premixed gas burner head according to claim 1, characterized in that, The cross-section of the guide groove wall is arc-shaped.

7. The premixed gas burner head according to claim 1, characterized in that, The flame cap has a ring-shaped structure. The inner side of the flame cap is provided with an inner stepped portion, and the outer side of the flame cap is provided with at least one outer stepped portion. The inner stepped portion is provided with a first flame hole that communicates with the annular gas chamber. The first flame hole is provided in multiple locations and is distributed at intervals around the center of the flame cap. The outer stepped portion is provided with a second flame hole that communicates with the annular gas chamber. The second flame hole is provided in multiple locations and is distributed at intervals around the center of the flame cap.

8. The premixed gas burner head according to claim 7, characterized in that, A shielding part is provided above the air outlet of the first flame hole and / or the second flame hole to prevent foreign objects from entering.

9. The premixed gas burner head according to claim 7, characterized in that, The flame cap is provided with a group of flame holes, and the flame hole group is provided in multiple groups and is distributed at intervals around the center of the flame cap. Each group of flame holes includes multiple ignition holes that communicate with the annular gas chamber. The multiple ignition holes in the same group of flame holes are distributed at intervals along the direction from the inner side of the flame cap ring to the outer side of the ring.

10. A gas stove, characterized in that, Including the premixed gas burner head according to any one of claims 1 to 9.

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