CN109000245B

CN109000245B - Burner and gas cooker

Info

Publication number: CN109000245B
Application number: CN201811027492.8A
Authority: CN
Inventors: 林梦; 孙明雪
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-09-04
Filing date: 2018-09-04
Publication date: 2023-09-26
Anticipated expiration: 2038-09-04
Also published as: CN109000245A

Abstract

The invention discloses a combustor and a gas cooker. The burner comprises a bottom cup, a flame thrower arranged on the bottom cup and a nozzle seat. The bottom cup is provided with a primary air cavity. The top of the primary air cavity is provided with a first primary air opening, and the side wall is provided with a cavity through hole serving as a second primary air opening. The flame thrower comprises an outer ring cavity and an inner ring cavity. The bottom cup is provided with a first injection channel. The outer ring cavity is provided with an outer gas mixing cavity for supplying mixed gas through the first injection channel. The inner ring cavity is provided with an inner gas mixing cavity and is connected with a second injection channel, and mixed gas of the inner gas mixing cavity is supplied by the second injection channel. A gap for communicating the air inlet of the second injection channel is formed between the outer ring cavity and the bottom cup. A primary air channel communicated with the first primary air inlet is formed between the outer ring cavity and the primary air cavity. In the burner, the upper and lower air inlet of the outer ring cavity and the upper air inlet of the inner ring cavity can be realized, and the heat load of the burner is ensured.

Description

Burner and gas cooker

Technical Field

The invention relates to the technical field of cooking appliances, in particular to a combustor and a gas cooker.

Background

Currently, the burner of the gas cooker is more common to be a lower air inlet burner or an upper air inlet burner. Primary air from the lower intake burner is introduced from the bottom shell below the panel and the cabinet door opening and closing seriously affects the stability of the fire-holding flame. Primary air of the upper air inlet burner is introduced from the upper part of the panel, and is limited by the structure of the burner, so that the design of the venturi tube is shorter, the air and the fuel gas are easy to mix unevenly, and the heat load of the burner is difficult to ensure.

Disclosure of Invention

The invention provides a combustor and a gas cooker.

The burner comprises a bottom cup, a flame thrower and a nozzle seat, wherein the flame thrower is arranged on the bottom cup, the bottom cup is provided with a primary air cavity, the nozzle seat is arranged on the side wall of the primary air cavity, a first primary air inlet is formed in the top of the primary air cavity, and a cavity through hole serving as a second primary air inlet is formed in the side wall of the primary air cavity;

the flame thrower comprises an outer ring cavity and an inner ring cavity, the outer ring cavity surrounds the inner ring cavity, a first injection channel is formed in the bottom cup, an outer gas mixing cavity is formed in the outer ring cavity, mixed gas in the outer gas mixing cavity is supplied by the first injection channel, an inner gas mixing cavity is formed in the inner ring cavity, the inner ring cavity is connected with a second injection channel, and mixed gas in the inner gas mixing cavity is supplied by the second injection channel;

a gap is formed between the outer ring cavity and the bottom cup, the gap is communicated with an air inlet of the second injection channel, a primary air channel is formed between the outer ring cavity and the primary air cavity, and the primary air channel is communicated with the first primary air inlet.

In the burner, air can enter the second injection channel from the gap to be mixed with fuel gas, so that the inner ring cavity can adopt an air inlet mode of upper air inlet; air can enter the primary air cavity from the first primary air inlet and also can enter the primary air cavity from the second primary air inlet, so that the outer ring cavity can adopt an air inlet mode of up-down air inlet. Therefore, the upper and lower air inlet of the outer ring cavity and the upper air inlet of the inner ring cavity can be realized, and the heat load of the burner, particularly the outer ring cavity, is ensured.

In some embodiments, the bottom of the bottom cup is provided with a mounting channel, the nozzle seat comprises a first air inlet pipe and a second air inlet pipe, the first air inlet pipe is provided with a first air inlet channel, the second air inlet pipe is provided with a second air inlet channel, a first nozzle is mounted at an air outlet of the first air inlet channel, the first nozzle is opposite to the first injection channel, a second nozzle is mounted at an air outlet of the second air inlet channel, the second injection channel is opposite to the second nozzle, and the second air inlet pipe is at least partially positioned in the mounting channel.

In some embodiments, the primary air cavity is convexly arranged at the side edge of the bottom cup, the primary air cavity is provided with a primary air cavity, the first nozzle is positioned in the primary air cavity, the first injection channel is communicated with the primary air cavity, and the installation channel penetrates through the side face and the bottom face of the primary air cavity.

In some embodiments, the nozzle holder includes an air inlet portion and a baffle plate protruding above the air inlet portion, the height of the baffle plate being adjustable such that the baffle plate opens at least a portion of the cavity through-hole.

In some embodiments, the nozzle holder comprises a first positioning structure, a second positioning structure is arranged on the side wall of the primary air cavity in an outward protruding mode, and the first positioning structure is connected with the second positioning structure and jointly limits the position of the nozzle holder on the bottom cup from different at least two directions.

In some embodiments, the nozzle holder includes a connection portion and a mounting plate, the connection portion connects the first air inlet pipe and the second air inlet pipe, a side surface of the connection portion is formed with a first positioning surface, a bottom surface of the mounting plate is formed with a second positioning surface, the first positioning surface and the second positioning surface form the first positioning structure, the second positioning structure includes a first support plate and a second support plate, a side surface of the first support plate is engaged with the first positioning surface, and a top surface of the second support plate is engaged with the second positioning surface.

In some embodiments, the number of the mounting plates is two, the two mounting plates are respectively arranged on two opposite sides of the first air inlet pipe, the number of the second support plates is two, and the first support plate is connected with the two second support plates.

In certain embodiments, the at least two directions comprise two directions perpendicular to each other.

In some embodiments, the nozzle holder includes a connection portion that connects the first air intake pipe and the second air intake pipe, the connection portion being provided with a connection passage that communicates with at least the first air intake passage.

In some embodiments, the central axis of the first air intake pipe and the central axis of the second air intake pipe are offset in the thickness direction of the burner.

In certain embodiments, the torch has a first center and the bottom cup has a second center, the first center being disposed off-center from the second center.

The gas cooker of the embodiment of the invention comprises the burner of any embodiment.

In the gas cooker, air can enter the second injection channel from the gap to be mixed with gas, so that the inner ring cavity can adopt an air inlet mode of upper air inlet; air can enter the primary air cavity from the first primary air inlet and also can enter the primary air cavity from the second primary air inlet, so that the outer ring cavity can adopt an air inlet mode of up-down air inlet. Therefore, the upper and lower air inlet of the outer ring cavity and the upper air inlet of the inner ring cavity can be realized, and the heat load of the burner, particularly the outer ring cavity, is ensured.

Additional aspects and advantages of embodiments of the 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.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic perspective view of a burner according to an embodiment of the present invention;

FIG. 2 is another schematic perspective view of a burner according to an embodiment of the present invention;

FIG. 3 is an exploded perspective view of a burner according to an embodiment of the present invention;

FIG. 4 is a perspective view of a bottom cup of a burner according to an embodiment of the present invention;

FIG. 5 is an exploded perspective view of the bottom cup of the burner of the present embodiment;

FIG. 6 is a top view of a burner of an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of the combustor of FIG. 6 along section line B;

FIG. 8 is a side view of a burner according to an embodiment of the present invention;

FIG. 9 is a schematic perspective view of a bottom cup upper cover of a burner in accordance with an embodiment of the present invention;

FIG. 10 is another perspective view of the bottom cup upper cover of the burner of the embodiment of the present invention;

FIG. 11 is a perspective view of a base cup housing of a burner according to an embodiment of the present invention;

FIG. 12 is another perspective view of a base cup housing of a burner according to an embodiment of the present invention;

FIG. 13 is a schematic perspective view of a nozzle holder of a burner according to an embodiment of the present invention;

FIG. 14 is another perspective view of a nozzle holder of a burner according to an embodiment of the present invention;

FIG. 15 is a schematic cross-sectional view of the combustor of FIG. 6 along section line A;

FIG. 16 is a perspective view of a base cup holder and nozzle holder of a burner according to an embodiment of the present invention;

FIG. 17 is another perspective view of a base cup holder and nozzle holder of a burner according to an embodiment of the present invention;

FIG. 18 is a schematic perspective view of a flame thrower of a burner of an embodiment of the invention;

FIG. 19 is an enlarged schematic view of a portion of a flame thrower I of the combustor of FIG. 18;

fig. 20 is another perspective view of a flame thrower of a burner of an embodiment of the invention.

Description of main reference numerals:

a burner 100;

the bottom cup 10, the first injection channel 101, the connecting channel 102, the bottom cup cover 11, the first engagement surface 110, the first channel engagement surface 1101, the first connection engagement surface 1102, the top wall 111, the first mounting wall 112, the first channel portion 113, the first recess 1131, the cover connection slot 114, the outer ring air outlet 115, the inner ring air outlet 116, the first support structure 117, the second support structure 118, the positioning slot 119, the bottom cup holder 12, the second engagement surface 120, the second connection engagement surface 1201, the second channel engagement surface 1202, the third connection engagement surface 1203, the bottom wall 121, the second mounting wall 122, the second channel portion 123, the second recess 1231, the first mounting slot 124, the bottom wall connection slot 125, the mounting channel 126, the mounting through hole 127, the primary air cavity 13, the primary air cavity 131, the cavity through hole 132, the ring 133, the opening 1331, the third support structure 1332, the cavity body 134, the first support plate 135, the first support plate 1, the second support plate 1352, the second mounting hole 1353, the primary air cavity 13514;

the nozzle holder 20, the air intake portion 21, the first air intake pipe 211, the first air intake passage 2111, the second air intake pipe 212, the second air intake passage 2121, the horizontal pipe 2122, the vertical pipe 2123, the first connecting portion 213, the first positioning surface 2132, the baffle 22, the second positioning structure 23, the mounting plate 24, the second positioning surface 241, the third mounting hole 242, the first nozzle 25, the second nozzle 26;

the flame thrower 30, the gap 301, the primary air passage 302, the outer ring cavity 31, the fourth support structure 311, the fifth support structure 312, the sixth support structure 313, the inner ring cavity 32, the positioning block 322, the second connection portion 33, the gas mixing cavity 34, the outer gas mixing cavity 341, the inner gas mixing cavity 342, the fire hole 35, the outer ring fire hole 351, the inner ring fire hole 352, the outer ring connection passage 36, the second injection passage 37, the side wall 38, the fire groove 39;

fire cover 40, outer ring fire cover 41, inner ring fire cover 42.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

It should be noted that, the numbers given before the elements or components such as "first" and "second" … of the present invention are given in order to distinguish these elements from other elements by name, and thus, it may happen that the order in which a certain element is drawn out by the claims is different from the order in which the element is drawn out by the specification, particularly the specific embodiment. In this case, for convenience of understanding, a specific description will be given in detail in the embodiment.

Referring to fig. 1 to 3, a burner 100 according to an embodiment of the present invention includes a base cup 10, a nozzle holder 20, a flame arrester 30, and a fire cover 40. A torch 30 is provided on the bottom cup 10. The bottom cup 10 is provided with a primary air cavity 13, and the nozzle base 20 is mounted on the side edge of the primary air cavity 13. The burner 100 of the embodiment of the present invention is applicable to the gas cooker of the embodiment of the present invention.

Referring to fig. 4 and 5, the base cup 10 includes a base cup cover 11 and a base cup base 12. The bottom cup cover 11 is mounted on the bottom cup base 12, for example, the bottom cup cover 11 is riveted with the bottom cup base 12. To enlarge the primary air cavity 13, in the embodiment of the present invention, the primary air cavity 13 is protruded at the side of the bottom cup 10. The top of the primary air cavity 13 is provided with a first primary air inlet.

Referring to fig. 5 to 7, a first injection passage 101 having a Venturi effect is provided in the bottom cup 10. The bottom cup 10 is provided with a connecting channel 102. The connecting channel 102 has a guiding effect on the mixture of air and gas. The connecting channel 102 is an arc-shaped bottom surface, and the connecting channel 102 is connected with the arc surface of the air outlet end of the first injection channel 101, so that the resistance of air flow flowing in the connecting channel 102 can be reduced. To ensure the flow rate of the air flow out of the connection channel 102, the connection channel 102 may be tapered in the air flow direction. The connecting channel 102 and the first injection channel 101 may together form a gas-air mixture channel of the fuel gas and air of the bottom cup 10. In addition, a first mounting hole (not shown) penetrating the bottom cup 10 may be opened in the thickness direction (up-down direction as shown in fig. 7) of the bottom cup 10. The first mounting hole may be used to mount a thermocouple (not shown) and an ignition needle (not shown).

In the embodiment of the invention, a single first injection channel 101 and a single connecting channel 102 are formed in the bottom cup 10. In addition, the single-side gas separation of the first injection passage 101 can reduce the resistance of the airflow to the maximum extent. In the example of fig. 7, the first injection channel 101 is arranged substantially horizontally.

Referring to fig. 6 and 8, the bottom cup 10 has a first center x (corresponding to the second center in the claims), and a broken line m1 in fig. 8 is a central axis where the first center x is located). The primary air cavity 13 has a second center y (the broken line m2 in fig. 8 is the central axis where the second center y is located). The first center x and the second center y are eccentrically disposed.

Specifically, referring to fig. 6, in the illustrated embodiment, the planar shapes of the bottom cup cover 11 and the bottom cup base 12 are regular, and the planar shape of the primary air cavity 13 is regular. For example, the planar shapes of the bottom cup base 12 and the bottom cup cover 11 are all circular, the first center x is the center of the circle where the plane of the bottom cup 10 is located, the planar shape of the primary air cavity 13 is circular arc, and the second center y is the center of the circle where the plane of the primary air cavity 13 is located.

It will be appreciated that in other embodiments, the planar shape of the bottom cup 10 is square, the first center x is the intersection of the diagonals of the square where the plane of the bottom cup 10 is located, the planar shape of the primary air cavity 13 is circular arc, and the second center y is the center of the circle where the plane of the primary air cavity 13 is located. On the one hand, the primary air cavity 13 can be increased, the air inflow of primary air is ensured, and on the other hand, the first injection channel 101 is also facilitated to be increased, so that fuel gas and air can be fully mixed in the first injection channel 101, and further the combustion efficiency of the combustor 100 is facilitated to be improved. It will be appreciated that in other embodiments, the bottom cup cover 11, the bottom cup holder 12, and the primary air cavity 13 may take other shapes.

Referring to fig. 9 and 10, bottom cup cover 11 includes a top wall 111, a first mounting wall 112, and a first channel portion 113. The bottom cup cover 11 is formed with a first engagement surface 110. The bottom cup cover 11 is provided with a cover connecting groove 114. The cover attachment groove 114 is located between the first passage portion 113 and the first mounting wall 112.

The top wall 111 defines an outer annular air outlet 115 and an inner annular air outlet 116. The first injection channel 101 is communicated with the outer ring air outlet 115 through the connecting channel 102. The mixed gas of the fuel gas and the air thus ejected from the first ejection passage 101 can be supplied from the outer ring gas outlet 115 to the flame thrower 30 for combustion.

Specifically, the connection channel 102 connects the air outlet end of the first injection channel 101 and the outer ring air outlet 115. In order to increase the air outlet area of the outer ring air outlet 115 and to ensure uniformity of the air outlet, the outer ring air outlet 115 is provided in an arc shape, for example, a circular arc shape. In addition, the edge of the outer ring air outlet 115 is formed with a first support structure 117 protruding from the surface of the top wall 111. Positioning grooves 119 are formed on both sides of the inner ring air outlet 116.

Referring to fig. 9, a second support structure 118 is formed on the upper surface of the top wall 111.

Referring to fig. 10, the first mounting wall 112 is protruding from the top wall 111. The first channel portion 113 is protruding from the top wall 111. The first mounting wall 112 surrounds the first channel portion 113.

The first channel portion 113 is provided with a first groove 1131. The first channel portion 113 is formed with first channel engagement surfaces 1101 on both sides of the first groove 1131. The first passage portion 113 is formed with a first connection engagement surface 1102. The first channel engagement surface 1101, the first connection engagement surface 1102, and the end surface of the first mounting wall 112 are coplanar. The first engagement surface 110 includes a first channel engagement surface 1101, a first connection engagement surface 1102, and an end surface of a first mounting wall 112.

Referring to fig. 11 and 12, the base cup body 12 includes a bottom wall 121, a second mounting wall 122, and a second channel portion 123. The second mounting wall 122 is provided protruding from the bottom wall 121. The top wall 111 and the bottom wall 121 are opposite. The bottom wall 121 is opposite the first engagement surface 110.

Specifically, the bottom wall 121 and the second mounting wall 122 are formed together with a first mounting groove 124. First mounting wall 112 is at least partially nested in first mounting groove 124 and at least partially in overlapping engagement with second mounting wall 122, i.e., base cup lid 11 is mounted to base cup 12 and partially within first mounting groove 124.

In the embodiment of the present invention, the first mounting wall 112 and the second mounting wall 122 are overlapped and engaged in the direction from the inside to the outside of the burner 100 (such as the horizontal direction of fig. 7). Thus, when the burner 100 is in operation, the first mounting wall 112 and the second mounting wall 122 are tightly connected due to the temperature rise of the bottom cup 10, so that the bottom cup 10 can be ensured to have better sealing performance, the bottom cup cover 11 is mounted on the bottom cup base 12 with better sealing performance, and the bottom cup 10 is not easy to leak air. This does not cause an insufficient amount of the mixture of air and gas from the flame thrower 30 to affect the normal operation of the burner 100 (the most serious hazard of gas leakage is a safety hazard). In one example, the bottom cup 10 may be formed from cast aluminum. In an embodiment of the present invention, the first mounting wall 112 is closer to the first center x of the bottom cup 10 than the second mounting wall 122.

The bottom wall 121 is provided with a bottom wall connecting groove 125. The cover attachment slot 114 and the bottom wall attachment slot 125 cooperate to form the attachment channel 102. The top surface of the bottom wall 121 is formed with a second engagement surface 120. The second mounting wall 122 surrounds the second engagement surface 120. The first engagement surface 110 and the second engagement surface 120 are engaged. At least one of the first joint surface 110 and the second joint surface 120 is processed using a finish turning process. Thus, the sealing effect is better.

The second engagement surface 120 includes a second connection engagement surface 1201, a second channel engagement surface 1202, and a third connection engagement surface 1203. The end surface of the first mounting wall 112 engages the second connection engagement surface 1201. In addition, the bottom of the bottom cup 10 is provided with a mounting passage 126 and a mounting through hole 127. The mounting channel 126 connects to the mounting through hole 127. Mounting channels 126 extend through the sides and bottom of the primary air cavity 13.

In order to enhance the sealing effect, the end surface of the first mounting wall 112 meets the top surface of the bottom wall 121. It should be noted that, the junction between the end surface of the first mounting wall 112 and the top surface of the bottom wall 121 may also be processed by a finish turning process. That is, the end surface of the first mounting wall 112 may be finished, or the portion of the top surface of the bottom wall 121 that is joined to the first mounting wall 112 may be finished, or both the end surface of the first mounting wall 112 and the portion of the top surface of the bottom wall 121 that is joined to the first mounting wall 112 (i.e., the second connecting joint 1201) may be finished.

The second channel portion 123 is located at the bottom of the first mounting groove 124. The first channel portion 113 and the second channel portion 123 are connected. The second mounting wall 122 surrounds the second channel portion 123. The second channel portion 123 is provided with a second groove 1231. The first groove 1131 and the second groove 1231 together form the first injection passage 101. This facilitates the forming of the first injection passage 101.

The second channel portion 123 is formed with second channel engagement surfaces 1202 on both sides of the second groove 1231. The first channel engagement surface 1101 and the second channel engagement surface 1202 are engaged. At least one of the first channel engagement surface 1101 and the second channel engagement surface 1202 is treated using a finish machining process. The second channel portion 123 is formed with a third connection engagement surface 1203. The first connection engagement surface 1102 and the third connection engagement surface 1203 are engaged. The second and third connection interfaces 1201, 1203 surround the bottom wall connection groove 125. The second connection interface 1201, the second channel interface 1202, and the third connection interface 1203 are coplanar.

Referring to fig. 4 and 5, the primary air cavity 13 is provided with a primary air cavity 131 communicating with the injection passage. The side wall of the primary air cavity 13 is provided with a cavity through hole 132 communicated with the primary air cavity 131. The cavity through hole 132 serves as a second primary air inlet.

Specifically, the primary air cavity 13 includes an annular member 133 and a cavity body 134. The ring 133 projects from the side of the bottom cup cover 11. The ring 133 has an opening 1331, the opening 1331 forming a first primary air inlet. A third supporting structure 1332 is formed by upwardly protruding one side edge of the ring 133 connected with the bottom cup cover 11. The first 117, second 118 and third 1332 support structures are of uniform height.

The cavity body 134 projects from the side of the base cup body 12. The ring members 133 are provided on the top wall of the chamber body 134 and together form the primary air chamber 131. The opening 1331 communicates with the primary air chamber 131. The sidewall of the cavity body 134 is provided with a cavity through hole 132. Air may enter the primary air chamber 131 through the chamber through-holes 132 and the openings 1331. Wherein the planar shape of the ring 133 is arc-shaped.

Referring to fig. 3 and 5, the side wall of the primary air cavity 13 is provided with a first positioning structure 135 (corresponding to the second positioning structure in the claims) protruding outwards. The first positioning structure 135 includes a first support plate 1351 and a second support plate 1352. In the illustrated embodiment, the first support plate 1351 is a circular arc plate, and the second support plate 1352 is a flat plate. The second support plate 1352 is provided with a second mounting hole 1353.

To facilitate maintenance and repair of the nozzle holder 20, the nozzle holder 20 is detachably mounted to a side wall of the primary air cavity 13. The nozzle holder 20 is located at the cavity through hole 132 and is configured to open at least a portion of the cavity through hole 132. It should be noted that the nozzle holder 20 may be manufactured by a loose core process. When the nozzle holder 20 opens a portion of the cavity through-hole 132, the opened portion of the cavity through-hole 132 may serve as a second primary air inlet; when the nozzle holder 20 opens all of the cavity through-holes 132, the entire cavity through-holes 132 may serve as the second primary air inlet. In an embodiment of the present invention, the nozzle holder 20 opens a portion of the cavity through-hole 132.

Referring to fig. 3, 13 and 14, the nozzle holder 20 includes an air inlet 21, a baffle 22, a second positioning structure 23 (corresponding to the first positioning structure in the claims), and a mounting plate 24. The baffle 22 is provided protruding above the air intake portion 21. The height of the baffle 22 is adjustable such that the baffle 22 opens at least a portion of the cavity through-hole 132.

It will be appreciated that in other embodiments, the nozzle holder 20 may omit the baffle 22 to achieve a larger second primary air inlet, increasing the amount of intake air. In this case, it is also understood that the height of the barrier 22 is zero, and the barrier 22 opens all of the cavity through-holes 132.

The first positioning structure 135 is connected with the second positioning structure 23 and jointly defines the position of the nozzle seat 20 on the bottom cup 10 from different at least two directions so as to fix the nozzle seat 20, and the concentricity of the first nozzle 25 and the first injection channel 101 is better, so that the air flow speed of the air inlet of the first injection channel 101 is ensured. The mounting plate 24 is provided on the air intake portion 21. Preferably, the at least two directions include two directions d1 and d2 perpendicular to each other.

Referring to fig. 7, 13, and 15 to 17, the intake portion 21 includes a first intake pipe 211 and a second intake pipe 212. The first intake pipe 211 is provided with a first intake passage 2111. The first nozzle 25 is installed at the air outlet of the first air intake passage 2111, and the first nozzle 25 is opposite to the first injection passage 101. The second intake pipe 212 is provided with a second intake passage 2121. The second nozzle 26 is installed at the air outlet of the second air inlet passage 2121. The second air inlet conduit 212 is at least partially located within the mounting channel 126. In fig. 15, the second air intake pipe 212 includes a horizontal pipe 2122 and a vertical pipe 2123, the horizontal pipe 2122 being horizontally installed in the installation channel 126. The vertical tube 2123 passes through the mounting through hole 127 and extends into the inner annular primary air chamber 14 of the bottom cup. More specifically, the primary air chamber 131 can be used as an outer ring primary air chamber, and the inner ring primary air chamber 14 is opened on the bottom cup cover 11.

In the embodiment of the present invention, referring to fig. 7 and 15, the center axis g of the first intake pipe 211 and the center axis h of the second intake pipe 212 are offset in the thickness direction of the burner 100. The thickness direction of the burner 100 is the up-down direction of fig. 7 or 15. The first air intake pipe 211 and the second air intake pipe 212 are circular pipes, and the first air intake pipe 211 is parallel to the second air intake pipe 212.

The air intake portion 21 includes a first connection portion 213 (corresponding to a connection portion in the claims). The first connection 213 connects the first intake pipe 211 and the second intake pipe 212. The first connection portion 213 is provided with an air inlet and a connection passage. The connection passage communicates with at least the first intake passage 2111. In the embodiment of the present invention, the connection passage communicates with the first intake passage 2111, but does not communicate with the second intake passage 2121, and the second intake pipe 212 is provided with an intake port. The gas is introduced from the inlet of the first connection portion 213 and the inlet of the second inlet pipe 212, and the separate supply of the gas to the inner and outer rings can be realized. Of course, the connection passage may also communicate the first intake passage 2111 and the second intake passage 2121. The gas enters from the gas inlet of the first connecting portion 213, so that the gas can be supplied together by the inner and outer rings, and the gas inlet of the second gas inlet pipe 212 can be sealed by a plug (not shown).

Referring to fig. 14, a first positioning surface 2132 is formed on a side surface of the first connecting portion 213. The bottom surface of the mounting plate 24 is formed with a second positioning surface 241. The first positioning surface 2132 and the second positioning surface 241 constitute the second positioning structure 23. The side of the first support plate 1351 engages the first positioning surface 2132. The top surface of the second support plate 1352 is engaged with the second positioning surface 241.

To further enhance the stability of the mounting of the nozzle holder 20, the number of mounting plates 24 is two. The two mounting plates 24 are respectively provided on opposite sides of the first air intake pipe 211. The number of the second support plates 1352 is two. The first support plate 1351 is connected to two second support plates 1352. Such that the top surfaces of the two second support plates 1352 are capable of engaging the second positioning surfaces 241 of the two mounting plates 24, respectively. The first support plate 1351 is a circular arc plate, and is configured to support the first air inlet pipe 211. That is, the first air inlet pipe 211 may be supported and positioned by the first support plate 1351.

Referring to fig. 13, the mounting plate 24 is provided with a third mounting hole 242. The third mounting holes 242 are aligned with the second mounting holes 1353 of the second support plate 1352. The third mounting holes 242 and the second mounting holes 1353 are provided for fasteners (not shown) to secure the nozzle holder 20 and the base cup 10.

Referring to fig. 1 and 8, a flame arrester 30 is mounted on the bottom cup cover 11. In this embodiment, the flame thrower 30 is located above the top wall 111. The offset portion of the top wall 111 from the flame arrester 30 may be used to provide a liquid tray (not shown), which may make full use of the installation space of the top wall 111 and make the overall structure of the burner 100 more compact. In one example, the flame thrower 30 may be made of cast aluminum.

Referring to fig. 18 to 20, the torch 30 includes an outer ring cavity 31 and an inner ring cavity 32. The outer ring cavity 31 is spaced around the inner ring cavity 32. The outer ring cavity 31 and the inner ring cavity 32 are connected by a second connection 33. The flame thrower 30 is formed with a gas mixing chamber 34 and a flame hole 35 communicating with the gas mixing chamber 34. The gas mixing chamber 34 includes an outer gas mixing chamber 341 and an inner gas mixing chamber 342. The outer ring cavity 31 is provided with an outer gas mixing cavity 341 and an outer ring connecting channel 36. The outer ring connection passage 36 communicates with the outer ring gas outlet 115 and the outer gas mixing chamber 341. The inner annular cavity 32 is connected with a second injection passage 37, and the second injection passage 37 can have a venturi effect. The second injection passage 37 is opposite the second nozzle 26. The second injection passage 37 is perpendicular to the first injection passage 101. In the embodiment of the invention, the second injection channel 37 is a vertical injection channel, and the first injection channel 101 is a horizontal injection channel. In addition, the second intake pipe 212 is disposed further down than the first intake pipe 211, so that the length of the pipe body forming the second injection passage 37 can be increased, so that the mixed gas supplied to the inner ring cavity 32 can be sufficiently mixed.

The fire holes 35 include an outer ring fire hole 351 and an inner ring fire hole 352. The outer ring fire holes 351 communicate with the outer gas mixing chamber 341. The inner annular flame holes 352 communicate with the inner gas mixing chamber 342. The outer ring air outlet 115 communicates with the first injection passage 101 and the outer gas mixing chamber 341. The inner ring air outlet 116 communicates with the second injection passage 37 and the internal combustion air mixing chamber 342.

In the example of fig. 18, the number of the second connecting portions 33 is four, and gaps exist between the four second connecting portions 33, from which air can enter the outside of the inner ring cavity 32 and the inside of the outer ring cavity 31 to supplement secondary air.

In order to increase the area of the fire hole 35 and improve the injection capacity of the fire hole 35, the root of the fire hole 35 is arc-shaped, so that the processing is also more convenient. The flame arrestor 30 includes a sidewall 38 that encloses the gas mixing chamber 34. The side wall 38 is provided with a plurality of spaced fire holes 35, and a fire groove 39 is arranged between two adjacent fire holes 35. The fire groove 39 communicates the gas mixing chamber 34 with the adjacent two fire holes 35. More specifically, the fire groove 39 located in the outer ring cavity communicates with the outer gas mixing chamber 341 and the outer ring fire hole 351, and the fire groove 39 located in the inner ring cavity communicates with the inner gas mixing chamber 342 and the inner ring fire hole 352. In the illustrated embodiment, the fire slot 39 is T-shaped, and the flame arrester 30 has better stability for transmitting fire.

To facilitate installation of the flame thrower 30, the inner ring cavity 32 is formed with positioning blocks 322 on both sides of the air intake end of the second injection passage 37. The positioning blocks 322 are matched with the positioning grooves 119 on two sides of the inner ring air outlet 116. The positioning block 322 may be inserted into the positioning groove 119. In order to improve the stability of the installation, the shape of the positioning block 322 is identical to that of the positioning groove 119, and the positioning block 322 has a plate shape with a uniform thickness. In the embodiment of the present invention, the number of the positioning grooves 119 and the number of the positioning blocks 322 are two.

The bottom of the outer ring cavity 31 is convexly provided with a fourth supporting structure 311, a fifth supporting structure 312 and a sixth supporting structure 313 which are consistent in height. The fourth support structure 311 is cooperatively associated with the first support structure 117, the fifth support structure 312 is cooperatively associated with the second support structure 118, and the sixth support structure 313 is cooperatively associated with the third support structure 1332. In this manner, when the flame arrester 30 is mounted on the bottom cup 10, the sixth support structure 313 and the third support structure 1332 form a partition plate that separates the outer ring primary air and the inner ring primary air from the secondary air, so that the supply of the primary air of the outer ring cavity 31 and the inner ring cavity 32 does not affect each other.

For stable installation of the flame arrester 30 with the bottom cup 10, the fourth support structure 311 is consistent with the first support structure 117 in shape and size, the fifth support structure 312 is consistent with the second support structure 118 in shape and size, and the sixth support structure 313 is consistent with the third support structure 1332 in shape and size.

Referring to fig. 1 and 15, a gap 301 is formed between the outer ring cavity 31 and the bottom cup 10, and the gap 301 communicates with the air inlet of the second injection passage 37. Air can enter the second injection channel 37 from the gap 301 to be mixed with fuel gas, and the mixed first mixed gas enters the inner ring cavity 32 after exiting from the second injection channel 37, is sprayed outwards through the inner ring fire holes 352 and is combusted to form inner ring fire. A primary air passage 302 is formed between the outer annular cavity 31 and the primary air cavity 13, and the primary air passage 302 communicates with an opening 1331 of the primary air cavity 13. Air can enter the primary air cavity 131 from the primary air channel 302 and the opening 1331 (namely, a first primary air inlet) and enter the primary air cavity 131 from the cavity through hole 132 (namely, a second primary air inlet), then is mixed with fuel gas in the first injection channel 101, and the mixed second mixed gas is guided to the outer ring air outlet 115 through the connecting channel 102 after being emitted from the first injection channel 101, enters the outer ring cavity 31, is sprayed outwards through the outer ring fire hole 351 and is combusted to form outer ring fire. Thus, the outer ring cavity 31 can adopt an air inlet mode of up-down air inlet, and the inner ring cavity 32 can adopt an air inlet mode of up-down air inlet. Thus, the heat load of the burner 100, in particular of the outer annular cavity 31, is ensured.

Referring to fig. 6 and 8, the torch 30 has a third center k (corresponding to the first center in the claims, a broken line m3 in fig. 8 is a central axis where the third center k is located). The first center x is disposed eccentrically to the third center k. Thus, the bottom cup 10 can have more space to set the first injection channel 101 longer, so that the first injection channel 101 has larger injection capacity, so that the heat load of the burner 100 can be improved, the amount of the mixed gas of the fuel gas and the air entering the outer fuel gas mixing cavity 341 can be ensured, and the combustion stability of the burner 100 can be ensured. In the present embodiment, the third center k is concentric with the second center y. The dashed line m3 coincides with the dashed line m 2. Of course, it is understood that in other embodiments, the third center k may be offset from the second center y.

The planar shape of the flame thrower 30 may be regular, for example, the planar shape of the flame thrower 30 shown in the drawing is circular. In other embodiments, the planar shape of the flame thrower 30 may be elliptical arc or square, etc. When the planar shape of the flame thrower 30 is circular and the planar shape of the primary air cavity 13 is circular arc, the center of the circle where the plane of the flame thrower 30 is located overlaps with the center of the circle where the plane of the primary air cavity 13 is located. This is more advantageous for mixing of gas and air.

The fire cover 40 includes an outer ring fire cover 41 and an inner ring fire cover 42. An outer ring fire cover 41 is provided on the outer ring cavity 31. An inner ring fire cover 42 is provided over the inner ring cavity 32. The outer ring fire cover 41 and the inner ring fire cover 42 are spaced apart. The middle part of the inner ring fire cover 42 is of a solid structure.

In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The burner is characterized by comprising a bottom cup, a flame thrower and a nozzle seat, wherein the flame thrower is arranged on the bottom cup, the bottom cup is provided with a primary air cavity, the nozzle seat is detachably arranged on the side wall of the primary air cavity, a first primary air inlet is formed in the top of the primary air cavity, and a cavity through hole serving as a second primary air inlet is formed in the side wall of the primary air cavity;

a gap is formed between the outer ring cavity and the bottom cup, the gap is communicated with an air inlet of the second injection channel, a primary air channel is formed between the outer ring cavity and the primary air cavity, and the primary air channel is communicated with the first primary air inlet;

the bottom of the bottom cup is provided with a mounting channel, the nozzle seat comprises a first air inlet pipe and a second air inlet pipe, the first air inlet pipe is provided with a first air inlet channel, the second air inlet pipe is provided with a second air inlet channel, a first nozzle is mounted at an air outlet of the first air inlet channel, the first nozzle is opposite to the first injection channel, a second nozzle is mounted at an air outlet of the second air inlet channel, the second injection channel is opposite to the second nozzle, and the second air inlet pipe is at least partially positioned in the mounting channel;

the primary air cavity is convexly arranged on the side edge of the bottom cup, a primary air cavity is formed in the primary air cavity, the first nozzle is positioned in the primary air cavity, the first injection channel is communicated with the primary air cavity, and the installation channel penetrates through the side face and the bottom face of the primary air cavity;

the nozzle seat comprises an air inlet part and a baffle plate convexly arranged on the air inlet part, and the height of the baffle plate is adjustable so that the baffle plate can open at least one part of the cavity through hole;

the nozzle seat comprises a first positioning structure, a second positioning structure is outwards convexly arranged on the side wall of the primary air cavity, and the first positioning structure is connected with the second positioning structure and jointly limits the position of the nozzle seat on the bottom cup from at least two different directions;

the nozzle seat comprises a connecting part and a mounting plate, the connecting part is connected with the first air inlet pipe and the second air inlet pipe, a first positioning surface is formed on the side face of the connecting part, a second positioning surface is formed on the bottom face of the mounting plate, the first positioning surface and the second positioning surface form the first positioning structure, the second positioning structure comprises a first supporting plate and a second supporting plate, the side face of the first supporting plate is connected with the first positioning surface, and the top face of the second supporting plate is connected with the second positioning surface;

the central shaft of the first air inlet pipe and the central shaft of the second air inlet pipe are staggered in the thickness direction of the burner, the first air inlet pipe and the second air inlet pipe are arranged in parallel, the second air inlet pipe comprises a horizontal pipe and a vertical pipe, the horizontal pipe is horizontally arranged in the installation channel, and the vertical pipe penetrates through the installation through hole and stretches into the inner ring primary air cavity of the bottom cup.

2. The burner of claim 1, wherein the number of the mounting plates is two, the two mounting plates are respectively disposed at opposite sides of the first air inlet pipe, the number of the second support plates is two, and the first support plate is connected with the two second support plates.

3. The burner of claim 1, wherein the at least two directions comprise two directions perpendicular to each other.

4. The burner of claim 1, wherein the nozzle holder includes a connection portion connecting the first air intake pipe and the second air intake pipe, the connection portion being provided with a connection passage, the connection passage communicating with at least the first air intake passage.

5. The burner of claim 1, wherein the flame thrower has a first center and the base cup has a second center, the first center being disposed off-center from the second center.

6. A gas hob, characterized in, that it comprises a burner according to any one of the claims 1-5.