CN109000240B

CN109000240B - Burner and gas cooker

Info

Publication number: CN109000240B
Application number: CN201811026858.XA
Authority: CN
Inventors: 林梦; 施国生; 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: 2023-11-28
Anticipated expiration: 2038-09-04
Also published as: CN109000240A

Abstract

The invention discloses a combustor and a gas cooker. The burner includes a nozzle holder and a bottom cup. The nozzle holder includes a first positioning structure. The nozzle seat is provided with a channel, and the air outlet end of the channel is used for installing the nozzle. An injection channel with a Venturi effect is arranged in the bottom cup. The bottom cup is provided with a primary air cavity which is provided with a primary air cavity. The primary air cavity is communicated with the channel and the injection channel. The side wall of the primary air cavity is outwards convexly provided with a second positioning structure. The first positioning structure is connected with the second positioning structure and jointly defines the position of the nozzle seat on the bottom cup from at least two different directions so that the nozzle is coaxial with the injection channel. In the burner, 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 different at least two directions, so that the nozzle is coaxial with the injection channel, the nozzle is beneficial to injecting fuel gas into the injection channel, and the air flow speed of air inlet of the injection channel 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

In the related art, a venturi tube is adopted by a burner to jet the mixed gas of air and fuel gas to a fuel gas mixing cavity of a flame thrower for combustion. However, in the existing burner, it is difficult to ensure that the nozzle is arranged coaxially with the venturi tube, which may affect the injection of the fuel gas into the venturi tube by the nozzle.

Disclosure of Invention

The invention provides a combustor and a gas cooker.

The burner of the embodiment of the invention comprises:

the nozzle seat comprises a first positioning structure, a channel is formed in the nozzle seat, and the air outlet end of the channel is used for installing a nozzle;

the bottom cup is internally provided with an injection channel with a Venturi effect, the bottom cup is provided with a primary air cavity, the primary air cavity is communicated with the channel and the injection channel, the side wall of the primary air cavity is outwards protruded to be provided with a second positioning structure, 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 directions so that the nozzle is coaxial with the injection channel.

In the burner, the first positioning structure of the nozzle seat is connected with the second positioning structure of the primary air cavity and jointly limits the position of the nozzle seat on the bottom cup from different at least two directions, so that the nozzle and the injection channel are coaxial, the nozzle is beneficial to injecting fuel gas into the injection channel, and the air flow speed of air inlet of the injection channel is ensured.

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

In some embodiments, the nozzle holder includes an air inlet portion and a mounting plate, the air inlet portion is provided with the channel, the mounting plate is disposed on the air inlet portion, the air inlet 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 at two opposite sides of the air inlet part, the number of the second support plates is two, and the first support plate is connected with the two second support plates.

In some embodiments, the mounting plate is provided with a mounting groove, the second support plate is provided with a mounting hole correspondingly communicated with the mounting groove, and the mounting groove and the mounting hole are used for fixing the nozzle seat and the bottom cup by a fixing piece.

In certain embodiments, the channel comprises a first channel and a second channel, the first channel has a first air inlet central axis along the air inlet direction of the nozzle seat, the second channel has a second air inlet central axis along the air inlet direction of the nozzle seat, and the first air inlet central axis and the second air inlet central axis are staggered in the thickness direction of the burner.

In certain embodiments, the first channel is closer to the air intake end of the air intake than the second channel, and the first channel has a cross-sectional dimension that is greater than a cross-sectional dimension of the second channel.

In some embodiments, the nozzle holder is detachably mounted on a side wall of the primary air cavity, a cavity through hole communicated with the primary air cavity is formed in the side wall of the primary air cavity, and the nozzle holder is located at the cavity through hole and is configured to block or open the cavity through hole.

In some embodiments, the nozzle holder includes an air inlet portion and a baffle plate protruding on the air inlet portion, the air inlet portion is provided with the channel, and a height of the baffle plate is adjustable so that the baffle plate blocks or opens the cavity through hole.

In some embodiments, the baffle fills the cavity through hole when the baffle obscures the cavity through hole.

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

In the gas cooker, the first positioning structure of the nozzle seat is connected with the second positioning structure of the primary air cavity and jointly limits the position of the nozzle seat on the bottom cup from different at least two directions, so that the nozzle and the injection channel are coaxial, the nozzle is beneficial to injecting gas into the injection channel, and the air flow speed of air inlet of the injection channel 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 a bottom view of a burner of an embodiment of the present invention;

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

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

FIG. 5 is a top view of a burner according to an embodiment of the present invention;

FIG. 6 is an exploded perspective view of a burner according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a burner according to an embodiment of the present invention;

FIG. 8 is another cross-sectional schematic view of a combustor of an embodiment of the present invention;

FIG. 9 is yet another cross-sectional schematic view of a combustor of an embodiment of the invention;

FIG. 10 is a top view of a burner according to an embodiment of the present invention with a fire cover removed;

FIG. 11 is a schematic perspective view of a base cup and nozzle holder of a burner according to an embodiment of the present invention;

FIG. 12 is an exploded schematic view of a base cup and nozzle holder of a burner of an embodiment of the present invention;

FIG. 13 is another exploded schematic view of a base cup and nozzle holder of a burner of an embodiment of the present invention;

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

FIG. 15 is another perspective view of a base cup holder and nozzle holder of a burner according to an embodiment of the present invention;

FIG. 16 is a schematic perspective view of a bottom cup cover of a burner in accordance with an embodiment of the invention;

FIG. 17 is another perspective view of a bottom cup cover of a burner in accordance with an embodiment of the invention;

FIG. 18 is a further schematic perspective view of a bottom cup cover of a burner in accordance with an embodiment of the invention;

FIG. 19 is a perspective view of a base cup housing of a burner according to an embodiment of the present invention;

FIG. 20 is another perspective view of a base cup housing of a burner according to an embodiment of the present invention;

FIG. 21 is a further schematic perspective view of a base cup housing of a burner according to an embodiment of the present invention;

FIG. 22 is a schematic perspective view of a nozzle holder of a burner according to an embodiment of the present invention;

FIG. 23 is yet another perspective view of a nozzle holder of a burner according to an embodiment of the present invention;

FIG. 24 is a schematic perspective view of a flame thrower of a burner of an embodiment of the invention;

FIG. 25 is an enlarged schematic view of a portion of a flame thrower I of the combustor of FIG. 24;

fig. 26 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 injection channel 101, the connection channel 102, the first connection channel 1021, the first sub-connection channel 10211, the second sub-connection channel 10212, the second connection channel 1022, the third sub-connection channel 10221, the fourth sub-connection channel 10222, the first mounting hole 103, the bottom cup lid 11, the first engagement surface 110, the first channel engagement surface 1101, the first connection engagement surface 1102, the second positioning hole 1103, the top wall 111, the top surface 1110, the first mounting wall 112, the first channel portion 113, the first recess 1131, the air outlet 114, the outer ring air outlet 1141, the inner ring air outlet 1142, the first outer ring air outlet 1143, the second outer ring air outlet 1144, the first inner ring air outlet 1145 the second inner ring air outlet 1146, the first secondary air passage 115, the first positioning structure 1151, the cover attachment groove 116, the base cup holder 12, the fixing hole 1201, the bottom wall 121, the second engagement surface 1210, the second connection engagement surface 12101, the second passage engagement surface 12102, the third connection engagement surface 12103, the bottom wall attachment groove 1211, the second mounting wall 122, the second passage portion 123, the second groove 1231, the first mounting groove 124, the primary air cavity 13, the primary air cavity 131, the cavity through hole 132, the ring 133, the opening 1331, the first positioning hole 1332, the cavity body 134, the positioning post 1341, the second positioning structure 135, the first support plate 1351, the second support plate 1352, the second mounting hole 1353;

The nozzle holder 20, the air inlet 21, the first positioning surface 210, the first channel 211, the second channel 212, the first air inlet 213, the second air inlet 214, the baffle 22, the third positioning structure 23, the mounting plate 24, the second positioning surface 241, the second mounting groove 242;

the flame thrower 30, the side wall 301, the flame groove 302, the pressure release chamber 303, the pressure release port 3031, the gas mixing chamber 31, the outer gas mixing chamber 311, the inner gas mixing chamber 312, the flame hole 32, the outer ring flame hole 321, the inner ring flame hole 322, the outer ring cavity 33, the inner ring cavity 34, the second secondary air channel 341, the fourth positioning structure 342, the positioning groove 343, the positioning block 344, the first connecting part 35, the flame thrower connecting channel 351, the second connecting part 36, the flow guiding surface 37, the baffle 38, the joint 381, the mixed gas channel 39;

fire cover 40, outer ring fire cover 41, inner ring fire cover 42, and inner ring fire cover through hole 421.

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 26, 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 may be applied to a gas cooker of an embodiment of the invention.

Referring to fig. 1-11, a 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, the primary air cavity 13 is provided protruding at a side edge of at least one of the base cup lid 11 and the base cup base 12.

Referring to fig. 6-12, an injection channel 101 with Venturi effect is formed in the bottom cup 10. The bottom cup 10 is provided with a connecting channel 102 (shown in fig. 7). The connecting channel 102 has a guiding effect on the fuel gas. The connection channel 102 includes a first connection channel 1021 and a second connection channel 1022 (shown in fig. 12). The first connecting passage 1021 communicates the injection passage 101 with the second connecting passage 1022. The first connecting passage 1021 is provided with an arc-shaped bottom surface, and the first connecting passage 1021 is connected with the arc surface of the air outlet end of the injection passage 101, so that the resistance of air flow in the first connecting passage 1021 can be reduced. To ensure the flow rate of the air flow out of the connection passage 102, the first connection passage 1021 may be tapered in the air flow direction. In addition, a first mounting hole 103 (as shown in fig. 11) penetrating the bottom cup 10 may be opened in the thickness direction of the bottom cup 10. The first mounting hole 103 may be used to mount a thermocouple (not shown) and an ignition needle (not shown). A single injection passage 101 is provided in the bottom cup 10 of the present embodiment. In the example of fig. 7, the injection channel 101 is arranged substantially horizontally.

Referring to fig. 5 and 7, at least one of the bottom cup cover 11 and the bottom cup base 12 has a first center x (a broken line m1 in fig. 7 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. 7 is the central axis where the second center y is located). The first center x and the second center y are eccentrically disposed.

Specifically, in the example of fig. 5, the planar shapes of the base cup lid 11 and the base 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 cover 11 and the bottom cup base 12 are 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 point of the diagonal lines 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. Thus, on one hand, the primary air cavity 13 can be increased, and the air inflow of the primary air is ensured; on the other hand, the injection channel 101 is also beneficial to being increased, so that the fuel gas and the air can be fully mixed in the injection channel 101, and further the combustion efficiency of the combustor 100 is beneficial to being improved. Of course, 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. 16-19, 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 116. The cover attachment groove 116 is located between the first passage portion 113 and the first mounting wall 112.

The top wall 111 is provided with an air outlet 114. The injection channel 101 communicates with the air outlet 114 through the connecting channel 102. The mixture of gas and air thus ejected from the ejection passage 101 can be supplied from the gas outlet 114 to the flame thrower 30 for combustion.

To enable the burner 100 to form multiple ring flames, the air outlet 114 includes an outer ring air outlet 1141 and an inner ring air outlet 1142. The first connecting passage 1021 connects the air outlet end of the injection passage 101 and the outer ring air outlet 1141. In order to increase the air outlet area of the outer ring air outlet 1141 and ensure the uniformity of the air outlet, the outer ring air outlet 1141 is provided in an arc shape, for example, a circular arc shape, and the center of the circle where the outer ring air outlet 1141 is located overlaps the second center y of the primary air cavity 13. In addition, outer ring air outlet 1141 and inner ring air outlet 1142 protrude from top surface 1110 of top wall 111, respectively.

Referring to fig. 16, in order to make the air outlet of the outer ring air outlet 1141 more uniform, the outer ring air outlet 1141 includes a first outer ring air outlet 1143 and a second outer ring air outlet 1144 disposed at intervals. The first connection path 1021 includes a first sub-connection path 10211 and a second sub-connection path 10212. The first sub-connection passage 10211 and the second sub-connection passage 10212 are respectively connected to both sides of the air outlet end of the injection passage 101. The first sub-connecting passage 10211 communicates with the first outer ring air outlet 1143 and the injection passage 101. The second sub-connecting passage 10212 communicates with the second outer ring air outlet 1144 and the injection passage 101. Wherein, the first sub-connection passage 10211 and the second sub-connection passage 10212 may each be arc-shaped, and the first sub-connection passage 10211 and the second sub-connection passage 10212 may be arranged to be symmetrical with respect to the central axis of the injection passage 101 of the bottom cup 10. In order to reduce the resistance of the airflow, the first sub-connection channel 10211 may be connected to the air outlet end arc surface of the injection channel 101, and the second sub-connection channel 10212 may be connected to the air outlet end arc surface of the injection channel 101.

Referring to fig. 16, in order to make the air outlet of the inner ring air outlet 1142 more uniform, the inner ring air outlet 1142 includes a first inner ring air outlet 1145 and a second inner ring air outlet 1146 disposed at intervals. The second connection channel 1022 includes a third sub-connection channel 10221 and a fourth sub-connection channel 10222. Third sub-coupling passage 10221 communicates with first sub-coupling passage 10211 and first inner ring air outlet 1145. Fourth sub-coupling passage 10222 communicates with second sub-coupling passage 10212 and second inner ring air outlet 1146. A first secondary air passage 115 (shown in fig. 6) is formed in a surface portion of the top wall 111 between the first inner ring air outlet 1145 and the second inner ring air outlet 1146. At this time, the passage formed by the third sub-connection passage 10221 communicating with the first sub-connection passage 10211 and the passage formed by the fourth sub-connection passage 10222 communicating with the second sub-connection passage 10212 do not communicate, and are located on both sides of the first secondary air passage 115, respectively. This increases the secondary air intake area, and the outside air can sufficiently enter the first secondary air passage 115, thereby ensuring the secondary air intake capability.

A surface portion (upper surface portion in the present embodiment) of the top wall 111 is formed with a first positioning structure 1151 that is located in the first secondary air passage 115. The first mounting wall 112 is provided 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.

Referring to fig. 17, 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. 13 to 15 and 19 to 21, the base cup 12 includes a bottom wall 121, a second mounting wall 122, and a second channel 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). In this way, when the burner 100 is in operation, the first mounting wall 112 and the second mounting wall 122 are more 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, and the bottom cup cover 11 is better in sealing performance when being mounted on the bottom cup base 12. The bottom cup 10 is not prone to air leakage. This does not result in an insufficient amount of the mixture of air and gas of the flame thrower 30, which in turn affects the normal operation of the burner 100. 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 1211. The cover attachment slot 116 and the bottom wall attachment slot 1211 together form the attachment channel 102. The connecting passage 102 communicates the injection passage 101 with the air outlet 114. The connecting channel 102 and the injection channel 101 together form the gas-air mixture channel 39 of the base cup 10. The top surface of the bottom wall 121 is formed with a second engagement surface 1210. The second mounting wall 122 surrounds the second engagement surface 1210. The first engagement surface 110 and the second engagement surface 1210 are engaged. At least one of the first engagement surface 110 and the second engagement surface 1210 is finished using a finish machining process. Thus, the sealing effect is better. The second engagement surface 1210 includes a second connection engagement surface 12101, a second channel engagement surface 12102, and a third connection engagement surface 12103. The end surface of the first mounting wall 112 is engaged with the second connection engagement surface 12101.

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 face of the first mounting wall 112 may be finished, or the portion of the top face of the bottom wall 121 that is in contact with the first mounting wall 112 may be finished, or both the end face of the first mounting wall 112 and the portion of the top face of the bottom wall 121 that is in contact with the first mounting wall 112 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 injection passage 101. This facilitates the shaping of the injection passage 101.

The second channel portion 123 is formed with second channel engagement surfaces 12102 located on both sides of the second groove 1231. The first channel engagement surface 1101 and the second channel engagement surface 12102 are engaged. At least one of the first channel engagement surface 1101 and the second channel engagement surface 12102 is treated using a finish machining process. The second passage portion 123 is formed with a third connection engagement surface 12103. The first connection engagement surface 1102 and the third connection engagement surface 12103 are engaged. The second and third connection interfaces 12101 and 12103 surround the bottom wall connection slot 1211. The second connection interface 12101, the second channel interface 12102, and the third connection interface 12103 are coplanar.

Referring to fig. 11-21, the primary air cavity 13 is provided with a primary air cavity 131 communicating with the injection passage 101. The side wall of the primary air chamber 131 is provided with a chamber through hole 132 communicating with the primary air chamber 131. 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 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/or the openings 1331. Wherein the planar shape of the ring 133 is arc-shaped.

For ease of installation and positioning, the ring 133 is provided with a first positioning hole 1332 (as shown in fig. 17). The top wall of the cavity body 134 is convexly provided with a positioning post 1341 (shown in fig. 14). The positioning posts 1341 are fixed in the first positioning holes 1332 to perform positioning and fixing functions in the process of combining the bottom cup cover 11 and the bottom cup base 12.

The side wall of the primary air cavity 13 is outwardly convex with a second positioning structure 135 (shown in fig. 12). The second positioning structure 135 includes a first support plate 1351 and a second support plate 1352. 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 block or open the cavity through hole 132. Because the nozzle holder 20 is detachable, different nozzle holders 20 can be matched for the burner 100 according to the requirements of upper air intake and lower air intake, when the nozzle holder 20 shields the cavity through hole 132, the burner 100 can be designed as an upper air intake burner, and when the nozzle holder 20 opens the cavity through hole 132, the burner 100 can be designed as a lower air intake burner, or an upper air intake burner and a lower air intake burner. Therefore, the air intake mode of the burner 100 can be flexible and changeable under the condition of low cost, and is suitable for different use environments. It should be noted that the nozzle holder 20 may be manufactured by a loose core process.

Referring to fig. 22 and 23, the nozzle holder 20 includes an air intake portion 21, a baffle 22, a third positioning structure 23 (corresponding to a first positioning structure in the claims), and a mounting plate 24. The air inlet part 21 is provided with a channel, and the air outlet end of the channel is provided with a nozzle. 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 obscures or opens the cavity through-hole 132. When the shutter 22 shields the cavity through-hole 132, the shutter 22 fills the cavity through-hole 132. This facilitates shielding or opening of the cavity through-hole 132. The second locating formation 135 is connected to the third locating formation 23 and together defines the position of the nozzle holder 20 on the base cup 10 from different at least two directions to secure the nozzle holder 20 so that the nozzle is coaxial with the injection passage 101 and for ease of installation and foolproof. In this way, the injection channel 101 is facilitated to inject the fuel gas by the nozzle, and the air flow speed of the air inlet of the 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 perpendicular to each other.

It will be appreciated that in other embodiments, the baffle may also directly cover the outer surface of the side wall of the primary air chamber 131, such that the baffle may also be implemented to block the chamber through-hole 132. In addition, in other embodiments, the nozzle holder may omit the baffle, or may implement a burner with lower intake air, in which case it is also understood that the height of the baffle is zero.

Referring to fig. 3 and 7, in order to make the overall structure of the burner 100 more compact by fully utilizing the installation space, the air inlet portion 21 is provided with a first passage 211 and a second passage 212 which are sequentially communicated in the air inlet direction e (as shown in fig. 7) of the nozzle holder 20. The first passage 211 has a first intake center axis z along the intake direction of the intake portion 21. The second passage 212 has a second intake center axis g along the intake direction of the intake portion 21. The first intake center axis z and the second intake center axis g are offset in the thickness direction of the burner 100. The thickness direction of the burner 100 is the up-down direction in fig. 7. The first channel 211 and the second channel 212 may have a regular column shape, such as a cylinder shape or an elliptic cylinder shape. In addition, the first and second passages 211 and 212 may be formed by a mold, so that concentricity of each passage can be ensured. It should be noted that, because the airflow in the air inlet portion 21 is substantially static, the resistance of the airflow passing through the second passage 212 from the first passage 211 is small. Wherein the primary air chamber 131 communicates with the second channel 212. In addition, a first nozzle (not shown) may be mounted at the outlet end of the second passage 212 such that the first nozzle is coaxially opposed to the injection passage 101.

Specifically, in the present embodiment, the intake portion 21 includes a first intake pipe 213 and a second intake pipe 214. The first air inlet pipe 213 opens the first passage 211. The second air inlet pipe 214 is provided with a second channel 212. The first intake pipe 213 and the second intake pipe 214 are thus disposed offset in the thickness direction of the combustor 100. This allows the first air inlet duct 213 to be disposed downward with respect to the second air inlet duct 214 to leave an upper space of the nozzle holder 20, so that there is enough space for placing the panel.

The first passage 211 is closer to the intake end of the intake portion 21 than the second passage 212. The cross-sectional dimension of the first channel 211 is larger than the cross-sectional dimension of the second channel 212. For example, if the first channel 211 and the second channel 212 are circular, the radius of the first channel 211 is greater than the radius of the second channel 212; if the first and second channels 211, 212 are square, the cross-sectional area of the first channel 211 is greater than the cross-sectional area of the second channel 212. The cross section is a section taken perpendicular to the intake direction e.

The air intake portion 21 is formed with a first positioning surface 210 (as shown in fig. 23). The bottom surface of the mounting plate 24 is formed with a second positioning surface 241. The first positioning surface 210 and the second positioning surface 241 constitute the third positioning structure 23. The side of the first support plate 1351 engages the first positioning surface 210. The top surface of the second support plate 1352 is engaged with the second positioning surface 241. The first positioning surface 210 may be one positioning surface of a step structure formed by eccentric arrangement of the first air inlet pipe 213 and the second air inlet pipe 214.

Referring to fig. 21-23, the number of mounting plates 24 is two in order to further enhance the stability of the mounting of the nozzle holder 20. Two mounting plates 24 are provided on opposite sides of the air intake portion 21, respectively. 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 can support the second air inlet pipe 214. That is, the second air inlet pipe 214 may be supported and positioned by the first support plate 1351.

The mounting plate 24 is provided with a second mounting groove 242 (corresponding to the mounting groove in the claims). The second mounting groove 242 is aligned with the second mounting hole 1353 of the second support plate 1352. The second mounting groove 242 and the second mounting hole 1353 are provided for fixing a fixing member (not shown) for fixing the nozzle holder 20 and the base cup 10. The second mounting groove 242 may be a U-shaped groove.

Referring to fig. 1 and 24-26, a flame arrester 30 is mounted to 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. When the liquid bearing disc is fixed, the fastener can be penetrated through the second positioning holes 1103 (shown in fig. 11) of the liquid bearing disc and the bottom cup cover body 11 and fixed in the fixing holes 1201 (shown in fig. 19) of the bottom cup base body 12 to simultaneously fix the liquid bearing disc, the bottom cup cover body 11 and the bottom cup base body 12, and at the moment, the positions of the positioning points of the bottom cup cover body 11 and the liquid bearing disc are consistent with the positions of the positioning points of the bottom cup cover body 11 and the bottom cup base body 12, so that the reliability of integral sealing can be ensured, and the hole site procedures and the assembly procedures are reduced, so that the integral efficiency is improved. In one example, the flame thrower may be made of cast aluminum.

The flame thrower 30 is formed with a gas mixing chamber 31 and a flame hole 32 communicating with the gas mixing chamber 31. The air outlet 114 communicates with the injection passage 101 and the gas mixing chamber 31. The torch 30 has a third center k (a broken line m3 in fig. 4 is a central axis where the third center k is located). The first center x is disposed eccentrically to the third center k. The third center k of the flame thrower 30 is eccentrically arranged with the first center x of the bottom cup 10, so that the bottom cup 10 can have more space to set the injection channel 101 longer, so that the injection channel 101 has larger injection capacity, 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 fuel gas mixing cavity 31 can be ensured, and the combustion stability of the burner 100 is 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. When the outer ring air outlet 1141 is in the circular arc shape, the center of the plane in which the outer ring air outlet 1141 is located overlaps the third center k of the flame thrower 30, so that the flow resistance of the mixed gas entering the flame thrower 30 from the outer ring air outlet 1141 is small.

Referring to fig. 9, a pressure relief cavity 303 is formed in the bottom cup 10. The gas and air mixture passage 39 and the pressure release chamber 303, which are formed by the connecting passage 102 and the injection passage 101, are located on both sides of the joint 381 between the first joint surface 110 and the second joint surface 1210. The bottom cup cover 11 is provided with a pressure relief opening 3031 communicated with the pressure relief cavity 303. The air outlet 114 is spaced from the pressure relief port 3031. Because the mixed gas channel 39 and the pressure release cavity 303 are located at two sides of the joint 381 of the first joint surface 110 and the second joint surface 1210, after the mixed gas of the mixed gas channel 39 leaks to the pressure release cavity 303 through the joint 381, the mixed gas can leak to the upper side of the bottom cup 10 through the pressure release port 3031 and can be burnt and consumed by the flame thrower 30 above the bottom cup 10, so that accidents caused by gas leakage of the bottom cup 10 are avoided or reduced. At the same time, the provision of the pressure relief cavity 303 also reduces the overall weight of the bottom cup 10. For easy installation and cleaning, the first channel portion 113 is provided with a pressure release chamber 303, that is, the upper surface of the bottom cup cover 11 is a flat plane. Pressure relief cavity 303 is spaced from first groove 1131.

In order to increase the area of the fire hole 32 and improve the injection capacity of the fire hole 32, the root of the fire hole 32 is arc-shaped, so that the processing is also convenient. Specifically, the root of the fire hole 32 is circular arc-shaped. The flame arrester 30 includes a sidewall 301 (shown in fig. 1) that encloses a gas mixing chamber 31. A plurality of spaced fire holes 32 are formed in the side face of the side wall 301, and a fire groove 302 is formed in the top face of the side wall 301 between two adjacent fire holes 32. The fire groove 302 communicates the gas mixing chamber 31 with the adjacent two fire holes 32. Further, when the flame groove 302 is provided in a T shape, the flame propagation stability of the flame thrower 30 is improved. The specific structure of the flame thrower 30 will be further described below.

The torch 30 comprises an outer annular cavity 33, an inner annular cavity 34, two first connecting portions 35, a second connecting portion 36 and a flow guiding surface 37. The outer annular cavity 33 is spaced around the inner annular cavity 34. The gas mixing chamber 31 includes an outer gas mixing chamber 311 and an inner gas mixing chamber 312. The outer ring cavity 33 is provided with an outer gas mixing chamber 311. The inner annular cavity 34 defines an inner gas mixing chamber 312. The fire holes 32 include an outer ring fire hole 321 and an inner ring fire hole 322. The outer ring fire holes 321 surround the inner ring fire holes 322. The outer ring flame holes 321 communicate with the outer gas mixing chamber 311. The inner ring flame holes 322 communicate with the internal combustion gas mixing chamber 312.

Both the outer gas mixing chamber 311 and the inner gas mixing chamber 312 are supplied with air from a single injection passage 101. Referring to fig. 10, the burner 100 is provided with a second secondary air passage 341 penetrating the middle of the inner annular chamber 34. The second secondary air passage 341 communicates with the first secondary air passage 115. Thus, the secondary air intake capability can be ensured. The outer gas mixing chamber 311 is communicated with the outer ring gas outlet 1141 and the outer ring fire hole 321. The inner gas mixing chamber 312 communicates with the inner ring gas outlet 1142 and the inner ring fire hole 322.

In the case of intake, referring to fig. 7-10, the fuel gas may sequentially enter the first channel 211 and the second channel 212 of the intake portion 21 (as indicated by the dashed arrows in fig. 7, which indicate the direction of gas flow). The fuel gas may then be injected from the first nozzle to the primary air chamber 131. At the same time, ambient air may enter the primary air chamber 131 via the chamber through-holes 132 and/or the openings 1331 and mix with the fuel gas within the primary air chamber 131. The mixed gas obtained by mixing the fuel gas and the air enters the injection channel 101, and is injected to the first connecting channel 1021 and the second connecting channel 1022 respectively through the injection channel 101. Then, the mixture gas exiting from the first connecting passage 1021 enters the outer gas mixing chamber 311 through the outer ring gas outlet 1141 for combustion, so as to form an outer ring flame at the outer ring flame holes 321. The mixture exiting the second connecting passage 1022 enters the internal combustion gas mixing chamber 312 via the internal ring gas outlet 1142 for combustion to form an internal ring flame at the internal ring flame holes 322. Ambient air may be admitted by the first and second secondary air passages 115, 341 to replenish the air.

To facilitate installation of the torch 30, a fourth locating structure 342 is formed in the middle of the bottom of the inner annular cavity 34. One of the first positioning structure 1151 and the fourth positioning structure 342 is provided with a positioning slot 343. The other of the first positioning structure 1151 and the fourth positioning structure 342 is formed with a positioning block 344. The positioning block 344 is inserted into the positioning groove 343. In order to improve the stability of the installation, the shape of the positioning block 344 is identical to that of the positioning groove 343, and the positioning block 344 has a plate shape with different thickness. The first positioning structure 1151 is provided with a positioning slot 343 (as shown in fig. 16), and the fourth positioning structure 342 is formed with a positioning block 344 (as shown in fig. 26). In the embodiment of the present invention, the number of the positioning grooves 343 and the positioning blocks 344 is 1.

The first connecting portion 35 connects the outer ring cavity 33 and the inner ring cavity 34. Each first connection portion 35 is provided with a torch connection channel 351. The flame arrester connection channel 351 communicates with the outer ring air outlet 1141, the inner ring air outlet 1142, and the gas mixing chamber 31. In the example of fig. 26, the positioning block 344 connects the two first connection portions 35. Specifically, the positioning block 344 is connected between the two first connection portions 35. Each first connecting portion 35 includes one end opposite to the other first connecting portion 35, and the positioning block 344 is connected to opposite ends of the two first connecting portions 35.

The second connecting portion 36 connects the outer ring cavity 33 and the inner ring cavity 34. The flow guiding surface 37 is located at the bottom surface of the second connecting portion 36 and the bottom surface of the inner ring cavity 34. The flow guide surface 37 is inclined upward from the outside of the flame thrower 30 to the second secondary air passage 341 in the inner direction. The guide surface 37 is inclined upward from the outside of the flame thrower 30 to the second secondary air passage 341 to guide the secondary air to flow to the second secondary air passage 341 to supplement sufficient air to the inner ring flame, ensuring the thermal stability of the combustion of the burner 100.

The number of the second connection parts 36 is plural. The plurality of second connecting portions 36 are disposed at uniform intervals along the circumferential direction of the inner ring cavity 34. A plurality of guide surfaces 37 are formed on the bottom surfaces of the plurality of second connection portions 36 and the bottom surface of the inner ring cavity 34. The plurality of guide surfaces 37 are disposed at uniform intervals along the circumferential direction of the inner ring cavity 34. In the example of the present embodiment, the second connection portion 36 and the flow guide surface 37 are two. In other embodiments, the number of the second connecting portions 36 and the flow guide surfaces 37 may be two or more.

In addition, the flame arrester 30 comprises a baffle 38. The flap 38 at least partially shields the pressure relief vent 3031 from the space. Thus, the pressure relief port 3031 can be prevented from being blocked by the scattered sundries. In the example of fig. 24, the flap 38 is attached inside the outer ring cavity 33. Further, the blocking piece 38 connects the first connection portion 35 and the inner side of the outer ring cavity 33, so that deformation of the blocking piece 38 due to high temperature can be prevented when the burner 100 is operated.

The fire cover 40 includes an outer ring fire cover 41 and an inner ring fire cover 42. The outer ring fire cover 41 is provided on the outer ring cavity 33. An inner ring fire cover 42 is provided over the inner ring cavity 34. 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 provided with an inner ring fire cover through hole 421. The inner ring fire cover through hole 421 communicates with the second secondary air passage 341.

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. A burner, comprising:

the nozzle seat comprises a third positioning structure, a channel is formed in the nozzle seat, and the air outlet end of the channel is used for installing a nozzle;

the bottom cup is internally provided with an injection channel with a Venturi effect, the bottom cup is provided with a primary air cavity, the primary air cavity is communicated with the channel and the injection channel, the side wall of the primary air cavity is outwards protruded to be provided with a second positioning structure, and the third 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 so that the nozzle and the injection channel are coaxial;

the nozzle seat comprises an air inlet part and a mounting plate, the air inlet part is provided with the channel, the mounting plate is arranged on the air inlet part, the air inlet part is provided with a first positioning surface, the bottom surface of the mounting plate is provided with a second positioning surface, the first positioning surface and the second positioning surface form the third positioning structure, the second positioning structure comprises a first supporting plate and a second supporting plate, the side surface of the first supporting plate is jointed with the first positioning surface, and the top surface of the second supporting plate is jointed with the second positioning surface;

The nozzle seat is detachably arranged on the side wall of the primary air cavity, a cavity through hole communicated with the primary air cavity is formed in the side wall of the primary air cavity, and the nozzle seat is positioned at the cavity through hole and is configured to block or open the cavity through hole;

the nozzle seat comprises an air inlet part and a baffle plate convexly arranged on the air inlet part, the air inlet part is provided with the channel, and the height of the baffle plate is adjustable so that the baffle plate can shield or open the cavity through hole;

when the nozzle seat shields the cavity through hole, the burner is designed into an upper air inlet burner, and when the nozzle seat is opened, the burner is designed into a lower air inlet burner or an upper and lower air inlet burner, and the nozzle seat is manufactured by adopting a core pulling process.

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

3. 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 air inlet portion, the number of the second support plates is two, and the first support plate is connected with the two second support plates.

4. The burner of claim 1, wherein the mounting plate defines a mounting slot, the second support plate defines a mounting hole in corresponding communication with the mounting slot, and the mounting slot and the mounting hole are configured for securing the nozzle holder and the bottom cup by a securing member.

5. The burner of claim 1, wherein the channel comprises a first channel and a second channel, the first channel having a first intake center axis along an intake direction of the nozzle holder, the second channel having a second intake center axis along an intake direction of the nozzle holder, the first intake center axis and the second intake center axis being offset in a thickness direction of the burner.

6. The burner of claim 5, wherein the first passage is closer to the inlet end of the nozzle holder than the second passage, the first passage having a cross-sectional dimension that is greater than a cross-sectional dimension of the second passage.

7. The burner of claim 1, wherein the baffle fills the cavity through-hole when the baffle obscures the cavity through-hole.

8. A gas hob, characterized in, that it comprises a burner according to any one of the claims 1-7.