CN113432147A

CN113432147A - Ignition device and combustor provided with same

Info

Publication number: CN113432147A
Application number: CN202110799661.5A
Authority: CN
Inventors: 王光汉; 刘书兴; 林玉绵; 孙帅; 温汉杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-09-24

Abstract

The invention relates to an ignition device and a burner provided with the same, wherein the ignition device is matched and connected with a furnace head, the ignition device comprises a bracket, an ignition needle and a pressing piece, the bracket is provided with an assembly hole, the ignition needle penetrates through the assembly hole, the ignition needle is assembled and fixed in the pressing piece, and the pressing piece is elastically pressed between the hole wall of the assembly hole and the ignition needle and is constructed to provide a limiting holding force for the ignition needle. The ignition device and the combustor with the ignition device have high assembly efficiency.

Description

Ignition device and combustor provided with same

Technical Field

The invention relates to the technical field of household appliances, in particular to an ignition device and a burner with the same.

Background

With the development of the technical field of household appliances, the burner provided with the ignition device is popular due to the characteristics of being convenient to use and is widely applied to the life of people. Traditional ignition includes ignition needle, spring, jump ring and support usually, carries out the in-process of assembling at ignition, needs to use spring and jump ring simultaneously to fix the ignition needle on the support, so, leads to ignition's assembly comparatively troublesome, and assembly efficiency is low.

Disclosure of Invention

In view of the above, it is desirable to provide an ignition device capable of improving assembly efficiency and a burner provided with the ignition device, in order to solve the problem of low assembly efficiency.

The ignition device is connected to the furnace head in a matching mode, and the ignition device is characterized by comprising:

the bracket is provided with an assembling hole;

the ignition needle penetrates through the assembly hole; and

the ignition needle is assembled and fixed in the pressing piece;

the pressing piece is elastically pressed between the hole wall of the assembly hole and the ignition needle and is configured to provide limiting and retaining force for the ignition needle.

In one embodiment, the pressing piece has a natural state and a contraction state;

when the pressing piece is in the natural state, the maximum size of the pressing piece in the radial direction of the assembly hole is larger than the aperture of the assembly hole;

when the ignition needle is in the contraction state, the pressing piece is pressed and contracted into the assembly hole and is pressed between the hole wall of the assembly hole and the ignition needle.

In one embodiment, the pressing member includes a body and an elastic portion, and the ignition needle is fixed in the body in a limited manner;

when the pressing piece is in the natural state, the maximum size of the pressing piece at the position of the elastic part in the radial direction of the assembly hole is larger than the aperture of the assembly hole;

when the ignition needle is in the contraction state, the elastic part is pressed to contract into the assembly hole and is pressed between the hole wall of the assembly hole and the ignition needle.

In one embodiment, in the natural state, the pressing member at the position of the elastic portion has a size in the radial direction of the fitting hole that gradually decreases in the fitting direction of the ignition needle.

In one embodiment, the elastic part comprises a first elastic part and a second elastic part which are sequentially arranged along the assembling direction of the ignition needle and are connected with each other;

when the ignition needle is in the natural state, the pressing piece at the position of the first elastic part is gradually increased in the radial direction of the assembly hole along the assembly direction of the ignition needle, the pressing piece at the position of the second elastic part is gradually decreased in the radial direction of the assembly hole along the assembly direction, and the pressing piece at the position of the connection position of the first elastic part and the second elastic part has the maximum size in the radial direction of the assembly hole.

In one embodiment, the pressing element further includes a first transition portion and a second transition portion, the first transition portion is connected to an end of the first elastic portion away from the second elastic portion, the second transition portion is connected to an end of the second elastic portion away from the first elastic portion, and both the first transition portion and the second transition portion have a size in a radial direction of the assembly hole smaller than an aperture of the assembly hole.

In one embodiment, the body is provided with a clamping channel penetrating through the body along the assembling direction of the ignition needle, and the ignition needle is assembled and fixed in the clamping channel.

In one embodiment, the body is provided with mounting openings extending to two opposite end edges of the body, and the mounting openings are communicated with the clamping channel.

In one embodiment, the body is provided with elastic reinforcing ports which are arranged along the circumferential direction and distributed on two sides of the elastic part, and each elastic reinforcing port is communicated with the clamping channel.

In one embodiment, the ignition needle comprises an ignition main body, a first stopping portion and a second stopping portion, and the first stopping portion and the second stopping portion are both coupled to the ignition main body and sequentially arranged at intervals along the assembling direction of the ignition needle;

the ignition main body is assembled and fixed in the pressing piece, and the pressing piece is stopped between the first stopping part and the second stopping part.

A burner, comprising:

a furnace end; and

the ignition device according to any one of the above embodiments, wherein the ignition device is coupled to the furnace head.

Above-mentioned ignition and be equipped with its combustor supports and presses between the pore wall of pilot hole and ignition needle through only setting up the piece elasticity that supports to be constructed and be used for providing spacing holding power to the ignition needle, alright realize the fixed of ignition needle and support, compare in prior art and use jump ring and spring to fix the mode of ignition needle and support, the assembly mode is simpler and assembly efficiency is higher.

Drawings

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

FIG. 2 is an exploded view of the burner shown in FIG. 1;

FIG. 3 is a cross-sectional view of the burner shown in FIG. 1;

FIG. 4 is a schematic view of the burner head, the ignition device, the outer ring injection pipe and the inner ring injection pipe of the burner shown in FIG. 1;

FIG. 5 is an exploded view of the burner shown in FIG. 4;

FIG. 6 is a bottom view of the burner head of the burner shown in FIG. 4;

FIG. 7 is a schematic structural view of an ignition device in the burner shown in FIG. 4;

FIG. 8 is an exploded view of the ignition device shown in FIG. 7;

FIG. 9 is a schematic view of the structure of the bracket of the ignition device shown in FIG. 7;

fig. 10 is a schematic view showing the structure of the pressing member in the ignition device shown in fig. 7.

Description of the drawings:

100. a burner; 10. an ignition device; 11. a support; 111. an assembly hole; 112. a first surface; 114. mounting holes; 115. a fixing hole; 116. a stent body; 117. a limiting part; 1172. a groove; 1174. connecting holes; 118. an assembling portion; 12. an ignition needle; 121. an ignition body; 122. a first stopper portion; 123. a second stopper portion; 124. a third stopper portion; 13. a pressing member; 130. a body; 131. an elastic portion; 1312. a first elastic part; 1314. a second elastic part; 132. a first transition portion; 133. a second transition portion; 134. clamping the channel; 135. an installation opening; 136. an elasticity enhancing port; 20. a furnace end; 21. a premix chamber; 212. an inner ring premix chamber; 214. an outer ring premix chamber; 22. a furnace end central cavity; 23. a boss; 30. a fire separating plate; 31. a fire-dividing central cavity; 32. an inner fire division cavity; 33. an outer fire dividing cavity; 40. an outer ring cover; 41. an outer ring central cavity; 42. an outer ring cavity; 43. an outer ring air outlet hole; 50. an inner ring cover; 51. an inner ring central cavity; 52. an inner ring cavity; 53. an inner ring air outlet hole; 60. an inner ring injection pipe; 70. an outer ring injection pipe; 80. a fixing member; 90. a thermocouple; 101. a connecting member.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "inner ring," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 3 and fig. 5 together, the present application provides a burner 100 capable of being applied to a gas stove, the burner 100 includes an ignition device 10, a burner 20, a fire distribution plate 30, an outer annular cover 40, an inner annular cover 50, an inner annular injection pipe 60 and an outer annular injection pipe 70, the burner 20, the fire distribution plate 30 and the outer annular cover 40 are sequentially stacked in a mounting direction, the inner annular cover 50 penetrates through the middle of the outer annular cover 40 in an assembly direction opposite to the mounting direction and abuts against the fire distribution plate 30, the ignition device 10 is coupled to the burner 20 and penetrates through the burner 20, the fire distribution plate 30 and the middle of the inner annular cover 50 in the mounting direction, and the inner annular injection pipe 60 and the outer annular injection pipe 70 are coupled to the burner 20.

Referring to fig. 2 and fig. 4, in detail, the burner 20 has a premixing cavity 21 and a burner central cavity 22, the premixing cavity 21 includes an inner annular premixing cavity 212 and an outer annular premixing cavity 214, and the inner annular premixing cavity 212 and the outer annular premixing cavity 214 are sequentially arranged along the circumference of the burner central cavity 22. The inner ring injection pipe 60 and the outer ring injection pipe 70 are both connected to the burner 20, the inner ring injection pipe 60 is used for injecting inner ring gas into the inner ring premixing chamber 212, and the outer ring injection pipe 70 is used for injecting outer ring gas into the outer ring premixing chamber 214. The fire distribution plate 30 is provided with a fire distribution central cavity 31, an inner fire distribution cavity 32 and an outer fire distribution cavity 33, the fire distribution central cavity 31, the inner fire distribution cavity 32 and the outer fire distribution cavity 33 are arranged at intervals along the radial direction of the fire distribution plate 30, and the inner fire distribution cavity 32 and the outer fire distribution cavity 33 are arranged around the circumference of the fire distribution central cavity 31. The outer ring cover 40 is provided with an outer ring central cavity 41 and an outer ring cavity 42, the outer ring cavity 42 is arranged around the circumference of the outer ring central cavity 41, the outer ring cover 40 is further provided with an outer ring air outlet hole 43 communicated between the outside and the outer ring cavity 42, the inner ring cover 50 is provided with an inner ring central cavity 51, an inner ring cavity 52 and an inner ring air outlet hole 53, the inner ring cavity 52 is arranged around the circumference of the inner ring central cavity 51, and the inner ring air outlet hole 53 is communicated between the outside and the inner ring cavity 52.

The inner ring cover 50 is arranged in the outer ring central cavity 41 of the outer ring cover 40 in a penetrating manner, and the burner central cavity 22, the fire dividing central cavity 31 and the inner ring central cavity 51 are sequentially communicated along the mounting direction to form a mounting channel which can allow the ignition device 10 to penetrate; the inner ring premixing cavity 212, the inner fire division cavity 32, the inner ring cavity 52 and the inner ring air outlet 53 are communicated in sequence to form an inner ring flow channel for circulation of inner ring gas; the outer ring premixing cavity 214, the outer fire distributing cavity 33, the outer ring cavity 42 and the outer ring air outlet hole 43 are communicated in sequence to form an outer ring flow channel for circulation of outer ring gas. The ignition device 10 is sequentially disposed through the burner central cavity 22, the fire distribution central cavity 31 and the inner ring central cavity 51 along the installation direction, and is configured to output a high-voltage arc to ignite the inner ring gas ejected from the inner ring gas outlet 53 and the outer ring gas ejected from the outer ring gas outlet 43, so that the burner 100 can normally operate.

It is understood that the angle between the assembling direction and the mounting direction is 180 °, and the following embodiments are described by taking the case where the burner 100 is horizontally disposed, the mounting direction is the vertically upward direction, and the assembling direction is the vertically downward direction.

Referring to fig. 7, 8 and 9, the ignition device 10 includes a bracket 11, an ignition needle 12 and a pressing member 13, the bracket 11 is provided with an assembly hole 111 penetrating through the bracket 11 along an assembly direction, the ignition needle 12 penetrates through the assembly hole 111 along the assembly direction and is assembled and fixed in the pressing member 13, wherein the pressing member 13 elastically presses between a hole wall of the assembly hole 111 and the ignition needle 12 and is configured to provide a limit holding force for the ignition needle 12. Specifically, the fitting direction coincides or substantially coincides with the central axis direction of the fitting hole 111, and the pressing member 13 presses between the hole wall of the fitting hole 111 and the ignition needle 12 in the radial direction of the fitting hole 111.

Specifically, the ignition needle 12 includes an ignition main body 121, a first stopping portion 122, a second stopping portion 123 and a third stopping portion 124, the ignition main body 121 extends along the assembly direction, and the first stopping portion 122, the second stopping portion 123 and the third stopping portion 124 are all coupled to the ignition main body 121 and are sequentially arranged at intervals along the assembly direction. The first stopper portion 122 has a size larger than the diameter of the fitting hole 111 in the radial direction of the fitting hole 111, and the second stopper portion 123 and the third stopper portion 124 each have a size smaller than the diameter of the fitting hole 111 in the radial direction of the fitting hole 111.

In the conventional burner 100, the ignition device 10 further includes a spring and a clamp spring, the spring is sleeved on a portion of the ignition main body 121 located between the first stopper portion 122 and the second stopper portion 123, and the clamp spring is clamped on a portion of the ignition main body 121 located between the second stopper portion 123 and the third stopper portion 124. The bracket 11 has a first surface 112 and a second surface sequentially arranged along the assembling direction, the first surface 112 is located above the second surface, and the assembling hole 111 penetrates through the first surface 112 and the second surface. During installation, the ignition needle 12 penetrates through the assembly hole 111 from the assembly direction, the first stopping portion 122 is disposed on one side of the bracket 11 where the first surface 112 is disposed and abuts against the first surface 112, the second stopping portion 123, the third stopping portion 124 and the spring are equally distributed on one side of the bracket 11 where the second surface is disposed, the spring abuts between the second surface and the surface of the second stopping portion 123 back to the third stopping portion 124, and one end of the spring abutting against the second stopping portion 123 is further supported at one end of the clamp spring away from the third stopping portion 124. During this installation, the spring is in a contracted state, and the spring is used for providing an elastic force for driving the ignition needle 12 to move along the assembling direction for the ignition needle 12, and since the first stopping portion 122 is stopped at the first surface 112, the elastic force of the spring and the stopping force of the first stopping portion 122 are balanced with each other, so that the ignition body 121 can be prevented from moving, and the ignition needle 12 can be stably fixed on the bracket 11. The use of the spring and the snap spring increases the number of parts for assembling the ignition needle 12, makes the assembly more complicated, and reduces the assembly efficiency of the whole ignition device 10.

In the present application, however, the ignition needle 12 is fixed only by providing the pressing member 13, and the pressing member 13 elastically presses between the hole wall of the fitting hole 111 and the ignition needle 12 and is configured to provide a spacing holding force to the ignition needle 12. In this way, not only are fewer parts used, but also the assembly method is simpler, so that the assembly efficiency of the ignition device 10 can be effectively improved.

The ignition needle 12 is assembled and fixed in the pressing member 13, and the pressing member 13 and the ignition needle 12 slide in the assembling direction under the action of an external force (manual force or external driving force). In the process, the pressing member 13 is compressed and enters the fitting hole 111, and elastically presses between the hole wall of the fitting hole 111 and the ignition needle 12.

Specifically, the length of the pressing member 13 in the assembling direction is equal to the distance between the first stopper portion 122 and the second stopper portion 123, and two opposite ends of the pressing member 13 are respectively abutted against the first stopper portion 122 and the second stopper portion 123. The ignition body 121 is assembled and fixed in the pressing member 13, and the pressing member 13 is stopped between the first stopping portion 122 and the second stopping portion 123. Therefore, relative sliding between the pressing member 13 and the ignition body 121 in the assembling direction or the mounting direction can be prevented, so that the pressing member 13 and the ignition needle 12 have good mounting reliability.

Referring to fig. 7 again, and also referring to fig. 10, the pressing member 13 has a natural state and a contracted state; in a natural state, the maximum dimension of the pressing member 13 in the radial direction of the fitting hole 111 is larger than the aperture of the fitting hole 111; in the contracted state, the pressing member 13 is pressed and contracted into the fitting hole 111, and is pressed between the hole wall of the fitting hole 111 and the ignition needle 12.

Specifically, the radial direction of the assembly hole 111 (the axial direction coinciding with the assembly direction) is defined, and a plurality of reference planes are provided, each reference plane has a plurality of radial lines of the assembly hole 111 therein, each radial line in each reference plane simultaneously passes through the pressing part 13 and intersects with the pressing part 13 at two different points, wherein the distance between two intersection points of the same radial line and the pressing part 13 is the radial distance, and in each reference plane, a plurality of radial lines intersect with the pressing part 13 to form a plurality of radial distances, wherein the radial distance with the largest distance value is the size of the pressing part 13 in the radial direction of the assembly hole. The radial spacing with the largest spacing value is defined as the maximum radial spacing, and each reference plane has a radial line intersecting the press-against part 13 and forming the maximum radial spacing. The maximum dimension of the pressing member 13 in the radial direction of the fitting hole 111 means the maximum value among a plurality of maximum radial pitches arranged in sequence in the fitting direction of the ignition needle 12. The maximum dimension of the pressing member 13 in the radial direction of the fitting hole 111 is larger than the aperture of the fitting hole 111, and therefore, in the process of operating the ignition needle 12 to be inserted into the fitting hole 111, the pressing member 13 can be ensured to be pressed and contracted, and the reliability of the installation of the ignition needle 13 can be ensured.

Further, the pressing member 13 includes a body 130 and an elastic portion 131, and the ignition needle 12 is fixed in the body 130 in a limited manner; when in a natural state, the maximum size of the pressing member 13 at the position of the elastic part 131 in the radial direction of the assembly hole 111 is larger than the aperture of the assembly hole 111; in the contracted state, the elastic portion 131 is pressed and contracted into the fitting hole 111, and is pressed between the hole wall of the fitting hole 111 and the ignition needle 12. Alternatively, the body 130 may be a rigid component or an elastic component, and preferably, the body 130 and the elastic portion 131 are both elastic components and are integrally formed.

Specifically, each reference plane has a plurality of radial lines of the assembly hole 111, each radial line in each reference plane simultaneously passes through the body 130 and the elastic portion 131 and intersects the body 130 and the elastic portion 131 at two different points, wherein the distance between the same radial line and the intersection point of the body 130 and the elastic portion 131 is a radial distance, and in each reference plane, the plurality of radial lines intersect the body 130 and the elastic portion 131 to form a plurality of radial distances, wherein the radial distance with the largest distance value is the radial dimension of the pressing member 13 at the position of the elastic portion 131. The radial distance with the largest distance value is defined as the maximum radial distance, and each reference plane has a radial line intersecting the body 130 and the elastic part 131 to form the maximum radial distance. The maximum dimension of the pressing member 13 at the position of the elastic portion 131 in the radial direction of the fitting hole 111 means the maximum value among a plurality of maximum radial pitches sequentially arranged in the fitting direction of the ignition needle 12. The maximum size of the pressing member 13 at the position of the elastic part 131 in the radial direction of the fitting hole 111 is larger than the aperture of the fitting hole 111, so that when the ignition needle 12 is operated to penetrate through the fitting hole 111, the elastic part 131 can be ensured to be pressed and contracted, and the reliability of the installation of the ignition needle 13 can be ensured. Moreover, in the process that the ignition needle 12 slides along the assembling direction and penetrates through the assembling hole 111, the elastic part 131 can be contracted into the assembling hole 111 under the extrusion of a user or the extrusion of the opening edge of the assembling hole 111 and is pressed between the hole wall of the assembling hole 111 and the ignition needle 12, so that the mounting firmness of the ignition needle 12 can be guaranteed, and meanwhile, the assembling efficiency and the assembling simplicity are high. When the ignition needle 12 needs to be disassembled, the ignition needle 12 and the pressing piece 13 are pulled out reversely along the installation direction.

Note that, before the first stopper 122 abuts against the first surface 112, the body 130 and the elastic portion 131 always slide in the assembling direction following the ignition needle 12. When the first stopping portion 122 abuts against the first surface 112, the ignition needle 12, the body 130 and the elastic portion 131 all stop sliding, and at this time, the body 130 and the elastic portion 131 may be completely located in the mounting hole 111 or partially located in the mounting hole 111. In addition, in the process that the ignition needle 12 drives the body 130 and the elastic part 131 to slide along the assembling direction or the mounting direction, the part of the elastic part 131 located in the assembling hole 111 is always pressed between the hole wall of the assembling hole 111 and the ignition needle 12.

Further, in the natural state, the pressing member 13 at the position of the elastic portion 131 has a size in the radial direction of the fitting hole 111 that gradually decreases in the fitting direction of the ignition needle 12. The dimension in the radial direction of the mounting opening 111 decreases gradually in the mounting direction of the ignition needle 12, and can be expressed as: the maximum radial distances, which are arranged one after the other in the mounting direction of the ignition needle 12, decrease gradually in the mounting direction of the ignition needle 12. Therefore, in the process that the pressing member 13 slides in the assembling direction and is switched from the natural state to the contracted state, as the portion of the elastic portion 131 entering the assembling hole 111 gradually increases, the installation tightness between the elastic portion 131 and the hole wall of the assembling hole 111 and between the ignition needle 12 also gradually increases, the assembling firmness between the ignition needle 12 and the holder 11 is also gradually improved, and when the maximum dimension of the elastic portion 131 in the radial direction of the assembling hole 111 presses against the gap between the hole wall of the assembling hole 111 and the ignition needle 12, the installation tightness between the entire pressing member 13 and the hole wall of the assembling hole 111 and between the ignition needle 12 is better. When the ignition needle 12 needs to be disassembled, the ignition needle 12 is operated to slide relative to the bracket 11 along the installation direction, after the maximum size of the elastic part 131 in the radial direction of the assembly hole 111 is moved out of the assembly hole 111, the friction force between the pressing part 13 and the hole wall of the assembly hole 111 and between the ignition needle 12 is reduced, and therefore the ignition needle 12 can be conveniently disassembled.

Referring to fig. 10 again, further, the elastic part 131 includes a first elastic part 1312 and a second elastic part 1314 which are sequentially arranged along the assembling direction of the ignition needle 12 and connected to each other; in the natural state, the pressing member 13 at the position of the first elastic portion 1312 gradually increases in size in the radial direction of the mounting hole 111 along the mounting direction of the ignition needle 12, the pressing member 13 at the position of the second elastic portion 1314 gradually decreases in size in the radial direction of the mounting hole 111 along the mounting direction, and the pressing member 13 at the position of the connection between the first elastic portion 1312 and the second elastic portion 1314 has the largest size in the radial direction of the mounting hole 111. Specifically, the first elastic portion 1312 and the second elastic portion 1314 are symmetrically distributed with respect to a radial line of the assembly hole 111, and in the process of assembling the ignition needle 12 with the pressing member 13, whether the first elastic portion 1312 is arranged below the second elastic portion 1314 or the second elastic portion 1314 is arranged below the first elastic portion 1312, the pressing member 13 can be pressed between the hole wall of the assembly hole 111 and the ignition needle 12, so that the ignition needle 12 has high assembly efficiency.

Furthermore, the pressing element 13 further includes a first transition portion 132 and a second transition portion 133, the first transition portion 132 is connected to an end of the first elastic portion 1312 far away from the second elastic portion 1314, the second transition portion 133 is connected to an end of the second elastic portion 1314 far away from the first elastic portion 1312, and both the first transition portion 132 and the second transition portion 133 have a smaller size in the radial direction of the assembling hole 111 than the aperture of the assembling hole 111. In the process that the pressing member 13 enters the assembly hole 111, the second transition portion 133 first enters the assembly hole 111 and is in clearance fit with the hole wall of the assembly hole 111, and then, as the ignition needle 12 continues to slide, the second elastic portion 1314, or the second elastic portion 1314 and the first elastic portion 1312, or the second elastic portion 1314, the first elastic portion 1312 and the first transition portion 132 sequentially enter the assembly hole 111. Since the second transition portion 133 is smaller in size in the radial direction of the mounting hole 111 than the aperture of the mounting hole 111, the second transition portion 133 can position the pressing member 13 to prevent the second elastic portion 1314 from rebounding to cause the pressing member 13 to pop out of the mounting hole 111 during the process of contracting the second elastic portion 1314 into the mounting hole 111. Since the first transition portion 132 is smaller than the diameter of the mounting hole 111 in the radial direction of the mounting hole 111, when the second elastic portion 1314, the first elastic portion 1312 and the first transition portion 132 all enter the mounting hole 111, the first elastic portion 1312 can be clamped by a gap between the first elastic portion 1312 and the hole wall of the mounting hole 111, and the first elastic portion 1312 is pulled to slide out of the mounting hole 111, so as to facilitate the detachment of the ignition needle 12. Specifically, the first transition portion 132, the first elastic portion 1312, the second elastic portion 1314 and the second transition portion 133 are integrally formed and made of elastic materials. It should be noted that, the radial dimension of the first transition portion 132 in the radial direction of the assembly hole 111, the radial dimension of the second transition portion 133 in the radial direction of the assembly hole 111, the radial dimension of the pressing element 13 at the position of the first elastic portion 1312 in the radial direction of the assembly hole 111, and the radial dimension of the pressing element 13 at the position of the second elastic portion 1314 in the radial direction of the assembly hole 111 are the same as the radial dimension of the pressing element 13 at the position of the elastic portion 131 in the radial direction of the assembly hole 111, and therefore, the description thereof is omitted.

The second dimension in the radial direction of the assembly hole 111, the second transition portion 133 dimension in the radial direction of the assembly hole 111, the dimension in the radial direction of the assembly hole 111 of the pressing element 13 at the position of the first elastic portion 1312, and the dimension in the radial direction of the assembly hole 111 of the pressing element 13 at the position of the second elastic portion 1314 are defined in the same manner as the above-mentioned dimension in the radial direction of the assembly hole 111 of the pressing element 13 at the position of the elastic portion 131, and therefore, they will not be described again here.

Body 130 has a seizing channel 134 extending through body 130 in the assembling direction of ignition needle 12, and ignition needle 12 is assembled and fixed in seizing channel 134. Specifically, the jamming channel 134 is an interference fit with the ignition body 121. By arranging the clamping channel 134, the fixing manner of the body 130 and the ignition needle 12 is simple and easy, so that the assembly efficiency of the whole ignition device 10 is effectively improved.

Further, the body 130 is formed with mounting openings 135 extending to opposite end edges thereof, and the mounting openings 135 communicate with the chucking passage 134. Specifically, mounting opening 135 is also in direct communication with openings at both ends of clip channel 134, and therefore, ignition needle 12 can also be operated to press ignition body 121 of ignition needle 12 into clip channel 134 from mounting opening 135 during assembly of ignition device 10, which is easier and easier to implement than the way in which ignition needle 12 is operated to penetrate through clip channel 134 from the assembly direction, and facilitates improvement of assembly efficiency.

Further, the mounting opening 135 is provided with a bore diameter smaller than the diameter of the ignition body 121 in the circumferential direction of the ignition body 121. In this way, the ignition body 121 is prevented from being withdrawn from the mounting opening 135, so that the ignition body 121 and the pressing member 13 have better mounting reliability. Since the body 130 is made of an elastic material, the mounting opening 135 has a certain elasticity, so that the mounting opening 135 can be broken off by an external force in the process of pressing the ignition main body 121 into the clamping channel 134, so that the caliber of the mounting opening 135 is increased, thereby facilitating the installation of the ignition main body 121. After the ignition body 121 is fitted into the chucking passage 134, the external force is released, the deformation of the edge of the fitting opening 135 disappears or almost disappears, and the caliber of the fitting opening 135 is restored or substantially restored to the size of the ignition body 121 before fitting.

Elasticity reinforcing openings 136 which are arranged along the circumferential direction of the body 130 and distributed on two sides of the elastic part 131 are formed in the body 130, and each elasticity reinforcing opening 136 is communicated with the clamping channel 134. Through the arrangement of the elasticity enhancing port 136, in the process that the elastic part 131 abuts against and presses between the hole wall of the assembling hole 111 and the ignition needle 12, the extruded part of the elastic part 131 can expand along the circumferential direction of the body 130 to the area where the elasticity enhancing port 136 is arranged, so as to prevent the elastic part 131 from being folded, in addition, the arrangement of the elasticity enhancing port 136 can also reduce the contact area between the body 130 and the hole wall of the assembling hole 111 and the contact area between the body 130 and the ignition needle 12, thereby under the premise of ensuring the assembling firmness, the friction force between the abutting part 13 and the hole wall of the assembling hole 111 and between the ignition needle 12 can also be reduced, and a user can rapidly operate the abutting part 13 to be installed or removed.

Referring to fig. 7 and 8 again, the bracket 11 is further provided with a mounting hole 114 and a fixing hole 115 communicating between the mounting hole 114 and the outside, the mounting hole 114 penetrates through the bracket 11 along the assembling direction, and the fixing hole 115 communicates between the mounting hole 114 and the outside along the radial direction of the mounting hole 114. The ignition device 10 further includes a thermocouple 90 and a fixing member 80, the thermocouple 90 is inserted into the mounting hole 114, and the fixing member 80 is inserted into the fixing hole 115 and the mounting hole 114 along a radial direction of the mounting hole 114 and abuts against the thermocouple 90. Thus, the reliability of the installation of the thermocouple 90 can be effectively improved.

Specifically, the inner ring injection pipe 60 is coupled to the inner ring solenoid valve, the outer ring injection pipe 70 is coupled to the outer ring solenoid valve, the thermocouple 90 is electrically connected to both the inner ring solenoid valve and the outer ring solenoid valve, and the thermocouple 90 is configured to induce thermoelectric force. In the process of normal combustion of the inner ring fuel gas and the outer ring fuel gas, the thermocouple 90 senses that the thermoelectric force is normal, the inner ring electromagnetic valve and the outer ring electromagnetic valve are kept opened, and if the combustor 100 is suddenly extinguished, the thermocouple 90 senses that the thermoelectric force disappears, the inner ring electromagnetic valve and the outer ring electromagnetic valve are closed, so that danger is avoided.

Specifically, after the assembly is accomplished, thermocouple 90 and ignition needle 12 all wear to locate furnace end central cavity 22 along the direction of installation in proper order, branch fire central cavity 31 and inner ring central cavity 51, and ignition needle 12 and thermocouple 90 keep away from the one end of furnace end 20 and all are located inner ring central cavity 51, consequently, at the in-process that ignition needle 12 discharged the ignition, inner ring fire lid can form one and prevent wind the wall and surround in inner ring central cavity 51 with ignition needle 12 and thermocouple 90 keep away from the one end of furnace end 20, and like this, can prevent that the wind of external environment from disturbing ignition needle 12 and igniteing, so as to ignite inner ring gas and outer ring gas, still can prevent that the wind of external environment from influencing thermoelectric force, thereby make thermocouple 90 can be accurate detection thermoelectric force.

Referring to fig. 6, and also referring to fig. 7 and 8, the burner 20 has a premixing chamber 21 and a limiting hole communicating between the premixing chamber 21 and the outside; the bracket 11 comprises a bracket main body 116, a limiting part 117 and an assembling part 118, wherein the limiting part 117 and the assembling part 118 are connected to two opposite ends of the bracket main body 116, and the assembling part 118 is provided with an assembling hole 111; the bracket body 116 is arranged in the limiting hole in a penetrating manner, the ignition needles 12 and the assembling portions 118 are uniformly distributed on one side of the burner 20 where the premixing cavity 21 is arranged, and the limiting portion 117 is located outside the premixing cavity 21 and is abutted against one side of the burner 20, which is back to the premixing cavity 21.

Specifically, the bracket body 116 extends along the assembling direction, the limiting portion 117 and the assembling portion 118 are disposed at two opposite ends of the bracket body 116, and the assembling portion 118 is provided with a mounting hole 114, a fixing hole 115 and an assembling hole 111. The furnace end 20 comprises a bottom plate, an inner plate, an outer plate and a partition plate, wherein the inner plate and the outer plate are annular and are connected to the bottom plate in a matching mode, the outer plate is arranged around the periphery of the inner plate and is arranged at intervals with the inner plate, the inner surface of the inner plate is surrounded to form a furnace end central cavity 22, and the outer surface of the inner plate and the inner surface of the outer plate are jointly surrounded to form an annular premixing cavity 21. The number of the partition plates is two, the two partition plates are both connected to the bottom plate, and each partition plate is accommodated in the premixing cavity 21 and connected between the inner plate and the outer plate, so as to partition the premixing cavity 21 into an inner ring premixing cavity 212 and an outer ring premixing cavity 214. Set up the spacing hole that communicates in outside and inner ring premix chamber 212 on the bottom plate, when support main part 116 wears to locate spacing hole, assembly portion 118, ignition needle 12 and thermocouple 90 all are located one side that the bottom plate orientation inner ring premix chamber 212, and ignition needle 12 and thermocouple 90 wear to locate furnace end central cavity 22, branch fire central cavity 31 and inner ring central cavity 51 along the direction of installation in proper order, and spacing portion 117 is located the furnace end 20 outside and with the surface butt of furnace end 20 dorsad premix chamber 21. In this manner, the burner 20 may position the ignition device 10 to facilitate installation of the ignition device 10 with the burner 20.

Referring to fig. again, further, the surface of the limiting portion 117 facing the base plate is recessed to form a groove 1172, the surface of the base plate facing away from the premixing chamber 21 is protruded to form a boss 23, and after the ignition device 10 is assembled, the boss 23 is retained in the groove 1172. Boss 23 and recess 1172 are positioned to limit relative to each other and, in this manner, prevent ignition device 10 from sliding relative to the base plate on the surface of the base plate facing away from inner ring premix chamber 212, thereby providing ignition device 10 with improved reliability of installation.

Referring to fig. 5 again, further, the ignition device 10 further includes a connecting member 101, the limiting portion 117 and the boss 23 are both provided with a connecting hole 1174 communicated with the groove 1172, and the connecting member 101 is disposed through the connecting holes 1174 of the limiting portion 117 and the boss 23 and connected with the limiting portion 117 and the boss 23. Thus, the reliability of mounting the ignition device 10 to the burner 20 can be further improved, and the ignition device 10 can be prevented from sliding relative to the burner 20. Alternatively, the connector 101 may be a screw, a pin, or the like.

The above ignition device 10 and the burner 100 provided with the same are configured to provide a limit holding force to the ignition needle 12 by only providing the pressing member 130 to elastically press between the hole wall of the assembling hole 111 and the ignition needle 12, so that the assembling manner is simpler and the assembling efficiency is higher compared to the manner of fixing the ignition needle 12 and the bracket 11 by using a snap spring and a spring in the prior art.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An ignition device coupled to the burner, the ignition device comprising:

the bracket (11) is provided with an assembling hole (111);

the ignition needle (12) penetrates through the assembly hole (111); and

the pressing piece (13), the ignition needle (12) is assembled and fixed in the pressing piece (13);

wherein the pressing piece (13) is elastically pressed between the hole wall of the assembly hole (111) and the ignition needle (12) and is configured to provide a limiting and retaining force for the ignition needle (12).

2. An ignition device according to claim 1, characterized in that said pressing element (13) has a natural state and a contracted state;

in the natural state, the maximum size of the pressing piece (13) in the radial direction of the assembly hole (111) is larger than the aperture of the assembly hole (111);

in the contraction state, the pressing piece (13) is pressed to contract into the assembly hole (111) and is pressed between the hole wall of the assembly hole (111) and the ignition needle (12).

3. The ignition device according to claim 1, characterized in that the pressing element (13) comprises a body (130) and a resilient portion (131), and the ignition needle (12) is fixed in the body (130) in a limited manner;

when the pressing piece (13) is in the natural state, the largest size of the elastic part (131) in the radial direction of the assembly hole (111) is larger than the aperture of the assembly hole (111);

when the ignition needle is in the contraction state, the elastic part (131) is pressed to contract into the assembly hole (111) and is pressed between the hole wall of the assembly hole (111) and the ignition needle (12).

4. An ignition device according to claim 3, characterized in that the pressing member (13) at which the resilient portion (131) is located in the natural state has a size in the radial direction of the fitting hole (111) that gradually decreases in the fitting direction of the ignition needle (12).

5. The ignition device according to claim 3, wherein the elastic portion (131) comprises a first elastic portion (1312) and a second elastic portion (1314) which are sequentially arranged in the assembling direction of the ignition needle (12) and are connected to each other;

when the ignition needle is in the natural state, the size of the pressing piece (13) at the position of the first elastic part (1312) in the radial direction of the assembly hole (111) is gradually increased along the assembly direction of the ignition needle (12), the size of the pressing piece (13) at the position of the second elastic part (1314) in the radial direction of the assembly hole (111) is gradually decreased along the assembly direction, and the largest size of the pressing piece (13) at the position of the connection part of the first elastic part (1312) and the second elastic part (1314) in the radial direction of the assembly hole (111) is provided.

6. The ignition device according to claim 5, characterized in that the pressing member (13) further comprises a first transition portion (132) and a second transition portion (133), the first transition portion (132) is connected to an end of the first elastic portion (1312) away from the second elastic portion (1314), the second transition portion (133) is connected to an end of the second elastic portion (1314) away from the first elastic portion (1312), and the first transition portion (132) and the second transition portion (133) are smaller in size in a radial direction of the fitting hole (111) than an aperture of the fitting hole (111).

7. The ignition device according to claim 3, characterized in that the body (130) has a jamming channel (134) extending through the body (130) in the assembly direction of the ignition needle (12), the ignition needle (12) being fitted and fixed in the jamming channel (134).

8. The ignition device according to claim 7, wherein the body (130) is formed with mounting openings (135) extending to opposite end edges thereof, the mounting openings (135) communicating with the chucking passage (134).

9. The ignition device according to claim 7, wherein the body (130) is provided with elastic enhancement ports (136) which are arranged along the circumferential direction of the body (130) and distributed on two sides of the elastic part (131), and each elastic enhancement port (136) is communicated with the clamping channel (134).

10. The ignition device according to claim 1, wherein the ignition needle (12) comprises an ignition main body (121), a first stopping portion (122) and a second stopping portion (123), and the first stopping portion (122) and the second stopping portion (123) are both coupled to the ignition main body (121) and are sequentially arranged at intervals along the assembling direction of the ignition needle (12);

the ignition main body (121) is assembled and fixed in the pressing piece (13), and the pressing piece (13) is stopped between the first stopping part (122) and the second stopping part (123).

11. A burner, comprising:

a furnace head (20); and

the ignition device (10) of any one of claims 1 to 10, said ignition device (10) being coupled to said burner (20).