CN212930098U

CN212930098U - Combustor subassembly and cooking utensils

Info

Publication number: CN212930098U
Application number: CN202021828875.8U
Authority: CN
Inventors: 沈文盟
Original assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Current assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-04-09
Anticipated expiration: 2030-08-26

Abstract

The utility model provides a combustor subassembly and cooking utensils. The burner component comprises a burner, a valve body component and a heat insulation piece, wherein the burner is provided with an injection pipe, the air inlet end of the injection pipe is connected with an air door on the valve body component, and the heat insulation piece at least covers the valve body component and the air inlet end of the injection pipe from the upper side. The utility model provides an among the combustor subassembly, because the heat insulating part covers from the top and draws the inlet end and the whole valve body subassembly of penetrating the pipe, consequently when appearing tempering, the heat also can be blockked by the heat insulating part to on the glass panels of unable direct impact valve body subassembly top, protect glass panels not destroyed effectively. And the heat insulation piece can also play a certain role in reflection, and when heat generated by tempering impacts the heat insulation piece, the heat insulation piece can reflect part of the heat to a bottom shell of the stove, so that the temperature in the stove can be reduced, and the quality and the service life of the stove are further improved.

Description

Combustor subassembly and cooking utensils

Technical Field

The utility model relates to a kitchen utensil's technical field specifically relates to a combustor subassembly and cooking utensils that have it.

Background

With the improvement of the living standard of people, the requirements of users on kitchens are continuously improved, and the kitchen range becomes a necessary product for daily life.

When the stove is used, the tempering phenomenon can be caused because the opening degree of the air door is overlarge and any position on the gas pipeline is blocked by meal dregs, carbon black and the like. The tempering of the gas stove is that flame retracts into the inner cavity of the stove, and the combustion phenomenon of stove jet deflagration occurs, namely, the flame burns in the furnace chamber of the gas stove or at the air door rather than the air door, and is accompanied by detonation. The combustion and high temperature generated by the tempering of the gas stove are easily sprayed out from the interior of the burner through the air door and directly impact the glass panel, so that the accident of the glass panel explosion is caused. In order to avoid the burst of the glass panel, a baffle is added above the air door in the prior art to prevent heat from directly radiating on the glass panel, so that a certain heat insulation effect is achieved.

However, in practical use, once tempering occurs, the glass panel still bursts, and the service life of the cooker is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems occurring in the prior art, according to one aspect of the present invention, a burner assembly is provided. The burner component comprises a burner, a valve body component and a heat insulation piece, wherein the burner is provided with an injection pipe, the air inlet end of the injection pipe is connected with an air door on the valve body component, and the heat insulation piece at least covers the valve body component and the air inlet end of the injection pipe from the upper side.

The utility model provides an among the combustor subassembly, because the heat insulating part covers from the top and draws the inlet end and the whole valve body subassembly of penetrating the pipe, consequently when appearing tempering, the heat also can be blockked by the heat insulating part to on the glass panels of unable direct impact valve body subassembly top, protect glass panels not destroyed effectively. And the heat insulation piece can also play a certain role in reflection, and when heat generated by tempering impacts the heat insulation piece, the heat insulation piece can reflect part of the heat to a bottom shell of the stove, so that the temperature in the stove can be reduced, and the quality and the service life of the stove are further improved.

Illustratively, a first end of the thermal shield is coupled to the inlet end of the eductor tube and a second end of the thermal shield is coupled to the valve body assembly. Therefore, the heat insulation piece can well keep the relative position of the furnace end and the valve body assembly besides the heat insulation effect, the problems that the furnace end and the valve body assembly are eccentric and the like in the whole machine assembling and transporting process are avoided, the requirements on the assembling process during the production of the cooker are reduced, the batch consistency of the cooker is good, the performance is stable, the packaging requirements on products in the transporting process and the damage rate of the products in the transporting process are reduced, and therefore the cost can be effectively reduced. In addition, can adopt more firm fixed knot to construct on the drain pan, prevent furnace end and valve body subassembly offset in the transportation for the performance of this combustor subassembly is more stable.

Exemplarily, a limiting part and a first mounting hole are arranged on the top surface of the air inlet end of the injection pipe, a limiting matching part and a second mounting hole are arranged at the first end of the heat insulation piece, the limiting part is connected with the limiting matching part, and the first mounting hole is connected with the second mounting hole through a first fastener. Through the arrangement, the furnace end and the heat insulation piece can be firmly connected together, accurate concentricity between the valve body assembly and the heat insulation piece is guaranteed, the relative position of the furnace end and the heat insulation piece is stable, batch consistency of the cooker is good, and the performance is stable.

Illustratively, draw and penetrate the pipe including big fire drawing the pipe and draw the pipe with the small fire, the quantity of spacing portion is two, and two spacing portions are located the big fire respectively and draw the pipe with the small fire and draw the top surface of penetrating the inlet end of pipe, and first mounting hole is located between two spacing portions. Through the arrangement, the connection stress of the furnace end and the heat insulation piece is uniform, and the connection is firmer.

Illustratively, the second end of the heat insulation piece is provided with a positioning hole and a third mounting hole, the valve rod of the valve body assembly penetrates through the positioning hole, the valve body assembly is provided with a fourth mounting hole, and the third mounting hole and the fourth mounting hole are connected through a second fastener. Through the arrangement, the valve body assembly and the heat insulation piece can be firmly connected together, accurate concentricity between the valve body assembly and the heat insulation piece is guaranteed, the relative positions of the valve body assembly and the heat insulation piece are stable, batch consistency of the cooker is good, and the performance is stable. Simultaneously, pass the locating hole through the valve rod with valve body subassembly, can ensure that the sealing member in the valve rod is not destroyed by high temperature, valve body subassembly's reliability improves.

Illustratively, the number of the third mounting holes is two, and the third mounting holes are respectively located at two sides of the positioning hole, and correspondingly, the number of the fourth mounting holes is also two. Through the arrangement, the connection stress of the valve body assembly and the heat insulation piece is uniform, and the connection is firmer.

Illustratively, the thermal shield comprises a first plate-like portion and a second plate-like portion, the first plate-like portion being lower than the second plate-like portion, the first plate-like portion and the second plate-like portion being connected by a step therebetween, the first end of the thermal shield being disposed on the first plate-like portion, the second end of the thermal shield being disposed on the second plate-like portion. Through the arrangement, the connection between the furnace end and the valve body assembly and the heat insulation piece can be positioned in different planes, and the furnace end and the valve body assembly can be well attached. In addition, when the tempering phenomenon occurs in the furnace end, the flame and the heat sprayed out of the air inlet on the air door can be upwards sprayed onto the glass panel and can also be sprayed towards the valve body assembly. Lubricating oil can be arranged in the valve body part at the top of the valve body assembly, the lubricating oil can ensure that the valve rod smoothly and stably rotates relative to the valve body part, and a sealing element is further arranged in the valve body part, however, once flame and heat generated by tempering are sprayed to the valve body part, the lubricating oil can be oxidized to lose efficacy, the sealing element is damaged, and then the valve body assembly is damaged. Because the heat insulating part is better with the laminating of valve body subassembly for the gap between heat insulating part and the valve body subassembly is narrower, and under the condition that the heat insulating part has better thermal-insulated effect, the narrower thermal propagation speed that can restrict in gap, consequently can avoid the valve body subassembly to be damaged effectively.

Illustratively, the step is a greater distance from the first end than the second end. Thus, the heat insulation piece can be better attached to the valve body assembly, and the size of the burner assembly is more exquisite and small. And, because the heat insulating part is better with the laminating of valve body subassembly for the gap between heat insulating part and the valve body subassembly is narrower, and under the condition that the heat insulating part has better thermal-insulated effect, the narrower thermal propagation speed that can restrict in gap, consequently can avoid the valve body subassembly to be damaged more effectively.

The insulation element is, for example, made of an insulating material or a surface of the insulation element is provided with an insulating layer. Therefore, the heat insulation effect of the heat insulation piece is more outstanding, and the quality and the service life of the cooker are further improved.

According to another aspect of the utility model, still provide a cooking utensils. The cooktop includes a burner assembly as any of the above.

The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a perspective view of a burner assembly according to an exemplary embodiment of the present invention, with a first fastener and a second fastener removed;

FIG. 2 is another angled perspective view of the burner assembly shown in FIG. 1;

FIG. 3 is an exploded view of an angle of the burner assembly shown in FIG. 1; and

fig. 4 is an exploded view of another angle of the burner assembly shown in fig. 3.

Wherein the figures include the following reference numerals:

100. a furnace end; 110. a first mounting hole; 120. an injection pipe; 121. a high fire ejector tube; 122. a small fire ejector tube; 123. an air inlet end; 124. a damper; 130. a limiting part; 200. a valve body assembly; 210. a valve stem; 220. a nozzle; 240. a fourth mounting hole; 300. a thermal insulation member; 310. a limit matching part; 320. a second mounting hole; 330. a third mounting hole; 340. positioning holes; 351. a first plate-like portion; 352. a second plate-like portion; 353. a step; 410. a first fastener; 420. a second fastener.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

The utility model provides a combustor subassembly. The burner assembly may be employed within a cooktop. Therefore, the utility model also provides a cooking utensils, cooking utensils can include any kind of combustor subassembly of the utility model. Cooktops include, but are not limited to, integrated cooktops, conventional gas cooktops, and the like. The burner assembly provided by the present invention can also be applied to other suitable devices, if necessary.

As shown in fig. 1-4, the burner assembly may include a burner 100, a valve body assembly 200, and insulation 300. The burner 100 may have an ejector tube 120. A damper 124 is provided on the nozzle 220 of the valve body assembly 200. The air inlet end 123 of the bleed tube 120 is connected to the damper 124 of the valve body assembly 200. The thermal shield 300 covers at least the valve body assembly 200 and the inlet end 123 of the injection pipe 120 from above. Insulation 300 may be mounted on any suitable component within the cooktop, such as the bottom case (not shown) of the cooktop, a panel glass, and the like. The structure and operation of the burner 100 and the valve body assembly 200 themselves are well known in the art and therefore will not be described in further detail herein.

The nozzle 220 of the valve body assembly 200 is directly inserted into the air inlet of the air inlet end 123 of the injection pipe 120, but the outer diameter of the nozzle 220 is smaller than the inner diameter of the air inlet, and the nozzle 220 is in a suspended state in the air inlet of the injection pipe 120. The valve body assembly 200 is connected to the inlet end 123 of the eductor tube 120 by a damper 124 on the nozzle 220. An air inlet is provided in the damper 124 of the valve body assembly 200 and is aligned with the annular passage between the nozzle 220 and the inlet of the eductor tube 120. The damper 124 may adjust the amount of air introduced into the burner 100 by changing the size of the air inlet through rotation, to adjust the combustion state of the flame. If a backfire occurs in the burner 100 for some reason, flame and heat may be ejected from the air inlets in the damper 124. Therefore, the prior art has provided a baffle just above the damper to provide thermal insulation for the glass panel. However, the inventors have found that the baffle plate has a very limited effect, and that heat emitted from the air inlet port of the damper 124 is emitted in the direction of the emitted heat to the glass panel above the valve body assembly 200, thereby still causing the glass panel to burst.

In contrast, in the burner assembly provided by the present invention, since the heat insulating member 300 covers the air inlet 123 of the injection pipe 120 and the entire valve body assembly 200 from above, when a backfire occurs, the heat can also be blocked by the heat insulating member 300, so that the heat cannot directly impact the glass panel above the valve body assembly 200, thereby effectively protecting the glass panel from being damaged. Moreover, the heat insulation piece 300 can also play a certain role in reflection, and when heat generated by tempering impacts the heat insulation piece 300, the heat insulation piece 300 can reflect a part of heat to a bottom shell of the kitchen range, so that the temperature inside the kitchen range can be reduced, and the quality and the service life of the kitchen range are further improved.

Alternatively, the thermal insulation member 300 may be made of various existing thermal insulation materials; alternatively, the insulation member 300 may be provided on the surface thereof with various kinds of insulation layers existing. Thus, the heat insulation effect of the heat insulation piece 300 is more prominent, and the quality and the service life of the cooker are further improved.

The prior art cookers typically fix the burner 100 and the valve body assembly 200 on the bottom case of the cooker, thereby maintaining the relative positions of the burner 100 and the valve body assembly 200. In order to ensure that the concentricity of the center of the injection pipe 120 of the burner 100 and the nozzle 220 of the valve body assembly 200 is better and ensure the product performance of the cooker, a waist circular hole is arranged on the bottom shell, so that the positions of the burner 100 and the valve body assembly 200 can be adjusted by related personnel conveniently. However, on one hand, due to the structural problem of the waist circular hole, the positions of the furnace end 100 and the valve body assembly 200 are deviated in the transportation process of the stove, so that the furnace end 100 and the nozzle 220 are eccentric, and the performance is affected; on the other hand, the structure needs to be positioned through a tool to enable the furnace end 100 and the valve body assembly 200 to be in butt joint, the requirement on the assembly process of mass production is high, and due to the fact that the positions of the furnace end 100 and the valve body assembly 200 need to be finely adjusted, batch consistency of the cooker is poor, and performance is unstable. Moreover, once the bottom case is deformed during transportation, there is a possibility that an unrecoverable eccentricity between the burner 100 and the nozzle 220 may occur, thereby seriously affecting the performance of the burner assembly.

In view of the above, as shown in fig. 1 to 4, a first end of the heat insulator 300 (the left end of the heat insulator 300 in fig. 1) may be connected to the air inlet end 123 of the injection pipe 120. A second end of insulation 300 (the right end of insulation 300 in fig. 1) may be coupled to valve body assembly 200. The first end and the second end are opposite ends of the thermal insulation member 300, respectively. The first end of the thermal shield 300 may be coupled to the inlet end 123 of the eductor tube 120 by a variety of means, such as welding, adhesives, threading, and the like. Likewise, the second end of the thermal shield 300 may likewise be attached to the valve body assembly 200 in a variety of ways, such as welding, gluing, threading, and the like. The manner in which the first end of the thermal shield 300 is coupled to the inlet end 123 of the eductor tube 120 and the manner in which the second end of the thermal shield 300 is coupled to the valve body assembly 200 may be the same or different.

Like this, heat insulating part 300 can not only play thermal-insulated effect, can also keep the relative position of furnace end 100 and valve body subassembly 200 well, avoids in complete machine assembly and transportation, furnace end 100 and valve body subassembly 200 appear the off-centre scheduling problem, the requirement to assembly process when having reduced cooking utensils volume production for the batch uniformity of cooking utensils is better, the stable performance, and reduced the packaging requirement to the product in the transportation, and the spoilage that the transportation produced the product, therefore can reduce cost effectively. In addition, a firmer fixing structure can be adopted on the bottom shell, so that the position deviation of the furnace end 100 and the valve body assembly 200 in the transportation process is prevented, and the performance of the burner assembly is more stable.

Preferably, as shown in fig. 1 to 4, a top surface of the air inlet end 123 of the injection pipe 120 may be provided with a limiting portion 130 and a first mounting hole 110. The number of the stopper portions 130 and the first mounting holes 110 may be arbitrary. The first end of the thermal insulation member 300 may be provided with a limit fitting part 310 and a second installation hole 320. The number of the position limiting engagement portions 310 may correspond to the number of the position limiting portions 130. The number of the first mounting holes 110 may correspond to the number of the second mounting holes 320. The spacing portion 130 and the spacing mating portion 310 may be engaged. In the embodiment shown in the drawings, the position-limiting portion 130 is a positioning pin, and the position-limiting matching portion 310 is a positioning hole, so that the first end of the heat insulating member 300 is precisely butted against the air inlet end 123 of the injection pipe 120. In an embodiment not shown, the structures of the position-limiting part 130 and the position-limiting matching part 310 can be interchanged, or any other suitable structures can be adopted for the position-limiting part 130 and the position-limiting matching part 310. The first and second mounting

holes

110 and 320 may be connected by a first fastener 410. In the embodiment shown in the figures, the first fastener 410 is a threaded connection. In an embodiment not shown, the first fastener 410 may also be a pin or the like. Through the arrangement, the furnace end 100 and the heat insulation piece 300 can be firmly connected together, accurate concentricity between the valve body assembly 200 and the heat insulation piece 300 is ensured, the relative positions of the furnace end 100 and the heat insulation piece 300 are stable, the batch consistency of the cooker is good, and the performance is stable.

Further, as shown in fig. 1 to 4, the ejector pipe 120 may include a high fire ejector pipe 121 and a low fire ejector pipe 122. The large fire ejector tube 121 and the small fire ejector tube 122 are well known in the art and therefore will not be described in further detail herein. The number of the stopper portions 130 may be two. The two limiting portions 130 may be respectively located on top surfaces of air inlet ends of the large fire ejector pipe 121 and the small fire ejector pipe 122. The first mounting hole 110 may be located between the two limiting portions 130. Through the arrangement, the connection stress of the furnace end 100 and the heat insulation piece 300 is uniform, and the connection is firmer.

Preferably, as shown in fig. 1-4, the second end of the thermal insulation member 300 may be provided with a positioning hole 340 and a third installation hole 330. The valve stem 210 of the valve body assembly 200 may pass through the positioning hole 340. The valve body assembly 200 may be provided with a fourth mounting hole 240. The third and fourth mounting

holes

330 and 240 may be connected by a second fastener 420. In the embodiment shown in the figures, the second fastener 420 is a threaded connection. In other embodiments not shown, the second fastener 420 may also be a pin or the like. The first fastener 410 and the second fastener 420 may be the same or different. Through the arrangement, the valve body assembly 200 and the heat insulation piece 300 can be firmly connected together, accurate concentricity between the valve body assembly 200 and the heat insulation piece 300 is guaranteed, the relative positions of the valve body assembly 200 and the heat insulation piece 300 are stable, batch consistency of the cooker is good, and the performance is stable. Meanwhile, by passing the valve stem 210 of the valve body assembly 200 through the positioning hole 340, it is ensured that the sealing member in the valve stem 210 is not damaged by high temperature, and the reliability of the valve body assembly 200 is improved.

Further, as shown in fig. 1 to 4, the number of the third mounting holes 330 is two. The two third mounting holes 330 may be respectively located at both sides of the positioning hole 340. Correspondingly, the number of the fourth mounting holes 240 is also two. Through the arrangement, the connection stress of the valve body assembly 200 and the heat insulation piece 300 is uniform, and the connection is firmer.

Preferably, as shown in fig. 1-4, insulation member 300 may include a first plate-like portion 351 and a second plate-like portion 352. The first plate-like portion 351 may be lower than the second plate-like portion 352. The first plate-like portion 351 and the second plate-like portion 352 may be connected by a step 353. A first end of the heat insulator 300 may be disposed on the first plate-shaped portion 351. A second end of insulation member 300 may be disposed on second plate-like portion 352. Through this arrangement, the connection between the burner 100 and the valve body assembly 200 and the heat insulation member 300 can be located in different planes, and can be well attached to the burner 100 and the valve body assembly 200. In addition, when a backfire occurs in the burner 100, the flame and heat emitted from the air inlet of the damper 124 are not only emitted upward to the glass panel but also toward the valve body assembly 200. Lubricating oil is provided in the valve body portion at the top of the valve body assembly 200, which can ensure smooth and stable rotation of the valve rod 210 relative to the valve body portion, and a sealing member is provided in the valve body portion, but once flame and heat generated by tempering are injected to the valve body portion, the lubricating oil is oxidized and fails, the sealing member is damaged, and the valve body assembly 200 is damaged. Because the heat insulation member 300 is well attached to the valve body assembly 200, a gap between the heat insulation member 300 and the valve body assembly 200 is narrow, and the narrow gap can limit the propagation speed of heat under the condition that the heat insulation member 300 has a good heat insulation effect, so that the valve body assembly 200 can be effectively prevented from being damaged.

Further, as shown in FIGS. 1-4, step 353 may be located a greater distance from the first end than the second end. That is, the first plate-like portion 351 has a size larger than that of the second plate-like portion 352 along the axial direction of the nozzle 220. In this way, the heat insulator 300 can be better attached to the valve body assembly 200, and the burner assembly can be more compact in size. Moreover, because the heat insulation member 300 is better attached to the valve body assembly 200, the gap between the heat insulation member 300 and the valve body assembly 200 is narrow, and the narrow gap can limit the propagation speed of heat under the condition that the heat insulation member 300 has a good heat insulation effect, so that the valve body assembly 200 can be more effectively prevented from being damaged.

It should be noted that, in the above embodiments, the number of the injection pipes, the number of the limiting portions, the number of the limiting matching portions, and the specific structures of the limiting portions and the limiting matching portions of the burner assembly are only exemplary, and the present invention is not limited thereto, as long as the burner assembly and the stove to which the burner assembly belongs can be implemented.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a combustor subassembly, its includes furnace end (100) and valve body subassembly (200), the furnace end has and draws and penetrates pipe (120), draw air inlet end (123) of penetrating the pipe with air door (124) on the valve body subassembly are connected, its characterized in that, the combustor still includes heat insulating part (300), heat insulating part covers from the top at least the valve body subassembly with draw the air inlet end of penetrating the pipe.

2. The burner assembly of claim 1 wherein a first end of the thermal shield (300) is coupled to the inlet end (123) of the eductor tube (120) and a second end of the thermal shield is coupled to the valve body assembly (200).

3. The burner assembly of claim 2, wherein the top surface of the inlet end (123) of the injector tube (120) is provided with a limit portion (130) and a first mounting hole (110), the first end of the heat insulator (300) is provided with a limit mating portion (310) and a second mounting hole (320), the limit portion is engaged with the limit mating portion, and the first mounting hole and the second mounting hole are connected by a first fastening member (410).

4. The burner assembly of claim 3, wherein the injection pipe (120) comprises a high-fire injection pipe (121) and a low-fire injection pipe (122), the number of the limiting parts (130) is two, the two limiting parts are respectively positioned on the top surfaces of the air inlet ends of the high-fire injection pipe and the low-fire injection pipe, and the first mounting hole (110) is positioned between the two limiting parts.

5. The burner assembly of claim 2, wherein the second end of the thermal shield (300) is provided with a positioning hole (340) through which the valve stem (210) of the valve body assembly (200) passes and a third mounting hole (330) provided with a fourth mounting hole (240), the third and fourth mounting holes being connected by a second fastener (420).

6. The burner assembly of claim 5, wherein the number of the third mounting holes (330) is two, and the number of the fourth mounting holes (240) is two correspondingly, and the number of the third mounting holes (330) is two.

7. A burner assembly according to claim 1, wherein the thermal shield (300) comprises a first plate-like portion (351) and a second plate-like portion (352), the first plate-like portion being lower than the second plate-like portion, the first and second plate-like portions being connected by a step (353), the first end of the thermal shield being provided on the first plate-like portion and the second end of the thermal shield being provided on the second plate-like portion.

8. The burner assembly of claim 7, wherein the step (353) is a greater distance from the first end than the second end.

9. Burner assembly according to claim 1, wherein the insulation (300) is made of an insulating material or provided with an insulating layer on its surface.

10. Hob, characterized in that it comprises a burner assembly according to any one of claims 1 to 9.