CN213930928U - Fire cover and combustor with same - Google Patents

Abstract

The utility model provides a fire lid and combustor that has this fire lid. The fire lid is including being annular fire lid main part, circumference interval equipartition has a plurality of fire grooves in the fire lid main part on the radial direction of fire lid main part, fire groove from outer to inner has far-centre end and nearly central end, just the width in fire groove is followed far-centre end is past nearly central end direction crescent. The utility model discloses avoided the gas not burn the problem of just leaking out to improve the thermal efficiency, also avoided kitchen air pollution.

Description

Fire cover and combustor with same

Technical Field

The utility model relates to a domestic gas cooking utensils technical field specifically relates to a fire lid and have combustor of this fire lid.

Background

At present, two burners are generally arranged on a household gas cooker. Each burner includes a distributor, a venturi connected to the distributor, and a fire cover covering the distributor and forming a mixing chamber by the three. The fire cover is provided with a plurality of fire grooves, and gas in the gas mixing chamber flows out of the fire grooves and is combusted on the surface of the fire grooves. However, because the width of the fire groove on the existing fire cover is consistent, when the burner is ignited in a cold state, part of gas flowing out from one end of the fire groove far away from the ignition needle may leak out without being combusted, so that not only is the thermal efficiency insufficient, but also the kitchen air is polluted.

Therefore, how to avoid the problem that part of the gas leaks without being combusted becomes a technical key point to be solved urgently by the combustor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fire lid to there is part gas to have in the fire lid among the solution prior art and does not burn the problem with regard to leaking.

In order to achieve the above object, the utility model provides a fire lid, including being annular fire lid main part, circumference interval equipartition has a plurality of fire grooves in the fire lid main part on the radial direction of fire lid main part, the fire groove has far away central end and nearly central end from outer to inner, just the width in fire groove is followed far away central end is past nearly central end direction crescent.

The width of the fire groove is gradually increased from the far center end to the near center end, the fire groove is of a gradual structure, when the gas is ignited in a cold state, the gas is firstly ignited at the near center end (the widest position) of the fire groove, and then the gas at the far center end (the narrowest position) of the fire groove is ignited, so that the problem that the gas leaks out without burning is avoided, the heat efficiency is improved, and the air pollution of a kitchen is also avoided.

Illustratively, the fire slot has a slot width N at the distal central end, 0.9mm N1.2 mm. Therefore, the problem that the fuel gas leaks out without being combusted can be avoided, and the heating requirement of the cooker can be met.

Illustratively, the fire slot has a slot width M at the near-center end of 1.3mm ≦ M ≦ 1.5 mm. So, can satisfy the cooking utensil heating demand, also can avoid the groove width too big influence fire lid intensity in order to influence fire lid life.

Exemplarily, the fire cover body comprises an inner side wall, a top wall and an outer side wall, the inner side wall extends downwards from the inner periphery of the top wall, the outer side wall extends downwards from the outer periphery of the top wall, the inner side wall, the top wall and the outer side wall have the same wall thickness P, and P is larger than or equal to 2mm and smaller than or equal to 3.5 mm. Therefore, the fire cover main body can be made of stainless steel, the wall thickness of the fire groove can reach 3.5mm-5mm after the fire groove is cut, the wall thickness basically can meet the wall thickness requirement of the copper fire cover main body, the cost is reduced, the occurrence of flame leaving and tempering phenomena during combustion is greatly reduced, and the combustion working condition is stable.

Illustratively, the plurality of fire slots includes a plurality of first fire slots and a plurality of second fire slots, the first fire slots and the second fire slots have different lengths, the near center end on the first fire slot is defined as a first near center end, the far center end is defined as a first far center end, the near center end on the second fire groove is defined as a second near center end, the far center end is defined as a second far center end, the first near center ends of the first fire grooves are on a circle which takes the center of the fire cover main body as the center and has the diameter of D1, the second near center ends of the second fire grooves are on a circle which takes the center of the fire cover main body as the center and has the diameter of D2, the first far center ends of the first fire grooves and the second far center ends of the second fire grooves are on a circle which takes the center of the fire cover main body as the center and has the diameter of D3, wherein D1 is more than D2 and more than D3. Therefore, the first near-center end of the first fire groove is closer to the center of the fire cover main body than the second near-center end of the second fire groove, the first near-center end of the first fire groove can serve as a fire-leading groove to improve flame transfer stability, and flame is uniformly distributed on the first fire groove and the second fire groove during combustion of gas to form a double-ring fire-like type, so that flame separation is further avoided, the combustion is more uniform during heating of a cooker by the flame, and the thermal efficiency is further improved; moreover, a larger distance is reserved between the second center-near end of the second fire groove and the center of the fire cover main body, and the service life of the fire cover is prolonged.

Illustratively, the ratio of the number N1 of the first fire grooves to the number N2 of the second fire grooves is 1: 2-1: 4, and N second fire grooves are arranged between every two adjacent first fire grooves, wherein N is a positive integer between 2-4. So, first fire groove and second fire groove arrange in turn, and the flame root on the first fire groove can be stabilized at the first nearly center end in first fire groove, can not form cross flame with the flame on the second fire groove, more can avoid from the flame, homogeneity when guaranteeing flame heating cooking utensil.

Illustratively, D1 is 50mm to 65mm and D2 is 75mm to 85 mm. Therefore, the fire transfer distance is moderate, and the stability of flame transfer is ensured; the service life of the fire cover cannot be influenced by the arrangement of the fire grooves.

Illustratively, the first proximal hub end and the second proximal hub end are both located on the top wall, and the first distal hub end and the second distal hub end are both located on the outer sidewall. So, conveniently cover the first fire groove of shaping and the second fire groove in the main part at the fire.

Illustratively, the outer side wall has a bottom end surface away from the top wall, the first and second distal central ends have a distance b from the bottom end surface, and b is 2.5mm to 4.5 mm. So, can guarantee the structural strength of fire lid main part, can not influence fire lid life because of the setting in first fire groove and second fire groove.

According to another aspect of the present invention, there is also provided a burner comprising any one of the fire covers as described above. Since the above fire cover has the above advantageous effects, the burner provided with the above fire cover also has the above advantageous effects.

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 block diagram of a fire cover according to an exemplary embodiment of the present invention;

FIG. 2 is a front view of the fire cover of FIG. 1;

FIG. 3 is a partial top view of the fire lid of FIG. 1;

fig. 4 is a cross-sectional view taken along line a-a of fig. 2 (after 90 ° clockwise rotation).

Wherein the figures include the following reference numerals:

10-fire lid main body

11-inner side wall

12-roof wall

13-outer side wall

131-bottom end face

14-gas channel

20-fire trough

201-proximal to the center

202-remote center end

210-first fire trough

211-first near-center end

212-first remote center end

220-second fire trough

221-second proximal end

222-second distal center end

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.

For a household gas range, a burner of the household gas range generally has a large flame cover (also called an outer ring flame cover) and a small flame cover (also called a center flame cover) to form at least two rings of flames, thereby providing a plurality of flame modes when used by a user. Accordingly, the burner further comprises a large flame distributor and a small flame distributor, and a large flame venturi and a small flame venturi. The small fire distributor is arranged at the center of the large fire distributor. The big fire cover and the small fire cover are respectively covered on the big fire distributor and the small fire distributor, and the big fire cover is positioned at the periphery of the small fire cover. The big fire venturi and the small fire venturi are respectively connected to the big fire distributor and the small fire distributor. The big fire distributor, the big fire cover and the big fire venturi form a big fire gas mixing chamber. The small fire distributor, the small fire cover and the small fire venturi form a small fire gas mixing chamber.

The fire cover according to an embodiment of the present invention will be described with reference to fig. 1 to 4, and the fire cover according to the present invention is the fire cover described above, but it is also applicable to a small fire cover.

As shown in fig. 1 to 3, the fire cover includes a fire cover main body 10 in an annular shape, a plurality of fire grooves 20 are uniformly distributed on the fire cover main body 10 at intervals in the circumferential direction, in the radial direction of the fire cover main body 10, the fire grooves 20 have a far central end 202 and a near central end 201 from outside to inside, and the width of the fire grooves 20 gradually increases from the far central end 202 to the near central end 201. According to the fire cover, as the width of the fire groove 20 is gradually increased from the far central end 202 to the near central end 201, the fire groove 20 is of a gradual change structure, when gas is ignited in a cold state, the gas is firstly ignited at the near central end 201 (the widest part) of the fire groove, then the gas at the far central end 202 (the narrowest part) of the fire groove is ignited, the groove width of the far central end 202 is narrow, and the gas quantity flowing out from the far central end 202 is relatively small, so that the problem that the gas leaks out without being combusted is avoided, the heat efficiency is improved, and air pollution of a kitchen is also avoided.

Referring again to FIG. 3, the fire slot 20 has a slot width N at the far center end 202, where N is 0.9mm or more and 1.2mm or less, such as 0.9mm, 1mm, 1.1mm, 1.2mm, etc., so as to avoid the problem of gas leakage without combustion and meet the heating requirement of the cooker. The width of the fire groove 20 near the center end 201 is M, M is larger than or equal to 1.3mm and smaller than or equal to 1.5mm, such as 1.3mm, 1.4mm, 1.4mm and the like, so that the heating requirement of the cooker can be met, and the influence of the too large width on the strength of the fire cover to influence the service life of the fire cover can be avoided.

Referring to fig. 4 in combination, the fire lid body 10 includes an inner side wall 11, a top wall 12 and an outer side wall 13, the inner side wall 11 extends downward from an inner peripheral edge of the top wall 12, the outer side wall 13 extends downward from an outer peripheral edge of the top wall 12, the inner side wall 11, the top wall 12 and the outer side wall 13 surround to form an air channel 14, the air channel 14 is communicated with the outside through a first fire chute 210 and a second fire chute 220, the air channel 14 is used as a part of the air mixing chamber, and the inner side wall 11, the top wall 12 and the outer side wall 13 have the same wall thickness P, P is greater than or equal to 2mm and less than or equal to 3.5mm, such as 2mm, 2.5mm, 3mm, 3.5mm and the like. Therefore, the fire cover main body 10 can be made of stainless steel, the wall thickness S of the fire groove 20 can reach 3.5mm-5mm after the fire groove is cut, the wall thickness can basically meet the wall thickness requirement of the copper fire cover main body, the cost is reduced, the phenomena of flame separation and tempering during combustion are greatly reduced, and the combustion working condition is stable.

Referring again to fig. 1 and 2 in combination, as an exemplary embodiment, the plurality of fire slots 20 includes a plurality of first fire slots 210 and a plurality of second fire slots 220, the first fire grooves 210 and the second fire grooves 220 have different lengths in the radial direction of the fire cap body 10, and more particularly, the first fire grooves 210 have first near center ends 211 and first far center ends 212, the second fire grooves 220 have second near center ends 221 and second far center ends 222, the first near center ends 211 of the plurality of first fire grooves are on a circle having a diameter of D1 with the center of the fire cap body 10 as a center, the second near center ends 221 of the plurality of second fire grooves are on a circle having a diameter of D2 with the center of the fire cap body 10 as a center, the first far center ends 212 of the plurality of first fire grooves and the second far center ends 222 of the plurality of second fire grooves are on a circle having a diameter of D3 with the center of the fire cap body 10 as a center, wherein D1 < D2 < D3. Based on the arrangement of the first fire groove 210 and the second fire groove 220, and the first fire groove 21 and the second fire groove 220 have different lengths, when the gas is ignited in a cold state, because the first near center end 211 of the first fire groove is closer to the center of the fire cover main body 10 than the second near center end 221 of the second fire groove, the gas can be used as a pilot fire groove to improve the flame transfer stability, and when the gas is combusted, the flame is uniformly distributed on the first fire groove 210 and the second fire groove 220 to form a double ring fire-like pattern, so that the flame is prevented from leaving, the combustion is more uniform when the flame heats the cooker, and the heat efficiency is improved; furthermore, the second near-center end 221 of the second fire groove has a larger distance from the center of the fire cover main body 10, and the service life of the fire cover is not affected.

Furthermore, the ratio of the number N1 of the first fire grooves 210 to the number N2 of the second fire grooves 220 is 1: 2-1: 4, and N second fire grooves 220 are arranged between every two adjacent first fire grooves 210, wherein N is a positive integer between 2-4. Therefore, the first fire grooves 210 and the second fire grooves 220 are alternately arranged, the root parts of the flames on the first fire grooves 210 can be stabilized at the first near-center end 211 of the first fire groove, cross flames can not be formed between the flames on the first fire grooves 210 and the flames on the second fire grooves 220, the flame leaving can be avoided, and the uniformity of the flames in the process of heating cookers is guaranteed. As an exemplary embodiment, N1 ═ 10, N2 ═ 20, and N ═ 2. In an embodiment not shown, N1 ═ 10, N2 ═ 30, N ═ 3; or N1 ═ 10, N2 ═ 40, N ═ 4, and so on.

Illustratively, D1 is 50mm to 65mm, such as 50mm, 55mm, 60mm, 65mm, and so forth, and D2 is 75mm to 85mm, such as 75mm, 80mm, 85mm, and so forth. Therefore, the fire transfer distance is moderate, and the stability of flame transfer is ensured; the service life of the fire cover cannot be influenced by the arrangement of the fire grooves.

Illustratively, the first proximal hub end 211 and the second proximal hub end 221 are both located on the top wall 11, and the first distal hub end 212 and the second distal hub end 222 are both located on the outer sidewall 13. Thus, the gas passage 14 of the fire lid main body 10 can be formed not only with a simple structure; also, it is convenient to form the first fire grooves 210 and the second fire grooves 220 on the fire cover body 10.

Referring again to fig. 3, the outer sidewall 13 has a bottom end surface 131 away from the top wall 12, and the first and second distal central ends 212 and 222 are spaced from the bottom end surface 131 by a distance b, which is 2.5mm to 4.5mm, such as 2.5mm, 3mm, 3.5mm, 4mm, 4.5 mm. Therefore, the structural strength of the fire cover main body 10 can be ensured, and the service life of the fire cover is not influenced by the arrangement of the first fire groove 210 and the second fire groove 220.

According to another aspect of the present invention, there is also provided a burner having any one of the fire covers as described above. Besides, the burner also comprises a venturi, a distributor and the like. The venturi and the distributor may have various structures, present or possible in the future, which do not constitute a limitation of the scope of protection of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "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 (10)

1. The utility model provides a fire lid, is including being annular fire lid main part, circumference interval equipartition has a plurality of fire grooves in the fire lid main part, its characterized in that on the radial direction of fire lid main part, fire groove from outer to inner has far away central point and nearly central point, just the width in fire groove is followed far away central point is past nearly central point direction crescent.

2. The fire cover of claim 1, wherein the fire slot has a slot width N at the distal central end, 0.9mm ≦ N ≦ 1.2 mm.

3. The fire cover of claim 2 wherein said fire slot has a slot width M at said proximal end, 1.3mm M1.5 mm.

4. The fire lid of claim 3, wherein the fire lid body comprises an inner side wall, a top wall and an outer side wall, the inner side wall extends downward from an inner periphery of the top wall, the outer side wall extends downward from an outer periphery of the top wall, the inner side wall, the top wall and the outer side wall have the same wall thickness P, and P is greater than or equal to 2mm and less than or equal to 3.5 mm.

5. The fire cover according to claim 4, wherein the plurality of fire slots include a plurality of first fire slots and a plurality of second fire slots, the first fire slots and the second fire slots have different lengths, a near center end on the first fire slot is defined as a first near center end and a far center end is defined as a first far center end, a near center end on the second fire slot is defined as a second near center end and a far center end is defined as a second far center end, the first near center ends of the plurality of first fire slots are on a circle having a diameter D1 and centered at the center of the fire cover body, the second near center ends of the plurality of second fire slots are on a circle having a diameter D2 and centered at the center of the fire cover body, the first far center ends of the plurality of first fire slots and the second far center ends of the plurality of second fire slots are on a circle having a center of the fire cover body and at the center of the fire cover body, And a circle with a diameter of D3, wherein D1 < D2 < D3.

6. The fire cover according to claim 5, wherein the ratio of the number N1 of the first fire grooves to the number N2 of the second fire grooves is 1: 2-1: 4, and N second fire grooves are arranged between every two adjacent first fire grooves, wherein N is a positive integer between 2-4.

7. The fire lid as claimed in claim 5, wherein D1 is 50mm to 65mm and D2 is 75mm to 85 mm.

8. The fire cover of claim 5 wherein said first proximal end and said second proximal end are both located on said top wall and said first distal end and said second distal end are both located on said outer sidewall.

9. The fire lid of claim 8, wherein said outer side wall has a bottom end surface remote from said top wall, said first and second distal central ends having a distance b from said bottom end surface, b being 2.5mm to 4.5 mm.

10. A burner comprising a fire cover as claimed in any one of claims 1 to 9.

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