CN111550789A

CN111550789A - Fire lid

Info

Publication number: CN111550789A
Application number: CN202010399337.XA
Authority: CN
Inventors: 苏慧玲; 郑军妹; 俞瑜; 严力峰
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-08-18
Anticipated expiration: 2040-05-12
Also published as: CN111550789B

Abstract

The invention discloses a fire cover, which comprises a first cover plate and a second cover plate, wherein a plurality of first fire holes are formed in the first cover plate; the second cover plate is provided with a plurality of second fire holes, the first cover plate covers the second cover plate, the diameters of the second fire holes are smaller than those of the first fire holes, and the plurality of second fire holes correspond to the single first fire hole. When the fire cover is in a small fire state, fuel gas is combusted through the second fire holes with relatively small diameters and relatively large number, the intensity of the fire holes is low, and tempering is avoided when the fire cover is in a minimum fire state; in a big fire state, the high-speed flowing gas generates flame separation relative to the second fire holes and is collected to the first fire holes with higher fire hole strength for burning; the minimum value of the fire hole intensity is determined by the size of the second fire hole, the maximum value of the fire hole intensity is determined by the size of the first fire hole, and the interval of the fire-adjustable range of the fire cover is obviously improved compared with a single-layer fire hole, so that the fire adaptability under different fire conditions is fully met.

Description

Fire lid

Technical Field

The invention relates to the field of kitchen range burners, in particular to a fire cover.

Background

On the fire lid of usual combustor, form the fire hole through the mode of trompil, to the fire hole, when the combustor was in big fire state, the fire hole load increase can lead to fire hole intensity too high for the fire hole is from the flame. When the burner is in a low fire condition, the reduced fire hole load may result in a fire hole having too low a strength, causing the fire hole to flashback.

Therefore, for the fire cover in the prior art, since the area of the fire hole is determined and limited by the intensity of the fire hole, the range of the maximum adjustable fire power is also determined, and in order to ensure that the fire power range of the burner is in a reasonable interval, the area of the fire hole on the inner ring fire cover is usually limited to a specific size range. When the maximum fire and the minimum fire are considered, the minimum fire of the inner ring is generally about 700W in the ideal state at present, the tempering is avoided, the maximum fire is generally about 1.5KW, and the flame is avoided.

That is, by changing the size of the fire hole and thus the fire hole area of the fire cover, the size of the maximum firepower and the minimum firepower can be changed, but the size of the section of the maximum adjustable firepower range cannot be changed. Therefore, how to enlarge the range of the maximum adjustable heating power range to enlarge the range of use of the burner becomes a key point of research by the prior art.

Disclosure of Invention

The invention provides a fire cover in order to enlarge the maximum adjustable fire power range of the fire cover.

The invention solves the technical problems through the following technical scheme:

the invention provides a fire cover which comprises a first cover plate and a second cover plate, wherein a plurality of first fire holes are formed in the first cover plate; the second cover plate is provided with a plurality of second fire holes, the first cover plate covers the second cover plate, the diameters of the second fire holes are smaller than those of the first fire holes, and the plurality of second fire holes correspond to the single first fire hole.

In the technical scheme, when the fire cover is in a small fire state, fuel gas is combusted through the second fire holes with relatively small diameters and relatively large quantity, the intensity of the fire holes is low, and tempering is avoided when the fire cover is in a minimum fire state; and when big fire state, the relative second fire hole of gas that flows at a high speed produces from the flame to collect the first fire hole department burning that fire hole intensity is higher, make the flame of a plurality of second fire holes assemble in a first fire hole, guaranteed the firepower of the flame of first fire hole. For the fire cover, the minimum value of the intensity of the fire holes is determined by the size of the second fire holes, and the maximum value of the intensity of the fire holes is determined by the size of the first fire holes, so that compared with the problem that the maximum adjustable fire range is not large enough due to the size limitation of the fire holes of a single-layer fire hole, the fire cover in the technical scheme is remarkably improved in the range size of the maximum adjustable fire range, and the fire adaptability under the conditions of different fire sizes is fully met.

Preferably, the second fire holes are uniformly formed in the second cover plate.

In this technical scheme, a plurality of second fire holes evenly set up on the second apron, are convenient for process, installation and guarantee the homogeneity of firepower.

Preferably, the second cover plate is overlapped with a partial area of the first cover plate.

In this technical scheme, the coincidence zone of second apron and first apron sets up according to firepower design needs in a flexible way.

Preferably, the thickness of the second fire hole in the axial direction is smaller than the thickness of the first fire hole in the axial direction.

In the technical scheme, the axial thickness of the second fire hole is smaller than that of the first fire hole, the second fire hole is a combustion surface in small fire, the working range is extremely small, no restriction is provided for the hole depth, and the second cover plate is preferably a thin mesh sheet so as to weaken the resistance of the second fire hole to airflow; when the fire is strong, the combustion surface is arranged in the first fire hole, the second fire hole can play a role of uniformly discharging air, and the resistance is small when the thickness of the second fire hole is small; in the case of a big fire, the combustion surface is located in the first fire hole, which is helpful to prolong the life of the second cover plate.

Preferably, the edge of the second cover plate forms a concave notch, and the notch is arranged close to the ignition needle.

In this technical scheme, through set up the breach near the ignition needle, make the air mobility near the ignition needle better, the ignition efficiency is higher.

Preferably, the cover plate further comprises a third cover plate, the second cover plate is clamped between the third cover plate and the first cover plate, and a plurality of through vent holes are formed in the third cover plate.

In this technical scheme, the third apron plays the effect of supporting first apron, second apron, and the air vent of third apron is used for carrying combustion-supporting air to first fire hole, second fire hole.

Preferably, the vent holes and the first fire holes are arranged in one-to-one correspondence.

In this technical scheme, the air vent sets up with first fire hole one-to-one, reaches better air transmission effect.

Preferably, the first cover plate comprises a first central region and a first extension region, the first extension region is arranged around the first central region, and an obtuse angle is formed between the first extension region and the first central region; the second cover plate comprises a second central area and a second extension area, the second extension area is arranged around the second central area, and an obtuse angle is formed between the second extension area and the second central area; the second central region coincides with the first central region.

In the technical scheme, the first cover plate is covered on the second cover plate, the first central area and the second central area can be overlapped, the relative positioning of the first cover plate and the second cover plate is automatically realized, other auxiliary positioning means are not needed, and the installation is convenient and accurate.

Preferably, the first central region is circular, and an included angle between the first extending region and the first central region is a fixed value; the second central area is circular, and an included angle between the second extending area and the second central area is a fixed value; the included angle between the first extending area and the first central area is equal to the included angle between the second extending area and the second central area.

In the technical scheme, the first cover plate and the second cover plate can rotate relatively through the shape of the first cover plate and the second cover plate, the angles of the first cover plate and the second cover plate can be adjusted, and the first cover plate and the second cover plate can be conveniently installed.

Preferably, the diameter of the first fire hole of the first extension area increases with the distance from the bottom of the pan.

In this technical scheme, because first extension region is the inclined plane, consequently need be according to the diameter of first fire hole of the distance adjustment between first fire hole and the bottom of a boiler, the position far away from the bottom of a boiler needs bigger firepower, needs the diameter of first fire hole bigger promptly to the firepower that makes the user perception is more even.

Preferably, the cover plate further comprises a third cover plate, the second cover plate being sandwiched between the third cover plate and the first cover plate; the third cover plate comprises a third central area and a third extending area, the third extending area is arranged around the third central area, and an obtuse angle is formed between the third extending area and the third central area; the third central region coincides with the second central region.

In the technical scheme, the second cover plate is covered on the third cover plate, the third central area is overlapped with the second central area, the relative positioning of the second cover plate and the third cover plate is automatically realized, other auxiliary positioning means are not needed, and the installation is convenient and accurate.

Preferably, the second central region is circular, and an included angle between the second extending region and the second central region is a fixed value; the third central area is circular, and an included angle between the third extending area and the third central area is a fixed value; and the included angle between the second extending area and the second central area is equal to the included angle between the third extending area and the third central area.

In the technical scheme, the second cover plate and the third cover plate can rotate relatively by the shape of the third cover plate, the angle of the second cover plate and the third cover plate can be adjusted, and the second cover plate and the third cover plate can be conveniently installed.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

Preferably, the diameter of the vent hole of the third extension area increases with the distance from the bottom of the pan.

In this technical scheme, because the third extension region is the inclined plane, consequently need adjust the diameter of air vent according to the distance between air vent and the bottom of a pot, the position far away from the bottom of a pot needs bigger firepower, needs the diameter of air vent bigger promptly to the firepower that makes the user perception is more even.

The positive progress effects of the invention are as follows:

when the fire cover is in a small fire state, fuel gas is combusted through the second fire holes with relatively small diameters and relatively large number, the intensity of the fire holes is low, and tempering is avoided when the fire cover is in a minimum fire state; in a big fire state, the high-speed flowing gas generates flame separation relative to the second fire holes and is collected to the first fire holes with higher fire hole strength for burning; the minimum value of the fire hole intensity is determined by the size of the second fire hole, the maximum value of the fire hole intensity is determined by the size of the first fire hole, and the interval of the fire-adjustable range of the fire cover is obviously improved compared with a single-layer fire hole, so that the fire adaptability under different fire conditions is fully met.

Drawings

Fig. 1 is a schematic structural view of a fire lid according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of another perspective view of the fire cover according to embodiment 1 of the present invention.

Fig. 3 is a sectional view of a fire lid of embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of a first cover plate of the fire cover according to embodiment 1 of the present invention.

Fig. 5 is a schematic structural view of a second cover plate of the fire cover according to embodiment 1 of the present invention.

Fig. 6 is a schematic structural view of a third cover plate of the fire cover according to embodiment 1 of the present invention.

Fig. 7 is a schematic structural view of a fire lid according to embodiment 2 of the present invention.

Description of the reference numerals

A first cover plate 1, a first fire hole 11, a first avoidance area 12, a first central area 13, a first extension area 14

A second cover plate 2, a second fire hole 21, a second central area 22, a second extension area 23, a gap 24

A third cover plate 3, a vent hole 31, a fixed seat 32, a second avoiding area 33, a third central area 34 and a third extending area 35

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

Fig. 1 to 6 show a fire lid of embodiment 1 of the present invention. The fire cover comprises a first cover plate 1 and a second cover plate 2, wherein a plurality of first fire holes 11 are formed in the first cover plate 1; the second cover plate 2 is provided with a plurality of second fire holes 21, the first cover plate 1 covers the second cover plate 2, the diameter of the second fire holes 21 is smaller than that of the first fire holes 11, and the plurality of second fire holes 21 correspond to the single first fire holes 11.

When the fire cover is in a small fire state, fuel gas is combusted through the second fire holes 21 with relatively small diameters and relatively large number, the intensity of the fire holes is low, and tempering is avoided when the fire cover is in a minimum fire state; and when the big fire state, the gas that flows at a high speed produces from the flame relative to second fire hole 21 to collect to the first fire hole 11 department that fire hole intensity is higher burns, make the flame of a plurality of second fire holes 21 assemble in a first fire hole 11, guaranteed the firepower of the flame of first fire hole 11, the minimum of fire hole intensity is decided by the size of second fire hole 21, the maximum of fire hole intensity is decided by the size of first fire hole 11, the interval of the adjustable firepower scope of fire lid has showing the improvement than the individual layer fire hole, in order to fully satisfy the firepower adaptability under different firepower circumstances.

The second cover plate 2 and the first cover plate 1 may overlap in a partial region or may overlap in all regions. The overlapping area of the second cover plate 2 and the first cover plate 1 is flexibly arranged according to the fire design requirement, namely, the second cover plate 2 can only overlap with the area of the first cover plate 1, which needs to adjust the fire.

In order to facilitate the processing, the installation and ensure the uniformity of firepower, a plurality of second fire holes 21 are uniformly arranged on the second cover plate 2. Because the plurality of second fire holes 21 of the second cover plate 2 are uniformly arranged, the problem of distance difference between the adjacent second fire holes 21 does not need to be considered in the processing process, and the processing process is simple; in addition, when mounting, since the second fire holes 21 are uniformly arranged, there is no need to particularly consider the positions of the second fire holes 21. Meanwhile, the second fire holes 21 are uniformly arranged, so that the uniformity of fire power can be ensured.

The thickness of the second fire hole 21 in the axial direction is smaller than the thickness of the first fire hole 11 in the axial direction. The thickness of the second fire hole 21 along the axial direction is smaller than that of the first fire hole 11 along the axial direction, the second fire hole 21 is a combustion surface in small fire, the working range is extremely small, and no description is given on the depth of the hole. Therefore, the second cover plate 2 is preferably a thin mesh to weaken the resistance of the second fire holes 21 to the air flow. When the fire is strong, the combustion surface is arranged in the first fire holes 11, the second fire holes 21 can play a role of uniformly discharging air, and the resistance is small when the thickness of the second fire holes 21 is small; in case of a big fire, the burning surface is located at the first fire hole 11, which helps to prolong the life of the second cover plate 2.

As shown in fig. 2 to 3, the cover plate further includes a third cover plate 3, the second cover plate 2 is sandwiched between the third cover plate 3 and the first cover plate 1, and the third cover plate 3 is provided with a plurality of through vents 31. The second cover plate 2 covers the third cover plate 3, the first cover plate 1 covers the second cover plate 2, and the third cover plate 3 plays a role in supporting the first cover plate 1 and the second cover plate 2.

The vent holes 31 of the third cover plate 3 are used for delivering combustion-supporting air to the first fire holes 11 and the second fire holes 21. In order to achieve a better air transmission effect, the vent holes 31 are provided in one-to-one correspondence with the first fire holes 11.

Wherein, the surface of the third cover plate 3 far away from the second cover plate 2 is provided with a fixing seat 32, and the fixing seat 32 is used for installing the third cover plate 3 on the base of the burner.

As shown in fig. 4, the edge of the first cover plate 1 is provided with a first avoidance region 12 which is concave inwards; as shown in fig. 6, the edge of the third cover plate 3 is provided with a second escape area 33 recessed inward. As shown in fig. 1 to 3, the first avoidance area 12 and the second avoidance area 33 correspond in position, and the first avoidance area 12 and the second avoidance area 33 form an installation space for installing the pilot chute.

As shown in fig. 4, the first cover plate 1 includes a first central region 13 and a first extension region 14, the first extension region 14 is disposed around the first central region 13, and the first extension region 14 forms an obtuse angle with the first central region 13; as shown in fig. 5, the second cover plate 2 includes a second central region 22 and a second extended region 23, the second extended region 23 is disposed around the second central region 22, and an obtuse angle is formed between the second extended region 23 and the second central region 22; the second central region 22 coincides with the first central region 13.

As shown in fig. 3, when the first cover plate 1 is covered on the second cover plate 2, the first central area 13 and the second central area 22 can coincide with each other, so that the relative positioning of the first cover plate 1 and the second cover plate 2 is automatically realized, and the installation is convenient and accurate without auxiliary positioning means.

Specifically, the first central region 13 is circular, the first extension region 14 is formed by surrounding the side surface of a circular truncated cone, and the upper edge of the first extension region 14 (the edge of the upper bottom surface of the circular truncated cone having a smaller diameter) coincides with the edge of the first central region 13; the second central area 22 is circular, the second extending area 23 is formed by encircling the side surface of the circular truncated cone, and the upper edge of the second extending area 23 (the edge of the upper bottom surface with smaller diameter of the circular truncated cone) is overlapped with the edge of the second central area 22; the angle between the first extension area 14 and the first central area 13 and the angle between the first extension area 14 and the first central area 13 are equal. Through the shape of the first cover plate 1 and the second cover plate 2, the first cover plate 1 and the second cover plate 2 can rotate relatively, the angle of the first cover plate 1 and the angle of the second cover plate 2 can be adjusted, and the first cover plate 1 and the second cover plate 2 can be conveniently installed.

The first extension area 14 and the second extension area 23 are not limited to be truncated cone-shaped, and as long as the included angle between the first extension area 14 and the first central area 13 is a fixed value and the included angle between the second extension area 23 and the second central area 22 is a fixed value, the purpose that the first cover plate 1 can rotate relative to the second cover plate 2 after covering the second cover plate can be achieved.

The diameter of the first fire hole 11 of the first extension area 14 increases with the distance from the bottom of the pan. Since the first extension area 14 is an inclined surface, the diameter of the first fire hole 11 needs to be adjusted according to the distance between the first fire hole 11 and the pan bottom, and a position farther from the pan bottom needs greater fire, that is, the diameter of the first fire hole 11 needs to be greater, so that the fire perceived by the user is more uniform.

As shown in fig. 6, the third cover plate 3 includes a third central region 34 and a third extended region 35, the third extended region 35 is disposed around the third central region 34, and an obtuse angle is formed between the third extended region 35 and the third central region 34; the third central region 34 coincides with the second central region 22.

As shown in fig. 3, the second cover plate 2 is covered on the third cover plate 3, and the third central area 34 coincides with the second central area 22, so that the relative positioning of the second cover plate 2 and the third cover plate 3 is automatically realized; the first cover plate 1 is covered on the second cover plate 2, the first central area 13 is overlapped with the second central area 22, the relative positioning of the first cover plate 1 and the second cover plate 2 is automatically realized, other auxiliary positioning means are not needed, and the installation is convenient and accurate.

Specifically, the third central region 34 is circular, the third extended region 35 is formed by surrounding the side surface of the circular truncated cone, the upper edge of the third extended region 35 (the edge of the upper bottom surface of the circular truncated cone having a smaller diameter) coincides with the edge of the third central region 34, and the angle between the second extended region 23 and the second central region 22 is equal to the angle between the third extended region 35 and the third central region 34. Through the setting of the shape of the third cover plate 3, the second cover plate 2 and the third cover plate 3 can rotate relatively, the angles of the second cover plate 2 and the third cover plate 3 can be adjusted, and the installation of the second cover plate 2 and the third cover plate 3 is facilitated.

The third extending area 35 is not limited to be a truncated cone, and as long as the included angle between the third extending area 35 and the third central area 34 is a fixed value, the purpose that the second cover plate 2 can still rotate relative to the third cover plate 3 after covering the third cover plate can be achieved.

The diameter of the vent hole 31 of the third extension area 35 increases with increasing distance from the bottom of the pan. Since the third extending region 35 is an inclined surface, the diameter of the vent hole 31 needs to be adjusted according to the distance between the vent hole 31 and the pan bottom, and a position farther from the pan bottom needs greater firepower, that is, the diameter of the vent hole 31 needs to be greater, so that the firepower perceived by the user is more uniform.

Example 2

Fig. 7 shows embodiment 2 of the fire lid of the present invention. Most of the structure of the fire lid of embodiment 2 is the same as that of embodiment 1 except that: the edge of the second cover plate 2 forms a recessed notch 24, and the notch 24 is disposed near an ignition needle (not shown) of the burner. Through setting up breach 24 near the ignition needle to the air gets into the region at ignition needle place through breach 24, makes the air mobility near the ignition needle better, and the ignition efficiency is higher.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A fire lid, comprising:

the first cover plate is provided with a plurality of first fire holes;

the second apron, be equipped with a plurality of second fire holes on the second apron, first apron lid is in on the second apron, the diameter in second fire hole is less than the diameter in first fire hole, a plurality of second fire holes correspond single first fire hole.

2. The fire cover of claim 1, wherein: a plurality of second fire holes are uniformly formed in the second cover plate.

3. The fire cover of claim 1 or 2, wherein: the second cover plate is overlapped with a partial area of the first cover plate.

4. The fire cover of claim 1 or 2, wherein: the thickness of the second fire hole along the axial direction is smaller than that of the first fire hole along the axial direction.

5. The fire cover of claim 1, wherein: the edge of the second cover plate forms a concave notch, and the notch is arranged close to the ignition needle.

6. The fire cover of claim 1, wherein: the cover plate further comprises a third cover plate, the second cover plate is clamped between the third cover plate and the first cover plate, and a plurality of through air holes are formed in the third cover plate.

7. The fire cover of claim 6, wherein: the vent holes are arranged in one-to-one correspondence with the first fire holes.

8. The fire cover of claim 1, wherein: the first cover plate comprises a first central area and a first extension area, the first extension area is arranged around the first central area, and an obtuse angle is formed between the first extension area and the first central area; the second cover plate comprises a second central area and a second extension area, the second extension area is arranged around the second central area, and an obtuse angle is formed between the second extension area and the second central area; the second central region coincides with the first central region.

9. The fire cover of claim 8, wherein: the first central area is circular, and an included angle between the first extending area and the first central area is a fixed value; the second central area is circular, and an included angle between the second extending area and the second central area is a fixed value; the included angle between the first extending area and the first central area is equal to the included angle between the second extending area and the second central area.

10. The fire cover of claim 8, wherein: the diameter of the first fire hole of the first extension area increases with the distance from the bottom of the pan.

11. The fire cover of claim 8, wherein: the cover plate further comprises a third cover plate, the second cover plate being sandwiched between the third cover plate and the first cover plate; the third cover plate comprises a third central area and a third extending area, the third extending area is arranged around the third central area, and an obtuse angle is formed between the third extending area and the third central area; the third central region coincides with the second central region.

12. The fire cover of claim 11, wherein: the second central area is circular, and an included angle between the second extending area and the second central area is a fixed value; the third central area is circular, and an included angle between the third extending area and the third central area is a fixed value; and the included angle between the second extending area and the second central area is equal to the included angle between the third extending area and the third central area.

13. The fire cover of claim 11, wherein: the diameter of the vent hole of the third extension area increases with the distance from the bottom of the pan.