CN116951476A

CN116951476A - Kitchen range

Info

Publication number: CN116951476A
Application number: CN202310923334.5A
Authority: CN
Inventors: 郭达; 俞瑜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2023-10-27

Abstract

The invention relates to the field of stoves and provides a stove which comprises a temperature sensor, an inner ring fire cover, a first gas channel and a second gas channel which are isolated from each other, wherein the gas supply amount of the first gas channel is smaller than that of the second gas channel, the inner ring fire cover is provided with a first fire port and a second fire port, the first fire port is communicated with the first gas channel, the second fire port is communicated with the second gas channel, the first fire port is positioned below at least part of the second fire port, the first fire port is communicated with a space on the side part of the inner ring fire cover, the upper part of the first fire port is shielded by the inner ring fire cover in the vertical projection direction, the middle part of the inner ring fire cover is provided with a mounting hole, the temperature sensor is arranged in the mounting hole and positioned above the inner ring fire cover, the air in the side part space of the inner ring fire cover is heated by flame of the first fire port, and the heat is transmitted to a pot by the air, so that the accuracy of the temperature sensor can be prevented from being influenced by the flame of the first fire port for a long time.

Description

Kitchen range

Technical Field

The invention relates to the field of stoves.

Background

In some gas cookers, a temperature sensor is provided to detect the temperature at the bottom of the cookware, so as to control the power of the cookers. When the small fire is used for a long time, for example, the small fire is used for boiling soup, decocting medicinal herbs and the like for four to five hours, or eight to nine hours, or longer, the false alarm of the temperature sensor can be caused, and the working accuracy of the temperature sensor is affected.

Disclosure of Invention

The invention aims to overcome the defect of poor accuracy of a temperature sensor of a stove in the prior art, and provides the stove.

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

a cooktop, comprising:

a first gas passage and a second gas passage isolated from each other;

the inner ring fire cover is provided with a first fire hole and a second fire hole, the first fire hole is communicated with the first gas channel, the second fire hole is communicated with the second gas channel, the total amount of gas at the first fire hole is smaller than that at the second fire hole, the first fire hole is positioned below at least part of the second fire hole, the first fire hole is communicated with the space at the side part of the inner ring fire cover, and in the vertical projection direction, the upper part of the first fire hole is blocked by the inner ring fire cover, and the middle part of the inner ring fire cover is provided with a mounting hole;

the temperature sensor is arranged in the mounting hole and is positioned above the inner ring fire cover.

In the scheme, the second fuel gas channel is communicated with the second fire port to provide small fire; the first gas channel is communicated with the first fire hole, and provides ultra-small fire with power smaller than that of the small fire, so that the ultra-small fire can be used for long-time use of working conditions of the ultra-small fire, such as ten hours for soup cooking. The temperature sensor is arranged above the inner ring fire cover, so that the temperature above the inner ring fire cover is detected. By arranging the first fire port below at least part of the second fire port, on one hand, the position of the second fire port is ensured to be close enough to the bottom of the cooker so as to ensure small fire power; on the other hand, the position of the first fire port may be lowered to increase the height difference between the first fire port and the temperature sensor. The upper part of the first fire hole is shielded by the inner ring fire cover, and the space between the first fire hole and the side part of the inner ring fire cover is communicated, so that the heat is transmitted out from the side part of the inner ring fire cover by the ultra-small fire; the flame of the ultra-small fire is prevented from directly irradiating the temperature sensor. Through the position setting of the first fire port, when the ultra-small fire is used, the air in the side space of the inner ring fire cover is heated through the flame of the ultra-small fire, and then the heat is transmitted to the cooker through the air, so that on one hand, the power requirement of a user on the ultra-small fire can be met; on the other hand, the temperature sensor can be prevented from being influenced by the fact that the temperature sensor is irradiated by the flame of the ultra-small fire for a long time.

Preferably, the aperture of the first fire hole is 1.0 mm-1.6 mm, the total gas flow at the first fire hole is 0.0159-0.0265 cubic meters per hour, the combustion intensity at the first fire hole is less than 6.2KW/mm, and the total power of combustion at the first fire hole is 150-250W.

In this scheme, through aperture, burning intensity, the gas flow of control first burner for the gross power of first burner department burning is 150W ~ 250W, makes the extra-small fire that first burner provided enough little.

Preferably, the first gas passage is used for supplying gas alone and for supplying gas simultaneously with the second gas passage.

In this scheme, so set up, can use the ultra-small fire alone, use the ultra-small fire simultaneously plus little fire. And the relative positions of the first fire port and the second fire port are set, so that when the flame of the first fire port can ignite the gas at the second fire port, the ultra-small fire and the small fire are simultaneously used, and the ultra-small fire can play roles in igniting the small fire and maintaining the flame stabilization of the small fire.

Preferably, the inner ring fire cover is further provided with a bypass fire hole, and the bypass fire hole is communicated with the second fuel gas channel and the first fire hole.

In this technical scheme, so set up for the second gas passageway is for the second burner air feed, also can be for first burner air feed simultaneously, the gas of second burner is lighted to the flame of the first burner of being convenient for and makes the flame of second burner stable.

Preferably, the side surface of the inner ring fire cover is provided with a groove, the first fire port is arranged in the groove, and at least part of the second fire port is arranged above the groove.

In this technical scheme, first fire hole sets up in the recess, and the second fire hole sets up in the top of recess, and the gas of second fire hole is lighted to the flame of the first fire hole of being convenient for, and the flame of the first fire hole of also being convenient for makes the flame of second fire hole stable.

Preferably, at least part of the openings of the first fire ports face upwards, and at least part of the second fire ports above the grooves are located on the side face of the inner ring fire cover and the openings of the second fire ports are obliquely upwards.

In this scheme, the opening of first fire hole up, the opening of second fire hole upwards to one side, the homoenergetic makes the effect of extra-small fire to the ignition of little fire and steady flame further improve, and the second fire hole is located the side of inner ring fire lid, and the extra-small fire of first fire hole department of being convenient for ignites the gas of second fire hole department from the side.

Preferably, a first fire cover channel and a second fire cover channel which are isolated from each other are arranged in the inner ring fire cover;

the first fire cover channel is communicated with the first gas channel, a first fire hole is formed in the wall surface of the first fire cover channel, and an opening, far away from the first fire cover channel, of the first fire hole is the first fire hole;

the fire cover second channel is communicated with the second fuel gas channel, the wall surface of the fire cover second channel is provided with the bypass fire hole and the straight-through fire hole, and the opening, far away from the fire cover second channel, of the straight-through fire hole is the second fire hole.

Preferably, the kitchen range further comprises a burner and a distributor seat, wherein a first burner channel and a second burner channel which are isolated from each other are arranged in the burner, and a first distributor channel and a second distributor channel which are isolated from each other are arranged in the distributor seat;

the first gas channel, the first distributor channel, the first furnace end channel and the first fire cover channel are sequentially communicated;

the second gas channel, the distributor second channel, the furnace end second channel and the fire cover second channel are sequentially communicated.

Preferably, the cooker further comprises an outer ring fire cover and a third gas channel, the inner ring fire cover is arranged in the middle of the outer ring fire cover, a third fire port is arranged on the outer ring fire cover, the third fire port is communicated with the third gas channel, and the total gas quantity at the third fire port is larger than that at the second fire port.

In this scheme, the third fire hole is used for providing big fire, and power is greater than the little fire that the second fire hole provided.

Preferably, the outer ring fire cover is completely arranged around the side surface of the inner ring fire cover.

In this scheme, through the shielding of outer ring fire lid, avoid the outer air current of outer ring fire lid to cover the space between first fire hole department to temperature sensor with the flame temperature transmission of inner fire to avoid the flow of air, thereby avoid influencing temperature sensor's accuracy.

The invention has the positive progress effects that:

the second fuel gas channel is communicated with the second fire hole to provide small fire; the first gas channel is communicated with the first fire hole, and provides ultra-small fire with power smaller than that of the small fire, so that the ultra-small fire can be used for long-time use of working conditions of the ultra-small fire, such as ten hours for soup cooking. The temperature sensor is arranged above the inner ring fire cover, so that the temperature above the inner ring fire cover is detected. By arranging the first fire port below at least part of the second fire port, on one hand, the position of the second fire port is ensured to be close enough to the bottom of the cooker so as to ensure small fire power; on the other hand, the position of the first fire port may be lowered to increase the height difference between the first fire port and the temperature sensor. The upper part of the first fire hole is shielded by the inner ring fire cover, and the space between the first fire hole and the side part of the inner ring fire cover is communicated, so that the heat is transmitted out from the side part of the inner ring fire cover by the ultra-small fire; the flame of the ultra-small fire is prevented from directly irradiating the temperature sensor. Through the position setting of the first fire port, when the ultra-small fire is used, the air in the side space of the inner ring fire cover is heated through the flame of the ultra-small fire, and then the heat is transmitted to the cooker through the air, so that on one hand, the power requirement of a user on the ultra-small fire can be met; on the other hand, the temperature sensor can be prevented from being influenced by the fact that the temperature sensor is irradiated by the flame of the ultra-small fire for a long time.

Drawings

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

FIG. 2 is a schematic view of the internal structure of a stove according to an embodiment of the present invention;

FIG. 3 is a schematic view of a part of a stove according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a part of a stove according to an embodiment of the present invention;

FIG. 5 is an exploded view of a part of a stove according to an embodiment of the present invention;

FIG. 6 is a schematic top view of a part of a stove according to an embodiment of the present invention;

FIG. 7 is a fragmentary section view of section A-A of FIG. 6;

FIG. 8 is a fragmentary section view of section B-B of FIG. 6;

FIG. 9 is a schematic view of a part of a stove according to an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a burner according to an embodiment of the present invention;

FIG. 11 is a schematic top view of a burner according to an embodiment of the present invention;

FIG. 12 is a schematic bottom view of a burner according to an embodiment of the present invention;

FIG. 13 is a schematic perspective view of an inner ring fire cover according to an embodiment of the present invention;

FIG. 14 is a schematic cross-sectional view of an inner ring fire cover according to an embodiment of the present invention;

FIG. 15 is a schematic cross-sectional view of an inner ring fire cover according to an embodiment of the present invention;

FIG. 16 is a schematic top view of an inner ring fire cover according to an embodiment of the present invention;

FIG. 17 is a cross-sectional view C-C of FIG. 16;

fig. 18 is a schematic diagram of an installation structure of a temperature sensor according to an embodiment of the invention.

Reference numerals illustrate:

kitchen range 10000

An inner ring fire cover 1;

a fire cover first passage 111, a fire cover second passage 112;

a first fire hole 121; a second fire hole 122, a bypass fire hole 1221, and a through fire hole 1222;

a first fire port 131; a second fire port 132, a first bypass fire port 1321, a second bypass fire port 1322, and a straight through fire port 1323;

mounting holes 141, grooves 142, side spaces 143;

an outer ring fire cover 2 and a third fire port 21;

a burner 3, a first burner channel 31, a second burner channel 32, a third burner channel 33;

the distributor base 4, the distributor first channel 41, the distributor second channel 42, the distributor third channel 43;

a first gas passage 61, a second gas passage 62, a third gas passage 63;

a temperature sensor 71, a protective cover 72 and a spring 73.

Detailed Description

The invention is further illustrated by means of examples which follow, without thereby restricting the scope of the invention thereto.

Fig. 1 to 18 are schematic structural diagrams of a stove 10000 according to an embodiment of the present invention.

As shown in fig. 1-4, the cooktop 10000 includes:

a first gas passage 61 and a second gas passage 62 isolated from each other as shown in fig. 2;

13-17, a first fire hole 131 and a second fire hole 132 are formed in the inner ring fire cover 1, the first fire hole 131 is communicated with the first gas channel 61 and is used for providing ultra-small fire, the second fire hole 132 is communicated with the second gas channel 62 and is used for providing small fire, the total amount of gas at the first fire hole 131 is smaller than that at the second fire hole 132, the power of the ultra-small fire is smaller than that of the small fire, the first fire hole 131 is located below at least part of the second fire hole 132, the first fire hole 131 is communicated with a lateral space 143 at the lateral part of the inner ring fire cover 1, in the projection of the vertical direction H, the upper part of the first fire hole 131 is blocked by the inner ring fire cover 1, and a mounting hole 141 is formed in the middle of the inner ring fire cover 1;

as shown in fig. 3 and 18, the temperature sensor 71 is provided in the mounting hole 141 and above the inner ring fire cover 1.

The ultra-small fire can be used for long-time working conditions of using enough small fire, such as ten hours of soup cooking. By providing the temperature sensor 71 above the inner ring fire cover 1, the temperature above the inner ring fire cover 1 and below the cookware is detected. By arranging the first fire port 131 below at least part of the second fire port 132, on one hand, the position of the second fire port 132 can be ensured to be close enough to the bottom of the cooker to ensure small fire power; on the other hand, the position of the first fire port 131 may be lowered to increase the height difference between the first fire port 131 and the temperature sensor 71. The upper part of the first fire hole 131 is shielded by the inner ring fire cover 1, and the space between the first fire hole 131 and the side part of the inner ring fire cover 1 is communicated, so that the heat is spread out by the ultra-small fire from the side part of the inner ring fire cover 1; the flame of the ultra small fire is prevented from directly illuminating the temperature sensor 71. Through the position setting of the first fire hole 131, when the ultra-small fire is used, the air in the side space 143 of the inner ring fire cover 1 is heated through the flame of the ultra-small fire, and then the heat is transmitted to the cooker through the air, so that on one hand, the power requirement of a user on the ultra-small fire can be met; on the other hand, it is possible to avoid that the flame of the ultra-small fire irradiates the temperature sensor 71 for a long time to affect the accuracy of the temperature sensor 71.

As shown in fig. 13 to 17, the inner ring fire cover 1 is provided with:

a groove 142;

a fire cover first passage 111 and a fire cover second passage 112 which are isolated from each other;

the first fire hole 121, the second fire hole 122 isolated from each other, the second fire hole 122 includes a bypass fire hole 1221, a through fire hole 1222; the opening of the first fire hole 121 communicating with the side space 143 is a first fire hole 131; the opening of the second fire hole 122, which is communicated with the side space 143, is a second fire hole 132, the second fire hole 132 comprises a first bypass fire hole 1321, a second bypass fire hole 1322 and a through fire hole 1323, specifically, the opening of the through fire hole 1222, which is close to the side space 143, is a through fire hole 1323, and the through fire hole 1323 is located above the groove 142; the bypass fire hole 1221 and the groove 142 are communicated with each other through a first bypass fire hole 1321, and the first bypass fire hole 1321 and the first fire hole 131 are positioned on the side wall of the groove 142 and are communicated with each other; the bypass fire hole 1221 also has a second bypass fire hole 1322, and the second bypass fire hole 1322 and the through fire hole 1323 are located above the groove 142 and are mutually communicated.

Because the first bypass fire port 1321 and the first fire port 131 are both located in the groove 142 and are close to each other, the second gas channel 62 supplies the gas of the first bypass fire port 1321, which can be ignited by the flame of the first fire port 131 on the one hand, and can flow to the first fire port 131 to be burnt at the first fire port 131 on the other hand.

The four fire ports, namely the straight fire port 1323, the second bypass fire port 1322, the first bypass fire port 1321 and the first fire port 131, are sequentially arranged from top to bottom, and one fire port is provided with one circle, and a plurality of fire ports are arranged in each circle; the first bypass fire port 1321 and the first fire port 131 are positioned on the side wall of the groove 142 and are communicated with each other; the second bypass fire port 1322 and the through fire port 1323 are positioned above the groove 142 and are communicated with each other; so that the flame at the first fire hole 131 can ignite the fuel gas at the first bypass fire hole 1321, the second bypass fire hole 1322 and the straight-through fire hole 1323, the fuel gas at the first fire hole 131 can play a role in ignition, and the flame at the first fire hole 131 can play a role in stabilizing flame because the power of the fuel gas combustion at the first fire hole 131 is smaller, i.e. the ultra-small fire can play a role in igniting the small fire and stabilizing the small fire flame.

Further, the openings of the first fire port 131 face upwards, and the openings of the second bypass fire port 1322 and the through fire port 1323 face upwards obliquely, so that the effects of the ultra-small fire on the ignition and flame stabilization of the small fire are further improved.

In other embodiments, the second fire hole 122 may be provided with only the through fire hole 1222 or the bypass fire hole 1221. The three second flame ports 132, i.e., the through flame port 1323, the second bypass flame port 1322, and the first bypass flame port 1321, may not be provided with the first bypass flame port 1321, and the through flame port 1323 and the second bypass flame port 1322 may be provided with only one.

Optionally, as shown in fig. 2-4, the stove 10000 further includes an outer ring fire cover 2 and a third gas channel 63, the inner ring fire cover 1 is disposed in the middle of the outer ring fire cover 2, the outer ring fire cover 2 is provided with a third fire port 21, the third fire port 21 is communicated with the third gas channel 63, the third fire port 21 is used for providing big fire, the total amount of gas at the third fire port 21 is greater than the total amount of gas at the second fire port 132, so that the power of the big fire is greater than the power of the small fire provided by the second fire port 132.

Further, the outer ring fire cover 2 is completely arranged around the side surface of the inner ring fire cover 1, and the opposite side walls of the inner ring fire cover 1 and the outer ring fire cover 2 jointly define the side space 143. By shielding the outer ring fire cover 2, air outside the outer ring fire cover 2 is prevented from flowing through the space between the outer ring fire cover 2 and the inner ring fire cover 1, so that flame temperature at the first fire hole 131 on the inner ring fire cover is prevented from being transmitted to the temperature sensor 71 by air flowing, and the accuracy of the temperature sensor 71 is prevented from being influenced.

Optionally, as shown in fig. 3-8, the stove 10000 further comprises a burner 3 and a distributor base 4; as shown in fig. 9, the distributor base 4 is provided with a first distributor channel 41, a second distributor channel 42 and a third distributor channel 43 which are isolated from each other; as shown in fig. 10-12, a first channel 31, a second channel 32 and a third channel 33 are arranged in the burner 3; as shown in fig. 2 and fig. 4-7, the first gas channel 61, the first distributor channel 41, the first burner channel 31, the first fire cover channel 111 and the first fire port 131 are sequentially communicated, and gas is provided for the first fire port 131 so as to provide ultra-small fire; the second gas channel 62, the distributor second channel 42, the furnace end second channel 32, the fire cover second channel 112 and the second fire hole 132 are sequentially communicated, and gas is provided for the second fire hole 132 so as to provide small fire; as shown in fig. 2, 7 and 8, the second gas passage 62, the distributor second passage 42, the burner second passage 32 and the third fire port 21 are sequentially communicated to supply gas to the third fire port 21 to provide a strong fire.

Alternatively, the first gas passage 61 is used for supplying gas alone, and for supplying gas simultaneously with the second gas passage 62. By the arrangement, the ultra-small fire can be independently used at the same time or the ultra-small fire and the small fire can be simultaneously used. When the ultra-small fire and the small fire are used at the same time, the ultra-small fire is convenient to ignite the small fire and maintain the flame stabilization of the small fire.

Specifically, in this embodiment, the stove 10000 further includes a gas valve, the gas valve includes a valve core and a valve body, the valve core is disposed in the valve body, a fire groove for communicating with a gas pipeline is disposed on the valve core, a communication hole is disposed on the valve body, and the fire groove on the valve core is communicated with the communication hole by rotating the valve core, so as to supply gas to the stove 10000. In this embodiment, the fire grooves include a first fire groove, a second fire groove, and a third fire groove that are isolated from each other, and the communication holes include a first communication hole, a second communication hole, and a third communication hole; when the valve core rotates 0-180 degrees, the gas pipeline, the first fire groove, the first communication hole, the first gas channel 61 and the first fire hole 131 can be communicated in sequence to provide ultra-small fire gas; when the valve core rotates 60-120 degrees, the gas pipeline, the second fire groove, the second communication hole, the second gas channel 62 and the second fire hole 132 can be communicated in sequence to provide gas with small fire; when the valve core rotates 90-180 degrees, the gas pipeline, the third fire groove, the third communication hole, the third gas channel 63 and the third fire port 21 can be communicated in sequence to provide gas with big fire. How to realize the rotation of the valve core to enable the fire groove of the valve core to be communicated with the communication hole on the valve body so as to provide fuel gas is the prior art.

In the embodiment, the range of the air supply angle of the fire groove corresponding to the ultra-small fire completely covers and exceeds the range of the air supply fire groove corresponding to the small fire and the big fire, so that the ultra-small fire is singly used at the same time, or the ultra-small fire or the small fire is simultaneously used, or the ultra-small fire and the big fire are simultaneously used; by setting the overlapping of the air supply angle ranges of the fire grooves corresponding to the ultra-small fire, the small fire and the big fire, the ultra-small fire, the small fire and the big fire can be used at the same time. In other embodiments, the on-off of the first gas channel 61 and the second gas channel 62 can be controlled by setting control valves, so that the first gas channel 61 can provide gas independently at the same time, or the first gas channel 61 and the second gas channel 62 can provide gas simultaneously, and the ultra-small fire can be used independently at the same time, or the ultra-small fire and the small fire can be used simultaneously.

Specifically, in this embodiment, the first fire hole 131 is circular, the diameter is 1.0 mm-1.6 mm, the total gas flow at the first fire hole 131 is 0.0159-0.0265, the combustion intensity at the first fire hole is less than 6.2KW/mm, and the maximum total power of combustion at the first fire hole 131 is 150W-250W, so that the ultra-small fire is small enough; the total gas flow at the second burner 132 is 0.159 and the total power burned is about 1500W; the total gas flow of the third burner 21 was 0.370 and the total power of combustion was about 3500W. The gas flow is in units of cubic meters per hour. Because the ultra-small fire and the small fire can be used simultaneously, the flame of the ultra-small fire can ignite the small fire, and the flame of the small fire can be stabilized in the process of adjusting the small fire, so that the small fire is well adjusted. The ultra-small fire, the small fire and the large fire can be used simultaneously, so that the maximum total power which can be provided by the kitchen range 10000 is 5000W+ (150W-250W), and the maximum fire power is large enough. The control of gas flow, combustion intensity and combustion power is the prior art.

Further, the ultra-small fire provided by the first fire port 131 is a long-term open fire with fixed flow, the small fire provided by the second fire port 132 is adjusted in 3 stages, and the big fire provided by the third fire port 21 is adjusted in 4-6 stages, so that multi-stage combination of multiple fire powers is realized, and different fire using requirements are met. How to realize the long-term open fire and how to realize the fire classification are all in the prior art.

The total amount of fuel gas and the flow rate of fuel gas at a certain place are the total flow rate of fuel gas at the certain place. In other embodiments, the aperture anywhere in the gas flow path may be adjusted to achieve a desired gas flow.

Optionally, as shown in fig. 3 and 18, a plurality of protective covers 72 are arranged on the outer side of the temperature sensor 71, each protective cover 72 is sleeved in sequence, each protective cover 72 is installed through a spring 73, when the cooker is placed on the cooker 10000, each protective cover 72 is attached to the bottom of the cooker through the expansion and contraction of the spring 73 so as to adapt to different cookers, and the temperature below the cooker bottom detected by the temperature sensor 71 is accurate.

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 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 principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims

1. A cooktop, characterized in that it comprises:

a first gas passage and a second gas passage isolated from each other;

2. The cooktop of claim 1, wherein the aperture of the first burner is 1.0mm to 1.6mm, the total gas flow at the first burner is 0.0159 cubic meters per hour to 0.0265 cubic meters per hour, the combustion intensity at the first burner is less than 6.2KW/mm, and the total power of combustion at the first burner is 150W to 250W.

3. The cooktop of claim 1, wherein the first gas channel is for providing gas alone and for providing gas simultaneously with the second gas channel.

4. The cooktop of claim 1, wherein the inner ring fire cover is further provided with a bypass fire hole that communicates the second gas passage with the first fire port.

5. The cooktop of claim 4, wherein the side of the inner ring fire cover has a recess, the first fire port is disposed in the recess, and at least a portion of the second fire port is disposed above the recess.

6. The cooktop of claim 5, wherein at least a portion of the first fire ports are open upward, at least a portion of the second fire ports above the recess are located on the side of the inner ring fire cover and open obliquely upward.

7. The cooking appliance of claim 4, wherein the inner annular fire cover is internally provided with a fire cover first channel and a fire cover second channel which are isolated from each other;

8. The cooking utensils of claim 7, further comprising a burner and a distributor base, wherein the burner is provided with a first burner channel and a second burner channel which are isolated from each other, and the distributor base is provided with a first distributor channel and a second distributor channel which are isolated from each other;

9. The cooktop of any of claims 1-8, further comprising an outer ring fire cover and a third gas channel, wherein the inner ring fire cover is disposed in the middle of the outer ring fire cover, a third fire port is disposed on the outer ring fire cover, the third fire port is communicated with the third gas channel, and the total amount of gas at the third fire port is greater than the total amount of gas at the second fire port.

10. The cooktop of claim 9, wherein the outer annular flame cover is disposed entirely around the sides of the inner annular flame cover.