Combustor and gas stove
Technical Field
The invention relates to the technical field of cookers, in particular to a burner and a gas stove.
Background
The gas cooker is a kitchen cooking appliance necessary for daily life of a family, and the combustor is used as an air inlet part of the cooker and can directly influence the combustion working condition so as to influence the performance of the cooker.
At present, a nozzle seat of a plurality of burners is provided with two air supply channels which are not communicated with each other and respectively correspond to outer ring fire and inner ring fire of the burners, so that the outer ring fire and the inner ring fire cannot be synchronously increased or decreased when a user adjusts firepower, the flame uniformity of the burners is poor, and the cooking effect is influenced.
Disclosure of Invention
The invention aims to provide a burner and a gas stove, and aims to solve the technical problem that in the prior art, the uniformity of flame of the burner is poor.
The burner provided by the invention comprises a burner and a nozzle seat, wherein the burner comprises an outer ring structure and a central structure, the outer ring structure is arranged around the outer side of the central structure, the outer ring structure comprises an outer ring distribution air passage and an outer ring injection pipe, the air outlet of the outer ring injection pipe is communicated with the outer ring distribution air passage, the central structure comprises a central distribution air passage and a central injection pipe, and the air outlet of the central injection pipe is communicated with the central distribution air passage;
the nozzle seat is internally provided with a first gas supply channel which is communicated with an outer ring nozzle and a central nozzle, the outer ring nozzle is opposite to the gas inlet of the outer ring injection pipe, and the central nozzle is opposite to the gas inlet of the central injection pipe.
The central distribution air passage comprises a first central distribution air passage and a second central distribution air passage, the central injection pipe comprises a first central injection pipe and a second central injection pipe, and the central nozzle comprises a first central nozzle and a second central nozzle;
the first central distribution air passage is arranged around the outer side of the second central distribution air passage, the air outlet of the first central nozzle is opposite to the air inlet of the first central injection pipe, and the air outlet of the first central injection pipe is communicated with the first central distribution air passage;
the air outlet of the second central nozzle is opposite to the air inlet of the second central injection pipe, and the air outlet of the second central injection pipe is communicated with the second central distribution air passage;
the first central nozzle and/or the second central nozzle communicate with the first gas supply channel.
Furthermore, a second air supply channel is also arranged on the nozzle seat;
the first central nozzle is communicated with the first air supply channel, and the second central nozzle is communicated with the second air supply channel.
Further, the outer ring nozzle, the first center nozzle and the second center nozzle are all arranged on the top surface of the nozzle seat facing the furnace end, and the outer ring nozzle, the first center nozzle and the second center nozzle are arranged at intervals in a dispersed manner.
Further, the outer ring nozzle and the first center nozzle are arranged at the edge or the position close to the edge of the top surface of the nozzle seat at intervals, and the second center nozzle is arranged at the center or the position close to the center of the nozzle seat.
Furthermore, the number of the outer ring injection pipes is two;
the number of the outer ring nozzles is two, the two outer ring nozzles and the two outer ring injection pipes are arranged in a one-to-one correspondence mode, and the two outer ring nozzles are arranged on two sides of the first center nozzle respectively.
Further, the first center nozzle is offset from a line connecting the two outer ring nozzles;
and/or;
the two outer ring injection pipes are respectively arranged at two sides of the first central injection pipe.
Further, the diameter of the outer ring nozzle is larger than the diameter of the second center nozzle;
and/or;
the first center nozzle has a diameter greater than a diameter of the second center nozzle.
Further, the central line of the outer ring nozzle is collinear with the central line of the outer ring injection pipe;
and/or;
the central line of the first central nozzle is collinear with the central line of the first central injection pipe;
and/or;
the central line of the second central nozzle is collinear with the central line of the second central injection pipe.
Furthermore, the top surface of the nozzle seat is provided with an outer ring pipeline, a first central pipeline and a second central pipeline, the outer ring pipeline and the first central pipeline are respectively connected with the first gas supply channel, the outer ring nozzle is connected on the outer ring pipeline, the first central nozzle is connected on the first central pipeline, the second central pipeline is connected with the second gas supply channel, and the second central nozzle is connected on the second central pipeline.
Furthermore, the number of the outer ring nozzles is two, and the two outer ring nozzles are connected with the outer ring pipelines in a one-to-one correspondence manner;
the nozzle seat comprises a seat body, a first lug and a second lug integrally protrude downwards from the bottom surface of the seat body, and the first lug extends along the connecting line direction of the two outer ring nozzles;
the first gas supply channel comprises a gas cavity, a first gas supply channel, a second gas supply channel and a third gas supply channel, the gas cavity is arranged in the first lug, one end of the gas cavity is used for being communicated with an outer ring gas circuit, the first gas supply channel vertically and upwardly extends from the gas cavity corresponding to the two outer ring pipelines respectively, the first gas supply channel is communicated with the corresponding outer ring pipeline, the second gas supply channel is horizontally arranged on the side surface of the gas cavity, one end, away from the gas cavity, of the second gas supply channel is communicated with the third gas supply channel vertically and upwardly, and the third gas supply channel is connected with the first central pipeline;
the second air feed channel comprises a fourth air feed channel and a fifth air feed channel, the fourth air feed channel is arranged in the second lug and communicated with the central air channel, the fourth air feed channel corresponds to the second central pipeline, the second central pipeline is vertically upward, and the fifth air feed channel is connected with the second central pipeline.
Further, the combustor still includes outer ring fire lid and central fire lid, outer ring fire lid lock is in on the outer loop structure, central fire is covered and is buckled on the central structure.
The gas stove provided by the invention comprises the burner provided by the invention.
The burner provided by the invention is characterized in that an outer ring nozzle and a center nozzle are arranged on a first air supply channel, the outer ring nozzle and an air inlet of an outer ring injection pipe are oppositely arranged, the outer ring injection pipe is communicated with an outer ring distribution air passage, the outer ring nozzle can spray gas in the first air supply channel into the outer ring injection pipe and inject air into the outer ring injection pipe, mixed gas formed by the gas and the air entering the outer ring injection pipe can flow to the outer ring distribution air passage along the outer ring injection pipe, and the purpose of burning at an outer ring fire hole is realized; the central nozzle is arranged opposite to the air inlet of the central injection pipe, the central injection pipe is communicated with the central distribution air passage, the central nozzle can spray the fuel gas in the first air supply channel into the central injection pipe and inject the air into the central injection pipe, the mixed gas formed by the fuel gas and the air in the central injection pipe enters the central injection pipe, the mixed gas can flow to the central distribution air passage along the central injection pipe, and the purpose of combustion at the central fire cover is achieved. Therefore, the first air supply channel can respectively supply air to the outer ring distribution air passage and the center distribution air passage of the furnace end, namely the outer ring fire hole on the outer ring fire cover and the center fire hole on the center fire cover, so that the outer ring flame generated at the outer ring fire hole and the inner ring flame generated at the center fire hole can be synchronously regulated and controlled, the outer ring flame and the inner ring flame are synchronously increased and decreased, the flame uniformity is better, and the cooking effect is improved when a gas stove comprising the burner is used for cooking.
The gas stove provided by the invention comprises the burner provided by the invention. The beneficial effects which can be achieved by the burner provided by the invention are the same as the great beneficial effects which can be achieved by the burner provided by the invention, and the detailed description is omitted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a perspective of a burner provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of another perspective of a burner provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic front view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a cross-sectional view A-A of FIG. 4, with the right side of the A-A cross-section passing through one of the outer ring nozzles;
FIG. 6 is a cross-sectional view B-B of FIG. 4, where the cross-sectional view B-B coincides with a line connecting the centers of the two outer ring nozzles;
FIG. 7 is a cross-sectional C-C view of FIG. 4, wherein a line connecting the centers of the first center nozzle and the second center nozzle coincides with the cross-sectional C-C view;
fig. 8 is a schematic view of a viewing angle of a burner according to an embodiment of the present invention;
fig. 9 is a schematic view of another viewing angle of the furnace end according to the embodiment of the present invention;
fig. 10 is a schematic bottom view of a burner according to an embodiment of the present invention;
FIG. 11 is a schematic view of a nozzle carrier provided in accordance with an embodiment of the present invention;
FIG. 12 is a schematic bottom view of a nozzle carrier according to an embodiment of the invention;
fig. 13 is a schematic top view of a nozzle holder according to an embodiment of the present invention.
Icon: 1-a nozzle holder; 101-a first bump; 102-a second bump; 11-a first gas supply channel; 112-outer ring pipeline; 1121-outer ring nozzle; 113-a second gas supply duct; 114 — a first central conduit; 1141-a first central nozzle; 115-gas chamber; 116-a first gas supply duct; 117-third gas supply duct; 12-a second gas supply channel; 122-a second central conduit; 1221-a second center nozzle; 13-outer ring gas circuit; 14-a central gas circuit; 2-furnace end; 21-outer ring structure; 211-outer ring ejector tube; 212 — outer ring distribution airway; 22-a central structure; 221-a first central ejector tube; 222-a second central ejector tube; 223-first central distribution airway; 224-second center distribution airway; 311-outer ring negative pressure zone; 411-a first central negative pressure region; 3-outer ring fire cover; 4-a central fire cover; d-fuel gas.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1 to 13, this embodiment provides a burner, which includes a burner 2 and a nozzle holder 1, the burner 2 is provided with an outer ring structure 21 and a central structure 22, the outer ring structure 21 is enclosed outside the central structure 22, the outer ring structure 21 includes an outer ring distribution air passage 212 and an outer ring injection pipe 211, an air outlet of the outer ring injection pipe 211 is communicated with the outer ring distribution air passage 212, the central structure 22 includes a central distribution air passage and a central injection pipe, and an air outlet of the central injection pipe is communicated with the central distribution air passage. The nozzle holder 1 comprises a holder body, a first air supply channel 11 is arranged in the holder body, the first air supply channel 11 is communicated with an outer ring nozzle 1121 and a center nozzle, the outer ring nozzle 1121 is opposite to an air inlet of the outer ring injection pipe 211, and the center nozzle is opposite to an air inlet of the center injection pipe.
In the burner provided by this embodiment, the outer ring nozzle 1121 and the central nozzle are installed on the first air supply channel 11, the outer ring nozzle 1121 and the air inlet of the outer ring injection pipe 211 are arranged opposite to each other, and the outer ring injection pipe 211 is communicated with the outer ring distribution air passage 212, the outer ring nozzle 1121 can inject the gas D in the first air supply channel 11 into the outer ring injection pipe 211 and inject air into the outer ring injection pipe 211, and a mixed gas formed by the gas D and the air entering the outer ring injection pipe 211 can flow to the outer ring distribution air passage 212 along the outer ring injection pipe 211, so that the purpose of combustion at the outer ring fire hole is achieved; the central nozzle is arranged opposite to the air inlet of the central injection pipe, the central injection pipe is communicated with the central distribution air passage, the central nozzle can spray the fuel gas D in the first air supply channel 11 into the central injection pipe and inject air into the central injection pipe, mixed gas formed by the fuel gas D in the central injection pipe and the air can flow to the central distribution air passage along the central injection pipe, and the purpose of combustion at the central fire cover 4 is achieved. Therefore, this embodiment combustor, first air feed channel 11 can be respectively for outer loop distribution air flue 212 and the central distribution air flue air feed of furnace end 2, also can be respectively for outer loop fire hole on outer loop fire lid 3 and the central fire hole air feed on the central fire lid 4, thereby, can regulate and control the outer loop flame that outer loop fire hole department produced and the inner ring flame that central fire hole department produced in step, make outer loop flame and inner ring flame increase and decrease in step, flame uniformity is better, when using the gas-cooker including this combustor to cook, the culinary art effect can improve.
Wherein, this embodiment combustor still includes outer ring fire lid 3 and central fire lid 4, and outer ring fire lid 3 lock is on outer ring structure 21, and the lock is on central structure 22 on central fire lid 4. Outer loop fire lid 3 is provided with a plurality of outer loop fire holes along circumference, and central fire lid 4 is provided with a plurality of inner ring fire holes along circumference.
The outer ring structure 21 of the burner 2 is used for supplying the outer ring fire cover 3 and the central structure 22 of the burner 2, also called inner ring structure, is used for supplying the central fire cover 4. The outer ring distribution air passages 212 of the outer ring structure 21 may be one or more, and the center distribution air passages of the center structure 22 may be one or more. When the outer ring distribution air passages 212 are multiple or the central distribution air passages are multiple, the outer ring distribution air passages and the central distribution air passages can be sequentially sleeved along the radial direction of the furnace end 2, so that more than two rings of flames are formed; the plurality of outer ring distribution air passages 212 or the plurality of central distribution air passages can be respectively connected with the ejector pipes, and one or all of the plurality of ejector pipes of the outer ring distribution air passages 212 or the plurality of ejector pipes of the central distribution air passages can be communicated with the first air supply passage 11.
In the present embodiment, two central distribution air passages, specifically a first central distribution air passage 223 and a second central distribution air passage 224, are provided on the central structure 22 of the burner 2. The central injection pipe includes a first central injection pipe 221 and a second central injection pipe 222, and the central nozzle includes a first central nozzle 1141 and a second central nozzle 1221. The first central distribution air passage 223 is surrounded on the outer side of the second central distribution air passage 224, the air outlet of the first central nozzle 1141 is arranged opposite to the air inlet of the first central injection pipe 221, and the air outlet of the first central injection pipe 221 is communicated with the first central distribution air passage 223; the air outlet of the second central nozzle 1221 is arranged opposite to the air inlet of the second central ejector pipe 222, and the air outlet of the second central ejector pipe 222 is communicated with the second central distribution air passage 224; the first center nozzle 1141 and/or the second center nozzle 1221 communicate with the first air supply passage 11.
It can be understood that the first center distribution air passage 223 and the second center distribution air passage 224 are both communicated with the inner ring fire hole of the center fire cover 4. When the first center nozzle 1141 and the second center nozzle 1221 are communicated with the first air supply passage 11, flames of all fire holes of the center fire cover 4 can be controlled by the first air supply passage 11. When only the first center nozzle 1141 or the second center nozzle 1221 is communicated with the first air supply passage 11, adjusting the first air supply passage 11 can adjust only a portion of the flame of the center fire cover 4.
In one specific implementation, as shown in fig. 6 and 7, the nozzle holder 1 is further provided with a second air supply channel 12. The first center nozzle 1141 communicates with the first air supply passage 11, and the second center nozzle 1221 communicates with the second air supply passage 12.
In the embodiment, primary air supply of the first air supply channel 11 can be realized to meet the requirement that the outer ring nozzle 1121 and the first center nozzle 1141 work simultaneously, the structure is compact, the conveying efficiency of the fuel gas D is improved, and the fuel gas D is combusted more fully; meanwhile, when the user needs to adjust the fire power, the flow of the fuel gas D can be adjusted synchronously with the flow of the fuel gas D of the outer ring nozzle 1121 and the first center nozzle 1141, so that the outer ring flame and the center outer ring flame can be adjusted synchronously, and the uniformity of combustion of the fuel gas D is improved. Further, second central nozzle 1221 can spout the gas mixture of gas D in the second air feed channel 12 and outside air into the second center and draw in the pipe 222, gets into the second center and draws the gas mixture in the pipe 222, can draw in the second center and draw the pipe 222 flow direction second center distribution air flue 224, realizes the purpose of 4 center departments burning at central fire lid, so, nozzle holder 1 can provide more gas D for the fire lid, has promoted the whole heat load of combustor.
In this embodiment, the outer ring nozzle 1121, the first center nozzle 1141 and the second center nozzle 1221 are all disposed on the top surface of the nozzle holder 1 facing the burner 2, and the outer ring nozzle 1121, the first center nozzle 1141 and the second center nozzle 1221 are disposed at intervals in a dispersed manner to ensure sufficient primary air.
In one implementation, the outer ring nozzle 1121 and the first center nozzle 1141 are spaced apart at or near the edge of the top surface of the nozzle holder 1, and the second center nozzle 1221 is disposed at or near the center of the nozzle holder 1. Specifically, the number of the outer ring injection pipes 211 is two, the number of the outer ring nozzles 1121 is two, the two outer ring nozzles 1121 are arranged in one-to-one correspondence with the two outer ring injection pipes 211, and the two outer ring nozzles 1121 are respectively arranged on two sides of the first center nozzle 1141. The first center nozzle 1141 is offset from the line connecting the two outer ring nozzles 1121.
As shown in fig. 11 and 13, the two outer ring nozzles 1121 are respectively disposed at the upper and lower ends of the right side of the nozzle holder 1 near the edge, the first center nozzle 1141 is disposed at the right end of the nozzle holder 1 near the middle of the edge, and the first center nozzle 1141 is located outside the connecting line of the two outer ring nozzles 1121. The two outer ring injection pipes 211 are respectively arranged at two sides of the first central injection pipe 221. The top surface of the nozzle holder 1 is provided with an outer ring pipeline 112, a first central pipeline 114 and a second central pipeline 122, the outer ring pipeline 112 and the first central pipeline 114 are respectively connected with the first gas supply channel 11, the outer ring nozzle 1121 is connected on the outer ring pipeline 112, the first central nozzle 1141 is connected on the first central pipeline 114, the second central pipeline 122 is connected with the second gas supply channel 12, and the second central nozzle 1221 is connected on the second central pipeline 122. As shown in fig. 5 to 7 and 12, the nozzle holder 1 includes a holder body, a first protrusion 101 and a second protrusion 102 integrally protrude downward from a bottom surface of the holder body, and the first protrusion 101 extends along a line direction of two outer ring nozzles 1121. The first air supply passage 11 includes a gas chamber 115, a first air supply passage 116, a second air supply passage 113, and a third air supply passage 117. A gas cavity 115 is arranged in the first lug 101, one end of the gas cavity 115 is used for communicating with the outer ring gas circuit 13, first gas supply channels 116 vertically and upwardly extend from the gas cavity 115 corresponding to the two outer ring pipelines 112 respectively, and the first gas supply channels 116 are communicated with the corresponding outer ring pipelines 112. An outer ring nozzle 1121 is arranged at the air outlet end of each outer ring pipeline 112, and the center line of the outer ring nozzle 1121 and the center line of the outer ring injection pipe 211 are arranged in a collinear manner, so that the injection effect is improved. A second air supply channel 113 is horizontally arranged on the side surface of the gas cavity 115, a third air supply channel 117 which is vertically upward is communicated with one end, far away from the gas cavity 115, of the second air supply channel 113, and the third air supply channel 117 is connected with the first central pipeline 114. The gas outlet end of the first central pipeline 114 is provided with a first central nozzle 1141, and the central line of the first central nozzle 1141 and the central line of the first central injection pipe 221 are preferably arranged in a collinear manner, so as to improve the injection effect. The second air supply channel 12 includes a fourth air supply channel and a fifth air supply channel, the fourth air supply channel is disposed in the second bump 102, the fourth air supply channel is communicated with the center air channel 14, the fourth air supply channel is disposed vertically upward corresponding to the second center air channel 122, and the fifth air supply channel is connected with the second center air channel 122. The air outlet end of the second central pipeline 122 is provided with a second central nozzle 1221, and the central line of the second central nozzle 1221 and the central line of the second central injection pipe 222 can also be arranged in a collinear manner, so that the injection effect is improved.
The gas flow path of the first gas supply channel of the present embodiment is: the fuel gas D flowing in from the air inlet end of the first air supply channel 11, that is, the outer ring air channel 13 flows into the fuel gas chamber 115 of the first air supply channel 11, then enters the first air supply channel 116, enters the outer ring pipeline 112, and is injected into the outer ring injection pipe 211 through the outer ring nozzle 1121; the gas D in the gas chamber 115 flows into the third gas supply passage 117 through the second gas supply passage 113, then flows into the first center pipe 114, and is injected into the first center pipe 114 through the first center nozzle 1141.
It is understood that outer ring pipe 112 and first center pipe 114 are disposed correspondingly to outer ring nozzle 1121 and first center nozzle 1141, respectively, so that outer ring pipe 112 and first center pipe 114 are both disposed outside nozzle carrier 1; the outer ring pipe 112 and the two first central pipes 114 are arranged in a staggered manner.
Outer ring pipeline 112 and first center pipeline 114 all set up the outside at nozzle holder 1 for outer ring nozzle 1121 and first center nozzle 1141 draw primary air from nozzle holder 1 outside space, and the primary air in the nozzle holder 1 outside is sufficient, can avoid the primary air in the nozzle holder 1 outside to compete with the secondary air of nozzle holder 1 intermediate position moreover and take place to compete and rob. The outer ring main fire gas D ejected from the outer ring nozzle 1121 flows at a high speed and injects ambient air into the outer ring injection pipe 211, and an outer ring negative pressure region 311 (the outer ring negative pressure region in fig. 13 indicates a region and has no solid structure) is formed around the outer ring pipeline 112; the outer ring central ignition gas D from the first central nozzle 1141 flows at high velocity and draws ambient air into the first central ejector pipe 221, forming a first central negative pressure region 411 (the first central negative pressure region in fig. 13 shows an area without solid structure) around the first central pipe 114. The outer ring pipeline 112 and the first central pipeline 114 are arranged in a staggered manner, so that the outer ring negative pressure region 311 and the first central negative pressure region 411 are staggered with each other, mutual contention of primary air in the negative pressure regions is avoided, sufficient primary air supply of outer ring main fire and central outer ring fire can be ensured, and good combustion working conditions are ensured.
In a preferred implementation, the diameter of outer ring nozzle 1121 is larger than the diameter of second center nozzle 1221; the diameter of the first center nozzle 1141 is larger than the diameter of the second center nozzle 1221.
It can be understood that the diameters of the outer ring nozzle 1121 and the first center nozzle 1141 are larger, so that the flow rate of the fuel gas D of the outer ring main fire and the center outer ring fire is larger, the capability of injecting primary air is stronger, and the burner is suitable for cooking with big fire or stir-frying by matching with flames at the outer ring fire hole. The diameter of the second central nozzle 1221 is small, so that the flow of the fuel gas D of the central annular fire is small, the capability of injecting primary air is weak, and the interference is easy to occur; the second central pipeline 122 is arranged in the nozzle holder 1, and can avoid the influence of the change of the external environment of the nozzle holder 1 on the primary air of the central annular fire, thereby ensuring the sufficient supply of the primary air of the central annular fire and ensuring the stable combustion of the central annular fire. The combustor of the embodiment can be used for an integrated cooker, stable combustion of central fire can be guaranteed in the state that a smoke machine of the integrated cooker is opened and the outside is windy, and the adaptation scene of the combustor is wider. In addition, the second central pipeline 122 is independently supplied with air through the second air supply channel 12, the diameter of the second central nozzle 1221 is small, small fire with small heat load can be achieved in the center inner ring, the heat preservation device is suitable for a user soup cooking or heat preservation food material cooking scene, and user experience is good.
Further, the combustor of the present embodiment is provided with four nozzles, namely, two outer ring nozzles 1121, a first center nozzle 1141 and a second center nozzle 1221; compare with the nozzle holder that sets up the three nozzles of two outer ring nozzles and an inner ring nozzle among the prior art, this embodiment combustor can provide more gas D for the combustor, and each nozzle gas D can intensive mixing with the air, and the burning is more abundant to the whole heat load of combustor has been promoted. The gas D of the outer ring distribution air passage 212 comes from the two outer ring nozzles 1121, the gas D of the central distribution air passage comes from the first central nozzle 1141 and the second central nozzle 1221, and the gas D flow distribution of the outer ring structure 21 and the central structure 22 is reasonable, so that the whole heat load is uniformly distributed at the outer ring and the center, and the uniformity of the flame of the burner is ensured.
The embodiment also provides a gas stove which comprises the burner provided by the embodiment.
The burner of the gas stove of the embodiment can be an upper air inlet burner or a lower air inlet burner, and the gas stove can be an integrated stove.
The gas stove of the present embodiment has the same beneficial effects as the burner provided by the present embodiment, and the description thereof is omitted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.