CN114060817B

CN114060817B - Ejector, upper air inlet combustor and gas stove

Info

Publication number: CN114060817B
Application number: CN202111396736.1A
Authority: CN
Inventors: 谭争鸣; 陈园园; 张炳卫
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2024-05-14
Anticipated expiration: 2041-11-23
Also published as: CN114060817A

Abstract

The application discloses an ejector, an upper air inlet combustor and a gas stove, which solve the technical problem of complex structure of the gas stove in the prior art. The ejector provided by the application comprises an outer ring gas mixing disc, an inner ring injection pipe and more than two outer ring injection pipes, wherein the air inlet end of the inner ring injection pipe and the air inlet end of each outer ring injection pipe are positioned on the same side of the ejector, so that the air inlet end of the inner ring injection pipe and the air inlet end of each outer ring injection pipe are positioned at one position, the arrangement of a nozzle and a corresponding gas pipeline is facilitated, and the development of subsequent overhaul work is facilitated. Compared with the prior art, the outer ring injection pipe is spirally arranged along the circumferential direction, so that the nozzles are dispersed, the gas pipeline is longer, and a three-way gas valve is needed. According to the application, the air inlet end of the inner ring injection pipe and the air inlet ends of the outer ring injection pipes are arranged on the same side of the injector, the positions of the nozzles are relatively concentrated, the length of the gas pipeline can be reduced, a two-channel gas valve can be adopted, and the accessory structure is simplified.

Description

Ejector, upper air inlet combustor and gas stove

Technical Field

The application belongs to the technical field of kitchen appliances, and particularly relates to an ejector, an upper air inlet combustor and a gas stove.

Background

The household gas stove burner has a lower air inlet mode (primary air is supplemented below the panel) and an upper air inlet mode (primary air is supplemented above the panel) according to the air inlet mode of the primary air. The primary air and the secondary air of the upper air inlet burner are from above the panel, the bottom shell can be fully sealed, and compared with the traditional lower air inlet burner, the upper air inlet burner is safer, and the problems that the nozzle is blocked by foreign matters and the like can be solved.

The upper air inlet burner has the defects that the structure of an injection pipe is difficult to be long due to the limited space on a panel, so that the premixing of fuel gas and air is incomplete, the combustion efficiency is low, and the load is difficult to be large. In order to improve the injection capacity, the current upper air inlet combustor is generally provided with a plurality of injection pipes, a plurality of nozzles are correspondingly required to be arranged, and the gas pipeline and the valve structure of the nozzles are complex.

Disclosure of Invention

The application provides an ejector, an upper air inlet combustor and a gas stove, which aim to solve the technical problem that the existing gas stove is complex in structure.

The application adopts a technical scheme that: there is provided an ejector tube comprising:

an inner ring gas mixing disc provided with a gas mixing cavity;

The inner ring injection pipe is communicated with the air mixing cavity of the inner ring air mixing disc;

An outer ring gas mixing disc provided with a gas mixing cavity;

more than two outer ring injection pipes are communicated with the gas mixing cavity of the outer ring gas mixing disk;

the air inlet end of the inner ring injection pipe and the air inlet ends of the more than two outer ring injection pipes are positioned on the same side of the injector.

According to the technical scheme, the ejector provided by the application is of a multi-ring structure and comprises an outer ring gas mixing disc and an inner ring gas mixing disc, and a plurality of ejector pipes are used for ejecting gas-air mixed gas flows into the gas mixing cavities of the outer ring gas mixing disc and the inner ring gas mixing disc, so that the combustion efficiency is ensured. In the ejector provided by the application, the outer ring gas mixing disc is provided with more than two outer ring ejector pipes, and the air inlet end of the inner ring ejector pipe and the air inlet end of each outer ring ejector pipe are positioned on the same side of the ejector, so that the air inlet end of the inner ring ejector pipe and the air inlet end of each outer ring ejector pipe are positioned at the same position, the arrangement of a nozzle and corresponding gas pipelines is facilitated, and the development of subsequent overhaul work is facilitated.

Compared with the prior art, the outer ring injection pipe is spirally arranged along the circumferential direction, so that the nozzles are scattered, the length of the gas pipeline is longer, and a gas valve with more than three channels is usually needed. According to the application, the air inlet end of the inner ring injection pipe and the air inlet ends of the outer ring injection pipes are arranged on the same side of the injector, the positions of the nozzles are relatively concentrated, the length of the gas pipeline can be reduced, a two-channel gas valve can be adopted, and the accessory structure is simplified.

In some embodiments, the ejector further comprises a partition separating the inlet region of the inner ring ejector tube from the inlet region of the outer ring ejector tube.

The air inlet areas of the inner ring injection pipe and the outer ring injection pipe are separated by the partition plates, so that a primary air inlet channel of the inner ring injection pipe is separated from a primary air inlet channel of the outer ring injection pipe, the inner ring injection pipe and the outer ring injection pipe are prevented from interfering with each other in the primary air injection process, primary air coefficient is reduced, and the injection performance of the combustor is improved.

In some embodiments, the ejector further comprises a docking portion provided with a receiving cavity for receiving the air inlet end; the partition board is connected to the butt joint part.

Through setting up the butt joint portion, can locate the holding chamber of butt joint portion with the air inlet end of interior, outer loop injection pipe to this primary air area and the secondary air area of intaking of separating the ejector avoid one, secondary air to rob the gas, and then improve the injection performance of combustor.

In some embodiments, two outer ring injection pipes are provided, each outer ring injection pipe comprises a straight pipe section and a bent pipe section which are connected, and the bent pipe sections of the two outer ring injection pipes are arranged at intervals along the circumferential reverse rotation direction;

the inner ring injection pipe is arranged between the straight pipe sections of the two outer ring injection pipes in parallel;

The two separation plates are respectively positioned between the two straight pipe sections and the inner ring injection pipe.

Through setting up outer loop injection pipe to including straight tube section and bend section, the bend section is connected in outer loop gas mixing dish, utilizes its curved structure, and the bend section can be along the circumference extension of outer loop gas mixing dish, increases the extension length of bend section, and the rotation of bend section is opposite to make the straight tube section that connects can extend to the same side of injector. The inner ring injection pipe is arranged between the two straight pipe sections in parallel, so that the injection pipe is convenient to be arranged in a structural mode.

In some embodiments, at least one of the outer ring ejector tubes comprises two or more spaced apart tubes.

Through setting up the outer loop ejector tube to the pipe fitting that includes a plurality of intervals setting, the axial interval between the pipe fitting is used for once air intake equally to improve primary air coefficient, and then improve the ejector capacity of this ejector tube, increase the heat load of combustor.

In some embodiments, the outer ring ejector tube comprises:

the first injection pipe fitting is provided with an air inlet end and an air outlet end which are used for butt joint of the nozzles;

the second injection pipe fitting is provided with an air inlet end and an air outlet end used for being connected with the outer ring air mixing disc;

The first injection pipe fitting and the second injection pipe fitting are sequentially arranged along the air inlet direction, and the air outlet end of the first injection pipe fitting and the air inlet end of the second injection pipe fitting are axially spaced.

Through setting up the outer loop ejector tube into two segmentation structures to this improves primary air coefficient, and the quantity of ejector tube does not increase, consequently can not increase the volume of ejector.

In some embodiments, the first ejector tube and/or the second ejector tube has a throat section with a cross-sectional area that is smaller than the inlet end of the tube in which it is located.

By arranging the throat section in the injection pipe, the cross-sectional area of the throat section is smaller than that of the air inlet end of the pipe fitting, so that the pipe fitting with the throat section can utilize the Venturi effect, and the primary air coefficient is improved.

In some embodiments, the first ejector tube and the second ejector tube each have the throat section, and the cross-sectional area of the throat section of the first ejector tube is less than the cross-sectional area of the throat section of the second ejector tube.

Through setting up the choke section cross-sectional area that first draws in the pipe fitting and be not greater than the choke section that the second draws in the pipe fitting for the air current velocity of flow is bigger when circulating in the choke section that the first draws in the pipe fitting, can obtain bigger gas velocity of flow at the air inlet end that the second draws in the pipe fitting, draws in primary air more easily, improves the entering condition of two pipe fitting axial interval department primary air.

In some embodiments, the throat section of the first ejector tube is 6-14 mm in diameter; the diameter of the throat section of the second injection pipe fitting is 10-16 mm.

In some embodiments, the first injection pipe fitting is an air inlet section and the throat section for docking a nozzle in sequence along an air inlet direction;

The second injection pipe fitting is sequentially provided with an air inlet section for butting the first injection pipe fitting, a throat section and a transition section for connecting the air mixing disc along the air inlet direction.

Through setting up first pipe fitting that draws in includes air inlet section and throat section, the second draws in pipe fitting and includes air inlet section, throat section and changeover portion for the first throat section that draws in pipe fitting butt joint second draws in the air inlet section of pipe fitting, the gas velocity of flow is big in the throat section on the one hand, can obtain bigger gas velocity of flow at the air inlet section of second drawing in pipe fitting, and on the other hand the second draws in the air inlet section cross-section area of pipe fitting great, more is favorable to the primary air entering, further improves the entering condition of two pipe fitting axial interval departments primary air.

In some embodiments, the length of the first ejector tube is less than the length of the second ejector tube.

Through setting up the length of first pipe fitting that draws in is littleer for the axial interval between two pipe fittings is closer to the nozzle, and the second draws in the pipe fitting and can draw in the gas that does not get into first pipe fitting that draws in, reduces the gas and leaks the risk.

In some embodiments, the axial spacing is 6 to 12mm.

Through setting up the axial interval between first pipe fitting and the second pipe fitting that draws and draw to draw for 6 ~ 12mm, in this axial interval within range, the second draws and draw the pipe fitting and can obtain bigger primary air coefficient.

The application adopts another technical scheme that: there is provided an upper air intake burner comprising:

The ejector;

The air distribution disc is arranged on the ejector and is provided with an inner ring air distribution cavity communicated with the air mixing cavity of the inner ring air mixing disc and an outer ring air distribution cavity communicated with the air mixing cavity of the outer ring air mixing disc;

The nozzle seat is provided with more than two nozzles for butting the inner ring injection pipe and the outer ring injection pipe;

The inner ring fire cover is covered on the inner ring uniform air cavity;

And the outer ring fire cover is covered on the outer ring uniform air cavity.

According to the technical scheme, the upper air inlet combustor is provided with the air distribution disc, the inner ring air distribution cavity and the outer ring air distribution cavity of the air distribution disc are respectively communicated with the inner ring air mixing cavity and the outer ring air mixing cavity of the ejector, so that the gas-air mixed gas provided by the ejector is fully mixed with secondary air, the oxygen supply is improved, the gas-air mixed gas is uniformly distributed on the air distribution disc, the gas uniformity is improved, and higher combustion efficiency is obtained.

In some embodiments, the nozzle mount is located on the air intake side of the eductor.

The nozzle seat is arranged on the air inlet side of the ejector, so that the assembly height of the upper air inlet burner in the height direction is reduced, and the size of the burner is reduced.

In some embodiments, the nozzle holder includes a mounting seat for mounting the nozzle, the mounting seat and the injector enclosing a closed space, each of the nozzle and each of the air inlet ends being located in the closed space.

Through setting up the mount pad, be used for the installation fixed nozzle on the one hand, on the other hand is used for with the ejector butt joint. Through all encircleing the air inlet end of each nozzle, inner ring injection pipe and the air inlet end of each outer ring injection pipe in sealed interval, can reduce the risk that the foreign matter got into to prevent that a secondary air from robbing the gas.

In some embodiments, the gas distribution plate comprises an inner ring plate part provided with the inner ring gas distribution chamber and an outer ring plate part provided with the outer ring gas distribution chamber, and an inter-ring gap is arranged between the inner ring plate part and the outer ring plate part;

the outer ring disc part is provided with more than 2 outer ring air ports and secondary air inlet cavities which are alternately distributed along the circumferential direction, the outer ring air homogenizing cavity is communicated with the air mixing cavity of the outer ring air mixing disc through the outer ring air ports, and the inter-ring gaps are communicated with the secondary air inlet cavities.

The gas distribution disc is provided with a gap between rings, an outer ring gas port and a secondary air inlet cavity, wherein the outer ring gas port is used for allowing gas and primary air of an outer ring to enter, and the secondary air inlet cavity is used for allowing secondary air to enter. The inter-annular gap is communicated with the secondary air inlet cavity, so that the secondary air inlet condition of the inner and outer rings is improved, and the combustion efficiency is improved.

In some embodiments, the gas distribution tray further comprises an outer annular skirt, a vertical projection of which covers the ejector.

Through setting up outer loop shirt rim for the gas distributor has bigger coverage area, can cover the ejector completely, consequently can stop the foreign matter and get into the junction of nozzle and injection pipe, avoid the nozzle to block up.

In some embodiments, the inner ring fire cover is annular.

Through setting up the inner ring fire lid into annular for the bottom of a boiler greasy dirt can directly follow the center cavity inflow gas dish of inner ring fire lid and inner ring gas mixing dish, and the gas dish is detachable, conveniently washs.

The application adopts another technical scheme that: a gas stove is provided, comprising the upper air inlet burner.

The upper air inlet burner with the ejector is arranged in the gas stove, and because primary air and secondary air enter from the ejector and the air distribution disc respectively, the ejector is positioned above the panel of the gas stove, the gas stove adopts an upper air inlet mode, and based on the structural design of the ejector and the upper air inlet burner, the gas stove has the advantages of being convenient for arranging a gas pipeline and good in combustion effect, and compared with the existing upper air inlet burner, the power of the upper air inlet burner is less than 4.5kW, and the thermal load of the upper air inlet burner can reach 5.2KW.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a front view of an ejector in an embodiment of the application.

Fig. 2 shows a bottom view of the injector of fig. 1.

Fig. 3 shows a top view of the ejector of fig. 1.

Fig. 4 shows a section A-A of the ejector of fig. 3.

FIG. 5 shows a schematic diagram of the structure of the upper intake burner in an embodiment of the application.

FIG. 6 shows a full cross-sectional view of the upper intake air combustor of FIG. 5.

Fig. 7 shows an exploded view of the upper intake air burner of fig. 5.

Fig. 8 shows a block diagram of the assembly of the ejector and the nozzle holder in the upper air intake burner of fig. 5.

Fig. 9 shows a schematic structural view of the air separation tray in the upper air intake burner of fig. 5.

Fig. 10 shows a top view of the gas distribution plate of fig. 9.

Fig. 11 shows a section B-B of the gas distribution plate of fig. 10.

Fig. 12 is a schematic view showing the structure of a gas range in an embodiment of the present application.

Reference numerals illustrate: 100-ejector; 110-an outer ring injection pipe, 110 a-a straight pipe section, 110 b-a bent pipe section; 111-a first injection pipe fitting, 1111-an air inlet section and 1112-a throat section; 112-a second injection pipe fitting, 1122-a throat section and 1123-a transition section; 113-axial spacing; a-an air inlet end and b-an air outlet end; 120-inner ring injection pipe; 130-an outer ring gas mixing disc, 131-a gas mixing cavity of the outer ring gas mixing disc; 140-an inner ring gas mixing disc, 141-a gas mixing cavity of the inner ring gas mixing disc; 150-a separator; 160-abutting portion, 161-accommodating cavity.

1100-Upper air inlet burner; 100-ejector; 200-nozzle seat, 210-nozzle, 220-mounting seat, 230-enclosed section; 300-gas distribution plates, 310-outer ring plate parts, 311-outer ring uniform gas cavities, 320-inner ring plate parts, 321-inner ring uniform gas cavities, 330-inter-ring gaps, 340-outer ring gas ports, 350-secondary gas inlet cavities and 360-outer ring skirt edges; 400-outer ring fire cover; 500-inner ring fire cover.

1000-Gas stove; 1100-upper air inlet burner; 1200-cooker support; 1300-panel.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

In the related art, in the upper air inlet burner horizontally arranged on the gas stove, the injection pipes are arranged on the base, the inner ring is usually a single injection pipe, the number of the outer ring injection pipes is generally 2-4, and 2-4 outer ring injection pipes are uniformly distributed along the circumference in the same rotation direction. Taking an ejector with single inner ring ejection and double outer ring ejection as an example, two outer ring ejection pipes are distributed on the lower surface of the outer ring ejection disk in the same rotation direction, and 3 nozzles are also distributed at intervals along the circumference, so that the gas pipeline is long and is easy to wind. And because the two outer ring injection pipes are symmetrically distributed on the lower surface of the outer ring injection disk in the same rotation direction, the injector is required to be provided with a three-way gas valve, and the whole structure of the gas stove is complex.

Therefore, the embodiment of the application provides the ejector, the upper air inlet combustor and the gas stove, which at least can solve the technical problem of complex structure of the gas stove in the prior art to a certain extent.

The application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

Example 1:

An embodiment of the present application provides an ejector 100, as shown in fig. 1 to 4, which is an overall structure diagram and a cross-sectional view of the ejector 100 under various viewing angles. The ejector 100 has a double-ring structure and comprises an inner ring gas mixing disk 140, an outer ring gas mixing disk 130, an inner ring ejector pipe 120 and more than two outer ring ejector pipes 110. The inner ring injection pipe 120 and the outer ring injection pipe 110 are respectively connected with the inner ring gas mixing disk 140 and the outer ring gas mixing disk 130, and the pipe cavity of the inner ring injection pipe 120 is communicated with the gas mixing cavity 141 of the inner ring gas mixing disk 140, and the pipe cavity of each outer ring injection pipe 110 is respectively communicated with the gas mixing cavity 131 of the outer ring gas mixing disk 130 to form injection channels of the inner ring and the outer ring.

In the ejector 100, the air inlet end of the inner ring ejector pipe 120 and the air inlet end of each outer ring ejector pipe 110 are positioned on the same side, that is, the air inlet direction of the inner ring ejector pipe 120 is the same as the air inlet direction of each outer ring ejector pipe 110, so that the air inlet end of the inner ring ejector pipe 120 and the air inlet end of each outer ring ejector pipe 110 are positioned at the same place, the arrangement of the nozzle 210 and the corresponding gas pipeline is convenient, and the development of subsequent overhaul work is convenient. In some embodiments, the ejector 100 may also be configured to have a multi-ring structure, for example, a three-ring structure including an inner ring, an intermediate ring, and an outer ring, where the number of ejector tubes of the intermediate ring is more than one, the number of ejector tubes of the outer ring is more than two, and the air inlet ends of the ejector tubes are all located on the same side.

Because the air inlet end positions of the ejector pipes are concentrated in the ejector 100 of the application, the problem of air robbing needs to be considered, and in some embodiments, the ejector 100 further comprises a partition plate 150, the partition plate 150 separates the air inlet area of the inner ring ejector pipe 120 from the air inlet area of the outer ring ejector pipe 110, so that the primary air inlet channel of the inner ring ejector pipe 120 is separated from the primary air inlet channel of the outer ring ejector pipe 110, and the primary air coefficient is prevented from being reduced due to mutual interference in the process of ejecting primary air by the inner ring ejector pipe 110 and the outer ring ejector pipe 110, thereby improving the ejection performance of the burner.

Specifically, in the ejector 100, the outer ring gas mixing disk 130 is annular, and the inner ring gas mixing disk 140 can have a ring groove structure, and a cavity is formed in the center; the inner annular mixing disk 140 may also be configured as a circular groove. To enhance secondary air, in some embodiments, both the inner and outer annular gas mixing disks 140, 130 are annular, with a central cavity of the inner annular gas mixing disk 140 facilitating inner annular secondary air ingress. In some embodiments, the outer ring diameter of the inner ring gas mixing disk 140 is smaller than the inner ring diameter of the outer ring gas mixing disk 130, so that an inter-ring gap 330 is formed between the inner ring gas mixing disk 140 and the outer ring gas mixing disk 130, and the inter-ring gap 330 and the central cavity of the inner ring gas mixing disk 140 are respectively communicated with the outside.

To prevent the inner and outer rings from snatching, in some embodiments, the injector 100 further includes a docking portion 160, the docking portion 160 facilitating assembly or connection of the injector 100 to other accessories of the gas cooker 1000. The butt joint 160 has a holding cavity 161, and the holding cavity 161 is used for holding the air inlet end of the inner ring injection pipe 120 and the air inlet end of each outer ring injection pipe 110, and through setting the butt joint 160, the air inlet ends of the inner ring injection pipe 110 and the outer ring injection pipe 110 can be separated from the secondary air inlet area, so as to separate the primary air inlet area and the secondary air inlet area of the injector 100, avoid first secondary air and second secondary air from rushing to air, and further improve the injection performance of the combustor. Since the partition 150 serves to separate the air inlet ends of the respective ejector pipes, the corresponding partition 150 is also located in the accommodation chamber 161. The spacer 150 is specifically connected to the abutting portion 160, and for example, the spacer 150 and the connecting portion may be provided as a single structure.

Considering that the installation space of the ejector 100 is limited, two outer ring ejector pipes 110 are generally arranged, and the two outer ring ejector pipes 110 have the same structure and are symmetrically distributed below the outer ring gas mixing disk 130. In some embodiments, the two outer ring ejector pipes 110 each comprise a straight pipe section 110a and a curved pipe section 110b, the straight pipe section 110a and the curved pipe section 110b are disposed along the air inlet direction, and are integrally connected, the straight pipe section 110a is used for abutting the nozzle 210, and the curved pipe section 110b is connected to the outer ring air mixing disk 130. Considering that the outer ring gas mixing disk 130 is annular, the bent pipe sections 110b of the two outer ring injection pipes 110 can extend along the circumferential direction of the outer ring gas mixing disk 130 by using the bending structure thereof, and the extension length of the bent pipe sections 110b is increased. The rotation directions of the two bent pipe sections 110b are opposite, that is, the two bent pipe sections 110b are distributed in an eight shape, so that the connected straight pipe sections 110a can extend to the same side of the ejector 100, and the ejector 100 only needs to be provided with two channels of gas valves.

The inner ring injection pipe 120 is an integral straight pipe, the inner ring injection pipe 120 is located between the two outer ring injection pipes 110, and the inner ring injection pipe 120 is parallel to the straight pipe sections 110a of the two outer ring injection pipes 110, so that structural arrangement of the injection pipes and the nozzles 210 is facilitated. In some embodiments, since the number of the outer ring injection pipes 110 of the injector 100 is two, two partition plates 150 are correspondingly required to be arranged, and the two partition plates 150 separate the two straight pipe sections 110a and the inner ring injection pipe 120 respectively, so that the inner ring and the outer ring are prevented from robbing.

In order to improve the injection capacity of the outer ring injection pipes 110, at least one outer ring injection pipe 110 adopts a multi-section injection structure, specifically, in some embodiments, the outer ring injection pipes 110 are of a multi-section structure, and comprise more than two pipe fittings arranged at intervals, the two pipe fittings can be axially distributed at intervals or radially distributed at intervals, so that a gap for primary air to enter is formed between the two pipe fittings, and primary air can enter from the air inlet end of the outer ring injection pipe 110 and also enter from the gap, so that the primary air coefficient is improved, the injection capacity of the outer ring injection pipe 110 is improved, and the heat load of a combustor is increased. In specific implementation, only one of the outer ring injection pipes 110 may be designed as the multi-section injection structure, and all the outer ring injection pipes 110 may be designed as the multi-section injection structure.

In some embodiments, the outer ring injection pipe 110 adopts an axial double-section structure, specifically includes a first injection pipe 111 and a second injection pipe 112, where the first injection pipe 111 and the second injection pipe 112 are two independent pipes, and each has an air inlet end a and an air outlet end b. Specifically, the first injection pipe fitting 111 and the second injection pipe fitting 112 are sequentially arranged along the air inlet direction, the air inlet end a of the first injection pipe fitting 111 is used for being in butt joint with the nozzle 210, and the air outlet end b of the second injection pipe fitting 112 is used for being connected with the outer ring air mixing disc 130, so that the first injection pipe fitting 111 and the second injection pipe fitting 112 form a complete injection channel.

The air outlet end b of the first injection pipe fitting 111 and the air inlet end a of the second injection pipe fitting 112 are axially provided with a space axial interval 113, and primary air can enter the outer ring injection pipe 110 from the air inlet end a of the first injection pipe fitting 111 and enter the outer ring injection pipe 110 from the axial interval 113 by arranging the axial interval 113, so that primary air coefficient is improved, injection capacity of the outer ring injection pipe 110 is improved, and heat load of a combustor is increased.

In certain embodiments, the length of the first ejector 111 is less than the length of the second ejector 112. By providing the first ejector tube 111 with a smaller length such that the axial space 113 between the two tubes is closer to the nozzle 210, the second ejector tube 112 is able to draw in gas that does not enter the first ejector tube 111, reducing the risk of gas leakage.

In order to improve the ejection capacity of the outer ring ejector tube 110, the outer ring ejector tube 110 may be designed as a tube structure with a venturi effect, and the primary air coefficient is improved by using the venturi effect. In some embodiments, the first ejector tube 111 and the second ejector tube 112 may each be configured as a conduit having a "venturi effect", and in other embodiments, only the first ejector tube 111 or the second ejector tube 112 may be configured as a conduit having a "venturi effect". A venturi is a typical conduit structure with a "venturi effect". In some embodiments, part of the section of the outlet end b of the venturi tube may also be eliminated, namely: the air inlet end a of the pipe fitting is a conical pipe section, and the rest part is a straight pipe section 110a with the same pipe diameter as the small-diameter end of the conical pipe section. The specific structures of the first injection pipe fitting 111 and the second injection pipe fitting 112 are not limited in the application, and the requirement that the throat pipe sections exist is met, namely: the cross-sectional area of a part of the pipe sections of the pipe fitting is smaller than that of the air inlet end a, so that the pipe section with smaller cross-sectional area forms a throat section, the flow speed of air flow in the throat section is increased, and the primary air coefficient is improved by utilizing the Venturi effect.

In some embodiments, the first ejector 111 includes an air inlet section 1111 and a throat section 1112, the air inlet section 1111 being a tapered pipe section, the cross-sectional area of the air inlet section 1111 decreasing in sequence along the air inlet direction, the air inlet end a of the air inlet section 1111 being adapted to interface with the nozzle 210. The first injection pipe 111 may be connected to the outer ring gas mixing disc 130, or the first injection pipe 111 and the outer ring gas mixing disc 130 may be set to an integral structure, which is not limited in the present application.

The second injection pipe fitting 112 sequentially comprises an air inlet section, a throat section 1122 and a transition section 1123 along the air inlet direction, the second injection pipe fitting 112 is of a venturi structure, and the cross section area of the throat section 1122 is smaller than that of the air inlet section and the transition section 1123. The air inlet section of the second injection pipe fitting 112 is used for butt joint with the first injection pipe fitting 111, specifically butt joint with the throat section 1112 of the first injection pipe fitting 111, and the transition section 1123 is used for connecting with the outer ring gas mixing disk 130. Through setting up the throat section 1112 of first drawing pipe fitting 111 and butt joint second drawing pipe fitting 112 the inlet section, on the one hand, the gas velocity of flow is big in the throat section 1112, can obtain bigger gas velocity of flow at the inlet section of second drawing pipe fitting 112, and on the other hand, the inlet section cross-sectional area of second drawing pipe fitting 112 is great, more is favorable to primary air to get into, improves the entering condition of two pipe fitting axial intervals 113 department primary air. In certain embodiments, the second ejector conduit 112 may also be configured to include only the throat section 1122 and the transition section 1123, i.e., the throat section 1112 of the first ejector conduit 111 interfaces with the throat section 1122 of the second ejector conduit 112.

In the outer ring outer injection pipe 110, the air inlet section 1111 of the first injection pipe 111 to the throat section 1122 of the second injection pipe 112 are straight pipe sections 110a, and the transition section 1123 of the second injection pipe 112 is a curved pipe section 110b. In some embodiments, the cross-sectional area of the throat section of the first ejector tube 111 is smaller than that of the throat section of the second ejector tube 112, and by setting the cross-sectional area difference, the airflow velocity is larger when flowing in the throat section of the first ejector tube 111, and a larger airflow velocity can be obtained at the air inlet end a of the second ejector tube 112, so that primary air is more easily sucked, and the entering condition of the primary air at the axial interval 113 of the two tubes is improved.

In certain embodiments, the throat section of the first ejector tube is 6-14 mm in diameter, e.g., 6.5mm, 7mm, 8.2mm, 9.5mm, 10mm, 10.5mm, 11mm, 12.5mm, 13.5mm, etc.; the diameter of the throat section of the second ejector tube is 10-16 mm, such as 10.1mm, 10.5mm, 11mm, 12.5mm, 13.5mm, 14mm, 14.5mm, 15.8mm, etc.

In certain embodiments, the axial spacing 113 of the first ejector 111 and the second ejector 112 is 6 to 12mm, e.g., 6.5mm, 7mm, 8.2mm, 9.5mm, 10mm, 10.5mm, 11mm, etc. By setting the axial interval 113 between the first injection pipe fitting 111 and the second injection pipe fitting 112 to be 6-12 mm, the second injection pipe fitting 112 can obtain a larger primary air coefficient within the range of the axial interval 113.

Example 2:

Based on the same inventive concept, the embodiment of the present application provides an upper air intake burner 1100, wherein the upper air intake burner 1100 is an essential component of the gas stove 1000, and the ejector 100 and the nozzle 210 of the upper air intake burner 1100 are both located above the panel 1300 of the gas stove 1000, and primary air and secondary air are both introduced from the panel 1300, so that the upper air intake burner is "upper air intake".

Referring to fig. 5 to 7, the upper air intake burner 1100 includes an ejector 100, an air distribution plate 300, a nozzle holder 200, an inner ring fire cover 500 and an outer ring fire cover 400, wherein the ejector 100 is specifically adopted by the ejector 100 of the above embodiment 1, and the specific structure is not repeated here. The gas distribution disc 300 is arranged on the ejector 100 and is used for homogenizing and remixing the gas and air ejected by the ejector 100, the inner ring air homogenizing cavity 321 and the outer ring air homogenizing cavity 311 of the gas distribution disc 300 are respectively communicated with the air mixing cavity 141 of the inner ring air mixing disc 140 and the air mixing cavity 131 of the outer ring air mixing disc 130 of the ejector 100, so that the gas and air mixed gas provided by the ejector 100 is fully mixed with secondary air, the oxygen supply is improved, the gas and air mixed gas is uniformly distributed on the gas distribution disc 300, the gas uniformity is improved, and higher combustion efficiency is obtained. The nozzle seat 200 is provided with more than two nozzles 210, the nozzles 210 are connected with a gas pipeline and spray gas to each injection pipe, the positions of the nozzles 210 are in one-to-one correspondence with the inner ring injection pipe 120 and each outer ring injection pipe 110, the nozzles 210 are close to the air inlet end of each injection pipe, and in some embodiments, a plurality of nozzles 210 can be configured for one or a plurality of injection pipes. The inner ring fire cover 500 and the outer ring fire cover 400 are respectively covered and buckled on the inner ring uniform air cavity 321 and the outer ring uniform air cavity 311 of the gas distribution disc 300, and a plurality of fire holes are arranged on the fire covers for gas combustion.

In the upper air intake burner 1100, the ejector 100, the air separation tray 300, the inner ring fire cover 500 and the outer ring fire cover 400 are assembled in the height direction, and the nozzle holder 200 may be assembled under the ejector 100 in the height direction. In certain embodiments, the nozzle holder 200 is assembled with the eductor 100 in the intake direction. Referring specifically to fig. 8, the nozzle holder 200 is located on the air intake side of the ejector 100, and the nozzle holder 200 is disposed side by side with the ejector 100 in the horizontal direction. By disposing the nozzle holder 200 on the intake side of the ejector 100, the height of the upper intake air burner 1100 in the height direction is reduced, and the burner volume is reduced.

The nozzle holder 200 specifically includes a mounting seat 220, and each nozzle 210 is disposed on the mounting seat 220 at intervals, so as to facilitate the installation and fixation of each nozzle 210. The mounting block 220 is used to mount the stationary nozzle 210 on the one hand and to interface with the eductor 100 on the other hand. Referring specifically to fig. 8, in some embodiments, the mounting base 220 is a frame-shaped plate, and the frame-shaped plate also has a receiving cavity 161, and two ends of the frame-shaped plate are assembled with the docking portion 160 of the ejector 100, so that the frame-shaped plate and the receiving cavity 161 of the docking portion 160 are integrated into a closed section in a horizontal direction, and the air inlet ends of the nozzles 210, the inner ring ejector pipes 120 and the outer ring ejector pipes 110 are all enclosed, for example, the air inlet ends of the nozzles 210, the inner ring ejector pipes 120 and the first ejector pipe members of the outer ring ejector pipes 110 are located in the closed section 230, which can reduce the risk of foreign matters entering and prevent a secondary air from robbing. Each partition 150 divides the enclosed space 230 into individual cells to prevent inner and outer ring gas rushing.

Considering that the ejector 100 has a double-ring structure, the gas distribution plate 300 has a double-ring structure, referring to fig. 9 to 11, and in some embodiments, the gas distribution plate 300 includes an inner ring plate portion 320 and an outer ring plate portion 310, an inner ring gas distribution chamber 321 is disposed in the inner ring plate portion 320, an outer ring gas distribution chamber 311 is disposed in the outer ring plate portion 310, and an inter-ring gap 330 is formed between the inner ring plate portion 320 and the outer ring plate portion 310. The outer ring disk part 310 is provided with more than 2 outer ring air ports 340 and more than 2 secondary air inlet chambers 350 which are alternately distributed along the circumferential direction, the outer ring air ports 340 are used as channels of outer ring air, and the outer ring air homogenizing chambers 311 are communicated with the air mixing chambers 131 of the outer ring air mixing disk 130 through the outer ring air ports 340; the secondary air inlet cavity 350 is used for allowing secondary air to enter, and the inter-annular gap 330 is communicated with the secondary air inlet cavity 350, so that the secondary air entering condition of the inner and outer rings is improved, and the combustion efficiency is improved. The outer ring air ports 340 and the secondary air intake chamber 350 are alternately arranged in the circumferential direction so that the fuel gas, the primary air and the secondary air can be uniformly introduced and sufficiently mixed.

In some embodiments, the gas distribution plate 300 further includes an outer ring skirt 360, and the gas distribution plate 300 is in an integral structure, and the inner ring plate 320 and the outer ring plate 310 are connected with the outer ring skirt 360, so that the outer ring skirt 360 has a larger outer diameter, and the gas distribution plate 300 has a larger coverage area, and can completely cover the ejector 100, so that foreign matters can be prevented from entering the joint of the nozzle 210 and the ejector pipe, and the nozzle 210 is prevented from being blocked.

In the upper air intake burner 1100, the specific number of fire covers is determined according to the number of rings of the upper air intake burner 1100, in general, the upper air intake burner 1100 with a double-ring structure is provided with an inner fire cover and an outer fire cover, while the upper air intake burner 1100 with a triple-ring structure is provided with an inner ring, a middle ring and an outer ring. The middle and outer ring fire covers 400 on the outer side are generally ring-shaped, and the inner ring fire cover 500 on the inner side may be provided in a ring shape or a circular shape. In some embodiments, the inner ring fire cover 500 is arranged in a ring shape, so that oil stains on the bottom of the pot can directly flow into the gas distribution plate 300 from the central cavities of the inner ring fire cover 500 and the inner ring gas mixing plate 140, and the gas distribution plate 300 is detachable and convenient to clean.

Example 3:

Based on the same inventive concept, the embodiment of the present application provides a gas cooker 1000, and the gas cooker 1000 of the embodiment mainly includes a faceplate 1300, a burner, a cooker holder 1200 for holding a cooker, and other necessary accessories such as a thermocouple, an ignition needle, and the like, like the existing gas cooker 1000. In this embodiment, the gas stove 1000 is specifically an upper air intake gas stove 1000, that is, the ejector 100100 is located above the panel 1300, and both primary air and secondary air enter from above the panel 1300.

Referring to fig. 12, unlike the prior art, the gas stove 1000 of the present embodiment has a burner that adopts the upper air intake burner 1100 of the above embodiment 2, and a thermocouple, an ignition needle, etc. are mounted on the air distribution plate 300, and the specific structure of the upper air intake burner 1100 is referred to embodiment 2 and will not be repeated here. Since the panel 1300, the bracket, the ignition pin, and other accessories of the gas stove 1000 are not improved in this embodiment, the specific structure of the gas stove 1000 can be referred to in the prior art, and other undescribed structures of the gas stove 1000 can be referred to in the related art, and the specific contents will not be described here.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An ejector for use with an upper air intake burner, comprising:

an inner ring gas mixing disc provided with a gas mixing cavity;

An outer ring gas mixing disc provided with a gas mixing cavity;

The partition plate separates an air inlet area of the inner ring injection pipe and an air inlet area of the outer ring injection pipe;

The air inlet end of the inner ring injection pipe and the air inlet ends of the more than two outer ring injection pipes are positioned on the same side of the injector; at least one outer ring injection pipe comprises more than two pipe fittings which are axially arranged at intervals.

2. The eductor of claim 1 wherein: the ejector further comprises a butt joint part, wherein the butt joint part is provided with a containing cavity for containing the air inlet end; the partition board is connected to the butt joint part.

3. The eductor of claim 1 wherein: the two outer ring injection pipes comprise straight pipe sections and bent pipe sections which are connected, and the bent pipe sections of the two outer ring injection pipes are arranged at intervals along the circumferential anti-rotation direction;

4. An injector as claimed in any one of claims 1 to 3 wherein: the outer ring injection pipe includes:

5. The ejector according to claim 4, wherein: the first injection pipe fitting and/or the second injection pipe fitting is/are provided with a throat section with a cross-sectional area smaller than that of the air inlet end of the pipe fitting.

6. The ejector according to claim 5, wherein: the first injection pipe fitting and the second injection pipe fitting are both provided with the throat section, and the cross section area of the throat section of the first injection pipe fitting is smaller than that of the throat section of the second injection pipe fitting.

7. The ejector according to claim 6, wherein: the diameter of the throat section of the first injection pipe fitting is 6-14 mm; the diameter of the throat section of the second injection pipe fitting is 10-16 mm.

8. The ejector according to claim 6, wherein: the first injection pipe fitting is sequentially provided with an air inlet section and a throat section along the air inlet direction, wherein the air inlet section and the throat section are used for butt joint of the nozzle;

9. The ejector according to claim 4, wherein: the length of the first injection pipe fitting is smaller than that of the second injection pipe fitting.

10. The ejector according to claim 4, wherein: the axial interval is 6-12 mm.

11. An upper air intake burner, comprising:

an ejector according to any one of claims 1 to 10;

The inner ring fire cover is covered on the inner ring uniform air cavity;

And the outer ring fire cover is covered on the outer ring uniform air cavity.

12. The upper air intake burner of claim 11, wherein: the nozzle seat is positioned on the air inlet side of the ejector.

13. The upper air intake burner of claim 12, wherein: the nozzle seat comprises a mounting seat for mounting the nozzles, the mounting seat and the ejector are surrounded to form a closed interval, and each nozzle and each air inlet end are located in the closed interval.

14. The upper air intake burner of any one of claims 11-13, wherein: the air distribution plate comprises an inner ring plate part provided with the inner ring air distribution cavity and an outer ring plate part provided with the outer ring air distribution cavity, and an inter-ring gap is formed between the inner ring plate part and the outer ring plate part;

15. The upper air intake burner of claim 14, wherein: the gas distribution plate further comprises an outer ring skirt edge, and the vertical projection of the outer ring skirt edge covers the ejector.

16. The upper air intake burner of any one of claims 11-13, wherein: the inner ring fire cover is annular.

17. A gas cooker, characterized in that: comprising an upper inlet air burner according to any one of claims 11 to 16.