CN114060817A

CN114060817A - Ejector, upper air inlet burner and gas stove

Info

Publication number: CN114060817A
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: 2022-02-18
Anticipated expiration: 2041-11-23
Also published as: CN114060817B

Abstract

The application discloses ejector, last air inlet burner and gas-cooker solves the technical problem that the gas-cooker structure that prior art exists is complicated. The utility model provides an ejector includes that outer loop mixes gas dish, inner ring and draws and penetrate the pipe and draw with the outer loop more than two and penetrate the pipe, the inlet end that the pipe was penetrated to the inner ring draws the inlet end that penetrates the pipe and each outer ring draws the inlet end that penetrates the pipe and lie in same one side of ejector for the inlet end that the pipe was penetrated to the inner ring draws the inlet end that penetrates the pipe and each outer ring and all lie in a department, be convenient for arrange the gas pipeline of nozzle and correspondence, and the development of the follow-up maintenance work of being convenient for. Compare and draw the ejector pipe along circumference spiral setting in prior art, lead to the nozzle dispersion, the gas pipeline is longer, and needs use three passageway gas valves. This application draws the inlet end of penetrating the pipe through the inner ring and each outer ring draws the inlet end of penetrating the pipe to set up in the same one side of ejector, and the nozzle position is concentrated relatively, can reduce gas pipeline length to can adopt two-channel gas valve, the annex structure can be simplified.

Description

Ejector, upper air inlet burner and gas stove

Technical Field

The application belongs to the technical field of kitchen utensils, concretely relates to ejector, last air inlet burner and gas-cooker.

Background

The household gas stove burner has a lower air inlet type (primary air is supplemented below a panel) and an upper air inlet type (primary air is supplemented above the panel) according to the air inlet mode of primary air. The primary air and the secondary air of the upper air inlet burner are all from 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 problem that the nozzle is blocked by foreign matters can be solved.

Because of limited space on a panel of the upper air inlet combustor, the injection pipe structure of the upper air inlet combustor is difficult to lengthen, so that the premixing of gas and air is incomplete, the combustion efficiency is low, and the load is difficult to enlarge. In order to improve the injection capacity, the existing 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 structures of a gas pipeline and a valve of the nozzles are complex.

Disclosure of Invention

In order to solve the technical problem that the structure of the existing gas stove is complex, the application provides an ejector, an upper air inlet burner and the gas stove.

The technical scheme adopted by the application is as follows: provided is an injection pipe, including:

the inner ring air mixing disc is provided with an air mixing cavity;

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

the outer ring air mixing disc is provided with an air mixing cavity;

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

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 the multi-ring structure and comprises the outer ring air mixing disc and the inner ring air mixing disc, and the plurality of ejector pipes are used for guiding the gas-air mixed air flow into the air mixing cavity of the outer ring air mixing disc and the inner ring air mixing disc, so that the combustion efficiency is guaranteed. Because the outer loop draws the injection requirement of penetrating the pipe great, in the ejector that this application provided, the outer loop mixes the gas dish configuration and draws the pipe more than two outer loops, and the inlet end that the pipe was drawn to the inner loop draws the inlet end that penetrates the pipe and each outer loop draws the inlet end that penetrates the pipe and lie in same one side of ejector, make the inlet end that the pipe was drawn to the inner loop and each outer loop draw the inlet end that penetrates the pipe all to lie in a department from this, be convenient for arrange the gas pipeline of nozzle and correspondence, and be convenient for follow-up maintenance work develop.

Compare and draw the ejector pipe along circumference spiral setting among the prior art, lead to the nozzle to distribute scattered, gas pipeline length is longer to need to use the gas valve more than the three passageway usually. This application draws the inlet end of penetrating the pipe through the inner ring and each outer ring draws the inlet end of penetrating the pipe to set up in the same one side of ejector, and the nozzle position is concentrated relatively, can reduce gas pipeline length to can adopt two-channel gas valve, the annex structure can be simplified.

In some embodiments, the eductor further includes a baffle separating the air intake region of the inner annular eductor tube and the air intake region of the outer annular eductor tube.

The partition plate is arranged to separate the air inlet areas of the inner ring injection pipe and the outer ring injection pipe, so that the primary air inlet channel of the inner ring injection pipe is separated from the 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 and causing the reduction of primary air coefficient, and the injection performance of the combustor is improved.

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

Through setting up butt joint portion, can locate the inlet end of inside and outside loop ejector tube in the chamber that holds of butt joint portion to this primary air intake region and the secondary air intake region of separating the ejector avoid one, secondary air to rush gas, and then improve the ejection performance of combustor.

In some embodiments, two outer ring injection pipes are provided, each of the two outer ring injection pipes 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 direction in a 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 baffle is provided with two, two the baffle is located two respectively the straight tube section with the inner ring draws and penetrates the pipe.

The outer ring injection pipe is arranged to comprise the straight pipe section and the bent pipe section, the bent pipe section is connected to the outer ring air mixing disc, the bent pipe section can extend along the circumferential direction of the outer ring air mixing disc by utilizing the bending structure of the bent pipe section, the extending length of the bent pipe section is increased, and the turning directions of the bent pipe section are opposite, so that the connected straight pipe section can extend to the same side of the injector. The inner ring injection pipe is arranged between the two straight pipe sections in parallel, so that the injection pipe structure is convenient to arrange.

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

Through drawing the outer loop to penetrate the pipe fitting that the pipe set up to including a plurality of intervals set up, axial interval between the pipe fitting is used for the primary air equally to admit air to improve the primary air coefficient, and then improve this and draw the ability of penetrating the pipe, increase the heat load of combustor.

In some embodiments, the outer annular ejector tube comprises:

the first injection pipe fitting is provided with an air inlet end and an air outlet end which are used for butting the nozzle;

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.

The outer ring injection pipe is arranged to be of a two-section structure, so that the primary air coefficient is improved, the number of the injection pipes is not increased, and the volume of the injector cannot be increased.

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

Through setting up the throat section in drawing penetrating the pipe, because the cross sectional area of throat section is less than the cross sectional area of place pipe fitting inlet end, consequently the pipe fitting that has the throat section can utilize the venturi effect, improves the air factor once.

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

The cross-sectional area of the throat pipe section of the first injection pipe is not larger than that of the second injection pipe, so that the flow rate of air flow is larger when the air flow circulates in the throat pipe section of the first injection pipe, the air inlet end of the second injection pipe can obtain larger air flow rate, primary air is more easily sucked, and the entering condition of the primary air at the axial interval of the two pipes is improved.

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

In some embodiments, the first ejector tube is sequentially an air inlet section for a docking nozzle and the throat section along an air inlet direction;

the second draws penetrates the pipe fitting and is used for the first air inlet section that draws the pipe fitting along the direction of admitting air in proper order the venturi section with be used for connecting the changeover portion that mixes the gas dish.

Through setting up first pipe fitting of drawing including admitting air section and throat section, the second draws the pipe fitting including the section of admitting air, throat section and changeover portion, make the first throat section of drawing the pipe fitting dock the second and draw the section of admitting air of pipe fitting, gaseous velocity of flow is big in the throat section on the one hand, can draw the section of admitting air of pipe fitting to obtain bigger gas velocity at the second, the section area of admitting air of pipe fitting is drawn to the on the other hand second is great, more be favorable to the air admission, further improve 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 that first draws the pipe fitting littleer for axial interval between two pipe fittings is closer to the nozzle, and the second draws the pipe fitting and can inhale the gas that does not get into first drawing the pipe fitting, reduces the gas and leaks the risk.

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

The axial interval between the first injection pipe fitting and the second injection pipe fitting is 6-12 mm, and the second injection pipe fitting can obtain a larger primary air coefficient within the axial interval range.

Another technical scheme adopted by the application is as follows: there is provided an upper intake burner comprising:

the ejector;

the air distribution disc is arranged on the ejector and provided with an inner ring air homogenizing cavity communicated with the air mixing cavity of the inner ring air mixing disc and an outer ring air homogenizing 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 burner provided by the application is provided with the air distribution disc on the ejector, the inner ring air mixing cavity and the outer ring air mixing 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 mixing gas provided by the ejector is fully mixed with secondary air, the oxygen supply amount is improved, the gas air mixing 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 intake side of the eductor.

Through setting up the nozzle holder in the side of admitting air of ejector, reduce this last air inlet burner assembly height in the direction of height, reduce the combustor volume.

In some embodiments, the nozzle mount includes a mounting for mounting the nozzle, the mounting and the eductor define an enclosed space, and each nozzle and each gas inlet are located in the enclosed 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 docking with the ejector. The air inlet end of each nozzle, the inner ring injection pipe and the air inlet end of each outer ring injection pipe are all surrounded in the closed area, so that the risk of foreign matter entering can be reduced, and secondary air is prevented from being robbed.

In some embodiments, the gas distribution disc comprises an inner ring disc part provided with the inner ring gas homogenizing cavity and an outer ring disc part provided with the outer ring gas homogenizing cavity, and an inter-ring gap is formed between the inner ring disc part and the outer ring disc 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 gap is communicated with the secondary air inlet cavity.

Through set up the inter-ring space, outer loop gas port and secondary air chamber of admitting air on dividing the gas dish, the outer loop gas port is used for supplying the gas and the primary air of outer loop to get into, and the secondary air chamber of admitting air is used for supplying the secondary air to get into. The space between the rings is communicated with the secondary air inlet cavity, so that the condition of secondary air entering the inner ring and the outer ring is improved, and the combustion efficiency is improved.

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

Through setting up the outer loop shirt rim for the gas distribution dish has bigger coverage area, can cover the ejector completely, consequently can block foreign matter and get into the butt joint department of nozzle and injection pipe, avoids the nozzle to block up.

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

Through setting up the inner ring fire lid into the annular for the bottom of a boiler greasy dirt can directly flow into the gas distribution dish from the center cavity of inner ring fire lid and inner ring gas mixing dish, and the gas distribution dish can be pulled down, convenient washing.

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

The application provides a be provided with last air intake burner who takes above-mentioned ejector in the gas-cooker, because primary air and secondary air are equallyd divide do not get into by ejector and minute gas dish department, the ejector is located gas-cooker panel top, consequently this gas-cooker adopts be last air intake mode, based on last air intake burner structural design of ejector and, the gas-cooker that this application provided has and is convenient for arrange the gas pipeline, advantage that combustion effect is good, compare in the power of current last air intake burner all be less than 4.5kW, the heat load of last air intake burner of this application can reach big firepower 5.2 KW.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

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

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

Fig. 4 shows a cross-sectional view a-a of the eductor of fig. 3.

Fig. 5 shows a schematic structural diagram of an upper air inlet burner in an embodiment of the present application.

Fig. 6 shows a full section view of the upper intake burner of fig. 5.

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

Fig. 8 is a view showing an assembly structure of an injector and a nozzle holder in the upper inlet burner of fig. 5.

Fig. 9 shows a schematic structural view of the air-distributing disk in the upper intake burner of fig. 5.

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

FIG. 11 shows a B-B cross-sectional view of the gas distribution plate of FIG. 10.

Fig. 12 shows a schematic structural view of a gas range in the embodiment of the present application.

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

1100-upper air intake burner; 100-an ejector; 200-nozzle holder, 210-nozzle, 220-mounting holder, 230-closed space; 300-gas distribution disc, 310-outer ring disc part, 311-outer ring uniform gas cavity, 320-inner ring disc part, 321-inner ring uniform gas cavity, 330-inter-ring gap, 340-outer ring gas port, 350-secondary air inlet cavity and 360-outer ring skirt; 400-outer ring fire cover; 500-inner ring fire lid.

1000-gas range; 1100-upper air intake burner; 1200-a cookware support; 1300-panel.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the correlation technique, in the last air inlet burner of the horizontal arrangement of gas-cooker, draw and penetrate the pipe or set up on the base, the inner ring is often single and draws and penetrates the pipe, and the outer loop draws and penetrates the pipe and generally be 2 ~ 4, and 2 ~ 4 outer loops draw and penetrate the pipe with the syntropy along circumference evenly distributed. The ejector with the inner ring for single ejection and the outer ring for double ejection is taken as an example, the two outer ring ejection pipes are distributed on the lower surface of the outer ring ejection disc in the same rotating direction, and 3 nozzles are also distributed at intervals along the circumference, so that a gas pipeline is longer and is easy to wind. In addition, because the two outer ring injection pipes are distributed on the lower surface of the outer ring injection disc in a same-rotation central symmetry manner, a three-channel gas valve needs to be configured on the injector, and the whole structure of the gas stove is complex.

Therefore, the embodiment of the application provides an ejector, an upper air inlet burner and a gas stove, and the technical problem that the gas stove in the prior art is complex in structure can be solved to a certain extent at least.

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

example 1:

the embodiment of the 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 at various viewing angles. The ejector 100 has a double-ring structure and comprises an inner ring air mixing disc 140, an outer ring air mixing disc 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 air mixing disc 140 and the outer ring air mixing disc 130, the pipe cavity of the inner ring injection pipe 120 is communicated with the air mixing cavity 141 of the inner ring air mixing disc 140, and the pipe cavity of each outer ring injection pipe 110 is respectively communicated with the air mixing cavity 131 of the outer ring air mixing disc 130 to form an injection passage 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 ends of the outer ring ejector pipes 110 are located 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 the outer ring ejector pipes 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 located on the same position, which is convenient for arranging the nozzle 210 and the corresponding gas pipeline and is convenient for developing the subsequent maintenance work. In some embodiments, the ejector 100 may also be configured as a multi-ring structure, for example, a three-ring structure including an inner ring, a middle ring, and an outer ring, where the number of the ejector pipes in the middle ring is more than one, the number of the ejector pipes in the outer ring is more than two, and the air inlet ends of the ejector pipes are located on the same side.

Because in the ejector 100 of the application, the air inlet end positions of the ejector pipes are concentrated, so that the problem of 'air robbery' needs to be considered, 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, mutual interference between the inner and outer ring ejector pipes 110 in the process of ejecting primary air is prevented, the primary air coefficient is prevented from being reduced, and the ejection performance of the burner is improved.

Specifically, in the ejector 100, the outer ring air mixing disc 130 is annular, the inner ring air mixing disc 140 can adopt a ring groove structure, and a cavity is arranged in the center; the inner ring air mixing disc 140 may also adopt a circular groove structure. To enhance the secondary air, in some embodiments, the inner and outer

air mixing discs

140, 130 are annular, and the central cavity of the inner air mixing disc 140 facilitates the entry of the inner secondary air. In some embodiments, the outer ring diameter of the inner ring air mixing disc 140 is smaller than the inner ring diameter of the outer ring air mixing disc 130, so that an inter-ring gap 330 is formed between the inner ring air mixing disc 140 and the outer ring air mixing disc 130, and the inter-ring gap 330 and the central cavity of the inner ring air mixing disc 140 are respectively communicated with the outside.

To prevent the inner and outer rings from being blown, in some embodiments, the injector 100 further includes a docking portion 160, and the docking portion 160 facilitates the assembly or connection of the injector 100 with other accessories of the gas range 1000. The butt joint part 160 is provided with a containing cavity 161, the containing cavity 161 is used for containing the air inlet end of the inner ring injection pipe 120 and the air inlet end of each outer ring injection pipe 110, 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 through the arrangement of the butt joint part 160, so that the primary air inlet area and the secondary air inlet area of the injector 100 are separated, the air robbing of primary air and secondary air is avoided, and the injection performance of the combustor is improved. Since the partition 150 is used to partition the air inlet end of each ejector tube, the corresponding partition 150 is also located in the accommodating chamber 161. The partition 150 is connected to the abutting portion 160, and for example, the partition 150 and the connecting portion may be provided as an integral 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 air mixing disc 130. In some embodiments, each of the two outer ring ejector pipes 110 includes a straight pipe section 110a and a bent pipe section 110b, the straight pipe section 110a and the bent pipe section 110b are disposed along the air inlet direction and are connected into a whole, the straight pipe section 110a is used for abutting the nozzle 210, and the bent pipe section 110b is connected to the outer ring air mixing plate 130. Considering that the outer ring air mixing disc 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 air mixing disc 130 by using the bending structure thereof, so as to increase the extension length of the bent pipe sections 110 b. The two bent pipe sections 110b have opposite rotation directions, that is, the two bent pipe sections 110b are distributed in a splayed 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-channel gas valves.

The inner ring injection pipe 120 is an integral straight pipe, the inner ring injection pipe 120 is positioned 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 the injection pipes and the nozzle 210 are conveniently arranged. In some embodiments, two outer ring ejector pipes 110 of the ejector 100 are provided, and two partition plates 150 are correspondingly required to be arranged, and the two straight pipe sections 110a and the inner ring ejector pipe 120 are respectively separated by the two partition plates 150, so that the inner ring and the outer ring are prevented from being subjected to gas robbery.

In order to improve the outer ring and draw the ability of penetrating pipe 110, at least one outer ring draws penetrates pipe 110 and adopts the multistage to draw and penetrates the structure, it is concrete, in some embodiments, the outer ring draws penetrates pipe 110 and is the multistage structure, pipe fitting including the interval setting more than two, two pipe fittings can adopt axial interval distribution or radial interval distribution, thereby form the clearance that supplies the air admission between two pipe fittings, make primary air not only can draw the inlet end entering of penetrating pipe 110 from the outer ring, can also get into from this interval, thereby improve the air factor, and then improve the outer ring and draw the ability of penetrating pipe 110, increase the heat load of combustor. In specific implementation, only one of the outer ring injection pipes 110 may be designed as the multi-segment injection structure, or all the outer ring injection pipes 110 may be designed as the multi-segment injection structure.

In some embodiments, the outer ring ejector pipe 110 has an axial double-section structure, and specifically includes a first ejector pipe 111 and a second ejector pipe 112, where the first ejector pipe 111 and the second ejector pipe 112 are two independent pipes and both have an air inlet a and an air outlet b. Specifically, the first injection pipe 111 and the second injection pipe 112 are sequentially arranged along the air inlet direction, the air inlet end a of the first injection pipe 111 is used for butting the nozzle 210, and the air outlet end b of the second injection pipe 112 is used for connecting the outer ring air mixing disc 130, so that the first injection pipe 111 and the second injection pipe 112 form a complete injection passage.

There is spatial axial interval 113 at the end b of giving vent to anger of first injection pipe fitting 111 and the inlet end a of second injection pipe fitting 112 along the axial, through setting up this axial interval 113 for primary air can not only get into the outer loop from the inlet end a of first injection pipe fitting 111 and draw and penetrate pipe 110, can also get into the outer loop from this axial interval 113 and draw and penetrate pipe 110, thereby improve the primary air coefficient, and then improve this outer loop and draw and penetrate the ability of drawing of pipe 110, increase the heat load of combustor.

In some embodiments, the length of the first eductor part 111 is less than the length of the second eductor part 112. Through setting up the length that first draws the pipe fitting 111 littleer for axial interval 113 between two pipe fittings is closer to nozzle 210, and the second draws the pipe fitting 112 and can inhale the gas that does not get into first drawing the pipe fitting 111, reduces the gas leakage risk.

In order to improve the ejection capacity of the outer ring ejection pipe 110, the outer ring ejection pipe 110 can be designed to have a "venturi effect" pipeline structure, and the primary air coefficient is improved by utilizing the venturi effect. In some embodiments, the first injection pipe 111 and the second injection pipe 112 may be provided with a "venturi effect" pipe structure, and in other embodiments, only the first injection pipe 111 or the second injection pipe 112 may be provided with a "venturi effect" pipe structure. A venturi is a typical conduit structure having a "venturi effect". In some embodiments, part of the tube section at the outlet end b of the venturi can also be eliminated, namely: the air inlet end a of the pipe fitting is a taper pipe section, and the rest part of the pipe fitting is a straight pipe section 110a with the same pipe diameter as the small-diameter end of the taper pipe section. First draw and penetrate the concrete structure that pipe fitting 111 and second draw penetrated pipe fitting 112 this application does not do the restriction, satisfy exist the throat section can, promptly: the cross-sectional area of one part of the pipe section of the pipe fitting is smaller than that of the air inlet end a, the pipe section with the smaller cross-sectional area forms a throat pipe section, the flow speed of air flow in the throat pipe section is increased, and the primary air coefficient is improved by utilizing the Venturi effect.

In some embodiments, the first injector tube 111 includes an air inlet section 1111 and a throat section 1112, the air inlet section 1111 is a tapered tube section, the cross-sectional area of the air inlet section 1111 decreases in the air inlet direction, and the air inlet end a of the air inlet section 1111 is used for abutting the nozzle 210. First draw and penetrate pipe fitting 111 and outer loop and mix the gas dish 130 and be connected fixedly, perhaps set up first draw and penetrate pipe fitting 111 and outer loop and mix the gas dish 130 and set up to integral type structure, and this application does not do the restriction.

The second injection pipe 112 is sequentially provided with an air inlet section, a throat section 1122 and a transition section 1123 along the air inlet direction, the second injection pipe 112 is of a Venturi tube structure, and the cross-sectional 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 being in butt joint with the first injection pipe fitting 111, specifically, the air inlet section is in butt joint with the throat section 1112 of the first injection pipe fitting 111, and the transition section 1123 is used for being connected with the outer ring air mixing disc 130. Through setting up the first throat section 1112 of drawing the pipe fitting 111 and drawing the inlet section that the pipe fitting 112 was drawn to the second, gas flow rate is big in the throat section 1112 on the one hand, can draw the inlet section that the pipe fitting 112 was drawn to the second and obtain bigger gas flow rate, and the inlet section cross sectional area that the pipe fitting 112 was drawn to the on the other hand second is great, more is favorable to the air admission, improves the admission condition of two pipe fitting axial interval 113 department primary air. In certain embodiments, the second ejector tube 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 tube 111 abuts the throat section 1122 of the second ejector tube 112.

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

In some embodiments, the throat section of the first ejector tube has a diameter of 6-14 mm, such as 6.5mm, 7mm, 8.2mm, 9.5mm, 10mm, 10.5mm, 11mm, 12.5mm, 13.5mm, and the like; the diameter of the throat section of the second injection pipe fitting is 10-16 mm, such as 10.1mm, 10.5mm, 11mm, 12.5mm, 13.5mm, 14mm, 14.5mm, 15.8mm and the like.

In some embodiments, the axial distance 113 between the first injection pipe 111 and the second injection pipe 112 is 6-12 mm, such as 6.5mm, 7mm, 8.2mm, 9.5mm, 10mm, 10.5mm, 11mm, etc. Through setting up that first draw penetrate pipe fitting 111 and second draw penetrate pipe fitting 112 between axial interval 113 be 6 ~ 12mm, in 113 scope of this axial interval, the second draws penetrates pipe fitting 112 and can obtain bigger primary air coefficient.

Example 2:

based on the same inventive concept, the embodiment of the present application provides an upper inlet burner 1100, the upper inlet burner 1100 is an essential component of the gas range 1000, the injector 100 and the nozzle 210 of the upper inlet burner 1100 are both located above the panel 1300 of the gas range 1000, and the primary air and the secondary air are both introduced from the panel 1300, thus being "upper inlet".

Referring to fig. 5 to 7, the upper intake burner 1100 includes the ejector 100, the gas distribution plate 300, the nozzle holder 200, the inner ring fire cover 500 and the outer ring fire cover 400, and the ejector 100 specifically adopts the ejector 100 of embodiment 1, and the specific structure is not described again here. The gas distribution disc 300 is arranged on the ejector 100 and used for uniformly distributing and mixing gas and air injected by the ejector 100, the inner-ring uniform air cavity 321 and the outer-ring uniform air cavity 311 of the gas distribution disc 300 are respectively communicated with the gas mixing cavity 141 of the inner-ring gas mixing disc 140 of the ejector 100 and the gas mixing cavity 131 of the outer-ring gas mixing disc 130, so that the gas-air mixed gas and secondary air provided by the ejector 100 are fully mixed, the oxygen supply amount is improved, the gas-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 holder 200 is provided with two or more nozzles 210, the nozzles 210 are connected to a gas pipeline and inject gas into each injection pipe, the positions of the nozzles 210 correspond to the inner ring injection pipes 120 and the outer ring injection pipes 110 one by one, and the nozzles 210 are close to the gas inlet ends of the injection pipes, in some embodiments, a plurality of nozzles 210 may be configured for one or more 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 air distribution plate 300, and a plurality of fire holes are arranged on the fire covers for gas combustion.

In the upper intake burner 1100, the ejector 100, the gas distribution plate 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 also be assembled below the ejector 100 in the height direction. In some embodiments, nozzle carrier 200 is assembled with injector 100 in the air intake direction. Referring to fig. 8, the nozzle holder 200 is located on the air intake side of the ejector 100, and the nozzle holder 200 and the ejector 100 are horizontally arranged side by side. By disposing the nozzle holder 200 on the intake side of the injector 100, the assembly height of the upper intake 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 mounting and fixing of each nozzle 210. The mounting socket 220 is used to mount the nozzle 210 and dock with the injector 100. Referring to fig. 8 in some embodiments, the mounting seat 220 is a frame-shaped plate, the frame-shaped plate also has an accommodating cavity 161, two ends of the frame-shaped plate are assembled and connected with the abutting portion 160 of the injector 100, so that the frame-shaped plate and the accommodating cavity 161 of the abutting portion 160 are integrated to form a horizontally closed region, and the air inlet ends of the nozzles 210, the inner ring injection pipe 120, and the outer ring injection pipes 110 are enclosed therein, for example, the air inlet ends of the nozzles 210, the inner ring injection pipe 120, and the first injection pipe of the outer ring injection pipes 110 are located in the closed region 230, so as to reduce the risk of entering of foreign matters and prevent a secondary air from being blown in. Each partition 150 divides the enclosed space 230 into separate cells to prevent gas snatching in the inner and outer rings.

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

In some embodiments, the gas distribution plate 300 further includes an outer ring skirt 360, the gas distribution plate 300 is of an integrated structure, the inner ring disk part 320 and the outer ring disk part 310 are both connected to the outer ring skirt 360, and the outer ring skirt 360 has a larger outer diameter, so that the gas distribution plate 300 has a larger coverage area and can completely cover the ejector 100, thereby preventing foreign matters from entering the butt joint between the nozzle 210 and the ejector pipe and avoiding the nozzle 210 from being blocked.

In the upper inlet burner 1100, the specific number of the burner caps is determined according to the number of the rings of the upper inlet burner 1100, and in general, the upper inlet burner 1100 having a double ring structure is provided with two inner and outer burner caps, and the upper inlet burner 1100 having a triple ring structure is provided with three burner caps of an inner ring, a middle ring, and an outer ring. The middle ring and outer ring fire cover 400 at the outer side is generally ring-shaped, and the inner ring fire cover 500 at the inner side may be provided in a ring shape or a circular shape. In some embodiments, the inner ring fire cover 500 is configured to be annular, so that oil stain on the bottom of the pan can directly flow into the air distribution plate 300 from the central cavities of the inner ring fire cover 500 and the inner ring air mixing plate 140, and the air distribution plate 300 can be detached to facilitate cleaning.

Example 3:

based on the same inventive concept, the present embodiment provides a gas range 1000, and like the existing gas range 1000, the gas range 1000 of the present embodiment mainly includes a panel 1300, a burner, a cooker support 1200 for placing a cooker, and other necessary accessories such as a thermocouple and an ignition pin. 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 the primary air and the secondary air both enter from above the panel 1300.

Referring to fig. 12, unlike the prior art, the gas range 1000 of the present embodiment has a burner that uses the upper inlet burner 1100 of embodiment 2, a thermocouple, an ignition pin, etc. are mounted on the gas distributor 300, and the specific structure of the upper inlet burner 1100 refers to embodiment 2, and will not be described herein again. Since the present embodiment does not improve the panel 1300, the bracket, the ignition pin, and other accessories of the gas stove 1000, the specific structure can refer to the existing disclosure, and other structures not described in detail in the gas stove 1000 can refer to the related disclosure in the prior art, and the specific content is not described herein.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to 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 based on the orientation or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," 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 application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of 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: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An ejector, comprising:

the inner ring air mixing disc is provided with an air mixing cavity;

the outer ring air mixing disc is provided with an air mixing cavity;

2. The eductor as defined in claim 1 wherein: the ejector further comprises a partition plate, and the partition plate partitions the air inlet area of the inner ring ejector pipe and the air inlet area of the outer ring ejector pipe.

3. The eductor as defined in claim 2 wherein: the ejector further comprises a butt joint part, and the butt joint part is provided with an accommodating cavity for accommodating the air inlet end; the partition is connected to the docking portion.

4. The eductor as defined in claim 2 wherein: the two outer ring injection pipes comprise 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 direction in a reverse rotation direction;

5. The eductor as defined in any one of claims 1-4, wherein: at least one outer ring draws the pipe and includes the pipe fitting that more than two intervals set up.

6. The eductor as defined in claim 5 wherein: the outer ring draws penetrates the pipe and includes:

7. The eductor as defined in claim 6 wherein: the first injection pipe fitting and/or the second injection pipe fitting are/is provided with a throat pipe section with the cross-sectional area smaller than the air inlet end of the pipe fitting.

8. The eductor as defined in claim 7 wherein: the first injection pipe fitting and the second injection pipe fitting are both provided with the throat pipe sections, and the cross sectional area of the throat pipe sections of the first injection pipe fitting is smaller than that of the throat pipe sections of the second injection pipe fitting.

9. The eductor as defined in claim 8 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.

10. The eductor as defined in claim 8 wherein: the first injection pipe fitting sequentially comprises an air inlet section and a throat section along the air inlet direction, wherein the air inlet section is used for butting a nozzle;

11. The eductor as defined in any one of claims 6 to 10 wherein: the length of the first injection pipe fitting is smaller than that of the second injection pipe fitting.

12. The eductor as defined in any one of claims 6-10 wherein: the axial interval is 6-12 mm.

13. An upper intake air burner, comprising:

the ejector of any one of claims 1-12;

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.

14. The upper intake burner of claim 13, wherein: the nozzle seat is located on the air inlet side of the ejector.

15. The upper intake burner of claim 14, wherein: the nozzle seat comprises a mounting seat for mounting the nozzles, the mounting seat and the ejector are encircled to form a closed space, and each nozzle and each air inlet end are located in the closed space.

16. The upper intake burner of any one of claims 13-15, wherein: the gas distribution disc comprises an inner ring disc part provided with the inner ring gas-homogenizing cavity and an outer ring disc part provided with the outer ring gas-homogenizing cavity, and an inter-ring gap is formed between the inner ring disc part and the outer ring disc part;

17. The upper intake burner of claim 16, wherein: the air distribution disc further comprises an outer ring skirt edge, and the ejector is covered by the vertical projection of the outer ring skirt edge.

18. The upper intake burner of any one of claims 13-15, wherein: the inner ring fire cover is annular.

19. A gas stove is characterized in that: comprising an upper intake air burner as claimed in any one of claims 13 to 18.