An ejector pipe, an ejector, an updraft burner and a gas stove

Abstract

The application discloses an ejector pipe, an ejector, an upwind burner and a gas stove, and solves the technical problem of a complex structure and a large volume of the gas stove. The ejector pipe comprises a first ejector pipe part and a second ejector pipe part arranged in sequence along an air inlet direction, wherein the air inlet end of the first ejector pipe part is used for abutting against a nozzle, and the air outlet end of the second ejector pipe part is used for connecting a gas mixing disc, so as to form an ejector channel. The first ejector pipe part and the second ejector pipe part have an axial interval, so that primary air can not only enter the ejector pipe from the air inlet end of the first ejector pipe part, but also enter the ejector pipe from the axial interval, thereby improving a primary air coefficient. Compared with the related art, in order to improve the ejecting performance of the burner, a plurality of ejector pipes are adopted, so that the structure is complex. The application improves the primary air coefficient and increases the ejecting capacity by improving the structure of the ejector pipe, and the number of the ejector pipes is not increased, so that the ejector has a simple structure and a small volume.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of kitchen utensils, and particularly relates to an ejector pipe, an ejector, an updraft burner and a gas stove. BACKGROUND

[0002] In order to improve the heat load of the gas stove burner, the current burner is generally configured with multiple ejector pipes and multiple nozzles, so that the burner structure is complex and large in size. SUMMARY

[0003] To solve the technical problems of the current gas stove structure being complex and large in size, the application provides an ejector pipe, an ejector, an updraft burner and a gas stove.

[0004] One of the technical solutions adopted by the application is to provide an ejector pipe, which comprises:

[0005] The first ejector pipe part has a gas outlet end and a gas inlet end for connecting a nozzle;

[0006] The second ejector pipe part has a gas inlet end and a gas outlet end for connecting a gas mixing disc;

[0007] The first ejector pipe part and the second ejector pipe part are sequentially arranged along the gas inlet direction, and the gas outlet end of the first ejector pipe part and the gas inlet end of the second ejector pipe part have an axial interval.

[0008] As can be known from the above technical solution, the ejector pipe provided by the application comprises a first ejector pipe part and a second ejector pipe part sequentially arranged along the gas inlet direction. The first ejector pipe part and the second ejector pipe part are two independent pipe sections, each having a gas inlet end and a gas outlet end. The gas inlet end of the first ejector pipe part is used for connecting a nozzle, and the gas outlet end of the second ejector pipe part is used for connecting a gas mixing disc, thereby forming an ejector channel. In the ejector pipe provided by the application, the gas outlet end of the first ejector pipe part and the gas inlet end of the second ejector pipe part have an axial interval. By arranging the axial interval, primary air can not only enter the ejector pipe from the gas inlet end of the first ejector pipe part, but also enter the ejector pipe from the axial interval, thereby improving the primary air coefficient, further improving the ejector capacity of the ejector pipe and increasing the heat load of the burner.

[0009] The ejector pipe provided by the application adopts a segmented structure, so that there is a space axial interval in the axial direction of the ejector pipe for primary air to enter. Compared with the related art, in order to improve the ejector performance of the burner, the ejector structure with multiple ejector pipes leads to a complex structure and a large number of nozzles. The application improves the primary air coefficient by improving the structure of the ejector pipe, and the number of ejector pipes is not increased. Therefore, the volume is small when implemented, and the number of nozzles to be configured is small, thereby reducing the risk of gas leakage.

[0010] In some embodiments, the first ejector pipe and / or the second ejector pipe has a throat section with a cross-sectional area smaller than the cross-sectional area of the inlet end of the pipe.

[0011] By providing a throat section in the ejector pipe, the pipe with the throat section can utilize the Venturi effect to increase the primary air coefficient, because the cross-sectional area of the throat section is smaller than the cross-sectional area of the inlet end of the pipe.

[0012] In some embodiments, both the first ejector pipe and the second ejector pipe have the throat section, and the cross-sectional area of the throat section of the first ejector pipe is smaller than the cross-sectional area of the throat section of the second ejector pipe.

[0013] By providing the cross-sectional area of the throat section of the first ejector pipe to be no larger than the cross-sectional area of the throat section of the second ejector pipe, the gas flow rate in the throat section of the first ejector pipe is larger, and the gas flow rate at the inlet end of the second ejector pipe is larger, making it easier to entrain primary air and improving the entry of primary air at the axial interval between the two pipes.

[0014] In some embodiments, the first ejector pipe sequentially comprises, along the gas inlet direction, an inlet section for abutting the nozzle and the throat section.

[0015] The second ejector pipe sequentially comprises, along the gas inlet direction, an inlet section for abutting the first ejector pipe, the throat section, and a transition section for connecting the mixing disc.

[0016] By providing the first ejector pipe to comprise an inlet section and a throat section, and the second ejector pipe to comprise an inlet section, a throat section, and a transition section, the throat section of the first ejector pipe abuts the inlet section of the second ejector pipe, on the one hand, the gas flow rate in the throat section is large, and on the other hand, the cross-sectional area of the inlet section of the second ejector pipe is large, making it easier for primary air to enter, and further improving the entry of primary air at the axial interval between the two pipes.

[0017] In some embodiments, the length of the first ejector pipe is smaller than the length of the second ejector pipe.

[0018] By providing the first ejector pipe to have a smaller length, the axial interval between the two pipes is closer to the nozzle, and the second ejector pipe can suck in the gas that has not entered the first ejector pipe, reducing the risk of gas leakage.

[0019] In some embodiments, the axial interval is 6-12 mm.

[0020] By providing the axial interval between the first ejector pipe and the second ejector pipe to be 6-12 mm, the second ejector pipe can obtain a larger primary air coefficient in this axial interval.

[0021] Another technical scheme adopted in the present application is to provide an ejector comprising:

[0022] The gas mixing disc is provided with a gas mixing cavity;

[0023] The gas outlet end of the second ejector pipe of the ejector pipe is in communication with the gas mixing cavity;

[0024] At least one inner partition plate is arranged in the ejector pipe in the air inlet direction, so that at least part of the pipe cavity of the ejector pipe is divided into two or more channel branches.

[0025] Compared with the prior art, the ejector provided in the present application adopts a "multi-section + multi-channel" ejector pipe structure, and the inner partition plate is arranged to divide at least part of the pipe cavity of the ejector pipe into two or more channel branches, so that the ejector pipe provided in the present application has two or more ejector channels, and thus a plurality of nozzles can be connected at the same time. By increasing the contact area of the high-speed fluid and the air, it is easier to entrain the primary air, thereby improving the ejecting capacity of the ejector. The channel branches are separated by the inner partition plate and are independent of each other, which can prevent air flow interference caused by multi-nozzle ejecting and improve the primary air coefficient.

[0026] In some embodiments, the gas mixing disc comprises an outer ring gas mixing disc and an inner ring gas mixing disc;

[0027] The ejector pipe is provided with two, namely an inner ring ejector pipe and an outer ring ejector pipe, the inner ring ejector pipe is in communication with the gas mixing cavity of the inner ring gas mixing disc, and the outer ring ejector pipe comprises the first ejector pipe and the second ejector pipe, the second ejector pipe is in communication with the gas mixing cavity of the outer ring gas mixing disc;

[0028] The inner partition plate is provided with two, and the two inner partition plates are arranged in the first ejector pipe and the second ejector pipe respectively.

[0029] By arranging the ejector into a multi-ring structure, the combustion area is increased. Since the outer ring has a larger ejecting capacity, the inner partition plate is arranged in the outer ring ejector pipe, so that the outer ring ejector pipe has a multi-section, multi-channel branch structure, can connect a plurality of nozzles, and the primary air inlet capacity is increased, thereby improving the outer ring ejecting capacity.

[0030] In some embodiments, the air inlet end of the inner ring ejector pipe and the air inlet end of the outer ring ejector pipe are located on the same side;

[0031] The ejector further comprises an outer partition plate, and the outer partition plate separates the air inlet area of the inner ring ejector pipe and the air inlet area of the outer ring ejector pipe.

[0032] By setting the air inlet ends of the inner and outer annular ejector pipes on the same side, the nozzle and the corresponding gas pipeline can be arranged conveniently; by setting the outer partition plate, the outer partition plate separates the air inlet area of the inner annular ejector pipe from the air inlet area of the outer annular ejector pipe, so that the primary air inlet passage of the inner annular ejector pipe is separated from the primary air inlet passage of the outer annular ejector pipe, preventing mutual interference of the inner and outer annular ejector pipes during the process of ejecting primary air, thereby improving the ejecting performance of the combustor.

[0033] In some embodiments, the air inlet end of the inner annular ejector pipe and the air inlet end of the outer annular ejector pipe are both provided with a flow distribution baffle, which separates the primary air inlet area from the secondary air inlet area.

[0034] By setting the flow distribution baffle, the primary air inlet area of the ejector can be separated from the secondary air inlet area, so that the primary air and the secondary air do not compete for air, thereby improving the ejecting performance of the combustor.

[0035] In some embodiments, a convex edge is arranged at the air inlet of the inner annular ejector pipe and at the air inlet of the outer annular ejector pipe; the convex edge is connected to the outer annular mixing disc, and the total length of the convex edge is greater than the outer annular radius of the outer annular mixing disc; the convex edge constitutes the flow distribution baffle.

[0036] By arranging the convex edge at the air inlet of the ejector pipe and connecting the convex edge to the outer annular mixing disc, the convex edge is located between the gas nozzle and the annular gap, and since the length of the convex edge is relatively long and exceeds the outer annular radius of the outer annular mixing disc, the convex edge can effectively separate the primary air inlet area close to the gas nozzle from the annular gap for secondary air inlet.

[0037] In some embodiments, the first ejector pipe part and the second ejector pipe part of the outer annular ejector pipe both have a throat pipe section with a cross-sectional area smaller than that of the air inlet end; the inner partition plate is arranged in the throat pipe section, and one end of the inner partition plate is flush with the air inlet end of the throat pipe section.

[0038] Since the cross-sectional area of the throat pipe section is small, the flow velocity of the gas flow in the throat pipe section is greater than that of the air inlet end, and the gas flow is prone to collision, superposition and mutual interference. By arranging the inner partition plate in the throat pipe section, the gas flow can be separated, so that the gas-air mixture flow flows independently in a limited space, preventing the gas flow interference caused by double-nozzle or multi-nozzle ejection, and improving the primary air coefficient.

[0039] In some embodiments, the throat pipe section is a straight pipe section with a waist-shaped cross section; and the inner partition plate is located on the center symmetry plane of the straight pipe section.

[0040] By setting the throat section as a straight pipe section with a waist-shaped cross section, the waist-shaped structure has long straight edges, facilitating the connection of the throat section and the mixing disc, and the arc-shaped section of the waist-shaped structure is beneficial to reducing the flow resistance of the airflow; the inner partition plate is located on the center symmetry plane of the straight pipe section, ensuring that the cross-sectional areas of the various passage branches are equal, and the primary air distribution is uniform.

[0041] Another technical solution adopted by the application is to provide an updraft combustion device, comprising:

[0042] The ejector described above;

[0043] The base support is provided with two or more nozzles, and the air inlet end of the ejector pipe provided with the inner partition plate is configured with two or more nozzles, and the two or more nozzles correspond to the two or more passage branches one by one.

[0044] The fire cover is arranged on the mixing disc of the ejector.

[0045] By arranging multiple nozzles at the air inlet end of the ejector pipe with an inner partition plate, multi-nozzle injection is achieved, which can increase the contact area of high-speed fluid and air, and cooperate with the multi-section structure of the ejector pipe, so that the primary air is more easily entrained, thereby improving the entraining capacity of the updraft combustion device.

[0046] In some embodiments, the fire cover includes an outer ring fire cover and an inner ring fire cover, and the outer ring fire cover and the inner ring fire cover are both annular.

[0047] By arranging the inner and outer ring fire covers as annular, the secondary air can be easily introduced, which can improve the secondary air introduction of the central fire and the outer ring fire, thereby improving the combustion efficiency.

[0048] Yet another technical solution adopted by the application is to provide a gas stove comprising the updraft combustion device described above.

[0049] The gas stove provided by the application is provided with the updraft combustion device with the ejector described above, since the primary air and the secondary air both enter from the ejector, and the ejector is located above the gas stove panel, the gas stove adopts an updraft mode, based on the structural design of the ejector pipe in the ejector, the volume of the ejector pipe is smaller without affecting the entraining capacity of the ejector, and the ejector pipe is more suitable for application in the limited space structure of the updraft combustion device. The ejector pipe adopts a multi-section + multi-nozzle ejecting structure. By increasing the contact area of high-speed fluid and air, the primary air is more easily entrained, thereby improving the entraining capacity of the updraft combustion device and the thermal efficiency of the gas stove. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0051] Figure 1 The structural schematic diagram of the ejector in the embodiment of the present application is shown.

[0052] Figure 2 The structural schematic diagram of the ejector in the embodiment of the present application is shown.

[0053] Figure 3 The front view of the ejector of Figure 2 is shown.

[0054] Figure 4 The top view of the ejector of Figure 2 is shown.

[0055] Figure 5 The bottom view of the ejector of Figure 2 is shown.

[0056] Figure 6 The A-A cross-sectional view of the ejector of Figure 5 is shown.

[0057] Figure 7 The structural schematic diagram of the updraft combustion chamber in the embodiment of the present application is shown.

[0058] Figure 8 The structural schematic diagram of the base support in the updraft combustion chamber of Figure 7 is shown.

[0059] Figure 9 The exploded view of the updraft combustion chamber of Figure 7 is shown.

[0060] Figure 10 The structural schematic diagram of the gas stove in the embodiment of the present application is shown.

[0061] Legend: 110-ejector; 111-first ejector part, 1111-inlet section, 1112-throat section; 112-second ejector part, 1121-inlet section, 1122-throat section, 1123-transition section; 113-axial interval; a-inlet end, b-outlet end.

[0062] 100 - ejector; 10 - outer ring gas mixing disc, 11 - gas mixing cavity of the outer ring gas mixing disc; 20 - inner ring gas mixing disc, 21 - gas mixing cavity of the inner ring gas mixing disc, 22 - central cavity; 30 - outer ring ejector tube, 31 - first ejector tube part, 32 - second ejector tube part, 33 - axial interval, 34 - passage branch; 40 - inner ring ejector tube; 50 - inner partition plate; 60 - outer partition plate; 70 - shunt baffle, 71 - convex edge; 80 - positioning groove; a - gas inlet end, b - gas outlet end.

[0063] 1100 - upper air inlet burner; 100 - ejector; 200 - base support, 201 - nozzle, 202 - positioning block; 300 - inner ring fire cover; 400 - outer ring fire cover.

[0064] 1000 - gas stove; 1100 - upper air inlet burner; 1200 - cookware support; 1300 - panel. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0066] In addition, reference numbers and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not 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 those skilled in the art can realize the application of other processes and / or the use of other materials.

[0067] The embodiments of the present application provide an ejector tube, an ejector, an upper air inlet burner and a gas stove, which adopt multi-stage ejection and can at least solve the technical problem of small heat load of the prior art upper air inlet gas stove to some extent.

[0068] The embodiments of the present application will be described below with reference to the drawings and specific embodiments:

[0069] Embodiment 1:

[0070] The embodiments of the present application provide an ejector tube 110, which is an important structure in a burner, one end of which is connected to a nozzle for the entry of fuel gas and primary air, and the other end of which is connected to a gas mixing disc to uniformly distribute the fuel gas and air mixture. As shown in FIG. 1, the ejector tube 110 is connected to the nozzle 201 through the positioning groove 80, and the outer ring gas mixing disc 10 is connected to the inner ring gas mixing disc 20 through the inner partition plate 50 and the outer partition plate 60. Figure 1As shown in the overall structure diagram of the ejector, the ejector tube 110 of the present application comprises a first ejector tube member 111 and a second ejector tube member 112, and the first ejector tube member 111 and the second ejector tube member 112 are two independent tube members and each has an air inlet end a and an air outlet end b. Specifically, the first ejector tube member 111 and the second ejector tube member 112 are sequentially arranged along the air inlet direction, the air inlet end a of the first ejector tube member 111 is used for abutting the nozzle, and the air outlet end b of the second ejector tube member 112 is used for connecting the mixing disc, so that the first ejector tube member 111 and the second ejector tube member 112 form a complete ejector channel.

[0071] The air outlet end b of the first ejector tube member 111 and the air inlet end a of the second ejector tube member 112 are axially spaced apart along the axial direction by an axial spacing 113. By arranging the axial spacing 113, the primary air can not only enter the ejector tube 110 from the air inlet end a of the first ejector tube member 111, but also enter the ejector tube 110 from the axial spacing 113, thereby improving the primary air coefficient and further improving the ejecting capacity of the ejector tube 110 and increasing the heat load of the combustor.

[0072] In some embodiments, the length of the first ejector tube member 111 is smaller than the length of the second ejector tube member 112. By arranging the first ejector tube member 111 to be smaller in length, the axial spacing 113 between the two tube members is closer to the nozzle, and the second ejector tube member 112 can suck the gas that does not enter the first ejector tube member 111, thereby reducing the risk of gas leakage.

[0073] In order to improve the ejecting capacity of the ejector tube 110, the ejector tube 110 can be designed to have a "Venturi effect" pipe structure, and the primary air coefficient is improved by using the "Venturi effect". In some embodiments, the first ejector tube member 111 and the second ejector tube member 112 can both be arranged to have a "Venturi effect" pipe structure, and in other embodiments, only the first ejector tube member 111 or the second ejector tube member 112 can be arranged to have a "Venturi effect" pipe structure. A Venturi tube is a typical pipe structure with "Venturi effect". In some embodiments, part of the air outlet end b of the Venturi tube can be cancelled, i.e., the air inlet end a of the tube member is a tapered pipe segment, and the remaining part is a straight pipe segment with the same diameter as the small diameter end of the tapered pipe segment. The specific structure of the first ejector tube member 111 and the second ejector tube member 112 is not limited in the present application, and it is only required to have a throat pipe segment, i.e., one part of the pipe segment has a cross-sectional area smaller than that of the air inlet end a, and the pipe segment with the smaller cross-sectional area constitutes the throat pipe segment, and the flow rate of the gas flow increases in the throat pipe segment, thereby improving the primary air coefficient by using the "Venturi effect".

[0074] In some embodiments, the first ejector pipe 111 comprises an inlet section 1111 and a throat section 1112, the inlet section 1111 is a tapered pipe section, the cross-sectional area of the inlet section 1111 decreases in sequence along the inlet direction, and the inlet end a of the inlet section 1111 is used to butt joint the nozzle. The second ejector pipe 112 comprises, in sequence along the inlet direction, an inlet section 1121, a throat section 1122 and a transition section 1123, the second ejector pipe 112 is a Venturi structure, and the cross-sectional area of the throat section 1122 is smaller than that of the inlet section 1121 and the transition section 1123. The inlet section 1121 of the second ejector pipe 112 is used to butt joint the first ejector pipe 111, specifically, to butt joint the throat section 1112 of the first ejector pipe 111, and the transition section 1123 is used to connect the mixing disc. By arranging the throat section 1112 of the first ejector pipe 111 to butt joint the inlet section 1121 of the second ejector pipe 112, on the one hand, the gas flow rate in the throat section 1112 is large, which can obtain a larger gas flow rate in the inlet section 1121 of the second ejector pipe 112, and on the other hand, the cross-sectional area of the inlet section 1121 of the second ejector pipe 112 is large, which is more conducive to the entry of primary air, and improves the entry of primary air at the axial interval 113 between the two pipes.

[0075] Referring to Figure 1 In the embodiment, the first ejector pipe 111 and the second ejector pipe 112 both have throat sections, and the cross-sectional area of the throat section of the first ejector pipe 111 is smaller than that of the second ejector pipe 112. By arranging the difference in cross-sectional area, the gas flow rate in the throat section of the first ejector pipe 111 is larger, and a larger gas flow rate can be obtained at the inlet end a of the second ejector pipe 112, which is more conducive to the entrainment of primary air, and improves the entry of primary air at the axial interval 113 between the two pipes.

[0076] The axial interval 113 between the first ejector pipe 111 and the second ejector pipe 112 is 6-12 mm, for example, 6.5 mm, 7 mm, 8.2 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, etc. By arranging the axial interval 113 between the first ejector pipe 111 and the second ejector pipe 112 to be 6-12 mm, the second ejector pipe 112 can obtain a larger primary air coefficient within the axial interval 113.

[0077] Embodiment 2:

[0078] The embodiment of the present application provides an ejector 100, as shown in Figures 2 to 6 is a whole structure diagram and a sectional view of the ejector 100 from various viewing angles. Meanwhile, referring to Figure 7 and Figure 10The ejector 100 is a key component in the upper air inlet burner 1100 of the gas stove 1000, and plays a role of ejecting gas and providing primary air and secondary air. The structure of the ejector 100 directly affects the thermal efficiency of the gas stove 1000. The ejector 100 includes a mixing disc and an ejecting pipe below the mixing disc. The mixing disc is provided with a mixing cavity for the flow of gas-air mixture. The mixing cavity can be circular or annular. The ejecting pipe has a gas inlet end a for the inlet of gas and air, and a gas outlet end for the outlet of the gas-air mixture. The ejector 100 can be a single-ejecting pipe structure or a multi-ejecting pipe structure. In the ejector 100, at least one ejecting pipe is the ejecting pipe of the above-mentioned embodiment 1, that is, the ejecting pipe includes a first ejecting pipe part and a second ejecting pipe part, and the gas outlet end b of the first ejecting pipe part and the gas inlet end a of the second ejecting pipe part are spaced apart in the axial direction. For other details, refer to embodiment 1, which will not be described here.

[0079] Referring to Figure 2 The ejector 100 includes at least one inner baffle 50. The inner baffle 50 is arranged in at least one ejecting pipe of the ejector 100, and is arranged in the gas inlet direction in the ejecting pipe, that is, the inner baffle 50 is parallel to the axial direction of the ejecting pipe, so that at least part of the cavity of the ejecting pipe is divided into two or more channel branches 34. When a plurality of inner baffles 50 are arranged in the ejecting pipe, the plurality of inner baffles 50 can be arranged in parallel or intersected, for example, in a cross shape. That is, the ejector can have the following structures of the ejecting pipe: a one-piece ejecting pipe, a segmented ejecting pipe, and a segmented ejecting pipe with an inner baffle.

[0080] The ejecting pipe provided with the inner baffle 50 has two or more ejecting channels, so that a plurality of nozzles 201 can be connected at the same time. By increasing the contact area of the high-speed fluid and the air, it is easier to entrain the primary air, thereby improving the ejecting capacity of the ejector 100. Each channel branch 34 is separated by the inner baffle 50 and independent of each other, which can prevent air flow interference caused by the multi-nozzle 201 ejecting, and improve the primary air coefficient. Compared with the related art, in order to improve the ejecting performance of the burner, a multi-ejecting pipe ejecting structure is adopted, and two or more channel branches 34 are obtained by arranging the inner baffle 50 in the ejecting pipe. The total volume of the ejecting pipe is small, and it is more suitable for application in the limited space structure of the upper air inlet burner 1100.

[0081] In some embodiments, the ejector 100 has a double-ring structure, and is provided with two mixing disks, namely, an outer ring mixing disk 10 and an inner ring mixing disk 20. The outer ring mixing disk 10 and the inner ring mixing disk 20 both use single-tube ejection, that is, only two ejection tubes are provided in the entire ejector 100, namely, the inner ring ejection tube 40 and the outer ring ejection tube 30. The inner ring ejection tube 40 is connected to the mixing chamber 21 of the inner ring mixing disk 20, and the outer ring ejection tube 30 is connected to the mixing chamber 11 of the outer ring mixing disk 10. In some embodiments, the air inlet end a of the inner ring ejection tube 40 and the air inlet end a of the outer ring ejection tube 30 are located on the same side and in close proximity, which facilitates the arrangement of the nozzle 201 and the corresponding gas pipeline.

[0082] In order to improve the ejection capacity of the ejector tube, the inner ring ejector tube 40 and the outer ring ejector tube 30 can be designed as a pipe structure with a "Venturi effect", and the Venturi effect is used to improve the primary air coefficient. In some embodiments, the cross-sectional area of ​​a portion of the ejector tube is smaller than the cross-sectional area of ​​the air inlet end a, and the pipe section with a smaller cross-sectional area constitutes the throat section 31. The Venturi tube is a typical pipe structure with a "Venturi effect". That is to say, in the present application, the ejector tube can directly adopt the Venturi tube structure, or it can be set as a pipe structure in which the air inlet end a is a tapered pipe section and the remaining part is a straight pipe section with the same diameter as the small diameter end of the tapered pipe section. This application does not impose any restrictions.

[0083] Considering the large demand for outer ring gas injection, the outer ring injection pipe 30 adopts a segmented structure with an internal partition. Figure 6 The outer ring ejector pipe 30 includes a first ejector pipe 31 and a second ejector pipe 32. The first ejector pipe 31 and the second ejector pipe 32 are two independent pipes, and both have an air inlet end a and an air outlet end b. The first ejector pipe 31 and the second ejector pipe 32 are arranged sequentially along the air inlet direction. The air inlet end a of the first ejector pipe 31 is used for docking the nozzle, and the air outlet end b of the second ejector pipe 32 is used to connect to the outer ring mixing disk 10 and communicate with the mixing chamber 11, so that the first ejector pipe 31 and the second ejector pipe 32 form a complete outer ring ejection channel. There is an axial spacing 33 between the air outlet end b of the first ejector pipe 31 and the air inlet end a of the second ejector pipe 32 in the axial direction. The ejection capacity of the outer ring ejector pipe 30 is improved by setting the axial spacing 33. The pipe type and pipe diameter settings of the outer ring ejector pipe 30 can refer to Example 1 and will not be explained in detail here.

[0084] Two inner partitions 50 are provided in the outer ring ejector tube 30, that is, an inner partition 50 is provided in each of the first ejector tube 31 and the second ejector tube 32, so that two channel branches 34 are formed inside the first ejector tube 31 and the second ejector tube 32, and the positions of the two channel branches 34 of the first ejector tube 31 and the second ejector tube 32 correspond one to one.

[0085] The first and second ejection pipe pieces 31 and 32 of the outer ring ejection pipe 30 each have a throat pipe section, i.e., the outer ring ejection pipe 30 is a pipe structure having a "Venturi effect". In some embodiments, the inner ring ejection pipe 40 also has a throat pipe section, so that the inner ring ejection pipe channel first narrows and then widens in the intake direction, and the primary air coefficient is improved by using the Venturi effect.

[0086] The two inner partitions 50 are respectively arranged in the throat pipe sections of the first and second ejection pipe pieces 31 and 32. Since the cross-sectional area of the throat pipe section is small, the flow velocity of the gas flow in the throat pipe section is greater than that at the intake end a, and the gas flow is prone to collision, superposition, and mutual interference. By arranging the inner partition 50 in the throat pipe section, the inner partition 50 can separate the gas flow, so that the gas-air mixture flow independently flows in the limited space, preventing the gas flow interference caused by double-nozzle or multi-nozzle ejection, and improving the primary air coefficient.

[0087] Both the gas and the primary air enter from the intake end a of the ejection pipe. To prevent the gas flow interference caused by double-nozzle or multi-nozzle ejection, the end of the inner partition 50 close to the nozzle is flush with the intake end a of the throat pipe section, so as to ensure that the intake end a of the throat pipe section is divided into two channels, which is conducive to the entry of the gas and the primary air. The length of the inner partition 50 is not greater than the length of the throat pipe section where the inner partition 50 is located. For example, in some embodiments, the inner partition 50 is the same length as the throat pipe section 31, completely avoiding the gas flow interference in the throat pipe section 31. In other embodiments, the length of the inner partition 50 is less than the length of the throat pipe section 31, so that the branch channels 34 can be communicated at the outlet end of the throat pipe section 31, the gas flow collides, the gas-air mixture is further mixed, and then enters the mixing chamber of the mixing disc.

[0088] The cross-sectional shape of the ejection pipe is usually circular or elliptical to reduce the flow resistance. The cross-sectional shape of the ejection pipe can also adopt other shapes, which can be determined according to the specific process, and the present application does not make any limitation. Figures 2 to 5 In some embodiments, the inner ring ejection pipe 40 and the outer ring ejection pipe 30 are both waist-shaped pipes. The waist-shaped structure has a long straight edge, which facilitates the connection of the inner ring ejection pipe 40 and the outer ring ejection pipe 30 with the mixing disc, and the arc-shaped section of the waist-shaped structure is conducive to reducing the flow resistance of the gas flow. The inner partition 50 is located on the center symmetry plane of the waist-shaped structure throat pipe section of the outer ring ejection pipe 30, so as to ensure that the cross-sectional areas of the branch channels 34 are equal, and the primary air is evenly distributed.

[0089] The outer ring gas mixing disc 10 is annular, and the inner ring gas mixing disc 20 can adopt a ring groove structure and has a cavity in the center. The inner ring gas mixing disc 20 can also adopt a circular groove structure. In order to improve the secondary air, in some embodiments, the inner ring gas mixing disc 20 and the outer ring gas mixing disc 10 are both annular, and the central cavity 22 of the inner ring gas mixing disc 20 facilitates the entry of the inner ring secondary air. In some embodiments, the outer ring diameter of the inner ring gas mixing disc 20 is smaller than the inner ring diameter of the outer ring gas mixing disc 10, so that there is a gap between the inner ring gas mixing disc 20 and the outer ring gas mixing disc 10, and the gap and the central cavity 22 of the inner ring gas mixing disc 20 are respectively communicated with the outside. Through the above structure, the entry of the secondary air of the central fire and the outer ring fire can be improved, thereby improving the combustion efficiency.

[0090] In order to prevent the inner and outer rings from stealing air, in some embodiments, the ejector 100 further comprises an outer partition plate 60, which separates the air inlet area of the inner ring ejector pipe 40 from the air inlet area of the outer ring ejector pipe 30, so that the primary air inlet channel of the inner ring ejector pipe 40 is separated from the primary air inlet channel of the outer ring ejector pipe 30, preventing mutual interference between the inner and outer ring ejector pipes 30 during the process of ejecting the primary air, thereby improving the ejecting performance of the combustor.

[0091] In order to prevent the primary and secondary air from stealing air, in some embodiments, the air inlet end a of the inner ring ejector pipe 40 and the air inlet end a of the outer ring ejector pipe 30 are both provided with a shunt baffle 70, which can separate the primary air inlet area (near the nozzle 201) from the secondary air inlet area (the inter-ring gap and the central cavity 22 of the inner ring), thereby preventing the primary and secondary air from stealing air, and improving the ejecting performance of the combustor. The shunt baffle 70 can adopt any shape of baffle structure, and the specific shape is not limited in the present application.

[0092] Referring to Figure 3 In some embodiments, the air inlet of the inner ring ejector pipe 40 and the air inlet of the outer ring ejector pipe 30 are both provided with an outwardly convex flange 71, the flange 71 is connected with the outer ring gas mixing disc 10, and the flanges 71 of the inner ring ejector pipe 40 and the outer ring ejector pipe 30 are connected as a whole, so that the total length of the flange 71 is greater than the outer ring radius of the outer ring gas mixing disc 10. The flange 71 is used as a shunt baffle 70, the coverage of the shunt baffle 70 is large, and it can effectively separate the primary air inlet area near the gas nozzle 201 from the inter-ring gap for secondary air inlet.

[0093] Embodiment 3:

[0094] Based on the same inventive concept, the embodiment of the present application provides an updraft burner 1100, which is a necessary component of the gas stove 1000. The ejector 100 and the nozzle 201 of the updraft burner 1100 are located above the panel 1300 of the gas stove 1000, and the primary air and the secondary air are introduced from the panel 1300, thus being "updraft". The updraft burner 1100 mainly comprises the ejector 100, the base bracket 200 and the fire cover. The base bracket 200 is mainly used for connecting the gas pipeline and spraying the gas to the ejector 100 through the nozzle 201. The fire cover is arranged on the mixing disc of the ejector 100, and a plurality of fire holes are arranged on the fire cover for burning the gas. The specific number of the fire cover is determined according to the number of rings of the updraft burner 1100. In general, the updraft burner 1100 with a double-ring structure is provided with inner and outer fire covers, and the updraft burner 1100 with a triple-ring structure is provided with inner, middle and outer fire covers. The number of the nozzles 201 on the base bracket 200 is determined according to the number of the gas inlets of the ejector pipe. In general, one nozzle 201 is arranged for each gas inlet.

[0095] Referring to Figure 7 and Figure 9 , the embodiment of the present application is an overall structure diagram and an explosion diagram of the updraft burner 1100. The updraft burner 1100 of the embodiment comprises the ejector 100, the base bracket 200 and the fire cover. The ejector 100 adopts the ejector 100 of the above-mentioned embodiment 2, and the specific structure is referred to the embodiment 2, which will not be described here again. Referring to Figure 8 , the base bracket 200 is provided with two or more nozzles 201. The ejector pipe with the inner partition plate 50 is provided with the same number of nozzles 201 as the number of the passage branches 34, and the nozzle 201 corresponds to the passage branch 34 one by one. The ejector pipe without the inner partition plate 50 only needs to be provided with one nozzle 201.

[0096] Based on the ejector 100 of the embodiment 1, the double-ring structure is adopted, and the corresponding fire cover is also provided with two, which are the inner ring fire cover 300 and the outer ring fire cover 400. In some embodiments, the inner ring fire cover 300 and the outer ring fire cover 400 are both annular. By arranging the inner and outer ring fire covers 400 as annular, the secondary air can enter, the secondary air entering condition of the center fire and the outer ring fire can be improved, and thus the combustion efficiency can be improved.

[0097] Based on the ejector 100 of the embodiment 1, the inner and outer rings are both single ejector pipes, the outer ring ejector pipe 30 is a multi-segment + multi-channel structure, and two inner partition plates 50 are arranged inside. Correspondingly, referring to Figure 8Correspondingly, three nozzles 201 are arranged on the base support 200, one nozzle 201 is arranged on the air inlet end a of the inner ring ejector pipe 40, and two nozzles 201 are arranged on the air inlet end a of the outer ring ejector pipe 30, and the two nozzles 201 correspond to the two channel branches 34 one by one, so as to realize multi-nozzle injection, increase the contact area of the high-speed fluid and the air, and more easily entrain the primary air, thereby improving the entraining capacity of the updraft combustion device 1100.

[0098] In order to facilitate the alignment of the ejector pipe and the nozzle 201, in some embodiments, a positioning groove 80 is arranged on the ejector 100, and a positioning block 202 is arranged at the corresponding position of the base support 200. When installed, the positioning block 202 is inserted into the positioning groove 80, so that each nozzle 201 is opposite to the corresponding position of the ejector pipe, facilitating installation. In addition, the positioning groove 80 and the positioning block 202 cooperate to prevent the ejector 100 and the base support 200 from rotating relative to each other and causing gas leakage.

[0099] Embodiment 4:

[0100] Based on the same inventive concept, the embodiment of the present application provides a gas stove 1000. Like the existing gas stove 1000, the gas stove 1000 of the embodiment mainly includes a panel 1300, a burner, a cookware support 1200 for placing a cookware, and other necessary accessories such as a thermocouple and an ignition needle. In the embodiment, the gas stove 1000 is specifically an updraft gas stove 1000, that is, the ejector 100 is located above the panel 1300, and the primary air and the secondary air both enter from above the panel 1300.

[0101] Referring to Figure 10 Unlike the prior art, the gas stove 1000 of the embodiment adopts the updraft burner 1100 of the above-mentioned embodiment 3, and the specific structure is referred to the embodiment 3, which will not be described here. Since the panel 1300, the support, the ignition needle and other accessories of the gas stove 1000 are not improved in the embodiment, the specific structures can be referred to the existing disclosure, and the other structures of the gas stove 1000 which are not described in detail can also be referred to the related disclosure of the prior art, and the specific content will not be described here.

[0102] The gas stove 1000 provided by the present application is provided with the updraft burner 1100 with the above-mentioned ejector 100. Based on the structural design of the ejector pipe in the ejector 100, the volume of the ejector pipe is smaller without affecting the entraining capacity of the ejector 100, and is more suitable for application in the limited space structure of the updraft burner 1100. The ejector pipe adopts the multi-nozzle 201 injection structure. By increasing the contact area of the high-speed fluid and the air, the primary air is more easily entrained, thereby improving the entraining capacity of the updraft burner 1100 and the combustion efficiency of the gas stove 1000.

[0103] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0104] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0105] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0106] In the present application, unless specifically defined and limited otherwise, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0107] In addition, the description involving "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0108] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the specification.

[0109] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0110] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An ejector, characterized in that: Applicable to an upward air inlet burner, the ejector comprises: A mixing plate is provided with a mixing cavity; the mixing plate includes an outer ring mixing plate and an inner ring mixing plate; the inner ring mixing plate and the outer ring mixing plate are both annular, and there is a gap between the inner ring mixing plate and the outer ring mixing plate, and the inner ring mixing plate has a central cavity, and the gap and the central cavity are respectively connected to the outside; An ejector pipe is located below the mixing disk and is connected to the mixing disk. Two ejector pipes are provided, namely an inner ring ejector pipe and an outer ring ejector pipe. The air inlet end of the inner ring ejector pipe and the air inlet end of the outer ring ejector pipe are located on the same side; the inner ring ejector pipe is communicated with the air mixing cavity of the inner ring mixing disk; the outer ring ejector pipe comprises: a first ejector pipe member having an air outlet end and an air inlet end for docking with a nozzle; and a second ejector pipe member having an air inlet end and an air outlet end for connecting to the mixing disk, the air outlet end of the second ejector pipe member being communicated with the air mixing cavity of the outer ring mixing disk; the first ejector pipe member and the second ejector pipe member are sequentially arranged along the air inlet direction, and the air outlet end of the first ejector pipe member and the air inlet end of the second ejector pipe member are axially spaced; The air inlet end of the inner ring ejector tube and the air inlet end of the outer ring ejector tube are both provided with a diverter baffle, and the diverter baffle separates the primary air intake area from the secondary air intake area; An outer baffle, the outer baffle separating the air intake area of ​​the inner ring ejector pipe from the air intake area of ​​the outer ring ejector pipe; the outer baffle, the diverter baffle and the outer ring gas mixing disk are all connected; Two inner partitions are respectively arranged in the first ejection pipe member and the second ejection pipe member of the outer ring ejection pipe along the air intake direction, so that two channel branches are formed inside the first ejection pipe member and the second ejection pipe member, and the two channel branch positions of the first ejection pipe member and the second ejection pipe member correspond one to one.

2. The ejector according to claim 1, wherein: The first ejection pipe and / or the second ejection pipe have a throat section with a cross-sectional area smaller than the air inlet end of the pipe.

3. The ejector according to claim 2, wherein: The first ejection pipe member and the second ejection pipe member both have the throat section, and the cross-sectional area of ​​the throat section of the first ejection pipe member is smaller than the cross-sectional area of ​​the throat section of the second ejection pipe member.

4. The ejector according to claim 2, wherein: The first ejector pipe member is composed of an air intake section for docking the nozzle and the throat section in sequence along the air intake direction; The second ejector pipe member is composed of an air intake section for connecting with the first ejector pipe member, the throat section and a transition section for connecting with the mixing plate in sequence along the air intake direction.

5. The ejector according to any one of claims 1 to 4, characterized in that: The length of the first ejection tube is smaller than the length of the second ejection tube.

6. The ejector according to any one of claims 1 to 4, characterized in that: The axial spacing is 6 to 12 mm.

7. The ejector according to claim 1, wherein: The air inlet of the inner ring ejector tube and the air inlet of the outer ring ejector tube are both provided with convex edges; the convex edges are connected to the outer ring mixing disk, and the total length of the convex edges is greater than the outer ring radius of the outer ring mixing disk, and the convex edges constitute the diversion baffle.

8. The ejector according to claim 7, wherein: The first ejection pipe and the second ejection pipe of the outer ring ejector pipe both have a throat section with a cross-sectional area smaller than the air inlet end. The inner baffle is arranged in the throat section, and one end of the inner baffle is flush with the air inlet end of the throat section.

9. The ejector according to claim 8, wherein: The throat section is a straight pipe section with a waist-shaped cross section; the inner partition is located on the central symmetric plane of the straight pipe section.

10. An upward air inlet burner, characterized in that: include: The ejector according to any one of claims 1 to 9; The base bracket is provided with two or more nozzles, and the air inlet end of the ejector tube provided with an inner partition is equipped with two or more nozzles, and the two or more nozzles correspond one-to-one to the two or more channel branches; The fire cover is arranged on the mixing plate of the ejector.

11. The upward air inlet burner according to claim 10, characterized in that: The fire cover comprises an outer ring fire cover and an inner ring fire cover, and both the outer ring fire cover and the inner ring fire cover are ring-shaped.

12. A gas stove, characterized in that: Including the up-air burner according to claim 10 or 11.

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