CN219656073U - Gas nozzle seat, ejector and combustor - Google Patents

Abstract

The utility model provides a gas nozzle seat, an ejector and a combustor. The gas nozzle seat comprises an injection pipe mounting plate, wherein a through hole is formed in the injection pipe mounting plate; the nozzle mounting part is provided with a fuel gas circulation channel, and is spaced from the side wall of the through hole to form an annular space; the plurality of air guide strips are arranged in the annular space, each of the plurality of air guide strips is provided with a first side face and a second side face, the first side face and the second side face of one of the two adjacent air guide strips and the outer side wall of the nozzle mounting part are surrounded together with the side wall of the through hole to form an air circulation channel, the first side face and/or the second side face of at least one air guide strip are obliquely arranged relative to a lateral plane perpendicular to the axis of the through hole, the lateral plane is closer to the inside of the gas nozzle seat, and the intersecting line of the first side face and/or the second side face of at least one air guide strip and the lateral plane is offset towards the circumferential direction of the through hole. Thus, the fuel gas and the air are mixed more fully, and the combustion efficiency is higher.

Description

Gas nozzle seat, ejector and combustor

Technical Field

The utility model relates to the technical field of cooking appliances, in particular to a gas nozzle seat, an ejector and a combustor.

Background

The burners on the market are usually atmospheric burners, which require a premixing process with air before the gas enters the burner head of the burner.

Typically, the burner is connected to an injector, and the premixing of air and gas takes place in the injector. The gas inlet and the air inlet that is located the gas inlet outside have been seted up to the inlet end of ejector, and high-speed gas gets into in the injection pipe, causes the entrainment effect to the air around. Under the entrainment effect, air enters the ejector through the air inlet and is mixed with fuel gas.

However, the ejector has poor mixing effect of air and fuel gas in the ejector, so that the combustion efficiency of the combustor is poor and the energy efficiency is low.

Disclosure of Invention

In order to at least partially solve the problems of the prior art, according to one aspect of the present utility model, a gas nozzle holder is provided. The gas nozzle seat comprises an injection pipe mounting plate, wherein a through hole is formed in the injection pipe mounting plate; the nozzle installation part is provided with a fuel gas circulation channel, is arranged in the through hole and is spaced from the side wall of the through hole to form an annular space; and a plurality of air guide strips arranged in the annular space and arranged at intervals around the nozzle mounting part, wherein the inner ends of the plurality of air guide strips are fixed to the outer side wall of the nozzle mounting part, the outer ends of the plurality of air guide strips are fixed to the side wall of the through hole, each of the plurality of air guide strips is provided with a first side surface and a second side surface which are opposite to each other, the first side surface and the second side surface of one air guide strip and the second side surface of the other air guide strip of any two adjacent air guide strips are combined with the outer side wall of the nozzle mounting part and the side wall of the through hole together to form an air circulation channel, the first side surface and/or the second side surface of at least one air guide strip are inclined relative to a lateral plane perpendicular to the axis of the through hole, and the lateral plane perpendicular to the axis of the through hole is closer to the inside of the gas nozzle seat, and the intersecting line of the first side surface and/or the second side surface of the at least one air guide strip and the lateral plane is offset towards the circumferential direction of the through hole.

When the gas nozzle seat is used, high-speed gas flow enters the injection pipe through the gas flow channel, and the gas nozzle seat has entrainment effect on surrounding air, so that the air enters the injection pipe through the air flow channel. When air flows through the air circulation channel, under the guiding action of the first side face and/or the second side face of the air guide strip, the air can enter the injection pipe at a certain inclination angle. Like this, the air that has inclination forms certain whirl, and the whirl can make the gas in the injection pipe more abundant with the mixing of air, improves combustion efficiency. And because the first side surface and/or the second side surface are/is arranged obliquely relative to the lateral plane, the contact area between the side surface and the air is larger, namely the air guiding effect is better, the mixing degree of the fuel gas and the air in the injection pipe is further improved, and the combustion efficiency of the burner provided with the fuel gas nozzle seat is better and the energy efficiency is higher.

Illustratively, a first intersection of the first side of each wind-guiding strip with the lateral plane and/or a second intersection of the second side of each wind-guiding strip with the lateral plane is curved or inclined towards the circumferential direction. The length of the air guide strip in the radial direction of the through hole is increased, the surface area of the air guide strip is further increased, the contact area of air and the air guide strip is larger, the air guide effect is better, and the mixing effect between the air and the fuel gas is improved.

The circumferential direction includes a first circumferential direction and a second circumferential direction opposite to each other, the first side of each wind guiding strip faces the first circumferential direction, the second side of each wind guiding strip faces the second circumferential direction, the first intersecting line is curved or inclined toward the first circumferential direction, and the closer the lateral plane is to the inside of the gas nozzle holder, the first intersecting line is offset toward the first circumferential direction. Thus, when air flows into the air circulation channel, the air flows more smoothly, and the influence on the circulation rate caused by vortex formation in the air circulation channel is avoided.

Illustratively, the second intersection of the different lateral planes with the second side is aligned with each other along the axial direction of the through hole. In this way, during production, the gas nozzle holder can be demoulded in a direction parallel to the axial direction of the through-hole. In the direction parallel with the axial direction of through-hole, can not cause the hindrance to the removal of counterparty between mould and the gas nozzle holder, be convenient for the drawing of patterns of gas nozzle holder promptly, the production degree of difficulty and manufacturing cost are lower.

The second intersection line is, for example, offset in the second circumferential direction the closer the lateral plane is to the interior of the gas nozzle seat. Thus, when air flows into the air circulation channel, the air flows more smoothly, and the influence on the circulation rate caused by vortex formation in the air circulation channel is avoided.

The maximum offset of the second intersection line in the second circumferential direction is smaller than the maximum offset of the first intersection line in the first circumferential direction. In this way, the two sides are different in the degree of guiding the air flowing through, and the mixing effect between the air and the fuel gas is further improved.

The first side surface and the outer side wall of the nozzle mounting portion have an inner end intersecting line, the inner end intersecting line and the axis of the through hole have a first included angle, the first side surface and the side wall of the through hole have an outer end intersecting line, the outer end intersecting line and the axis of the through hole have a second included angle, and the second included angle is larger than or equal to the first included angle. In this way, the first side is more fully contacted with the air flowing through, and the guiding function can be better achieved.

Illustratively, the first side and the second side of each of the plurality of air guide bars are parallel to one another. The arrangement parallel to each other can reduce the space occupied by a plurality of air guide strips in the air circulation channel as much as possible, and the air inlet efficiency is higher.

Illustratively, there is a gap between projections in any adjacent two lateral planes of the plurality of wind-guiding strips. This allows a portion of the air to pass directly through the gap into the ejector tube. Therefore, on the basis that part of air is guided by a plurality of air guide strips, part of air can directly enter the injection pipe through the gap, and the air inlet efficiency is higher.

Illustratively, projections of inner ends of any adjacent two of the plurality of wind-guiding strips in the lateral plane are spaced apart from each other. Therefore, on the basis of not changing the size of the through hole, the area of the air circulation channel is further increased, and the air inlet efficiency is improved.

Illustratively, the projected area of the plurality of air guide strips on the lateral plane is M1, and the projected area of the area between the side wall of the through hole and the outer side wall of the nozzle mounting portion on the lateral plane is M2, M1/M2 being smaller than a predetermined value. It will be appreciated that M1/M2 is the ratio of the area, which represents the ratio of the amount of air entering the air flow channel that needs to flow through the air guide strip to the total amount of ventilation air. Under the condition that the total circulating air quantity is unchanged, through reasonable setting of the preset value, the gas nozzle seat can have good air inlet efficiency and air guiding effect.

The number of wind guide strips is 5, for example. Therefore, on one hand, the stable connection between the nozzle mounting part and the through hole can be ensured, and on the other hand, the influence on the air inlet efficiency of the air circulation channel caused by excessive air guide strips can be avoided.

Illustratively, the gaps between any adjacent two of the plurality of air guide strips are the same. Therefore, the air quantity flowing in from the gaps is closer, so that the air entering the injection pipe is more uniform, and the mixing effect is better.

According to another aspect of the utility model, there is also provided an ejector comprising an ejector tube and any one of the above gas nozzle holders, the gas nozzle holder being disposed on the inlet of the ejector tube, the ejector tube being coaxial with the gas flow passage. Like this, the air is through the air flow channel of gas nozzle holder, and in entering the ejector with the gas in the gas flow channel with certain inclination, it is more abundant to mix, can promote the combustion efficiency in the follow-up combustion process effectively.

The injector further illustratively includes a nozzle mounted to the gas nozzle mount, the nozzle threadably coupled to the nozzle mount. The nozzle in threaded connection only needs to be inserted into the nozzle mounting part, and the nozzle can be mounted by screwing, so that the process is simple and convenient.

According to a further aspect of the utility model there is also provided a burner comprising a burner head and any of the ejectors described above, the ejector tube having an air outlet communicating with the burner head. Thus, more sufficient fuel gas and air mixed in the injection pipe enter the combustion head, so that the combustion efficiency is higher and the energy efficiency is higher.

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Advantages and features of the utility model are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

FIG. 1 is a perspective view of a burner according to an exemplary embodiment of the present utility model;

FIG. 2 is a cross-sectional view of an ejector according to one exemplary embodiment of the present utility model;

FIG. 3 is a perspective view of a burner according to an exemplary embodiment of the present utility model;

FIG. 4 is a perspective view of a burner according to another exemplary embodiment of the present utility model; and

fig. 5 is a front view of a burner according to an exemplary embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

100. a gas nozzle holder; 110. an ejector tube mounting plate; 111. a through hole; 120. a nozzle mounting portion; 121. an outer sidewall of the nozzle mounting portion; 130. an air guiding strip; 131. an inner end; 132. an outer end; 133. a first side; 134. a second side; 140. a gas flow channel; 150. an air circulation channel; 200. an ejector tube; 300. and (3) a nozzle.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the utility model. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the utility model by way of example only and that the utility model may be practiced without one or more of these details. Furthermore, some technical features that are known in the art have not been described in detail in order to avoid obscuring the utility model.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present utility model. It will be apparent that embodiments of the utility model may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

The embodiment of the utility model provides a gas nozzle seat. Referring to fig. 1, a gas nozzle holder 100 may be installed at the gas inlet of the injection pipe 200, and a nozzle 300 is installed on the gas nozzle holder 100. Referring to fig. 3 and 4 in combination, the gas nozzle holder 100 may include an ejector tube mounting plate 110, and the ejector tube mounting plate 110 may be provided with a through hole 111. The inside of the through hole 111 may be provided with a nozzle mounting portion 120, and the nozzle mounting portion 120 may be provided with a gas flow passage 140. The nozzle mounting portion 120 may be used for mounting the nozzle 300, and the fuel gas in the nozzle 300 flows into the injection pipe through the fuel gas flow passage 140. The cross-sections of the through-hole 111 and the nozzle mount 120 are generally provided in a circular shape. Of course, in some embodiments, the through-holes and nozzle mounts may be provided in other shapes. The nozzle mount 120 may be spaced apart from the sidewall of the through hole 111 to form an annular space. The annular space may allow the interior space of the ejector 200 to communicate with the external environment. The gas nozzle holder 100 further includes a plurality of air guide strips 130, the plurality of air guide strips 130 may be disposed in the annular space and spaced around the nozzle mounting portion 120, inner ends 131 of the plurality of air guide strips 130 are fixed to an outer sidewall of the nozzle mounting portion 120, and outer ends 132 of the plurality of air guide strips 130 are fixed to sidewalls of the through holes 111. Wherein each of the plurality of air guide strips 130 may have a first side 133 and a second side 134 facing away from each other. The first side 133 of one of the two air guide bars 130 and the second side 134 of the other air guide bar 130 of any adjacent two air guide bars 130 may be surrounded with the outer side wall 121 of the nozzle mounting portion and the side wall of the through hole 111 to form the air circulation channel 150. The first side 133 and/or the second side 134 of the at least one wind-guiding strip 130 are arranged obliquely with respect to a lateral plane perpendicular to the axis of the through-hole 111. The closer the lateral plane perpendicular to the axis of the through hole 111 is to the inside of the gas nozzle holder 100, the more the intersection line of the first side face 133 and/or the second side face 134 of the at least one air guide strip 130 and the lateral plane is offset toward the circumferential direction of the through hole 111. Referring to fig. 1, 3 and 5 in combination, where the axis of the through hole 111 is O-O ', there may be a plurality of lateral planes along a direction perpendicular to the axis O-O ', and P-P ' in fig. 1 is an image of one of the lateral planes at the viewing angle. The side plane is also understood to be the plane parallel to the plane of the paper in the view of fig. 5. The lateral planes are parallel to each other, and some of them overlap the structure of the wind guide strip 130. Accordingly, the first side 133 and the second side 134 of the wind guiding strip 130 also have overlapping lateral planes, and the overlapping of the first side 133 and the second side 134 with the lateral planes is a line, i.e. the intersection line. The circumferential direction may be any one of the first circumferential direction A-A 'and the second circumferential direction B-B'. The closer to the inside of the gas nozzle holder 100, the intersection line is offset toward the circumferential direction. Taking one of the plurality of air guiding strips 130' in fig. 3 as an example, the first side surface of the air guiding strip 130' is 133'. The intersection line of the first side surface 133 'and the lateral plane is offset in the first circumferential direction A-A' as approaching the inside of the gas nozzle holder. So that the structure of the first side 133' is "twisted" in the first circumferential direction A-A ' in the direction of the axial direction O-O '. In this way, the air flowing through the first side 133 'has a torsional guiding effect towards the first circumferential direction A-A'. That is, the first side surface 133', the second side surface 134 "of the air guide strip 130" adjacent to the air guide strip 130', the outer side wall 121 of the nozzle mounting portion, and the side wall of the through hole 111 enclose the formed air circulation channel 150. At least one of the air flow channels 150 has a torsional guiding effect towards the first circumferential direction A-A' facing the air flowing therethrough. It will be appreciated that the above examples are given by taking the case that the intersecting line is offset towards the first circumferential direction A-A ', and the intersecting line may also be offset towards the second circumferential direction B-B', and the guiding principles thereof are the same and will not be described herein. In the case where the intersection line of the first side surface 133 and the lateral plane and the intersection line of the second side surface 134 and the lateral plane are both offset, the directions of the intersection line of the two may be the same or different, which is not limited in the present utility model.

In use, the gas nozzle holder 100 of the present utility model provides a high velocity gas flow through the gas flow channel 140 into the ejector tube 200, which entrains ambient air and causes the air to enter the ejector tube 200 through the air flow channel 150. When air flows through the air flow channel 150, the air enters the ejector 200 at an inclined angle under the guiding action of the first side 133 and/or the second side 134 of the air guiding strip 130. Thus, the air with the inclined angle forms a certain rotational flow, and the rotational flow can enable the fuel gas in the injection pipe 200 to be mixed with the air more fully, so that the combustion efficiency is improved. In addition, since the first side surface 133 and/or the second side surface 134 are/is inclined with respect to the lateral plane, the contact area between the side surface and the air is larger, that is, the air guiding effect is better, the mixing degree of the fuel gas and the air in the injection pipe 200 is further improved, and the combustion efficiency of the burner provided with the fuel gas nozzle seat 100 is better and the energy efficiency is higher.

For example, the first intersection of the first side 133 of each wind-guiding strip 130 with the lateral plane and/or the second intersection of the second side 134 of each wind-guiding strip 130 with the lateral plane may be curved or inclined towards the circumferential direction. Referring to fig. 5, an embodiment in which the first intersecting line and the second intersecting line are both inclined toward the circumferential direction is exemplified, wherein straight lines C1-C2 are straight lines passing through the center of the through hole 111 and the inner end 131, and C1-C3 are straight lines passing through the inner end 131 and along the extending direction of the wind guiding strip 130 (which may be understood as the first intersecting line or the second intersecting line). The first intersecting line of the first side surface 133 of the plurality of air guiding strips 130 and the lateral plane is inclined towards the circumferential direction, which can be understood as the direction of the straight line C1-C3 after the straight line C1-C2 is inclined towards the first circumferential direction A-A'. The bending or tilting may be understood as different shapes of the plurality of air guiding strips 130, and in the embodiment of fig. 3, the plurality of air guiding strips 130 are bent, and in the embodiment of fig. 4, the plurality of air guiding strips 130 are tilted. By the arrangement, the length of the air guide strip 130 in the radial direction of the through hole 111 is increased, the surface area of the air guide strip 130 is further increased, the contact area of air and the air guide strip 130 is larger, the air guide effect is better, and the mixing effect between the air and the fuel gas is improved. In an embodiment not shown, the first intersection line of the first side surface of each wind guiding strip and the lateral plane and/or the second intersection line of the second side surface of each wind guiding strip and the lateral plane may pass through the center of the through hole.

For example, referring to fig. 3 and 4, the circumferential direction may include opposite first and second circumferential directions A-A 'and B-B'. The first side 133 of each wind-guiding strip 130 faces the first circumferential direction A-A'. The second side 134 of each wind-guiding strip 130 faces a second circumferential direction B-B'. The first intersection line is curved or inclined toward the first circumferential direction A-A ', and the closer the lateral plane is to the inside of the gas nozzle holder 100, the more the first intersection line is offset toward the first circumferential direction A-A'. Thus, when air flows into the air flow channel 150, the air flows more smoothly, and the influence of vortex formation in the air flow channel on the flow rate is avoided. In an embodiment not shown, the first intersection line is curved or inclined towards the first circumferential direction, the closer the lateral plane is to the interior of the gas nozzle seat, the more the first intersection line is offset towards the second circumferential direction.

Illustratively, the second intersection of the different lateral planes with the second side 134 may be aligned with each other along the axial direction of the through bore 111. In an embodiment in which the second side surfaces 134 of the plurality of wind guide strips 130 are inclined toward the circumferential direction, the second side surfaces 134 are parallel to the axial direction O-O' of the through hole 111. In embodiments in which the second sides 134 of the plurality of air guide strips 130 are curved toward the circumferential direction, the plurality of second intersecting lines overlap along the axial direction O-O'. In this way, during production, the gas nozzle holder 100 can be demolded in a direction parallel to the axial direction of the through hole 111. In the direction parallel to the axial direction of the through hole 111, the movement of the other side is not hindered between the mold and the gas nozzle holder 100, that is, the demolding of the gas nozzle holder 100 is facilitated, and the production difficulty and the production cost are lower.

Illustratively, the closer the lateral plane is to the interior of the gas nozzle holder 100, the more the second intersection line is offset toward the second circumferential direction. Thus, when air flows into the air flow channel 150, the air flows more smoothly, and the influence of vortex formation in the air flow channel 150 on the flow rate is avoided. In an embodiment not shown, the closer the lateral plane is to the interior of the gas nozzle seat, the more the second intersection line is offset towards the first circumferential direction.

For example, the maximum offset of the second intersection towards the second circumferential direction B-B 'may be smaller than the maximum offset of the first intersection towards the first circumferential direction A-A'. The degree of "twist" of the two sides of the air guide bar 130 is different. In this way, the two sides are different in the degree of guiding the air flowing through, and the mixing effect between the air and the fuel gas is further improved. In other embodiments, the maximum offset of the second intersection toward the second circumferential direction may be equal to the maximum offset of the first intersection toward the first circumferential direction.

Illustratively, the first side 133 has an inner intersection with the outer sidewall 121 of the nozzle mount 120. The inner intersection line may have a first angle with the axis O-O' of the through hole 111. The first side 133 and the sidewall of the through hole 111 may have outer end intersections. The outer intersecting line has a second angle with the axis of the through hole 111, and the second angle may be greater than or equal to the first angle. That is, the inner and outer intersecting lines O-O' may be parallel, and the inner and outer ends 131 and 132 of the first side 133 may twist to the same degree. Alternatively, the inner end 131 of the first side 133 is twisted to a lesser extent than the outer end 132 of the first side 133. In this way, the first side 133 is more fully in contact with the air flowing therethrough, and better guiding action is achieved.

3-5, the first side 133 and the second side 134 of each of the plurality of air guide strips 130 may be parallel to one another. The first side 133 and the second side 134 may be flat or curved. The parallel arrangement can minimize the space occupied by the plurality of air guide strips 130 in the air circulation channel 150, and the air inlet efficiency is higher. In an embodiment not shown, the first side surface and the second side surface may be at an angle, for example, the first side surface may be parallel to the axis of the through hole, and the second side surface may be disposed obliquely to the axis, and in the axial direction, the cross section of the wind guiding strip gradually increases or gradually decreases.

Illustratively, referring to FIG. 5, any adjacent two of the plurality of wind-guiding strips 130 have a gap between projections in the lateral plane. This allows a portion of the air to pass directly through the gap into the ejector tube. Thus, on the basis that part of air is guided by the plurality of air guiding strips 130, part of air can directly enter the injection pipe through the gap, and the air inlet efficiency is higher. In an embodiment not shown, the projections of two adjacent wind guiding strips in the lateral plane are completely overlapped, and all the air entering the air circulation channel passes through the wind guiding strips and enters the injection pipe.

Illustratively, with continued reference to FIG. 5, the projections of the inner ends 131 of any adjacent two of the plurality of wind-guiding strips 130 in the lateral plane are spaced apart from each other. In the lateral plane, on the gap between the through hole 111 and the nozzle mounting portion 120, the air can directly pass through everywhere in the radial direction thereof without the air guiding effect of the air guiding strip 130. Thus, the area of the air flow channel 150 is further increased without changing the size of the through hole 111, and the air intake efficiency is improved. In an embodiment not shown, projections of inner ends of adjacent two of the plurality of wind guide strips in the lateral plane may have a partial overlap.

Illustratively, the projected area of the plurality of air guide strips 130 on the lateral plane is M1, and the projected area of the region between the sidewall of the through hole 111 and the outer sidewall of the nozzle mount 120 on the lateral plane is M2, M1/M2 being smaller than a predetermined value. The value of M1/M2 may be set according to different usage conditions (such as gas pressure of the gas, size of the nozzle, size of the through hole, etc.). It will be appreciated that M1/M2 is the ratio of the area, which represents the ratio of the amount of air entering the air flow channel 150 that needs to flow through the air guide strip 130 to the total amount of ventilation air. Under the condition that the total circulating air quantity is unchanged, through reasonable setting of the preset value, the gas nozzle seat 100 can have good air inlet efficiency and air guiding effect.

Illustratively, the included angle is greater than 0 ° and less than or equal to 60 °. The specific size of the included angle can be set according to actual conditions. For example 5 °, 25 °, 45 ° or 60 °. As the angle approaches 0 °, the angle between the air flow channel 150 and the gas flow channel 149 is small, and the degree of mixing between the air and the gas is poor. Accordingly, the increased included angle may increase the mixing degree between the air and the gas, but inevitably affects the air intake efficiency of the air flow channel 150. The arrangement of the included angle greater than 0 ° and less than or equal to 60 ° can better balance the mixing degree of air and gas and the air intake efficiency of the air circulation channel 150. Of course, the included angle may be set to other values according to actual use.

Illustratively, the number of wind-guiding strips 130 may be 5. In this way, on the one hand, a stable connection between the nozzle mounting portion 120 and the through hole 111 can be ensured, and on the other hand, the air inlet efficiency of the air circulation channel 150 can be prevented from being affected by the excessive air guiding strips 130. Of course, in other embodiments, the number of the air guiding strips may be set according to the use requirement, for example, when the through holes are larger, the number of the air guiding strips may be correspondingly increased.

Illustratively, the gaps between any adjacent two of the plurality of air guide strips 130 are the same. Thus, the air flowing in from the plurality of gaps is more similar, so that the air entering the ejector tube 200 is more uniform, and the mixing effect is better.

According to another aspect of the present utility model, there is also provided an ejector. Referring to fig. 1 and 2, the eductor may include an eductor tube 200 and any of the gas nozzle holders described above. The gas nozzle holder 100 may be disposed on the gas inlet of the injection pipe 200, and the injection pipe 200 may be coaxial with the gas flow channel 140. Thus, air passes through the air flow channel 150 of the gas nozzle seat 100, and enters the ejector from the gas flow channel 140 at a certain inclination angle, so that the air is more fully mixed, and the combustion efficiency in the subsequent combustion process can be effectively improved.

Referring to fig. 1 and 2, the eductor may also include a nozzle 300 mounted to the gas nozzle holder 100, the nozzle 300 threadably coupled to the nozzle mount 120. Specifically, one end of the nozzle 300 may be connected with a gas pipe, and the other end is inserted into and connected to the nozzle mounting part 120. The nozzle 300 of the screw connection 120 can be installed by only inserting the nozzle 300 into the nozzle installation part 120 and screwing, and the process is simple and convenient. In embodiments not shown, the nozzle may be connected to the nozzle mount in other ways, such as by snap-fit, bayonet-fitting, etc.

According to yet another aspect of the present utility model, there is also provided a burner. The burner comprises a combustion head 400 and any one of the ejectors, and the air outlet of the ejector pipe 200 is communicated with the combustion head 400. Thus, the more fully mixed gas and air in the injector tube 200 enters the burner head 400 with higher combustion efficiency and higher energy efficiency. The burner may have one or more ejectors, each of which may have a respective gas flow passage and air flow passage.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", and "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, without limiting the scope of protection of the present utility model; the orientation terms "inner" and "outer" refer to the inner and outer relative to the outline of the components themselves.

For ease of description, regional relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein to describe regional positional relationships of one or more components or features to other components or features illustrated in the figures. It will be understood that the relative terms of regions include not only the orientation of the components illustrated in the figures, but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (15)

1. A gas nozzle holder, comprising:

the injection pipe mounting plate is provided with a through hole;

a nozzle mounting portion having a gas flow passage provided thereon, the nozzle mounting portion being disposed within the through-hole and spaced apart from a sidewall of the through-hole to form an annular space; and

a plurality of air guide strips arranged in the annular space and arranged at intervals around the nozzle mounting part, wherein the inner ends of the air guide strips are fixed to the outer side wall of the nozzle mounting part, the outer ends of the air guide strips are fixed to the side wall of the through hole,

wherein each of the plurality of air guide strips has a first side face and a second side face which are opposite to each other, the first side face of one air guide strip and the second side face of the other air guide strip of any adjacent two air guide strips and the outer side wall of the nozzle mounting part and the side wall of the through hole form an air circulation channel together, the first side face and/or the second side face of at least one air guide strip are obliquely arranged relative to a lateral plane perpendicular to the axis of the through hole,

the closer the lateral plane perpendicular to the axis of the through hole is to the inside of the gas nozzle seat, the more the intersection line of the first side surface and/or the second side surface of at least one wind guide strip and the lateral plane is offset towards the circumferential direction of the through hole.

2. The gas nozzle holder of claim 1, wherein a first intersection of a first side of each of the wind-guiding strips with the lateral plane and/or a second intersection of a second side of each of the wind-guiding strips with the lateral plane is curved or inclined towards the circumferential direction.

3. The gas nozzle holder of claim 2, wherein said circumferential direction comprises first and second opposite circumferential directions, a first side of each of said air guide strips facing said first circumferential direction and a second side of each of said air guide strips facing said second circumferential direction,

the first intersection line is curved or inclined toward the first circumferential direction, and the closer the lateral plane is to the inside of the gas nozzle holder, the more the first intersection line is offset toward the first circumferential direction.

4. A gas nozzle holder according to claim 3, wherein the second intersection of the different lateral planes with the second side face is aligned with each other in the axial direction of the through hole.

5. A gas nozzle holder according to claim 3, wherein the second intersection is offset towards the second circumferential direction the closer the lateral plane is to the interior of the gas nozzle holder.

6. The gas nozzle holder of claim 5, wherein a maximum offset of the second intersection toward the second circumferential direction is less than a maximum offset of the first intersection toward the first circumferential direction.

7. A gas nozzle holder as claimed in claim 3, wherein the first side surface has an inner end intersection with an outer sidewall of the nozzle mounting portion, the inner end intersection has a first angle with an axis of the through hole, the first side surface has an outer end intersection with a sidewall of the through hole, the outer end intersection has a second angle with the axis of the through hole, the second angle being greater than or equal to the first angle.

8. The gas nozzle holder of claim 1, wherein the first side and the second side of each of the plurality of air guide strips are parallel to each other.

9. The gas nozzle holder of any one of claims 1-8 wherein any adjacent two of said plurality of air guide strips have a gap between projections in said lateral plane.

10. The gas nozzle holder of claim 9 wherein projections of inner ends of any adjacent two of said plurality of air guide strips into said lateral plane are spaced apart from each other.

11. The gas nozzle holder according to claim 1, wherein an area of projection of the plurality of air guide strips on the lateral plane is M1, an area of projection of a region between a side wall of the through hole and an outer side wall of the nozzle mounting portion on the lateral plane is M2, and M1/M2 is smaller than a predetermined value.

12. The gas nozzle holder of claim 1, wherein,

the number of the air guide strips is 5; and/or

The gaps between any two adjacent wind guide strips are the same.

13. An ejector comprising an ejector tube and a gas nozzle holder according to any one of claims 1 to 12, the gas nozzle holder being disposed on the inlet of the ejector tube, the ejector tube being coaxial with the gas flow path.

14. The eductor of claim 13 further comprising a nozzle mounted to the gas nozzle seat, the nozzle threadably connected to the nozzle mount.

15. A burner comprising a burner head and an ejector according to claim 13 or 14, the ejector outlet communicating with the burner head.