CN115899686A - Combustor draws and penetrates subassembly and uses this gas cooking utensils that draw and penetrate subassembly - Google Patents

Abstract

The invention relates to a burner injection component and a gas stove using the same, wherein the burner injection component comprises an injection pipe, a gas inlet end and a throat; the gas inlet seat is provided with a gas flow outlet, the gas flow outlet is opposite to the gas inlet end, and the gas flow outlet is positioned at the upstream of the gas inlet end in the gas flow direction; the injection assembly is horizontally installed, the intersection line of the horizontal plane where the center of the fuel gas outlet is located and the throat forms a central line, the shape enclosed by the contour line of the cross section of the throat is S1, the flow area of the part above the central line is S2, and the flow area of the part below the central line is S1 > S2. Compared with the prior art, the invention has the advantages that: the upper part with less gas and air provides a larger flow area, the gas flow of the gas and the air entering the mixing section is increased, and then the gas entering the mixing section is balanced by the gas flow of the upper part and the lower part, so that the mixing uniformity is promoted.

Description

Combustor draws and penetrates subassembly and uses this gas cooking utensils that draw and penetrate subassembly

Technical Field

The invention relates to the technical field of household kitchen utensils, in particular to a burner injection assembly and a gas stove with the same.

Background

At present, two types of gas burners are mainly used for kitchen utensils, wherein one type of gas burner is an injection type gas burner and generally comprises a fire cover, an injection pipe and a spray head, a first air inlet is formed in one end, corresponding to the spray head, of the injection pipe, the injection pipe is communicated with the external atmosphere through the first air inlet, gas is sprayed into the injection pipe from the spray head at a high speed to form strong injection in the injection pipe, the external air is sucked into the injection pipe from an air inlet, and the external air is mixed with the gas in the injection pipe and then is sent to the fire cover for combustion.

The advantages of this burner are: the structure is simple and compact, the primary air injection effect is good, but the defects exist, and the requirement on the air supply pressure of the fuel gas is high; and because the gas is sprayed out from the nozzle with smaller aperture, the jet flow enters the ejector pipe at a high speed, and partial air around the jet flow is sucked in an entrainment manner and enters the ejector pipe under the turbulent dispersion action of the jet flow. For the existing ejector pipe, such as the ejector pipe disclosed in the Chinese patent with the patent number ZL201420180488.6 (with the publication number CN 203784951U) or the Chinese patent with the patent number ZL201520363021.X (with the publication number CN 204717683U), the inner cavity of the ejector pipe sequentially comprises a contraction section, a mixing section and a pressure expansion section along the direction from the inlet to the outlet.

Because the ejector pipe is generally of a symmetrical structure (the upper side and the lower side of a horizontal plane where the center of the nozzle is located are symmetrical), when the burner works, the ambient temperature is higher due to the fact that air in a stove shell is heated, the temperature of the burner is obviously increased as the burner is closer to the high temperature, when the burner is at a high temperature, gas ejected by the nozzle is rapidly heated, the volume is rapidly increased, the density is reduced, the influence of buoyancy on the gas ejection direction cannot be ignored, the trajectory of the ejection is inclined upwards to a certain degree, so that the air ejection amount below the horizontal plane where the center of the nozzle is located is increased (the space for naturally ejecting air to enter is increased), and the air ejection amount above the plane where the center of the nozzle is located is reduced (the space for naturally ejecting air to enter is reduced); in addition, after the external air naturally injected is rapidly heated, the hot air tends to float upwards, and the air above the plane where the center of the nozzle is located is further reduced. From this, the gas that the nozzle erupted and the mixed gas that the inside injection pipe was entered into in the nature injection of outside air, the gas flow that exists and be located nozzle center place plane top is less than the little state of gas flow of nozzle center place plane below, will lead to mixing inhomogeneous, draws and penetrates efficiency and descend, leads to the burning insufficient even.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide the burner injection assembly aiming at the defects of the prior art, so that injection gas can be uniformly mixed, the injection efficiency is improved, and further, the combustion is sufficient.

The second technical problem to be solved by the invention is to provide a gas cooker with the burner injection assembly.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a burner injection component, which comprises

The injection pipe is provided with an air inlet end and a throat;

the gas inlet seat is provided with a gas flow outlet, the gas flow outlet is opposite to the gas inlet end, and the gas flow outlet is positioned at the upstream of the gas inlet end in the gas flow direction;

the method is characterized in that:

the injection assembly is horizontally installed, the intersection line of a horizontal plane where the center of the fuel gas outlet is located and the throat forms a central line, the shape enclosed by the contour line of the cross section of the throat is S1 in the part above the central line, S2 in the part below the central line, and S1 is larger than S2.

The area of overflowing through making the part that the laryngeal opening is located above the central line is greater than the area of overflowing through making the part that the laryngeal opening is located below the central line, the area of overflowing on upper portion has been enlarged, even there is the inhomogeneous problem of admitting air that gas come-up and air come-up arouses, also can make the gas with draw and penetrate the air and enter into in the ejector tube after, when reacing the laryngeal opening, provide great area of overflowing on the lower upper portion of gas and air less, increase the gas flow that gas and air enter into the mixing section, and then make the gas that gets into in the mixing section, for the plane at gas flow outlet center place, the gas flow of upper and lower two parts can reach the balance, thereby promote the homogeneity of mixing, improve and penetrate efficiency, and then make the burning abundant.

Preferably, in order to further ensure that the air intake of the upper part and the lower part is uniform, the value range of S1 to S2 is less than or equal to 1.45.

Further, in order to enlarge the flow area of the upper part, the contour line of the cross section of the throat opening is provided with at least one first convex part at the part above the central line, and the first convex part is in a shape of being convex upwards in the direction away from the central line.

In order to improve the gas injection capacity, the number of the gas flow outlets corresponding to the same injection pipe is at least two, and the centers of the gas flow outlets are on the same horizontal plane.

Furthermore, at least one second bulge is formed on the part, below the central line, of the contour line of the throat cross section, the second bulge is in a shape protruding upwards in the direction close to the central line, and the second bulge is formed at a position corresponding to the position between two adjacent gas outlet openings. Therefore, the influence caused by the increase of injected air due to the superposition of negative pressure regions formed by injecting fuel gas from two adjacent fuel gas stream outlets is reduced, and the uneven air inlet is reduced.

Furthermore, in order to facilitate the expansion of the flow area of the upper part and avoid the overlarge height of the injection pipes, the number of the gas outlets corresponding to the same injection pipe is two, the contour line of the cross section of the throat opening is provided with a first bulge part at the part above the central line, and the first bulge part is in a shape of bulging upwards in the direction far away from the central line;

the vertical distance from the highest point of the first convex part to the center line is D1, the vertical distance from the highest point of the second convex part to the center line is D2, and the following relation that D1: D2 ranges from 1.25.

Further, a vertical line passing through the center between two intersection points of the central line and the contour line is taken as an axis, the axis is perpendicular to the central line, and the parts of the contour line of the throat cross section on two sides of the axis are symmetrical relative to the axis, so that the air flow on the left side and the right side is uniform.

Furthermore, the contour line of the cross section of the throat opening is provided with at least one first bulge part at the part above the central line, and the first bulge part is in a shape of bulging upwards in the direction far away from the central line; and/or at least one second bulge is formed on the part of the contour line of the throat opening below the central line, and the second bulge is in a shape of bulging upwards in the direction close to the central line;

the ejector tube comprises a contraction section, a mixing section and a diffusion section which are sequentially arranged along the airflow direction, the throat is formed at the junction of the contraction section and the mixing section, a first transition structure corresponding to a first bulge part and/or a second bulge part of the throat is formed in the contraction section, and the first transition structure gradually bulges towards the throat from the air inlet end, so that airflow can be gradually guided to the bulge parts through the first transition structure, and airflow impact caused by sudden change of the flow channel is reduced.

Furthermore, the contour line of the cross section of the throat opening is provided with at least one first bulge part at the part above the central line, and the first bulge part is in a shape of bulging upwards in the direction far away from the central line; and/or at least one second bulge is formed on the part of the contour line of the throat cross section below the central line, and the second bulge is in a shape of bulging upwards in the direction close to the central line;

the ejector pipe comprises a contraction section, a mixing section and a diffusion section which are sequentially arranged along the airflow direction, the throat opening is formed at the junction of the contraction section and the mixing section, and a second transition structure corresponding to the first protruding part and/or the second protruding part of the throat opening is formed in the mixing section, so that the uniform mixing of the airflow can be further promoted in the mixing section.

The technical scheme adopted by the invention for solving the second technical problem is as follows: a gas cooker characterized in that: the gas cooker is provided with the burner injection assembly.

Compared with the prior art, the invention has the advantages that: the area of overflowing through making the part that the laryngeal opening is located above the central line is greater than the area of overflowing through making the part that the laryngeal opening is located below the central line, the area of overflowing on upper portion has been enlarged, even there is the inhomogeneous problem of admitting air that gas come-up and air come-up arouses, also can make the gas with draw and penetrate the air and enter into in the ejector tube after, when reacing the laryngeal opening, provide great area of overflowing on the lower upper portion of gas and air less, increase the gas flow that gas and air enter into the mixing section, and then make the gas that gets into in the mixing section, for the plane at gas flow outlet center place, the gas flow of upper and lower two parts can reach the balance, thereby promote the homogeneity of mixing, improve and penetrate efficiency, and then make the burning abundant.

Drawings

FIG. 1 is a schematic structural view of a burner injector assembly according to a first embodiment of the present invention;

FIG. 2 is a schematic illustration of an eductor tube of an eductor assembly for a burner according to a first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the throat of an eductor tube of a burner eductor assembly according to a first embodiment of the present invention;

FIG. 4 is a schematic view of an air inlet seat of a burner eductor assembly according to a first embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of the throat of an eductor tube of a burner eductor assembly according to a second embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of the throat of an eductor tube of a burner eductor assembly according to a third embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of the throat of an eductor tube of a eductor assembly for a burner according to a fourth embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to 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," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and simplicity in description, but do not indicate or imply that the devices or elements so referred to must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are illustrative only and are not to be construed as limiting since the disclosed embodiments of the invention can be positioned in different orientations, e.g., "upper" and "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example one

Referring to fig. 1 to 4, a first embodiment of the present invention is shown. The burner injection component of the embodiment comprises an injection pipe 1 and an air inlet seat 2.

The injection pipe 1 of this embodiment includes a contraction section 11, a mixing section 12 and a diffusion section 13 in sequence along the airflow direction according to the change of the cross section, wherein a throat 14 is formed at the junction of the contraction section 11 and the mixing section 12. The port of the contraction section 11 far away from the mixing section 12 is formed as an air inlet end 111, and a fuel gas outlet 21 is formed on the air inlet seat 1, and the fuel gas outlet 21 is opposite to the air inlet end 111. In the installed state, the gas outlet 21 and the injection pipe 1 are installed horizontally, the horizontal plane of the center of the gas outlet 21 divides the gas outlet 21 into two symmetrical upper and lower parts, and the horizontal straight line (center line X) in fig. 3 is the intersection line of the horizontal plane of the center of the gas outlet 21 and the throat 14 (plane).

The contour line of the cross section (the cross section formed by the left and right vertical sections in fig. 2) of the throat 14 (two contour lines are spaced from each other in the figure, because the ejector tube 1 has a certain wall thickness, the contour lines described below are all inner contour lines) has a shape surrounded by a portion above the center line X as the flow area S1, a portion below the center line X as the flow area S2, and S1 > S2. That is to say, the flow area of the part of the throat 14 located above the central line X is larger than the flow area of the part located below the central line X, so that for a symmetrical ejector pipe structure, the flow area of the upper part is enlarged, even if the problem of uneven air intake caused by floating of gas and air exists, the gas and the ejected air can be enabled to enter the ejector pipe 1 and then reach the throat 14 after entering the ejector pipe, a larger flow area is provided at the upper part with less gas and air, the gas flow of the gas and the air entering the mixing section 12 is increased, and further the gas entering the mixing section 12 is enabled to be balanced, and for the plane where the center of the gas outlet 21 is located, the gas flow of the upper part and the lower part can be balanced, so that the mixing uniformity is improved, and further the combustion is sufficient. Preferably, the range of S1 to S2 is ≦ 1.45.

In the present embodiment, in order to facilitate the formation of S1 > S2, the contour of the cross section of the throat 14 has at least one first convex portion 141 at a portion thereof located above the center line X, the first convex portion 141 being convex upward in a direction away from the center line X. Corresponding to each injection pipe 1, the number of the gas flow outlets 21 can be at least two, so that the problem that the external air of a single gas flow outlet 21 is insufficient in natural injection amount is solved. The centers of the gas outflow ports 21 are on the same horizontal plane, that is, the gas outflow ports 21 are arranged at intervals in the horizontal direction. In the present embodiment, the gas outflow port 21 has two.

When at least two gas flow outlets 21 are arranged, negative pressure areas formed by the two gas flow outlets 21 are overlapped in an area between the two gas flow outlets 21, therefore, at least one second bulge 142 is formed on the part, below the central line X, of the contour line of the cross section of the throat 14, the second bulge 142 is in a shape protruding upwards in the direction close to the central line X, and the second bulge 142 is formed at the position between the two corresponding adjacent gas flow outlets 21, so that the influence of increase of injected air caused by overlapping of the negative pressure areas is reduced, and uneven air intake is reduced.

The vertical distance from the highest point of the first convex part 141 to the central line X is D1, the vertical distance from the highest point of the second convex part 142 to the central line X is D2, and the following conditions are satisfied, namely D1: D2 ranges from 1.25 to 2.15.

Referring to fig. 3, in this embodiment, the contour line of the cross section of the throat 14 may be formed by intersecting a plurality of circles or ellipses (in this embodiment, two circles with equal radius are shown by dotted lines in fig. 3), two intersection points of the center line X and the contour line of the cross section of the throat 14 are two points where the two circles are away from each other, centers O1 and O2 of the two circles are located on the center line X, a portion located below the center line X is taken as a non-intersecting portion of the two circles and a chamfer is formed at the intersection point, the chamfer position is the second convex portion 142, points on each non-intersecting portion of the portion located above the center line X are formed by connecting arcs and line segments of the two circles located on both sides of the arcs, and the arcs connecting the two circles form the first convex portion 141. Preferably, the axis Y is taken as a vertical line passing through the centre line X at the centre between the two intersections with the outline of the cross-section of the throat 14, the portions of the outline of the cross-section of the throat 14 on either side of the axis Y being symmetrical with respect to the axis Y on which the intersection of the two circles lies.

The first transition structure 112 corresponding to the first convex portion 141 and the second convex portion 142 of the throat 14 is gradually formed in the convergent section 11 from the air inlet end 111 to the mixing section 12. A second transition structure 121 is formed in the mixing section 12 corresponding to the first and second lobes 141, 142 of the throat 14.

Example two

Referring to fig. 5, in the present embodiment, unlike the above-described embodiment, the second convex portion 142 may not be provided, and the contour line of the cross section of the throat 14 may be formed by connecting straight lines at one point on each non-intersecting portion of the circles located below the center line X and by line segments of two circles located on both sides of the arc line, as long as S1 > S2 is ensured.

EXAMPLE III

Referring to fig. 6, the difference between the first embodiment and the second embodiment is that the contour line of the cross section of the throat 14, which is located below the center line X, is formed by connecting upwardly convex arcs at each non-intersecting point of each circle and by rounding the line segments of the two circles located on both sides of the arc, as long as S1 > S2 is ensured.

Example four

Referring to fig. 7, in the present embodiment, the difference from the first embodiment is that the contour line of the cross section of the throat 14 has two second protrusions 142 arranged right and left, thereby being adaptable to the structure of three gas outflow ports 112, and alternatively, the second protrusions 142 may be provided more in this way.

Claims (11)

1. A burner injection component, which comprises

The injection pipe (1) is provided with an air inlet end (111) and a throat (14);

the gas inlet seat (2) is provided with a gas flow outlet (21), the gas flow outlet (21) is opposite to the gas inlet end (111), and the gas flow outlet (21) is positioned at the upstream of the gas inlet end (111) in the gas flow direction;

the method is characterized in that:

the injection assembly is horizontally arranged, the intersection line of a horizontal plane where the center of the fuel gas outlet (21) is located and the throat (14) forms a central line (X), the shape enclosed by the contour line of the cross section of the throat (14) is that the flow area of the part above the central line (X) is S1, the flow area of the part below the central line (X) is S2, and S1 is larger than S2.

2. The burner injection assembly of claim 1 wherein the range of S1 to S2 is no greater than 1.45.

3. The burner injector assembly of claim 1, wherein: the contour line of the cross section of the throat (14) is provided with at least one first bulge (141) at a part above the central line (X), and the first bulge (141) is in a shape of bulging upwards in a direction far away from the central line (X).

4. The burner injector assembly of claim 1, wherein: at least one second bulge (142) is formed on the part, located below the center line (X), of the contour line of the cross section of the throat (14), and the second bulge (142) is in a shape protruding upwards in the direction close to the center line (X).

5. The burner injector assembly of claim 1, wherein: the number of the gas flow outlets (21) corresponding to the same injection pipe (1) is at least two, and the centers of the gas flow outlets (21) are on the same horizontal plane.

6. The burner injector assembly of claim 5, wherein: at least one second bulge (142) is formed on the part, below the central line (X), of the contour line of the cross section of the throat (14), the second bulge (142) is in a shape protruding upwards in the direction close to the central line (X), and the second bulge (142) is formed at the position between two adjacent gas flow outlets (21).

7. The burner injector assembly of claim 6, wherein: the number of the gas flow outlets (21) corresponding to the same injection pipe (1) is two, the contour line of the cross section of the throat (14) is provided with a first bulge (141) at a part above a central line (X), and the first bulge (141) is in a shape of bulging upwards in a direction far away from the central line (X);

the vertical distance from the highest point of the first convex part (141) to the central line (X) is D1, the vertical distance from the highest point of the second convex part (142) to the central line (X) is D2, and the following conditions are satisfied, wherein D1: D2 is in the range of 1.25.

8. The burner injector assembly of claim 1, wherein: and a vertical line passing through the center between two intersection points of the central line (X) and the contour line is taken as an axis (Y), the axis (Y) is vertical to the central line (X), and the parts of the contour line of the cross section of the throat opening (14) positioned at two sides of the axis (Y) are symmetrical relative to the axis (Y).

9. The burner injector assembly of claim 1, wherein: the contour line of the cross section of the throat (14) is provided with at least one first bulge (141) at a part above the central line (X), and the first bulge (141) is in a shape of bulging upwards in the direction far away from the central line (X); and/or at least one second bulge (142) is formed on the part of the contour line of the cross section of the throat (14) below the central line (X), and the second bulge (142) is in a shape of bulging upwards in the direction close to the central line (X);

the ejector tube (1) comprises a contraction section (11), a mixing section (12) and a diffusion section (13) which are sequentially arranged along the airflow direction, a throat opening (14) is formed at the junction of the contraction section (11) and the mixing section (12), a first transition structure (112) corresponding to a first bulge portion (141) and/or a second bulge portion (142) of the throat opening (14) is formed in the contraction section (11), and the first transition structure (112) gradually bulges towards the throat opening (14) from an air inlet end (111).

10. The burner injector assembly of claim 1, wherein: the contour line of the cross section of the throat (14) is provided with at least one first bulge (141) at a part above the central line (X), and the first bulge (141) is in a shape of bulging upwards in the direction far away from the central line (X); and/or at least one second bulge (142) is formed on the part of the contour line of the throat (14) below the central line (X), and the second bulge (142) is in a shape which is convex upwards in the direction close to the central line (X);

the ejector tube (1) comprises a contraction section (11), a mixing section (12) and a diffusion section (13) which are sequentially arranged along the airflow direction, the throat opening (14) is formed at the junction of the contraction section (11) and the mixing section (12), and a second transition structure (121) corresponding to a first protruding part (141) and/or a second protruding part (142) of the throat opening (14) is formed in the mixing section (12).

11. A gas cooking appliance is characterized in that: gas cooking appliance applying the burner injection assembly according to any one of claims 1 to 10.

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