A burner ejector system and a gas stove using the same

Abstract

The present application relates to a kind of burner ejector system and the gas stove of application with the ejector system, the burner ejector system includes with: ejector pipe, with gas inlet end;Gas inlet seat, with gas flow outlet, along the direction of gas flow, gas inlet seat is arranged in the upstream of gas inlet end, and gas flow outlet is opposite with gas inlet end and there is gap between each other;Gas inlet seat also has air flow outlet, air flow outlet is arranged in the peripheral partial area of gas flow outlet, wherein the gap between the region that is not arranged air flow outlet and ejector pipe is at least partially formed with opening;Gas inlet seat also includes air blowing device, along the direction of air flow, air blowing device is in fluid communication with the upstream of air flow outlet.Compared with prior art, the advantage of the present application is that the part of the peripheral region of gas flow outlet which is not arranged air flow outlet carries out the natural induction of ambient air, and natural induction is not disturbed by the air discharged by air flow outlet.

Description

Technical Field

[0001] This invention relates to the field of household kitchen appliances technology, and more particularly to a burner ejector system and a gas stove using the ejector system. Background Technology

[0002] Most gas stoves on the market currently use atmospheric mixing combustion. During combustion, to ensure combustion stability and prevent backfire, the gas needs to be mixed with air (naturally injected air) to form premixed gas. However, this traditional gas-air mixing method still has the problem of insufficient mixing, resulting in incomplete combustion, low thermal efficiency, and excessive flue gas emissions.

[0003] To address this, some burners now supplement the insufficient natural air intake by incorporating a blower. For example, Chinese Patent No. ZL201120141967.3 (Authorization Announcement No. 202109479U) discloses a blower-type household gas stove burner, which includes a controller, a blower, and a burner. The burner includes a burner base, a flame distributor, an air distributor, a gas distributor, a conduit, an injection mixing pipe, and a nozzle. The flame distributor has combustion holes and secondary air passages. Primary air is supplied through two air pipes connected to the blower outlet, one of which is connected to the burner nozzle installation point.

[0004] This burner combines natural injection and forced air supplementation. However, because the gas nozzle is equipped with an air duct that opens axially towards the injector tube, and the opening of the air duct surrounds the outer periphery of the gas nozzle, the blower supplies primary air from the circumference of the air duct. As a result, the primary air introduced from the blower will surround the gas nozzle, thus forming an "air curtain" that blows the air between the air duct and the injector tube outward, affecting natural injection. Therefore, further improvements are needed. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a burner ejector system that can avoid the influence of primary air introduced by the blower on natural ejection.

[0006] The second technical problem to be solved by the present invention is to provide a gas stove that uses the above-mentioned ejector system.

[0007] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a burner ejector system, comprising:

[0008] Ejector tube, with an air inlet end;

[0009] An air inlet seat has a gas flow outlet. Along the gas flow direction, the air inlet seat is located upstream of the air inlet end, and there is a gap between the gas flow outlet and the air inlet end.

[0010] The air intake also has an air outlet, which is located in a localized area surrounding the gas flow outlet.

[0011] The gap between the area without an air outlet and the ejector tube is at least partially open;

[0012] The air intake seat also includes a blower device, which is in fluid communication with the upstream of the air outlet along the air flow direction.

[0013] By offsetting the air outlet relative to the gas outlet, the portion of the outer area of ​​the gas outlet without an air outlet can be naturally injected with outside air. Thus, the natural injection of outside air in the corresponding gap will not be interfered with by the air discharged from the air outlet, thereby avoiding the influence of forced draft on natural injection. This ensures that the ratio of primary air injected by natural injection to the gas injected through the gas outlet channel remains within a certain range, preventing interference that could lead to excessively high or low ratios, and ensuring the combustion thermal efficiency and complete combustion of the burner.

[0014] Preferably, the air outlets are offset in such a way that there are at least two air outlets arranged at intervals in the peripheral area of ​​the gas outlet.

[0015] Furthermore, the air outlet has at least two, with at least one air outlet located above and below the gas outlet. Thus, the upper air outlet can push the gas downwards, preventing it from rising, while the lower air outlet ensures that air can also be supplied below the gas outlet, resulting in a uniform air intake above and below the gas outlet.

[0016] To reduce the impact of gas and air rising and to ensure uniform injection, the flow area of ​​the air outlet located above the gas outlet should not be less than the flow area of ​​the air outlet located below the gas outlet.

[0017] Preferably, in order to further reduce the influence of gas and air rising and make the injection uniform, the ratio of the flow area of ​​the air outlet located above the gas outlet to the flow area of ​​the air outlet located below the gas outlet is 1:1 to 2.27:1.

[0018] Preferably, the ejector tubes have at least two with different flow rates, and the ratio of the flow area of ​​the gas flow outlet and the air flow outlet opposite to the ejector tube with the smaller flow rate is 1:2.5 to 1:8.1. This ensures that the primary air supplied by the blower is sufficient while minimizing the flow area to further reduce the impact on the natural ejection of external air, and at the same time ensures the air volume and velocity of the primary air supplied by the blower to avoid uneven mixing after mixing with the gas ejected from the gas flow outlet.

[0019] Preferably, the ejector tubes have at least two with different flow rates, and the ratio of the flow area of ​​the gas flow outlet and the air flow outlet opposite to the ejector tube with the larger flow rate is in the range of 1:30 to 1:40. This ensures that the primary air supplied by the blower is sufficient while minimizing the flow area, thereby further reducing the impact on the natural ejection of external air, and at the same time ensuring the air volume and velocity of the primary air supplied by the blower to avoid uneven mixing after mixing with the gas ejected from the gas flow outlet.

[0020] Furthermore, the air intake seat also includes a blower channel with two opposing ends, one end being an air inlet and the other end being the aforementioned air outlet. The flow area of ​​the blower channel gradually decreases from the air inlet to the air outlet. This guides and accelerates the primary air supplied by the blower, and the reduced flow area at the air outlet further minimizes interference with the natural entrainment of external air.

[0021] Preferably, in order to better guide and accelerate the airflow, the ratio of the flow area of ​​the airflow outlet to the airflow inlet is 1:1.4 to 1:1.6.

[0022] Furthermore, the air intake seat also includes a gas outlet channel, which has two opposite ends, one end of which is a gas flow inlet and the other end is the aforementioned gas flow outlet. The gas flow inlet is used to communicate with the gas source fluidly. The gas outlet channel and the blower channel extend in the same direction to ensure that air is blown out smoothly from the air outlet and to avoid turbulence caused by turning.

[0023] To ensure that the air outlet is as far away from the gas outlet as possible, minimizing the impact on the natural injection of the gas, and to prevent the air ejected from the air outlet from directly impacting the edge of the inlet port of the ejector tube, when the ejector system is installed horizontally, the vertical distance between the highest point of the air inlet of the blower channel above the gas outlet and the horizontal plane where the center of the gas outlet is located is greater than the vertical distance between the highest point of the air outlet and the horizontal plane where the center of the gas outlet is located. Similarly, the vertical distance between the lowest point of the air inlet of the blower channel below the gas outlet and the horizontal plane where the center of the gas outlet is located is greater than the vertical distance between the lowest point of the air outlet and the horizontal plane where the center of the gas outlet is located. This ensures that the direction of the airflow from the air outlet is towards the horizontal plane where the center of the gas outlet is located.

[0024] Furthermore, the ejector tube also has a throat; the ejector system is installed horizontally, and the intersection of the horizontal plane where the center of the gas outlet is located and the throat forms a centerline. The shape enclosed by the outline of the throat's cross-section has a flow area S1 above the centerline and a flow area S2 below the centerline, satisfying S1 > S2. By making the flow area of ​​the throat above the centerline larger than that below the centerline, the upper flow area is expanded. Even if there is uneven intake caused by gas and air rising, the gas and ejector air entering the ejector tube can still provide a larger flow area in the upper part where gas and air are less abundant when they reach the throat. This increases the gas flow rate of gas and air entering the mixing section, thereby ensuring that the gas flow rates in the upper and lower parts of the mixing section are balanced relative to the plane where the center of the gas outlet is located, thus promoting uniform mixing, improving ejection efficiency, and ultimately ensuring complete combustion.

[0025] Preferably, in order to further ensure uniform air intake in the upper and lower parts, the value range of S1:S2 is ≤1.45.

[0026] Furthermore, to facilitate the expansion of the upper flow area, the outline of the throat cross-section has at least one first protrusion in the portion above the center line, and the first protrusion is shaped to bulge upward in a direction away from the center line.

[0027] To improve the gas injection capability, there are at least two gas flow outlets corresponding to the same ejector tube, and the centers of each gas flow outlet are on the same horizontal plane.

[0028] Furthermore, at least one second protrusion is formed on the portion of the throat cross-section below the centerline. This second protrusion protrudes upwards towards the centerline and is located between two adjacent gas flow outlets. This reduces the impact of increased entrained air caused by the superposition of negative pressure zones formed by the injection of gas from two adjacent gas flow outlets, thus reducing uneven air intake.

[0029] Furthermore, the air intake seat has a gas outlet passage, a blower passage, and an air intake chamber that is fluidly connected to the blower and the blower passage respectively. Along the direction of air flow, the air intake chamber is located upstream of the blower passage.

[0030] The air intake seat is also provided with a partition rib for separating the air intake chamber. A gas intake channel is formed in the partition rib, and the gas intake channel is in fluid communication with the gas outlet channel and the external gas source.

[0031] By setting up the partition ribs, the partition ribs can both form a gas intake channel, allowing the air blown in by the blower to fully contact the surface of the partition ribs, cool the gas in the gas intake channel, and reduce the gas rising; and also divide the intake chamber, thereby accelerating the air blown in by the blower.

[0032] Preferably, the blower channels have at least two with different flow rates, and the dividing ribs divide the air intake chamber into at least two sub-cavities. Each sub-cavity corresponds to at least one blower channel, and the at least two sub-cavities correspond to blower channels with different flow rates. This can guide and rectify the air blown in by the blower device, avoid turbulence, and reduce the ejection effect.

[0033] Furthermore, both the gas inlet channel and the gas outlet channel extend laterally and are perpendicular to each other, while the gas outlet channel and the blower channel extend in the same direction. The gas outlet channel faces the gas inlet, and the blower device includes a blower with an air outlet facing the gas inlet of the gas outlet channel, ensuring that the blower's air outlet direction is consistent with the extension direction of the gas outlet channel. This results in a compact and highly integrated intake structure, eliminating the need for additional openings for the gas pipe to pass through, and ensuring good sealing.

[0034] Furthermore, to facilitate fluid communication between the blower and the air intake chamber, the blower device also includes a hollow outer shell that is fluidly connected to the air intake chamber. The outer shell is disposed between the air intake seat and the blower, and an air outlet chamber is formed inside the outer shell. The air outlet of the blower is disposed on the side of the outer shell away from the air intake chamber and is fluidly connected to the air outlet chamber.

[0035] Furthermore, the blower channels have at least two with different flow rates, and the air outlet is opposite to the blower channel with the larger flow rate, thereby meeting the needs of different air volumes.

[0036] Furthermore, in order to ensure uniform pressure in the air outlet chamber, the volume of the air outlet chamber inside the outer casing gradually decreases from the side corresponding to the blower channel with a larger flow rate to the side corresponding to the blower channel with a smaller flow rate.

[0037] Furthermore, in order to facilitate guiding the airflow to enter the blower channel with a smaller flow rate, the inner wall surface of the outer shell connected to the blower outlet forms a guide surface. The guide surface gradually slopes towards the air inlet chamber from the point connected to the blower outlet towards the position corresponding to the blower channel with a smaller flow rate.

[0038] To better guide air from the intake chamber into the blower channel, a dividing section is provided within the intake chamber to guide the air within the intake chamber towards the blower channel. This dividing section is located between blower channels with different flow rates. Because the dividing ribs are arranged laterally, the dividing section also serves to separate the cavities corresponding to the inner and outer ring ejector tubes.

[0039] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a gas stove, characterized in that: it applies a burner injection system as described above.

[0040] Compared with the prior art, the advantages of this invention are as follows: By setting the dividing ribs, the dividing ribs not only form the gas intake channel but also divide the intake chamber, thereby guiding and rectifying the air blown in by the blower. Furthermore, the air can fully contact the surface of the dividing ribs before flowing from the intake chamber into the blower channel, cooling the gas in the gas intake channel and reducing gas rise. Compared with the prior art, the advantages of this invention are as follows: By setting the air outlet in a localized area surrounding the gas outlet, the gap between the area without an air outlet in the peripheral area of ​​the gas outlet and the ejector tube is at least partially open. This open portion allows for the natural ejection of external air (outside the ejector system). Therefore, the natural ejection of external air within this corresponding gap is not interfered with by the air discharged from the air outlet, thus avoiding the blower affecting the natural ejection. This ensures that the ratio of primary air ejected naturally and the gas injected into the gas outlet channel remains within a certain range, preventing interference that could lead to excessively high or low ratios, and ensuring the combustion thermal efficiency and complete combustion of the burner. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the burner ejector system according to the first embodiment of the present invention;

[0042] Figure 2This is a schematic diagram of the burner ejector system concealing the ejector tube and blower device according to the first embodiment of the present invention.

[0043] Figure 3 This is a schematic diagram of the burner ejector system concealing the ejector tube and blower device according to the first embodiment of the present invention (and...). Figure 2 (Different perspectives);

[0044] Figure 4 This is a cross-sectional view of the burner ejector system with the ejector tube and blower device hidden, according to the first embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the ejector tube of the burner ejector system according to the first embodiment of the present invention;

[0046] Figure 6 This is a cross-sectional schematic diagram of the nozzle of the ejector tube of the burner ejector system according to the first embodiment of the present invention.

[0047] Figure 7 This is a cross-sectional view (horizontal section) of the burner ejector system according to the first embodiment of the present invention;

[0048] Figure 8 This is a cross-sectional view (horizontal section, with) of the burner ejector system of the first embodiment of the present invention. Figure 7 parallel);

[0049] Figure 9 This is a schematic diagram of the air intake seat of the burner ejector system according to the second embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the air intake seat of the burner ejector system according to the third embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram of the burner ejector system according to the fourth embodiment of the present invention;

[0052] Figure 12 This is an exploded structural diagram of the burner ejector system according to the fourth embodiment of the present invention;

[0053] Figure 13 This is a schematic diagram of the burner ejector system according to the fifth embodiment of the present invention;

[0054] Figure 14 This is an exploded view of the burner ejector system according to the fifth embodiment of the present invention;

[0055] Figure 15 This is a schematic cross-sectional view of the injector tube of the burner injector tube assembly according to the sixth embodiment of the present invention;

[0056] Figure 16This is a cross-sectional schematic diagram of the injector tube of the burner injector tube assembly according to the seventh embodiment of the present invention;

[0057] Figure 17 This is a schematic cross-sectional view of the ejector tube of the burner ejector tube assembly according to the eighth embodiment of the present invention. Detailed Implementation

[0058] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0060] Example 1

[0061] See Figures 1-5 This is the first embodiment of the invention. The burner ejector system of this embodiment includes an air inlet seat 1, an ejector tube 2, and a blower device 3, and is mainly used in gas stoves. The air inlet seat 1 is disposed between the ejector tube 2 and the blower device 3, and the end of the ejector tube 2 facing the air inlet seat 1 forms an air inlet end 21. The ejector tube 2, along the airflow direction and according to the change in cross-section, includes a contraction section 22, a mixing section 23, and a diffuser section 24, wherein a throat 25 is formed at the junction of the contraction section 22 and the mixing section 23. The port of the contraction section 22 furthest from the mixing section 22 constitutes the aforementioned air inlet end 21.

[0062] The intake seat 1 contains a gas outlet channel 11 and a blower channel 12. The gas outlet channel 11 has a gas inlet 111 and a gas outlet 112. The gas inlet 111 is in fluid communication with a gas source, and the gas outlet 112 is positioned opposite to the inlet end 21 of the ejector tube 2. The blower channel 12 has an air inlet 121 and an air outlet 122. The air inlet 121 is in fluid communication with a blower 3, which blows air into the blower channel 12 from the air inlet 121. The air inlet 122 is opposite to the inlet end 21 of the ejector tube 2. In this embodiment, the gas outlet channel 11 and the blower channel 12 extend in the same direction. They can be parallel to each other or form a certain angle between them. The aforementioned gas flow inlet 111 and gas flow outlet 112 are respectively formed at two opposite ends of the gas outlet passage 11, and the air flow inlet 121 and air flow outlet 122 are respectively formed at two opposite ends of the gas outlet passage 12. The gas flow outlet 112 can be realized by opening the gas outlet passage 11, or it can be realized by setting a nozzle at the end of the gas outlet passage 11.

[0063] Along the direction of gas flow, the inlet seat 1 is located upstream of the injector tube 2. The gas outlet 112 and the inlet end 21 of the injector tube 2 are opposite each other and there is a gap between them.

[0064] To prevent the primary air introduced by the blower 3 from forming an "air curtain" that could affect the natural ejection of the gas, the air outlet 122 is offset and positioned in the peripheral area of ​​the gas outlet 112. Instead of completely surrounding the gas outlet 112 as described in the background section, the air outlet 122 is only located in certain areas of the peripheral area of ​​the gas outlet 112. The gap between the area where the air outlet 122 is not located and the ejector tube 2 at least partially forms an opening 4. This opening 4 is used to allow external air (outside the ejector system) to be naturally ejected into it. Figure 1As shown in the figure, in this embodiment, the opening 4 forms a complete ring, so that outside air can be introduced at any open position in the circumference of the gap, as long as the primary air introduced by the blower 3 does not form a complete ring-shaped air curtain. By offsetting the air outlet 122 relative to the gas outlet 112, the outer area of ​​the gas outlet 112 can be free of the open gap of the air outlet 122 for natural air injection. Furthermore, at least part of the path for the outside air to enter the gap does not overlap with the air outlet 122. This overlap means that at least part of the projection of the outside air path onto the inlet end 21 does not overlap with the projection of the air outlet 122 onto the inlet end 21. Within this corresponding gap, there is no air curtain caused by the air discharged from the air outlet 122 (equivalent to a gap in the air curtain). Therefore, the natural injection of outside air within this corresponding gap is not disturbed by the air discharged from the air outlet 122, thus avoiding the influence of forced draft on natural injection. This maintains the ratio of primary air to gas injected through the gas outlet channel 11 within a certain range, preventing interference that could lead to excessively high or low ratios. This ensures a suitable and uniform mixing ratio of gas and primary air, achieving complete combustion at the rear end, with a flame temperature reaching 1100℃. This increases the heat absorption rate of the cookware by 10% compared to conventional injection methods.

[0065] When the burner is working, the heat generated at its head is transferred to the main body and surrounding components, and the air in the vicinity is gradually heated. The temperature increase is more pronounced the closer to the burner. When a high temperature is reached, the gas ejected from the gas outlet 112 is entrained by the nearby high-temperature air and is rapidly heated in the ejector tube, causing its volume to increase rapidly and its density to decrease. The influence of buoyancy on the direction of gas ejection cannot be ignored, and the trajectory of the gas injection will have a certain upward tilt. The speed of the airflow entering from the surroundings changes, which increases the amount of air ejected below the horizontal plane where the center of the gas outlet 112 is located (the space for naturally ejected air to enter increases), while the amount of air ejected above the plane where the center of the gas outlet 112 is located decreases (the space for naturally ejected air to enter decreases). In addition, the naturally ejected outside air also tends to rise after being rapidly heated, further reducing the amount of air above the plane where the center of the gas outlet 112 is located. As a result, the gas injected from the gas outlet 112 and the mixed gas naturally drawn into the ejector tube by the outside air will have a smaller gas flow rate above the plane where the center of the gas outlet 112 is located than the gas flow rate below the plane where the center of the gas outlet 112 is located. This will lead to uneven mixing, a decrease in the amount of ejected air, and even incomplete combustion.

[0066] Therefore, at least two air outlets 122 are provided, one above and one below the gas outlet 112 (here, "above" and "below" refer to their orientation in the installed state). In this embodiment, two air outlets 122 are provided, distributed vertically relative to the gas outlet 112. The air outlets 122 are spaced apart above and below the gas outlet 112, and corresponding parameters such as flow area and outlet angle are adjusted to ensure uniform gas flow from the gas outlet 112 and uniform air flow from the air outlets 122, resulting in a balanced injection volume.

[0067] Combination Figure 6 In the installed state, the gas outlet 112 and the injector 2 are installed horizontally. The horizontal plane where the center of the gas outlet 112 is located divides the gas outlet 112 into two symmetrical upper and lower parts. Figure 5 The horizontal straight line (center line X) in the diagram is the intersection of the horizontal plane where the center of the gas flow outlet 112 is located and the throat 25 (the plane in which it is located).

[0068] Cross-section of throat 25 ( Figure 3 The shape enclosed by the outline of the vertical cross-section (shown in the figure) (there are two separate outlines in the figure because the ejector tube 2 has a certain wall thickness; the outlines mentioned below are all inner outlines) has a flow area of ​​S1 above the centerline X and a flow area of ​​S2 below the centerline X, satisfying S1 > S2. That is, the flow area of ​​the throat 25 above the centerline X is greater than the flow area of ​​the throat 25 below the centerline X, thus expanding the upper flow area relative to the symmetrical ejector tube structure. Even if there is uneven air intake caused by gas and air rising, the gas and ejected air can still provide a larger flow area in the upper part where there is less gas and air when they reach the throat 25 after entering the ejector tube 2. This increases the gas flow rate of gas and air entering the mixing section 23, thereby balancing the gas flow rates of the upper and lower parts of the mixing section 23 relative to the plane where the center of the gas outlet 112 is located, thus improving the uniformity of mixing and making combustion more complete. Preferably, the range of S1:S2 is ≤1.45.

[0069] In this embodiment, to facilitate the formation of the outline of the throat 25 cross-section (S1 > S2), the portion above the center line X has at least one first protrusion 251, which protrudes upwards in a direction away from the center line X. Corresponding to each ejector tube 2, the number of gas flow outlets 112 can be at least two, thereby solving the problem of insufficient natural air ejection from a single gas flow outlet 112. The centers of each gas flow outlet 112 are on the same horizontal plane; that is, the gas flow outlets 112 are arranged at intervals in the horizontal direction. In this embodiment, there are two gas flow outlets 112.

[0070] When at least two gas flow outlets 112 are provided, the negative pressure zones formed by the two gas flow outlets 112 overlap in the area between the two gas flow outlets 112. As a result, at least one second protrusion 252 is formed on the portion of the outline of the throat 25 cross section below the center line X. The second protrusion 252 is shaped to bulge upward in the direction close to the center line X. The second protrusion 252 is formed at the position between two adjacent gas flow outlets 112, thereby reducing the impact of the increase in ejected air caused by the overlap of negative pressure zones and reducing uneven intake.

[0071] The vertical distance from the highest point of the first protrusion 251 to the center line X is D1, and the vertical distance from the highest point of the second protrusion 252 to the center line X is D2, and the range of D1:D2 is 1.25:1 to 2.15:1.

[0072] See Figure 5 In this embodiment, the preferred method for forming the outline of the throat 25 cross-section is to use several circles or ellipses (in this embodiment, two circles with equal radii, such as...). Figure 5 The two points where the center line X intersects with the outline of the throat 25 cross section are two points where two circles are far apart. The centers O1 and O2 of the two circles are located on the center line X. The part below the center line X is the non-intersecting part of the two circles, and a chamfer is formed at the intersection point. The chamfer position is the second protrusion 252 mentioned above. The part above the center line X is formed by connecting the points of each non-intersecting part of each circle with an arc and the line segments of the two circles on both sides of the arc. The arc connecting the two circles constitutes the first protrusion 251 mentioned above. Preferably, the vertical line passing through the center line X and located at the center between the two intersection points of the outline and the center line is taken as the axis Y. The axis Y is perpendicular to the center line X. The part of the outline of the throat 25 cross section located on both sides of the axis Y is symmetrical with respect to the axis Y. The intersection point of the two circles is located on the axis Y.

[0073] Within the contraction section 22, a first transition structure 221 is formed gradually from the air inlet end 21 to the mixing section 23, corresponding to the first protrusion 251 and the second protrusion 252 of the throat 25. Within the mixing section 23, a second transition structure 231 is formed, corresponding to the first protrusion 251 and the second protrusion 252 of the throat 25.

[0074] Existing burners typically include an inner ring burner and an outer ring burner, thereby heating the pot body in a combination of external and internal annular flames. Accordingly, there are at least two ejector tubes 2, as in this embodiment, one corresponding to the outer ring and one to the inner ring (this correspondence between the ejector tube 2 and the burner is prior art, as described in the background section regarding large and small ejector tubes), with one ejector tube 2 having a higher flow rate than the other. Figure 5 As shown in the diagram, the ejector tube 2 on the left corresponds to the inner ring, and the ejector tube 2 on the right corresponds to the outer ring, as shown in the diagram. Figure 2 As shown, the two gas outlets 112 on the left correspond to the outer ring ejector tube 2, and the gas outlet 112 on the right corresponds to the inner ring ejector tube 2. Each ejector tube 2 has a corresponding gas outlet channel 11 and air channel 12, and the ratio of the flow area (cross-sectional area for gas or air to pass through) of the gas outlet 112 and air outlet 122 corresponding to each ejector tube 2 is in different ranges. The ratio of the cross-sectional area (the area through which gas or air passes) of the gas outlet 112 and air outlet 122 opposite to the inner ring ejector tube 2 is 1:2.5 to 1:8.1, and the ratio of the cross-sectional area of ​​the gas outlet 112 and air outlet 122 opposite to the outer ring ejector tube 2 is 1:30 to 1:40. This ensures that the primary air supplied by the blower 3 is sufficient while minimizing the cross-sectional area to further reduce the impact on the natural ejection of the outside air. At the same time, it ensures the air volume and velocity of the primary air supplied by the blower 3 to avoid uneven mixing after mixing with the gas injected from the gas outlet 112.

[0075] To further reduce the impact of gas and air rising and to ensure uniform injection, the flow area of ​​the air outlet 122 located above the gas outlet 112 is not less than the flow area of ​​the air outlet 122 located below the gas outlet 112. Preferably, the ratio of the flow area of ​​the air outlet 122 located above the gas outlet 112 to the flow area of ​​the air outlet 122 located below the gas outlet 112 is 1:1 to 2.27:1.

[0076] The flow area of ​​the air inlet 121 of the blower channel 12 is larger than that of the air outlet 122. The flow area of ​​the blower channel 12 gradually decreases from the air inlet 121 to the air outlet 122, thereby guiding the air blown in by the blower device 3 and accelerating it (the gradual decrease in flow area from the inlet to the outlet makes the blower channel 12 resemble an acceleration channel). Furthermore, the reduced flow area of ​​the air outlet 122 further reduces interference with the natural entrainment of external air. Preferably, the ratio of the flow area of ​​the air outlet 122 to the air inlet 121 is 1:1.4 to 1:1.6.

[0077] Due to the limited installation space within the cooktop, the end face areas of the gas outlet 112 and air outlet 122 on the air intake seat 1 are relatively small, and the air inlet port (not shown) of the injector tube is also small. To ensure that the air outlet 122 is as far away from the gas outlet 112 as possible, reducing the impact on natural gas injection, and to prevent the air ejected from the air outlet 122 from directly impacting the edge of the air inlet port of the injector tube, it is preferable that the airflow direction ejected from the air outlet 122 tends to be towards the horizontal plane where the center of the gas outlet 112 is located (the horizontal plane when the injector system is installed horizontally). In this embodiment, where the air outlets 122 are arranged vertically, the air ejected from the upper air outlet 122 is inclined downwards, while the air ejected from the lower air outlet 122 is inclined upwards. Furthermore, the gas ejected from the gas outlet 122 can also provide a certain kinetic energy to the airflow, thus accelerating it.

[0078] To guide the airflow in the desired direction, the vertical distance between the highest point of the air inlet 121 of the blower duct 12 located above the gas outlet duct 11 and the horizontal plane containing the center of the gas outlet 112 must be greater than the vertical distance between the highest point of the air outlet 122 and the horizontal plane containing the center of the gas outlet 112. Similarly, the vertical distance between the lowest point of the air inlet 121 of the blower duct 12 located below the gas outlet duct 11 and the horizontal plane containing the center of the gas outlet 112 must be greater than the vertical distance between the lowest point of the air outlet 122 and the horizontal plane containing the center of the gas outlet 112.

[0079] Furthermore, in this embodiment, the vertical distance between the lowest point of the air inlet 121 of the blower duct 12 located above the gas outlet duct 11 and the horizontal plane containing the center of the gas outlet 112 is less than the vertical distance between the lowest point of the air outlet 122 and the horizontal plane containing the center of the gas outlet 112, and the slope of the line connecting the two highest points is greater than the slope of the line connecting the two lowest points. Similarly, the vertical distance between the highest point of the air inlet 121 of the blower duct 12 located below the gas outlet duct 11 and the horizontal plane containing the center of the gas outlet 112 is less than the vertical distance between the highest point of the air outlet 122 and the horizontal plane containing the center of the gas outlet 112, and the slope of the line connecting the two lowest points is greater than the slope of the line connecting the two highest points. This ensures the direction of airflow introduced by the blower.

[0080] Alternatively, the vertical distance between the lowest point of the air inlet 121 of the blower duct 12 located above the gas outlet duct 11 and the horizontal plane where the center of the gas outlet 112 is located can also be greater than or equal to the vertical distance between the lowest point of the air outlet 122 and the horizontal plane where the center of the gas outlet 112 is located; the vertical distance between the highest point of the air inlet 121 of the blower duct 12 located below the gas outlet duct 11 and the horizontal plane where the center of the gas outlet 112 is located can also be greater than or equal to the vertical distance between the highest point of the air outlet 122 and the horizontal plane where the center of the gas outlet 112 is located.

[0081] See Figure 1 , Figure 3 , Figure 4 , Figure 7 and Figure 8 The air intake seat 1 also has an air intake chamber 13 that opens towards the blower device 3. In the direction of air flow from the blower device 3, the air intake chamber 13 is located upstream of the blower channel 12. The air intake seat 1 has the aforementioned air inlet 121 on the downstream wall of the air intake chamber 13. The air intake seat 1 also has a partition rib 14, and a gas intake channel 141 is formed within the partition rib 14. The end of the gas intake channel 141 facing outwards from the air intake seat 1 is used to communicate with an external gas source (usually a gas supply pipeline).

[0082] By setting the partition rib 14, the air intake chamber 13 is divided into at least two independent sub-cavities 131, thereby dividing the air intake chamber 13 into smaller cavities. Each sub-cavity 131 has a smaller flow area, which can separate the air introduced into the air intake chamber 13 by the blower 3 and allow it to flow downstream from different sub-cavities 131, thus accelerating the airflow. In this embodiment, preferably, each sub-cavity 131 corresponds to a blower channel 12 (air inlet 121). Thus, the partition rib 14 serves both to form the gas intake channel 141 and to divide the air intake chamber 13, thereby guiding and rectifying the air blown in by the blower 3. Since the airflow direction of the blower 3 is staggered with that of the gas intake channel 141 (preferably in a roughly perpendicular shape), the air can fully contact the surface of the partition rib 14 before flowing from the air intake chamber 13 into the blower channel 12, cooling the gas in the gas intake channel 141 and reducing the unevenness caused by the gas rising. Alternatively, some sub-cavities 131 may correspond to at least one air passage 12, while some sub-cavities 131 may not have a corresponding air passage 12.

[0083] In this embodiment, the partition rib 14 is arranged laterally, especially horizontally (in the installed state), thereby dividing the air intake chamber 13 into upper and lower sub-chambers 131. The gas intake passage 141 is arranged at an angle to the aforementioned gas outlet passage 11. Preferably, both the gas intake passage 141 and the gas outlet passage 11 extend horizontally and are perpendicular to each other. The gas outlet passage 11 and the blower passage 12 extend in the same direction, and they can be parallel to each other or form a certain angle between them.

[0084] The blower device 3 includes a housing 31 and a blower 32. The housing 31 is disposed between the air inlet seat 1 and the blower 32. It is hollow inside and open on one side facing the air inlet chamber 13, thus forming an air outlet chamber 311 inside the housing 31. The blower 32 has an air outlet 321, which is in fluid communication with the air outlet chamber 311 of the housing 31. The air outlet 321 is located on the side of the housing 31 opposite to the open part of the air inlet chamber 13. Thus, the air outlet direction of the blower 32 is consistent with the extension direction of the blower channel 12 (gas outlet channel 11, and the air outlet 321 also faces the gas inlet 111 of the gas outlet channel 11), so that after the air is discharged from the blower 32, the attenuation of the air velocity is minimized as much as possible after passing through the air outlet chamber 311, the air inlet chamber 13 and the blower channel 12. Compared to the gas supply, nozzle, and blower 32 arrangement described in the background art, the air intake seat 1 in this embodiment has a compact structure, high degree of integration, and does not require additional openings for the gas pipe to pass through, resulting in good sealing performance.

[0085] In this embodiment, there are two sets of gas outlet channels 11. Alternatively, there can be three or more sets, as long as at least two gas outlet channels 11 are ensured, and one of them has a flow rate greater than the others. Since the outer ring ejector tube has a larger flow rate, a larger blower volume is required, while the inner ring ejector tube has a smaller flow rate, to prevent excessive airflow from extinguishing the inner ring flame of the burner, the blower outlet 321 is located close to the side of the blower channel 12 with a larger flow rate, and the blower outlet 321 is directly opposite the sub-cavity 131 corresponding to the blower channel 12 with a larger flow rate.

[0086] The volume of the air outlet chamber 311 within the outer casing 31 gradually decreases from the side corresponding to the blower channel 12 with a larger flow rate to the side corresponding to the blower channel 12 with a smaller flow rate (the pressure decreases the further away from the air outlet 321 of the blower 32), thereby ensuring uniform pressure within the air outlet chamber 311. Preferably, the inner wall surface of the outer casing 31 on the side connected to the air outlet 321 of the blower 32 forms a guide surface 312. The guide surface 312 gradually slopes towards the air inlet chamber 13 from the point connected to the air outlet 321 of the blower 32, moving away from the air outlet 321, i.e., towards the position corresponding to the blower channel 12 with a smaller flow rate. The slope can be a straight surface or an arc-shaped surface as shown in this embodiment, thereby achieving airflow redirection and smoothly guiding it into the blower channel 12 with a smaller flow rate.

[0087] The intake chamber 13 is also provided with a dividing section 15, which is located on the wall surface of each sub-chamber 131, as in this embodiment. Figure 3 As shown, the dividing part 15 is located in the middle of the upper and lower sub-cavities 131, and is extended upward and downward by the dividing ribs 14 respectively. The dividing part 15 is located between different groups of air ducts 12, and guides the airflow entering the air intake cavity 13 to the air ducts 12.

[0088] Example 2

[0089] See Figure 6 In this embodiment, the difference from Embodiment 1 is that the air outlet 122 corresponding to the outer ring ejector 2 has six outlets with different flow areas, partially surrounding the outer periphery of the gas outlet 112. The air outlet 122 corresponding to the inner ring ejector 2 can also be configured in this way.

[0090] Example 3

[0091] See Figure 7In this embodiment, the difference from Embodiment 1 is that the air outlet 122 corresponding to the outer ring ejector 2 is a curved strip shape, partially surrounding the outer periphery of the gas outlet 112. The air outlet 122 corresponding to the inner ring ejector 2 can also be configured in this way.

[0092] Example 4

[0093] See Figure 8 and Figure 9 In this embodiment, the difference from the first embodiment is that a baffle 5 is provided on the outer periphery of the gap between the gas inlet end 21 of the ejector tube 2 and the gas outlet 112. The baffle 5 is an annular shape with a notch. The opening 4 is formed at the notch of the baffle 5. The notch of the baffle 5 can be partially located above the gas outlet 112 and partially located below the gas outlet 112.

[0094] Example 5

[0095] See Figure 10 and Figure 11 In this embodiment, the difference from the above embodiment four is that the notch of the baffle 5 is located below the gas flow outlet 112, and the air flow outlet 122 is only formed above the gas flow outlet 112.

[0096] Example 6

[0097] See Figure 15 In this embodiment, unlike the above embodiment, the second protrusion 252 may not be provided. The outline of the throat 25 cross section is formed by connecting each non-intersecting point of each circle below the center line X with a straight line and the line segments of the two circles on both sides of the arc, as long as S1 > S2 is ensured.

[0098] Example 7

[0099] See Figure 16 In this embodiment, the difference from the first embodiment is that the outline of the throat 25 cross section, the part below the center line X, is formed by taking a point on each non-intersecting part of each circle and connecting it with an upwardly convex arc and the line segments of the two circles on both sides of the arc, as long as S1>S2 is ensured.

[0100] Example 8

[0101] See Figure 17 In this embodiment, the difference from the first embodiment is that the outline of the throat 25 cross section has two second protrusions 252 arranged on the left and right, thereby adapting to the structure of three gas flow outlets 112. Optionally, more second protrusions 252 can also be provided in this way.

[0102] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A burner ejector system, comprising: The ejector tube (2) has an air inlet end (21), and the ejector tube (2) has at least two with different flow rates; An air inlet seat (1) has a gas flow outlet (112). Along the gas flow direction, the air inlet seat (1) is located upstream of the air inlet end (21), and there is a gap between the gas flow outlet (112) and the air inlet end (21). Each ejector tube (2) has a corresponding gas flow outlet (112). Its features are: The air intake seat (1) also has an air outlet (122), which is located in a local area surrounding the gas outlet (112). The gap between the area where no air outlet (122) is provided and the ejector tube (2) is at least partially formed with an opening (4); The air intake seat (1) also includes a blower (3), which is in fluid communication with the upstream of the air outlet (122) along the air flow direction; The air outlet (122) has at least two and is arranged at intervals in the peripheral area of ​​the gas outlet (112); At least one air outlet (122) is provided above and below the gas flow outlet (112).

2. The burner ejector system according to claim 1, characterized in that: The flow area of ​​the air outlet (122) located above the gas flow outlet (112) is not less than the flow area of ​​the air outlet (122) located below the gas flow outlet (112).

3. The burner ejector system according to claim 2, characterized in that: The ratio of the flow area of ​​the air outlet (122) located above the gas flow outlet (112) to the flow area of ​​the air outlet (122) located below the gas flow outlet (112) is 1:1 to 2.27:

1.

4. The burner ejector system according to claim 1, characterized in that: The ratio of the flow area of ​​the gas flow outlet (112) and the air flow outlet (122) opposite to the ejector tube (2) with a smaller flow rate is 1:2.5 to 1:8.

1.

5. The burner ejector system according to claim 1, characterized in that: The ratio of the flow area of ​​the gas flow outlet (112) and the air flow outlet (122) opposite to the ejector tube (2) with a larger flow rate is 1:30 to 1:

40.

6. The burner ejector system according to any one of claims 1 to 5, characterized in that: The air intake seat (1) also includes a blower channel (12), which has two opposite ends, one end being an air inlet (121) and the other end being the aforementioned air outlet (122). The flow area of ​​the blower channel (12) gradually decreases from the air inlet (121) to the air outlet (122).

7. The burner ejector system according to claim 6, characterized in that: The ratio of the flow area of ​​the air outlet (122) and the air inlet (121) is 1:1.4 to 1:1.

6.

8. The burner ejector system according to claim 6, characterized in that: The air inlet (1) also includes a gas outlet channel (11), which has two opposite ends, one end of which is a gas inlet (111) and the other end is the gas outlet (112) mentioned above. The gas inlet (111) is used to communicate with the gas source. The gas outlet channel (11) and the blower channel (12) extend in the same direction.

9. The burner ejector system according to claim 8, characterized in that: When the ejector system is installed horizontally, the vertical distance between the highest point of the air inlet (121) of the blower channel (12) above the gas outlet channel (11) and the horizontal plane where the center of the gas outlet (112) is located is greater than the vertical distance between the highest point of the air outlet (122) and the horizontal plane where the center of the gas outlet (112) is located. The vertical distance between the lowest point of the air inlet (121) of the blower channel (12) below the gas outlet channel (11) and the horizontal plane where the center of the gas outlet (112) is located is greater than the vertical distance between the lowest point of the air outlet (122) and the horizontal plane where the center of the gas outlet (112) is located. This results in the airflow direction of the air outlet (122) being towards the horizontal plane where the center of the gas outlet (112) is located.

10. The burner ejector system according to any one of claims 1 to 5, characterized in that: The ejector tube (2) also has a throat (25). When the ejector system is installed horizontally, the intersection of the horizontal plane where the center of the gas flow outlet (112) is located and the throat (25) forms a center line (X). The shape enclosed by the outline of the cross-section of the throat (25) has a flow area of ​​S1 above the center line (X) and a flow area of ​​S2 below the center line (X), and satisfies S1 > S2.

11. The burner ejector system according to claim 10, characterized in that: The range of values ​​for S1:S2 is ≤1.

45.

12. The burner ejector system according to claim 10, characterized in that: The outline of the throat (25) cross section has at least one first protrusion (251) in the portion above the center line (X), the first protrusion (251) being convex upward in a direction away from the center line (X).

13. The burner ejector system according to claim 10, characterized in that: The portion of the outline of the throat (25) below the center line (X) has at least one second protrusion (252), which is convex upward toward the center line (X).

14. The burner ejector system according to claim 10, characterized in that: The number of gas flow outlets (112) corresponding to the same ejector tube (2) is at least two, and the centers of each gas flow outlet (112) are on the same horizontal plane.

15. The burner ejector system according to claim 14, characterized in that: The portion of the throat (25) cross-section below the center line (X) has at least one second protrusion (252), which is convex upward toward the center line (X) and is located between two adjacent gas flow outlets (112).

16. The burner ejector system according to any one of claims 1 to 5, characterized in that: The air intake seat (1) has a gas outlet channel (11), a blower channel, and an air intake chamber (13) that is fluidly connected to the blower device (3) and the blower channel (12), respectively. Along the air flow direction, the air intake chamber (13) is located upstream of the blower channel (12). The air intake seat (1) is also provided with a partition rib (14) for separating the air intake chamber (13). A gas intake channel (141) is formed in the partition rib (14). The gas intake channel (141) is in fluid communication with the gas outlet channel (11) and the external gas source.

17. The burner ejector system according to claim 16, characterized in that: The blower channel (12) has at least two with different flow rates, and the partition rib (14) divides the air intake chamber (13) into at least two sub-cavities (131). Each sub-cavity (131) corresponds to at least one blower channel (12), and the at least two sub-cavities (131) correspond to blower channels (12) with different flow rates.

18. The burner ejector system according to claim 16, characterized in that: The gas inlet channel (141) and the gas outlet channel (11) extend laterally and are perpendicular to each other. The gas outlet channel (11) and the blower channel (12) extend in the same direction. The gas outlet channel (11) faces the gas inlet (111). The blower device (3) includes a blower (32). The blower (32) has an air outlet (321). The air outlet (321) faces the gas inlet (111) of the gas outlet channel (11), so that the air outlet direction of the blower (32) is consistent with the extension direction of the gas outlet channel (11).

19. The burner ejector system according to claim 16, characterized in that: The blower device (3) includes a blower (32) having an air outlet (321). The blower device (3) also includes a hollow outer shell (31) that is in fluid communication with the air inlet chamber (13). The outer shell (31) is disposed between the air inlet seat (1) and the blower (32). An air outlet chamber (311) is formed inside the outer shell (31). The air outlet (321) of the blower (32) is disposed on the side of the outer shell (31) away from the air inlet chamber (13) and is in fluid communication with the air outlet chamber (311).

20. The burner ejector system according to claim 19, characterized in that: The blower ducts (12) have at least two with different flow rates, and the air outlet (321) is opposite to the blower duct (12) with the larger flow rate.

21. The burner ejector system according to claim 20, characterized in that: The volume of the air outlet chamber (311) inside the outer shell (31) gradually decreases from the side corresponding to the blower channel (12) with a larger flow rate to the side corresponding to the blower channel (12) with a smaller flow rate.

22. The burner ejector system according to claim 21, characterized in that: The inner wall of the outer casing (31) connected to the air outlet (321) of the blower (32) forms a guide surface (312). The guide surface (312) gradually slopes from the point connected to the air outlet (321) of the blower (32) towards the position corresponding to the blower channel (12) with a smaller flow rate, and approaches the air inlet chamber (13).

23. The burner ejector system according to claim 17, characterized in that: The air intake chamber (13) is also provided with a dividing part (15) for guiding the air in the air intake chamber (13) to the blower channel (12), and the dividing part (15) is located between blower channels (12) with different flow rates.

24. A gas stove, characterized in that: The application uses a burner ejector system as described in any one of claims 1 to 23.

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