Gas nozzle, combustor and gas cooker

Abstract

The utility model provides a gas nozzle, a combustor and a gas cooker. The gas nozzle comprises a nozzle body and a pressurizing assembly. The pressurizing assembly comprises a connecting body and a pressurizing cabin; a first connecting port and a second connecting port are formed in the two ends of the connecting body respectively, and the inner diameter of the connecting body is gradually increased from the first connecting port to the second connecting port; one end of the pressurizing cabin is connected with the second connecting port, and a sealing plate is arranged at the other end of the pressurizing cabin; and the air inlet end of the nozzle is connected with the sealing plate and is communicated with the interior of the pressurizing cabin. According to the gas nozzle, the combustor and the gas cooker, the injection power can be improved, the primary air coefficient of the combustor is improved, the effective load of the combustor is improved, emission of CO pollutants in smoke is reduced, and meanwhile the combustion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a gas nozzle, a burner and a gas cooker. Background Art

[0002] Gas cooktops generally operate in the following manner: gas is delivered through a control valve body and a gas pipeline to a nozzle, which then sprays the gas into the burner through its nozzle orifice. The burner's ejector tube, powered by the gas, draws in ambient air, mixing it with the surrounding air, which then flows into the burner head and out through the burner's flame holes. An electric spark controlled by the igniter ignites the gas exiting the burner head's flame holes, completing continuous combustion. The gas nozzle is a critical component of the cooktop. The amount of gas it sprays determines the burner load, the primary air coefficient, and combustion conditions, playing a key role in the overall cooktop performance. Therefore, nozzle injection parameters are particularly critical, and existing nozzles still require further improvement, enhancement, and development. Utility Model Content

[0003] The purpose of the utility model is to provide a gas nozzle which can improve the injection power, thereby improving the primary air coefficient of the burner, increasing the effective load of the burner, reducing the emission of CO pollutants in the flue gas, and improving the combustion efficiency.

[0004] Another object of the present invention is to provide a burner comprising the above-mentioned gas nozzle, which can improve the primary air coefficient, increase the effective load, reduce the emission of CO pollutants in the flue gas, and improve the combustion efficiency.

[0005] Another object of the present invention is to provide a gas cooker comprising the burner mentioned above.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A gas nozzle comprises a nozzle and a booster assembly; the booster assembly comprises a connector and a booster cabin; a first connecting port and a second connecting port are respectively provided at both ends of the connector, and the inner diameter of the connector gradually increases from the first connecting port to the second connecting port; one end of the booster cabin is connected to the second connecting port, and the other end of the booster cabin is provided with a sealing plate; the air inlet end of the nozzle is connected to the sealing plate and communicates with the interior of the booster cabin.

[0008] According to one embodiment of the present invention, a heat-conducting ring is provided on the outer periphery of the pressurized cabin, and the heat-conducting ring is provided with a heat-conducting strip.

[0009] According to one embodiment of the present invention, the inner wall of the pressurized cabin is provided with heat-conducting ribs extending along the axial direction of the pressurized cabin.

[0010] According to one embodiment of the present invention, an annular groove corresponding to the heat conducting ring is provided on the outer wall of the pressurized cabin.

[0011] According to one embodiment of the present invention, an inwardly protruding step portion is provided in the middle of the inner wall of the sealing plate, and the diameter of the step portion gradually increases from the inside to the outside; the air inlet end of the nozzle is provided in the step portion.

[0012] According to one embodiment of the present utility model, a fairing is provided in the connector, an air inlet and an air outlet are respectively provided at both ends of the fairing, and the inner diameter of the fairing gradually increases from the air inlet to the air outlet; a connecting ring is provided on the outer periphery of the air inlet, and the air inlet and the connecting ring are connected by a number of connecting plates; the connecting ring is connected to the inner wall of the first connecting port; and an annular air inlet channel is formed between the fairing and the inner wall of the connector.

[0013] According to one embodiment of the present invention, a plurality of cover bodies corresponding to the shape of the fairing are further provided in the fairing, the air inlet ends of adjacent cover bodies are connected by ribs, and an annular fairing channel is formed between adjacent cover bodies.

[0014] According to one embodiment of the present invention, the nozzle includes a tube body, in which a gas channel, a spray hole, and a mixing channel are sequentially provided; one end of the tube body provided with the gas channel is connected to the sealing plate; the outer wall of the mixing channel is provided with a plurality of air inlet holes, and the air inlet holes are connected to the mixing channel;

[0015] And / or, the inner diameter of the pressurized cabin is greater than twice the inner diameter of the first connecting port.

[0016] The utility model also provides a burner, comprising the above-mentioned gas nozzle.

[0017] The utility model also provides a gas cooker, comprising the burner mentioned above.

[0018] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0019] The gas nozzle, burner, and gas cooker provided by the present invention have a booster assembly that increases the gas pressure within the booster chamber, specifically the gas pressure in front of the nozzle. This increases the nozzle's ejection power and increases the burner load. This increased ejection power also increases the amount of air entrained and injected, improving the primary air coefficient. This increased air allows for more even and thorough mixing of the gas, resulting in more complete combustion and reduced CO emissions from the flue gas. This also improves combustion efficiency, effectively conserving energy and reducing emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention.

[0021] Figure 1 A schematic structural diagram of a gas nozzle provided in an embodiment of the present utility model;

[0022] Figure 2 A schematic diagram of the assembly of a gas nozzle provided in an embodiment of the present utility model;

[0023] Figure 3 A front view of a gas nozzle provided in an embodiment of the present utility model;

[0024] Figure 4 A side view of a gas nozzle provided in an embodiment of the present utility model;

[0025] Figure 5 A top view of a gas nozzle provided in an embodiment of the present utility model;

[0026] Figure 6 for Figure 5 Cross-sectional view in the AA direction;

[0027] Figure 7 A schematic structural diagram of a connecting body of a gas nozzle provided in an embodiment of the present utility model;

[0028] Figure 8 A schematic structural diagram of a pressurized cabin of a gas nozzle provided in an embodiment of the present utility model;

[0029] Figure 9 A schematic structural diagram of a gas nozzle fairing provided in an embodiment of the present utility model;

[0030] Figure 10 A schematic structural diagram of the gas nozzle fairing provided by an embodiment of the present invention from another angle;

[0031] Figure 11 This is a schematic cross-sectional view of a gas nozzle provided in an embodiment of the present utility model.

[0032] Description of reference numerals:

[0033] 1. Nozzle; 11. Gas channel; 12. Spray hole; 13. Mixing channel; 14. Air inlet; 2. Connector; 21. First connecting port; 22. Second connecting port; 23. Air inlet channel; 3. Pressurized cabin; 31. Sealing plate; 32. Thermal rib; 33. Annular groove; 34. Step; 4. Gas pipeline; 5. Thermal ring; 51. Thermal strip; 6. Fairing; 61. Air inlet; 62. Air outlet; 63. Connecting ring; 64. Connecting plate; 65. Cover; 66. Rib; 67. Fairing channel. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with examples. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0035] In the description of the present invention, the words "first", "second" and similar terms do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprises" and similar terms mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects. The terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and other directions or positions are based on the directions or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention. The terms "connected", "connected" and "disposed" used in the present invention should be understood in a broad sense. For example, they can mean fixed connection or detachable connection; direct connection or indirect connection through an intermediate component; wired electrical connection, radio connection, or wireless communication signal connection. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0036] like Figure 1-Figure 5As shown, an embodiment of the present invention provides a gas nozzle, comprising a nozzle 1 and a pressurizing assembly. The pressurizing assembly comprises a connector 2 and a pressurizing chamber 3. The connector 2 is provided with a first connection port 21 and a second connection port 22 at either end, and the inner diameter of the connector 2 gradually increases from the first connection port 21 to the second connection port 22. One end of the pressurizing chamber 3 is connected to the second connection port 22, and the other end of the pressurizing chamber 3 is provided with a sealing plate 31. The air inlet end of the nozzle 1 is connected to the sealing plate 31 and communicates with the interior of the pressurizing chamber 3.

[0037] When gas flows through the pipeline system such as the transmission pipeline, gas control valve, gas pipeline 4, it is inevitable that pressure loss (head loss along the way + local head loss) will occur, resulting in a pressure drop before flowing through the nozzle. The nozzle pressure is the source of the nozzle's injection power. According to the nozzle injection flow formula: Q = 0.0035μd 2 (P / s) (1 / 2) , the pressure P drops, the flow rate Q also drops, and the flow rate Q is proportional to the square root of the pressure P. When the flow rate Q drops, the load decreases, breaking the combustion balance of the burner, causing combustion deterioration, and seriously affecting the normal use of the burner. Therefore, in the gas nozzle provided by the embodiment of the present invention, a boosting component is provided at the air inlet end of the nozzle 1, and the connector 2 of the boosting component is connected to the gas pipeline 4. Figure 6 As shown, the working principle of the booster assembly of the gas nozzle provided by the embodiment of the present invention is as follows: the gas flowing through the gas pipe 4 with an inner diameter of D1 (the inner diameter of the first connecting port 21 of the connector 2 is the same as the inner diameter of the gas pipe 4) has a pressure of P1, a velocity of υ1, and a density of ρ1, and enters the booster cabin 3 through the connector 2, where its pressure is P2 and its velocity is υ2. The gas flow is incompressible flow, and the fluid density remains unchanged, which is ρ1. The inner diameter of the booster cabin 3 is D2. During the flow process, according to the continuity equation, its flow rate remains balanced and unchanged, Q2=Q1, Q=υ*A, that is, υ1×D1 2 =υ2×D2 2 The inner diameter D2 of the pressurized cabin 3 is larger than the inner diameter D1 of the gas pipeline 4. Preferably, the inner diameter of the pressurized cabin 3 is larger than twice the inner diameter of the gas pipeline 4, that is, D2>2D1. The greater the difference in diameter, the more significant the effect. Therefore, υ2<υ1. According to Bernoulli's principle: (P1 / ρg)+(υ1 2 / 2g)=(P2 / ρg)+(υ2 2 / 2g), (υ2 2 / 2g) decreases, while the total value remains unchanged, which inevitably increases the term (P2 / ρg), while ρ and g remain unchanged. Therefore, P2 increases, which increases the gas pressure in the pressurized cabin 3, that is, the gas pressure P2 before the nozzle increases, which increases the ejection power of the nozzle 1. The nozzle injection flow formula is: Q = 0.0035μd 2 (P / s) (1 / 2)As we can see, as P increases, Q also increases, meaning the burner load also increases. Because the ejection power of nozzle 1 increases, the amount of air it entrains and injects also increases, improving the primary air coefficient. More air allows for more even and thorough mixing of the gas, leading to more complete combustion and less CO emissions from the flue gas. This improves combustion efficiency and effectively saves energy and reduces emissions.

[0038] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 As shown, in one embodiment of the present invention, the connector 2 is conical and has a hollow cavity, which functions to change the flow rate of the fluid by changing the cross-sectional area. The first connection port 21 of the connector 2 is provided with an external thread and is connected to the gas pipeline 4. The inner diameter of the first connection port 21 is the same as the inner diameter of the gas pipeline 4. Figure 1 、 Figure 2 、 Figure 6 、 Figure 8 As shown, the pressurized cabin 3 is cylindrical, and its cavity can stabilize the airflow and convert the dynamic pressure of the flowing airflow into static pressure of the airflow.

[0039] In order to further increase the gas pressure in the pressurized cabin 3, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 As shown, in one embodiment of the present invention, a heat-conducting ring 5 is provided around the periphery of the pressurized chamber 3, and the heat-conducting ring 5 is provided with a heat-conducting strip 51. The heat-conducting strip 51 is connected to a heat source, such as a burner, and can transfer some of the heat generated by the burner into the pressurized chamber 3 to increase the temperature of the gas inside the pressurized chamber 3. The heating effect of the heat-conducting ring 5 can increase the temperature of the gas inside the pressurized chamber 3, that is, increase T2. According to the Clapeyron equation: P1*V1 / T1=P2*V2 / T2, T2 increases while the volume of the pressurized chamber 3 remains unchanged, allowing P2 to be further increased, thereby further improving the injection power of the nozzle 1. The heat-conducting ring 5 is made of a material with a high thermal conductivity, such as copper, aluminum, or other metals or alloys.

[0040] In order to enhance heat conversion, the heat obtained from the outside by the heat conducting ring 5 is efficiently and evenly transferred to the air flow in the pressurized cabin 3, effectively increasing the temperature of the internal gas, increasing the internal energy and enthalpy of the gas, such as Figure 6 、 Figure 8 As shown, in one embodiment of the present invention, the inner wall of the pressurized cabin 3 is provided with heat-conducting ribs 32 extending along the axial direction of the pressurized cabin 3. The heat-conducting ribs 32 are arranged at intervals along the circumference of the pressurized cabin 3.

[0041] like Figure 2 、 Figure 8As shown, in one embodiment of the present invention, the outer wall of the pressurized chamber 3 is provided with an annular groove 33 corresponding to the heat-conducting ring 5, and the heat-conducting ring 5 is disposed in the annular groove 33. The annular groove 33 not only provides a mounting position for the heat-conducting ring 5, but also increases the contact area between the heat-conducting ring 5 and the pressurized chamber 3, thereby improving heat conduction efficiency.

[0042] like Figure 6 As shown, in one embodiment of the present invention, an inwardly protruding step 34 is provided in the middle of the inner wall of the sealing plate 31. The diameter of the step 34 gradually increases from the inside to the outside. The air inlet end of the nozzle 1 is inserted into the step 34. The step 34 is an inverted frustum (small diameter at the inner end and large diameter at the outer end). The frustum has a trapped vortex effect, which can change the direction of the airflow, stabilize the airflow velocity, and enhance the static pressure generated by the airflow. It also improves the structural strength of the connection with the nozzle 1.

[0043] In a preferred embodiment of the present invention, the length of the pressurized cabin 3 is greater than or equal to 1.5 times the inner diameter of the pressurized cabin 3 .

[0044] In order to further reduce the outflow speed of the airflow at the second connection port 22 of the connector 2 and play the role of stabilizing and uniforming the flow, as shown in FIG. Figure 2 、 Figure 6 、 Figure 9 、 Figure 10 As shown, in one embodiment of the present invention, a fairing 6 is provided inside the connector 2, and an air inlet 61 and an air outlet 62 are provided at both ends of the fairing 6, and the inner diameter of the fairing 6 gradually increases from the air inlet 61 to the air outlet 62. A connecting ring 63 is provided on the outer periphery of the air inlet 61, and the air inlet 61 and the connecting ring 63 are connected by a plurality of connecting plates 64. The connecting ring 63 is connected to the inner wall of the first connecting port 21. An annular air inlet channel 23 is formed between the fairing 6 and the inner wall of the connector 2. The gas entering from the first connecting port 21 of the connector 2 is divided into two paths: one path flows out through the annular air inlet channel 23, and the other path flows out from the air outlet 62 of the fairing 6 through the inside of the fairing 6. Furthermore, to enhance flow stabilization and uniformity, the fairing 6 is further provided with several covers 65 corresponding to the shape of the fairing 6. The intake ends of adjacent covers 65 are connected by ribs 66, and annular flow channels 67 are formed between adjacent covers 65. This allows the combustion gas entering the fairing 6 to be divided into multiple paths, exiting through different flow channels 67. In this embodiment, only one cover 65 is provided, and the cover 65 and the inner wall of the fairing 6 form the flow channels 67. Preferably, the longitudinal cross-section of the fairing 6 and the covers within it form an angle of 37-40 degrees.

[0045] like Figure 2 、 Figure 6 、 Figure 11As shown, in one embodiment of the present invention, the nozzle 1 includes a tube body, in which a gas channel 11, a nozzle 12 and a mixing channel 13 are sequentially provided. One end of the tube body provided with the gas channel 11 is connected to the sealing plate 31. The outer wall of the mixing channel 13 is provided with a plurality of air inlet holes 14, and the air inlet holes 14 are connected to the mixing channel 13. Specifically, the gas channel 11 is a contraction hole, and its end is connected to the front end of the nozzle 12; the front end of the mixing channel 13 is gradually expanding and connected to the rear end of the nozzle 12, and the rear end of the mixing channel 13 is a section of equal diameter. When the gas enters the gradually contracting gas channel 11, due to the change in the channel area, the static pressure of the gas is converted into dynamic pressure, and it is ejected at high speed through the nozzle 12. The nozzle 12 is a small straight cylindrical section, which can stabilize the outlet airflow. After the gas is ejected at high speed through the nozzle hole 12, a negative pressure chamber is formed in the mixing channel 13, forcing the air outside the nozzle 1 to be sucked into the mixing channel 13 through the air inlet hole 14, that is, the entrainment and injection function of the nozzle 1; the entrained air flow and the gas ejected from the nozzle hole 12 are mixed in the mixing channel 13 and flow out into the ejector pipe of the burner.

[0046] The utility model also provides a burner, comprising the above-mentioned gas nozzle. The nozzle 1 is connected to the ejector pipe of the burner, and the connection method is the existing technology and will not be described in detail.

[0047] The present invention also provides a gas cooker including the burner. The first connection port 21 of the connector 2 is connected to the gas pipeline 4, and the connection method is the existing technology, such as threaded connection, which will not be described in detail.

[0048] The gas nozzle provided by the embodiment of the present invention has the following advantages in addition to the above functions:

[0049] 1. Strong applicability, can be used in various gas stoves;

[0050] 2. Simple processing and manufacturing;

[0051] 3. Convenient and practical;

[0052] 4. Green, environmentally friendly, and can save energy.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gas nozzle, characterized in that: The invention comprises a nozzle (1) and a pressurizing assembly; the pressurizing assembly comprises a connector (2) and a pressurizing cabin (3); a first connecting port (21) and a second connecting port (22) are respectively provided at both ends of the connector (2), and the inner diameter of the connector (2) gradually increases from the first connecting port (21) to the second connecting port (22); one end of the pressurizing cabin (3) is connected to the second connecting port (22), and the other end of the pressurizing cabin (3) is provided with a sealing plate (31); the air inlet end of the nozzle (1) is connected to the sealing plate (31) and communicates with the interior of the pressurizing cabin (3).

2. The gas nozzle according to claim 1, characterized in that The outer periphery of the pressurized cabin (3) is provided with a heat-conducting ring (5), and the heat-conducting ring (5) is provided with a heat-conducting strip (51).

3. The gas nozzle according to claim 2, characterized in that The inner wall of the pressurized cabin (3) is provided with a heat-conducting rib (32) extending axially along the pressurized cabin (3).

4. The gas nozzle according to claim 2, characterized in that The outer wall of the pressurized cabin (3) is provided with an annular groove (33) corresponding to the heat-conducting ring (5).

5. The gas nozzle according to claim 1, characterized in that An inwardly protruding step portion (34) is provided in the middle of the inner wall of the sealing plate (31), and the diameter of the step portion (34) gradually increases from the inside to the outside; the air inlet end of the nozzle (1) is inserted into the step portion (34).

6. The gas nozzle according to claim 1, characterized in that A fairing (6) is provided in the connecting body (2), and an air inlet (61) and an air outlet (62) are provided at both ends of the fairing (6), and the inner diameter of the fairing (6) gradually increases from the air inlet (61) to the air outlet (62); a connecting ring (63) is provided on the outer periphery of the air inlet (61), and the air inlet (61) and the connecting ring (63) are connected via a plurality of connecting plates (64); the connecting ring (63) is connected to the inner wall of the first connecting port (21); and an annular air inlet channel (23) is formed between the fairing (6) and the inner wall of the connecting body (2).

7. The gas nozzle according to claim 6, characterized in that A plurality of cover bodies (65) having a shape corresponding to the shape of the fairing (6) are further provided in the fairing (6); the air inlet ends of adjacent cover bodies (65) are connected via ribs (66), and an annular fairing channel (67) is formed between adjacent cover bodies (65).

8. The gas nozzle according to claim 1, characterized in that The nozzle (1) comprises a tube body, wherein a gas channel (11), a spray hole (12) and a mixing channel (13) are sequentially provided in the tube body; one end of the tube body provided with the gas channel (11) is connected to the sealing plate (31); the outer wall of the mixing channel (13) is provided with a plurality of air inlet holes (14), and the air inlet holes (14) are in communication with the mixing channel (13); And / or, the inner diameter of the pressurized cabin (3) is greater than twice the inner diameter of the first connecting port (21).

9. A burner, characterized in that: The invention comprises a gas nozzle according to any one of claims 1 to 8.

10. A gas cooker, characterized in that: Comprising a burner according to claim 9.

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