Heat flow grill burner

Abstract

The present invention discloses a heat flux grill burner, wherein the hood includes an internal discharge cavity, and a heat outlet opening is formed at the top of the hood; wherein the seat body is located in the internal discharge cavity of the hood, and the exhaust tube is located in the internal discharge cavity of the hood and is arranged above the nozzle on the seat body, and wherein a combustion opening is formed at the top of the exhaust tube; and wherein the flamethrower is arranged at the combustion opening of the exhaust tube. The present invention minimizes the resistance to gas flow in the exhaust tube and improves the exhaust effect.

Description

Technical area

[0001] The present invention relates to the technical field of grill equipment, in particular to a heat flow grill burner. State of the art

[0002] To heat a large area of ​​a grill, multiple burners are usually installed under the grill to heat simultaneously, or multiple pilot tubes and nozzles are used simultaneously to increase combustion heat by increasing the exhaust amount. For example, Chinese patent number CN103216830A discloses a multi-exhaust-tube atmospheric burner connected to a plurality of exhaust tubes, each of which corresponds to a nozzle, allowing multiple nozzles to simultaneously exhaust gas for heating. However, this structure can only control a single exhaust tube or multiple exhaust tubes at the same time. The burner flame is difficult to cover the entire cavity of the grill, and the temperature on the grill surface is difficult to evenly distribute. This not only results in unnecessary energy loss but also poor heating effect and efficiency. Contents of the present invention

[0003] The purpose of the present invention is to develop a heat flow grill burner to overcome the disadvantages of the above-mentioned technology.

[0004] The present invention develops a heat flow grill burner comprising: a hood, the hood being provided with an inner dissipation cavity, a heat outlet opening being formed at the top of the hood and connected to the inner dissipation cavity, and the hood being provided with a gas inlet opening connected to the inner dissipation cavity; a seat body, the seat body being arranged within the inner discharge cavity of the hood and the seat body being provided with nozzles; an exhaust tube, wherein the exhaust tube is arranged in the inner discharge cavity of the hood and the exhaust tube is arranged above the nozzle on the seat body, wherein the inner cavity of the exhaust tube has a rotating body structure, wherein a combustion opening is formed on the top of the exhaust tube and faces the heat outlet opening of the hood; a flamethrower, wherein the flamethrower is arranged at the combustion opening of the ejection tube, wherein the internal cavity of the flamethrower comprises a pressure expansion section remote from the ejection tube and a constriction section located near the ejection tube, wherein the pressure expansion section has a tendency to gradually expand from one end near the ejection tube to the other end remote from the ejection tube, such that the opening diameter of the end near the ejection tube on the pressure expansion section is smaller than the opening diameter of the other end remote from the ejection tube, and wherein the constriction section has a tendency to gradually expand from one end near the pressure expansion section to the other end remote from the pressure expansion section,such that the opening diameter of the end on the constriction section near the pressure expansion section is smaller than the opening diameter of the other end remote from the expansion section, wherein a plurality of through holes are arranged on the inner wall of the flamethrower, wherein the plurality of through holes are arranged in a circular arrangement, wherein the two end openings of each of the through holes are arranged on the inner wall of the constriction section and on the inner wall of the pressure expansion section, respectively.

[0005] The present invention has the following technical effects: The inner cavity of the ejection tube includes a collection section, a transition section, and an expansion section in order from bottom to top, so that the inner cavity of the ejection tube as a whole has a rocket shape. The ejection tube is vertically connected to the seat body, so that the resistance to gas flow in the ejection tube is minimized, thereby forming an upward splash effect that enhances the ejection effect. The inner cavity of the flamethrower, located at the upper end of the ejection tube, includes an upwardly and downwardly distributed pressure expansion section and a constriction section. A throat opening is provided between the pressure expansion section and the constriction section.The inner opening diameter of the pressure expansion section and the constriction section gradually increases in the opposite direction, so that the hot gas from the discharge tube flows through the constriction section, where it accumulates and condenses. Then, the hot gas flows through the throat opening into the constriction section. After diffusing the constriction section, the radiation enhances the discharge effect, not only reduces heat loss, but also increases the heating efficiency. If the number of discharge tubes is more than one, the corresponding number of nozzles is also more than one. The seat body is provided with a plurality of gas inlet channels. The gas inlet channels and the nozzles can be selectively connected.a gas inlet channel is connected to a plurality of nozzles or a nozzle to achieve batchwise or individually controlled gas inlet, thus realizing that a plurality of discharge pipes can be batchwise or individually controlled separately, and ultimately achieving the purpose of quickly adjusting the outlet temperature. Description of the drawings Fig. 1 is a diagram showing the structure of the hood of the present invention; Fig. 2 is a diagram showing the structure of the hood of the present invention in another view; Fig. 3 is a plan view of the overall structure of the present invention; Fig. 4 is a diagram showing the structure of the discharge tube and the seat body of the present invention; Fig. 5 is a diagram showing the structure of the discharge tube and the seat body of the present invention in another view; Fig. 6 is a cross-sectional view of the structure of the discharge pipe and the seat body in the present invention; Fig. 7 is an exploded view of the structure of the discharge tube and the seat body of the present invention; Fig. 8 is a longitudinal sectional view of the structure of the ejection tube and the seat body of the present invention; Fig. 9 is a longitudinal sectional view of the overall structure of the present invention; Fig. 10 is a sectional view of the structure of the through hole of the present invention.

[0006] Reference list: 1. hood; 11. inner discharge cavity; 12. heat outlet port; 13. gas inlet port; 2. seat body; 21. gas inlet channel; 3. nozzle; 4. discharge pipe; 41. collection section; 42. transition section; 43. expansion section; 44. combustion port; 5. tooth-shaped structure; 6. flame thrower; 61. pressure expansion section; 62. throat section; 63. throat opening; 64. through hole; 7. reinforcing bar; 8. separation screen structure. Detailed embodiment

[0007] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the attached drawings. Of course, the described embodiments represent only a portion of the embodiments of the present invention, not all embodiments. Starting from the embodiments of the present invention, all other embodiments that a person with ordinary skill in the art can reach fall within the scope of the present invention.

[0008] In this embodiment, as in Fig.1, a heat flux grill burner comprises a seat body 2, wherein the seat body 2 is removably arranged in a hood 1 by means of fastening elements, the seat body 2 is provided with a nozzle 3, and the seat body 2 is provided with an ejection tube 4 arranged above the nozzle 3; the ejection tube 4 is arranged vertically, and the inner cavity of the ejection tube 4 is a rotating body structure, that is, the cross-section of the inner wall of the ejection tube 4 is circular, conical, or rounded in one or more combinations.

[0009] The discharge tube 4 is provided with a flamethrower 6 at the top. The internal cavity of the discharge tube 4 includes, from bottom to top, the collecting section 41, the transition section 42, and the extension section 43, including the coaxial section. The opening diameter of the collecting section 41 gradually decreases from bottom to top, that is, the collecting section 41 has the shape of a round plateau; the transition section 42 has the same diameter, that is, the transition section 42 has a cylindrical shape; the opening diameter of the extension section 43 gradually increases from bottom to top, that is, it has the shape of a round platform; the length of the extension section 43 is greater than that of the transition section 42 and the collecting section 41.In this embodiment, the length of the collecting section 41, the transition section 42 and the extension section 43 is in the ratio 1:2:4; the lower end of the collecting section 41 is the gas inlet port, the gas sprayed from the nozzle 3 enters the lower end of the collecting section 41, the gas moves upward and passes through the collecting section 41, the transition section 42 and the extension section 43 in succession and arrives at the upper end of the extension section 43 of the flamethrower 6, and the entire inner cavity of the ejection tube 4 is in the shape of a rocket, and the wall of the inner cavity is a smooth surface, which reduces the resistance of the gas flow to ensure the ejection effect.

[0010] The lower end of the collection section 41 also has an isometric section, so that the gas exiting the nozzle 3 can smoothly enter the collection section 41 along the isometric section, which then contracts the gas for collection. The collection section 41 as a whole is a conical cavity structure, so that the gas injected from the nozzle flows into the expansion section 43, where it is first collected and then ejected. The top of the expansion section 43 is an opening, which is the combustion port 44.

[0011] The opening at both ends of the flamethrower 6, the inner cavity of the flamethrower 6 is also a rotating body structure as a channel, the inner cavity of the flamethrower 6 consists of an expansion portion 61 and a narrowing portion 62, the expansion portion 61 and the narrowing portion 62 are distributed up and down, forming a throat opening 63 at the junction, and the lower end of the throat opening 62 is connected to the ejection pipe 4; The top of the expansion portion 61 is provided with a ring of evenly distributed tooth-shaped structures 5, and a separation screen structure 8 is provided at the mouth of the throat opening 63, and an annular groove is provided in the inner wall of the mouth of the throat opening 63, and the edge of the separation screen structure 8 is embedded in the annular slot to form a fixation.

[0012] The effect of the expansion portion 61 is the same as that of the expansion portion 43, so that the gas can form a certain contraction from the expansion portion 43 into the constriction portion 62 and then from the constriction portion 62 into the expansion portion 61, so that the contracted gas can radially enter the jet, so that the gas can be thrown out quickly and in large numbers, and the separation screen structure 8 contributes to the flame emitted from the flamethrower 6 being more stable and uniform.

[0013] The gap between adjacent teeth in the tooth-shaped structure 5 contributes to the mixing of the high-temperature gas and the cold air to form a high-temperature gas with a uniform temperature.

[0014] In this embodiment, the expanding portion 61 and the narrowing portion 62 are both circular or conical bodies of revolution, wherein the length dimension of the expanding portion 61 is smaller than the length dimension of the narrowing portion 62 and the gradual inclination of the narrowing portion 62 is smaller than the gradual inclination of the expanding portion 61, that is, viewed from the longitudinal cross-section, the amplitude of the outwardly expanded opening of the expanding portion 63 is greater than the amplitude of the downwardly expanded opening of the narrowing portion 62.A plurality of through holes 64 are evenly provided in a circular direction on the inner wall of the flamethrower 6. A plurality of these through holes 64 are provided in a circular arrangement, and the through holes 64 penetrate downward to the inner wall of the constriction portion 62, or the openings of the two ends of the through holes 64 are located on the inner wall of the constriction portion 62 and the inner wall of the expansion portion 61, that is, the mouths of the two ends of the through holes 64 are located on the inner walls of the expansion portion 61 and the constriction portion 62, respectively. And the two end openings of the through hole 64 have an elliptical shape on the inner walls of the expansion portion 61 and the constriction portion 62, that is,The longitudinal axis direction of the elliptical openings is the same as the entire axial direction of the discharge tube 4, so that the air flow from the discharge tube 4 can partially pass through the through hole 64 to the injector, ensuring that the high-temperature air flow can be centrally directed to the flamethrower 6. The through hole 64 not only increases the internal passage area of ​​the flamethrower 6 but also forms a velocity difference between the air flow passing through the through hole 64 and the air flow of the flamethrower 6.That is to say, the speed of the air flow through the through hole 64 is lower than the speed of the air flow through the channel of the flamethrower 6, the two different speeds of the air flow mix and improve the stability of the flame, the use of the pressure from the bottom to the top of the direct injection, the formation of the maximum speed to produce the chimney effect, the formation of the mixture of hot and cold air flow to ensure that the power of the air flow increases, while the rising temperature of the air flow remains uniform.If there is no through hole 64, the air flow rate of the flamethrower 6 is too fast, and the formation of the flame is prone to producing an off-flame or tempering phenomenon. That is, the through hole 64 slows down the air flow rate of the channel of the flamethrower 6, to play a certain disturbance. The through hole 64 is relatively large in length and the opening diameter is small, and the inner wall of the hole has a certain wall effect, which improves the flame to adapt to the ability of high and low pressures. The flamethrower 6 and the ejection tube 4 are detachably connected to each other. The flamethrower 6 is placed on top of the extension portion 43, and then the flamethrower 6 is connected to the extension portion 43 by fasteners in the outer circumferential direction.

[0015] The number of ejection tubes 4 is more than two and arranged side by side. In this embodiment, the nozzle 3 and the ejection tube 4 are connected to the seat body 2 sequentially along the longitudinal direction of the seat body 2, and the outer walls of the adjacent ejection tubes 4 are connected to each other by the reinforcing bar 7, which enhances the stability of the ejection tube 4 as a whole.

[0016] Two gas inlet channels 21 are provided in the seat body 2, and when the air inlet channels 21 are not ventilated together, a nozzle 3 is connected to one of the gas inlet channels 21 to cause this nozzle 3 to discharge gas alone, and the other gas inlet channel 21 is connected to at least one of the remaining nozzles 3 to cause the gas to be discharged from this remaining nozzle 3. In this embodiment, the number of gas inlet channels 21 is two, the number of discharge tubes 4 is three, and the number of corresponding nozzles 3 is three, wherein one of the gas inlet channels 21 is connected to two of the nozzles 3 so that the discharge tubes 4 corresponding to the two nozzles 3 can discharge gas simultaneously; the other gas inlet channel 21 is individually connected to one of the remaining nozzles 3 so that the discharge tube 4 corresponding to this nozzle 3 can discharge gas individually, i.e.The plurality of discharge pipes 4 can be controlled in batches or individually to control the output temperature, and the desired temperature of the grill can be quickly adjusted.

[0017] Of course, the two gas inlet channels 21 are compatible with each other. Then, the two gas inlet channels 21 are equivalent to one to which all nozzles 3 are connected.

[0018] The present invention also includes a hood 1. In this embodiment, the hood 1 has an internal discharge cavity 11 inside the hood 1, and the hood 1 has an opening at the top of the hood 1 that communicates with the internal discharge cavity 11. The opening serves as a heat outlet port 12, that is, the hot air flow exiting from the exhaust pipe 4 flows out of the heat outlet port 12 after passing through the internal discharge cavity 11 of the hood 1. The hood 1 has a rectangular hollow structure as a whole, and the seat body 2 is fixedly connected to an inner wall at a central location of the hood 1. The tip of the exhaust pipe 4 is directed toward the top opening of the hood 1, so that the hood 1 can play a guiding role for the high-temperature gas generated by the injector, and finally, the high-temperature gas exits from the heat outlet port 12 of the hood 1.Typically, the hood 1 is arranged vertically, and the ejection tube 4 is also arranged vertically, and the hood 1 is provided with a through hole on the side through which an external gas source can enter and connect to the gas inlet channel 21. In addition, the seat body 2 and the ejection tube 4 are usually located in the center or lower part of the hood 1, so that the hot gas stream ejected from the flamethrower 6 can flow along the inner guide cavity 11 to the heat outlet port 12, which accelerates the ejection speed and ejection intensity.

[0019] The upper opening of the hood 1 is the heat outlet opening 12 and the bottom is open as the gas inlet opening 13, so that the cold ambient air enters the inner discharge cavity 11 through the gas inlet opening 13 and there is a height difference between the inner discharge cavity 11 and the floor along the vertical overhanging setting.

[0020] It should be noted that the inner discharge cavity 11 of the hood 1 may have a rectangular, cylindrical or conical shape, forming a channel-like inner cavity to concentrate the hot air flow ejected from the flamethrower 6 and direct it to the heat outlet opening 12.

[0021] When the hood 1 is installed vertically, the plurality of discharge pipes 4 are distributed parallel to each other and side by side at the same height near the lower portion of the inner discharge cavity 11, that is, the plurality of discharge pipes 4 are distributed along the longitudinal direction of the inner discharge cavity 11, wherein the cross-sectional shape of the inner discharge cavity 11 is a rectangle.

[0022] The present invention is not limited to the best mode described above, and any person may derive various other forms of products under the inspiration of the present invention, but regardless of changes in their shapes or structures, all products having the same or similar technical solutions as those of the present application fall within the scope of the present invention. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 103216830A

[0002]

Claims

[1] Heat flow grill burner, characterized by that it includes: a hood (1), the hood (1) being provided with an inner discharge cavity (11), a heat outlet opening (12) being formed on the top of the hood (1) which is connected to the inner discharge cavity (11), and the hood (1) being provided with a gas inlet opening (13) which is connected to the inner discharge cavity (11); a seat body (2), wherein the seat body (2) is arranged within the inner discharge cavity (11) of the hood (1) and the seat body (2) is provided with nozzles (3); an ejection tube (4), wherein the ejection tube (4) is arranged in the inner discharge cavity (11) of the hood (1) and the ejection tube (4) is arranged above the nozzle (3) on the seat body (2), wherein the inner cavity of the ejection tube (4) has a rotating body structure, wherein a combustion opening (44) is formed on the top of the ejection tube (4) and faces the heat outlet opening (12) of the hood (1); a flamethrower (6), wherein the flamethrower (6) is arranged at the combustion opening (44) of the ejection tube (4), wherein the inner cavity of the flamethrower (6) comprises a pressure expansion section (61) remote from the ejection tube (4) and a constriction section (62) located near the ejection tube (4), wherein the pressure expansion section (61) has a tendency to gradually expand from one end near the ejection tube (4) to the other end remote from the ejection tube (4), so that the opening diameter of the end near the ejection tube (4) on the pressure expansion section (61) is smaller than the opening diameter of the other end remote from the ejection tube (4), and wherein the constriction section (62) has a tendency to gradually expand from one end near the pressure expansion section (61) to the other end remote from the pressure expansion section (61). to expand,such that the opening diameter of the end on the constriction section (62) near the pressure expansion section (61) is smaller than the opening diameter of the other end remote from the expansion section (61), wherein a plurality of through holes (64) are arranged on the inner wall of the flamethrower (6), wherein the plurality of through holes (64) are arranged in a circular arrangement, wherein the two end openings of each of the through holes (64) are arranged on the inner wall of the constriction section (62) and on the inner wall of the pressure expansion section (61), respectively. [2] Heat flow grill burner according to claim 1, characterized bythat the inner cavity of the ejection tube (4) comprises a collecting section (41) near the nozzle (3) and an expanded section (43) remote from the nozzle (3), wherein the collecting section (41) has a tendency to gradually narrow from one end near the nozzle (3) to the other end remote from the nozzle (3), so that the opening diameter of the end of the collecting section (41) near the nozzle (3) is larger than the opening diameter of the other end remote from the nozzle (3), wherein the expanded section (43) has a tendency to gradually expand from one end near the collecting section (41) to the other end remote from the collecting section (41), so that the opening diameter of the end near the collecting section (41) on the expanded section (43) is smaller than the opening diameter of the other end remote from the collecting section (41),and wherein on the upper side of the extension section (43) a combustion opening (44) is formed which points towards the heat outlet opening (12) of the hood (1);, [3] Heat flow grill burner according to claim 2, characterized by in that the inner cavity of the ejection tube (4) further comprises a transition section (42), wherein the transition section (42) is arranged between the collecting section (41) and the extension section (43), and the transition section (42), the collecting section (41) and the extension section (43) are arranged in communication with one another. [4] Heat flow grill burner according to claim 3, characterized by that the transition section (42) is a section with the same diameter. [5] Heat flow grill burner according to claim 2, characterized byin that the flamethrower (6) is provided with a tooth-shaped structure (5), a flamethrower opening and a connecting opening, wherein the flamethrower opening (6) is arranged at a large-opening-diameter end of the pressure-expansion section (61), wherein the tooth-shaped structure (5) is arranged uniformly along the flamethrower opening in a circle, and wherein the connecting opening is arranged at a large-opening-diameter end of the constriction section (62) and is connected to an opening at the other end of the extension section (43). [6] Heat flow grill burner according to claim 5, characterized bythat a neck opening (63) is formed at the junction of the pressure expansion section (61) and the constriction section (62), wherein the neck opening (63) is provided with a separating screen structure (8), wherein the opening diameter of the neck opening (63) is smaller than the opening diameter of the other end of the pressure expansion section (61) remote from the extension section (43) and the opening diameter of the end of the constriction section (62) near the pressure expansion section (61). [7] Heat flow grill burner according to claim 6, characterized by that the length dimension of the pressure expansion section (61) is smaller than the length dimension of the constriction section (62) and the gradual inclination of the constriction section (62) is smaller than the gradual inclination of the pressure expansion section (61). [8] Heat flow grill burner according to claim 1, characterized bythat the number of ejection pipes (4) is more than two and more than two of the ejection pipes (4) are arranged side by side, and that the number of nozzles (3) is equal to the number of ejection pipes (4) and the position of each of the nozzles (3) is arranged in mutual agreement with the position of each of the two or more ejection pipes (4). [9] Heat flow grill burner according to claim 8, characterized by that two gas inlet channels (21) are arranged in the seat body (2), and that when the two gas inlet channels (21) are not connected to each other, one of the nozzles (3) is connected to one of the gas inlet channels (21) to eject gas only from the nozzle (3), and the other gas inlet channel (21) is connected to the remaining at least one nozzle (3) to eject gas from the remaining nozzle (3). [10] Heat flow grill burner according to claim 1, characterized bythat the discharge pipes (4) are distributed parallel to each other and next to each other at the same height near the bottom region of the inner discharge cavity (11), wherein the inner discharge cavity (11) has a rectangular cross-sectional shape.

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