A high-efficiency barbecue grill for outdoor use with hot air circulation

Abstract

The invention discloses a high-efficiency barbecue grill for hot air circulation outdoor, comprising a frame, an oven and a grill, wherein a material box for holding burning granular materials, an automatic feeding auger, a burner and an exhaust mechanism are provided on the frame, an air outlet is provided on the upper side wall of the burner, an upper baking bin and a lower baking bin are respectively provided above and below the grill in the oven; a lower air duct, an upper air duct, an air inlet duct, an air outlet duct and an exhaust duct for hot air circulation are provided on the inner walls of the lower box body and the upper box body, and a control panel for controlling the feeding start and feeding time of the automatic feeding auger and the start of the exhaust motor is provided on the frame; the invention utilizes the automatic feeding mechanism to enable the burner to burn continuously, and air ducts are provided on the upper and lower inner walls of the oven, and the hot air in the burner is circulated above and below the grill in the oven through the exhaust mechanism and the air duct, so as to grill the food, thereby achieving the purposes of saving manpower, automatically controlling the grilling time, reducing costs and achieving high thermal energy utilization rate.

Description

Technical Field

[0001] The invention belongs to the technical field of outdoor baking devices and racks for baking whole meat, and particularly relates to a high-efficiency outdoor barbecue rack for hot air circulation. Background Art

[0002] Barbecue is a process of heating and drying air using fuel, and then placing food in the hot, dry air near a heat source to heat the food. Nowadays, barbecue grills and grills are widely used tools for barbecue. Currently, electric barbecue grills, electric grills, charcoal barbecue grills, and charcoal grills used outdoors are expensive and have low heat conversion rates. In particular, electric barbecue grills and electric grills require a large amount of electricity and are difficult to connect to the power supply, which can easily lead to poor outdoor operation. Charcoal barbecue grills and charcoal grills consume a large amount of smokeless barbecue charcoal and ordinary charcoal during use. A barbecue can require several pounds or even more than ten pounds of smokeless barbecue charcoal and ordinary charcoal. Ordinary charcoal not only easily produces a large amount of ash, but also has low thermal efficiency, burns quickly, and has a short barbecue time, requiring additional charcoal during the barbecue process. Smokeless barbecue charcoal is expensive, burns quickly, and has a long barbecue time. It is often the case that the smokeless barbecue charcoal still has heat after barbecue, and is finally extinguished and discarded. In addition, when using charcoal barbecue grills and charcoal grills, the barbecue operator must always pay attention to the flame size to prevent the food from burning.

[0003] Therefore, it is necessary to provide a barbecue device with high efficiency, low cost, unattended operation and automatic feeding. Summary of the Invention

[0004] The present invention provides a high-efficiency barbecue grill for hot air circulation outdoor use. The high-efficiency barbecue grill for hot air circulation outdoor use is provided with an automatic feeding mechanism, a burner, an exhaust mechanism and an oven. The automatic feeding mechanism is used to enable the burner to continuously burn. Air ducts are provided on the upper and lower inner walls of the oven. The exhaust mechanism and the air ducts circulate the hot air in the burner to the upper and lower grills in the oven to grill food, thereby saving manpower, automatically controlling the grilling time, reducing costs, and achieving high thermal energy utilization.

[0005] In order to solve the above technical problems, the present invention provides a high-efficiency outdoor barbecue grill for hot air circulation, comprising a frame, an oven arranged on the frame, and a grill arranged in the oven and used to hold food, wherein the frame is provided with a material box for holding burning pellets, the bottom of the material box is provided with an automatic feeding auger connected thereto, the outlet end of the automatic feeding auger is provided with a burner, and the upper side wall of the burner is provided with an air outlet.

[0006] The oven comprises a lower box body and an upper box body hinged to the inner side of the lower box body, the grill is arranged on the lower box body, and an upper baking bin and a lower baking bin are respectively arranged above and below the grill in the oven;

[0007] The inner side wall of the lower box body is provided with a lower air duct connected to the air outlet, the inner side wall of the upper box body is provided with an upper air duct connected to the lower air duct, and the inner side wall of the upper box body is evenly distributed with ventilation holes connecting the upper air duct and the upper baking bin;

[0008] An air inlet duct is provided in the outer side wall of the upper box body, and ventilation holes I are evenly distributed on the outer side wall of the upper box body to connect the upper baking bin and the air inlet duct;

[0009] The oven is provided with an exhaust mechanism on the other side away from the burner, the exhaust mechanism comprising an exhaust chamber, an exhaust chamber, and blades arranged between the exhaust chamber and the exhaust chamber, the blades being connected to an exhaust motor, and an air inlet slot being connected between the air inlet duct and the exhaust chamber;

[0010] An air outlet is further provided in the inner side wall of the lower box body, an air exhaust slot is connected between the air outlet and the air exhaust bin, and ventilation holes II are uniformly distributed on the inner side wall of the lower box body, connecting the air outlet and the lower baking bin;

[0011] An exhaust duct is provided in the outer side wall of the lower box body, and ventilation holes III connecting the lower baking bin and the exhaust duct are distributed on the outer side wall of the lower box body. An exhaust chimney connected to the end of the exhaust duct is provided on the lower box body;

[0012] The frame is provided with a control panel for controlling the start of the automatic feeding auger feeding, the feeding time and the start of the exhaust motor.

[0013] Furthermore, the control screen is configured as a touch screen, and the control screen is disposed on the side wall of the material box.

[0014] Furthermore, a material box cover for adding materials is provided on the top of the material box, a conical hopper is provided at the bottom of the material box, and a feeding chute connected to an automatic feeding auger is provided at the bottom of the conical hopper.

[0015] Furthermore, the automatic feeding auger includes a feeding frame, a rotating shaft mounted in the feeding frame, spiral blades wrapped around the rotating shaft, and a feeding motor located at the other end of the feeding frame away from the burner and fixedly connected to the rotating shaft. The rotating shaft is provided with a bearing at one end close to the motor, and the other end is mounted on the feeding frame through a wear-resistant sleeve. A discharge trough for communicating with the burner is provided at the lower part of the end of the feeding frame close to the burner.

[0016] Furthermore, the automatic feeding auger is arranged horizontally, a baffle plate is provided on the rotating shaft between the spiral blade and the bearing, a support frame is provided at the feeding frame near the end of the burner, the discharge trough is located between the support frame and the feeding frame, and a mounting hole for fixing the wear-resistant sleeve is provided at the center of the support frame.

[0017] Furthermore, the burner includes a cylinder, a material receiving platform arranged at the lower part of the cylinder and an electric igniter located in the middle of the material receiving platform. A feed port connected to the discharge chute is provided on the side wall of the cylinder above the material receiving platform.

[0018] Furthermore, a ash powder collection tray is provided at the bottom of the material receiving platform, air inlet holes are distributed around the material receiving platform near the electric igniter, an obliquely arranged ash discharge trough is provided below the air inlet hole in the material receiving platform, and ventilation holes are provided on the side wall of the cylinder below the material receiving platform.

[0019] Furthermore, the upper grill cover includes an outer semicircular plate, a middle semicircular plate and an inner semicircular plate connected to each other, the upper air duct and the air inlet duct are both surrounded by the outer semicircular plate, the middle semicircular plate and the inner semicircular plate, and the ventilation holes and ventilation holes I are respectively distributed on both sides of the inner semicircular plate.

[0020] Furthermore, a handle is provided on the outer side wall of the upper grill cover, and a storage rack is provided on the side wall of the frame close to the burner.

[0021] Furthermore, the exhaust motor is arranged in the frame and is located diagonally below the oven. The exhaust mechanism also includes a mounting frame. A blade shaft and a driven sprocket located at one end of the blade are arranged in the top of the mounting frame. The blade is installed at the other end of the blade shaft extending out of the mounting frame. The exhaust motor is connected to a driving sprocket, and a chain is arranged between the driving sprocket and the driven sprocket.

[0022] The beneficial effects of the present invention are:

[0023] The present invention discloses a high-efficiency outdoor barbecue grill for hot air circulation, which is provided with an automatic feeding mechanism, a burner, an exhaust mechanism and an oven. The automatic feeding mechanism is used to enable the burner to continuously burn, and air ducts are provided on the upper and lower inner walls of the oven. The exhaust mechanism and the air ducts circulate the hot air in the burner to the upper and lower grills in the oven to grill food, thereby saving manpower, automatically controlling the grilling time, reducing costs, and achieving a high thermal energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic structural diagram of a high-efficiency outdoor barbecue grill for hot air circulation according to the present invention;

[0025] FIG2 is a side view of a high-efficiency outdoor barbecue grill for hot air circulation according to the present invention;

[0026] FIG3 is a side cross-sectional view of a high-efficiency outdoor barbecue grill for hot air circulation according to the present invention;

[0027] FIG4 is a schematic structural diagram of an upper grill cover in a high-efficiency outdoor grill for hot air circulation according to the present invention;

[0028] FIG5 is a schematic structural diagram of an automatic feeding auger for a high-efficiency outdoor barbecue grill with hot air circulation according to the present invention;

[0029] FIG6 is a schematic structural diagram of a combustion mechanism in a high-efficiency outdoor barbecue grill with hot air circulation according to the present invention;

[0030] FIG. 7 is a schematic diagram showing the temperature detection of the upper and lower grilling chambers in a high-efficiency outdoor grill with hot air circulation according to the present invention.

[0031] Figure 1: Frame; 2: Oven; 3: Material box; 4: Control panel; 5: Automatic feeding auger; 6: Burner; 7: Air outlet; 8: Electric igniter; 9: Support leg; 10: Storage rack; 11: Upper box; 12: Handle; 13: Exhaust chimney; 14: Exhaust motor; 15: Blade; 16: Grill; 17: Feeding motor; 18: Lower air duct; 19: Upper air duct; 20: Air inlet; 21: Air outlet; 22: Exhaust duct; 23: Lower baking chamber; 24: Upper baking chamber; 25: Air inlet; 26: Hinge Shaft; 27. Outer semicircular plate; 28. Middle semicircular plate; 29. ​​Inner semicircular plate; 30. Feed chute; 31. Feed rack; 32. Bearing; 33. Support frame; 34. Wear-resistant sleeve; 35. Discharge chute; 36. Baffle plate; 37. Material box cover; 38. Feed port; 39. Material receiving platform; 40. Ash discharge chute; 41. Ash powder collecting tray; 42. Air inlet; 43. Exhaust bin; 44. Exhaust bin; 45. Air inlet I; 46. Air inlet II; 47. Air inlet III; 48. Rotating shaft; 49. Spiral blade. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] like Figure 1-6 A schematic diagram of the structure of a high-efficiency outdoor barbecue grill for hot air circulation proposed by the present invention. The high-efficiency outdoor barbecue grill for hot air circulation of the present invention includes a frame 1, an oven 2 arranged on the frame 1, and a grill 16 arranged in the oven 2 and used to hold food. A material box 3 for holding combustible pellets is provided on the frame 1. An automatic feeding auger 5 connected to the bottom of the material box 3 is provided. A burner 6 is provided at the outlet end of the automatic feeding auger 5. An air outlet 7 is provided on the upper side wall of the burner 6.

[0034] The oven 2 includes a lower box body and an upper box body 11 hinged to the side wall of the lower box body. The grill 16 is arranged on the lower box body. The upper baking chamber 24 and the lower baking chamber 23 are respectively arranged above and below the grill in the oven 2.

[0035] A lower air duct 18 communicating with the air outlet 7 is provided in the inner side wall of the lower box body, an upper air duct 19 communicating with the lower air duct 18 is provided in the inner side wall of the upper box body 11, and air inlet holes 25 communicating with the upper air duct 19 and the upper baking chamber 24 are evenly distributed on the inner side wall of the upper box body 11;

[0036] An air inlet duct 20 is provided in the outer side wall of the upper box body 11, and air inlet holes 145 are evenly distributed on the outer inner wall of the upper box body 20 to connect the upper baking chamber 24 and the air inlet duct 20;

[0037] An exhaust mechanism is provided on the other side of the oven 2 away from the burner 6. The exhaust mechanism includes an exhaust chamber 43, an exhaust chamber 44, and a blade 15 provided between the exhaust chamber 43 and the exhaust chamber 44. The blade 15 is connected to the exhaust motor 14. An air inlet slot is connected between the air inlet duct 20 and the exhaust chamber.

[0038] An air outlet duct 21 is further provided in the inner side wall of the lower box body. An exhaust slot is connected between the air outlet duct 21 and the exhaust bin 44. Air inlet holes II46 connecting the air outlet duct 21 and the lower baking bin 23 are evenly distributed on the inner wall of the lower box body.

[0039] An exhaust duct 22 is provided in the outer side wall of the lower box body. Air inlet holes III47 are evenly distributed on the outer side wall of the lower box body, connecting the lower baking bin 23 and the exhaust duct 22. An exhaust chimney 13 is provided on the lower box body, which is connected to the end of the exhaust duct.

[0040] The frame 1 is provided with a control panel 4 for controlling the start of the automatic feeding auger 5, the feeding time and the start of the exhaust motor.

[0041] This embodiment is provided with an automatic feeding mechanism, a burner, an exhaust mechanism and an oven. The automatic feeding mechanism is used to enable the burner to burn continuously. Air ducts are provided on the upper and lower inner walls of the oven. The exhaust mechanism and the air ducts circulate the hot air in the burner to the upper and lower grills in the oven to grill the food, thereby saving manpower, automatically controlling the grilling time, reducing costs, and achieving high thermal energy utilization.

[0042] When grilling outdoors in this embodiment, the oven 2 is first opened, and the food is placed on the grill in sequence. Then the oven 2 is closed, the burner generates heat, and the hot air flow, under the action of the exhaust motor 14 and the blades, passes through the air outlet 7, the lower air duct 18, the upper air duct 19, the air inlet 25, the upper grilling bin 24, the air inlet I45, the air inlet duct 20, the air inlet slot, the exhaust bin 43, the exhaust bin 44, the exhaust slot, the air outlet 21, the air inlet II46, the lower grilling bin 23, the air inlet III47, the exhaust duct 22 and the exhaust chimney 13 in sequence, so that the hot air circulates up and down the grill in the oven, thereby grilling the food.

[0043] During the implementation of this embodiment, the combustion pellets are biomass wood pellets, which do not form coke and produce little ash powder, and the cost is 800 yuan / ton. The combustion pellets used in this embodiment have a cylindrical structure, with a length of 8-10 mm and a diameter of 4-8 mm. The material consumption is 3-4 kg / h, which is reduced to 5-6 yuan / hour compared with smokeless charcoal for barbecue and ordinary charcoal. The barbecue cost is low, automatic control is used, and pollution is less.

[0044] During the implementation of this embodiment, it can be measured through temperature detection that the combustion temperature in the burner can reach 250°C. Through hot air circulation, the temperature in the upper baking chamber 24 in the oven is basically 110-120°C, and the temperature in the lower baking chamber 23 is 80-100°C. In order to avoid burns, a protective plate is provided around the oven to isolate the temperature in the oven, and the surface temperature of the oven is 60-70°C.

[0045] During the implementation of this embodiment, the temperature of the upper baking chamber 24 and the lower baking chamber 23 is gradually increased. Figure 7 As shown, it takes nearly 3 minutes for the temperature in the upper baking chamber 24 to reach 120°C, and it takes nearly 4 minutes for the temperature in the lower baking chamber 23 to reach 100°C. When baking vegetables, it takes 6-8 minutes, and when baking meat products, it takes 12-15 minutes.

[0046] In a preferred embodiment, the control panel 4 is configured as a touch screen, and the control panel is disposed on the side wall of the material box 3. During the implementation of this embodiment, the material box and the oven are separated and independent of each other, and the control panel is disposed on the material box 3, which has a compact structure and avoids the high temperature of the oven affecting the service life of the circuit components in the control panel 4.

[0047] In a preferred embodiment, a material box cover 37 for adding materials is provided on the top of the material box 3, a conical hopper is provided at the bottom of the material box, and a feed chute 30 connected to the automatic feeding auger is provided at the bottom of the conical hopper. This structure of the present embodiment facilitates automatic discharge of the material box 3, and combined with the automatic feeding auger, the purpose of continuous feeding is achieved.

[0048] In a preferred embodiment, the automatic feeding auger 5 includes a feeding frame 31, a rotating shaft 48 mounted in the feeding frame 31, a spiral blade 49 wound on the rotating shaft 48, and a feeding motor 17 located at the other end of the feeding frame 31 away from the burner 6 and fixedly connected to the rotating shaft 48. The rotating shaft 48 is provided with a bearing 32 at one end close to the feeding motor 17, and the other end is mounted on the feeding frame 31 through a wear-resistant sleeve 34. A discharge chute 35 for communicating with the burner 6 is provided at the lower part of the end of the feeding frame 31 close to the burner 6. During the implementation of the structure of this embodiment, the burning pellets in the material box 3 are used to enter the inlet of the automatic feeding auger 5, and the feeding motor 17 rotates to drive the burning pellets along the discharge chute 35 of the automatic feeding auger 5 into the burner 6 to be burned, and the smoke generated by the combustion enters the oven for circulation, thereby achieving the purpose of automatic grilling.

[0049] In a preferred embodiment, the automatic feeding auger 5 is arranged horizontally, and a material baffle 36 is provided on the rotating shaft 48 between the spiral blade 39 and the bearing, and a support frame 33 is provided at the end of the feeding frame 31 near the burner 6, and the discharge chute 35 is located between the support frame 33 and the feeding frame 31, and a mounting hole for fixing the wear-resistant sleeve 34 is provided at the center of the support frame 33. During the implementation of this embodiment, a bearing 32 is provided at one end of the rotating shaft 48 and a wear-resistant sleeve 34 is provided at the other end, which is beneficial to reducing the friction when the rotating shaft 48 rotates, and the high temperature resistance of the wear-resistant sleeve is used to improve the working service life of the automatic feeding auger 5.

[0050] In a preferred embodiment, the burner 6 includes a cylinder, a material receiving platform 39 arranged at the lower part of the cylinder and an electric igniter 8 located in the middle of the material receiving platform 39. A feed port 38 connected to the discharge chute is provided on the side wall of the cylinder above the material receiving platform. During the implementation of this embodiment, the combustion particles enter the cylinder through the feed port 38 and are stacked on the material receiving platform 39. After the electric igniter 8 is ignited, the combustion particles burn after ignition. The electric igniter 8 automatically turns off the fire after the particles burn. The smoke generated after the combustion of the combustion particles enters the oven for circulation, and is continuously fed through the automatic feeding auger 5 to keep the combustion particles burning, thereby achieving the purpose of continuously providing hot smoke to the oven.

[0051] In a preferred embodiment, an ash collecting tray 41 is provided at the bottom of the material receiving platform 39, and air vents are evenly distributed around the material receiving platform 39 near the electric igniter 8. An obliquely arranged ash discharge trough 40 is provided below the air inlet in the material receiving platform 39, and an air inlet 42 is provided on the side wall of the cylinder below the material receiving platform. The structure of this embodiment avoids environmental pollution by providing an ash collecting tray 41, and at the same time utilizes the air inlet 42 and the air vent to conveniently provide oxygen to the burner 6, thereby avoiding the burner 6 from being extinguished due to lack of oxygen.

[0052] In a preferred embodiment, the upper box body 11 includes an outer semicircular plate 27, a middle semicircular plate 28 and an inner semicircular plate 29 which are connected to each other. The upper air duct 19 and the air inlet duct 20 are both surrounded by the outer semicircular plate 27, the middle semicircular plate 28 and the inner semicircular plate 29. The air inlet holes 25 and the air inlet holes I45 are respectively distributed on both sides of the inner semicircular plate 29. This structure of the present embodiment makes the air duct structure in the upper box body 11 compact, easy to process and low in cost.

[0053] In a preferred embodiment, a handle 12 is provided on the outer side wall of the upper box body 11, and a storage rack 10 is provided on the side wall of the frame 1 close to the burner. In this embodiment, the structure uses the handle 12 to facilitate opening the oven, and uses the storage rack 10 to facilitate placing food on the barbecue grill, making the function of the barbecue grill more complete.

[0054] In a preferred embodiment, the exhaust motor 14 is arranged in the frame and is located diagonally below the oven. The exhaust mechanism also includes a mounting frame. A blade shaft and a driven sprocket located at one end of the blade are arranged in the top of the mounting frame. The blade is installed at the other end of the blade shaft extending out of the mounting frame. The exhaust motor is connected to a driving sprocket, and a chain is provided between the driving sprocket and the driven sprocket. The structure of this embodiment can prevent the high-temperature flue gas from damaging the exhaust motor 14, and utilizes chain drive to transmit the power of the exhaust motor to the oven. While ensuring the circulation of high-temperature flue gas, the working life of the exhaust motor is improved.

[0055] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and utility model concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high-efficiency outdoor barbecue grill with hot air circulation, comprising a frame, an oven mounted on the frame, and a grill mounted in the oven for holding food, characterized in that: The frame is provided with a material box for containing combustion granular materials, the bottom of the material box is provided with an automatic feeding auger connected thereto, the outlet end of the automatic feeding auger is provided with a burner, and the upper side wall of the burner is provided with an air outlet. The oven comprises a lower box body and an upper box body hinged to the inner side of the lower box body, the grill is arranged on the lower box body, and an upper baking bin and a lower baking bin are respectively arranged above and below the grill in the oven; The inner side wall of the lower box body is provided with a lower air duct connected to the air outlet, the inner side wall of the upper box body is provided with an upper air duct connected to the lower air duct, and the inner side wall of the upper box body is evenly distributed with ventilation holes connecting the upper air duct and the upper baking bin; An air inlet duct is provided in the outer side wall of the upper box body, and ventilation holes I are evenly distributed on the outer side wall of the upper box body to connect the upper baking bin and the air inlet duct; The oven is provided with an exhaust mechanism on the other side away from the burner, the exhaust mechanism comprising an exhaust chamber, an exhaust chamber, and blades arranged between the exhaust chamber and the exhaust chamber, the blades being connected to an exhaust motor, and an air inlet slot being connected between the air inlet duct and the exhaust chamber; An air outlet is further provided in the inner side wall of the lower box body, an air exhaust slot is connected between the air outlet and the air exhaust bin, and ventilation holes II are uniformly distributed on the inner side wall of the lower box body, connecting the air outlet and the lower baking bin; An exhaust duct is provided in the outer side wall of the lower box body, and ventilation holes III connecting the lower baking bin and the exhaust duct are distributed on the outer side wall of the lower box body. An exhaust chimney connected to the end of the exhaust duct is provided on the lower box body; The frame is provided with a control panel for controlling the start of the automatic feeding auger feeding, the feeding time and the start of the exhaust motor; The control screen is configured as a touch screen, and the control screen is disposed on the side wall of the material box; The upper box body includes an outer semicircular plate, a middle semicircular plate and an inner semicircular plate which are connected to each other. The upper air duct and the air inlet duct are both surrounded by the outer semicircular plate, the middle semicircular plate and the inner semicircular plate. The ventilation holes and ventilation holes I are respectively distributed on both sides of the inner semicircular plate.

2. The high-efficiency outdoor barbecue grill with hot air circulation according to claim 1, characterized in that: The top of the material box is provided with a material box cover for adding materials, the bottom of the material box is provided with a conical hopper, and the bottom of the conical hopper is provided with a feeding chute connected with an automatic feeding auger.

3. A high-efficiency outdoor barbecue grill with hot air circulation according to claim 1 or 2, characterized in that: The automatic feeding auger includes a feeding frame, a rotating shaft mounted in the feeding frame, a spiral blade wound on the rotating shaft, and a feeding motor located at the other end of the feeding frame away from the burner and fixedly connected to the rotating shaft. The rotating shaft is provided with a bearing at one end close to the motor, and the other end is mounted on the feeding frame through a wear-resistant sleeve. A discharge trough for communicating with the burner is provided at the lower part of the end of the feeding frame close to the burner.

4. The high-efficiency outdoor barbecue grill with hot air circulation according to claim 3, characterized in that: The automatic feeding auger is arranged horizontally, a baffle is provided on the rotating shaft between the spiral blade and the bearing, a support frame is provided at the feeding frame near the end of the burner, the discharge trough is located between the support frame and the feeding frame, and a mounting hole for fixing the wear-resistant sleeve is provided at the center of the support frame.

5. The high-efficiency outdoor barbecue grill with hot air circulation according to claim 4, characterized in that: The burner includes a cylinder, a material receiving platform arranged at the lower part of the cylinder and an electric igniter located in the middle of the material receiving platform. A feed port connected to a discharge chute is arranged on the side wall of the cylinder above the material receiving platform.

6. The high-efficiency outdoor barbecue grill with hot air circulation according to claim 5, characterized in that: An ash powder collecting tray is provided at the bottom of the material receiving platform, and air inlet holes are evenly distributed around the material receiving platform near the electric igniter. An obliquely arranged ash discharge trough is provided below the air inlet hole in the material receiving platform, and ventilation holes are provided on the side wall of the cylinder below the material receiving platform.

7. The high-efficiency outdoor barbecue grill with hot air circulation according to claim 1, characterized in that: A handle is provided on the outer side wall of the upper box body, and a storage rack is provided on the side wall of the frame close to the burner.

8. The high-efficiency outdoor barbecue grill with hot air circulation according to claim 1, characterized in that: The exhaust motor is arranged in the frame and is located obliquely below the oven. The exhaust mechanism also includes a mounting frame. A blade shaft and a driven sprocket located at one end of the blade are arranged in the top of the mounting frame. The blade is mounted on the other end of the blade shaft extending out of the mounting frame. The exhaust motor is connected to a driving sprocket, and a chain is arranged between the driving sprocket and the driven sprocket.

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