Double-fan air supply type barbecue oven

Abstract

The utility model relates to a double-fan air supply type barbecue oven which comprises a barbecue oven body and an air supply cavity. The gas supply chamber comprises a gas flux regulating valve, two paths of gas supply branch pipes communicated with the gas flux regulating valve, premixing spray heads connected with the end parts of the gas supply branch pipes respectively, a first fan arranged in the gas supply chamber and a second fan arranged on the side wall of the gas supply chamber; the design that the independent double fans are adopted in the air supply chamber to supply air to the fire grate combustor and the combustion position of the furnace cavity is adopted, the fire grate and the furnace cavity supply air independently to avoid mutual interference of airflow, the double fans can independently adjust the air supply amount and pressure, and the problem of fire grate backfire caused by insufficient oxygen supply of a single fan is avoided; compared with full-power operation of a single fan, the two fans are adopted for independently supplying air to the fire grate combustor or the combustion position of the furnace chamber, abrasion of bearings and blades in the using process of the fans can be effectively reduced, and the service life of the fans is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of barbecue grill gas supply technology, and in particular to a dual-fan gas supply barbecue grill. Background Technology

[0002] Gas-fired barbecue grills are cooking devices that use natural gas or liquefied petroleum gas (LPG) as fuel. They heat food by burning gas, eliminating the need for lighting charcoal like traditional grills. Simply connect the gas canister and turn it on to use. They are more economical than electric grills, consuming less energy than traditional charcoal or electric grills. Gas-fired barbecue grills allow for quick heat control via adjustable valves, producing smoke and dust during combustion, reducing environmental pollution. They are also equipped with safety devices such as flameout protection and pressure-resistant valves to minimize the risk of leaks or accidental flameout. Suitable for various scenarios including outdoor barbecues, family gatherings, and commercial kitchens, gas-fired barbecue grills are increasingly favored by consumers.

[0003] Currently, most gas-fired barbecue grills are designed with a single fan to supply air to both the burner and the combustion chamber. While this simplifies the structure, it presents several potential problems: A single fan must simultaneously meet the ignition needs of the burner and the combustion chamber's needs, which can easily lead to an imbalance in the gas-air mixture ratio. This can result in incomplete combustion in the burner or excessive oxygen supply to the chamber, affecting overall combustion efficiency. Insufficient fan pressure can also cause backfire or localized high temperatures in the burner, increasing the risk of emissions of harmful gases such as carbon monoxide. Furthermore, to cover the dual-zone air supply needs, the fan requires higher power, increasing gas consumption and electricity costs. This also increases the risk of heat-induced aging of fan components (such as motors and blades), potentially reducing fan efficiency or even causing malfunctions over time. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a dual-fan gas supply barbecue grill.

[0005] This utility model is achieved through the following technical solution:

[0006] A dual-fan gas-supply barbecue grill includes a grill body and gas supply chambers located on one or both sides of the grill body. The grill body includes a furnace cavity and a burner arranged opposite to it. The gas supply chamber includes a gas flow regulating valve, two gas supply branches connected to the gas flow regulating valve, premixed nozzles connected to the ends of the gas supply branches, a first fan located inside the gas supply chamber, and a second fan located on the side wall of the gas supply chamber. A burner air supply hole is provided above the burner. An air supply opening is provided on the upper side of the gas supply chamber. The first fan is installed at the air supply opening and supplies air to the burner air supply hole through the air supply opening. A side cover is provided on the side of the gas supply chamber. An upper air inlet and a lower air inlet are provided on the side cover. The upper air inlet is located close to the first fan. The second fan allows air to enter through the lower air inlet and premix it with the gas at the premixed nozzle.

[0007] According to the above technical solution, preferably, the end of the premixed nozzle extends toward the rear of the burner to supply gas to the burner.

[0008] According to the above technical solution, preferably, the first fan is fixedly connected to a fan outer compartment. When the side cover is closed, the fan outer compartment forms a closed structure with an upper air inlet hole.

[0009] According to the above technical solution, preferably, the inner wall of the air supply chamber is fixedly connected to two side plates, the upper ends of the two side plates are fixedly connected to the top of the air supply chamber, and a bottom plate is fixedly connected between the bottoms of the two side plates. When the side cover is closed, it forms a closed structure with the side plates and the bottom plate.

[0010] According to the above technical solution, preferably, an ignition needle is installed on the side wall of the gas supply chamber, and the end of the ignition needle extends toward and is positioned close to the burner.

[0011] According to the above technical solution, preferably, the gas flow regulating valve is connected to a control knob, and rotating the control knob can simultaneously regulate the gas flow and the speed of the second fan. A solenoid valve is also connected to the gas flow regulating valve.

[0012] The beneficial effects of this utility model are:

[0013] Since the burner requires high concentrations of oxygen to be premixed with the fuel gas at the premixing nozzle to ensure rapid ignition and stable combustion, and the furnace cavity requires an appropriate amount of air to maintain thermal circulation in the combustion zone through the burner air supply port, this application adopts a design that uses independent dual fans in the air supply chamber to supply air to the burner and the combustion area in the furnace cavity separately. Independent air supply to the burner and the furnace cavity avoids mutual interference of airflow. The dual fans can independently adjust the air volume and pressure to avoid the problem of burner backfire caused by insufficient oxygen supply from a single fan.

[0014] Meanwhile, compared with a single fan operating at full power, this application uses two fans to supply air separately to the burner or furnace combustion area, which can effectively reduce the wear of bearings and blades during fan operation and improve the service life of the fans. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the air supply chamber portion of this utility model. Figure 1 .

[0017] Figure 3 This is a three-dimensional structural diagram of the side cover plate portion of this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the gas flow regulating valve part of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the air supply chamber portion of this utility model. Figure 2 .

[0020] Figure 6 This is a partial structural diagram of the barbecue grill body of this utility model.

[0021] Figure 7 This is a three-dimensional structural diagram of the air supply chamber portion of this utility model. Figure 3 .

[0022] Figure 8 This is a three-dimensional structural diagram of the air supply chamber portion of this utility model. Figure 4 .

[0023] Figure 9 This is a three-dimensional structural diagram of the premixed nozzle part of this utility model. Figure 1 .

[0024] Figure 10 This is a three-dimensional structural diagram of the premixed nozzle part of this utility model. Figure 2 .

[0025] Figure 11 This is a schematic diagram of the principle of wind-air linkage in Embodiment 2 of this utility model.

[0026] In the diagram: 1. Gas supply chamber; 2. Burner; 3. Burner air supply port; 4. First fan; 5. Fan outer compartment; 6. Control knob; 7. Gas supply branch pipe; 8. Premix nozzle; 9. Side cover plate; 10. Upper air inlet; 11. Second fan; 12. Gas flow regulating valve; 13. Hollow potentiometer; 14. Mounting plate; 15. Air supply opening; 16. Ignition needle; 17. Premix port; 18. Side plate; 19. Base plate; 20. Lower air inlet. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model 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. Therefore, they should not be construed as limitations on the utility model.

[0029] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1: As shown in the figure, this utility model includes a barbecue grill body and a gas supply chamber 1 located on one or both sides of the barbecue grill body. The barbecue grill body includes a furnace cavity and a burner 2 disposed opposite to it. The gas supply chamber 1 includes a gas flow regulating valve 12, two gas supply branches 7 connected to the gas flow regulating valve 12, premixed nozzles 8 respectively connected to the ends of the gas supply branches 7, a first fan 4 disposed inside the gas supply chamber 1, and a second fan 11 disposed on the side wall of the gas supply chamber 1. The barbecue grill connects to gas externally, and the gas flow regulating valve 12 regulates the gas intake. In this example, the gas flow regulating valve 12 can be a commonly available regulating valve, which adjusts the gas flow by rotation. This is prior art and will not be described in detail in this application. At the same time, an ignition needle 16 is installed on the side wall of the gas supply chamber 1, with the end of the ignition needle 16 extending towards and close to the burner 2.

[0031] The burner 2 has a burner air supply hole 3 above it, and the air supply chamber 1 has an air outlet 15 on its upper side. The first fan 4 is installed at the air outlet 15 and supplies air to the burner air supply hole 3 through the air outlet 15. In this example, the first fan 4 is fixedly connected to a fan outer chamber 5. When the side cover plate 9 is closed, the fan outer chamber 5 forms a closed structure with an upper air inlet 10. Specifically, the inner wall of the air supply chamber 1 is fixedly connected to two side plates 18. The upper ends of the two side plates 18 are fixedly connected to the top of the air supply chamber 1, and the bottom of the two side plates 18 is fixedly connected to a bottom plate 19. When the side cover plate 9 is closed, it forms a closed structure with the side plates 18 and the bottom plate 19. This arrangement optimizes the air duct design to form independent air supply in different zones, which can appropriately reduce the speed of the first fan 4 to match the technical requirement that the furnace cavity needs an appropriate amount of air to maintain the thermal circulation of the combustion zone through the burner air supply hole 3.

[0032] A side cover plate 9 is provided on the side of the gas supply chamber 1, and a second fan 11 is installed on the side cover plate 9. The side cover plate 9 has an upper air inlet 10 and a lower air inlet 20. The upper air inlet 10 is located close to the first fan 4. The second fan 11 allows air to enter through the lower air inlet 20 and premix it with the gas at the premixing port 17 of the premixing nozzle 8. This arrangement allows an independent fan (second fan 11) to supply gas to the burner 2 in the gas supply chamber 1. The speed of the second fan 11 can be controlled independently to meet the technical requirement of the burner 2 to premix the gas with a high concentration of oxygen at the premixing nozzle 8. Combustion performance and equipment reliability are optimized through zoned control.

[0033] Example 2: Based on Example 1 above, preferably, in this application, the gas flow regulating valve 12 is connected to a control knob 6. Rotating the control knob 6 can simultaneously regulate the gas flow and the speed of the second fan 11. The gas flow regulating valve 12 is also connected to a solenoid valve.

[0034] In this example, this implementation method can be achieved through the technical solution of CN217137669U, an integrated adjustment handwheel for a barbecue grill, which integrates the adjustment functions of gas intake volume and fan speed. Those skilled in the art can refer to the prior art to understand how this part of the technical content is implemented, so it will not be elaborated in the solution.

[0035] Example 3: Based on Example 1 above, preferably, as follows: Figure 11 As shown, a mounting plate 14 can also be installed on the gas flow regulating valve 12. A hollow potentiometer 13 is externally connected to the mounting plate 14. The gas flow regulating valve 12 is connected to the control knob 6 via a rotating shaft. When the rotating shaft of the gas flow regulating valve 12 rotates, it drives the hollow potentiometer 13 to rotate. In actual use, while adjusting the gas flow, the rotating shaft changes the resistance of the hollow potentiometer. The microcontroller collects the resistance value of the hollow potentiometer and outputs a PWM signal to the second fan to adjust the fan speed. Specifically, the microcontroller collects the resistance value of the hollow potentiometer, calculates the opening angle of the gas flow regulating valve, and outputs PWM signals of different widths according to the opening angle value to control and adjust the fan speed of the second fan. This setup allows users to adjust the flame (gas flow) and control the combustion intensity (second fan speed) simply by rotating the control knob, simplifying the operation process that originally required multiple knobs. At the same time, the integrated linkage design of this application avoids the disconnect between gas and air supply regulation from a physical structure perspective, and can dynamically maintain the gas-air mixture ratio in the optimal range, avoiding the problem of excess or insufficient oxygen caused by traditional separate regulation, and reducing the risk of flame flickering or backfire.

[0036] In summary, this application employs an independent dual-fan design within the air supply chamber to supply air separately to the burner and the combustion chamber. Independent air supply to the burner and combustion chamber avoids mutual airflow interference. The dual fans can independently adjust the air volume and pressure, preventing backfire problems caused by insufficient oxygen supply from a single fan. Furthermore, compared to a single fan operating at full power, this application uses two fans to supply air separately to the burner or combustion chamber, effectively reducing wear on bearings and blades during fan operation and extending fan lifespan.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A dual-fan gas-supply barbecue grill, comprising a grill body and gas supply chambers (1) located on one or both sides of the grill body, wherein the grill body includes a furnace cavity and burners (2) disposed opposite to each other within the furnace cavity, characterized in that, The gas supply chamber (1) includes a gas flow regulating valve (12), two gas supply branch pipes (7) connected to the gas flow regulating valve (12), premixed nozzles (8) connected to the ends of the gas supply branch pipes (7), a first fan (4) located inside the gas supply chamber (1), and a second fan (11) located on the side wall of the gas supply chamber (1). The burner (2) has an air supply hole (3) above it, and the air supply chamber (1) has an air outlet (15) on its upper side. The first fan (4) is installed at the air outlet (15) and supplies air to the air supply hole (3) through the air outlet (15). A side cover plate (9) is provided on the side of the gas supply chamber (1). An upper air inlet (10) and a lower air inlet (20) are provided on the side cover plate (9). The upper air inlet (10) is located close to the first fan (4). Air is introduced into the lower air inlet (20) through the second fan (11) and premixed with the gas at the premix nozzle (8).

2. The dual-fan gas-supply barbecue grill according to claim 1, characterized in that, The end of the premixed nozzle (8) extends behind the burner (2) to supply gas to the burner (2).

3. The dual-fan gas-supply barbecue grill according to claim 2, characterized in that, The first fan (4) is fixedly connected to a fan housing (5). When the side cover (9) is closed, the fan housing (5) forms a closed structure with an upper air inlet (10).

4. A dual-fan gas-supply barbecue grill according to claim 3, characterized in that, The inner wall of the air supply chamber (1) is fixedly connected to two side plates (18). The upper ends of the two side plates (18) are fixedly connected to the top of the air supply chamber (1), and a bottom plate (19) is fixedly connected between the bottoms of the two side plates (18). When the side cover plate (9) is closed, it forms a closed structure with the side plate (18) and the bottom plate (19).

5. A dual-fan gas-supply barbecue grill according to claim 1, characterized in that, An ignition needle (16) is installed on the side wall of the gas supply chamber (1), and the end of the ignition needle (16) extends toward and is positioned close to the burner (2).

6. A dual-fan gas-supply barbecue grill according to any one of claims 1-5, characterized in that, The gas flow regulating valve (12) is connected to a control knob (6). Rotating the control knob (6) can simultaneously regulate the gas flow and the speed of the second fan (11).

7. A dual-fan gas-supply barbecue grill according to claim 1, characterized in that, A solenoid valve is also connected to the gas flow regulating valve (12).

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