A portable trolley-type smokeless oven

Abstract

This utility model provides a portable trolley-type smokeless grill, relating to the field of barbecue grill technology. The portable trolley-type smokeless grill includes a trolley support, a grill body fixed to the support, an ash collector, and an active air supply assembly. An independent ash collection channel is located at the center of the bottom of the grill body. The active air supply assembly includes an annular air intake chamber surrounding the ash collection channel and a rotatable air duct ring located between the annular air intake chamber and the grill body. The air duct ring has at least two sets of through holes with different configurations along its circumference. By rotating the air duct ring, different sets of through holes can be aligned with the air inlet at the bottom of the grill body, thereby achieving patterned control of the airflow entering the grill chamber to achieve various purposes such as rapid ignition, uniform grilling, or high-temperature roasting. The structure, which separates the air supply system from the ash collection channel, improves reliability, and the active, variable air supply mode enables precise control of the combustion process, improving cooking efficiency and user experience.

Description

Technical Field

[0001] This utility model relates to the field of barbecue grill technology, and in particular to a portable trolley-type smokeless grill. Background Technology

[0002] Portable trolley-style charcoal grills are widely used in home backyards and outdoor camping due to their ease of movement and convenient operating platform. A traditional portable trolley-style charcoal grill typically includes a trolley support, a grill body, and an ash collector. Combustion control primarily relies on dampers located on the top and bottom of the grill body. The amount of natural air intake is controlled by manually adjusting the damper opening, which in turn regulates the burning speed of the charcoal and the temperature inside the grill.

[0003] However, such ovens in the prior art have the following obvious technical drawbacks:

[0004] 1. Low temperature control accuracy and slow response: Relying on natural ventilation, airflow is greatly affected by external environmental factors such as wind force, making precise control difficult. Users cannot quickly and stably achieve specific cooking temperatures, such as prolonged low-temperature slow baking or instantaneous high-temperature roasting, resulting in unstable cooking effects. Simultaneously, temperature adjustment response is sluggish, with a significant delay between adjusting the air damper and the change in oven temperature.

[0005] 2. Low heating efficiency: During the charcoal ignition stage, due to the limited natural air intake, it takes a long time for the charcoal to reach the ideal combustion state, which reduces the user experience.

[0006] 3. Incomplete combustion easily produces smoke: If there is insufficient oxygen supply during the combustion process, the charcoal will undergo incomplete combustion, producing a large amount of smoke, which not only affects the user's comfort but is also unfriendly to the environment.

[0007] Therefore, existing ovens need to be improved to overcome the shortcomings of the current technology. Utility Model Content

[0008] To overcome the problems existing in related technologies, the purpose of this utility model is to provide a portable trolley-type smokeless oven. This portable trolley-type smokeless oven uses an active air supply component that structurally separates the air supply function from the ash collection function. This component uses a rotatable air duct ring with multiple configuration through holes to achieve precise switching of the air supply mode inside the oven, thereby overcoming the technical problems of low temperature control accuracy, slow response, low heating efficiency, and easy generation of smoke due to incomplete combustion in the prior art.

[0009] A portable trolley-type smokeless oven includes:

[0010] A trolley support, wherein the bottom of the trolley support is provided with at least one pair of wheels;

[0011] The furnace body is fixed on the trolley bracket. The furnace body is hemispherical and has a grilling net for placing food on the top. A charcoal rack is provided in the middle of the furnace body. An ash collection channel is provided at the bottom center of the furnace body. The ash collection channel extends downward along the furnace body and has a grille on the top.

[0012] An ash collector is located below the furnace body, directly opposite the ash discharge channel, and is used to collect the ash falling from the furnace body through the ash discharge channel.

[0013] An active air supply assembly includes a fan, an annular air inlet chamber, an air duct, and an air duct ring. The fan is fixed on the trolley bracket, and the air outlet of the fan is connected to the annular air inlet chamber through the air duct. The annular air inlet chamber is located below the furnace body and surrounds the ash collection channel.

[0014] The air duct ring is disposed between the annular air inlet chamber and the furnace body. The air duct ring has at least two sets of through holes with different configurations along its circumference. The furnace body has several air inlets spaced apart circumferentially corresponding to the air duct ring. The air duct ring can rotate relative to the furnace body to selectively connect one set of through holes with the air inlet.

[0015] Furthermore, the at least two sets of through-hole groups with different configurations include:

[0016] The first hole group includes a plurality of first-diameter through holes, the number of which is the same as the number of air inlets;

[0017] The second hole group includes several micro-hole groups, the number of which is the same as the number of air inlets, and each micro-hole group includes a plurality of uniformly distributed second-diameter through holes.

[0018] The size of the first diameter through hole is larger than that of the second diameter through hole.

[0019] By specifically defining the configuration of the through-hole group, the larger diameter through-holes in the first group can create a concentrated airflow during ignition, helping to improve ignition efficiency and shorten preparation time. The micropore design of the second group can disperse the airflow into a uniform flow, providing a stable oxygen supply to the charcoal, suitable for cooking methods that require long-term stable combustion, and helping the food to be heated evenly. This functional design allows users to select the appropriate combustion mode according to their cooking needs, improving the controllability of the cooking process.

[0020] Furthermore, the at least two sets of through-holes with different configurations also include:

[0021] The third group of holes includes several guide holes with inclined guide surfaces.

[0022] By adding a third group of holes with inclined guide surfaces, an airflow pattern that can change the direction of airflow is introduced. When the airflow passes through these guide holes, it is guided into the furnace in a specific direction, forming a rotating hot airflow. This airflow organization method allows heat to be applied more concentratedly to the food, making it suitable for cooking methods that require rapid high temperatures.

[0023] Furthermore, the air duct ring is also provided with a non-perforated closed area. When the closed area is rotated to be aligned with the air inlet, the airflow channel between the annular air inlet chamber and the furnace body is blocked.

[0024] The non-perforated sealing zone on the air duct ring provides a quick function to block bottom air supply and separate the components. When the user needs to stop or reduce combustion, rotating the sealing zone to align with the air inlet will cut off the forced oxygen supply from the fan. At the same time, it protects the annular air intake chamber from carbon ash when the air supply function is not needed.

[0025] Furthermore, the active air supply assembly also includes an operating mechanism, which includes an operating component located on the outside of the furnace body and a transmission mechanism connecting the operating component and the air duct ring. The operating mechanism is used to drive the air duct ring to rotate.

[0026] The movement of this operating component is transmitted to the air duct ring at the bottom of the oven body via a transmission mechanism, driving the air duct ring to rotate. This process aligns the different through-hole groups on the air duct ring with the air inlet of the oven body, thereby switching the air supply mode. This improves the ease of use and operational safety of the product. Users can control the oven's air supply mode from a location away from the heat source via an external operating component, reducing operational complexity and the risk of burns, and improving the user experience.

[0027] Furthermore, the operating element is an operating lever, and an indicator seat is provided on the annular air intake chamber;

[0028] The indicator base is provided with pattern markings corresponding to the different configurations of the through-hole groups;

[0029] When the operating lever is moved to a certain mode indicator position, the transmission mechanism drives the air duct ring to rotate, so that the through hole group corresponding to the mode indicator is connected to the air inlet.

[0030] By setting mode labels on the indicator base corresponding to the functions of each through-hole group, intuitive operation guidance is provided to users. Users only need to move the operation lever to the label position of the desired mode to align the internal air duct ring. This visual correspondence helps reduce misoperation, simplifies operation, and allows users to easily use all the functions of the oven.

[0031] Furthermore, the fan is a DC fan;

[0032] The trolley support is also equipped with a control module, which includes a rechargeable battery pack for powering the fan and a speed controller for adjusting the fan speed.

[0033] Powered by a DC fan and a rechargeable battery pack, it eliminates the need for an external AC power source, improving portability and expanding its application scenarios. The included speed controller allows users to adjust the airflow by regulating the fan speed, thereby further controlling the furnace temperature.

[0034] Furthermore, the ash collection channel includes a cylindrical guide tube, and the upper end of the guide tube is provided with an installation flange for fixing the ash collection channel to the bottom of the furnace body;

[0035] The lower end of the guide tube is provided with a connecting seat, which extends radially outward from the lower end of the guide tube.

[0036] Furthermore, the upper end of the ash collector extends outward radially to form a mating end face, and part of the mating end face is folded inward along a straight line from bottom to top to form a slot, through which the ash collector is engaged with the connecting seat.

[0037] Furthermore, a sealing element is provided between the air duct ring and the annular air inlet chamber, and / or between the air duct ring and the furnace body.

[0038] Adding seals between moving parts improves the airtightness of the air supply system. This helps reduce air leakage along unintended paths, ensuring that the airflow generated by the fan can more effectively enter the furnace through the designated through-hole assembly. Higher airtightness translates to higher air supply efficiency, allowing the fan to achieve the desired combustion effect at lower speeds, while also ensuring airflow isolation between different modes, making the functional definition of each mode clearer.

[0039] The beneficial effects of this utility model are as follows:

[0040] This utility model provides a portable trolley-type smokeless oven. This portable trolley-type smokeless oven separates the active air supply system from the ash collection system spatially by setting up an annular air intake chamber surrounding a central ash collection channel. The user activates a fan fixed to the trolley bracket. The airflow generated by the fan is delivered through an air duct into the annular air intake chamber surrounding the ash collection channel. According to cooking needs, the user rotates the air duct ring, selectively aligning a specific set of through-holes on the air duct ring with the air inlet at the bottom of the oven body. At this time, air in the annular air intake chamber enters the oven body through the aligned through-holes and air inlet in a set airflow pattern, providing controllable oxygen to the charcoal on the charcoal rack. During combustion, the ash produced by the charcoal falls through the grille at the top of the charcoal rack and the ash collection channel, along the ash collection channel located in the center of the oven body and isolated from the air supply system, and is collected by the ash collector below. The structural design improves the system's reliability, avoids the risk of ash clogging the air supply components, and contributes to the long-term stable operation of the system; it achieves effective control of the air supply, and through the rotatable air duct ring, users can actively control the airflow and pattern entering the furnace, providing a basis for realizing multiple combustion modes; it improves combustion conditions, and the active oxygen supply helps the charcoal to burn completely, thus solving to some extent the problems of slow heating, inaccurate temperature control, and smoke generation due to incomplete combustion in traditional ovens. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the portable trolley-type smokeless oven provided in the embodiments of this application;

[0042] Figure 2 This is a cross-sectional schematic diagram of the bottom of the furnace body, the active air supply component, and the ash collector provided in the embodiments of this application;

[0043] Figure 3 This is a partial cross-sectional structural diagram of the active air supply component provided in the embodiments of this application;

[0044] Figure 4 This is a schematic diagram of the bottom air inlet of the furnace body provided in the embodiments of this application;

[0045] Figure 5 This is a schematic diagram of the structure of the air duct ring provided in the embodiments of this application.

[0046] Figure label:

[0047] 100. Cart frame; 110. Wheels;

[0048] 200. Furnace body; 210. Ash collection channel; 211. Flow guide tube; 212. Connecting seat; 220. Air inlet;

[0049] 300. Ash collector;

[0050] 400. Active air supply assembly; 410. Annular air intake chamber; 420. Air duct; 430. Air duct ring; 431. First hole group; 432. Second hole group; 433. Third hole group; 434. Enclosed area; 441. Operating element. Detailed Implementation

[0051] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0052] Example

[0053] like Figures 1 to 5 As shown, this embodiment provides a portable trolley-type smokeless oven, which includes a trolley support 100, an oven body 200 mounted on the trolley support 100, an ash collector 300, and an active air supply assembly 400.

[0054] The trolley support 100 is constructed of metal tubing or profiles, with a pair of wheels 110 on one side of the lower part and fixed support feet on the other side, ensuring ease of movement and stability when placed. The upper platform of the support is used to fix and support the oven body 200, with a shelf extending from one side and a push handle on the other side, which can be integrated with hooks for hanging barbecue tools.

[0055] The oven body 200 has a hemispherical or bowl-shaped metal structure, which facilitates heat circulation inside. Inside the oven body 200, from top to bottom, there is a grill rack for placing food and a charcoal rack for holding charcoal. The charcoal rack is mesh-like, allowing the ash from the burning charcoal to fall downwards.

[0056] At the very center of the bottom of the furnace body 200, there is a circular ash collection port. A cylindrical guide tube 211 serves as the ash collection channel 210, and its upper end is connected to the ash collection port at the bottom of the furnace body 200 via a welding or bolted mounting flange, forming an independent ash falling path vertically downward from the center of the furnace. To prevent large pieces of charcoal or food scraps from accidentally falling in, the top inlet of the ash collection channel 210 is covered with a layer of high-temperature resistant metal grating.

[0057] The lower end of the guide tube 211 extends radially outward to form an annular connecting seat 212. The ash collector 300 is a metal barrel-shaped container with its upper edge folded outward to form a mating end face. To achieve quick assembly and disassembly, part of the mating end face is folded upward and bent inward to form a groove. During installation, align the ash collector 300 upward with the connecting seat 212, rotate it at a certain angle, and make the groove engage with the connecting seat 212, thus securely suspending the ash collector 300 below the ash discharge channel 210.

[0058] The active air supply component 400 separates the air supply function from the dust collection function and can provide multiple air supply modes.

[0059] The active air supply assembly 400 includes a fan, which is a DC fan, fixed to the side or lower shelf of the trolley bracket 100, in a convenient location away from heat sources. The fan outlet is connected to the side wall air inlet of an annular air inlet chamber 410 via a flexible or rigid duct 420.

[0060] The annular air intake chamber 410 is a flat, hollow, donut-shaped metal box installed at the bottom of the furnace body 200. The size of its central hole is larger than the outer diameter of the ash collection channel 210 (i.e., the guide tube 211), allowing it to surround the outside of the ash collection channel 210 without contacting it. In this way, the ash falling path is completely isolated from the air supply system, eliminating the possibility of ash clogging the air duct.

[0061] A rotatable air duct ring 430 is provided between the upper surface of the annular air intake chamber 410 and the bottom of the furnace body 200. The air duct ring 430 is a flat metal ring, the inner and outer diameters of which match the annular air intake chamber 410. At the bottom of the furnace body 200, corresponding to the position of the air duct ring 430, several air inlets 220 are evenly spaced circumferentially. The air duct ring 430 is key to achieving multiple air supply modes. In this embodiment, the air duct ring 430 is divided into multiple sectors along its circumference. Each sector has a set of through-hole groups with different configurations, including a first hole group 431, a second hole group 432, a third hole group 433, and a closed area 434, corresponding to the powerful ignition mode, the uniform roasting mode, the cyclone roasting mode, and the closed mode, respectively.

[0062] The first hole group 431 has several through holes of the first diameter, such as round holes with a diameter of 10-15 mm, on its sector. The number and position of these holes correspond one-to-one with the air inlet 220 at the bottom of the furnace body 200. When this group of through holes is rotated to align with the air inlet 220, the airflow generated by the blower will form several strong and concentrated air columns, which will be blown directly onto the charcoal on the charcoal rack to achieve rapid ignition.

[0063] On the sector of the second hole group 432, corresponding to the position of each air inlet 220, there is a group of micro-holes consisting of multiple second-diameter micro-holes (e.g., with a diameter of 2-3 mm). When this group of through holes is aligned with the air inlet 220, the airflow is dispersed into a uniform and gentle airflow, stably supplying oxygen from the bottom, which is suitable for long-term low-temperature slow baking.

[0064] On the sector of the third hole group 433, corresponding to the position of each air inlet 220, there are guide holes with inclined guide surfaces or stamped guide grooves. When the airflow passes through, it will be guided to enter along the tangential direction of the furnace, thereby forming a rotating and rising hot airflow inside the furnace, achieving rapid high-temperature roasting of the food.

[0065] The enclosed area 434 is a solid sector on the air duct ring 430 without any through holes. When it is necessary to shut down the flame or stop the air supply, rotate this enclosed area 434 to align it with the air inlet 220 to completely block the airflow channel at the bottom.

[0066] To ensure air supply efficiency, annular seals made of graphite or high-temperature resistant silicone can be installed between the air duct ring 430 and the annular air inlet chamber 410, and between the air duct ring 430 and the bottom of the furnace body 200, to reduce air leakage.

[0067] The number and configuration of through-hole groups on the air duct ring 430 can be increased, decreased, or changed according to product positioning. For example, the third hole group 433 can be omitted to simplify the structure, or a hybrid hole group combining micropores and flow channels can be added.

[0068] To facilitate user operation, an operating lever is installed on the outer side of the oven body 200 (e.g., on the column of the trolley support 100 or on the platform). This lever is connected to a drive lug on the air duct ring 430 via a simple linkage mechanism. The user can precisely rotate the air duct ring 430 by moving the operating lever up and down or left and right. Next to the sliding path of the lever is an indicator seat with mode markings (such as "Ignition," "Braise," "Grill," and "Off") that correspond one-to-one with the function of each through-hole group on the air duct ring 430, allowing the user to intuitively select the desired mode.

[0069] A control module is also integrated into the shelf of the trolley support 100. This module contains a removable rechargeable battery pack to power the DC fan, enabling wireless and portable use of the product. The module panel features a power switch and a rotary controller for stepless adjustment of the fan speed. Users can not only select the air supply mode but also finely adjust the air volume, thereby achieving further precise control of the furnace temperature.

[0070] In use, the user first places charcoal on the charcoal rack, switches the air duct ring 430 to "ignition" mode using the lever, and adjusts the airflow to maximum using the speed controller. After igniting the ignition material, the strong airflow quickly brings the charcoal into full combustion. Once the preset temperature is reached, the user can switch the lever to "braising" or "roasting" mode according to cooking needs, and adjust the airflow speed appropriately to maintain a stable cooking temperature. Throughout the process, ash falls into the ash collector 300 via the central ash channel 210. After cooking, the air duct ring 430 can be switched to "off" mode, and the damper on top of the stove lid can be closed to quickly and safely extinguish the charcoal fire.

[0071] By setting up an independent ash collection channel 210 located at the center of the furnace body 200 and surrounded by an annular air intake chamber 410, physical isolation between the air supply system and the ash collection path is achieved, avoiding the risk of ash clogging or burning of the air supply components. The rotatable air duct ring 430 with various configuration through-hole groups, combined with the adjustable-speed active air supply component 400, provides the oven with multiple professional cooking modes such as powerful ignition, even slow roasting, swirling roasting, and safe flameout, achieving rapid and precise control of the combustion state and temperature inside the oven. This not only improves cooking quality and efficiency but also significantly reduces smoke and saves fuel by promoting complete charcoal combustion. Furthermore, through the integrated external operating mechanism and control module, all adjustments can be made intuitively and conveniently in a safe area away from the heat source, comprehensively optimizing the user experience.

[0072] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0073] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0074] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A portable, cart-based, smokeless braising oven, characterized in that, include: A trolley support (100) is provided with at least one pair of wheels (110) at its bottom; The furnace body (200) is fixed on the trolley bracket (100). The furnace body (200) is hemispherical. The top of the furnace body (200) is provided with a grill for placing food, the middle is provided with a charcoal rack, and the bottom center is provided with an ash collection channel (210). The ash collection channel (210) extends downward along the furnace body (200), and the top of the ash collection channel (210) is provided with a grid. An ash collector (300) is located below the furnace body (200) directly opposite the ash discharge channel (210) and is used to collect the ash falling through the ash discharge channel (210) inside the furnace body (200); An active air supply assembly (400) includes a fan, an annular air inlet chamber (410), an air duct (420), and an air duct ring (430). The fan is fixed on the trolley bracket (100). The air outlet of the fan is connected to the annular air inlet chamber (410) through the air duct (420). The annular air inlet chamber (410) is located below the furnace body (200) and surrounds the ash collection channel (210). The air duct ring (430) is located between the annular air inlet chamber (410) and the furnace body (200). The air duct ring (430) has at least two sets of through holes with different configurations along its circumference. The furnace body (200) has several air inlets (220) spaced apart circumferentially from the air duct ring (430). The air duct ring (430) can rotate relative to the furnace body (200) to selectively connect one set of through holes with the air inlet (220).

2. The portable trolley-type smokeless oven according to claim 1, characterized in that: The at least two sets of through-holes with different configurations include: The first hole group (431) includes a plurality of first diameter through holes, the number of which is the same as the number of air inlets (220); The second hole group (432) includes a number of microhole groups, the number of which is the same as the number of air inlets (220), and each microhole group includes a plurality of uniformly distributed second-diameter through holes. The size of the first diameter through hole is larger than that of the second diameter through hole.

3. The portable trolley-type smokeless oven according to claim 2, characterized in that: The at least two sets of through-holes with different configurations further include: The third hole group (433) includes a plurality of guide holes with inclined guide surfaces.

4. The portable trolley-type smokeless oven according to claim 1, characterized in that: The air duct ring (430) has a non-perforated closed area (434). When the closed area (434) is rotated to align with the air inlet (220), the airflow passage between the annular air inlet chamber (410) and the furnace body (200) is blocked.

5. The portable trolley-type smokeless oven according to claim 1, characterized in that: The active air supply assembly (400) also includes an operating mechanism, which includes an operating element (441) located on the outside of the furnace body (200) and a transmission mechanism connecting the operating element (441) and the air duct ring (430). The operating mechanism is used to drive the air duct ring (430) to rotate.

6. The portable trolley-type smokeless oven according to claim 5, characterized in that: The operating component (441) is an operating lever, and the annular air intake chamber (410) is provided with an indicator seat; The indicator base is provided with pattern markings corresponding to the different configurations of the through-hole groups; When the operating lever is moved to a certain mode indicator position, the transmission mechanism drives the air duct ring (430) to rotate, so that the through hole group corresponding to the mode indicator is connected to the air inlet (220).

7. The portable trolley-type smokeless oven according to claim 1, characterized in that: The fan is a DC fan; The trolley support (100) is also equipped with a control module, which includes a rechargeable battery pack for powering the fan and a speed controller for adjusting the fan speed.

8. The portable trolley-type smokeless oven according to claim 1, characterized in that: The bottom of the furnace body (200) is provided with a guide tube (211), and the ash falling channel (210) is formed inside the guide tube. The upper end of the guide tube (211) is connected to the bottom of the furnace body (200) and is provided with an installation flange. The lower end of the guide tube (211) is provided with a connecting seat (212), which extends radially outward from the lower end of the guide tube (211).

9. The portable trolley-type smokeless oven according to claim 8, characterized in that: The upper end of the ash collector (300) extends outward radially to form a mating end face. Part of the mating end face is folded inward along a straight line from bottom to top to form a slot. The ash collector (300) is engaged with the connecting seat (212) through the slot.

10. The portable trolley-type smokeless oven according to claim 1, characterized in that: A sealing element is provided between the air duct ring (430) and the annular air inlet chamber (410), and / or between the air duct ring (430) and the furnace body (200).

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