Fire bowl with recessed basin

Abstract

Fire bowl (100) with a recessed basin, comprising: an insert (102) having a cavity structure (1021) for burning flames and an opening (1022) arranged on the top side of the cavity structure (1021) and connected to the cavity structure (1021); a grid (103) which is arranged in the cavity structure (1021) of the insert (102) and serves to place combustion materials; characterized by the fact that a central part of the grid (103) is recessed in a direction away from the insert (102), to form a groove-shaped structure (108) on the grid (103) in order to limit the flames of the combustion material to the central part of the insert (102) and to collect the ash produced by the combustion material in the groove-shaped structure (108).

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of heating appliances, in particular a fire bowl with a recessed basin. TECHNICAL BACKGROUND

[0002] A fire bowl with a recessed basin is a commonly used device in scenarios such as outdoor camping, garden heating, and open-flame grilling. Its primary function is to hold fuel (charcoal, firewood, etc.) and produce a stable flame, while simultaneously allowing for convenient ash removal, ensuring complete combustion, and guaranteeing safe operation. An ideal fire bowl design must meet key requirements such as "concentrated and controllable flames, convenient ash removal, precise oxygen supply, and safe and reliable use."It is essential to avoid safety risks caused by the spread of flames, as well as to ensure complete combustion of the fuel in order to improve heat utilization, while simultaneously reducing the difficulty of cleaning in order to adapt to complex outdoor usage environments.

[0003] Existing fire bowls have obvious flaws in their grid structure and oxygen supply design, making it difficult to simultaneously address combustion efficiency, safety, and ease of cleaning. The specific problems are as follows: The grates of existing fire bowls typically have a flat structure and lack a flame-control design. Once fuel is added, it easily diffuses towards the edge of the grate, causing the flames to spread in all directions along with the fuel. On the one hand, these spread flames can easily ignite surrounding objects (tents, clothing, grass, trees, etc.), especially in windy outdoor conditions where the flames can become more intense, posing a significant safety risk. On the other hand, the spread flames cannot concentrate the heat, and the heat escapes haphazardly in all directions. This not only results in poor heating and grilling performance but also wastes fuel and reduces heat efficiency.

[0004] DETAILED DESCRIPTION The present utility model serves to overcome the problem of incomplete combustion of substances in a fire bowl in the prior art and provides a fire bowl with a recessed basin. The fire bowl comprises an insert and a grate.

[0005] The insert features a cavity structure for the burning of flames and an opening located on the top side of the cavity structure and connected to the cavity structure.

[0006] The grid is arranged in the cavity structure of the insert and serves to place combustion materials.

[0007] A central part of the grid is recessed in a direction away from the insert to form a groove-shaped structure on the grid in order to limit the flames of the combustion material to a central part of the insert and to collect the ash produced by the combustion material in the groove-shaped structure.

[0008] A cross-section of the first side wall of the groove-shaped structure is arranged in an arc shape or in a stepped shape.

[0009] Alternatively, the groove-shaped structure comprises a first bottom wall and a first side wall extending radially outwards from a perimeter of the first bottom wall and arcuately or inclined towards the opening, the first bottom wall being arranged flat.

[0010] Several oxygen inlet holes are provided on a second side wall of the grille to connect a chamber on an outer side of the grille with a chamber of the cavity structure on an inner side of the grille, the oxygen inlet holes being oriented towards the combustion material and the combustion flames. Alternatively, several oxygen inlet holes are provided on a third side wall of the insert to connect the air on an outer side of the insert with the chamber of the cavity structure on an inner side of the insert, the oxygen inlet holes being oriented towards the combustion material and the combustion flames.

[0011] A supporting structure is formed on an inner wall of the cavity structure. A boundary structure, supported by the supporting structure, is formed on the grid.

[0012] The support structure is a support ring located on a second bottom wall of the insert. A lower end of the support ring is inclined towards a central axis of the insert. The boundary structure is a connecting ring formed by bending an upper section of the grid upwards. The connecting ring is inclined and rests against the support ring.

[0013] The support ring has several ventilation holes. The ventilation holes are evenly spaced along a fourth side wall of the support ring.

[0014] The fire bowl also includes an ash pan and a connecting element. The ash pan is connected below the grate via the connecting element.

[0015] The connecting element is an L-shaped structure, so that when the ash tray is connected below the grate, a gap remains between it and the bottom surface of the grate. The ventilation holes are located in this gap.

[0016] The fire bowl, with a recessed basin, further comprises a housing. The insert is arranged within the housing. A third bottom wall of the housing is connected to an air inlet plate. Several air inlet slots are provided on a fifth side wall of the air inlet plate. The air inlet slots are evenly spaced along this fifth side wall. Several additional ventilation holes are provided on a third side wall of the insert. A cavity is provided between the housing and the insert, connecting the additional ventilation holes and the air inlet slots. The advantageous effects of the present utility model are as follows: The groove-shaped structure created by the indentation in the central part of the grill effectively confines the fuel and prevents it from spreading to the edges, thus fundamentally solving the problem of flames spreading in all directions and fuel distribution. Even in windy outdoor conditions, the flames remain stable and confined to the central area of ​​the grill, significantly reducing the risk of igniting surrounding objects such as tents, clothing, grass, and trees. Simultaneously, the concentrated flames create a focused heat source, minimizing heat loss in all directions. This improves both heating and grilling efficiency, reduces fuel waste, and thus significantly increases heat utilization. DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a schematic structural view of a fire bowl with a recessed basin in an embodiment of the present utility model. Fig. Figure 2 is a first cross-sectional view of the fire bowl with a recessed basin in which the Fig. 1. Example shown. Fig. Figure 3 is an enlarged view at point A in Fig. 2. Fig. Figure 4 is a sectional view of a fire bowl with a recessed basin in a further embodiment of the present utility model. Fig. Figure 5 is an enlarged view at point B in Fig. 4. Fig. 6 is a second sectional view of the fire bowl with a recessed basin in which the Fig. 1. Example shown. Fig. Figure 7 is an enlarged view at point C in Fig. 6.

[0017] The meanings of the reference symbols in the drawings are as follows: 100 Fire bowl; 101 Housing; 1011 Third bottom wall; 102 Insert; 1021 Cavity structure; 1022 Opening; 1023 Third side wall; 1024 Second bottom wall; 103 Grate; 1031 Second side wall; 104 Ash pan; 105 Air inlet plate; 1051 Fifth side wall; 106 Additional ventilation hole; 107 Oxygen inlet hole; 108 Grooved structure; 1081 First bottom wall; 1082 First side wall; 109 Connecting ring; 110 Support ring; 1101 Fourth side wall; 111 Ventilation hole; 112 Air inlet slot; 113 Raised section; 114 Recess; 115 Connecting element; 116 Locking groove; 117 Support structure; 118 Boundary structure. SPECIFIC EXECUTION FORMS

[0018] The present disclosure is described in detail below with reference to the drawings and in combination with exemplary embodiments.

[0019] As in the Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. As shown in Figure 5, a fire bowl 100 with a recessed basin comprises a housing 101, an insert 102, a grid 103, an ash bowl 104 and a connecting element 115.

[0020] The insert 102 has a cavity structure 1021 for the combustion of flames. The grid 103 is arranged on a first bottom wall 1081 of the insert 102 to hold a combustible material. A central part of the grid 103 is recessed in a direction away from the insert 102 to form a groove-shaped structure 108 on the grid 103. This groove-shaped structure serves to confine the flames of the combustible material to a central part of the insert 102 and to collect the ash produced by the combustible material in the groove-shaped structure 108. In the present embodiment, the grid 103 is recessed. On a first side wall 1082 of the groove-shaped structure 108 (i.e., a second side wall 1031 of the grid 103), several oxygen inlet holes 107 are provided to connect a space on an outside of the grid 103 and a space of the cavity structure 1021 on an inside of the grid 103.The oxygen inlet holes 107 are arranged in the direction of the combustion material and the flames, thus directing oxygen towards the flames. Simultaneously, the oxygen inlet holes 107 can also be provided on a third side wall 1023 of the insert 102 to connect the air on an outside of the insert 102 with the space of the cavity structure 1021 on an inside of the insert 102, with the oxygen inlet holes 107 also being arranged in the direction of the combustion material and the flames to ensure a precise oxygen supply.

[0021] The recessed arrangement of the grid 103 allows the fuel to accumulate naturally in a central area of ​​the groove-shaped structure 108, preventing it from spreading to the edges. This effectively confines the flames to burning in the central area and prevents them from spreading in all directions due to fuel distribution. Since the oxygen inlet holes 107 are located on an inner wall of the groove-shaped structure 108, outside air can flow directly to the core of the flame after passing through them, providing a precise oxygen supply for combustion. This avoids the problems of oxygen distribution and low efficiency of the oxygen inlet holes found in conventional grids, promotes complete combustion of the fuel, and reduces the generation of black smoke and energy waste.At the same time, the ash produced by combustion naturally falls down and collects in the groove-shaped structure 108, which facilitates subsequent concentrated cleaning without the need to frequently turn the combustion material, thus ensuring both the stability of the combustion and improving the convenience of cleaning.

[0022] A cross-section of the first side wall 1082 of the groove-shaped structure 108 is arranged in an arcuate, inclined, or stepped configuration. Specifically, when the cross-section of the first side wall 1082 of the groove-shaped structure 108 is arcuate, it has a smooth surface transition that allows the fuel to accumulate more naturally towards the center of the first bottom wall 1081, while simultaneously causing the flames to form a more stable vortex within the arcuate space, thereby enhancing heat reflection and concentration. When the cross-section of the first side wall 1082 is inclined, for example, at an angle of 45 degrees to 60 degrees, the fuel can be concentrated more directly at the first bottom wall 1081, and the inclined first side wall 1082 offers a more flexible angle selection for the placement of the oxygen inlet holes 107.Depending on the type of fuel and the combustion intensity requirements, the orientation of the oxygen inlet holes 107 can be precisely adjusted to ensure that oxygen is delivered to the combustion zone with high efficiency. The stepped side wall allows for layered placement based on the size of the fuel to achieve flame control at different heights. In the present embodiment, the groove-shaped structure 108 specifically comprises the flat first bottom wall 1081 and the first side wall 1082, which extends radially outward from a circumference of the first bottom wall 1081 and arcs toward the opening 1022.This structural design results in a relatively deep and rounded space being formed in the central area of ​​the grid 103, which is advantageous both for the stable placement of combustion materials such as charcoal and firewood without easy rolling, and also allows the ash produced during the combustion process to slide down along the arc-shaped first side wall 1082 to the center of the first bottom wall 1081, thus preventing an accumulation of ash near the oxygen inlet holes 107, which would cause a blockage, and ensuring the continuity of the oxygen supply.

[0023] In another embodiment, the groove-shaped structure 108 comprises a first bottom wall 1081 and a first side wall 1082, which extends radially outward from a circumference of the first bottom wall 1081 and arcuates or inclines toward the opening 1022, wherein the first bottom wall 1081 is flat. The design of the flat first bottom wall 1081 provides a stable support surface for the fuel, allowing solid fuels such as charcoal and coal blocks to be laid out uniformly. This prevents an uneven distribution of the fuel due to unevenness in the first bottom wall 1081 from impairing flame stability. At the same time, the flat first bottom wall 1081 also facilitates the concentrated accumulation of ash. When the fuel has burned out, the ash naturally accumulates on the first bottom wall 1081.For cleaning, the user simply needs to remove the grate 103 to easily empty the ash from the first bottom wall 1081, which is simple and efficient. Furthermore, the combination of the flat first bottom wall 1081 with the curved or inclined first side wall 1082 results in the interior of the groove-shaped structure 108 having a shape that is wide at the top and narrow at the bottom. This shape is not only advantageous for the upward concentration of the flames to reduce heat loss from the sides, but it can also create an upward airflow during the combustion process. This promotes that the air, after entering through the oxygen inlet holes 107, is thoroughly mixed with the fuel, further improving combustion efficiency.

[0024] A support structure 117 is formed on an inner wall of the cavity structure 1021. A boundary structure 118, supported by the support structure 117, is formed on the grid 103. The support structure 117 is a support ring 110, which is arranged on a second bottom wall 1024 of the insert 102. A lower end of the support ring 110 is inclined towards a central axis of the insert 102. The boundary structure 118 is a connecting ring 109, which is formed by bending an upper surface of the grid 103 upwards. The connecting ring 109 is inclined and rests against the support ring 110.The inclined design of the support ring 110 ensures that the support ring 110 and the connecting ring 109 of the grid 103 form a stable angular fit. This guarantees precise positioning during the installation of the grid 103 and distributes the weight of the grid 103 and the fuel across the inclined surface, thereby improving the load-bearing capacity of the overall structure. When the fuel is placed on the grid 103, the inclined structure of the support ring 110 directs the force of gravity towards the central axis of the insert 102, reducing pressure on the edge of the insert wall and preventing deformation of the insert 102 due to uneven force distribution after prolonged use, thus extending the service life of the fire bowl 100.

[0025] The support ring 110 has several ventilation holes 111, the ventilation holes 111 being evenly spaced along a fourth side wall 1101 of the support ring 110. Air enters from the ventilation holes 111 into a bottom surface of the grid 103 and then passes through the oxygen inlet holes 107 onto the grid 103 to provide a sufficient supply of oxygen to the combustion material, thereby further improving the completeness and uniformity of the oxygen supply.Since the ventilation holes 111 are evenly distributed along the fourth side wall 1101 of the support ring 110, air can enter the space at the bottom of the grid 103 from multiple directions simultaneously to form an annular flow. This prevents excessively high or low local oxygen concentrations, ensures that each area of ​​the combustion material receives a stable oxygen supply, maintains continuous and stable flame burning, and reduces phenomena of interrupted or incomplete combustion due to local oxygen deficiency. A central portion of the groove-shaped structure 108 is convex to form a protrusion 113, which is a circular arc-shaped structure.The arc-shaped protrusion 113 can exert a further supporting and dispersing effect on the fuel, preventing a large quantity of fuel from accumulating directly against the first bottom wall 1081 of the groove-shaped structure 108, which would lead to an insufficient local oxygen supply. When fuels such as charcoal and firewood are placed on the grid 103, the protrusion 113 can prop them up and spread them out naturally in all directions, creating more gaps between the fuels. This facilitates the circulation of oxygen introduced through the oxygen inlet holes 107 within the fuel and promotes a more complete combustion reaction.Simultaneously, the circular arc design can reduce the contact area between the combustion material and the grid 103, thus minimizing the possibility of rapid heat loss through conduction via the grid 103, contributing to maintaining the temperature of the combustion zone, and improving heat utilization. Furthermore, the circular arc surface is smooth and free of sharp edges, preventing any sharp structure from excessively cutting into the combustion material or hindering ash fall. A locking groove 116 is provided on the raised section 113 to facilitate the user's removal of the grid 103 by inserting a tool into the groove.

[0026] As in the Fig. 6 to Fig.As shown in Figure 7, a further optional embodiment is provided in the projection 113 by a recess 114, wherein a central part of the recess 114 is convex and a gap is reserved to the upper surface of the projection 113. By inserting a tool such as a lever into the recess 114, the grid 103 can be conveniently removed from an insert 102, which facilitates cleaning or replacement of the grid 103 without having to directly touch the high-temperature body of the grid 103, thereby improving operational safety.The design of the gap between the domed structure in the center of the recess 114 and the top of the protrusion 113 can provide both a stable lever support point for the lever and prevent the tool from slipping during the levering process, thus ensuring that a disassembly process of the grid 103 is energy-saving and efficient, which is particularly suitable for scenarios in which the temperature of the grid 103 is high after combustion.

[0027] The ash tray 104 is connected below the grid 103 via the connecting element 115, the connecting element 115 being an L-shaped structure. When connected below the grid 103, the ash tray 104 maintains a gap to a base surface of the grid 103, with the ventilation holes 111 located within this gap. This structural design allows air entering through the ventilation holes 111 to pass smoothly through this gap and then enter the combustion zone via the oxygen inlet holes 107 on the grid 103. This ensures the continuous flow of oxygen and provides a constant supply of oxygen for combustion.On the other hand, the ash produced by combustion falls through the gaps in the grate 103 into the ash pan 104, thus concentrating the ash collection and preventing it from being scattered onto other parts of the fire bowl 100, which greatly simplifies subsequent cleaning. When the ash needs to be cleaned, the grate 103, along with the ash pan 104, simply needs to be removed and the ash emptied into the ash pan 104 – a simple and convenient process.

[0028] The insert 102 is arranged within the housing 101, with the third bottom wall 1011 of the housing 101 being connected to an air inlet plate 105. Several air inlet slots 112 are provided on the fifth side wall 1051 of the air inlet plate 105, the air inlet slots 112 being evenly spaced along the fifth side wall 1051 of the air inlet plate 105, thus providing a main channel for the entry of outside air into the interior of the fire bowl 100. The design of the evenly distributed air inlet slots 112 ensures that air enters the fire bowl 100 evenly from multiple directions at one bottom, thereby avoiding the problem of uneven airflow distribution due to a single air inlet.When used outdoors, the air inlet slots 112 can continuously and stably introduce air even when the wind direction changes, in order to provide a sufficient oxygen base for combustion and to ensure continuous and stable burning of the flames.

[0029] Several additional ventilation holes 106 are provided on the third side wall 1023 of the insert 102, with a cavity between the housing 101 and the insert 102 connecting the additional ventilation holes 106 and the air inlet slots 112. After the outside air enters through the air inlet slots 112 of the air inlet plate 105, some of the air passes through the oxygen inlet holes 107 to the underside of the fuel, and another portion of the air passes through the cavity via the additional ventilation holes 106 on the third side wall 1023 of the insert 102 into the combustion chamber inside the insert 102. The provision of the additional ventilation holes 106 further supplements the oxygen required for combustion, thus effectively preventing the problem of incomplete combustion due to insufficient oxygen supply, particularly with a large quantity of fuel or in the case of a strong fire.The cavity design acts as a buffer and pressure equalizer, ensuring a more stable airflow velocity for the air entering the additional ventilation holes 106 and a more even oxygen distribution. This further improves combustion efficiency and reduces the production of harmful gases. Simultaneously, the housing 101 not only protects internal components such as the insert 102 and the grille 103 from damage caused by external collisions, but also effectively shields the high temperature of the insert 102. This prevents burns when touching the exterior of the fire bowl 100, significantly enhancing safety during use.

[0030] The above descriptions merely represent some preferred embodiments of the present disclosure and explain the technical principles applied. The person skilled in the art should understand that the scope of the utility model involved in the embodiments of the present disclosure is not limited to technical solutions formed by specific combinations of the above technical features, but is also intended to cover other technical solutions formed by any combination of the above technical features or their equivalent features, without departing from the above concept of the utility model. For example, technical solutions formed by mutually substituting the above features with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

Fire bowl (100) with a recessed basin, comprising: an insert (102) having a cavity structure (1021) for burning flames and an opening (1022) arranged on the upper side of the cavity structure (1021) and connected to the cavity structure (1021); a grid (103) arranged in the cavity structure (1021) of the insert (102) and serving for placing fuels; characterized in that a central part of the grid (103) is recessed in a direction away from the insert (102) to form a groove-shaped structure (108) on the grid (103) to limit the flames of the fuel to the central part of the insert (102) and to collect the ash produced by the fuel in the groove-shaped structure (108). Fire bowl (100) according to claim 1, characterized in that a cross-section of the first side wall (1082) of the groove-shaped structure (108) is arranged in an arcuate or stepped manner; or that the groove-shaped structure (108) comprises a first bottom wall (1081) and a first side wall (1082) which extends radially outwards from a circumference of the first bottom wall (1081) and arcuately or inclined towards the opening (1022), wherein the first bottom wall (1081) is arranged flat. Fire bowl (100) according to claim 1, characterized in that several oxygen inlet holes (107) are provided on a second side wall (1031) of the grid (103) to connect a space on an outside of the grid (103) and a space of the cavity structure (1021) on an inside of the grid (103), wherein the oxygen inlet holes (107) are arranged in the direction of the combustion material and the flames of the combustion material; or that several oxygen inlet holes (107) are provided on a third side wall (1023) of the insert (102) to connect the air on an outside of the insert (102) and the space of the cavity structure (1021) on an inside of the insert (102), wherein the oxygen inlet holes (107) are arranged in the direction of the combustion material and the flames of the combustion material. Fire bowl (100) according to one of claims 1 to 3, characterized in that a support structure (117) is formed on an inner wall of the cavity structure (1021), wherein a boundary structure (118) supported by the support structure (117) is formed on the grid (103). Fire bowl (100) according to claim 4, characterized in that the support structure (117) is a support ring (110) which is arranged on a second bottom wall (1024) of the insert (102), wherein a lower end of the support ring (110) is arranged inclined in the direction of a central axis of the insert (102). Fire bowl (100) according to claim 5, characterized in that the limiting structure (118) is a connecting ring (109) which is formed by bending an upper surface of the grid (103) upwards, wherein the connecting ring (109) is arranged at an inclination and the connecting ring (109) rests against the support ring (110). Fire bowl (100) according to claim 5, characterized in that several ventilation holes (111) are provided on the support ring (110), wherein the ventilation holes (111) are arranged uniformly along a fourth side wall (1101) of the support ring (110). Fire bowl (100) according to claim 7, characterized in that the fire bowl (100) further comprises an ash bowl (104) and a connecting element (115), wherein the ash bowl (104) is connected below the grid (103) via the connecting element (115). Fire bowl (100) according to claim 8, characterized in that the connecting element (115) is an L-shaped structure, so that when the ash bowl (104) is connected below the grid (103), it reserves a gap to a bottom surface of the grid (103), wherein the ventilation holes (111) are located in the gap. Fire bowl (100) according to claim 1, characterized in that the fire bowl (100) further comprises a housing (101), wherein the insert (102) is arranged in the housing (101), wherein a third bottom wall (1011) of the housing (101) is connected to an air inlet plate (105), wherein several air inlet slots (112) are provided on a fifth side wall (1051) of the air inlet plate (105), and wherein the air inlet slots (112) are arranged uniformly along the fifth side wall (1051) of the air inlet plate (105); and wherein several additional ventilation holes (106) are provided on a third side wall (1023) of the insert (102), wherein a cavity is reserved between the housing (101) and the insert (102) which connects the additional ventilation holes (106) and the air inlet slots (112).

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