A secondary combustion furnace suitable for barbecues

Abstract

A secondary combustion furnace for barbecue includes a furnace body, a supporting rod and a cover plate. The furnace body includes an inner furnace and an outer furnace which is sleeved outside the inner furnace. The inner furnace is spacedly sleeved with the outer furnace, and a gas path is formed between the two. A plurality of inner lower gas holes are formed at intervals around the inner furnace near the supporting rod, and a plurality of inner upper gas holes are formed at intervals around the inner furnace away from the supporting rod. A plurality of outer lower gas holes are formed at intervals on one side of the outer furnace near the supporting rod, and a plurality of outer upper gas holes are formed at intervals on one side of the outer furnace away from the supporting rod. Oxygen is sent into the gas path through the outer lower gas holes and the outer upper gas holes, and then the oxygen is sent out from the inner lower gas holes to perform a first combustion-supporting operation on the burning of apple wood, and the oxygen is sent out from the inner upper gas holes to perform a second combustion-supporting operation on the rising flame, so as to improve the baking temperature and improve the burning efficiency of the apple wood.

Description

Technical Field

[0001] This utility model relates to the field of combustion furnace equipment technology, and in particular to a secondary combustion furnace suitable for barbecue. Background Technology

[0002] A barbecue table is a device combining cooking and dining functions, primarily used in commercial catering or outdoor activities. It uses a combustion chamber to burn fuel and release heat to grill food. Currently, the combustion efficiency of combustion chambers used in barbecues is not high. For example, Chinese patent CN202021889029.7 discloses a tabletop barbecue grill that is easy to clean. It includes a grill body, a hopper and an oil box connected to the side of the grill body. Inside the grill body are a grilling rack, an oil collection tray, a fire shield, and a food box. One side of the food box has a combustion chamber, and the other side is connected to the hopper. An auger and air duct are movably installed inside the food box. One end of the auger is located in the combustion chamber, and the other end is connected to a motor. This barbecue grill feeds fuel into the food box through the hopper, and the motor on the side of the food box uses the auger to deliver fuel to the combustion chamber for ignition. This charcoal grill can only use the air duct for primary combustion, resulting in low combustion efficiency and an inability to further increase the grilling temperature, thus reducing the overall combustion efficiency. Utility Model Content

[0003] In view of this, the present invention provides a secondary combustion oven suitable for grilling to solve the above problems.

[0004] A secondary combustion oven suitable for grilling includes an oven body, multiple support rods spaced apart at one end of the oven body, and a cover plate covering the end of the oven body away from the support rods. The oven body includes an inner oven, an outer oven fitted over the inner oven, and two connecting rings respectively located at both ends of the inner oven. The inner oven and the outer oven are two cylindrical structures of different sizes, and their ends are fixedly connected by the two connecting rings. The inner oven and the outer oven are spaced apart, with a gas passage between them. The inner oven has multiple lower inner gas holes spaced apart around the support rods, and multiple upper inner gas holes spaced apart around the outer oven away from the support rods. The outer oven has multiple lower outer gas holes spaced apart on one side near the support rods, and multiple upper outer gas holes spaced apart on one side away from the support rods. The inner lower air hole, the inner upper air hole, the outer lower air hole, and the outer upper air hole are interconnected through the air passage, and the inner lower air hole and the outer lower air hole, as well as the inner upper air hole and the outer upper air hole, are on the same horizontal line.

[0005] Furthermore, a feeding channel and an ignition channel are respectively provided on one side of the inner furnace and the outer furnace.

[0006] Furthermore, a retaining ring for securing the cover plate is provided on the side of a connecting ring near the cover plate away from the support rod.

[0007] Furthermore, a through hole is provided on the cover plate.

[0008] Furthermore, the secondary combustion oven suitable for grilling also includes a slag box disposed at the end of the oven body having the support rod.

[0009] Furthermore, the inner furnace has a ring of extension extending towards one end of the slag box, the slag box is fitted onto the extension and fixedly connected to the furnace body by screws.

[0010] Compared with the prior art, the secondary combustion oven for grilling provided by this utility model introduces oxygen into the gas path through the outer lower air hole and the outer upper air hole. Then, the oxygen is sent out from the inner lower air hole to perform the first combustion-supporting operation on the apple wood, and the oxygen is sent out from the inner upper air hole to perform the second combustion-supporting operation on the rising flames. In this way, the grilling temperature is increased and the combustion efficiency of the apple wood is improved. Attached Figure Description

[0011] Figure 1 A schematic diagram of the structure of the secondary combustion oven suitable for grilling provided by this utility model.

[0012] Figure 2 for Figure 1 A cross-sectional schematic diagram of a secondary combustion oven suitable for grilling. Detailed Implementation

[0013] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0014] like Figure 1 The diagram shows a structural schematic of the secondary combustion oven suitable for grilling provided by this utility model. The secondary combustion oven includes a furnace body 10, multiple support rods 20 spaced apart at one end of the furnace body 10, and a cover plate 30 covering the end of the furnace body 10 away from the support rods 20. It is conceivable that the secondary combustion oven also includes other functional modules, such as applewood fuel for combustion, ignition charcoal for starting, a heating element lighter, a blower, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0015] Please see Figure 2 The furnace body 10 includes an inner furnace 11, an outer furnace 12 sleeved outside the inner furnace 11, and two connecting rings 13 respectively disposed at both ends of the inner furnace 11.

[0016] The inner furnace 11 and the outer furnace 12 are two cylindrical structures of different sizes, and their ends are fixedly connected by two connecting rings 13. A feeding channel 14 and an ignition channel 15 are respectively provided through one side of the inner furnace 11 and the outer furnace 12. The support rods 20 are arranged at intervals to support applewood and ignition charcoal. The feeding channel 14 is connected to the output end of an external automatic feeder to achieve automatic feeding, allowing the applewood to enter along the feeding channel 14 and fall onto the support rods 20. The ignition channel 15 is used to pass through the output end of a wire lighter, so that the wire lighter can ignite the ignition charcoal placed on the support rods 20. The automatic feeder itself is existing technology; its specific working principle can be found in the working principle of the spiral conveyor in the environmentally friendly biomass intelligent barbecue grill and its usage method disclosed in Chinese Patent CN202210048036.1.

[0017] The inner furnace 11 and the outer furnace 12 are nested together at intervals, with an air passage 16 between them. The inner furnace 11 has multiple inner lower air holes 111 spaced around its perimeter near the support rod 20, and multiple inner upper air holes 112 spaced around its perimeter away from the support rod 20. The outer furnace 12 has multiple outer lower air holes 121 spaced around its side near the support rod 20, and multiple outer upper air holes 122 spaced around its side away from the support rod 20. The inner lower air holes 111, inner upper air holes 112, outer lower air holes 121, and outer upper air holes 122 are interconnected through the air passage 16, and the inner lower air holes 111 and outer lower air holes 121, as well as the inner upper air holes 112 and outer upper air holes 122, are all on the same horizontal line. During combustion-supporting operations, an external blower is activated, blowing oxygen through the lower outer air vent 121 and the upper outer air vent 122 into the air passage 16. Applewood burns on the support rod 20, and oxygen enters the inner furnace 11 through the lower inner air vent 111 to provide initial combustion support. Once the fire intensifies and the flames reach the height of the upper inner air vent 112, oxygen enters the inner furnace through the upper inner air vent 111 to provide a second combustion support, thereby increasing the roasting temperature and improving the combustion efficiency of the applewood.

[0018] It is conceivable that the output direction of the blower is towards the side of the outer furnace 12 that has the lower outer air hole 121 and the upper outer air hole 122, and there should be a baffle plate around it to ensure that the gas blown out by the blower can enter the lower outer air hole 121 and the upper outer air hole 122.

[0019] A retaining ring 17 protrudes from the side of the connecting ring 13 near the cover plate 30 away from the support rod 20. The retaining ring 17 is used to lock the cover plate 30 in place to secure the cover plate 30.

[0020] The cover plate 30 is placed in the retaining ring 17, and a through hole 31 is provided on it to ensure that the temperature can be transferred out from the through hole 31, thereby stabilizing the fire source and improving the combustion efficiency.

[0021] The secondary combustion oven suitable for grilling also includes a slag box 40 disposed at the end of the oven body 10 having the support rod 20.

[0022] The inner furnace 11 has an extension 18 extending from one end toward the slag box 40. The slag box 40 is fitted onto the extension 18 and fixedly connected to the furnace body 10 by screws to ensure that the gap between the furnace body 10 and the slag box 40 is blocked by the extension 18, so that all the residue produced by burning apple wood can fall into the slag box 40.

[0023] Compared with the prior art, the secondary combustion oven for grilling provided by this utility model introduces oxygen into the gas passage 16 through the outer lower air hole 121 and outer upper air hole 122. Then, the oxygen is sent out from the inner lower air hole 111 to perform the first combustion-supporting operation on the apple wood, and the oxygen is sent out from the inner upper air hole 112 to perform the second combustion-supporting operation on the rising flames. In this way, the grilling temperature is increased and the combustion efficiency of the apple wood is improved.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A secondary combustion oven suitable for grilling, characterized in that: The secondary combustion oven suitable for grilling includes a furnace body, multiple support rods spaced apart at one end of the furnace body, and a cover plate covering the end of the furnace body away from the support rods. The furnace body includes an inner furnace, an outer furnace fitted over the inner furnace, and two connecting rings respectively located at both ends of the inner furnace. The inner furnace and the outer furnace are two cylindrical shapes of different sizes, and their ends are fixedly connected by the two connecting rings. The inner furnace and the outer furnace are spaced apart, and there is a gas passage between them. The inner furnace is closer to the support rods. Multiple inner lower air holes are spaced around the inner furnace at intervals. Multiple inner upper air holes are spaced around the inner furnace at intervals away from the support rod. Multiple outer lower air holes are spaced around the outer furnace on one side near the support rod. Multiple outer upper air holes are spaced around the outer furnace on one side away from the support rod. The inner lower air holes, the inner upper air holes, the outer lower air holes, and the outer upper air holes are interconnected through the air passage. The inner lower air holes and the outer lower air holes, as well as the inner upper air holes and the outer upper air holes, are on the same horizontal line.

2. The secondary combustion oven suitable for grilling according to claim 1, characterized in that: The inner furnace and the outer furnace are respectively provided with a feeding channel and an ignition channel on one side.

3. The secondary combustion oven suitable for grilling according to claim 1, characterized in that: The connecting ring, located away from the support rod, has a protruding retaining ring on the side away from the support rod for securing the cover plate.

4. The secondary combustion oven suitable for grilling according to claim 1, characterized in that: A through hole is provided on the cover plate.

5. The secondary combustion oven suitable for grilling according to claim 1, characterized in that: The secondary combustion oven suitable for grilling also includes a slag box disposed at the end of the oven body having the support rod.

6. The secondary combustion oven suitable for grilling according to claim 5, characterized in that: The inner furnace has a ring of extension extending from one end toward the slag box. The slag box is fitted onto the extension and is fixedly connected to the furnace body by screws.

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