Tunnel furnace full-automatic production line for integrated processing of pastry stuffing

Abstract

The invention belongs to the technical field of tunnel furnaces, and particularly relates to a tunnel furnace full-automatic production line for integrated processing of pastry stuffing, the tunnel furnace full-automatic production line comprises a fuel gas combustion assembly, the fuel gas combustion assembly comprises a fuel gas combustion part and a positioning frame, and one end of the fuel gas combustion part is additionally arranged in a fixing frame; a gas pipe is arranged outside the fixing frame and used for providing gas for the gas combustion piece. A main body of the fuel gas combustion part is movably arranged on the positioning frame, a fixing block A is fixed to each of the two side edges of the positioning frame, an electric telescopic rod A is spherically hinged to each fixing block A, and the other end of each electric telescopic rod A is installed in the upper furnace body; the electric telescopic rod A stretches out and draws back to drive the gas combustion piece to shake, the gas combustion piece is adjusted to spray fire in different directions, and the coverage range of flames is widened. The coverage range of flames is widened, and local high-temperature areas and low-temperature dead angles are avoided.

Description

Technical Field

[0001] This invention relates to the field of tunnel oven technology, specifically to a fully automated tunnel oven production line for integrated processing of pastry fillings. Background Technology

[0002] Fillings for bread and pastries are a core component determining the flavor, texture, and value of the final product. They come in a wide variety, primarily including red bean paste, lotus seed paste, custard, jam, meat fillings, and various innovative compound fillings. These fillings differ significantly in moisture, fat, sugar content, and thermophysical properties, making them extremely sensitive to heat treatment conditions during processing. Ideal filling processing requires precise and uniform heating of the core temperature to a safe cooking range, while the outer crust must achieve the appropriate color and texture. Any deviation in temperature control can easily lead to quality defects such as undercooked fillings, bursting, or overcooked crusts. Therefore, the temperature control precision and heat uniformity of baking equipment place far more stringent requirements than ordinary baking processes.

[0003] To achieve efficient and standardized production, modern bread and pastry filling processing often employs integrated automated production lines. These lines typically integrate modules in a sequential process, including dough preparation, quantitative filling, shaping, traying, baking, and cooling. Among these, baking, a crucial step determining the final product quality, primarily relies on gas-fired tunnel ovens. These ovens use a conveyor belt to continuously transport products through a long, narrow furnace equipped with heating devices, utilizing the heat generated by natural gas combustion for baking. Their design aims to achieve stable and uniform heating of the products while ensuring production efficiency.

[0004] However, existing gas tunnel ovens used in integrated production lines employ flame injectors that are non-uniform "strip" or "matrix" heat sources, rather than completely uniform "area" heat sources. The oven's cross-section is prone to localized high-temperature zones and low-temperature dead zones that are difficult to see with the naked eye, leading to temperature difference risks and causing inconsistencies in color and doneness within the same batch of products. For fillings, insufficient center temperature can result in undercooked fillings, while excessively high temperatures may cause them to burst. Specifically, current burners (such as the technology disclosed in Chinese patent application number 202110411372.3, entitled "A Direct-Fired Intelligent Gas Tunnel Oven") mostly use tubular flame injectors. Although this design achieves zoned intelligent control, its combustion tube is essentially still a linear "strip" or discrete "matrix" heat source with flame holes or grooves along the tube body, rather than a completely uniform "area" heat source. In practice, when this type of heat source couples with the airflow organization inside the furnace, it easily creates localized high-temperature zones and low-temperature dead zones on the cross-section of the furnace that are difficult to detect with the naked eye. This results in poor temperature uniformity in the effective working area inside the furnace, leading to significant temperature difference risks. This non-uniformity directly causes uneven coloring and cooking levels in products from the same batch. For filling products, the harm is particularly prominent: products in the low-temperature zone may not be fully cooked due to insufficient core temperature, posing a safety hazard; while products in the high-temperature zone may experience cracking of the dough due to excessive heating of the internal filling and a surge in steam pressure. Summary of the Invention

[0005] The existing gas tunnel oven's flame injector is a non-uniform "strip" or "matrix" heat source, rather than a completely uniform "area" heat source. The oven's cross-section easily contains localized high-temperature zones and low-temperature dead zones that are difficult to see with the naked eye, leading to temperature difference risks and causing inconsistencies in color and doneness within the same batch of products. For fillings, insufficient center temperature can result in undercooked fillings, while excessively high temperatures may cause them to burst. To achieve the above objectives, this invention provides the following technical solution:

[0006] A fully automated tunnel oven production line for integrated processing of pastry fillings includes a tunnel oven, which comprises an upper oven body and a conveying unit. The conveying unit is assembled inside the upper oven body and conveys bread and pastry fillings within it. Multiple gas combustion assemblies are installed at equal intervals along the conveying unit inside the upper oven body. Each gas combustion assembly includes a gas burner and a positioning frame. One end of the gas burner is mounted inside the positioning frame, which is installed inside the upper oven body. A gas pipe is provided outside the positioning frame to supply gas to the gas burner. The main body of the gas burner is movably mounted on the positioning frame. A fixing block A is fixed to each of the two sides of the positioning frame. An electric telescopic rod A is ball-hinged to fixing block A, and the other end of the electric telescopic rod A is mounted on the upper oven. Inside the oven body, the electric telescopic rod A extends and retracts, causing the gas burner to sway and adjust its orientation to spray flames in different directions, thereby increasing the flame coverage. During the conveying of bread and pastry fillings inside the oven body, the fillings pass through multiple gas combustion assemblies sequentially. After entering the gas combustion assembly, the electric telescopic rod A extends and retracts, causing the gas burner to sway synchronously in all directions, adjusting its orientation to spray flames. This increases the flame coverage, avoids localized high-temperature zones and low-temperature dead zones, and prevents temperature differences that could lead to insufficient center temperature in the fillings, resulting in undercooked fillings or excessively hot fillings that could burst. This also improves the color and doneness of products in the same batch.

[0007] Furthermore, the gas combustion element includes multiple unit combustion elements, which are arranged in a side-by-side array inside the fixed frame; each unit combustion element includes a unit positioning frame and a unit combustion element body, with one end of the unit combustion element body being installed inside the fixed frame; the unit combustion element body is movably mounted on the unit positioning frame, and the unit positioning frame is fixed on the positioning frame.

[0008] Furthermore, the main body of the unit combustion component includes a combustion tube assembly, which includes a gas inlet box and multiple combustion tubes. One end of each combustion tube is hinged to the gas inlet box and connected to the interior of the gas inlet box. The tube body of the combustion tube is hinged to the unit positioning frame.

[0009] Furthermore, the unit positioning frame includes an inner rocking plate, on which a plurality of hinged through holes A are provided. The plurality of hinged through holes A are arrayed on the inner rocking plate, and the plurality of hinged through holes A correspond one-to-one with a plurality of combustion tubes. The tube body of the combustion tube is hinged inside the hinged through hole A.

[0010] Furthermore, the unit positioning frame also includes an outer frame, which is fitted over the inner rocking plate. A gap is reserved between the outer frame and the inner rocking plate, and they are independent of each other. A fixing block B is fixed on each of the two sides of the inner rocking plate. An electric telescopic rod B is ball-hinged to the fixing block B, and the other end of the electric telescopic rod B is fixed to the inner wall of the outer frame.

[0011] Furthermore, the gas inlet box includes an outer casing, which is fixed inside a fixed frame; the gas inlet box also includes multiple inner casings, which are arranged in an array inside the outer casing. Each inner casing corresponds to a combustion pipe, and the end of the combustion pipe is hinged to the inside of a hinged through hole B at the bottom of the inner casing and communicates with the inner casing; the tops of both the outer casing and the inner casings are open, and the outer casing and the inner casings are interconnected.

[0012] Furthermore, the unit combustion component body includes a flow rate regulating component, which is installed on the outer casing. The outer casing is connected to a gas pipe, which is used to supply gas to the interior of multiple inner casings through the outer casing. The flow rate regulating component is used to control the flow rate of gas supplied from the outer casing to the interior of the multiple inner casings.

[0013] Furthermore, the flow rate regulating component includes a support plate and an electric telescopic rod C. One end of the electric telescopic rod C is fixed at the center of the support plate, and the other end is fixed at the center of the outer casing. The support plate is movably inserted through the opening at the top of the outer casing, and the dimensions of the support plate and the outer casing are matched. A sealing ring is provided between the support plate and the outer casing.

[0014] Furthermore, the support plate has multiple frustums fixed on one side inside the outer box, with each frustum corresponding to a different inner box; the frustums are smaller at the end closer to the inner box and larger at the end further away from the inner box.

[0015] Furthermore, the combustion tube includes a combustion tube body, on which a hinge ball A and a hinge ball B are provided. The hinge ball A is located above the hinge ball B. The hinge ball A is used to hinge the combustion tube body to the gas inlet box; the hinge ball A is also used to hinge the combustion tube body to the unit positioning frame.

[0016] In summary, inside the tunnel oven, when the conveyor unit carrying bread and pastry fillings of different shapes and thicknesses passes through multiple gas combustion assemblies in sequence, the tunnel oven initiates the following coordinated workflow:

[0017] First layer: Global directional sweep of the gas combustion assembly

[0018] The electric telescopic rod A drives the entire gas combustion component to sway synchronously and regularly around; this changes the macroscopic direction of the flame jet, which is equivalent to allowing the heat source to actively inspect the cross-section of the furnace, breaking the static thermal field pattern caused by traditional fixed burners, expanding the basic coverage of the flame as a whole, and effectively reducing the inherent high-temperature zone and low-temperature dead zone caused by the fixed heat source.

[0019] Second layer: Local angle fine-tuning of the combustion tube cluster

[0020] Based on the global swaying, multiple unit combustion components within each gas combustion assembly can be independently controlled; by activating their respective electric telescopic rods B, the combustion tube clusters inside can be driven to sway at different angles and amplitudes. This is equivalent to point-to-point heat supplementation and angle optimization for specific areas of the tunnel furnace (e.g., locations requiring additional heat due to unique product shapes or thick stacking) under the global sweeping thermal background, achieving precise shaping of the local thermal field.

[0021] The third layer: precise quantitative supply of gas flow.

[0022] In sync with the aforementioned physical angle adjustment, the flow rate adjustment component is controlled by the electric telescopic rod C; the depth of the truncated pyramid inserted into the air inlet of the inner box enables stepless and linear adjustment of the gas flow rate to each cluster of combustion tubes; the whole system can not only change the direction of the flame, but also adjust the "firepower" of each cluster of flames in real time and independently, providing the ultimate control means for the spatial and intensity distribution of heat.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. During the process of conveying bread and pastry fillings inside the upper oven body, the bread and pastry fillings will pass through multiple gas combustion assemblies in sequence. After the bread and pastry fillings enter the gas combustion assemblies, the electric telescopic rod A extends and retracts, causing the gas burners to sway synchronously in all directions. This adjusts the gas burners to different orientations for flame spraying, thereby increasing the flame coverage and avoiding localized high-temperature zones and low-temperature dead zones. This prevents the risk of insufficient temperature in the center of the bread and pastry fillings, which can lead to undercooked fillings or the fillings bursting due to excessive heat. This also improves the color and doneness of products in the same batch.

[0025] 2. The electric telescopic rod B is activated by one or more units of the combustion components. The electric telescopic rod B drives the inner rocking plate and multiple combustion tubes to shake through extension and retraction, so that multiple combustion tubes can be adjusted to spray flames in different directions, thereby increasing the local flame coverage. This is beneficial for adapting to different arrangements and thicknesses of bread, pastry fillings inside the tunnel oven, and for flexibly providing heat at different angles to accommodate the different arrangements and thicknesses of bread, pastry fillings that may be continuously transported to the tunnel oven by the baking conveyor unit.

[0026] 3. Activate the electric telescopic rod C to extend and retract, completing the adjustment of the distance between the support plate and the inner box. As the support plate approaches the inner box, multiple truncated pyramids will continuously insert into multiple inner boxes. Since the truncated pyramids are small at the end closer to the inner box and large at the end farther from the inner box, the flow rate adjustment component controls the flow rate of gas from the outer box to the interior of multiple inner boxes. This allows the amount of gas entering the combustion tube through the inner box to control the fire intensity and promotes the flexible provision of different amounts of heat by the combustion tubes on multiple unit combustion components to adapt to the different arrangements and thicknesses of bread, pastry fillings that may be continuously transported to the tunnel oven by the baking conveyor unit.

[0027] 4. Multiple independently adjustable combustion tubes spray dynamically changing flame streams into space. These airflows interfere and pull with each other, potentially creating multiple micro-sized, dynamic vortex heat flow fields within the furnace. This vortex flow greatly promotes the three-dimensional mixing of hot air inside the furnace, with effects far superior to traditional forced hot air circulation. Heat is no longer solely distributed through diffusion and conduction, but is actively stirred into every corner by these vortices, potentially reducing the temperature difference across the furnace cross-section to extremely low levels, achieving unprecedented thermal uniformity, and fundamentally eliminating the problem of inconsistent cooking times and colors in the same batch of products.

[0028] 5. When a product with double the thickness suddenly appears on the conveyor unit, the combustion tube in the corresponding area can adjust its angle, concentrate the firepower, and increase the gas flow to dynamically focus the heating of the product, ensuring that its central filling and the thinner product are cooked synchronously within the same time period; thus realizing the leap from batch processing to personalized processing;

[0029] 6. The flow rate regulator allows for precise metering control of the gas supply to each cluster of combustion tubes; it can truly achieve "give heat where it is needed, and give it as much as needed"; in traditional tunnel furnaces, in order to compensate for the coldest point or the thickest product, the entire heating zone is often forced into an overheated state, resulting in huge energy waste; while this application can provide the necessary heat only at the necessary points, and the overall firepower can operate at a lower level while meeting the process requirements; this dynamic energy optimization allocation based on space and demand brings energy-saving effects far exceeding expectations. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1This is a schematic diagram of the structure of the tunnel oven fully automated production line for integrated processing of pastry fillings according to the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of the structure of a medium tunnel furnace;

[0033] Figure 3 This is a schematic diagram of the gas combustion assembly in this invention;

[0034] Figure 4 for Figure 3 Schematic diagram of the structure of the unit combustion component;

[0035] Figure 5 for Figure 4 A schematic diagram of the structure of the unit positioning frame;

[0036] Figure 6 for Figure 4 Schematic diagram of the main structure of the combustion component in the middle unit;

[0037] Figure 7 for Figure 6 Exploded view of the main body of the combustion component in the middle unit;

[0038] Figure 8 for Figure 7 Schematic diagram of the combustion tube assembly;

[0039] Figure 9 for Figure 8 Schematic diagram of the combustion tube structure;

[0040] Figure 10 for Figure 8 Schematic diagram of the gas inlet box;

[0041] Figure 11 for Figure 7 A schematic diagram of the medium-throughput regulating component.

[0042] Legend:

[0043] 1. Molding unit; 2. Cleaning room; 3. Rewind line; 4. Automatic food preparation conveyor line; 5. Automatic packaging machine; 6. Post-packaging conveyor line; 7. Demolding machine; 8. Spiral cooling tower; 9. Tunnel furnace; 10. Vertical proofing unit; 91. Upper furnace body; 92. Lower furnace body; 93. Control panel; 94. Conveying unit; 95. Gas combustion assembly; 96. Gas combustion element; 97. Gas pipe; 98. Electric telescopic rod A; 99. Positioning frame; 961. Unit combustion element; 962. Unit positioning frame; 963. Unit combustion element body; 964. Combustion tube assembly; 965. Flow rate adjustment. Component 965; fixed frame 971, fixed block A981; outer frame 9621, inner rocking plate 9622, hinged through hole A9623, electric telescopic rod B9624, fixed block B9625; gas inlet box 9641, combustion pipe 9642; support plate 9651, frustum 9652, electric telescopic rod C9653; outer box 96411, inner box 96412, hinged through hole B96413; hinged ball A96421, hinged ball B96422, combustion pipe body 96423. Detailed Implementation

[0044] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0045] In embodiments of the present invention, such as Figure 1 and Figure 2 As shown: A fully automated tunnel oven production line for integrated processing of pastry fillings includes a tunnel oven 9, which includes an upper oven body 91 and a conveying unit 94. The conveying unit 94 is assembled inside the upper oven body 91 and conveys bread and pastry fillings inside it. Multiple gas combustion assemblies 95 are installed at equal intervals along the conveying unit 94 inside the upper oven body 91.

[0046] It should be noted that: the upper furnace body 91 is assembled on the lower furnace body 92, and the operation panel 93 is installed on the upper furnace body 91; the conveying unit 94 is located between the upper furnace body 91 and the lower furnace body 92; the upper furnace body 91, the lower furnace body 92, the operation panel 93 and the conveying unit 94 are not described in detail because they are all existing technologies and can be purchased directly on the market or assembled by purchasing parts, etc. Whether they are publicly available or not does not affect the gas combustion assembly 95 to be protected, and will not be elaborated on here.

[0047] The production line also includes a molding unit 1, a spiral cooling tower 8, and a vertical proofing unit 10. Multiple spiral cooling towers 8 are provided and are located on the side of one end of the tunnel furnace 9. A demolding machine 7 is also provided on the side of one end of the tunnel furnace 9, and the demolding machine 7 is located on one side of the spiral cooling tower 8. An automatic food preparation conveyor line 4 is provided on the side of the spiral cooling tower 8 away from the tunnel furnace 9. An automatic packaging machine 5 and a post-packaging conveyor line 6 are provided on the side of the automatic food preparation conveyor line 4.

[0048] The vertical proofing unit 10 is located at the other end of the tunnel furnace 9. The side of the vertical proofing unit 10 is provided with a cleaning room 2 and a return line 3. The forming unit 1 is installed at the end of the vertical proofing unit 10 away from the tunnel furnace 9.

[0049] The reason why "forming unit 1, cleaning room 2, return line 3, automatic food preparation conveyor line 4, automatic packaging machine 5, post-packaging transport line 6, demolding machine 7, spiral cooling tower 8 and vertical proofing unit 10" are not described in detail is that they are all existing technologies and can be purchased directly on the market or assembled by purchasing parts, etc. Whether they are disclosed or not does not affect the gas combustion assembly 95 to be protected, so they will not be elaborated on here.

[0050] Please continue reading. Figure 3 The gas combustion assembly 95 includes a gas combustion element 96 and a positioning frame 99. One end of the gas combustion element 96 is installed inside the fixing frame 971, which is installed inside the upper furnace body 91. A gas pipe 97 is provided outside the fixing frame 971, which is used to supply gas to the gas combustion element 96.

[0051] It should be noted that the gas pipe 97 is ring-shaped and is connected to an external gas cylinder or municipal gas cylinder, etc., through a connecting pipe. These are all existing technologies. The detailed structure can be found in existing literature and journals. They can also be purchased directly on the market or assembled from components purchased on the market. They are not what this invention is meant to protect, so they will not be described in detail here, nor are they shown in the accompanying drawings.

[0052] The main body of the gas burner 96 is movably mounted on the positioning frame 99. A fixing block A981 is fixed on each of the two sides of the positioning frame 99. An electric telescopic rod A98 is ball-hinged on the fixing block A981. The other end of the electric telescopic rod A98 is installed inside the upper furnace body 91.

[0053] The extension and retraction of the electric telescopic rod A98 causes the gas burner 96 to sway, adjusting the direction of the gas burner 96 to spray flame in different directions, thereby increasing the coverage of the flame.

[0054] It should be noted that there are two electric telescopic rods A98: one at the front of the positioning frame 99 and the other on the right side of the positioning frame 99. However, the arrangement is not limited to two positions; one could be at the front and the other on the left, or one at the rear and the other on the right, or one at the front and the other on the right, etc. The specific arrangement is not restricted, as long as it allows the gas burner 96 to be moved and its orientation adjusted by the extension and retraction of the electric telescopic rod A98, thus enabling flame emission. Preferably, one electric telescopic rod A98 is positioned at the front of the positioning frame 99 and the other on the right side of the positioning frame 99.

[0055] In summary, during the process of conveying bread and pastry fillings inside the upper oven body 91 by the conveying unit 94, the bread and pastry fillings will pass through multiple gas combustion assemblies 95 in sequence. After the bread and pastry fillings enter the gas combustion assembly 95, the gas burner 96 will be moved synchronously around by the extension and retraction of the electric telescopic rod A98, thereby adjusting the gas burner 96 to different orientations for flame emission. This improves the coverage of the flame and avoids local high-temperature zones and low-temperature dead zones, which could lead to insufficient temperature in the center of the bread and pastry filling, resulting in undercooked fillings or the fillings bursting due to excessive heat. This also improves the color and doneness of the same batch of products.

[0056] In embodiments of the present invention, such as Figure 3 and Figure 4 As shown: The gas combustion element 96 includes multiple unit combustion elements 961, which are arranged in a side-by-side array inside the fixed frame 971; each unit combustion element 961 includes a unit positioning frame 962 and a unit combustion element body 963, with one end of the unit combustion element body 963 being installed inside the fixed frame 971; the unit combustion element body 963 is movably mounted on the unit positioning frame 962, and the unit positioning frame 962 is fixed on the positioning frame 99.

[0057] In embodiments of the present invention, such as Figures 6-8 As shown: The unit combustion component body 963 includes a combustion tube assembly 964, which includes a gas inlet box 9641 and multiple combustion tubes 9642. One end of each combustion tube 9642 is hinged to the gas inlet box 9641 and connected to the interior of the gas inlet box 9641. The tube body of each combustion tube 9642 is hinged to the unit positioning frame 962.

[0058] like Figures 4-6As shown: The unit positioning frame 962 includes an inner rocking plate 9622, on which a plurality of hinged through holes A9623 are provided. The plurality of hinged through holes A9623 are arranged in an array on the inner rocking plate 9622, and the plurality of hinged through holes A9623 correspond one-to-one with a plurality of combustion tubes 9642. The tube body of the combustion tube 9642 is hinged inside the hinged through hole A9623.

[0059] like Figures 4-6 As shown: The unit positioning frame 962 also includes an outer frame 9621, which is sleeved on the outside of the inner rocking plate 9622. A gap is reserved between the outer frame 9621 and the inner rocking plate 9622, and they are independent of each other. A fixing block B9625 is fixed on each of the two sides of the inner rocking plate 9622. An electric telescopic rod B9624 is ball-hinged on the fixing block B9625, and the other end of the electric telescopic rod B9624 is fixed to the inner wall of the outer frame 9621.

[0060] It should be noted that there are two electric telescopic rods B9624: one is located at the front end of the inner rocking plate 9622, and the other is located on the right side of the inner rocking plate 9622. However, the locations are not limited to two; one could be at the front and the other on the left, or one at the rear and the other on the right, or one at the front and the other on the right, etc. The specific arrangement is not limited, as long as it satisfies the requirement that the extension and retraction of the electric telescopic rod A98 can cause the gas burner 96 to sway and adjust its orientation to different directions for flame emission. Preferably, one electric telescopic rod B9624 is located at the front end of the inner rocking plate 9622, and the other on the right side of the inner rocking plate 9622.

[0061] Therefore, when multiple or more unit combustion components 963 activate the electric telescopic rod B9624, the electric telescopic rod B9624 drives the inner rocking plate 9622 and multiple combustion tubes 9642 to sway through telescopic movement, so that multiple combustion tubes 9642 can adjust to different directions to spray flame, thereby increasing the local flame coverage. This is beneficial for adapting to different arrangements and thicknesses of bread, pastry fillings inside the tunnel oven 9, and for flexibly providing heat at different angles to adapt to the different arrangements and thicknesses of bread, pastry fillings that may be continuously transported to the tunnel oven 9 by the baking conveyor unit 94.

[0062] In embodiments of the present invention, such as Figure 8 and Figure 10As shown: The gas inlet box 9641 includes an outer box 96411, which is fixed inside the fixing frame 971; the gas inlet box 9641 also includes multiple inner boxes 96412, which are arrayed inside the outer box 96411. The multiple inner boxes 96412 correspond one-to-one with multiple combustion pipes 9642. The end of the combustion pipe 9642 is hinged to the hinged through hole B96413 opened at the bottom of the inner box 96412 and communicates with the inner box 96412; the tops of both the outer box 96411 and the inner box 96412 are open, and the outer box 96411 and the inner box 96412 are interconnected.

[0063] like Figure 6 , Figure 7 , Figure 10 and Figure 11 As shown: The unit combustion component body 963 includes a flow rate regulating component 965, which is installed on the outer casing 96411. The outer casing 96411 is connected to a gas pipe 97, which is used to supply gas to the interior of multiple inner casings 96412 through the outer casing 96411. The flow rate regulating component 965 is used to regulate the flow rate of gas supplied from the outer casing 96411 to the interior of multiple inner casings 96412.

[0064] like Figure 6 , Figure 7 , Figure 10 and Figure 11 As shown: The flow rate regulating component 965 includes a support plate 9651 and an electric telescopic rod C9653. One end of the electric telescopic rod C9653 is fixed at the center of the support plate 9651, and the other end is fixed at the center inside the outer housing 96411. The support plate 9651 is movably inserted through the opening at the top of the outer housing 96411, and the dimensions of the support plate 9651 and the outer housing 96411 are matched. A sealing ring is provided between the support plate 9651 and the outer housing 96411.

[0065] like Figure 10 and Figure 11 As shown: The support plate 9651 has multiple frustums 9652 fixed on one side inside the outer box 96411. The multiple frustums 9652 correspond one-to-one with the multiple inner boxes 96412. The frustums 9652 are smaller at the end closer to the inner box 96412 and larger at the end farther away from the inner box 96412.

[0066] Therefore, by activating the electric telescopic rod C9653 to extend and retract, the distance between the support plate 9651 and the inner chamber 96412 is adjusted. During the process of the support plate 9651 approaching the inner chamber 96412, multiple truncated pyramids 9652 will continuously be inserted into multiple inner chambers 96412. Since the truncated pyramids 9652 are shaped such that the end closer to the inner chamber 96412 is smaller and the end farther away from the inner chamber 96412 is larger, the flow rate adjustment component 965 can regulate the flow rate of gas from the outer chamber 96411 to the multiple inner chambers 96412. This allows the amount of gas entering the combustion tube 9642 through the inner chamber 96412 to be controlled, which is beneficial for controlling the firepower and promoting the flexible provision of different amounts of heat by the combustion tubes 9642 on the main body 963 of multiple local combustion components. This adapts to the different arrangements and thicknesses of bread, pastry fillings that may be continuously transported to the tunnel oven 9 by the baking conveyor unit 94.

[0067] In embodiments of the present invention, such as Figure 5 , Figure 9 and Figure 10 As shown: The combustion tube 9642 includes a combustion tube body 96423, on which a hinge ball A96421 and a hinge ball B96422 are provided. The hinge ball A96421 is located above the hinge ball B96422. The hinge ball A96421 is used to hinge the combustion tube body 96423 to the gas inlet box 9641 (specifically, the hinge ball A96421 is used to hinge the combustion tube body 96423 to the hinge through hole B96413); the hinge ball A96421 is also used to hinge the combustion tube body 96423 to the unit positioning frame 962 (specifically, the hinge ball A96421 is used to hinge the combustion tube body 96423 to the hinge through hole B96413).

[0068] In summary, inside the tunnel oven 9, when the conveying unit 94 carrying bread and pastry fillings of different shapes and thicknesses passes through multiple gas combustion assemblies 95 in sequence, the tunnel oven 9 initiates the following coordinated workflow:

[0069] First layer: Global directional sweep of the gas combustion assembly (95%)

[0070] The electric telescopic rod A98 drives the entire gas combustion component 91 to sway synchronously and regularly around; this changes the macroscopic direction of the flame jet, which is equivalent to allowing the heat source to actively inspect the cross-section of the furnace, breaking the static thermal field pattern caused by traditional fixed burners, expanding the basic coverage of the flame as a whole, and effectively reducing the inherent high temperature zone and low temperature dead zone caused by fixed heat source.

[0071] Second layer: Local angle fine-tuning of the 9642 combustion tube cluster

[0072] Based on the global swaying, multiple unit combustion components 963 within each gas combustion assembly 95 can be independently controlled; by activating their respective electric telescopic rods B9624, the internal combustion tube clusters 9642 can be driven to sway at different angles and amplitudes. This is equivalent to point-to-point heat supplementation and angle optimization for specific areas of the tunnel furnace 9 (e.g., locations requiring additional heat due to unique product shapes or thick accumulation) under the global sweeping thermal background, achieving precise shaping of the local thermal field.

[0073] The third layer: precise quantitative supply of gas flow.

[0074] In sync with the aforementioned physical angle adjustment, the flow rate adjustment component is controlled by the electric telescopic rod C9653; the depth to which the frustum 9652 is inserted into the air inlet of the inner housing 96412 enables stepless and linear adjustment of the gas flow rate to each cluster of combustion tubes; the whole system can not only change the direction of the flame, but also adjust the "firepower" of each cluster of flames in real time and independently, providing the ultimate control means for the spatial and intensity distribution of heat.

[0075] Multiple independently adjustable combustion tubes (9642) eject dynamically changing flame streams into space. These airflows interfere and pull with each other, potentially creating multiple micro-sized, dynamic vortex heat flow fields within the furnace. This vortex flow greatly promotes the three-dimensional mixing of hot air within the furnace, with effects far superior to traditional forced hot air circulation. Heat is no longer solely distributed through diffusion and conduction, but is actively stirred into every corner by these vortices, potentially reducing the temperature difference across the furnace cross-section to extremely low levels, achieving unprecedented thermal uniformity, and fundamentally eliminating the problem of inconsistent cooking times and colors in the same batch of products.

[0076] When a product with double the thickness suddenly appears on the conveyor unit 94, the combustion tube 9642 in the corresponding area can adjust its angle, concentrate the firepower, and increase the gas flow to dynamically focus the heating of the product, ensuring that the filling in the center and the thinner product are cooked synchronously in the same time period; thus realizing the leap from batch processing to personalized processing.

[0077] The flow rate regulator 965 allows for precise metering control of the gas supply to each cluster of combustion tubes 9642; it can truly achieve "giving heat where it is needed, and giving it as much as needed"; in traditional tunnel furnaces, in order to compensate for the coldest point or the thickest product, the entire heating zone is often forced into an overheated state, resulting in huge energy waste; while this application can provide the necessary heat only at the necessary points, and the overall firepower can operate at a lower level while meeting the process requirements; this dynamic energy optimization allocation based on space and demand brings energy-saving effects far exceeding expectations.

[0078] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0079] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A fully automated tunnel oven production line for integrated processing of pastry fillings, comprising a tunnel oven (9), said tunnel oven (9) comprising an upper oven body (91) and a conveying unit (94), the conveying unit (94) being assembled inside the upper oven body (91) and conveying bread and pastry fillings therein; characterized in that, Multiple gas combustion assemblies (95) are installed at equal intervals along the conveying unit (94) inside the upper furnace body (91). The gas combustion assembly (95) includes a gas combustion element (96) and a positioning frame (99). One end of the gas combustion element (96) is installed inside the fixing frame (971), which is installed inside the upper furnace body (91). A gas pipe (97) is provided outside the fixing frame (971), which is used to supply gas to the gas combustion element (96). The main body of the gas combustion component (96) is movably set on the positioning frame (99). A fixing block A (981) is fixed on each of the two sides of the positioning frame (99). An electric telescopic rod A (98) is ball-hinged on the fixing block A (981). The other end of the electric telescopic rod A (98) is installed inside the upper furnace body (91). The gas burner (96) is moved by the extension and retraction of the electric telescopic rod A (98), which adjusts the gas burner (96) to spray flame in different directions to increase the coverage of the flame.

2. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 1, characterized in that, The gas combustion element (96) includes multiple unit combustion elements (961), which are arranged in a side-by-side array inside the fixed frame (971). Each unit combustion element (961) includes a unit positioning frame (962) and a unit combustion element body (963). One end of the unit combustion element body (963) is installed inside the fixed frame (971). The unit combustion element body (963) is movably set on the unit positioning frame (962), and the unit positioning frame (962) is fixed on the positioning frame (99).

3. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 2, characterized in that, The unit combustion component body (963) includes a combustion tube assembly (964), which includes a gas inlet box (9641) and multiple combustion tubes (9642). One end of each combustion tube (9642) is hinged to the gas inlet box (9641) and connected to the interior of the gas inlet box (9641). The tube body of each combustion tube (9642) is hinged to the unit positioning frame (962).

4. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 3, characterized in that, The unit positioning frame (962) includes an inner rocking plate (9622), on which a plurality of hinged through holes A (9623) are provided. The plurality of hinged through holes A (9623) are arranged in an array on the inner rocking plate (9622), and the plurality of hinged through holes A (9623) correspond one-to-one with a plurality of combustion tubes (9642). The tube body of the combustion tube (9642) is hinged inside the hinged through hole A (9623).

5. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 4, characterized in that, The unit positioning frame (962) also includes an outer frame (9621), which is fitted outside the inner rocking plate (9622). A gap is reserved between the outer frame (9621) and the inner rocking plate (9622), and they are independent of each other. A fixing block B (9625) is fixed on each of the two sides of the inner rocking plate (9622). An electric telescopic rod B (9624) is ball-hinged on the fixing block B (9625), and the other end of the electric telescopic rod B (9624) is fixed on the inner wall of the outer frame (9621).

6. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 3, characterized in that, The gas inlet box (9641) includes an outer box (96411) which is fixed inside a fixed frame (971). The gas inlet box (9641) also includes multiple inner boxes (96412), which are arranged in an array inside the outer box (96411). The multiple inner boxes (96412) correspond one-to-one with multiple combustion tubes (9642). The end of the combustion tube (9642) is hinged to the inside of the hinged through hole B (96413) at the bottom of the inner box (96412) and communicates with the inner box (96412). The tops of the outer box (96411) and the inner box (96412) are open, and the outer box (96411) and the inner box (96412) are interconnected.

7. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 6, characterized in that, The unit combustion component body (963) includes a flow rate regulating component (965), which is installed on the outer casing (96411). The outer casing (96411) is connected to a gas pipe (97), which is used to supply gas to multiple inner casings (96412) through the outer casing (96411). The flow rate regulating component (965) is used to regulate the flow rate of gas supplied from the outer casing (96411) to the multiple inner casings (96412).

8. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 7, characterized in that, The flow rate regulating component (965) includes a support plate (9651) and an electric telescopic rod C (9653). One end of the electric telescopic rod C (9653) is fixed at the center of the support plate (9651), and the other end is fixed at the center inside the outer casing (96411). The support plate (9651) is movably inserted through the opening at the top of the outer casing (96411), and the dimensions of the support plate (9651) and the outer casing (96411) are matched. A sealing ring is provided between the support plate (9651) and the outer casing (96411).

9. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 8, characterized in that, The support plate (9651) has multiple frustums (9652) fixed on one side inside the outer box (96411). The multiple frustums (9652) correspond one-to-one with the multiple inner boxes (96412). The frustums (9652) are smaller at the end closer to the inner box (96412) and larger at the end farther away from the inner box (96412).

10. The tunnel oven fully automated production line for integrated processing of pastry fillings according to claim 3, characterized in that, The combustion tube (9642) includes a combustion tube body (96423), on which a hinge ball A (96421) and a hinge ball B (96422) are provided. The hinge ball A (96421) is located above the hinge ball B (96422). The hinge ball A (96421) is used to hinge the combustion tube body (96423) to the gas inlet box (9641). The hinge ball A (96421) is used to hinge the combustion tube body (96423) to the unit positioning frame (962).

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