A food frying production line

Abstract

The application provides a food oil-frying production line, which comprises a production line bottom plate, an oil storage and heating assembly and a filtering and adding assembly installed on the top surface of the production line bottom plate; the oil storage and heating assembly comprises a main oil-frying pot; the filtering and adding assembly comprises a filtering frame fixedly connected to the top surface of the production line bottom plate, filtering cylinders fixed to the filtering frame respectively, a circulating pump and a preheating and adding part. The filtering and adding assembly continuously pumps the hot oil in the main oil-frying pot into the filtering cylinders, and the hot oil flows through the annular filter disc to realize impurity filtering. Meanwhile, the circulating hot oil surrounding the preheating inner container continuously and uniformly indirectly preheats the new oil stored in the filtering cylinders. The preheated new oil is precisely controlled by the liquid leakage assembly provided with a flow adjusting mechanism at the bottom of the preheating inner container, and after the preheated new oil drops into the filtering cylinders, it is immediately fully mixed with a large amount of filtered hot oil, and then is sent back to the main oil-frying pot by the circulating pump, so that the impact of the low-temperature new oil on the working oil temperature is avoided.

Description

Technical Field

[0001] This invention relates to the field of food frying production technology, specifically to a food frying production line. Background Technology

[0002] In the food industry, frying is a widely used processing method to impart unique texture, color, and flavor to food. Currently, large-scale production mainly relies on continuous food frying production lines. A typical workflow is as follows: First, edible oil is injected into a rectangular frying tank, and then the oil is heated to the preset frying temperature by a heating device at the bottom of the tank. After production starts, the food to be fried (such as French fries, chicken nuggets, etc.) is fed into the frying tank from the inlet end by a conveyor (usually a metal mesh belt). Driven by the conveyor, the food moves forward at a uniform speed, submerged or partially submerged in the high-temperature oil, completing processes such as frying, shaping, and coloring during this process. Finally, the fried food is lifted out of the oil by a conveyor at the outlet end of the frying tank for draining and subsequent collection. However, the aforementioned traditional continuous frying production line has the following technical defects in actual operation: During continuous production, the oil in the frying tank will continuously decrease due to high-temperature evaporation, food carryover, and decomposition. To maintain the oil level required for normal production, new cold oil (i.e., oil that has not been preheated and is at room temperature or storage temperature) must be added to the tank in real time or intermittently. The direct injection of this cold oil will rapidly mix with the hot oil in the tank that is already at the working temperature, causing a momentary drop in the oil temperature in some areas or even the whole frying tank. The aforementioned oil temperature issue presents the following drawbacks: If the conveyor is not stopped to maintain production continuity, the food passing through during the period before the oil temperature returns to the process setting will suffer from frying defects due to insufficient heat supply. For example, the surface gelatinized layer may not set quickly, leading to increased oil content, uneven color, and a lack of crispness, severely affecting the stability of product quality. If production is suspended to ensure product quality, the cold oil awaiting replenishment will be reheated to the set temperature, resulting in frequent production line interruptions and time gaps between conveyor start-ups and shutdowns. This not only reduces the effective utilization rate of the equipment and overall production efficiency but also makes it difficult to control the production rhythm and increases discontinuous energy consumption. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a food frying production line that solves the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A food frying production line includes a production line base plate, an oil storage and heating assembly installed on the top surface of the production line base plate, and a filtration and addition assembly. The oil storage and heating assembly includes a main frying hopper for holding heated oil. The filtration and addition assembly includes a filter frame fixedly connected to the top surface of the production line base plate, filter cylinders respectively fixed on the filter frame, a circulating pump, and a preheating and addition component. The filter cylinders are connected to the main frying hopper via a return pipe to receive hot oil, and have removable and cleanable annular filter discs inside. The input end of the circulating pump is connected to the bottom of the filter cylinder via a drain pipe. The output end is connected to the main frying hopper via a liquid flow pipe to form an oil filtration circulation loop. The preheating and adding component includes a preheating inner liner located in the middle area of ​​the annular filter disc inside the filter cylinder, and a storage component for conveying the stored new oil to the preheating inner liner. The preheating inner liner is surrounded by circulating hot oil flowing through the annular filter disc to indirectly preheat the new oil. A leakage component is provided at its bottom so that the preheated new oil drips into the filter cylinder and mixes with the filtered hot oil. Finally, it is pumped back to the main frying hopper by the circulation pump to achieve constant temperature oil replenishment.

[0005] This invention provides a food frying production line. Compared with the prior art, it has the following advantages: To address the problem of drastic temperature fluctuations in the frying zone caused by directly adding cold oil to traditional production lines, which affects product quality and production continuity, this invention proposes a filter addition component. This component continuously pumps hot oil from the main frying hopper into a filter cylinder, where it flows through an annular filter disc to filter impurities. Simultaneously, the circulating hot oil surrounding the preheating inner tank continuously and uniformly preheats the new oil stored inside. The preheated oil is precisely controlled through a leakage component with a flow regulation mechanism at the bottom of the preheating inner tank. After dripping into the filter cylinder, the preheated oil immediately mixes thoroughly with a large amount of filtered hot oil before being pumped back to the main frying hopper. This avoids the impact of low-temperature new oil on the working oil temperature and ensures the stability of the frying process temperature.

[0006] To address the problem of food debris accumulating and carbonizing at the bottom of the frying tank, accelerating oil cracking, and forming a heat insulation layer on the heating surface, this invention incorporates an automatic cleaning mechanism driven by the return oil flow into the oil storage and heating assembly. Oil pumped back from the filter and addition assembly to the main frying hopper is guided to an arc-shaped cleaning plate designed at the bottom of the hopper. The impact force of the oil flow drives the cleaning shaft to rotate, causing the arc-shaped cleaning plate to continuously scrape the bottom surface of the main frying hopper, collecting debris and pushing it into a sediment collection cylinder connected to the bottom. Simultaneously, a coaxially fixed scraper at the bottom of the cylinder rotates synchronously, scraping away debris from the bottom of the sediment collection cylinder, allowing it to enter the filtration system through the return pipe with the oil flow, thus removing sediment and significantly slowing down the oil oxidation rate.

[0007] This invention adjusts the height of the pressure screen drive frame using a pressure screen height adjustment cylinder, allowing the floating pressure screen plate to adapt to foods of different thicknesses. The floating pressure screen plate is driven by chain transmission and can move synchronously with the conveyor chain, providing stable pressure to the food throughout the process, ensuring that it is completely submerged and heated evenly. At the same time, the conveyor chain forms a U-shaped trajectory with high ends and low middle under the action of the sprocket pressure roller, significantly improving production efficiency. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0009] Figure 1 An overall schematic diagram of the present invention is shown; Figure 2 This diagram shows another perspective view of the overall invention; Figure 3 A schematic diagram of the filter addition component of the present invention is shown; Figure 4 This diagram shows a partially enlarged schematic of the filter addition component of the present invention; Figure 5 A partial cross-sectional schematic diagram of the filter addition component of the present invention is shown; Figure 6 A partial cross-sectional schematic diagram of the filter cartridge of the present invention is shown; Figure 7 A schematic diagram of the preheating addition component of the present invention is shown; Figure 8 A schematic diagram of the oil storage heating assembly of the present invention is shown; Figure 9 A partial cross-sectional schematic diagram of the oil storage heating assembly of the present invention is shown; Figure 10 A schematic diagram of the smoke extraction assembly of the present invention is shown; Figure 11 A schematic diagram of the pressing component and the conveying component of the present invention is shown; Figure 12 A schematic diagram of the pressing component of the present invention is shown; Figure 13 A partial cross-sectional schematic diagram of the pressing component of the present invention is shown; Figure 14 A schematic diagram of the conveying assembly of the present invention is shown; Figure 15 This diagram shows another perspective view of the delivery component of the present invention; Figure 16 A partial cross-sectional schematic diagram of the conveying assembly of the present invention is shown; Figure 17 The present invention is shown. Figure 16 Enlarged schematic diagram of region A in the middle.

[0010] As shown in the figure: 100. Production line base plate; 200. Oil storage and heating assembly; 201. Main frying hopper; 202. Sludge collection cylinder; 203. Cleaning shaft; 204. Bottom scraper; 205. Arc-shaped cleaning plate; 206. Oil guide hole; 300. Portal frame; 400. Smoke exhaust assembly; 401. Smoke hood lifting cylinder; 402. Smoke hood body; 403. Smoke exhaust pipe; 500. Pressing assembly; 501. Pressing height adjustment cylinder; 502. Pressing drive frame; 503. Drive motor; 504. Drive shaft; 505. Driven shaft; 506. Main sprocket; 507. Sprocket; 508. Reciprocating chain; 509. Floating pressing plate; 510. Chain guide wheel; 600. Conveying assembly; 601. Conveyor lifting cylinder; 602. Auxiliary heating element; 603. Conveying frame; 604. Oil filter hole; 605. Conveying motor; 606. Conveying main shaft; 607. Conveying driven shaft; 608. Conveying main sprocket; 609. Conveying driven sprocket; 610. Conveying chain; 611. Sprocket pressure roller; 612. Food support plate; 613. Food positioning groove; 700. Filter addition assembly; 701. Filter frame; 702. Filter cylinder; 703. Return pipe; 704. Drain pipe; 705. Circulation pump; 706. Liquid flow pipe; 707. Filter disc positioning seat; 708. Annular filter disc; 709. Annular baffle cylinder; 710. Sealing top cover lifting cylinder; 711. Lifting frame; 712. Sealing top cover; 713. Preheating inner tank; 714. Leakage hole; 715. Rotary motor; 716. Rotary shaft; 717. Rotary disc; 718. Adjusting valve hole; 719. Oil reservoir; 720. Oil reservoir; 721. Replenishment pump; 722. New oil suction pipe; 723. New oil injection pipe. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] As an embodiment of the present invention, combined with Figure 1 - Figure 17As shown, to solve the technical problems in the background art, a food frying production line is provided, comprising: The production line consists of a base plate (100), an oil storage and heating assembly (200), a gantry frame (30), a smoke exhaust assembly (400), a pressure assembly (500), a conveying assembly (600), and a filter addition assembly (700). It should be noted that... To address the problem of sudden temperature drops in continuous frying production caused by direct replenishment of cold oil, which affects product quality and production continuity, this invention proposes a production line base plate 100 with an oil storage and heating assembly 200 installed on its top surface for holding and heating the oil. A gantry frame 300 is symmetrically fixed on both sides above the oil storage and heating assembly 200. A liftable fume extraction assembly 400 is installed in the middle of the gantry frame 300 to collect the fumes generated during frying, thereby improving the production environment. Inside the fume extraction assembly 400, from top to bottom, a pressing assembly 500 and a conveying assembly 600 are installed sequentially. The pressing assembly 500 applies stable pressure to the food, pressing and limiting the food on the conveying assembly to prevent it from floating or dislodging during frying. The conveying assembly 600 carries and transports the food to complete the frying and draining processes, with one end immersed in the oil in the oil storage and heating assembly 200. Meanwhile, a filter addition component 700 is also installed on the production line base plate 100 on one side of the oil storage heating component 200. The input and output ends of this component are connected to the inner cavity of the oil storage heating component 200 through pipelines. It can be understood that the oil for frying is filtered by the annular filter plate of the filter addition component to remove food debris from the oil. The filtered oil is returned to the oil storage heating component by the circulation pump to realize the recycling of oil and improve the stability of oil quality. At the same time, the new oil is preheated by the preheating addition component in the filter addition component 700, thus forming a circular working path that simultaneously has oil filtration, residue cleaning, and new oil preheating and quantitative addition, so as to effectively avoid drastic fluctuations in oil temperature while maintaining oil level.

[0013] In one embodiment of the present invention, the existing method of directly adding cold oil to the frying zone causes a sudden drop in oil temperature. Based on the above technical concept, the filter addition component 700 proposed in the present invention includes a filter frame 701, a filter cylinder 702, a return pipe 703, a drain pipe 704, a circulation pump 705, a liquid flow pipe 706, a filter disc positioning seat 707, an annular filter disc 708, an annular blocking cylinder 709, and a storage component located on one side of the filter frame 701.

[0014] In specific implementation, a filter cylinder 702 is fixed in the middle of the filter frame 701, and its lower part is connected to the main frying hopper 201 of the oil storage heating assembly 200 through a return pipe 703; a drain pipe 704 is provided at the bottom of the filter cylinder 702; a circulation pump 705 is fixedly installed on one side of the filter frame 701, its input end is connected to the bottom of the filter cylinder 702 through the drain pipe 704, and its output end is connected to the lower part of the inner cavity of the main frying hopper 201 through a liquid flow pipe 706, which is used to pump the filtered oil back to the main frying hopper 201, and a valve is installed in the return pipe 703.

[0015] Furthermore, a filter disc positioning seat 707 is fixed in the lower part of the inner cavity of the filter cylinder 702, and an annular filter disc 708 for removal and cleaning is placed on the top surface of the filter disc positioning seat 707. An annular baffle cylinder 709 is fixed in the middle of the top surface of the annular filter disc 708, and a preheating and adding component is installed inside it. At the same time, a storage component including an oil storage cylinder 720 is installed on the production line base plate 100 on one side of the filter frame 701. The storage component delivers new oil to the aforementioned preheating and adding component through pipelines. The principle is as follows: hot oil flowing out of the main fryer 201 enters the filter cylinder 702 through the return pipe 703, and after impurities are filtered by the annular filter disc 708, it is pumped back by the circulation pump 705 to form a purification cycle; at the same time, the new oil output from the storage component enters the preheating and adding component, and is preheated by the hot oil flowing through the filter cylinder 702. The preheated new oil is then controllably added to the circulating oil circuit, thereby avoiding drastic fluctuations in oil temperature when replenishing oil volume.

[0016] Furthermore, the preheating addition component in this embodiment includes a sealing top cover lifting cylinder 710, a sealing top cover 712, and a preheating inner liner 713. The sealing top cover lifting cylinder 710 is fixedly installed on the top surface of the filter frame 701, and its output end is fixedly connected to a lifting frame 711. The bottom surface of the lifting frame 711 is fixedly connected to the sealing top cover 712, which is used to drive the sealing top cover and the preheating inner liner to rise and fall for sealing or maintenance. The sealing top cover 712 covers the top surface of the filter cylinder 702. The preheating inner liner 713 is fixedly installed in the middle of the bottom surface of the sealing top cover 712. The preheating inner liner 713 is located in the middle of the annular baffle cylinder 709 inside the filter cylinder 702, and its bottom is provided with a leakage component.

[0017] Furthermore, the leakage assembly includes a plurality of leakage holes 714 equally spaced at the bottom of the preheating inner liner 713, and a flow regulating mechanism disposed inside the preheating inner liner 713 for adjusting the opening of the leakage holes 714.

[0018] Understandably, during operation, the sealing top cover lifting cylinder 710, via the lifting frame 711, drives the sealing top cover 712 downwards, sealing the top of the filter cylinder 702 to reduce heat loss. New oil supplied by the storage component enters the preheating inner tank 713 and is indirectly preheated by the circulating hot oil flowing through the filter cylinder 702. The preheated new oil drips evenly into the filter cylinder 702 through the drain hole 714 at the bottom of the preheating inner tank 713, mixes with the filtered hot oil, and is then sent back to the frying zone by the circulating pump 705, thus achieving constant-temperature oil replenishment. When cleaning is required, the sealing top cover lifting cylinder 710 lifts the entire preheating inner tank 713 and the sealing top cover 712, detaching them from the filter cylinder 702, facilitating cleaning or replacement of the preheating inner tank 713 and the annular filter disc 708.

[0019] Based on the above technical concept, in this implementation, in order to solve the problem of the inability to accurately control the amount of new oil added, resulting in accidental addition.

[0020] The present invention further proposes a flow regulation mechanism in the preheating addition component, including a rotary motor 715, a rotary shaft 716, a rotary disk 717, and regulating valve holes 718. The rotary motor 715 is fixedly mounted on the top surface of the sealed top cover 712, and its output end is connected to the rotary shaft 716, which extends into the preheating inner liner 713. The end of the rotary shaft 716 is fixedly connected to the rotary disk 717. The rotary disk 717 is in close contact with the inner bottom of the preheating inner liner 713, and regulating valve holes 718 are evenly spaced on its surface.

[0021] Understandably, by driving the rotating shaft 716 through the rotating motor 715, the rotating disk 717 rotates at the bottom of the preheating inner tank 713. At this time, by controlling the relative position between the regulating valve hole 718 on the rotating disk 717 and the drain hole 714 at the bottom of the preheating inner tank 713, the overlapping area of ​​the two can be precisely adjusted, thereby achieving precise control of the new oil addition flow rate. When the regulating valve hole 718 and the drain hole 714 are completely misaligned, the rotating disk 717 can completely close the oil circuit, thereby turning off the oil replenishment function and effectively preventing accidental addition.

[0022] Furthermore, in this embodiment, to ensure continuous oil supply for frying operations and reduce operational difficulty, the proposed storage components include an oil storage rack 719, an oil storage cylinder 720, a replenishment pump 721, and a new oil injection pipe 723. The oil storage rack 719 is installed on the production line base plate 100 on one side of the filter rack 701. Specifically, the oil storage rack 719 is fixed to the top surface of the production line base plate 100, with the oil storage cylinder 720 for storing new oil fixedly installed in its middle. A replenishment pump 721 is fixedly installed on one side of the oil storage rack 719, with its input end connected to the bottom surface of the oil storage cylinder 720 via a new oil suction pipe 722, and its output end connected upwards to the top surface of the sealing top cover 712 of the preheating and adding component via the new oil injection pipe 723. At this time, in order to solve the problem of stable supply and convenient replenishment of new oil during continuous operation of the production line, the oil storage tank 720 can be used as a new oil storage tank. With the power of the replenishment pump 721, the new oil is pumped in through the new oil suction pipe 722, and then stably delivered to the oil inlet at the top of the sealed top cover 712 through the new oil injection pipe 723, and finally injected into the preheating inner tank 713.

[0023] Taking the current production of French fries as an example, during continuous frying, starch granules and other debris that detach from the surface of the fries will settle to the bottom of the tank due to gravity. These accumulated debris will remain in the high-temperature oil for a long time, resulting in excessive caramelization or even carbonization. On the one hand, carbonized debris will accelerate the thermal oxidation and polymerization reaction of the oil, causing the oil to darken in color, increase viscosity, produce off-flavors such as rancidity, and reduce crispness, causing the oil quality to deteriorate rapidly, directly affecting the taste and color stability of the French fries. On the other hand, the deposits form a heat insulation layer on the surface of the heating tube or heating plate, similar to scale, which seriously affects the heating efficiency, leading to increased energy consumption and inaccurate oil temperature control. At the same time, uneven accumulation can also lead to local overheating, further aggravating oil cracking and forming a vicious cycle.

[0024] Based on this, in one embodiment of the present invention, to solve the problem that food debris easily accumulates at the bottom of traditional frying tanks, leading to oil deterioration and affecting heating efficiency, an oil storage and heating assembly 200 is proposed, comprising a main frying hopper 201, a sediment collection cylinder 202, and an automatic cleaning mechanism.

[0025] In specific implementation, the automatic cleaning mechanism includes a cleaning shaft 203, a bottom scraper 204, and an arc-shaped cleaning plate 205. The cleaning shaft 203 is rotatably mounted inside the sediment collection cylinder 202. The bottom scraper 204, which contacts the bottom surface of the sediment collection cylinder 202, is fixed to the lower part of the cleaning shaft 203. The upper part of the cleaning shaft 203 extends into the main frying hopper 201 and is fixedly connected to the arc-shaped cleaning plate 205. The bottom surface of the cleaning plate is in contact with the inner bottom surface of the main frying hopper 201, and an oil guide hole 206 is opened on its side. The main frying hopper 201, which is fixed to the top surface of the production line base plate 100, holds and heats the oil. The bottom center of the main frying hopper 201 is fixedly connected downward to the sediment collection cylinder 202. The bottom surface of the sediment collection cylinder 202 is connected to the return pipe 703 of the filter addition component 700 through a pipeline.

[0026] Thus, during the operation of this device, the hot oil flow pumped back from the filter addition component 700 through the liquid flow pipe 706 (whose outlet is set towards the arc-shaped cleaning plate) impacts the arc-shaped cleaning plate 205, driving the cleaning shaft 203 to rotate. This causes the arc-shaped cleaning plate 205 to scrape off the debris at the bottom of the main frying hopper 201 and push it into the sediment collection cylinder 202. At the same time, the rotating bottom scraper 204 scrapes off the debris at the bottom of the sediment collection cylinder 202 and discharges it through the return pipe 703. The oil guide hole 206 is designed to ensure the normal circulation of oil in the hopper, realize the automatic online cleaning of deposited debris, effectively delay the deterioration of oil and maintain heating efficiency.

[0027] In one embodiment of the present invention, in order to solve the problem that traditional fixed fume collection hoods cannot adapt to the height of oil fumes generated during the frying of different foods, resulting in low collection efficiency, the proposed fume exhaust assembly 400 includes a fume collection hood lifting cylinder 401, a fume collection hood body 402, and a fume exhaust pipe 403.

[0028] In specific implementation, there are two smoke hood lifting cylinders 401, which are symmetrically fixedly installed in the middle of the portal frame 300; the smoke hood body 402 is fixedly connected to the output end of the two smoke hood lifting cylinders 401 and can be raised and lowered accordingly; the top surface of the smoke hood body 402 is symmetrically fixedly connected to the exhaust pipe 403.

[0029] Thus, by controlling the extension and retraction of the fume hood lifting cylinder 401, the height of the fume hood 402 above the oil surface can be adjusted as a whole, thereby adjusting the fume hood 402 to the optimal collection position according to the oil fume generation of different frying processes; the collected oil fumes are led out through the exhaust pipe 403 at the top of the fume hood 402 and can be connected to an external exhaust system for centralized purification, significantly improving the oil fume collection efficiency, effectively preventing the spread of oil fumes in the workshop, and improving the production environment.

[0030] In one embodiment of the present invention, in order to solve the problem of uneven heating and one-sided frying caused by food floating during frying, and to adapt to the production needs of products of different thicknesses, The pressing assembly 500 proposed in this invention includes a pressing mesh height adjusting cylinder 501, a pressing mesh drive frame 502, a floating pressing mesh plate 509, and a chain drive assembly. In specific implementation, The screen height adjustment cylinder 501 is fixedly installed on the top surface of the inner cavity of the smoke collection hood 402, and its output end is fixedly connected downward to the screen driving frame 502, thereby realizing the overall height adjustment of the screen driving frame 502; a drive motor 503 is fixedly installed on one side of the screen driving frame 502, and its output end is connected to a chain transmission assembly through a worm gear mechanism.

[0031] Specifically, the chain drive assembly consists of a drive shaft 504, a main sprocket 506, a driven shaft 505, a driven sprocket 507, and a reciprocating chain 508 surrounding it. The drive shaft 504 and driven shaft 505 are rotatably connected to both ends of the inner cavity of the mesh pressing drive frame 502; the main sprocket 506 is fixed to both ends of the drive shaft 504, and the driven sprocket 507 is fixed to both ends of the driven shaft 505, the two being connected by the reciprocating chain 508. Furthermore, floating pressure plates 509 are rotatably connected between two sets of parallel reciprocating chains 508 at equal intervals; chain guide wheels 510 for supporting and guiding the chains are also rotatably connected to both sides of the inner wall of the pressure drive frame 502.

[0032] Understandably, the overall height of the pressing screen drive frame 502 can be adjusted by the pressing screen height adjustment cylinder 501 to accommodate different food thicknesses. The drive motor 503 drives the reciprocating chain 508 and the floating pressing screen plate 509 to operate synchronously through the chain drive assembly, thereby providing stable pressing of the food on the conveying component 600 below throughout the process, effectively preventing it from floating and ensuring even frying.

[0033] In one embodiment of the present invention, to solve the problems of the fixed height of the conveying mechanism in continuous frying production, which cannot be adapted to different products, and the potential for oil temperature fluctuations to affect quality, the proposed conveying assembly 600 includes a conveyor lifting cylinder 601, a conveying frame 603, and conveying components.

[0034] In practice, the conveyor lifting cylinder 601 is fixed to the top surface of the inner cavity of the fume hood 402, and its output end is fixedly connected downward to the conveyor frame 603, thereby realizing the overall height adjustment of the conveyor frame 603. The conveyor frame 603 is equipped with conveying components to flexibly adapt to the frying process requirements of foods of different thicknesses.

[0035] Furthermore, the conveying components include a conveying motor 605, a conveying main shaft 606, a conveying driven shaft 607, and a sprocket pressure roller 611. The conveying motor 605 is fixed to one side of the conveying frame 603, and its output end is connected to the conveying main shaft 606, which is rotatably connected to one end of the inner cavity of the conveying frame 603, via a worm gear mechanism. Conveying main sprockets 608 are fixed to both ends of the conveying main shaft 606. The conveying driven shaft 607 is rotatably connected to the other end of the inner cavity of the conveying frame 603, and conveying driven sprockets 609 are fixed to both ends of it. A conveying chain 610 wraps around the conveying main sprockets 608 and the conveying driven sprockets 609, thereby forming a chain drive.

[0036] Furthermore, a sprocket pressure roller 611 is rotatably connected to the inner wall of the conveyor frame 603 to make the conveyor chain 610 present a U-shaped orientation with high ends and low middle. A food support plate 612 is fixedly connected between the two sets of parallel conveyor chains 610, and food positioning grooves 613 for placing food are opened at equal intervals on its side. The grooves are provided with oil filter holes 604 to promote the return of residual oil in the oil draining section. In addition, auxiliary electric heating tubes 602 are fixed at equal intervals inside the conveyor frame 603, located below the conveying components, to provide auxiliary heating for the frying oil in the oil storage heating component, maintain stable oil temperature, and improve the consistency of food frying quality.

[0037] Based on the above technical concept, it can be understood that the immersion depth of the entire conveyor frame 603 can be adjusted by the conveyor lifting cylinder 601 to accommodate foods of different thicknesses; the conveyor motor 605 drives the food support plate 612 to move along a U-shaped path: the high end facilitates feeding and draining, while the low end ensures that the food is completely immersed in the oil for frying, thereby ensuring the continuity, uniformity, and high quality of the frying process. Specifically, the high-end discharge end of the conveyor chain allows the fried food to undergo a period of airborne, natural oil draining on the inclined food support plate 612 after it leaves the oil surface, causing excess oil to flow back into the oil pot through the oil filter holes 604 of the food positioning groove 613, reducing the oil content of the product, improving the taste, and saving oil; the middle and lower end of the conveyor chain ensures that the food support plate 612 and the food are completely immersed in the oil in the oil storage heating component 200, ensuring that the food is fully and evenly fried.

[0038] At this point, the high-end feed end of the conveyor chain is positioned above the oil surface, providing workers with a dry, safe, and convenient operating platform. This facilitates the accurate placement of food to be fried into the food positioning slot 613 and the receipt of finished products that have been drained of oil. This layout effectively separates the wet zone (frying) from the dry zone (loading and unloading), optimizing the operational process.

[0039] To facilitate understanding of the technical concept of this invention, the overall working principle of this invention is as follows: First, preparation work is carried out by filling the main frying hopper 201 and the oil storage tank 720 with oil to the designated level. The auxiliary heating element 602 in the conveyor frame 603 is activated to heat the frying oil, and the replenishment pump 721 pumps fresh oil from the oil storage tank 720 into the preheated inner tank 713. Once ready, the food to be fried is placed in the food positioning slot 613 of the food support plate 612. Then, the conveyor motor 605 is activated to drive the conveyor chain 610, moving the food. When the food enters the frying area, the drive motor 503 of the pressing component 500 is simultaneously activated, causing the floating pressure plate 509 to move synchronously with the food, stabilizing and pressing it to ensure even frying and prevent floating. After frying, the food is drained and output at the high end of the conveyor chain 610.

[0040] During production, continuous oil treatment and replenishment are carried out: the return pipe valve 703 is opened, allowing the hot oil in the main fryer 201 to flow into the filter cylinder 702. After being filtered by the annular filter disc 708 to remove debris, it is pumped back by the circulation pump 705. This circulating oil flow simultaneously drives the arc-shaped cleaning plate 205 to rotate, automatically cleaning the residue at the bottom of the main fryer 201 and the sediment collection cylinder 202. At the same time, the hot oil in the filter cylinder 702 indirectly preheats the new oil in the preheating inner tank 713. When a drop in oil level is detected, the rotary motor 715 drives the rotating disk 717 to rotate, so that the drain hole 714 at the bottom of the preheating inner tank 713 partially or completely overlaps with the regulating valve hole 718 on the rotating disk 717, accurately and as needed adding the preheated new oil into the filter oil circuit, and sending it back to the main fryer 201 via the circulation pump 705, achieving constant temperature oil replenishment.

[0041] When maintenance is required, the sealing top cover lifting cylinder 710 can be operated to lift the preheating inner liner 713 and the sealing top cover 712 as a whole, so that the annular filter disc 708 can be removed for cleaning. By controlling the smoke hood lifting cylinder 401, the screen pressing height adjusting cylinder 501 and the conveyor lifting cylinder 601, the smoke hood body 402 as a whole, the screen pressing drive frame 502 and the conveyor frame 603 can be lifted respectively, providing ample space for cleaning and maintenance of each component.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A food frying production line, characterized in that: include: Production line base plate (100), oil storage heating component (200) installed on the top surface of production line base plate (100), and filter addition component (700). The oil storage heating assembly (200) includes a main frying hopper (201) for holding heated oil; the filter addition assembly (700) includes a filter frame (701) fixedly connected to the top surface of the production line base plate (100), filter cylinders (702) respectively fixed on the filter frame (701), a circulation pump (705) and a preheating addition component; The filter cylinder (702) is connected to the main fryer (201) via a return pipe (703) to receive hot oil, and has a removable and cleanable annular filter disc (708) inside; the input end of the circulation pump (705) is connected to the bottom of the filter cylinder (702) via a drain pipe (704), and the output end is connected to the main fryer (201) via a flow pipe (706) to form an oil filtration circulation loop; The preheating and adding component includes a preheating inner liner (713) disposed inside the filter cylinder (702) and located in the middle region of the annular filter plate (708), and a storage component for conveying the stored new oil to the preheating inner liner (713); the preheating inner liner (713) is surrounded by circulating hot oil flowing through the annular filter plate (708) to indirectly preheat the new oil, and a leakage component is provided at its bottom so that the preheated new oil drips into the filter cylinder (702) and mixes with the filtered hot oil, and is finally pumped back to the main fryer (201) by the circulating pump (705) to achieve constant temperature oil replenishment; The oil storage heating assembly (200) also includes an automatic cleaning mechanism; wherein the automatic cleaning mechanism includes a cleaning shaft (203), a bottom scraper (204), and an arc-shaped cleaning plate (205). The cleaning shaft (203) is rotatably disposed inside the sediment collection cylinder (202). The bottom scraper (204) is fixed to the lower part of the surface of the cleaning shaft (203) and contacts the bottom surface of the inner cavity of the sediment collection cylinder (202). The upper part of the cleaning shaft (203) extends into the main frying hopper (201) and is fixedly connected to the arc-shaped cleaning plate (205). The bottom surface of the arc-shaped cleaning plate (205) is in contact with the inner bottom surface of the main frying hopper (201). The outlet of the liquid discharge pipe (706) is set towards the arc-shaped cleaning plate (205) so that the pump return oil flow impacts the arc-shaped cleaning plate (205) and drives the cleaning shaft (203) to rotate, so as to automatically scrape off and discharge the deposited food debris.

2. The food frying production line according to claim 1, characterized in that: The preheating addition component also includes a sealing top cover lifting cylinder (710) and a sealing top cover (712); wherein, the sealing top cover (712) covers the top surface of the filter cylinder (702), and the preheating inner liner (713) is fixed to the bottom surface of the sealing top cover (712); the sealing top cover lifting cylinder (710) is installed on the top surface of the filter frame (701), and its output end is connected to the sealing top cover (712) through a fixedly connected lifting frame (711), which is used to drive the sealing top cover (712) and the preheating inner liner (713) to rise and fall, so as to achieve sealing or maintenance.

3. The food frying production line according to claim 1, characterized in that: It also includes a gantry frame (300) and a smoke exhaust assembly (400); the gantry frame (300) is symmetrically fixed on the production line base plate (100) and spans above the oil storage heating assembly (200); the smoke exhaust assembly (400) includes a smoke collection hood lifting cylinder (401) installed in the middle of the gantry frame (300) and a smoke collection hood body (402) connected to its output end.

4. The food frying production line according to claim 3, characterized in that: The smoke collection hood (402) is equipped with a pressing component (500) inside its cavity. The pressing assembly (500) includes a pressing screen height adjustment cylinder (501), a pressing screen drive frame (502), and a floating pressing screen plate (509). The pressing screen height adjustment cylinder (501) is fixedly installed on the top surface of the inner cavity of the smoke collection hood (402), and its output end is fixedly connected downward to the pressing screen drive frame (502), thereby realizing the overall height adjustment of the pressing screen drive frame (502). A drive motor (503) is fixedly installed on one side of the pressing screen drive frame (502), and its output end is connected to a chain transmission assembly through a worm gear mechanism. The chain drive assembly includes a drive shaft (504), a main sprocket (506), a driven shaft (505), a driven sprocket (507), and a reciprocating chain (508) surrounding it. The drive shaft (504) and the driven shaft (505) are rotatably connected to both ends of the inner cavity of the mesh pressing drive frame (502). The main sprocket (506) is fixed to both ends of the drive shaft (504), and the driven sprocket (507) is fixed to both ends of the driven shaft (505). The two are connected by the reciprocating chain (508). The floating pressure plate (509) is rotatably connected between the reciprocating chains (508) at equal intervals, and is used to synchronously press the food.

5. A food frying production line according to claim 1, characterized in that: It also includes a conveying assembly (600); the conveying assembly (600) includes a conveyor lifting cylinder (601), a conveyor frame (603), and conveying components; The conveyor lifting cylinder (601) is fixed to the top surface of the inner cavity of the smoke collection hood (402), and its output end is fixedly connected downward to the conveyor frame (603), thereby realizing the overall height adjustment of the conveyor frame (603); the conveyor frame (603) is equipped with conveying components to flexibly adapt to the frying process requirements of foods of different thicknesses. The conveying components include a conveying motor (605), a conveying main shaft (606), a conveying slave shaft (607), and a sprocket pressure roller (611). The conveying motor (605) is fixed to one side of the conveying frame (603), and its output end is connected to the conveying main shaft (606) rotatably connected to one end of the inner cavity of the conveying frame (603) through a worm gear mechanism. The two ends of the conveying main shaft (606) are fixed with conveying main sprockets (608). The other end of the inner cavity of the conveying frame (603) is rotatably connected with the conveying slave shaft (607), and the two ends of the conveying slave sprocket (609) are fixed with it. The conveying chain (610) is wrapped around the conveying main sprocket (608) and the conveying slave sprocket (609).

6. A food frying production line according to claim 5, characterized in that: The inner wall of the conveyor frame (603) is also rotatably connected to a sprocket pressure roller (611), which is used to make the conveyor chain (610) present a U-shaped direction with high ends and low middle. A food carrier plate (612) is fixedly connected between the conveyor chains (610), and food positioning grooves (613) for placing food are opened at equal intervals on its side. Oil filter holes (604) are provided in the grooves to promote the return of residual oil in the oil draining section.

7. A food frying production line according to claim 1, characterized in that: The leakage assembly includes a plurality of leakage holes (714) opened at the bottom of the preheating inner liner (713), and a flow regulating mechanism disposed inside the preheating inner liner (713) for adjusting the opening of the leakage holes (714). The flow regulation mechanism includes a rotary motor (715), a rotary shaft (716), a rotary disk (717), and a regulating valve hole (718). The rotary motor (715) is fixedly installed on the top surface of the sealed top cover (712), and its output end is connected to a rotary shaft (716) that extends into the preheating inner tank (713). The end of the rotary shaft (716) is fixedly connected to a rotary disk (717), which is close to the bottom inner side of the preheating inner tank (713). Regulating valve holes (718) are evenly spaced on its surface. The rotation of the rotary disk (717) controls the overlapping area of ​​the regulating valve hole (718) and the leakage hole (714) to precisely regulate the flow rate of new oil addition.

8. A food frying production line according to claim 6, characterized in that: The conveyor frame (603) has auxiliary heating tubes (602) fixed at equal intervals below the conveying component to assist in heating the frying oil in the oil storage heating assembly.

9. A food frying production line according to claim 1, characterized in that: The storage component includes an oil reservoir (720) and a supply pump (721); wherein the oil reservoir (720) is installed on the production line base plate (100); the input end of the supply pump (721) is connected to the oil reservoir (720) through a new oil suction pipe (722), and the output end is connected to the top surface of the sealing top cover (712) through a new oil injection pipe (723).

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