A circulating air filtering device for an oven for food production
By installing a circulating air filtration device in the drying oven, and utilizing a combination of U-shaped grooves, S-shaped flow paths, condenser pipes, and filter screens, the problem of hot air carrying food debris is solved, achieving efficient drying and clean circulating air, thus improving the quality of food drying.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANYANG CHENXIANG POTATO IND CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-07
AI Technical Summary
Existing ovens lack circulating air filtration components, causing hot air to carry food debris, which affects the quality of food drying.
A circulating air filtration device was designed, comprising a box, control box, door, shell, air supply component, and filter component. The device ensures that hot air is in full contact with food through a U-shaped groove and an S-shaped flow path, and a condenser and filter screen are installed in the flow groove to remove food debris and water vapor.
It achieves high cleanliness of circulating air, ensures effective food drying, extends the contact time between hot air and food, improves drying quality, and facilitates the cleaning and maintenance of the filter.
Smart Images
Figure CN224470617U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food production technology, specifically to a circulating air filtration device for a drying oven used in food production. Background Technology
[0002] Currently, ovens can place food on baking trays and use heating and hot air circulation to achieve the required heat treatment effect in a short time. High-temperature baking can kill bacteria and viruses in the food, ensuring food hygiene and safety. The high temperature in the oven can easily kill some aerobic bacteria in the food, preventing food spoilage.
[0003] Chinese patent application CN202421336434.4 discloses an energy-saving oven for food production, including an oven body and a hot air circulation device. A door is hinged to the front surface of the oven body. A through groove is formed on the side of the oven body opposite to the hot air circulation device. A baking tray structure is slidably embedded inside the through groove. From left to right, the through groove includes a sealing groove A, a sliding groove, and a sealing groove B. The baking tray structure includes a sealing plate A from left to right. This invention's technical solution ensures that when the baking tray structure is pulled out to remove the dried food, the sealing plate A and sealing groove A tightly engage, minimizing heat loss from the oven and saving energy. Furthermore, because hot air cannot escape from the through groove when the baking tray structure is pulled out, it prevents heat from spreading into the environment and causing excessively high ambient temperatures, thus reducing the probability of heatstroke among workers.
[0004] However, this setup does not have a corresponding circulating air filter component. When the circulating air passes over the baking tray and the food, the hot air will be mixed with food debris. In the next cycle, the hot circulating air carrying food debris will affect the drying quality of the food. Therefore, a corresponding filter component is needed. Utility Model Content
[0005] To address the problem that hot air carrying food debris gets mixed in with the circulating air as it passes over the baking tray and the food, the purpose of this invention is to provide a circulating air filtration device for a food production oven.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a circulating air filtration device for a food production oven, comprising a box body, a control box and doors, two doors being rotatably connected to the outer ports of the box body, the control box being installed on the outer wall of the box body, a shell being installed inside the box body, and several grooved plates being fixedly connected to the inner walls on both sides of the shell body, with a placement tray being slidably connected between two grooved plates;
[0007] The outer wall of the housing is connected to a pipe, a first filter screen is threaded to the port of the pipe, an air supply assembly is installed inside the pipe, and a heating wire is provided between the pipe and the first channel.
[0008] The outer wall of the pipe is connected to a first channel, which connects to the top of the shell. One end of the first channel is connected to a second channel, which forms a circulation channel with the interior of the shell. A filter assembly is installed on the circulation channel to filter the circulating air.
[0009] Preferably, U-shaped grooves are provided on the inner walls of both sides of the housing, and hot air flows to the top of the housing through the first channel, and hot air flows from one end of the placement tray to the other end of the placement tray;
[0010] Hot air flows in an S-shape inside the housing through several U-shaped channels and passes over each placement tray.
[0011] Preferably, a flow channel is provided at the bottom of the housing, and a heating tube and a condenser tube are installed inside the flow channel. The filter assembly is located between the heating tube and the condenser tube. The flow channel is connected between the U-shaped channel and the second channel. A rotating plate is rotatably connected to the inner wall of the U-shaped channel. The rotating plate is close to the second channel and is used to control the hot air to circulate from the second channel into the interior of the U-shaped channel.
[0012] Preferably, the outer wall of the housing is provided with a number of heat dissipation holes to prevent the housing from overheating.
[0013] Preferably, the air supply assembly includes a motor and fan blades, a support frame is fixedly connected to the inner wall of the duct, the motor is mounted on the support frame, and the fan blades are mounted on the output shaft of the motor.
[0014] Preferably, the filter assembly includes a pull rod, a mounting base, and a second filter screen. The pull rod is fixedly connected to the mounting base, and the pull rod and the mounting base are slidably connected to the bottom of the housing. Several second filter screens are connected by a fixed rod and slidably connected to the inner wall of the mounting base. A water storage tank is provided at the bottom of the mounting base.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] This invention utilizes a second filter screen. After heat exchange, the humid, hot air enters the flow channel at the bottom of the housing through a U-shaped groove. The condenser tube in the flow channel cools the humid, hot air, causing the water vapor in the air to condense into liquid water, which drips into the water storage tank of the mounting base below the filter assembly and is collected. The dehumidified air then flows through the second filter screen in the filter assembly, filtering out food debris from the air and ensuring the cleanliness of the circulating air.
[0017] This invention utilizes a second filter to deliver hot air through the first channel to the top of the housing, where it then flows along the interior of the housing. U-shaped grooves on the inner walls of both sides of the housing guide the hot air in an "S-shaped" path, ensuring that the hot air passes over each tray in sequence to dry the food on the trays. The S-shaped flow path prolongs the contact time between the hot air and the food, allowing for sufficient heat exchange and efficient removal of moisture from the food, thus achieving a drying effect.
[0018] This utility model is slidably connected to the bottom of the box by a pull rod and a mounting base. Several second filter screens are connected by a fixed rod and slidably connected to the inner wall of the mounting base, which is used to disassemble and clean the second filter screens, making it convenient to maintain and clean the second filter screens. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.
[0022] Figure 3 This is a schematic diagram of the U-shaped groove structure of this utility model.
[0023] Figure 4 This is a schematic diagram of the internal structure of the pipeline of this utility model.
[0024] Figure 5 This is a schematic diagram of the heating tube and condenser tube of this utility model.
[0025] Figure 6 This utility model Figure 3 A schematic diagram of the structure at point A in the middle.
[0026] Figure 7 This utility model Figure 3 A schematic diagram of the structure at point B.
[0027] Figure 8 This is a schematic diagram of the filter assembly of this utility model.
[0028] In the diagram: 1. Box body; 101. Heat dissipation hole; 102. Slot plate; 103. U-shaped slot; 104. Flow channel; 2. Control box; 3. Door; 4. Placement tray; 5. Housing; 501. First channel; 502. Second channel; 6. First filter screen; 7. Motor; 8. Fan blade; 9. Heating wire; 10. Heating tube; 11. Condenser tube; 12. Pull rod; 13. Rotating plate; 14. Mounting base; 1401. Water storage tank; 15. Second filter screen. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Example
[0031] like Figure 1 - Figure 8 As shown, this utility model provides a circulating air filtration device for a food production oven, including a box body 1, a control box 2 and a door body 3. Two doors 3 are rotatably connected to the outer ports of the box body 1. The control box 2 is installed on the outer wall of the box body 1. A shell 5 is installed inside the box body 1. Several groove plates 102 are fixedly connected to the inner walls on both sides of the shell 5. A placement tray 4 is slidably connected between two groove plates 102.
[0032] The outer wall of the housing 5 is connected to a pipe, and a first filter screen 6 is threadedly connected to the end of the pipe. An air supply component is installed inside the pipe, and a heating wire 9 is provided between the pipe and the first channel 501.
[0033] The outer wall of the pipe is connected to a first channel 501, which connects to the top of the housing 5. One end of the first channel 501 is connected to a second channel 502, which forms a circulation channel with the interior of the housing 5. A filter assembly is installed on the circulation channel to filter the circulating air.
[0034] U-shaped grooves 103 are provided on the inner walls of both sides of the housing 5. Hot air flows to the top of the housing 5 through the first channel 501 and flows from one end of the placement plate 4 to the other end of the placement plate 4.
[0035] Hot air flows in an S-shape inside the housing 5 through several U-shaped grooves 103 and passes above each placement tray 4. The hot air is delivered to the top of the housing 5 through the first channel 501 and then flows along the inside of the housing 5. The U-shaped grooves 103 on both sides of the inner wall of the housing 5 guide the hot air to flow in an "S-shaped" path, ensuring that the hot air passes above each placement tray 4 in sequence to dry the food on the placement tray 4.
[0036] The bottom of the housing 5 is provided with a flow channel 104. The heating tube 10 and the condenser tube 11 are installed inside the flow channel 104. The filter assembly is located between the heating tube 10 and the condenser tube 11. The flow channel 104 is connected between the U-shaped channel 103 and the second channel 502. A rotating plate 13 is rotatably connected to the inner wall of the U-shaped channel 103. The rotating plate 13 is close to the second channel 502. The rotating plate 13 is used to control the hot air to circulate from the second channel 502 into the interior of the U-shaped channel 103. The clean hot air after heating and filtration flows back through the second channel 502 and is guided by the rotating plate 13 on the inner wall of the U-shaped channel 103. The rotating plate 13 is set to prevent the air from flowing back into the interior of the second channel 502. Then the hot air re-enters the U-shaped channel 103 to participate in the circulation, forming a closed loop.
[0037] Several heat dissipation holes 101 are provided on the outer wall of the housing 1 to prevent the housing 5 from overheating.
[0038] The air supply assembly includes a motor 7 and a fan blade 8. A support frame is fixedly connected to the inner wall of the duct. The motor 7 is mounted on the support frame, and the fan blade 8 is mounted on the output shaft of the motor 7. The output shaft of the motor 7 drives the fan blade 8 to rotate, drawing air from the outside into the duct that connects to the housing 5.
[0039] The filter assembly includes a pull rod 12, a mounting base 14, and a second filter screen 15. The pull rod 12 is fixedly connected to the mounting base 14, and the pull rod 12 and the mounting base 14 are slidably connected to the bottom of the housing 1. Several second filter screens 15 are connected by a fixed rod and slidably connected to the inner wall of the mounting base 14 for disassembly and cleaning. A water storage tank 1401 is provided at the bottom of the mounting base 14. Water vapor in the air condenses into liquid water and drips into the water storage tank 1401 of the mounting base 14 below the filter assembly for collection. The dehumidified air flows through the second filter screens 15 in the filter assembly to filter food debris in the air and ensure the cleanliness of the circulating air.
[0040] Working principle: The motor 7 and fan blades 8 in the air supply assembly provide power for the circulating air. The output shaft of the motor 7 drives the fan blades 8 to rotate, drawing air from the outside into the pipe connected to the housing 5. The air first passes through the first filter screen 6 at the pipe port to filter impurities and dust in the air, preventing pollutants from entering and causing pollution. Then it is heated by the heating wire 9 between the pipe and the first channel 501 to form hot air.
[0041] Hot air is delivered to the top of the housing 5 through the first channel 501, and then flows along the inside of the housing 5. The U-shaped grooves 103 on both sides of the inner wall of the housing 5 guide the hot air to flow in an "S-shaped" path, ensuring that the hot air passes over each placement tray 4 in sequence to dry the food on the placement tray 4.
[0042] The S-shaped flow path prolongs the contact time between hot air and food, allowing for sufficient heat exchange and efficient removal of moisture from the food, thus achieving a drying effect.
[0043] The humid hot air that has completed heat exchange enters the flow channel 104 at the bottom of the housing 5 through the U-shaped channel 103. The condenser tube 11 in the flow channel 104 cools the humid hot air, causing the water vapor in the air to condense into liquid water, which drips into the water storage tank 1401 of the mounting base 14 below the filter assembly and is collected. The dehumidified air flows through the second filter screen 15 in the filter assembly to filter food debris in the air and ensure the cleanliness of the circulating air.
[0044] The filtered dry air is reheated by the heating tube 10 in the flow channel 104 to restore it to the required temperature, ensuring that the circulating air has a continuous drying capacity.
[0045] After being heated and filtered, the clean hot air flows back through the second channel 502 and is guided by the rotating plate 13 on the inner wall of the U-shaped groove 103. The rotating plate 13 is designed to prevent air from flowing back into the second channel 502. Then the hot air re-enters the U-shaped groove 103 to participate in the circulation, forming a closed loop.
[0046] The heat dissipation holes 101 on the outer wall of the housing 1 can dissipate excess heat in time to prevent the temperature inside the housing 5 from getting too high. Together with the control box 2, the operating parameters of the motor 7, heating components and condenser 11 are adjusted to ensure the stable and efficient operation of the entire system.
[0047] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0048] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A circulating air filtration device for a food production oven, comprising a housing (1), a control box (2), and doors (3), wherein two doors (3) are rotatably connected to the outer ports of the housing (1), and the control box (2) is mounted on the outer wall of the housing (1), characterized in that: The box (1) has a shell (5) installed inside. Several slotted plates (102) are fixedly connected to the inner walls on both sides of the shell (5). A placement plate (4) is slidably connected between two slotted plates (102). The outer wall of the housing (5) is connected to a pipe, and a first filter screen (6) is threaded at the port of the pipe. An air supply assembly is installed inside the pipe, and a heating wire (9) is provided between the pipe and the first channel (501). The outer wall of the pipe is connected to a first channel (501), which is connected to the top of the housing (5). One end of the first channel (501) is connected to a second channel (502). The second channel (502) and the interior of the housing (5) form a circulation channel. A filter assembly is installed on the circulation channel for filtering the circulating air.
2. The circulating air filtration device for a food production oven as described in claim 1, characterized in that, U-shaped grooves (103) are provided on the inner walls of both sides of the housing (5). Hot air flows to the top of the housing (5) through the first channel (501) and flows from one end of the placement plate (4) to the other end of the placement plate (4). Hot air flows in an S-shape inside the housing (5) through several U-shaped grooves (103) and passes over each placement plate (4).
3. The circulating air filtration device for a food production oven as described in claim 2, characterized in that, The bottom of the housing (5) is provided with a flow channel (104), and a heating tube (10) and a condenser tube (11) are installed inside the flow channel (104). The filter assembly is located between the heating tube (10) and the condenser tube (11). The flow channel (104) is connected between the U-shaped channel (103) and the second channel (502). A rotating plate (13) is rotatably connected to the inner wall of the U-shaped channel (103). The rotating plate (13) is close to the second channel (502), and the rotating plate (13) is used to control the hot air to circulate from the second channel (502) into the interior of the U-shaped channel (103).
4. The circulating air filtration device for a food production oven as described in claim 1, characterized in that, The outer wall of the housing (1) is provided with several heat dissipation holes (101) to prevent the housing (5) from overheating.
5. The circulating air filtration device for a food production oven as described in claim 1, characterized in that, The air supply assembly includes a motor (7) and a fan blade (8). A support frame is fixedly connected to the inner wall of the pipe. The motor (7) is mounted on the support frame, and the fan blade (8) is mounted on the output shaft of the motor (7).
6. The circulating air filtration device for a food production oven as described in claim 1, characterized in that, The filter assembly includes a pull rod (12), a mounting base (14), and a second filter screen (15). The pull rod (12) is fixedly connected to the mounting base (14), and the pull rod (12) and the mounting base (14) are slidably connected to the bottom of the housing (1). Several second filter screens (15) are connected by a fixed rod and slidably connected to the inner wall of the mounting base (14). A water storage tank (1401) is provided at the bottom of the mounting base (14).