Low-temperature drying synergistic sterilization treatment device and process

Abstract

The invention discloses a low-temperature drying synergistic sterilization treatment device and process, and belongs to the technical field of dried fruit processing.The low-temperature drying synergistic sterilization treatment device comprises a drying box body, a box door and a supporting plate arranged in the drying box body, a material frame is placed on the supporting plate and comprises a rectangular frame plate, and vertical grooves are evenly formed in the two side walls of the rectangular frame plate; supporting rods are arranged in the vertical grooves between the two sides of the rectangular frame plate in a penetrating mode, and the supporting rods vertically slide in the vertical grooves. The mounting plates are arranged at the top and the bottom of the supporting plate correspondingly, the ultraviolet germicidal lamps are oppositely arranged on the mounting plates, and the mounting plates are fixedly connected with the vertical plates, so that in the process that a material frame is put into the drying box body to be dried, a reciprocating mechanism is used for controlling the ultraviolet germicidal lamps to reciprocate; the surface of the material frame can be irradiated from the upper direction and the lower direction at the same time, sterilization is conducted while drying is conducted, a pre-sterilization station does not need to be additionally arranged, the production process is shortened, and meanwhile timeliness of the dried fruit sterilization link is guaranteed.

Description

Technical Field

[0001] This invention relates to a sterilization treatment device, and more particularly to a low-temperature drying synergistic sterilization treatment device. This invention also relates to a sterilization treatment process, and more particularly to a low-temperature drying synergistic sterilization treatment process, belonging to the field of dried fruit processing technology. Background Technology

[0002] In the dried fruit processing industry, low-temperature drying has become a core processing technology because it can preserve the nutritional components, natural flavor, and appearance of the materials to the greatest extent. However, existing low-temperature dryers generally only focus on moisture removal and do not integrate a co-sterilization module, making dried fruits susceptible to contamination by bacteria, mold, and other microorganisms before and after drying, directly affecting the product's shelf life and food safety. To improve this situation, some production scenarios adopt a pre-sterilization solution before feeding, which involves moving the material basket carrying the dried fruits to an ultraviolet irradiation area to achieve pre-sterilization of the materials using ultraviolet light.

[0003] However, this process has significant technical flaws:

[0004] During the UV pre-sterilization stage and subsequent low-temperature drying process, the bottom of the dried fruit remains in contact with the mesh surface of the drying frame. On the one hand, this blocks the path of UV irradiation, preventing the localized areas of the dried fruit in contact with the frame from receiving an effective UV dose, creating dead zones for microbial residue and resulting in incomplete sterilization, failing to meet food hygiene and safety standards. On the other hand, the mesh frame physically obstructs the bottom of the dried fruit, hindering heat transfer and air circulation in that area. This not only prolongs the overall drying cycle but also causes significant variations in moisture content across different areas of the dried fruit, leading to localized under-drying or over-drying, severely impacting product quality consistency.

[0005] To address these issues, a low-temperature drying and synergistic sterilization device and process were designed. Summary of the Invention

[0006] The main objective of this invention is to provide a low-temperature drying and synergistic sterilization device and process. By installing mounting plates at the top and bottom of a tray, and arranging ultraviolet germicidal lamps on these plates, with the mounting plates fixedly connected to a vertical plate, the ultraviolet germicidal lamps are controlled to reciprocate during the drying process inside the drying chamber via a reciprocating mechanism. This allows for simultaneous irradiation of the tray surface from both above and below, sterilizing while drying. This eliminates the need for an additional pre-sterilization station, shortening the production process and ensuring the timeliness of the fruit sterilization step. The novel tray structure, composed of a rectangular frame, vertical groove, support rod, return spring, and strip groove, works in conjunction with columnar pressure blocks on the side of the vertical plate. When the reciprocating mechanism moves the vertical plate, the columnar pressure blocks slide along the strip groove and periodically press down on the support rod, achieving dynamic separation of the dried fruit from the support rod. This completely eliminates the problem of bottom obstruction caused by traditional trays. The system eliminates UV irradiation blind spots and addresses the issues of localized heat buildup and airflow obstruction caused by traditional material frame support structures. It ensures the entire surface of the dried fruit is covered by UV rays, effectively reducing the risk of microbial residue and guaranteeing the safety of the dried fruit for consumption. Simultaneously, it prevents moisture retention at the bottom of the dried fruit due to prolonged contact with the support structure, shortening the overall drying cycle and significantly improving drying efficiency. A cover plate at the bottom of the drying chamber effectively prevents fruit residue generated during processing from entering the chute, avoiding accumulation that could cause mechanical jamming or wear. This ensures stable operation of core components such as the reciprocating mechanism and extends the equipment's lifespan. Furthermore, when the mounting plate moves, it works in conjunction with a scraper and compression spring. The scraper, under the action of the compression spring, slides tightly against the cover plate surface, automatically pushing any fruit residue falling from the cover plate into the fruit residue collection trough. This simplifies the fruit residue cleaning process, reduces operational labor intensity, and enhances the equipment's practicality.

[0007] The objective of this invention can be achieved by adopting the following technical solution:

[0008] A low-temperature drying and sterilization treatment device includes a drying oven body, an oven door, and a tray disposed inside the drying oven body;

[0009] A material frame is placed on the pallet. The material frame includes a rectangular frame plate. Vertical grooves are evenly opened on both sides of the rectangular frame plate. Support rods are inserted into the vertical grooves between the two sides of the rectangular frame plate. The support rods slide vertically inside the vertical grooves. Return springs are provided between the two ends of the support rods and the bottom of the vertical grooves. Strip grooves that communicate with the top of the vertical grooves are opened on the sides of the rectangular frame plate. The ends of the support rods extend to the bottom of the inner side of the strip grooves.

[0010] The drying oven body has vertical plates that slide along the length of the tray on both sides inside. A columnar pressing block is provided on the side of the vertical plate near the material frame. The columnar pressing block is adapted to the strip groove.

[0011] The vertical plate has openings along its length that mate with it, and the vertical plate passes vertically through the openings.

[0012] The top and bottom of the tray are respectively equipped with mounting plates, and ultraviolet germicidal lamps are evenly distributed on the opposite sides of the two sets of mounting plates. The ends of the mounting plates are fixedly connected to the vertical plate.

[0013] The bottom of the drying oven body is equipped with a reciprocating mechanism to drive the vertical plate to move back and forth along the length of the tray.

[0014] Preferably, the surface of the tray is provided with stepped grooves, and the rectangular frame plate slides inside the stepped grooves and fits against the outside of the stepped grooves.

[0015] Preferably, the mounting plate has a light-shielding strip along its length on the side closest to the rectangular frame plate, and the light-shielding strip is in contact with the surface of the rectangular frame plate.

[0016] Preferably, both ends of the support rod are provided with annular grooves, and a positioning block is slidably arranged inside the annular groove. The top of the positioning block is fixedly connected to the inner top of the vertical groove.

[0017] Preferably, the reciprocating mechanism includes a chute located at the bottom of the drying chamber body, a motor at the end of the chute, a reciprocating lead screw connected to the output end of the motor, a slider that cooperates with the reciprocating lead screw slidably connected in the chute, a horizontal plate connected to the top of the slider, and the horizontal plate and the bottom of the vertical plate being fixedly connected.

[0018] Preferably, the top of the chute is covered with a cover plate, and both ends of the top of the cover plate are provided with fruit pulp collection troughs. A cleaning component is provided between the two sets of vertical plates to push the fallen fruit pulp into the fruit pulp collection troughs.

[0019] Preferably, the cleaning component includes a guide groove at the bottom of the vertical plate, a scraper is provided between the guide grooves at the bottom of the two sets of vertical plates, and the scraper slides vertically inside the guide groove and fits against the top of the cover plate, and a compression spring is connected between the top of the scraper and the inner wall of the guide groove.

[0020] Preferably, the wavelength range of the ultraviolet germicidal lamp is 200-280nm, and the ultraviolet germicidal lamp is equipped with a transparent protective cover on the outside.

[0021] Preferably, both the support rod and the cylindrical pressure block are cylindrical in shape, and both the support rod and the cylindrical pressure block are coated with a wear-resistant coating on their outer sides.

[0022] This invention also provides a low-temperature drying and synergistic sterilization process, comprising the following steps:

[0023] Step 1: Open the box door and spread the dried fruit to be processed evenly on the support rod of the material frame, ensuring that the dried fruit does not overlap and covers the surface of the support rod;

[0024] Step 2: Push the material frame along the stepped groove of the tray to the preset position inside the drying oven body, so that the material frame fits tightly against the outside of the stepped groove, and close the oven door;

[0025] Step 3: Turn on the ultraviolet sterilization lamp and simultaneously start the low-temperature drying function of the drying oven body. Turn on the preset drying parameters, and then start the motor of the reciprocating mechanism. The motor drives the reciprocating screw to rotate, which drives the slider, vertical plate and ultraviolet sterilization lamp to move back and forth along the length of the tray. The cylindrical pressure block on the vertical plate is embedded in the strip groove and periodically presses down on the support rod, so that the support rod moves down along the vertical groove and compresses the return spring. The dried fruit is completely separated from the support rod, and the ultraviolet sterilization lamp continuously irradiates the dried fruit from the upper and lower sides of the material frame to sterilize it in three dimensions.

[0026] Step 4: During the drying process, the scraper of the cleaning component always adheres to the surface of the cover plate under the elastic force of the compression spring. As the vertical plate moves back and forth, it pushes the fruit pulp falling off the cover plate into the fruit pulp collection troughs at both ends.

[0027] Step 5: After the drying cycle is completed, turn off the drying function, reciprocating mechanism and ultraviolet sterilization lamp of the drying chamber in sequence. Let it stand until the internal temperature of the equipment drops to room temperature, then open the chamber door and take out the material frame to complete the low-temperature drying and sterilization treatment of the dried fruit.

[0028] The beneficial effects of this invention are as follows:

[0029] This invention provides a low-temperature drying and synergistic sterilization treatment device and process. By installing mounting plates at the top and bottom of a tray, and arranging ultraviolet germicidal lamps on these plates, with the mounting plates fixedly connected to vertical plates, the ultraviolet germicidal lamps are controlled by a reciprocating mechanism to irradiate the surface of the tray from both above and below during the drying process. This achieves sterilization simultaneously with drying, eliminating the need for an additional pre-sterilization station, shortening the production process, and ensuring the timeliness of the fruit sterilization step. Furthermore, the device utilizes a rectangular frame, vertical grooves, support rods, return springs, and strip groove assembly. The newly constructed material frame structure, in conjunction with the columnar pressure blocks on the side of the vertical plate, allows the columnar pressure blocks to slide along the strip groove and periodically press down on the support rods when the reciprocating mechanism controls the movement of the vertical plate. This achieves dynamic separation between the dried fruit and the support rods, completely eliminating the blind spots caused by the bottom shading of the traditional material frame and the problems of local heat accumulation and airflow blockage caused by the traditional material frame support structure. This ensures that the entire surface of the dried fruit is covered by ultraviolet rays, effectively reducing the risk of microbial residue and ensuring the safety of the dried fruit for consumption. At the same time, it avoids moisture retention at the bottom of the dried fruit due to long-term contact with the support structure, shortens the overall drying cycle, and significantly improves drying efficiency.

[0030] A cover plate is installed at the bottom of the drying oven to effectively prevent fruit residue generated during the fruit drying process from entering the chute. This avoids the accumulation of fruit residue that could cause the mechanism to jam or wear, ensuring the stable operation of core components such as the reciprocating mechanism and extending the service life of the equipment. In addition, when the mounting plate moves, it works in conjunction with a scraper and a compression spring. The scraper slides tightly against the surface of the cover plate under the action of the compression spring, which can automatically push the fruit residue that falls off the cover plate into the fruit residue collection trough. This simplifies the fruit residue cleaning process, reduces the labor intensity of operation, and improves the practicality of equipment operation. Attached Figure Description

[0031] Figure 1 This is a side cross-sectional view of the drying state in a preferred embodiment of the low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0032] Figure 2 This is a side sectional view of the initial state of a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0033] Figure 3 This is a front view of a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0034] Figure 4 This is a partial side sectional view of a rectangular frame plate in a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0035] Figure 5 This is a front sectional view of a rectangular frame plate in a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0036] Figure 6 This is a shape diagram of the support rod in a preferred embodiment of the low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0037] Figure 7 This is a diagram showing the shape of a pallet in a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention.

[0038] Figure 8 This is a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention. Figure 2 Enlarged view of point A in the middle;

[0039] Figure 9 This is a linkage structure diagram of a preferred embodiment of the low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0040] Figure 10 This is a side sectional view of the cover plate of a preferred embodiment of the low-temperature drying and synergistic sterilization treatment device and process of the present invention;

[0041] Figure 11This is a partial structural diagram of the bottom end of the vertical plate in a preferred embodiment of a low-temperature drying and synergistic sterilization treatment device and process of the present invention.

[0042] In the picture: 1. Drying oven body; 2. Oven door;

[0043] 3. Pallet; 301. Stepped groove;

[0044] 4. Mounting plate; 401 light-shielding strip;

[0045] 5. Ultraviolet germicidal lamp; 6. Rectangular frame; 7. Vertical groove;

[0046] 8. Support rod; 801. Annular groove; 802. Positioning block;

[0047] 9. Return spring; 10. Strip groove; 11. Vertical plate; 12. Through opening; 13. Columnar pressure block;

[0048] 14. Reciprocating mechanism; 1401. Slide groove; 1402. Slider; 1403. Horizontal plate; 1404. Motor; 1405. Reciprocating lead screw; 1406. Cover plate; 1407. Fruit pulp collection trough; 1408. Guide groove; 1409. Scraper; 1410. Compression spring. Detailed Implementation

[0049] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0050] like Figures 1-11 As shown, this embodiment provides a low-temperature drying and sterilization treatment device, including a drying oven body 1, an oven door 2, and a tray 3 disposed inside the drying oven body 1;

[0051] A material frame is placed on the pallet 3. The material frame includes a rectangular frame plate 6. Vertical grooves 7 are evenly opened on both sides of the rectangular frame plate 6. Support rods 8 are inserted into the vertical grooves 7 between the two sides of the rectangular frame plate 6. The support rods 8 slide vertically inside the vertical grooves 7. Return springs 9 are provided between the two ends of the support rods 8 and the bottom of the vertical grooves 7. Strip grooves 10 that communicate with the top of the vertical grooves 7 are opened on the sides of the rectangular frame plate 6. The ends of the support rods 8 extend to the bottom of the strip grooves 10.

[0052] The drying oven body 1 has vertical plates 11 that slide along the length of the tray 3 on both sides inside. A columnar pressing block 13 is provided on the side of the vertical plate 11 near the material frame. The columnar pressing block 13 is adapted to the strip groove 10.

[0053] The vertical plate 11 has openings 12 along its length that mate with it, and the vertical plate 11 passes vertically through the openings 12.

[0054] The top and bottom of the tray 3 are respectively provided with mounting plates 4, and ultraviolet germicidal lamps 5 are evenly distributed on the opposite sides of the two sets of mounting plates 4. The ends of the mounting plates 4 are fixedly connected to the vertical plate 11.

[0055] The bottom of the drying oven body 1 is provided with a reciprocating mechanism 14, which is used to drive the vertical plate 11 to move back and forth along the length of the support plate 3.

[0056] Overall working principle: In the initial state, the return spring 9 is in a naturally extended state, supporting the support rod 8 upwards, so that the top of the support rod 8 forms a horizontal support surface for laying the dried fruit flat. The two ends of the support rod 8 extend to the bottom of the strip groove 10, providing a force point for the downward pressing action of the cylindrical pressure block 13. At the same time, the vertical guide structure of the vertical groove 7 ensures that the support rod 8 can only move in the vertical direction, avoiding lateral misalignment. During drying, the dried fruit to be processed is placed on the support rod 8 of the material frame, and the material frame is positioned inside the drying chamber body 1 by the stepped groove 301 of the pallet 3. After the equipment is started, the low-temperature drying function of the drying chamber body 1 and the ultraviolet sterilization lamp 5 operate synchronously. The reciprocating mechanism 14 drives the vertical plate 11 to move the mounting plate 4 and the ultraviolet sterilization lamp 5 back and forth. During the movement, the cylindrical pressing block 13 periodically presses down on the support rod 8, dynamically separating the dried fruit from the support rod 8. At this time, the bottom of the dried fruit is suspended, with no obstruction, allowing ultraviolet rays to directly irradiate the bottom of the dried fruit. When the cylindrical pressing block 13 moves to the outside of the end of the support rod 8, the return spring 9 releases its elastic potential energy, pushing the support rod 8 upward to reset and support the dried fruit again. At the same time, the cleaning component moves with the vertical plate 11, automatically collecting the fallen fruit residue, ultimately completing the integrated drying and sterilization process.

[0057] In this embodiment, stepped grooves 301 are provided on the surface of the tray 3, and the rectangular frame plate 6 slides inside the stepped grooves 301 and fits against the outside of the stepped grooves 301.

[0058] Local working principle: The stepped groove 301 on the surface of the tray 3 is designed as a guide rail positioning structure with a rectangular frame plate 6. The bottom of the rectangular frame plate 6 fits against the lower edge of the stepped groove 301, and the sides are in close contact with the outer wall of the stepped groove 301, forming a bidirectional limiting. When the material frame is pushed, the stepped groove 301 restricts its lateral displacement, ensuring that the material frame slides accurately into the preset position of the drying oven body 1, avoiding subsequent misalignment of the sterilization lamp or the cylindrical pressure block 13 failing to align with the strip groove 10.

[0059] In this embodiment, the mounting plate 4 is provided with a light-shielding strip 401 along the length direction on the side near the rectangular frame plate 6, and the light-shielding strip 401 is in contact with the surface of the rectangular frame plate 6.

[0060] Local working principle: The use of the light-shielding strip 401 can reduce ultraviolet leakage, which not only improves the sterilization efficiency, but also prevents the internal components of the equipment from aging due to ultraviolet radiation.

[0061] In this embodiment, both ends of the support rod 8 are provided with annular grooves 801, and a positioning block 802 is slidably disposed inside the annular groove 801. The top end of the positioning block 802 is fixedly connected to the inner top of the vertical groove 7.

[0062] Local working principle: The annular grooves 801 at both ends of the support rod 8 cooperate with the positioning block 802 to restrict the sliding trajectory of the support rod 8 and prevent deviation.

[0063] In this embodiment, the reciprocating mechanism 14 includes a slide groove 1401 formed at the bottom of the drying chamber body 1. A motor 1404 is provided at the end of the slide groove 1401. A reciprocating lead screw 1405 is connected to the output end of the motor 1404. A slider 1402 that cooperates with the reciprocating lead screw 1405 is slidably connected in the slide groove 1401. A horizontal plate 1403 is connected to the top of the slider 1402. The horizontal plate 1403 is fixedly connected to the bottom of the vertical plate 11.

[0064] Local working principle: After the motor 1404 of the reciprocating mechanism 14 is started, it drives the reciprocating screw 1405 to rotate. The slider 1402 moves in a reciprocating linear motion along the reciprocating screw 1405 in the slide groove 1401. The horizontal plate 1403 at the top of the slider 1402 is fixed to the bottom of the vertical plate 11, which drives the vertical plate 11 and the connected mounting plate 4 and ultraviolet germicidal lamp 5 to move back and forth synchronously, providing power for sterilization and dynamic separation.

[0065] In this embodiment, a cover plate 1406 is provided on the top of the chute 1401, and fruit pulp collection troughs 1407 are provided at both ends of the top of the cover plate 1406. A cleaning component is provided between the two sets of vertical plates 11 to push the fallen fruit pulp into the fruit pulp collection trough 1407.

[0066] Local working principle: The cover plate 1406 at the top of the slide 1401 can prevent fruit residue from entering the interior of the slide 1401, thus avoiding the accumulation of fruit residue that could cause the slider 1402 or the reciprocating screw 1405 to jam or wear.

[0067] In this embodiment, the cleaning component includes a guide groove 1408 formed at the bottom of the vertical plate 11. A scraper 1409 is provided between the guide grooves 1408 at the bottom of the two sets of vertical plates 11. The scraper 1409 slides vertically inside the guide groove 1408 and is attached to the top of the cover plate 1406. A compression spring 1410 is connected between the top of the scraper 1409 and the inner wall of the guide groove 1408.

[0068] Local working principle: The scraper 1409 is located between the guide grooves 1408 at the bottom of the two sets of vertical plates 11. The elastic force of the compression spring 1410 keeps the scraper 1409 in contact with the surface of the cover plate 1406. When the vertical plates 11 move back and forth, the scraper 1409 slides synchronously, pushing the fruit pulp falling on the cover plate 1406 to both ends, and finally collecting it into the fruit pulp collection trough 1407, thus realizing automatic cleaning of fruit pulp.

[0069] In this embodiment, the wavelength range of the ultraviolet germicidal lamp 5 is 200-280nm, and a transparent protective cover is provided on the outside of the ultraviolet germicidal lamp 5.

[0070] Local working principle: This wavelength can effectively destroy the DNA structure of microorganisms to achieve sterilization. The transparent protective cover does not affect the penetration of ultraviolet rays and can prevent fruit residue or water vapor from damaging the lamp tube.

[0071] In this embodiment, both the support rod 8 and the cylindrical pressure block 13 are cylindrical in shape, and both the support rod 8 and the cylindrical pressure block 13 are coated with a wear-resistant coating on their outer sides.

[0072] Local working principle: The cylindrical design and wear-resistant coating of the support rod 8 and the cylindrical pressure block 13 reduce sliding wear and extend service life.

[0073] like Figures 1-11 As shown in the figure, this embodiment provides a low-temperature drying and synergistic sterilization process as follows:

[0074] Step 1: Open the box door 2 and spread the dried fruit to be processed evenly on the support rod 8 of the material frame, ensuring that the dried fruit does not overlap and covers the surface of the support rod 8;

[0075] Step 2: Push the material frame along the stepped groove 301 of the tray 3 to the preset position inside the drying oven body 1, so that the material frame fits tightly against the outside of the stepped groove 301, and close the oven door 2.

[0076] Step 3: Start the ultraviolet sterilization lamp 5, and at the same time start the low temperature drying function of the drying oven body 1, turn on the preset drying parameters, and then start the motor 1404 of the reciprocating mechanism 14. The motor 1404 drives the reciprocating screw 1405 to rotate, which drives the slider 1402, the vertical plate 11 and the ultraviolet sterilization lamp 5 to move back and forth along the length of the support plate 3. The cylindrical pressure block 13 on the vertical plate 11 is embedded in the strip groove 10 and periodically presses down the support rod 8, so that the support rod 8 moves down along the vertical groove 7 and compresses the return spring 9. The dried fruit is completely separated from the support rod 8, and the ultraviolet sterilization lamp 5 continuously irradiates the dried fruit from the upper and lower sides of the material frame to sterilize it in three dimensions.

[0077] Step 4: During the drying process, the scraper 1409 of the cleaning component is always in contact with the surface of the cover plate 1406 under the elastic force of the compression spring 1410. As the vertical plate 11 moves back and forth, it pushes the fruit pulp falling on the cover plate 1406 into the fruit pulp collection troughs 1407 at both ends.

[0078] Step 5: After the drying cycle is completed, turn off the drying function of the drying chamber body 1, the reciprocating mechanism 14, and the ultraviolet sterilization lamp 5 in sequence. After the internal temperature of the equipment drops to room temperature, open the chamber door 2 and take out the material frame to complete the low-temperature drying and sterilization treatment of the dried fruit.

[0079] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A low-temperature drying and sterilization treatment device, comprising a drying oven body (1), a door (2) and a tray (3) disposed inside the drying oven body (1); Its features are: A material frame is placed on the pallet (3). The material frame includes a rectangular frame plate (6). Vertical grooves (7) are evenly opened on both sides of the rectangular frame plate (6). Support rods (8) are inserted in the vertical grooves (7) between the two sides of the rectangular frame plate (6). The support rods (8) slide vertically inside the vertical grooves (7). Return springs (9) are provided between the two ends of the support rods (8) and the bottom of the vertical grooves (7). Strip grooves (10) that communicate with the top of the vertical grooves (7) are opened on the sides of the rectangular frame plate (6). The ends of the support rods (8) extend to the bottom of the strip grooves (10). The drying oven body (1) has vertical plates (11) that slide along the length of the tray (3) on both sides inside. A columnar pressure block (13) is provided on the side of the vertical plate (11) near the material frame. The columnar pressure block (13) is adapted to the strip groove (10). The vertical plate (11) has openings (12) along its length that mate with the vertical plate (11), and the vertical plate (11) passes vertically through the openings (12); The top and bottom of the tray (3) are respectively provided with mounting plates (4), and ultraviolet germicidal lamps (5) are evenly distributed on the opposite sides of the two sets of mounting plates (4). The ends of the mounting plates (4) are fixedly connected to the vertical plate (11). The bottom of the drying oven body (1) is provided with a reciprocating mechanism (14) for driving the vertical plate (11) to reciprocate along the length of the tray (3).

2. The low-temperature drying and synergistic sterilization treatment device according to claim 1, characterized in that: The surface of the tray (3) is provided with stepped grooves (301), and the rectangular frame plate (6) slides inside the stepped grooves (301) and fits against the outside of the stepped grooves (301).

3. The low-temperature drying and synergistic sterilization treatment device according to claim 1, characterized in that: The mounting plate (4) has a light-shielding strip (401) along its length on the side near the rectangular frame plate (6), and the light-shielding strip (401) is in contact with the surface of the rectangular frame plate (6).

4. The low-temperature drying and synergistic sterilization treatment device according to claim 1, characterized in that: Both ends of the support rod (8) are provided with annular grooves (801), and a positioning block (802) is slidably arranged inside the annular groove (801). The top of the positioning block (802) is fixedly connected to the inner top of the vertical groove (7).

5. The low-temperature drying and synergistic sterilization treatment device according to claim 1, characterized in that: The reciprocating mechanism (14) includes a slide groove (1401) opened at the bottom of the drying oven body (1). A motor (1404) is provided at the end of the slide groove (1401). A reciprocating lead screw (1405) is connected to the output end of the motor (1404). A slider (1402) that cooperates with the reciprocating lead screw (1405) is slidably connected in the slide groove (1401). A horizontal plate (1403) is connected to the top of the slider (1402). The horizontal plate (1403) is fixedly connected to the bottom of the vertical plate (11).

6. The low-temperature drying and synergistic sterilization treatment device according to claim 5, characterized in that: The top of the chute (1401) is covered with a cover plate (1406), and both ends of the top of the cover plate (1406) are provided with fruit pulp collection troughs (1407). A cleaning component is provided between the two sets of vertical plates (11) to push the fallen fruit pulp into the fruit pulp collection troughs (1407).

7. The low-temperature drying and synergistic sterilization treatment device according to claim 6, characterized in that: The cleaning assembly includes a guide groove (1408) at the bottom of the vertical plate (11), a scraper (1409) is provided between the guide grooves (1408) at the bottom of the two sets of vertical plates (11), and the scraper (1409) slides vertically inside the guide groove (1408) and fits against the top of the cover plate (1406). A compression spring (1410) is connected between the top of the scraper (1409) and the inner wall of the guide groove (1408).

8. The low-temperature drying and synergistic sterilization treatment device according to claim 1, characterized in that: The wavelength range of the ultraviolet germicidal lamp (5) is 200-280nm, and a transparent protective cover is provided on the outside of the ultraviolet germicidal lamp (5).

9. The low-temperature drying and synergistic sterilization treatment device according to claim 1, characterized in that: Both the support rod (8) and the cylindrical pressure block (13) are cylindrical in shape, and both the support rod (8) and the cylindrical pressure block (13) are coated with a wear-resistant coating on their outer sides.

10. A low-temperature drying and synergistic sterilization process, based on a low-temperature drying and synergistic sterilization device according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Open the box door (2) and spread the dried fruit to be processed evenly on the support rod (8) of the material frame, ensuring that the dried fruit does not overlap and covers the surface of the support rod (8); Step 2: Push the material frame along the stepped groove (301) of the tray (3) to the preset position inside the drying oven body (1), so that the material frame fits tightly against the outside of the stepped groove (301), and close the oven door (2); Step 3: Start the ultraviolet sterilization lamp (5), and at the same time start the low temperature drying function of the drying oven body (1), turn on the preset drying parameters, and then start the motor (1404) of the reciprocating mechanism (14). The motor (1404) drives the reciprocating screw (1405) to rotate, which drives the slider (1402), the vertical plate (11) and the ultraviolet sterilization lamp (5) to move back and forth along the length of the tray (3). The cylindrical pressure block (13) on the vertical plate (11) is embedded in the strip groove (10) and periodically presses down the support rod (8), so that the support rod (8) moves down along the vertical groove (7) and compresses the reset spring (9). The dried fruit is completely separated from the support rod (8), and the ultraviolet sterilization lamp (5) continuously irradiates the dried fruit from the upper and lower sides of the material frame to sterilize it in three dimensions. Step 4: During the drying process, the scraper (1409) of the cleaning component is always in contact with the surface of the cover plate (1406) under the elastic force of the compression spring (1410), and pushes the fruit pulp falling on the cover plate (1406) into the fruit pulp collection troughs (1407) at both ends as the vertical plate (11) moves back and forth. Step 5: After the drying cycle is over, turn off the drying function of the drying chamber body (1), the reciprocating mechanism (14), and the ultraviolet sterilization lamp (5) in sequence. After the internal temperature of the equipment drops to room temperature, open the chamber door (2) and take out the material frame to complete the low-temperature drying and sterilization treatment of dried fruit.

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