Multi-layer hot air uniform distribution type fruit drying device

Abstract

The utility model discloses a kind of multi-layer hot air uniform distribution type fruit drying device, it is related to fruit and vegetable drying appliance technical field, including the drying box with supporting leg, the top surface of drying box is communicated with the protective cover, and the exhaust tank of the upper side fixed of drying box rear end;Exhaust tank top middle part is connected with the exhaust pipe of inner cavity installation, the other end of exhaust pipe is communicated with the top surface of drying box and placed in the inner cavity of drying box, and drying box is installed with auxiliary drying assembly;The utility model realizes hot air three-dimensional uniform distribution drying by drying assembly;First fan of exhaust tank in drying assembly constructs top airflow circulation channel through exhaust pipe, porous exhaust platform, second fan of gas supply tank forms two sides hot air conveying path through first gas supply pipe, second gas supply pipe and porous air supply pipe, forms three-dimensional hot air, solves the problem of local temperature difference in tank caused by existing single direction air supply.

Description

Technical Field

[0001] This utility model relates to the technical field of fruit and vegetable drying equipment, and in particular to a multi-layer hot air uniformly distributed fruit drying device. Background Technology

[0002] In the field of fruit and vegetable drying equipment technology, multi-layer fruit drying devices are key equipment for realizing batch dehydration of fruits and extending their shelf life. The uniformity of drying directly affects the taste, color, and storage stability of the finished fruit, which is of great significance to improving the quality of the fruit and vegetable processing industry. However, in practical applications, existing multi-layer fruit drying devices still have core problems such as unbalanced hot air distribution and insufficient heat exchange, which seriously restrict the drying effect. The specific defects are as follows: On the one hand, existing multi-layer drying devices mostly adopt a unidirectional hot air conveying structure, such as only setting an exhaust component at the top of the drying box or only arranging an air supply duct on one side of the box. This makes it impossible to form a multi-dimensional, fully covered hot air circulation network inside the box. This design results in significant differences in temperature distribution between different levels and areas inside the drying box: the area near the hot air output end has a high concentration of hot air and a high temperature, while the area far from the output end has poor hot air circulation and a low temperature, forming obvious "local temperature difference zones". Fruits in the high-temperature areas are prone to shriveling, sugar loss, and even scorching and spoilage due to excessive heating; fruits in the low-temperature areas are difficult to dehydrate fully, with high internal moisture content, which makes them prone to mold growth during subsequent storage, seriously affecting the overall quality and market value of the dried fruit. Therefore, the above problems need to be solved. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-layer hot air uniformly distributed fruit drying device.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a multi-layer hot air uniformly distributed fruit drying device, including a drying box with supporting legs, a protective cover connected to the top surface of the drying box, and exhaust boxes fixedly connected to both sides above the rear end of the drying box; an exhaust pipe is installed in the inner cavity of the top surface of the exhaust box, the other end of the exhaust pipe is connected to the top surface of the drying box and placed in the inner cavity of the drying box, two hinged doors are connected to the front end of the drying box, and air supply boxes are fixedly connected to the middle of both sides of the drying box; a water outlet pipe is installed in the middle of the bottom surface of the drying box, and a switch valve is connected to the bottom surface of the water outlet pipe through a flange; drying components are installed in the exhaust box and the air supply box, and auxiliary drying components are installed in the drying box.

[0005] Preferably, the drying assembly includes a first fan installed in the exhaust box and a second fan installed in the air supply box, and the other end of the exhaust pipe is fixed to an exhaust vent with a porous structure.

[0006] Preferably, a first air supply pipe is installed on both the top and bottom surfaces of the air supply box, and a second air supply pipe is installed in the middle of the adjacent surfaces of the two air supply boxes. The other ends of the first and second air supply pipes are connected to the drying box and placed inside the drying box. The other ends of the first and second air supply pipes are connected to an air supply pipe with a porous structure.

[0007] Preferably, a mounting base is slidably connected inside the air supply pipe, and a heating wire is fixedly connected to one side of the inner cavity of the air supply pipe, with the other end of the heating wire fixedly connected to the mounting base.

[0008] Preferably, the auxiliary drying assembly includes a stepper motor installed inside the protective cover cavity and a positioning platform installed below the drying chamber cavity; the output shaft of the stepper motor is connected to a rotating rod via a coupling, the lower end of the rotating rod is rotatably connected to the top surface of the positioning platform, and two rotating platforms with the axis of the rotating rod as the center are respectively installed on the rotating rod from top to bottom, the two rotating platforms are respectively placed between two air supply pipes on the same side inside the drying assembly, and multiple equidistant mounting rods are installed on the outside of the rotating platforms, and positioning rods are fixedly connected to the bottom surface of the distal end of each of the multiple mounting rods, and positioning blocks are fixedly connected to the lower outer end of the positioning rods.

[0009] Preferably, the lower end of the positioning rod is rotatably engaged with a positioning filter screen. The top surface of the positioning filter screen has a positioning hole in the center that matches the positioning rod. The positioning hole has a positioning groove around its periphery that matches the positioning block. The positioning groove passes through the positioning filter screen, and the bottom surface of the positioning filter screen has a locking groove that matches the positioning block. The positioning block is rotatably engaged in the locking groove by passing through the positioning groove. The bottom surface of the positioning filter screen is connected to a placement platform with a multi-hole structure. The outer center of the placement platform has a discharge hole.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model achieves three-dimensional uniform hot air drying through the drying component; the first fan of the exhaust box in the drying component constructs a top airflow circulation channel through the exhaust pipe and the multi-hole exhaust platform, and the second fan of the air supply box forms a hot air delivery path on both sides through the first air supply pipe, the second air supply pipe and the multi-hole air supply pipe, forming a three-dimensional hot air, which solves the problem of local temperature difference in the box caused by the existing single-direction air supply; the stepper motor of the auxiliary drying component drives the rotating rod and the rotating table to rotate, which drives the positioning filter connected to the mounting rod and the positioning rod to rotate synchronously with the placement platform, so that the fruit in the placement platform comes into contact with the hot air in all directions without dead angles, avoiding the phenomenon of some parts not being dried or some parts being over-dried due to insufficient heat exchange, improving the color, taste and quality of the dried fruit, and meeting the core requirements of drying uniformity in the fruit and vegetable processing field. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the air supply duct and positioning platform structure proposed in this utility model; Figure 3 This is a schematic diagram of the exhaust duct and stepper motor structure proposed in this utility model. Figure 4 This is a schematic diagram of the second fan and air supply duct structure proposed in this utility model; Figure 5 This is a schematic diagram of the first fan and exhaust platform structure proposed in this utility model; Figure 6 This is a schematic diagram of the mounting base and heating wire structure proposed in this utility model; Figure 7 This is a schematic diagram of the positioning filter and placement platform structure proposed in this utility model; Figure 8 This is a bottom view of the positioning filter proposed in this utility model; Figure 9 This is a schematic diagram of the positioning rod and positioning block structure proposed in this utility model.

[0012] The following are the components listed in the diagram: 1. Drying oven; 2. Protective cover; 3. Exhaust box; 4. Opening door; 5. Air supply box; 6. Water outlet pipe; 7. Switch valve; 8. First fan; 9. Exhaust table; 10. Second fan; 11. Air supply pipe; 12. Mounting base; 13. Heating wire; 14. Stepper motor; 15. Mounting rod; 16. Positioning rod; 17. Positioning block; 18. Positioning filter; 19. Placement platform; 20. Positioning table. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: See Figures 1 to 9This utility model discloses a multi-layer hot air uniformly distributed fruit drying device, including a drying box 1 with supporting legs. The drying box 1 facilitates the installation of subsequent drying components and auxiliary drying components. The first fan 8 and the second fan 10 inside the drying box 1 are both connected to an external controller. A temperature sensor is installed inside the drying box 1. A protective cover 2 is connected to the top surface of the drying box 1, which facilitates the installation of a stepper motor 14 through external welding or snap-fit ​​components. Exhaust boxes 3 are fixed to both sides of the upper rear end of the drying box 1. The exhaust boxes 3 facilitate the installation of the first fan 8 through welding. An exhaust pipe is installed in the middle of the top surface of the exhaust box 3, which is connected to the inner cavity. The other end of the exhaust pipe is connected to the drying box 1. The top surface is open and placed inside the drying chamber 1. Two hinged doors 4 are connected to the front of the drying chamber 1, facilitating opening and closing of the drying chamber 1 and allowing operators to easily place and remove the fruit to be dried. Air supply boxes 5 are fixedly connected to the middle of both sides of the drying chamber 1. A water outlet pipe 6 is installed in the middle of the bottom surface of the drying chamber 1, guiding the moisture from the dried fruit to the bottom of the drying chamber 1. A switch valve 7 is connected to the bottom of the water outlet pipe 6 via a flange, allowing control of the water outlet pipe 6 and facilitating the discharge of water. The switch valve 7 should always be connected to an external circulation collection box via an external connection pipe. The exhaust box 3 and the air supply box 5 are also connected to the drying chamber 1. A drying assembly is installed, and an auxiliary drying assembly is installed inside the drying chamber 1. The drying assembly includes a first fan 8 installed inside the exhaust box 3 and a second fan 10 installed inside the air supply box 5. The first fan 8 facilitates the supply of air at a specified temperature to the exhaust platform 9; the second fan 10 facilitates the supply of air at a specified temperature to the air supply duct 11, thus dynamically stabilizing the temperature inside the drying chamber 1. The other end of the exhaust pipe is fixedly connected to an exhaust platform 9 with a multi-hole structure, which facilitates the exhaust of hot air from inside the drying chamber 1 to the outside of the drying chamber 1 in conjunction with the exhaust pipe and the first fan 8. The top and bottom surfaces of the air supply box 5 are both connected to a first air supply pipe, and the middle of the adjacent surfaces of the two air supply boxes 5 is connected to a second air supply pipe. The first and second air supply pipes are connected at their other ends to the drying chamber 1 and placed inside the drying chamber 1. Both the first and second air supply pipes are connected to a perforated air supply pipe 11 at their other ends, which facilitates the transport of air energy from the second fan 10 to the drying chamber 1. A mounting base 12 is slidably connected inside the air supply pipe 11. The mounting base 12 is equipped with a snap-fit ​​component, which engages with the air supply pipe 11 to snap-fit ​​the heating wire 13. A heating wire 13 is fixedly connected to one side of the inner cavity of the air supply pipe 11, and the other end of the heating wire 13 is fixedly connected to the mounting base 12. The heating wire 13 facilitates the heating of the air passing through the first and second air supply pipes before it enters the drying chamber 1.

[0015] In this utility model, the auxiliary drying assembly includes a stepper motor 14 installed inside the protective cover 2 and a positioning platform 20 installed below the inner cavity of the drying chamber 1. The stepper motor 14 facilitates the connection of a rotating rod via a coupling. The positioning platform 20 facilitates the smooth rotation of the auxiliary rotating rod. The output shaft of the stepper motor 14 is connected to the rotating rod via a coupling. The lower end of the rotating rod is rotatably connected to the top surface of the positioning platform 20. Two rotating platforms, centered on the axis of the rotating rod, are installed on the rotating rod from top to bottom. The two rotating platforms are respectively placed between two air supply pipes 11 on the same side inside the drying assembly. Multiple equidistant mounting rods 15 are installed on the outer side of the rotating platforms. The mounting rods 15 facilitate the fixing of positioning rods 16 via welding. Positioning rods 16 are fixed to the bottom surface of the distal ends of the multiple mounting rods 15. Positioning blocks 17 are fixed to the bottom surface of the positioning rods 15 via welding. The positioning blocks 17 are fixed to the lower outer end of the positioning rods 16 via welding. The positioning filter 18 is secured by the positioning groove and snap-fit ​​groove provided with it. The positioning rod 16 is rotatably snapped with the positioning filter 18. The positioning filter 18 facilitates the connection of the external bolt to the placement platform 19 and allows the fruit placed on the placement platform 19 to have more contact with the hot air, thus accelerating the drying time and improving the drying quality. The top surface of the positioning filter 18 has a positioning hole in the center that matches the positioning rod 16. The positioning groove around the positioning hole is provided for the positioning block 17. The positioning groove passes through the positioning filter 18, and the bottom surface of the positioning filter 18 has a snap-fit ​​groove for the positioning block 17. The positioning block 17 passes through the positioning groove and is rotatably snapped into the snap-fit ​​groove. The bottom surface of the positioning filter 18 is connected to the placement platform 19, which has a perforated structure. The outer center of the placement platform 19 is connected to a discharge hole. The placement platform 19 allows operators to place the fruit to be dried inside for subsequent drying.

[0016] Working principle: When using this utility model, place the drying box 1 on the designed base surface, connect the switch valve 7 to the external circulation collection box through the external connecting pipe, and open the switch valve 7. Then, power on the equipment. Open the switch door 4 and rotate the positioning filter 18 relative to the positioning rod 16. The positioning block 17 fixed on the positioning rod 16 will pass through the snap-fit ​​groove and positioning groove of the positioning filter 18 to remove the positioning filter 18 and the placement platform 19 connected to the positioning filter 18. Then, the drying box 19 is placed on the platform to be dried. The dried fruit is placed in the placement table 19, and then the placement table 19 is reinstalled on the bottom of the positioning filter 18 (the fruit to be dried can also be placed in the placement table 19 through the discharge hole). The positioning filter 18 can be installed in reverse order of the above disassembly steps. Then the operator closes the switch door 4 and starts the first fan 8 installed in the exhaust box 3 and the second fan 10 installed in the air supply box 5. The second fan 10 blows air into the first air supply pipe and the second air supply pipe, and then through the air supply pipe 11 and the mounting base. Heating wire 13 between 12 heats the air, which is then sent into the drying chamber 1 through air supply pipe 11. At the same time, the first fan 8 starts, providing negative pressure suction to the exhaust table 9 through the exhaust pipe, expelling the hot air that has reached the top surface of the drying chamber 1. Simultaneously, the stepper motor 14 inside the protective cover 2 starts, driving the rotating rod connected to the positioning table 20 to rotate. Since the rotating rod is fixed to the rotating table, and the rotating table is fixed to the mounting rod 15, and the mounting rod 15 is fixed to the positioning rod 16, the positioning... Rod 16 is fixedly connected to positioning block 17, so the rotation of the rotating rod will drive the positioning filter 18 to rotate. The fruit in the placement table 19 will drain the internal moisture under drying. The drained moisture will be discharged into the external circulation collection box through the water outlet pipe 6 and the switch valve 7 for recycling in subsequent processes. After drying, the operator opens the switch door 4 and rotates the positioning filter 18 to remove the positioning filter 18 and the placement table 19 together. Then the placement table 19 is removed to collect the dried fruit, and then it is dried a second time.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-layer hot air uniformly distributed fruit drying device, comprising a drying box (1) with supporting legs, characterized in that: The top surface of the drying box (1) is connected to a protective cover (2), and exhaust boxes (3) are fixedly connected to the upper sides of the rear end of the drying box (1); an exhaust pipe is installed in the middle of the top surface of the exhaust box (3) and connected to the inner cavity. The other end of the exhaust pipe is connected to the top surface of the drying box (1) and placed in the inner cavity of the drying box (1). Two switch doors (4) are hinged to the front end of the drying box (1), and air supply boxes (5) are fixedly connected to the middle of both sides of the drying box (1). A water outlet pipe (6) is installed in the middle of the bottom surface of the drying box (1). A switch valve (7) is connected to the bottom surface of the water outlet pipe (6) through a flange. Drying components are installed in the exhaust box (3) and the air supply box (5), and auxiliary drying components are installed in the drying box (1). The drying assembly includes a first fan (8) installed in the exhaust box (3) and a second fan (10) installed in the air supply box (5). The other end of the exhaust pipe is fixed to an exhaust vent (9) with a porous structure. The top and bottom surfaces of the air supply box (5) are connected to the first air supply pipe, and the middle of the adjacent surfaces of the two air supply boxes (5) are connected to the second air supply pipe. The other ends of the first and second air supply pipes are connected to the drying box (1) and placed in the inner cavity of the drying box (1). The other ends of the first and second air supply pipes are connected to the air supply pipe (11) with a porous structure. The auxiliary drying assembly includes a fan installed in the protective cover (2). The inner cavity contains a stepper motor (14) and a positioning platform (20) installed below the inner cavity of the drying chamber (1). The output shaft of the stepper motor (14) is connected to a rotating rod via a coupling. The lower end of the rotating rod is rotatably connected to the top surface of the positioning platform (20). The rotating rod is equipped with two rotating platforms that are circular with the axis of the rotating rod as the center from top to bottom. The two rotating platforms are respectively placed between two air supply pipes (11) on the same side inside the drying assembly. Multiple equidistant mounting rods (15) are installed on the outside of the rotating platforms. Positioning rods (16) are fixed to the bottom surface of the distal end of the multiple mounting rods (15). Positioning blocks (17) are fixed to the lower end of the outer side of the positioning rods (16).

2. The multi-layer hot air uniformly distributed fruit drying device according to claim 1, characterized in that: The air supply pipe (11) is slidably connected to a mounting base (12), and a heating wire (13) is fixedly connected to one side of the inner cavity of the air supply pipe (11), and the other end of the heating wire (13) is fixedly connected to the mounting base (12).

3. The multi-layer hot air uniformly distributed fruit drying device according to claim 1, characterized in that: The lower end of the positioning rod (16) is rotatably engaged with a positioning filter (18). The top surface of the positioning filter (18) is provided with a positioning hole that matches the positioning rod (16). The positioning hole is provided with a positioning groove that matches the positioning block (17) around its periphery. The positioning groove passes through the positioning filter (18). The bottom surface of the positioning filter (18) is provided with a snap-fit ​​groove that matches the positioning block (17). The positioning block (17) is rotatably engaged in the snap-fit ​​groove by passing through the positioning groove. The bottom surface of the positioning filter (18) is connected to a placement platform (19) with a multi-hole structure. The outer center of the placement platform (19) is connected to a discharge hole.

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