A freeze-drying device for dehydrating and preserving fruits and vegetables

Abstract

The present invention relates to the technical field of fruit and vegetable freeze-drying equipment, and in particular to a freeze-drying equipment for dehydrating and preserving fruits and vegetables. The present invention provides a freeze-drying equipment for dehydrating and preserving fruits and vegetables that can avoid damage to fruits and vegetables and is convenient for taking materials, including a bottom plate, a U-shaped fixing frame, a belt conveyor, etc.; a U-shaped fixing frame is symmetrically fixedly connected to the left and front of the top of the bottom plate, a belt conveyor is slidably connected between the two U-shaped fixing frames, and a fixing plate is fixedly connected to the front and rear sides of the belt conveyor. The fruits and vegetables are laid on three placement frames respectively, so that the fruits and vegetables are evenly distributed to improve the freezing effect. Since the fruits and vegetables are loaded in layers in sequence, the fruits and vegetables are not easily damaged, so that the quality of the finished products of the fruits and vegetables after freeze-drying is improved. After the second sealing plate is lifted, the three placement frames are tilted in sequence, so that the freeze-dried fruits and vegetables can be unloaded, so that it is convenient to take the fruits and vegetables out of the freezing bin.

Description

Technical Field

[0001] The invention relates to the technical field of fruit and vegetable freeze-drying equipment, and in particular to a freeze-drying equipment used for dehydrating and preserving fruits and vegetables. Background Art

[0002] Patent publication number CN117694395A discloses a freeze-drying device for dehydrating and preserving fruits and vegetables, including a base and a freezing chamber, wherein the base is fixedly mounted on the left side of the freezing chamber, and further includes a first bracket, which is arranged on the left side of the base, and a transmission mechanism is installed on the top of the first bracket; a stirring mechanism, wherein the stirring mechanism includes a gear ring rotatably connected to the inner wall of the freezing chamber; and a driving mechanism, wherein the driving mechanism includes a first servo motor fixedly mounted on the front side wall of the base. In this application, by setting the stirring component, the fruits and vegetables on the fixed plate can be stirred multiple times, so that the subsequent fruits and vegetables can be fully and evenly freeze-dried. By setting the displacement component, the upper and lower positions of the pressing roller and the silica gel strip can be adjusted according to the hardness of different fruits and vegetables to avoid damaging the fruits and vegetables. By setting the drying mechanism, the cold air inside the freezing chamber can be recycled by starting the vacuum pump and the cold trap.

[0003] However, when the above scheme is implemented, some fruits and vegetables that are relatively soft before freeze-drying, such as strawberries, will fall directly from the opening provided on the uppermost fixed plate to the lowermost fixed plate. They are easily damaged after falling, resulting in low quality of the freeze-dried fruits and vegetables. In addition, since the fixed plate is a fixed arrangement of three layers, it is inconvenient to take out the cooled and dried fruits and vegetables when necessary. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a freeze-drying device for dehydrating and preserving fruits and vegetables, which can avoid damage to fruits and vegetables and facilitate material collection.

[0005] The technical scheme is: a freeze-drying device for dehydrating and preserving fruits and vegetables, comprising a bottom plate, a U-shaped fixing frame, a belt conveyor, a fixing plate, a hydraulic cylinder, a freezing bin, a placement frame and a vacuum pump, wherein a U-shaped fixing frame is symmetrically fixedly connected to the left side of the top of the bottom plate, a belt conveyor is slidably connected between the two U-shaped fixing frames, and a fixing plate is fixedly connected to the front and rear sides of the belt conveyor, a hydraulic cylinder is symmetrically installed to the left side of the top of the bottom plate, and the piston rod ends of the two hydraulic cylinders are respectively fixedly connected to the upper parts of the adjacent fixing plates, a freezing bin is arranged on the right side of the top of the bottom plate, three placement frames are rotatably connected from top to bottom through a rotating shaft between the inner walls of the front and rear panels of the freezing bin, three openings are opened in intervals from top to bottom on the left and right panels of the freezing bin, and the three openings correspond to the three placement frames respectively, a vacuum pump is arranged on the top of the freezing bin, and also comprises a connecting component, a closing component and a tilting mechanism, a connecting component for conveying fruits and vegetables is arranged between the belt conveyor and the freezing bin, a closing component for sealing the opening is arranged on the left and right sides of the freezing bin, and a tilting mechanism for respectively pushing the three placement frames to rotate and tilt is arranged on the front and rear sides of the freezing bin.

[0006] As a further preferred scheme, the connecting assembly includes a blanking plate, a first I-shaped plate and a second I-shaped plate. The right end of the belt conveyor is fixedly connected to the blanking plate, the three openings set on the left panel of the freezing bin are fixedly connected to the first I-shaped plate, and the three openings set on the right panel of the freezing bin are fixedly connected to the second I-shaped plate.

[0007] As a further preferred scheme, the closing assembly includes a guide rod, a first sealing plate, an electric push rod a, a fixed block a, a sliding frame, a second sealing plate, an electric push rod b and a connecting plate. Three pairs of guide rods are fixedly connected to the outer wall of the left panel of the freezer from top to bottom in an interval manner, and a first sealing plate is slidably connected between each pair of guide rods. Three electric push rods a are installed at intervals on the outer wall of the left panel of the freezer from top to bottom, and the ends of the telescopic rods of the three electric push rods a are fixedly connected to the adjacent first sealing plates. Four fixed blocks a are fixedly connected to the outer wall of the right panel of the freezer, and a sliding frame is slidably connected between two adjacent fixed blocks a. Three second sealing plates are fixedly connected to the two sliding frames from top to bottom in an interval manner. Two electric push rods b are fixedly connected to the upper side of the outer wall of the right panel of the freezer, and a connecting plate is fixedly connected between the ends of the telescopic rods of the two electric push rods b, and the front and rear ends of the connecting plate are respectively fixedly connected to the two sliding frames.

[0008] As a further preferred scheme, the tilting mechanism includes a fixed seat, a sliding rod, a return spring, an extrusion block, a rocker, an extrusion rod and a push rod. The outer walls of the front and rear panels of the freezing chamber are fixedly connected with three pairs of fixed seats at intervals from top to bottom. The fixed seats are slidably connected with sliding rods. Reset springs are connected between the sliding rods and adjacent fixed seats. An extrusion block is fixedly connected between the left ends of two adjacent sliding rods. The ends of the rotating shafts on the front and rear sides of the three placement frames are fixedly connected with rockers. The extrusion blocks are provided with inclined grooves, and the rockers cooperate with the adjacent extrusion blocks through the inclined grooves. The left sides of the extrusion blocks are fixedly connected with extrusion rods, and the right side of the belt conveyor is symmetrically fixedly connected with push rods.

[0009] As a further preferred scheme, it also includes slide rails, mounting plates, mounting seats, bidirectional screw rods, motors and levers. Three slide rails are fixedly connected at intervals from top to bottom on the inner walls of the front and rear panels of the freezer compartment, and a mounting plate is slidably connected between the two slide rails at the same height. Three mounting seats are fixedly connected at intervals from top to bottom on the inner walls of the left and right panels of the freezer compartment, and a bidirectional screw rod is rotatably connected between the two mounting seats at the same height. Motors are installed on the three mounting seats on the right side, and the output shaft ends of the three motors are fixedly connected to the right ends of the adjacent bidirectional screw rods. Multiple levers are fixedly connected at intervals on the three mounting plates.

[0010] As a further preferred solution, the lever is made of silicone.

[0011] As a further preferred scheme, it also includes a limit plate, a fixed block b, an intercepting frame, a turntable, a torsion spring, a column, a sleeve and a linkage rod. The limit plate is symmetrically fixedly connected to the left side of the freezing warehouse, and the fixed block b is symmetrically fixedly connected to the right side of the belt conveyor. An intercepting frame is rotatably connected between the two fixed blocks b, and the front and rear ends of the intercepting frame are fixedly connected to turntables. Torsion springs are connected between the two turntables and adjacent fixed blocks b. The side walls of the two turntables away from each other are fixedly connected with columns, and the sleeves are symmetrically fixedly connected to the right side of the belt conveyor, and linkage rods are slidably connected in the two sleeves.

[0012] As a further preferred solution, the blocking frame consists of a long axis and short axes evenly arranged thereon, and the short axes are made of flexible materials.

[0013] The present invention has the following advantages: 1. Fruits and vegetables are laid on three placement frames respectively, so that the fruits and vegetables are evenly distributed, thereby improving the freezing effect. Since the fruits and vegetables are loaded in layers in sequence, the fruits and vegetables are not easily damaged, so that the quality of the finished products of the freeze-dried fruits and vegetables is improved. After the second sealing plate is lifted, the three placement frames are tilted in sequence, so that the freeze-dried fruits and vegetables can be unloaded, so that the fruits and vegetables are conveniently taken out from the freezing bin.

[0014] 2. By setting up a motor, a bidirectional screw rod and a lever, when the freezing chamber freezes the fruits and vegetables placed on the frame, the lever moves the fruits and vegetables, so that the fruits and vegetables are in more uniform and sufficient contact with the cold air in the freezing chamber, thereby improving the freezing effect of the fruits and vegetables, and further enhancing the subsequent drying effect.

[0015] 3. By setting up a blocking frame, when the staff drives the belt conveyor to move up and down, the blocking frame rotates to block the fruits and vegetables on the belt conveyor, preventing the fruits and vegetables from sliding into the discharge plate due to vibration when the belt conveyor moves up and down, and finally falling from the right end of the discharge plate, causing waste of fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the placement frame, the second I-shaped plate and the fixing block a of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the blanking plate and the first I-shaped plate of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide rod, the first sealing plate and the electric push rod a of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the sliding frame, the second sealing plate and the electric push rod b of the present invention.

[0021] Figure 6 It is a schematic exploded view of the three-dimensional structure of the sliding frame, the second sealing plate and the connecting plate of the present invention.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the tilting mechanism of the present invention.

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the slide rail, mounting plate and mounting seat of the present invention.

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Among them: 1-bottom plate, 2-U-shaped fixed frame, 3-belt conveyor, 31-fixed plate, 32-hydraulic cylinder, 4-freezing bin, 41-placing frame, 5-vacuum pump, 6-connecting assembly, 61-unloading plate, 62-first I-shaped plate, 63-second I-shaped plate, 7-closing assembly, 71-guide rod, 72-first sealing plate, 73-electric push rod a, 74-fixed block a, 75-sliding frame, 76-second sealing plate, 77-electric push rod b, 78-connection Plate, 8-tilt mechanism, 81-fixed seat, 82-slide rod, 83-reset spring, 84-extrusion block, 85-rocker, 86-extrusion rod, 87-top rod, 91-slide rail, 92-mounting plate, 93-mounting seat, 94-bidirectional screw rod, 95-motor, 96-shift rod, 101-limit plate, 102-fixed block b, 103-blocking frame, 104-turntable, 105-torsion spring, 106-column, 107-sleeve, 108-linkage rod. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific embodiments. It should also be noted that, unless otherwise clearly specified and limited, terms such as: setting, installing, connecting, and connecting should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment: A freeze-drying device for dehydrating and preserving fruits and vegetables, such as Figure 1-Figure 9As shown, it includes a bottom plate 1, a U-shaped fixing frame 2, a belt conveyor 3, a fixing plate 31, a hydraulic cylinder 32, a freezing bin 4, a placing frame 41 and a vacuum pump 5. The U-shaped fixing frame 2 is symmetrically welded and fixed on the left side of the top of the bottom plate 1. The belt conveyor 3 is slidably connected between the two U-shaped fixing frames 2. The belt conveyor 3 can only slide up and down along the U-shaped fixing frame 2. The fixing plates 31 are welded and fixed on both the front and rear sides of the belt conveyor 3. The hydraulic cylinders 32 are symmetrically installed on the left side of the top of the bottom plate 1 by bolts. The piston rod ends of the two hydraulic cylinders 32 are respectively fixedly connected to the upper parts of the adjacent fixing plates 31. The freezing bin 4 is provided on the right side of the top of the bottom plate 1 by bolts. The inner surfaces of the front and rear panels of the freezing bin 4 are Three placement frames 41 are connected between the walls from top to bottom through a rotating shaft, and three openings are provided in intervals from top to bottom on the left and right panels of the freezing bin 4, and the three openings correspond to the three placement frames 41 respectively. A vacuum pump 5 is provided on the top of the freezing bin 4 through bolts, and an exhaust pipe provided on the vacuum pump 5 is connected to the internal space of the freezing bin 4. It also includes a connecting component 6, a closing component 7 and a tilting mechanism 8. A connecting component 6 for conveying fruits and vegetables is provided between the belt conveyor 3 and the freezing bin 4, and a closing component 7 for sealing the opening is provided on the left and right sides of the freezing bin 4. A tilting mechanism 8 for respectively pushing the three placement frames 41 to rotate and tilt is provided on the front and back sides of the freezing bin 4.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, the connecting component 6 includes a blanking plate 61, a first I-shaped plate 62 and a second I-shaped plate 63, the right end of the belt conveyor 3 is fixedly connected to the blanking plate 61, the three openings set on the left panel of the freezing bin 4 are fixedly connected to the first I-shaped plate 62, the three openings set on the right panel of the freezing bin 4 are fixedly connected to the second I-shaped plate 63, the side where the placement frame 41 and the first I-shaped plate 62 are close to each other are symmetrically provided with inclined surfaces up and down, and the side where the placement frame 41 and the second I-shaped plate 63 are close to each other are also provided with inclined surfaces up and down, and when the placement frame 41 rotates around the rotating shaft, it will not touch the adjacent first I-shaped plate 62 or second I-shaped plate 63.

[0029] like Figure 1 , Figure 2 and Figure 4-Figure 6As shown, the closing assembly 7 includes a guide rod 71, a first sealing plate 72, an electric push rod a73, a fixed block a74, a sliding frame 75, a second sealing plate 76, an electric push rod b77 and a connecting plate 78. Three pairs of guide rods 71 ​​are welded and fixed to the outer wall of the left panel of the freezing bin 4 from top to bottom in an interval manner. The first sealing plate 72 is slidably connected between each pair of guide rods 71. Three electric push rods a73 are installed on the outer wall of the left panel of the freezing bin 4 from top to bottom in an interval manner by bolts. The ends of the telescopic rods of the three electric push rods a73 are fixedly connected to the adjacent first sealing plates 72. Four fixed blocks a74 are welded and fixed at intervals on the outer wall of the right panel of the freezing bin 4, and a sliding frame 75 is slidably connected between two adjacent fixed blocks a74. Three second sealing plates 76 are welded and fixed at intervals from top to bottom between the two sliding frames 75. The second sealing plates 76 can close the adjacent openings. Two electric push rods b77 are fixedly connected to the upper side of the outer wall of the right panel of the freezing bin 4, and a connecting plate 78 is fixedly connected between the ends of the telescopic rods of the two electric push rods b77. The front and rear ends of the connecting plate 78 are respectively fixedly connected to the two sliding frames 75.

[0030] like Figure 1 and Figure 7 As shown, the tilting mechanism 8 includes a fixed seat 81, a slide bar 82, a return spring 83, an extrusion block 84, a rocker 85, an extrusion rod 86 and a push rod 87. The outer walls of the front and rear panels of the freezing bin 4 are welded and fixed with three pairs of fixed seats 81 at intervals from top to bottom. The fixed seats 81 are slidably connected with slide bars 82. Reset springs 83 are connected between the slide bars 82 and the adjacent fixed seats 81. An extrusion block 84 is fixedly connected between the left ends of two adjacent slide bars 82. The ends of the rotating shafts on the front and rear sides of the three placement frames 41 are fixedly connected with rockers 85. The extrusion blocks 84 are each provided with an inclined groove, and the rocker 85 cooperates with the adjacent extrusion blocks 84 through the inclined groove. An extrusion rod 86 is welded and fixed on the left side of the extrusion blocks 84. The extrusion rod 86 consists of a vertical rod part in the middle and an inclined rod part symmetrically symmetrically up and down. A push rod 87 is welded and fixed on the right side of the belt conveyor 3 front and back.

[0031] Initially, the piston rod of the hydraulic cylinder 32 is in a fully retracted state, that is, the belt conveyor 3 is at the lowest position, the staff starts the electric push rod a73 located at the lowest side, the telescopic rod of the electric push rod a73 retracts, thereby driving the first sealing plate 72 located at the lowest side to move upward, and then opens the opening adjacent to it, the staff then starts the two hydraulic cylinders 32, the piston rods of the two hydraulic cylinders 32 extend synchronously, thereby pushing the belt conveyor 3 to move upward, the unloading plate 61 moves upward with the belt conveyor 3 until it is aligned with the first I-shaped plate 62 located at the lowest side, the two hydraulic cylinders 32 are closed, and when the belt conveyor 3 moves upward, the push rod 87 also moves upward accordingly, thereby contacting and aligning with the inclined rod portion provided at the lower part of the extrusion rod 86 located at the lowest side. It squeezes, causing the squeezing rod 86 to move to the right. Under the guidance of the sliding rod 82 and the fixing seat 81, when the squeezing rod 86 moves to the right, it can only push the squeezing block 84 to move horizontally to the right, thereby driving the rocker 85 to rotate upward with the rotating shaft as the center, and then driving the placement frame 41 located at the lower side to rotate clockwise around the rotating shaft and tilt at a certain angle, so that the placement frame 41 is in a state where the left is higher and the right is lower. At this time, the return spring 83 is compressed, and the placement frame 41 located at the lower side is also aligned with the adjacent first I-shaped plate 62. The staff starts the belt conveyor 3, and the belt conveyor 3 transports the fruits and vegetables to the unloading plate 61. Since the unloading plate 61, the first I-shaped plate 62 and the placement frame 41 are all in a tilted and aligned state, the fruits and vegetables can be smoothly moved along the unloading plate 6 1 and the first I-shaped plate 62 slide into the placement frame 41 and are blocked by the second I-shaped plate 63. When the placement frame 41 is filled with a layer of fruits and vegetables, the belt conveyor 3 is closed, and the electric push rod a73 located at the lowest side is started again. The telescopic rod of the electric push rod a73 extends to push the first sealing plate 72 to reset, and the adjacent openings are closed. The above operation is repeated to fill the remaining two placement frames 41 with fruits and vegetables, and then the hydraulic cylinder 32 is continuously controlled to make the belt conveyor 3 drive the push rod 87 to move upward to a position where it is out of contact with the squeezing rod 86 located at the uppermost side. At this time, the three placement frames 41 are all in a horizontal state, and the freezing chamber 4 is started. The freezing chamber 4 freezes the fruits and vegetables at low temperatures so that the water in the fruits and vegetables exists in the form of ice. After the low-temperature freezing time is sufficient, it is started again. The vacuum pump 5 is started, and the vacuum pump 5 draws the inside of the freezing bin 4 into a vacuum state. The vacuum environment can significantly reduce the boiling point of water, so that ice can directly sublimate into water vapor at a lower temperature. The frozen water on the fruits and vegetables directly sublimates into water vapor, and is then extracted by the vacuum pump 5, so as to achieve the freeze-drying effect on the fruits and vegetables. When the freeze-dried fruits and vegetables need to be taken out, the two electric push rods b77 are started, and the telescopic rods of the two electric push rods b77 are synchronously retracted, thereby driving the two sliding frames 75 to move upward synchronously through the connecting plate 78, thereby causing the three second sealing plates 76 to move upward to open the three openings opened on the right panel of the freezing bin 4, and the staff then starts the hydraulic cylinder 32, and the piston rod of the hydraulic cylinder 32 is retracted, thereby driving the belt conveyor 3 to move downward.As a result, the top rod 87 contacts the uppermost squeezing plate, causing the uppermost placement frame 41 to rotate and tilt. At this time, the fruits and vegetables on it will slide out of the freezing chamber 4 along the second I-shaped plate 63. The staff only needs to collect the freeze-dried fruits and vegetables at the second I-shaped plate 63. Similarly, when the belt conveyor 3 continues to move downward, the fruits and vegetables on the other two placement frames 41 can be collected.

[0032] like Figure 1 and Figure 8 As shown, it also includes a slide rail 91, a mounting plate 92, a mounting seat 93, a bidirectional screw rod 94, a motor 95 and a lever 96. Three slide rails 91 are welded and fixed at intervals from top to bottom on the inner walls of the front and rear panels of the freezing bin 4, and a mounting plate 92 is slidably connected between the two slide rails 91 at the same height. Three mounting seats 93 are welded and fixed at intervals from top to bottom on the inner walls of the left and right panels of the freezing bin 4, and a bidirectional screw rod 94 is rotatably connected between the two mounting seats 93 at the same height. Motors 95 are installed on the three mounting seats 93 on the right side by bolts, and the output shaft ends of the three motors 95 are fixedly connected to the right ends of the adjacent bidirectional screw rods 94. Multiple levers 96 are fixed at intervals on the three mounting plates 92. The lever 96 is made of silicone material, and will not cause damage to the fruits and vegetables when it is moved.

[0033] When the three placement frames 41 are filled with fruits and vegetables and the freezing chamber 4 is started, the staff starts the motor 95 again. The motor 95 drives the bidirectional screw rod 94 to rotate, thereby pushing the mounting plate 92 to make left and right reciprocating motion under the guidance of the slide rail 91, and then drives the lever 96 to move the fruits and vegetables on the placement frames 41, so that each surface of the fruits and vegetables can be more fully in contact with the cold air, thereby enhancing the freezing effect of the moisture in the fruits and vegetables. When the fruits and vegetables need to be taken out of the placement frame 41, since the placement frame 41 is in a state where the left is higher and the right is lower, the distance between the lever 96 and the placement frame 41 becomes larger, thereby not affecting the fruits and vegetables from sliding to the right away from the placement frame 41.

[0034] like Figure 1 and Fig. 9As shown, it also includes a limit plate 101, a fixed block b102, a blocking frame 103, a turntable 104, a torsion spring 105, a column 106, a sleeve 107 and a linkage rod 108. The limit plate 101 is symmetrically welded and fixed on the left side of the freezing bin 4. The limit plate 101 is sequentially provided with three V-shaped parts from top to bottom, and the three V-shaped parts correspond to the three openings provided on the left panel of the freezing bin 4 respectively. The three belt conveyors 3 are symmetrically welded and fixed on the right side of the three belt conveyors 3. The blocking frame 103 is rotatably connected between the two fixed blocks b102. The blocking frame 103 is 3 is composed of a long axis and short axes uniformly arranged thereon, and the short axes are made of flexible material. Turntables 104 are welded and fixed at both ends of the blocking frame 103. Torsion springs 105 are connected between the two turntables 104 and the adjacent fixed blocks b102. Columns 106 are fixedly connected to the side walls of the two turntables 104 away from each other. Sleeves 107 are welded and fixed symmetrically on the right side of the belt conveyor 3. Linkage rods 108 are slidably connected in the two sleeves 107. The right end of the linkage rod 108 contacts the adjacent limit plate 101, and the left end of the linkage rod 108 contacts the adjacent column.

[0035] When the staff drives the hydraulic cylinder 32 to move the belt conveyor 3 upward, the sleeve 107 moves upward with the belt conveyor 3, thereby driving the linkage rod 108 to move upward, so that the linkage rod 108 contacts the inclined surface of the V-shaped part on the limit plate 101, thereby pushing it to the left. The linkage rod 108 moves to the left, and the turntable 104 rotates clockwise by pushing the column 106, thereby driving the blocking frame 103 to rotate clockwise, blocking the right end of the belt conveyor 3, and preventing fruits and vegetables from sliding into the unloading plate 61 due to vibration when the belt conveyor 3 moves upward. Finally, it falls from the right end of the discharge plate 61, causing waste of fruits and vegetables. At this time, the torsion spring 105 is tightened, and when the belt conveyor 3 moves upward to a position to cooperate with the next discharge plate 61, the linkage rod 108 also moves upward to the next V-shaped part on the limit plate 101, and loses the limit of the limit plate 101. The linkage rod 108 can slide to the right. At this time, under the resetting action of the torsion spring 105, the interception frame rotates counterclockwise to reset, thereby releasing the blocking of the right end of the belt conveyor 3, and the fruits and vegetables can be transported to the discharge plate 61 by the belt conveyor 3.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A freeze-drying device for dehydrating and preserving fruits and vegetables, comprising a bottom plate (1), a U-shaped fixing frame (2), a belt conveyor (3), a fixing plate (31), a hydraulic cylinder (32), a freezing chamber (4), a placement frame (41) and a vacuum pump (5), wherein the top left side of the bottom plate (1) is symmetrically fixedly connected to the U-shaped fixing frame (2), the belt conveyor (3) is slidably connected between the two U-shaped fixing frames (2), the fixing plate (31) is fixedly connected to the front and rear sides of the belt conveyor (3), and the top left side of the bottom plate (1) is symmetrically arranged to the front and rear sides. A hydraulic cylinder (32) is installed, and the piston rod ends of the two hydraulic cylinders (32) are respectively fixedly connected to the upper part of the adjacent fixed plate (31). A freezing chamber (4) is arranged on the right side of the top of the bottom plate (1). Three placement frames (41) are connected to the inner walls of the front and rear panels of the freezing chamber (4) in sequence from top to bottom through a rotating shaft. The left and right panels of the freezing chamber (4) are each provided with three openings in a spaced manner from top to bottom, and the three openings correspond to the three placement frames (41) respectively. A vacuum pump (5) is arranged on the top of the freezing chamber (4), characterized in that: It also includes a connecting component (6), a closing component (7) and a tilting mechanism (8); a connecting component (6) for conveying fruits and vegetables is provided between the belt conveyor (3) and the freezing bin (4); closing components (7) for sealing the opening are provided on the left and right sides of the freezing bin (4); and tilting mechanisms (8) for respectively pushing the three placement frames (41) to rotate and tilt are provided on the front and rear sides of the freezing bin (4); The tilting mechanism (8) comprises a fixed seat (81), a slide bar (82), a return spring (83), an extrusion block (84), a rocker (85), an extrusion rod (86) and a push rod (87). The outer walls of the front and rear panels of the freezing chamber (4) are fixedly connected with three pairs of fixed seats (81) at intervals from top to bottom. The fixed seats (81) are slidably connected with slide bars (82). The slide bars (82) and adjacent fixed seats (81) are connected with return springs (83). The left ends of two adjacent slide bars (82) are fixedly connected with an extrusion block (84). The ends of the rotating shafts on the front and rear sides of the three placement frames (41) are fixedly connected with rockers (85). The extrusion blocks (84) are provided with inclined grooves. The rockers (85) cooperate with the adjacent extrusion blocks (84) through the inclined grooves. The left sides of the extrusion blocks (84) are fixedly connected with extrusion rods (86). The right side of the belt conveyor (3) is symmetrically fixedly connected with push rods (87). The extrusion rod (86) is composed of a vertical rod portion in the middle and a vertically symmetrical oblique rod portion.

2. A freeze-drying device for dehydrating and preserving fruits and vegetables according to claim 1, characterized in that: The connecting assembly (6) comprises a blanking plate (61), a first I-shaped plate (62) and a second I-shaped plate (63); the right end of the belt conveyor (3) is fixedly connected to the blanking plate (61); the three openings provided on the left panel of the freezing bin (4) are fixedly connected to the first I-shaped plate (62); and the three openings provided on the right panel of the freezing bin (4) are fixedly connected to the second I-shaped plate (63).

3. A freeze-drying device for dehydrating and preserving fruits and vegetables according to claim 2, characterized in that: The sealing assembly (7) comprises a guide rod (71), a first sealing plate (72), an electric push rod a (73), a fixed block a (74), a sliding frame (75), a second sealing plate (76), an electric push rod b (77) and a connecting plate (78). The outer wall of the left panel of the freezing chamber (4) is fixedly connected to three pairs of guide rods (71) at intervals from top to bottom, and the first sealing plate (72) is slidably connected between each pair of guide rods (71). The outer wall of the left panel of the freezing chamber (4) is installed with three electric push rods a (73) at intervals from top to bottom, and the ends of the telescopic rods of the three electric push rods a (73) are connected to the adjacent first The sealing plate (72) is fixedly connected, four fixed blocks a (74) are fixedly connected at intervals on the outer wall of the right panel of the freezing chamber (4), a sliding frame (75) is slidably connected between two adjacent fixed blocks a (74), and three second sealing plates (76) are fixedly connected at intervals from top to bottom between the two sliding frames (75), two electric push rods b (77) are fixedly connected to the upper side of the outer wall of the right panel of the freezing chamber (4), a connecting plate (78) is fixedly connected between the ends of the telescopic rods of the two electric push rods b (77), and the front and rear ends of the connecting plate (78) are respectively fixedly connected to the two sliding frames (75).

4. A freeze-drying device for dehydrating and preserving fruits and vegetables according to claim 3, characterized in that: The freezer compartment (4) further comprises a slide rail (91), a mounting plate (92), a mounting seat (93), a bidirectional screw rod (94), a motor (95) and a lever (96). Three slide rails (91) are fixedly connected in an interval manner from top to bottom on the inner walls of the front and rear panels of the freezer compartment (4). A mounting plate (92) is slidably connected between two slide rails (91) located at the same height. Three mounting seats (93) are fixedly connected in an interval manner from top to bottom on the inner walls of the left and right panels of the freezer compartment (4). A bidirectional screw rod (94) is rotatably connected between two mounting seats (93) located at the same height. Motors (95) are installed on the three mounting seats (93) located on the right side. The output shaft ends of the three motors (95) are fixedly connected to the right ends of the adjacent bidirectional screw rods (94). A plurality of levers (96) are fixedly connected in an interval manner on the three mounting plates (92).

5. A freeze-drying device for dehydrating and preserving fruits and vegetables according to claim 4, characterized in that: The lever (96) is made of silicone.

6. A freeze-drying device for dehydrating and preserving fruits and vegetables according to claim 5, characterized in that: It also includes a limit plate (101), a fixed block b (102), a blocking frame (103), a rotating disk (104), a torsion spring (105), a column (106), a sleeve (107) and a linkage rod (108); the left side of the freezing warehouse (4) is symmetrically fixedly connected to the limit plate (101); the right side of the belt conveyor (3) is symmetrically fixedly connected to the fixed block b (102); the blocking frame (103) is rotatably connected between the two fixed blocks b (102); the front and rear ends of the blocking frame (103) are both fixedly connected to the rotating disk (104); the two rotating disks (104) and the adjacent fixed blocks b (102) are both connected to torsion springs (105); the side walls of the two rotating disks (104) that are away from each other are both fixedly connected to the columns (106); the right side of the belt conveyor (3) is symmetrically fixedly connected to the sleeve (107); the two sleeves (107) are both slidably connected to the linkage rod (108).

7. A freeze-drying device for dehydrating and preserving fruits and vegetables according to claim 6, characterized in that: The blocking frame (103) consists of a long axis and short axes evenly arranged thereon, wherein the short axes are made of flexible materials.

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