Freeze dryer for fruit product processing

Abstract

The invention belongs to the technical field of fruit product freeze-drying, and particularly relates to a freeze dryer for fruit product processing, which comprises a box body, the upper wall of the box body is provided with a feed inlet, the interior of the box body is rotatably connected with a hollow rotating rod, the hollow rotating rod is fixedly connected with a plurality of storage cages, and the inner wall of the box body is provided with a motor. An output shaft of the motor is fixedly connected with a driving rod, the driving rod and the hollow rotating rod are each provided with a first gear, and the two first gears are meshed with each other; and the deicing assembly is used for intensively conveying ice slag in one direction so as to improve the deicing effect. By arranging the deicing assembly, the piston cylinder can move front and back, and the piston block in the piston cylinder can move up and down, so that the grating scraping plate can do the action similar to sweeping, the scraping plate is prevented from making contact with an icing surface all the time, and a thin ice layer on the icing surface is effectively removed.

Description

Technical Field

[0001] The invention belongs to the technical field of freeze-drying of fruit products, and in particular relates to a freeze-drying machine for processing fruit products. Background Art

[0002] During the production and processing of fruit products, freeze dryers can be used to freeze-dry fruit products. That is, through advanced freezing and vacuum drying technology, the shelf life, eating convenience and nutritional quality of fruit products can be significantly improved.

[0003] When freeze-drying a product, it generally includes three stages: freezing, sublimation and re-drying. After the traditional freeze-drying equipment freezes the product, during the process of heating and drying it, the solid ice condensed inside the fruit product vaporizes into gaseous water vapor. The water vapor adheres to the bottom or side wall of the equipment's inner cavity (the inner cavity wall close to the condenser) where the temperature is lower, and gradually forms an ice layer. The ice layer covers the inner cavity wall of the equipment, making it difficult for the low temperature generated by the condenser to penetrate the ice layer and conduct to the inside of the equipment. As a result, before freeze-drying the next batch of fruit products, it takes time to observe and clean the ice layer covering the inner cavity of the equipment. For freeze dryers with condensing tubes arranged at the bottom, the traditional de-icing method is to use a motor to drive the scraper to move back and forth for de-icing. However, in this de-icing method, the scraper is always in contact with the ice surface, and the ice debris scraped off the ice surface cannot be transported and concentrated in one direction. Not only is the de-icing effect greatly limited, but the ice debris is concentrated together. If it is not removed from the ice surface in time, it is easy to form larger ice blocks during the freezing process of the next batch of products, affecting the subsequent freeze-drying process of the products. In addition, during the re-drying stage of the product, when heating the fruit products, traditional electric heating wires are used for heating. However, due to the near vacuum inside the de-icing machine and the lack of heat conduction medium, the heat emitted by the heating wire can only be transferred to the fruit products by thermal radiation. This method heats the fruit products slowly, and is affected by the position layout of the heating elements, and the uniformity of heating the fruit products is difficult to guarantee. Summary of the invention

[0004] The purpose of the present invention is to provide a freeze dryer for fruit products that can make the grid scraper perform a sweeping action to avoid the scraper always being in contact with the frozen surface and making it impossible to scrape off the ice debris, thereby effectively removing the thin ice layer on the frozen surface.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A freeze dryer for processing fruit products, comprising a box, an upper wall of the box is provided with a feed port, a hollow rotating rod is rotatably connected inside the box, a plurality of storage cages are fixedly connected to the hollow rotating rod, a motor is installed on the inner wall of the box, an output shaft of the motor is coaxially fixedly connected to a driving rod, a first gear is coaxially fixed to both the driving rod and the hollow rotating rod, and the two first gears are meshed with each other;

[0007] A de-icing assembly, which is used to transport ice debris in one direction to improve the de-icing effect. The de-icing assembly includes a transmission rod rotatably connected to the inner wall of the box body, the transmission rod is transmission-connected to the hollow rotating rod, the interior of the box body is slidingly connected to a piston cylinder, the inner wall of the piston cylinder is sealingly and slidingly connected to a piston block, the part of the transmission rod extending into the piston cylinder is fixedly connected to a second gear, the middle part of the piston block is provided with a tooth groove meshing with the second gear, the bottom end of the piston block is fixedly connected to an extension rod, the part of the extension rod extending below the piston cylinder is connected to a grille scraper, the inner wall of the box body is fixedly connected to a slide rail, and the side wall of the extension rod is rotatably connected to a roller that cooperates with the slide rail.

[0008] Preferably, each of the peripheral side walls of the plurality of storage cages is provided with a material placement opening, and a closed door is hingedly connected to the material placement opening.

[0009] Preferably, both the transmission rod and the hollow rotating rod are provided with synchronous wheels, and a synchronous belt is sleeved between the two synchronous wheels.

[0010] Preferably, the slide rail comprises a straight section and two semicircular sections, the two semicircular sections are connected to two ends of the straight section, and when the roller rolls one circle along the slide rail, the second gear also rolls one circle along the tooth groove.

[0011] Preferably, a guide rod is provided inside the box body, the guide rod is arranged horizontally, and two ends of the guide rod are respectively fixed to two side walls opposite to the box body, and the piston cylinder is slidably connected to the lower end of the guide rod.

[0012] Preferably, it also includes a heating component, which is used to provide the required heat for the sublimation of ice crystals in the fruit product. The heating component includes a heating box fixedly connected to the outer wall of the box body, an oil inlet pipe is provided at the upper end of the heating box, the oil inlet pipe is sealingly and rotatably connected to one end of the hollow rotating rod, and the heating box is connected to the interior of the hollow rotating rod through the oil inlet pipe, an oil outlet pipe is provided on the side wall of the heating box, the oil outlet pipe extends to the part of the piston cylinder located above the piston block, the end of the piston cylinder away from the oil outlet pipe is penetrated and sealed by an oil delivery pipe, the oil delivery pipe is sealingly and rotatably connected to the other end of the hollow rotating rod, and the piston cylinder is connected to the interior of the hollow rotating rod through the oil delivery pipe.

[0013] Preferably, the heating box and the hollow rotating rod are filled with silicone oil, an opening is provided on the heating box, and the opening is sealed by an elastic rubber sheet.

[0014] Preferably, the ends of the oil outlet pipe and the oil delivery pipe close to the piston cylinder are both configured as hoses, and a one-way valve is provided inside the hoses. The piston cylinder is configured as a flat column, and a vent hole is provided at its lower end.

[0015] Compared with the existing technology, the advantages of the freeze dryer for fruit product processing are:

[0016] 1. The present invention sets an ice-removing assembly. During freeze-drying, the motor drives the driving rod to rotate, and the two first gears drive the hollow rotating rod to rotate. The hollow rotating rod drives the transmission rod to rotate, and the second gear on the transmission rod rotates. The slide rail on the inner wall of the box body and the roller on the piston block cooperate therewith make the piston cylinder move back and forth and the piston block move up and down alternately, so that the grid scraper can perform a sweeping action, avoiding the scraper from always contacting the ice surface and making it impossible to scrape off the ice residue, and effectively removing the thin ice layer on the ice surface. Compared with setting a scraper that can only move back and forth, the present application can not only scrape the ice residue, but also scrape the ice residue in more than one direction to concentrate it, so as to avoid the ice residue from forming larger ice cubes near the condenser during the freezing process of the next batch of products.

[0017] 2. The present invention arranges a hollow rotating rod and a storage cage, and utilizes silicone oil as a heat transfer medium. The heat capacity of the silicone oil is large, and the temperature fluctuation can be buffered to a certain extent, thereby maintaining temperature stability. The heat of the silicone oil is transferred to the storage cage by heat conduction through a plurality of storage cages arranged on the hollow rotating rod, and then conducted to the fruit product by the storage cage. Compared with traditional thermal radiation heating, the fruit product can directly contact the storage cage for heat conduction, so that the heating speed is faster. In addition, during the rotation of the storage cage, the fruit product is in contact with different surfaces of the fruit product, so that the fruit product is evenly heated, avoiding uneven heating and affecting the sublimation speed.

[0018] 3. The present invention sets a heating component. When the motor drives the hollow rotating rod to rotate, and at the same time drives the transmission rod and the second gear to rotate, the piston block in the piston cylinder moves up and down to form a suction pump structure. When the piston block moves up, the silicone oil in the heating box can be drawn into the piston cylinder. When the piston block moves down, the silicone oil in the piston cylinder can be pumped into the hollow rotating rod. The hollow rotating rod conducts the heat of the silicone oil to the storage cage to heat and raise the temperature of the material. The silicone oil flows through the hollow rotating rod and flows back to the interior of the heating box under the action of the negative pressure in the heating box to supplement the heat for the silicone oil, thereby realizing cyclic conduction heating and ensuring the continuous supply of heat. The heating method has high speed and high controllability of the heating temperature, which further improves the heating effect of the fruit product.

[0019] 4. The present application uses a motor as a power source, which can simultaneously drive the storage cage to rotate, the grille scraper to de-ice, and the silicone oil to circulate and heat, thereby simplifying the product structure and ensuring the freeze-drying effect of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a freeze dryer for processing fruit products provided by the present invention;

[0021] Figure 2 It is a cross-sectional view of a freeze dryer for processing fruit products provided by the present invention;

[0022] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 yes Figure 2 The enlarged view of point B in the middle;

[0024] Figure 5 The present invention is a cross-sectional view of a piston cylinder in a freeze dryer for processing fruit products.

[0025] In the figure, 1. box body; 11. feed port; 12. hollow rotating rod; 13. storage cage; 14. motor; 15. driving rod; 16. first gear; 2. de-icing assembly; 21. transmission rod; 22. piston cylinder; 23. piston block; 24. second gear; 25. tooth groove; 26. extension rod; 27. grille scraper; 28. slide rail; 29. ​​roller; 3. synchronous wheel; 4. synchronous belt; 5. heating assembly; 51. heating box; 52. oil inlet pipe; 53. oil outlet pipe; 54. oil pipeline. DETAILED DESCRIPTION

[0026] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0027] Example: Refer to Figures 1 to 5 A freeze dryer for processing fruit products, comprising a box body 1, a feed inlet 11 is provided on the upper wall of the box body 1, a sealing cover is provided at the feed inlet 11, a hollow rotating rod 12 is rotatably connected inside the box body 1, a plurality of storage cages 13 are fixedly connected to the hollow rotating rod 12, a motor 14 is installed on the inner wall of the box body 1, a driving rod 15 is coaxially fixedly connected to the output shaft of the motor 14, a first gear 16 is coaxially fixed to both the driving rod 15 and the hollow rotating rod 12, and the two first gears 16 are meshed with each other;

[0028] Among them, a condensing coil (not marked in the figure) is provided inside the bottom wall of the box 1, and the condensing coil is connected to the refrigeration system of the freeze dryer. The inside of the box 1 can be cooled through the condensing coil. The refrigeration system is consistent with that of a traditional freeze dryer and will not be explained here.

[0029] Among them, the peripheral side walls of the plurality of storage cages 13 are all provided with material placement openings, and closed doors (not shown in the figure) are hinged at the material placement openings, and materials are placed through the placement openings, and the closed doors are closed and locked after placement.

[0030] In view of the problem that in the prior art, when fruit products are heated after freeze-drying, traditional electric heating wires are used for heating. However, since the de-icing machine is close to vacuum and lacks heat conduction medium, the heat emitted by the electric heating wire can only be transferred to the fruit products by thermal radiation. This method heats slowly and is affected by the layout of the heating elements, resulting in uneven heating effect. The present invention provides a hollow rotating rod 12 and a storage cage 13. After freeze-drying, silicone oil is used as a heat transfer medium. The heat capacity of the silicone oil is large and the temperature fluctuation can be buffered to a certain extent, thereby maintaining temperature stability. The heat of the silicone oil is transferred to the storage cage 13 by a plurality of storage cages 13 provided on the hollow rotating rod 12. Compared with the thermal radiation heating of the traditional heating wire and the electric heating tube, the fruit products can directly contact the storage cage 13 for heat conduction, thereby making the heating speed faster. During the rotation of the storage cage 13, the storage cage 13 contacts different surfaces of the fruit products, thereby evenly heating the fruit products and avoiding uneven heating and affecting the sublimation speed.

[0031] The de-icing assembly 2 is used to transport ice debris in one direction to improve the de-icing effect. The de-icing assembly 2 includes a transmission rod 21 rotatably connected to the inner wall of the box body 1, a piston cylinder 22 is slidably connected inside the box body 1, and a piston block 23 is sealingly and slidably connected to the inner wall of the piston cylinder 22. The part of the transmission rod 21 extending into the piston cylinder 22 is fixedly connected to the second gear 24, and the middle part of the piston block 23 is provided with a tooth groove 25 meshing with the second gear 24. The bottom end of the piston block 23 is fixedly connected to an extension rod 26, and the part of the extension rod 26 extending below the piston cylinder 22 is fixedly connected to a grille scraper 27. A slide rail 28 is fixedly connected to the inner wall of the box body 1, and the slide rail 28 is horizontally arranged. The side wall of the extension rod 26 is provided with a roller 29 that cooperates with the slide rail 28.

[0032] Among them, both the transmission rod 21 and the hollow rotating rod 12 are provided with a synchronous wheel 3, and a synchronous belt 4 is sleeved between the two synchronous wheels 3. Therefore, when the motor 14 drives the hollow rotating rod 12 to rotate, the hollow rotating rod 12 can drive the transmission rod 21 to rotate with the synchronous belt 4, so that the second gear 24 in the piston cylinder 22 can rotate continuously, so that the ice debris can be scraped off without setting an additional driving source.

[0033] The slide rail 28 includes a straight section and two semicircular sections, and the two semicircular sections are connected to the two ends of the straight section. The roller 29 rolls along the slide rail 28 for one circle, and the second gear 24 also rolls along the tooth groove 25 for one circle. Therefore, the piston block 23 in the piston cylinder 22 can always move along a predetermined track through the continuous movement of the roller 29 and the slide rail 28. When the roller 29 rolls along the straight section of the slide rail 28, the second gear 24 also meshes along the straight section of the tooth groove 25. Since the second gear 24 is rotatably connected to the inner wall of the box body 1 through the transmission rod 21, it can only rotate. The rotation drives the piston block 23 to move horizontally, and then drives the piston cylinder 22 to move in the horizontal direction. When the roller 29 rolls along the semicircular segment of the slide rail 28, the second gear 24 also engages along the semicircular segment of the tooth groove 25. Since the movement trajectory of the roller 29 is a semicircular arc, it can drive the piston cylinder 22 to move slightly in the horizontal direction while driving the piston block 23 to move in the vertical direction. The piston block 23 drives the grille scraper 27 to move up and down synchronously through the extension rod 26. When the roller 29 rolls one circle along the slide rail 28, the corresponding grille scraper 27 can achieve an action similar to sweeping the floor.

[0034] Among them, a guide rod is provided inside the box body 1, and the piston cylinder 22 is slidably connected to the lower end of the guide rod, ensuring that the piston block 23 can drive the piston cylinder 22 to move horizontally, but the piston block 23 can move vertically relative to the piston cylinder 22.

[0035] Specifically, the scraping strips of the grille scraper 27 should be arranged perpendicular to the direction of its horizontal displacement to scrape off the ice layer. At the same time, the extension rod 26 can be elastically connected to the grille scraper 27 through a spring to avoid friction loss caused by long-term contact between the grille scraper 27 and the ice surface, thereby extending its maintenance period.

[0036] In view of the problem that the traditional deicing method in the prior art needs to set up additional driving components, when using a scraper to de-ice, the scraper moves back and forth, and it is always in contact with the ice surface, and the ice debris on the ice surface cannot be transported and concentrated in one direction. The scraped ice debris is concentrated together and easily forms larger ice cubes, which greatly limits the deicing effect. The present invention sets a deicing component 2. In the material heating stage, the motor 14 drives the driving rod 15 to rotate, and the two first gears 16 drive the hollow rotating rod 12 to rotate. The hollow rotating rod 12 drives the storage cage 13 thereon to rotate, so that the fruit products in the storage cage 13 are quickly and evenly cooled. At the same time, the hollow rotating rod 12 will drive the transmission through the synchronous wheel 3 and the synchronous belt 4. The rod 21 rotates, and the second gear 24 on the transmission rod 21 rotates. Through the mutual cooperation between the second gear 24 and the tooth groove 25 on the piston block 23, and the restriction of the movement trajectory by the slide rail 28, the grille scraper 27 can be driven to perform horizontal displacement to complete the action of scraping the ice layer, and can also lift itself up and not contact the ice surface during the return process, passing over the scraped ice debris to avoid bringing the ice debris back; at the beginning of the scraping action of the next cycle, and because the ice debris scraped in the previous cycle has a certain movement inertia, the ice debris will move a distance in the opposite direction of the scraping, and can be pushed by the grille scraper 27 in one direction, and finally the scraped ice debris will be pushed out of the coverage of the condensing coil to avoid affecting the refrigeration effect of the condensing coil on the cabinet 1.

[0037] The present invention also includes a heating assembly 5, which is used to provide the required heat for the sublimation of ice crystals in the fruit product. The heating assembly 5 includes a heating box 51 fixedly connected to the outer wall of the box body 1. An electric heating element with adjustable power is arranged in the heating box 51, and a suitable heating temperature can be set according to the heating requirements of different materials. An oil inlet pipe 52 is arranged at the upper end of the heating box 51. The oil inlet pipe 52 is sealed and rotatably connected to one end of the hollow rotating rod 12, and the heating box 51 is connected to the inside of the hollow rotating rod 12 through the oil inlet pipe 52. An oil outlet pipe 53 is arranged on the side wall of the heating box 51. The oil outlet pipe 53 extends to the part of the piston cylinder 22 located above the piston block 23. The end of the piston cylinder 22 away from the oil outlet pipe 53 is penetrated and sealedly connected with an oil delivery pipe 54. The oil delivery pipe 54 is sealed and rotatably connected to the other end of the hollow rotating rod 12, and the piston cylinder 22 is connected to the inside of the hollow rotating rod 12 through the oil delivery pipe 54.

[0038] Among them, the heating box 51 and the hollow rotating rod 12 are filled with silicone oil, and the oil outlet pipe 53 and the oil delivery pipe 54 are both set as hoses at one end near the piston cylinder 22. The hose is selected to be a low-temperature resistant hose. The setting of the hose can avoid affecting the movement of the piston cylinder 22, and a one-way valve is provided inside the hose. The piston cylinder 22 is set to be a flat column, and a vent is provided at its lower end. Through the setting of the one-way valve, when the piston block 23 is displaced downward relative to the piston cylinder 22, the silicone oil in the heating box 51 can only be transported to the inside of the piston cylinder 22 through the oil outlet pipe 53. When the piston block 23 is displaced upward relative to the piston cylinder 22, the silicone oil in the piston cylinder 22 can only be pumped to the inside of the hollow rotating rod 12 through the oil delivery pipe 54. It is worth mentioning that an opening is provided on the heating box 51, and the opening is sealed by an elastic rubber sheet. The function of the elastic rubber sheet is similar to that of a breathing diaphragm, so that the volume of the heating box 51 can be changed, ensuring that the silicone oil can circulate normally in the heating component.

[0039] In order to further improve the heating effect of the fruit products, the present invention sets a heating component 5. When the motor 14 drives the hollow rotating rod 12 to rotate, and at the same time drives the transmission rod 21 and the second gear 24 to rotate, the piston block 23 in the piston cylinder 22 moves up and down to form a suction pump structure. When the piston block 23 moves up, the silicone oil in the heating box 51 can be drawn into the piston cylinder 22. When the piston block 23 moves down, the silicone oil in the piston cylinder 22 can be pumped into the hollow rotating rod 12. The hollow rotating rod 12 conducts the heat of the silicone oil to the storage cage 13 to heat and raise the temperature of the material. The silicone oil flows through the hollow rotating rod 12 and, under the action of the negative pressure in the heating box 51, flows back to the inside thereof to supplement the heat for the silicone oil, thereby realizing cyclic conduction heating, and further improving the heating effect of the fruit products.

[0040] The present invention can be explained by the following operation mode:

[0041] After the material is frozen, the vacuum drying heating stage begins. The motor 14 drives the driving rod 15 to rotate, and the two first gears 16 drive the hollow rotating rod 12 to rotate. The hollow rotating rod 12 drives the storage cage 13 thereon to rotate, and the fruit products in the storage cage 13 are evenly cooled. At the same time, the hollow rotating rod 12 drives the transmission rod 21 to rotate through the synchronous wheel 3 and the synchronous belt 4, and the second gear 24 on the transmission rod 21 rotates. Through the mutual cooperation of the second gear 24 and the tooth groove 25 on the piston block 23, the piston cylinder 22 moves forward and backward while the piston block 23 inside it moves up and down, so that the grille scraper 27 can perform a sweeping action, so as to avoid the grille scraper 27 always contacting the ice surface and making it impossible to scrape off the ice residue, and effectively remove the thin ice layer on the ice surface;

[0042] After freeze drying, silicone oil is used as a heat transfer medium. It has a large heat capacity and can buffer temperature fluctuations to a certain extent, thereby maintaining temperature stability. The heat of the silicone oil is transferred to the storage cages 13 through a plurality of storage cages 13 arranged on the hollow rotating rod 12. Compared with traditional thermal radiation heating, the fruit product can directly contact the storage cages 13 for heat conduction, making the heat conduction speed faster. During the rotation of the storage cages 13, they contact different surfaces of the fruit product, and the fruit product is evenly heated.

[0043] While the second gear 24 rotates, the piston block 23 in the piston cylinder 22 moves up and down to form a suction pump structure. When the piston block 23 moves up, the silicone oil in the heating box 51 can be drawn into the piston cylinder 22. When the piston block 23 moves down, the silicone oil in the piston cylinder 22 can be pumped into the hollow rotating rod 12. The hollow rotating rod 12 conducts the heat of the silicone oil to the storage cage 13 to heat the material. The silicone oil flows through the hollow rotating rod 12 and, under the action of the negative pressure in the heating box 51, flows back into the interior thereof to replenish heat for the silicone oil, thereby realizing cyclic conductive heating.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A freeze dryer for processing fruit products, comprising a housing (1), characterized in that: The upper wall of the box body (1) is provided with a feed port (11), the interior of the box body (1) is rotatably connected to a hollow rotating rod (12), a plurality of storage cages (13) are fixedly connected to the hollow rotating rod (12), a motor (14) is installed on the inner wall of the box body (1), the output shaft of the motor (14) is coaxially fixedly connected to a driving rod (15), the driving rod (15) and the hollow rotating rod (12) are coaxially fixed with a first gear (16), and the two first gears (16) are meshed with each other; A deicing assembly (2), the deicing assembly (2) is used to centrally transport ice debris in one direction to improve the deicing effect, the deicing assembly (2) comprises a transmission rod (21) rotatably connected to the inner wall of a box body (1), the transmission rod (21) is transmission-connected to a hollow rotating rod (12), the interior of the box body (1) is slidably connected to a piston cylinder (22), the inner wall of the piston cylinder (22) is sealingly slidably connected to a piston block (23), and the transmission rod (21) extends to a portion of the piston cylinder (22) A second gear (24) is fixedly connected to the box body (1); a tooth groove (25) meshing with the second gear (24) is provided in the middle of the piston block (23); an extension rod (26) is fixedly connected to the bottom end of the piston block (23); a grille scraper (27) is connected to the portion of the extension rod (26) extending below the piston cylinder (22); a slide rail (28) is fixedly connected to the inner wall of the box body (1); and a roller (29) cooperating with the slide rail (28) is rotatably connected to the side wall of the extension rod (26).

2. The freeze dryer for processing fruit products according to claim 1, characterized in that: The peripheral side walls of the plurality of storage cages (13) are all provided with material placement openings, and closed doors are hingedly connected to the material placement openings.

3. The freeze dryer for processing fruit products according to claim 1, characterized in that: The transmission rod (21) and the hollow rotating rod (12) are both provided with synchronous wheels (3), and a synchronous belt (4) is sleeved between the two synchronous wheels (3).

4. The freeze dryer for processing fruit products according to claim 1, characterized in that: The slide rail (28) comprises a straight section and two semicircular sections, the two semicircular sections are connected to the two ends of the straight section, the roller (29) rolls one circle along the slide rail (28), and the second gear (24) also rolls one circle along the tooth groove (25).

5. The freeze dryer for processing fruit products according to claim 1, characterized in that: A guide rod is provided inside the box body (1). The guide rod is arranged horizontally, and its two ends are respectively fixed to two opposite side walls of the box body (1). The piston cylinder (22) is slidably connected to the lower end of the guide rod.

6. The freeze dryer for processing fruit products according to claim 1, characterized in that: The invention also comprises a heating assembly (5), wherein the heating assembly (5) is used to provide the heat required for the sublimation of ice crystals in the fruit product, and the heating assembly (5) comprises a heating box (51) fixedly connected to the outer wall of the box body (1), an oil inlet pipe (52) is provided at the upper end of the heating box (51), the oil inlet pipe (52) is sealingly rotatably connected to one end of the hollow rotating rod (12), and the heating box (51) is connected to the inside of the hollow rotating rod (12) through the oil inlet pipe (52). An oil outlet pipe (53) is provided on the side wall of the heating box (51), and the oil outlet pipe (53) extends to the portion of the piston cylinder (22) located above the piston block (23). An end of the piston cylinder (22) away from the oil outlet pipe (53) is penetrated and sealed with an oil delivery pipe (54), and the oil delivery pipe (54) is sealed and rotatably connected to the other end of the hollow rotating rod (12), and the piston cylinder (22) is connected to the inside of the hollow rotating rod (12) through the oil delivery pipe (54).

7. The freeze dryer for processing fruit products according to claim 6, characterized in that: The heating box (51) and the hollow rotating rod (12) are filled with silicone oil. An opening is provided on the heating box (51), and the opening is sealed by an elastic rubber sheet.

8. The freeze dryer for processing fruit products according to claim 7, characterized in that: The ends of the oil outlet pipe (53) and the oil delivery pipe (54) close to the piston cylinder (22) are both configured as hoses, and a one-way valve is provided inside the hoses. The piston cylinder (22) is configured as a flat column, and a vent hole is provided at its lower end.

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