Fresh-keeping processing device for winter jujube fruits

Abstract

The invention discloses a winter jujube fruit fresh-keeping processing device, and belongs to the technical field of fruit fresh-keeping processing. The device is composed of a freeze-drying structure and a cold trap structure, the freeze-drying structure integrates quick freezing and freeze-drying functions, and the cold trap structure is connected with a vacuum system; during working, pretreated winter jujubes are placed on a specific storage plate frame and are quickly frozen in a quick-freezing bin of a freeze-drying structure, meanwhile, the internal special structure drives a liquid material to circulate to assist ice crystallization, ice crystals push the storage plate frame to enter the freeze-drying bin, automatic connection from quick freezing to freeze-drying is achieved, and after the winter jujubes enter the freeze-drying bin, related parts are matched to start vacuum and other systems, and the winter jujubes are quickly frozen. Performing freeze-drying and fresh-keeping processing on the winter jujubes; the device avoids loss of transfer cold energy, guarantees freeze-drying quality of winter jujubes, optimizes early-stage preparation of freeze-drying, improves fresh-keeping processing efficiency, and can also automatically clean ice crystals and adherends, prolong the service life of equipment and reduce maintenance cost.

Description

Technical Field

[0001] The invention relates to the technical field of fruit preservation and processing, in particular to a winter jujube fruit preservation and processing device. Background Art

[0002] Winter jujube, as a fruit with a crispy taste, high sweetness and rich in various vitamins and minerals, is deeply loved by consumers. However, the preservation of winter jujube has always been a major problem that has troubled fruit farmers and the fruit industry. It has a high water content and a vigorous metabolism. It is very easy to lose water, shrink, rot and deteriorate at room temperature. Even under refrigerated conditions, the shelf life is relatively short. Traditional preservation methods such as refrigeration and controlled atmosphere preservation can extend the shelf life of winter jujube to a certain extent, but it is difficult to fundamentally solve the problem of its quality decline. With the increasing demand for high-quality fruits and the trend of large-scale and global development of the fruit industry, it is urgent to develop an efficient preservation technology that can maintain the original quality of winter jujube to the greatest extent. Freeze-drying preservation technology, with its advantages of drying at low temperature, can effectively reduce the loss of heat-sensitive components and retain the nutrition and flavor of fruits to the greatest extent. It provides a new solution for the preservation of winter jujube and has become a hot topic in the field of fruit preservation.

[0003] Currently, when freeze-drying winter jujubes, fresh winter jujubes are first pre-treated, washed, pitted, etc. to ensure uniform quality. Then the processed winter jujubes are quickly placed in a low-temperature environment to freeze their internal moisture into ice to form a solid ice crystal structure. Subsequently, the winter jujubes are heated under a vacuum state, and the ice directly sublimates into water vapor and separates from the winter jujubes, thereby achieving dehydration and drying. The entire process is carried out at a low temperature, which can effectively avoid the loss of nutrients in the winter jujube due to high temperature, retain its flavor, color and nutrition to the greatest extent, and finally obtain a freeze-dried winter jujube product that can be stored for a long time.

[0004] However, the current energy-saving winter jujube freeze-drying equipment generally needs to use transfer equipment to quickly transfer the quick-frozen winter jujube after freezing the winter jujube in the direction of the ice crystal structure in the quick-freezing warehouse, so that it can be quickly delivered to the freeze-drying equipment for dehydration and drying operations. During this transportation time, the cold amount of the winter jujube will be lost, which is likely to affect the ice crystal state of the outer layer of the winter jujube, thereby affecting the quality of the winter jujube after freeze-drying.

[0005] Therefore, a winter jujube fruit fresh-keeping and processing device is proposed. Summary of the invention

[0006] The object of the present invention is to provide a winter jujube fruit preservation and processing device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a winter jujube fruit preservation and processing device, comprising:

[0008] The freeze-dried structure is divided into two parts, the front part has the ability of quick freezing, and the back part has the ability of vacuum low-temperature heating;

[0009] The cold trap structure is airtightly connected to the rear end of the freeze-drying structure by bolts and is connected to the filter and the vacuum system;

[0010] The freeze-drying structure includes a quick-freezing chamber, the rear end of which is connected to the freeze-drying chamber by bolts, and the inner walls of the quick-freezing chamber and the freeze-drying chamber are both provided with heat exchange plates for heat exchange;

[0011] Among them, a winter jujube pulp pipe chamber for cooperating with the heat exchange plate and the inside of the quick freezing bin is provided at a specified interval below the inner part of the quick freezing bin wall, and the rear end of the winter jujube pulp pipe chamber is openly provided through the quick freezing bin, and guide rails are fixedly provided on the left and right sides of the heat exchange plate below the inner wall of the quick freezing bin, and the guide rails are slidably connected with the winter jujube storage plate rack, and the front and rear ends of the winter jujube storage plate rack are integrally fixed with airtight door panels, and an arched passive slider is fixedly provided below the side of the airtight door panel located at the rear side of the winter jujube storage plate rack, and the surface of the airtight door panel is symmetrically provided with rectangular airtight docking slots along the diameter;

[0012] A heating plate group is fixedly installed on the rear wall inside the freeze-drying chamber corresponding to the airtight docking slot, and an airtight plate head for sliding sealing is fixedly arranged on the front side of the heating plate group;

[0013] The winter jujube pulp tube chamber and the limiting slide are internally provided with a spiral rod for rotation. After part of the rod body of the spiral rod passes through the winter jujube pulp tube chamber, it enters the limiting slide through the through hole opened on the surface of the passive slider, and extends straightly along the limiting slide to pass through the freeze-drying bin, and is connected to the driving motor through the coupling after passing through the cold trap structure. The front and rear sides of the passive slider are provided with a high-insulation telescopic tube on the rod body of the spiral rod, and one end of the two high-insulation telescopic tubes is respectively fixed on the rear wall of the freeze-drying bin and the port position of the winter jujube pulp tube chamber, and the interior of the rear high-insulation telescopic tube is fixed with at least one pulp flow tube and at least one check valve on the rear wall surface of the extending part of the limiting slide, wherein the check valve is connected to a reflux fluid channel opened at the lower part of the freeze-drying bin, and the output end of the reflux fluid channel is connected to the front end of the winter jujube pulp tube chamber.

[0014] Preferably, the inner radius of the quick-freezing bin is larger than the inner radius of the freeze-drying bin, the length of the quick-freezing bin is smaller than the length of the freeze-drying bin, the bottom surface of the winter jujube storage plate rack is integrally provided with a limiting slide for sliding in cooperation with a guide rail, and the surface of the airtight door panel is provided with an arched open groove corresponding to the limiting slide to allow the heat exchange plate to slide through.

[0015] Preferably, the sealing rings of the two airtight door panels are arranged near the rear side, and the outer radius of the airtight door panels is smaller than the inner radius of the quick freezing chamber and equal to the inner radius of the freeze drying chamber, and the front end of the airtight door panel located on the front side has a baffle with a radius greater than the inner radius of the freeze drying chamber and less than or equal to the inner radius of the quick freezing chamber.

[0016] Preferably, an arc-shaped lower sealing plate is fixedly arranged between two airtight door panels directly below the winter jujube storage plate rack, and the lower sealing plate covers the upper port of the limiting slide groove opened directly below the freeze-drying bin after being moved into the freeze-drying bin along with the winter jujube storage plate rack.

[0017] Preferably, the interior of the heating plate group is equipped with an electric heating module, and after sliding parallel and sealingly docking with the winter jujube storage plate rack, it is located directly below each layer of the winter jujube storage plate rack, and does not contact the winter jujube fruits evenly placed on the surface of the winter jujube storage plate rack.

[0018] Preferably, the length of the limiting slide groove is equal to the sum of the lengths of the winter jujube storage plate rack and the two airtight door panels, and the length of the limiting slide groove is less than the length of the freeze-drying chamber.

[0019] Preferably, the slurry flow pipe and the check valve are distributed in a ring shape along the axis, and are spaced apart from each other, wherein a slurry outlet is provided on the side of the slurry flow pipe near the check valve, and a filter pipe head is integrally connected to the front end of the slurry flow pipe after passing through the passive slider and at a position near the screw rod and the screw belt.

[0020] Preferably, a resistance spring is sleeved on the rod body of the bare rod part of the screw rod, and the front end of the resistance spring is fixed to the passive slider, and the rear end of the resistance spring is fixed on the inner wall of the spring connecting ring groove opened between the screw rod and the slurry flow tube inside the freeze-drying bin, the winter jujube pulp tube chamber and the high heat-resistant insulation telescopic tube store winter jujube pulp or liquid materials with similar properties to winter jujube, the passive slider is in a sliding and sealed connection with the screw rod and the slurry flow tube, after the winter jujube storage plate rack is moved into the freeze-drying bin, the baffle of the airtight door panel located on the front side will push the push control switch to open, the push control switch is fixedly arranged in the isolation mounting groove opened at the front port of the freeze-drying bin, and is electrically connected to the freeze-drying bin control system through a line, thereby controlling the operation of the vacuum system.

[0021] Preferably, the cold trap structure includes an end body, a flange ring is provided at the rear port of the end body, and the flange ring cooperates with bolts to be connected with a flange ring integrally arranged at the rear port of the freeze-drying bin behind a clamping gasket, a vacuum connection interface is provided at the center position of the rear surface of the end body, and the vacuum connection interface is connected to the filter and the vacuum pump system through bolts, a cold trap space is provided inside the end body, and the cold trap space cooperates with heat exchange plates fixed along an axial ring array on the inner wall of one side close to the freeze-drying bin to capture ice, a plurality of through holes are provided on the surface of the sealing plate that isolates the end body from the freeze-drying bin, and a check valve is installed inside the through hole A scraper is provided inside the cold trap space of the end body for sliding along the surface path of the heat exchange plate on the side close to the freeze-drying bin, a push rod is fixedly provided on the scraper facing the center position of the freeze-drying bin plate surface, and the push rod is inserted into the interior of the freeze-drying bin through a through hole opened on the surface of the sealing plate for sliding sealing, a return spring is fixedly provided on the surface of the scraper facing the vacuum connection interface, and one end of the return spring is fixed on the inner wall of the cold trap space of the end body, a drain groove is provided at the lower part of the interior of the end body, which is open from the rear side of the heat exchange plate to the outside, and the drain groove is arranged obliquely toward the rear and downward, and the output port of the drain groove is blocked by a sealing plug.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention integrates quick freezing function and freeze drying function into the freeze drying structure by design, so that the winter jujube can be directly moved to the freeze drying warehouse through the winter jujube storage plate rack for drying after the quick freezing in the quick freezing warehouse, thereby avoiding the loss of cold energy during transportation, ensuring the freeze drying quality of the winter jujube, and reducing the amount of electricity required for refrigeration to a certain extent, making the device more energy-saving and environmentally friendly. At the same time, the winter jujube pulp pipe chamber, the spiral ribbon rod and the related liquid circulation structure in the device use the winter jujube pulp or liquid materials with similar properties to the winter jujube in the quick freezing stage to assist, utilize the characteristics of synchronous ice crystallization, and cooperate with ice crystal accumulation to promote the movement of the winter jujube storage plate rack, so as to realize the automatic connection from quick freezing to freeze drying, and promote more reflux of liquid materials during movement, thereby optimizing the preliminary preparation process of freeze drying and improving the efficiency of fresh-keeping processing;

[0024] 2. The present invention designs a cold trap structure. When the winter jujube storage plate rack is moved into the freeze-drying chamber, the rear airtight door panel pushes the top rod, driving the scraper to move along the surface of the heat exchange plate, scraping off the ice crystals and attachments attached to the surface of the heat exchange plate, causing them to fall into the drain trough for collection and regular discharge, thereby avoiding the influence of ice crystals and attachments on the heat exchange efficiency of the equipment, extending the service life of the equipment, and reducing the equipment maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional structural view of the present invention;

[0026] Figure 2 It is an overall cross-sectional view of the present invention;

[0027] Figure 3 It is a disassembled diagram of the overall structure of the present invention;

[0028] Figure 4 It is a cross-sectional view of the quick freezing chamber, freeze drying chamber and cold trap structure of the present invention;

[0029] Figure 5 The internal structure cross-section and partial enlarged view of the quick freezing chamber and freeze drying chamber of the present invention;

[0030] Figure 6 This is a cross-sectional view of the winter jujube storage rack of the present invention;

[0031] Figure 7 It is a schematic diagram of a scraper of the present invention;

[0032] Figure 8 For the present invention Figure 5 A magnified image of A;

[0033] Fig. 9 It is a schematic diagram of the bottom structure of the winter jujube storage plate rack of the present invention.

[0034] In the figure:

[0035] 1. Freeze-dried structure;

[0036] 11. Quick freezing chamber; 111. Guide rail; 112. Heat exchange plate;

[0037] 12. Freeze drying chamber; 121. Push control switch; 122. Limiting slide; 123. Check valve;

[0038] 13. Winter jujube storage board rack; 131. Airtight door panel; 1311. Airtight docking slot; 132. Lower sealing plate; 133. Passive slider;

[0039] 14. Winter jujube pulp pipe chamber; 141. pulp flow pipe; 1411. filter pipe head; 1412. pulp outlet; 142. check valve;

[0040] 143. High heat-resistant and insulated telescopic tube; 144. Spring connection ring groove;

[0041] 15. Reflux channel;

[0042] 16. Heating plate group; 161. Airtight plate head;

[0043] 2. Screw rod; 21. Resistance spring;

[0044] 3. Cold trap structure; 31. End body; 311. Vacuum connection interface; 312. Drain trough; 32. Heat exchange fin; 33. Scraper; 331. Push rod; 332. Return spring. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figures 1 to 9 The present invention provides a technical solution of a winter jujube fruit preservation and processing device:

[0047] A winter jujube fruit preservation and processing device, comprising:

[0048] The freeze-drying structure 1 is divided into two parts, the front part has the ability of quick freezing, and the back part has the ability of vacuum low-temperature heating;

[0049] The cold trap structure 3 is airtightly connected to the rear end of the freeze-drying structure 1 by bolts, and is connected to the filter and the vacuum system;

[0050] The freeze-drying structure 1 includes a quick-freezing bin 11, the front end of the quick-freezing bin 11 is provided with an end cover for sealing, and a flange ring is provided at the rear port, and the flange ring cooperates with bolts to connect with a flange ring integrally provided at the front port of the freeze-drying bin 12 after clamping a gasket. The quick-freezing bin 11 and the freeze-drying bin 12 are both provided with a refrigeration module that radiates cold from the left and right sides to the central axis, and the inner walls of the quick-freezing bin 11 and the freeze-drying bin 12 are both provided with a heat exchange plate 112 for heat exchange, and the inner radius of the quick-freezing bin 11 is larger than the inner radius of the freeze-drying bin 12, and the length of the quick-freezing bin 11 is smaller than the length of the freeze-drying bin 12;

[0051] Among them, the interior of the quick freezing warehouse 11 wall is provided with a winter jujube pulp pipe chamber 14 for heat exchange between the heat exchange plate 112 and the inside of the quick freezing warehouse 11 at a specified distance, and the rear end of the winter jujube pulp pipe chamber 14 passes through the quick freezing warehouse 11 and is openly arranged. Below the inner wall of the quick freezing warehouse 11, guide rails 111 are fixedly arranged on the left and right sides of the heat exchange plate 112, and the guide rails 111 are slidably connected to the winter jujube storage plate rack 13, and the bottom surface of the winter jujube storage plate rack 13 is integrally provided with a plurality of guide rails 111. A limiting slide body is provided for sliding with the guide rail 111, and the front and rear ends of the winter jujube storage plate rack 13 are integrally fixed with an airtight door plate 131, and the surface of the airtight door plate 131 corresponds to the limiting slide body and is provided with an arched open groove body that allows the heat exchange plate 112 to slide through, and the sealing rings of the two airtight door plates 131 are both arranged near the rear side, and the outer radius of the airtight door plates 131 is smaller than the inner radius of the quick freezing chamber 11 and equal to the inner radius of the freeze drying chamber 12, and The front end of the airtight door panel 131 located at the front side is provided with a baffle whose radius is greater than the inner radius of the freeze-drying bin 12 and less than or equal to the inner radius of the quick-freezing bin 11. An arc-shaped lower sealing plate 132 is fixedly arranged between the two airtight door panels 131 directly below the winter jujube storage plate rack 13. After the lower sealing plate 132 is moved into the freeze-drying bin 12 along with the winter jujube storage plate rack 13, it covers the upper end of the limiting slide slot 122 opened directly below the freeze-drying bin 12, and is located at the winter jujube storage plate rack 13. An arched passive slider 133 is fixedly arranged below the side of the airtight door plate 131 on the rear side, and initially, the passive slider 133 is slidably arranged at intervals at the position of the rear port of the winter jujube pulp tube chamber 14, and the existence of the winter jujube pulp tube chamber 14 does not affect the airtightness of the passive slider 133. A rectangular airtight docking slot 1311 is opened symmetrically along the diameter on the surface of the airtight door plate 131, and the airtight docking slot 1311 is located between the plate layers of the winter jujube storage plate rack 13;

[0052] The freeze-drying chamber 12 includes a box body, a circulation system, a condenser, a refrigeration system, and a control system, etc. A heating plate group 16 is fixedly installed on the rear wall thereof corresponding to the airtight docking slot 1311, and an airtight plate head 161 for sliding sealing is fixedly arranged on the front side of the heating plate group 16. The interior of the heating plate group 16 is equipped with an electric heating module, and after sliding parallel and sealing docking with the winter jujube storage plate rack 13, the heating plate group 16 is directly below each layer of the winter jujube storage plate rack 13, and does not contact the winter jujube fruits evenly placed on the surface of the winter jujube storage plate rack 13;

[0053] The winter jujube pulp tube chamber 14 is interconnected with the limiting slide 122 and is on the same straight line and is separated by a passive slider 133. The winter jujube pulp tube chamber 14 and the limiting slide 122 are internally rotatably provided with a spiral rod 2, and the spiral rod 2 is composed of a spiral rod part body and a light rod part body, wherein the spiral rod part body is rotatably arranged inside the winter jujube pulp tube chamber 14, and the light rod part body passes through the winter jujube pulp tube chamber 14 and enters the limiting slide 122 through the through hole opened on the surface of the passive slider 133, and extends straightly along the limiting slide 122 to pass through the freeze-drying chamber 12, and passes through the cold trap structure 3 and is connected to the driving motor with a coupling, and the length of the limiting slide 122 is equal to the length of the winter jujube storage plate rack 13 and the two The length of the airtight door plate 131 and the length of the limiting slide groove 122 are less than the length of the freeze-drying chamber 12, and the front and rear sides of the passive slider 133 are sleeved with a freely retractable high-insulation telescopic tube 143 on the rod body of the spiral rod 2, and one end of the two high-insulation telescopic tubes 143 is respectively fixed on the rear wall of the extended part of the limiting slide groove 122 connected to the freeze-drying chamber 12 and the port position of the winter jujube pulp pipe chamber 14, and the rear high-insulation telescopic tube 143 is fixed with at least one pulp flow pipe 141 and at least one check valve 142 on the rear wall surface of the extended part of the limiting slide groove 122 connected to the inside, and the pulp flow pipe 141 and the check valve 142 are both distributed in an annular manner along the axis, and the pulp flow pipe 141 and the check valve 142 are The check valves 142 are arranged at intervals with each other, wherein a slurry outlet 1412 is provided on the side of the slurry flow pipe 141 at a position close to the check valve 142, and a filter pipe head 1411 is integrally connected to the position close to the spiral ribbon of the spiral ribbon rod 2 after the front end of the slurry flow pipe 141 passes through the passive slider 133, the check valve 142 is connected to the input end of the reflux liquid channel 15 which is opened in the freeze-drying bin 12 and is located directly below the winter jujube slurry pipe chamber 14 and the limiting chute 122, the output end of the reflux liquid channel 15 is connected to the front end of the winter jujube slurry pipe chamber 14, a resistance spring 21 is sleeved on the rod body of the bare rod part of the spiral ribbon rod 2, and the front end of the resistance spring 21 is fixed to the passive slider 133, and the rear end of the resistance spring 21 is fixed The inner wall of the spring connection ring groove 144 is fixed inside the freeze-drying bin 12 between the screw rod 2 and the pulp flow tube 141. The winter jujube pulp tube chamber 14 and the high heat-resistant insulation telescopic tube 143 store winter jujube pulp or liquid materials with similar properties to winter jujube. The passive slider 133 is in a sliding and sealed connection with the screw rod 2 and the pulp flow tube 141. After the winter jujube storage plate rack 13 is moved into the freeze-drying bin 12, the baffle of the airtight door panel 131 on the front side will push the push control switch 121 to open. The push control switch 121 is fixedly arranged in the isolation installation groove opened at the front port of the freeze-drying bin 12, and is electrically connected to the freeze-drying bin 12 control system through a line, thereby controlling the operation of the vacuum system.

[0054] During operation, the pretreated winter jujubes are placed on the winter jujube storage plate rack 13, the end cover of the quick-freezing chamber 11 is closed, the refrigeration module and the driving motor of the quick-freezing chamber 11 are started, so that the screw rod 2 rotates to transport the liquid material for circulation, the winter jujubes are ice-crystallized, and the liquid material is also frozen. The accumulation of ice crystals pushes the passive slider 133 and the winter jujube storage plate rack 13 to move toward the freeze-drying chamber 12, and the compression resistance spring 21 and the high-resistance heat-insulating telescopic tube 143 allow more liquid material to flow back. When the winter jujube storage plate rack 13 moves into the freeze-drying chamber 12, the heating plate group 16 is interspersed and sealed, and the baffle of the front airtight door panel 131 is opened, and the push control switch 121 is pressed to start the vacuum system to evacuate. At the same time, the heating plate group 16 and the refrigeration system are started according to the procedure to preserve and process the winter jujubes. After completion, the relevant systems are turned off, and the ice crystals are melted. The end cover is manually opened, the winter jujube storage plate rack 13 is reset, and the dried winter jujubes are collected.

[0055] In summary, the quick freezing function and the freeze-drying function are integrated into the freeze-drying structure 1 by design, so that the winter jujube can be directly moved to the freeze-drying warehouse 12 for drying through the winter jujube storage plate rack 13 after the quick freezing in the quick freezing warehouse 11, thereby avoiding the loss of cold energy during transportation, ensuring the freeze-drying quality of the winter jujube, and reducing the amount of electricity required for refrigeration to a certain extent, making the device more energy-saving and environmentally friendly. At the same time, the winter jujube pulp tube chamber 14, the spiral ribbon rod 2 and the related liquid circulation structure in the device use winter jujube pulp or liquid materials with similar properties to winter jujube to assist in the quick freezing stage, utilize the characteristics of synchronous ice crystallization, and cooperate with ice crystal accumulation to promote the movement of the winter jujube storage plate rack 13, so as to realize the automatic connection from quick freezing to freeze drying, and promote more reflux of liquid materials during movement, thereby optimizing the preliminary preparation process for freeze drying and improving the efficiency of fresh-keeping processing.

[0056] As an embodiment of the present invention, Figure 2 , Figure 4 and Figure 7As shown, the cold trap structure 3 includes an end body 31, and a flange ring is provided at the rear port of the end body 31, and the flange ring cooperates with bolts to connect with the flange ring integrally arranged at the rear port of the freeze-drying bin 12 behind the clamping gasket. A vacuum connection interface 311 is connected to the center of the rear surface of the end body 31, and the vacuum connection interface 311 is connected to the filter and the vacuum pump system through bolts. A cold trap space is provided inside the end body 31, and the cold trap space cooperates with the heat exchange plate 32 fixed along the axial ring array on the inner wall of the side close to the freeze-drying bin 12 to capture ice. A plurality of through holes are opened on the sealing plate surface that isolates the end body 31 from the freeze-drying bin 12, and a check valve 123 is installed inside the through hole. The interior of the cold trap space of the end body 31 A scraper 33 is provided on the side close to the freeze-drying bin 12 so as to slide along the surface path of the heat exchange plate 32. A push rod 331 is fixedly provided on the scraper 33 facing the center position of the plate surface of the freeze-drying bin 12, and the push rod 331 is inserted into the interior of the freeze-drying bin 12 through a through hole opened on the surface of the sealing plate for sliding sealing. A return spring 332 is fixedly provided on the surface of the scraper 33 facing the vacuum connection interface 311, and one end of the return spring 332 is fixed on the inner wall of the cold trap space of the end body 31. A drain groove 312 is provided at the lower part of the interior of the end body 31, which is open from the rear side of the heat exchange plate 32 to the outside, and the drain groove 312 is arranged to be inclined rearward and downward, and the output port of the drain groove 312 is blocked by a sealing plug.

[0057] During operation, the airtight door panel 131 on the rear side will push the push rod 331, so that the push rod 331 drives the scraper 33 to move along the surface of the heat exchange plate 32, thereby scraping off the ice crystals and attachments attached to the surface of the heat exchange plate 32, and making the ice crystals and attachments fall into the interior of the sewage trough 312 for collection and regular discharge.

[0058] In summary, by designing the cold trap structure 3, when the winter jujube storage plate rack 13 is moved into the freeze-drying chamber 12, the rear airtight door panel 131 pushes the top rod 331, driving the scraper 33 to move along the surface of the heat exchange plate 32, scraping off the ice crystals and attachments attached to the surface of the heat exchange plate 32, causing them to fall into the drain trough 312 for collection and regular discharge, thereby avoiding the influence of ice crystals and attachments on the heat exchange efficiency of the equipment, extending the service life of the equipment, and reducing the equipment maintenance cost.

[0059] Working principle: during operation, first push the pre-treated winter jujubes through the carrier through the airtight docking slot 1311 to the winter jujube storage plate rack 13, close the end cover at the front end of the quick-freezing chamber 11, start the refrigeration module of the quick-freezing chamber 11, and start the driving motor to drive the screw rod 2 to rotate. The screw rod 2 in the rotating state will continue to spirally transport the winter jujube pulp or liquid materials with similar properties to the winter jujube backwards, so that it passes through the filter pipe head 1411 through the winter jujube pulp pipe chamber 14 and the pulp outlet 1412 into the interior of the high-resistance heat-insulating telescopic pipe 143, and then the high-resistance heat-insulating telescopic pipe 143 is immersed in the reflux liquid channel 15 through the check valve 142, and refluxes back to the interior of the winter jujube pulp pipe chamber 14 along the reflux liquid channel 15. At the same time, the refrigeration module of the quick-freezing chamber 11 radiates into the chamber. The winter jujubes are quickly frozen by the heat exchange plate 112, and the winter jujube pulp or liquid material with similar properties to the winter jujubes is also cooled by the heat exchange plate 112, and is simultaneously frozen into an ice crystal state together with the winter jujubes. As the winter jujube pulp or liquid material with similar properties to the winter jujubes gradually changes into an ice crystal state, the ice crystals are gradually accumulated on the front side of the passive slider 133 under the continuous conveyance of the spiral ribbon rod 2. As the ice crystals continue to accumulate, the passive slider 133 is pushed to slide along the limited slide groove 122 and the spiral ribbon rod 2 under the conveying pressure of the spiral ribbon rod 2, thereby pushing the winter jujube storage plate rack 13 inside the quick-freezing bin 11, so that it moves along the guide groove 122 inside the quick-freezing bin 11 and the freeze-drying bin 12. The rail 111 moves toward the interior of the freeze-drying bin 12. At this time, the quick-freezing bin 11 stops freezing the winter jujubes, and the cold air inside the quick-freezing bin 11, with the assistance of the winter jujube storage plate rack 13 and the front and rear airtight door panels 131, will be transported to the interior of the freeze-drying bin 12 as it moves toward the interior of the freeze-drying bin 12. In this process, as the passive slider 133 moves along the limited slide groove 122 and the screw rod 2, the resistance spring 21 and the high heat-resistant and insulated telescopic tube 143 on the same side as the resistance spring 21 will be compressed at the same time, thereby reducing the storage space for the winter jujube pulp or liquid materials with similar properties to the winter jujubes, so that the winter jujube pulp or liquid materials with similar properties to the winter jujubes will further flow into the interior of the winter jujube pulp tube chamber 14 through the reflux liquid channel 15 until the screw rod 2 pushes the winter jujubes out. The ice crystals formed by the slurry or liquid materials with similar properties to the winter jujube can achieve the purpose of pushing the winter jujube storage plate rack 13 into the freeze-drying bin 12. When the winter jujube storage plate rack 13 is moved into the freeze-drying bin 12, the heating plate group 16 will be inserted between the plate layers of the winter jujube storage plate rack 13 with the cooperation of the airtight plate head 161, and the airtight docking slot 1311 will be inserted and sealed. At this time, the front airtight door plate 131 is just moved to the position of the original rear airtight door plate 131, and the rear airtight door plate 131 will push the push rod 331, so that the push rod 331 drives the scraper 33 to move along the surface of the heat exchange plate 32, so as to scrape off the ice crystals and attachments attached to the surface of the heat exchange plate 32, so that the ice crystals and attachments fall into the interior of the sewage trough 312 for collection and regular discharge.The baffle of the front airtight door panel 131 will push the push control switch 121 to open, and then the push control switch 121 will cooperate with the control end of the freeze-drying bin 12 to start the vacuum system, and then the vacuum system will run, and the inside of the freeze-drying bin 12 will be vacuumed through the winter jujube storage plate rack 13, the check valve 123 and the airtight door panel 131, so that the inside of the freeze-drying bin 12 quickly reaches the freeze-drying vacuum standard. At the same time, the heating plate group 16 and the refrigeration system of the freeze-drying bin 12 will be started to meet the freeze-drying preservation conditions of the winter jujube, and then the specified freeze-drying preservation program can be installed to perform the preservation processing of the winter jujube until the preservation is completed. After the preservation is completed, the vacuum system, the heating plate group 16 and the refrigeration system can be turned off. After waiting for a specified time, the front end cover of the quick-freezing bin 11 is manually opened, and then a certain period of time is waited for the ice crystals inside the winter jujube pulp tube chamber 14 to melt, and then the winter jujube storage plate rack 13 can be manually pulled to move and reset to the initial position, and the dried winter jujube can be collected.

[0060] It should be noted that when the winter dates are quick-frozen and freeze-dried, the guide rail 111 at the front port of the freeze-drying chamber 12 is provided with fixed columns, and the fixed columns are respectively located in the arched open grooves of the rear and front airtight door panels 131, and are sealed with sealing strips.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winter jujube fruit preservation and processing device, characterized in that: include: The freeze-drying structure (1) is divided into two parts, the front part has the ability of quick freezing, and the back part has the ability of vacuum low-temperature heating; The cold trap structure (3) is airtightly connected to the rear end of the freeze-drying structure (1) by bolts, and is connected to the filter and the vacuum system; The freeze-drying structure (1) comprises a quick-freezing chamber (11), the rear end of the quick-freezing chamber (11) is connected to the freeze-drying chamber (12) by means of bolts, and the inner walls of the quick-freezing chamber (11) and the freeze-drying chamber (12) are both provided with heat exchange plates (112) for heat exchange; Wherein, a winter jujube pulp pipe chamber (14) for cooperating with the heat exchange plate (112) and exchanging heat with the inside of the quick freezing chamber (11) is provided at a specified interval below the wall of the quick freezing chamber (11), and the rear end of the winter jujube pulp pipe chamber (14) passes through the quick freezing chamber (11) and is openly provided, and guide rails (111) are fixedly provided on the left and right sides of the heat exchange plate (112) below the inner wall of the quick freezing chamber (11), and the guide rails (111) are slidably connected to the winter jujube storage plate rack (13), and the front and rear ends of the winter jujube storage plate rack (13) are integrally fixedly provided with airtight door panels (131), and an arched passive slider (133) is fixedly provided below the side of the airtight door panel (131) located at the rear side of the winter jujube storage plate rack (13), and the surface of the airtight door panel (131) is symmetrically provided with rectangular airtight docking slots (1311) along the diameter; A heating plate group (16) is fixedly installed on the rear wall inside the freeze-drying chamber (12) corresponding to the airtight docking slot (1311), and an airtight plate head (161) for sliding sealing is fixedly arranged on the front side of the heating plate group (16); The winter jujube pulp tube chamber (14) and the limiting slide groove (122) are internally provided with a spiral rod (2) for rotation. After a part of the rod body of the spiral rod (2) passes through the winter jujube pulp tube chamber (14), it enters the limiting slide groove (122) through the through hole provided on the surface of the passive slider (133), and extends straight along the limiting slide groove (122) to pass through the freeze-drying chamber (12), and after passing through the cold trap structure (3), it is connected to the driving motor with a coupling. The front and rear sides of the passive slider (133) are sleeved with a high heat-resistant and insulating telescopic tube (143) on the rod body of the spiral rod (2), and the two One end of the high-insulation telescopic tube (143) is fixed to the rear wall of the freeze-drying bin (12) and the port position of the winter jujube pulp pipe chamber (14), respectively, and at least one pulp flow pipe (141) and at least one check valve (142) are fixedly arranged on the rear wall surface of the extended part of the connecting portion of the slide groove (122) inside the rear side of the high-insulation telescopic tube (143), wherein the check valve (142) is connected to a reflux liquid channel (15) opened at the lower part of the freeze-drying bin (12), and the output end of the reflux liquid channel (15) is connected to the front end of the winter jujube pulp pipe chamber (14).

2. A winter jujube fruit preservation and processing device according to claim 1, characterized in that: The inner radius of the quick freezing chamber (11) is larger than the inner radius of the freeze drying chamber (12); the length of the quick freezing chamber (11) is smaller than the length of the freeze drying chamber (12); the bottom surface of the winter jujube storage plate rack (13) is integrally provided with a limiting slide body for sliding in cooperation with the guide rail (111); and the surface of the airtight door panel (131) is provided with an arched open groove body corresponding to the limiting slide body to allow the heat exchange plate (112) to slide through.

3. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: The sealing rings of the two airtight door panels (131) are both arranged at positions close to the rear side, and the outer radius of the airtight door panels (131) is smaller than the inner radius of the quick freezing chamber (11) and is equal to the inner radius of the freeze drying chamber (12), and the front end of the airtight door panel (131) located at the front side is provided with a baffle having a radius greater than the inner radius of the freeze drying chamber (12) and less than or equal to the inner radius of the quick freezing chamber (11).

4. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: An arc-shaped lower sealing plate (132) is fixedly arranged between two airtight door plates (131) directly below the winter jujube storage plate rack (13), and the lower sealing plate (132) covers the upper end of a limiting slide groove (122) opened directly below the inside of the freeze-drying bin (12) after the winter jujube storage plate rack (13) is moved into the freeze-drying bin (12) along with the winter jujube storage plate rack (13).

5. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: The heating plate group (16) is provided with an electric heating module inside, and after sliding parallel and sealingly docking with the winter jujube storage plate rack (13), it is located directly below each layer of the winter jujube storage plate rack (13) and does not contact the winter jujube fruits evenly placed on the surface of the winter jujube storage plate rack (13).

6. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: The length of the limiting slide groove (122) is equal to the sum of the lengths of the winter jujube storage plate rack (13) and the two airtight door panels (131), and the length of the limiting slide groove (122) is less than the length of the freeze-drying chamber (12).

7. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: The slurry flow pipe (141) and the check valve (142) are both distributed in an annular manner along the axis, and the slurry flow pipe (141) and the check valve (142) are arranged at intervals from each other, wherein a slurry outlet (1412) is provided on the side surface of the slurry flow pipe (141) at a position close to the check valve (142), and a filter screen pipe head (1411) is integrally connected and provided at a position close to the spiral ribbon of the spiral ribbon rod (2) after the front end of the slurry flow pipe (141) passes through the passive slider (133).

8. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: A resistance spring (21) is sleeved on the rod body of the bare rod portion of the spiral rod (2), and the front end of the resistance spring (21) is fixed to the passive slider (133), and the rear end of the resistance spring (21) is fixed to the inner wall of a spring connection ring groove (144) opened between the spiral rod (2) and the pulp flow tube (141) inside the freeze-drying bin (12). The passive slider (133) is in a sliding and sealed connection relationship with the spiral rod (2) and the pulp flow tube (141). After the winter jujube storage plate rack (13) is moved into the freeze-drying bin (12), the baffle of the airtight door plate (131) located on the front side will push the push control switch (121) to open. The push control switch (121) is fixedly arranged in an isolation installation groove opened at the front port of the freeze-drying bin (12), and is electrically connected to the freeze-drying bin (12) control system through a line, thereby controlling the operation of the vacuum system.

9. The winter jujube fruit preservation and processing device according to claim 1, characterized in that: The cold trap structure (3) comprises an end body (31), wherein a flange ring is provided at a rear port of the end body (31), and the flange ring cooperates with bolts to be connected with a flange ring integrally arranged at a rear port of the freeze-drying bin (12) behind a clamping gasket. A vacuum connection interface (311) is provided at a central position of a rear surface of the end body (31), and the vacuum connection interface (311) is connected to a filter and a vacuum pump system through bolts. A cold trap space is provided inside the end body (31), and the cold trap space cooperates with a heat exchange plate (32) fixed along an axial ring array on an inner wall of a side close to the freeze-drying bin (12) to capture ice. A plurality of through holes are provided on a sealing plate surface that isolates the end body (31) from the freeze-drying bin (12), and a check valve (123) is installed inside the through hole. The interior of the cold trap space of the end body (31) is provided with a heat exchange plate (32) fixed along an axial ring array on a side close to the freeze-drying bin (12). A scraper (33) is provided on one side close to the freeze-drying bin (12) to slide along the surface path of the heat exchange plate (32); a push rod (331) is fixedly provided on the scraper (33) facing the center position of the plate surface of the freeze-drying bin (12); and the push rod (331) is inserted into the interior of the freeze-drying bin (12) through a through hole provided on the surface of the sealing plate in a sliding and sealed manner; a return spring (332) is fixedly provided on the surface of the scraper (33) facing the vacuum connection interface (311); and one end of the return spring (332) is fixed on the inner wall of the cold trap space of the end body (31); a drain groove (312) is provided at the lower part of the interior of the end body (31) to penetrate and open from the rear side of the heat exchange plate (32) to the outside; and the drain groove (312) is arranged to be inclined rearward and downward, and the output port of the drain groove (312) is blocked by a sealing plug.

Images