Vacuum freeze-dried rice noodle quick-freezing forming freezer

Abstract

The invention belongs to the technical field of rice noodle processing, and particularly relates to a vacuum freeze-dried rice noodle quick-freezing forming freezer which comprises a freezing mechanism, a vacuum exhaust mechanism, an air inlet mechanism, a transmission mechanism and a placement mechanism, a dynamic vacuumizing mode is adopted, an air inlet pipe and a vacuumizing exhaust pipe are arranged, and the exhaust pipe is connected with a vacuum pump; the air suction amount of the vacuum pump is larger than the air inlet amount of the air inlet pipe, so that air flow circulates in the freezing cavity while the negative pressure state is kept in the freezing cavity, moisture generated by freeze-drying flows out rapidly along with the air flow in the freezing process, rapid freeze-drying is achieved, the freeze-drying efficiency is improved, and when the air flow circulates, the air flow drives the transmission mechanism to work. The transmission mechanism drives the placing mechanism to move, the breathable placing mechanism is adopted, rice noodles are placed in the placing mechanism, the rice noodles move along with the placing mechanism, the rice noodles make full contact with flowing air flow, and moisture on the rice noodles can be conveniently taken away by the air flow.

Description

Technical Field

[0001] This invention relates to the field of rice noodle processing technology, specifically to a vacuum freeze-drying rice noodle quick-freezing forming freezer. Background Technology

[0002] Rice noodles are a specialty snack in southern China, often simply called "fen" by people from Jiangxi province. They are made from rice through soaking, steaming, and pressing processes, resulting in strips or strands, not the powdered product of rice as the name might suggest. Rice noodles are soft yet chewy and elastic; they don't become mushy when boiled and don't break easily when stir-fried. They are served with various toppings or in soups, offering a smooth and flavorful experience that is beloved by many, especially in southern China. There are many varieties of rice noodles, including flat rice noodles, square rice noodles, wavy rice noodles, thin rice noodles, wet rice noodles, and dry rice noodles.

[0003] Rice noodles are an important part of many people's daily diet, providing essential nutrients and energy to meet the body's needs. They are also a traditional delicacy in many southern regions, representing local food culture and history. After rice is made into rice noodles, at room temperature, bacteria, yeast, and other microorganisms multiply within the rice, breaking down its nutrients, producing odors, and altering its texture—in other words, "sour." Therefore, to preserve rice noodles for a longer period, they need to be dried. Freeze dryers excel in food drying and preservation, particularly in retaining nutrients, color, aroma, and flavor.

[0004] Existing freeze dryers mainly include the following steps when freeze-drying rice noodles:

[0005] Freezing: The rice noodles are frozen at low temperature so that frost forms on the surface; Vacuuming: The rice noodles are placed in the freeze-drying chamber and the chamber is evacuated by a vacuum pump to maintain a low-pressure state; Heating: The heat required for sublimation is provided to facilitate heat absorption during sublimation.

[0006] When in use, existing freeze dryers place rice flour in a tray for freeze drying, which has the following problems: However, when using a single vacuum pump to create a vacuum, the negative pressure inside the chamber is low at the beginning of the vacuuming process, and the airflow velocity is high. As the negative pressure inside the chamber increases, the airflow velocity will continuously decrease, resulting in the freeze drying process being able to slowly extract the internal moisture, but not quickly extracting the internal moisture, resulting in low freeze drying efficiency.

[0007] The tray itself is not breathable. During freeze-drying, because the rice flour has many pores, the frost inside the pores cannot be breathed and sublimated, which affects the freeze-drying efficiency.

[0008] To address this, a vacuum freeze-drying rice noodle quick-freezing and shaping freezer is proposed to improve freeze-drying efficiency. Summary of the Invention

[0009] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0010] In view of the above and / or existing problems in rice noodle processing, the present invention is proposed.

[0011] Therefore, the purpose of this invention is to provide a vacuum freeze-drying rice noodle quick-freezing forming freezer, which adopts a dynamic vacuuming method, and is equipped with an air inlet pipe and a vacuum extraction pipe. The extraction pipe is connected to a vacuum pump, and the vacuum pump's extraction volume is greater than the air inlet volume of the air inlet pipe. This maintains a negative pressure state in the freezing chamber while allowing airflow to circulate within the freezing chamber. During the freezing process, the moisture generated during freeze-drying flows out quickly with the airflow, achieving rapid freeze-drying and improving freeze-drying efficiency. When the airflow is flowing, the airflow drives the transmission mechanism to work, and the transmission mechanism drives the placement mechanism to move. A breathable placement mechanism is used, and the rice noodles are placed in the placement mechanism, allowing the rice noodles to move with the placement mechanism and fully contact the flowing airflow, facilitating the airflow to remove moisture from the rice noodles.

[0012] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0013] A vacuum freeze-drying rice noodle quick-freezing forming freezer, comprising:

[0014] A refrigeration mechanism includes a body, a refrigeration chamber, a working chamber, a rotating bracket, a sliding bracket, a refrigeration component, and an air inlet. The refrigeration chamber is located at the upper part of the body, and the working chamber is located at the lower part of the body. The rotating bracket is installed on the rear wall of the inner cavity of the refrigeration chamber, and the sliding bracket is installed on the rotating bracket. The refrigeration component is installed on the rear wall of the inner cavity of the refrigeration chamber, and an air inlet communicating with the working chamber is located at the bottom of the refrigeration chamber.

[0015] A vacuum exhaust mechanism is connected to the top of the freezing chamber;

[0016] An intake mechanism is connected to the intake port;

[0017] The transmission mechanism is located inside the freezing chamber;

[0018] The placement mechanism is mounted on the rotating bracket and connected to the transmission mechanism.

[0019] As a preferred embodiment of the vacuum freeze-dried rice flour quick-freezing forming freezer of the present invention, the vacuum exhaust mechanism includes a vacuum pump, an air extraction pipe and an air extraction hopper. The vacuum pump is fixed at the top of the freezing chamber, the air extraction end of the vacuum pump is connected to the air extraction pipe extending into the freezing chamber, and an air extraction hopper is provided at the end of the air extraction pipe.

[0020] As a preferred embodiment of the vacuum freeze-dried rice flour quick-freezing forming freezer of the present invention, the air intake mechanism includes an air intake pipe, an air intake bend, an air supply nozzle, an air supply valve, an air filter box, and an air filter plate. The air intake pipe is connected to the air intake interface. An air intake bend is provided at the upper end of the air intake pipe at the bottom of the freezing chamber. An evenly distributed air supply nozzle is provided at the top of the air intake bend. An air supply valve is provided at the lower part of the air intake pipe. The lower end of the air intake pipe is connected to the air filter box. An evenly distributed air filter plate is inserted into the air filter box.

[0021] As a preferred embodiment of the vacuum freeze-dried rice flour quick-freezing forming freezer of the present invention, the transmission mechanism includes a transmission shaft, a transmission bevel gear and a drive impeller. The transmission shaft is longitudinally rotatably connected to the freezing chamber. The transmission bevel gear is provided on the transmission shaft. The drive impeller is provided at the upper end of the transmission shaft and is located inside the air extraction hopper.

[0022] As a preferred embodiment of the vacuum freeze-dried rice noodle quick-freezing forming freezer of the present invention, the placement mechanism includes a placement ventilated tray, a cover plate, a placement groove, a sliding sleeve, a disc, a horizontal shaft, and a driven bevel gear. The cover plate is hinged to the top of the ventilated tray, and a placement groove is provided inside the ventilated tray. Sliding sleeves are provided at both the left and right ends of the ventilated tray. A disc is provided on the left sliding sleeve. A horizontal shaft is slidably connected inside both sliding sleeves. The horizontal shaft is rotatably connected to a rotating bracket. A driven bevel gear that meshes with the transmission bevel gear is provided on the left horizontal shaft.

[0023] In a preferred embodiment of the vacuum freeze-dried rice noodle quick-freezing forming freezer of the present invention, an elliptical disk is provided on the upper part of the transmission shaft, a sliding groove is provided on the circumference of the elliptical disk, a transmission connecting rod is connected between the sliding groove and the disk, and the transmission connecting rod is slidably connected to the sliding bracket.

[0024] In a preferred embodiment of the vacuum freeze-dried rice noodle quick-freezing forming freezer of the present invention, the transmission connecting rod includes an L-shaped rod, a groove and a slider. The L-shaped rod is slidably connected to the sliding bracket. The lower end of the L-shaped rod is provided with a groove that is slidably connected to the disc, and the upper end of the L-shaped rod is provided with a slider that is slidably connected to the sliding groove.

[0025] As a preferred embodiment of the vacuum freeze-dried rice noodle quick-freezing forming freezer of the present invention, wherein: an air outlet component is provided inside the air supply nozzle, the air outlet component includes a wind shaft and a driven impeller, the wind shaft is rotatably connected inside the air supply nozzle, and the driven impeller is provided at the top of the wind shaft.

[0026] As a preferred embodiment of the vacuum freeze-dried rice noodle quick-freezing forming freezer of the present invention, the working chamber is provided with ventilation slots on both sides, and dustproof mesh is provided in each ventilation slot.

[0027] In a preferred embodiment of the vacuum freeze-dried rice flour quick-freezing forming freezer described in this invention, a heating element is provided at the gap of the air inlet bend.

[0028] Compared with the prior art: The present invention adopts a dynamic vacuuming method, setting up an air inlet pipe and a vacuum extraction pipe. The extraction pipe is connected to a vacuum pump. The vacuum pump's extraction volume is greater than the air inlet volume of the air inlet pipe, so that the freezing chamber is kept under negative pressure while the airflow circulates in the freezing chamber. During the freezing process, the moisture generated by freeze drying flows out quickly with the airflow, realizing rapid freeze drying and improving freeze drying efficiency.

[0029] The rice noodles are placed on a movable tray mechanism. When the airflow is flowing, the airflow drives the transmission mechanism to work, and the transmission mechanism drives the placement mechanism to move. The placement mechanism is breathable, and the rice noodles are placed inside the placement mechanism so that the rice noodles move with the placement mechanism and can fully contact the flowing airflow, which facilitates the airflow to remove the moisture from the rice noodles.

[0030] Evenly distributed air nozzles are installed on the air intake bend of the air intake mechanism, so that the airflow is evenly blown onto the rice noodles, flows through the pores of the rice noodles, and makes full contact with the rice noodles, which facilitates the rapid sublimation of the frost in the pores of the rice noodles and improves the freeze-drying efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0032] Figure 1 This is a schematic diagram of the axial structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the internal connection structure of the refrigeration mechanism of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of the refrigeration mechanism of the present invention;

[0035] Figure 4 This is a schematic diagram of the intake mechanism structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the connection structure of the transmission mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the air outlet component of the present invention.

[0038] In the diagram: 100 Refrigeration mechanism, 110 Main body, 120 Refrigeration chamber, 130 Working chamber, 140 Rotating bracket, 150 Sliding bracket, 160 Refrigeration components, 170 Air inlet, 180 Ventilation duct, 190 Control panel, 200 Vacuum exhaust mechanism, 210 Vacuum pump, 220 Suction pipe, 230 Suction hopper, 300 Air inlet mechanism, 310 Air inlet pipe, 320 Air inlet bend, 330 Air supply nozzle, 340 Air supply valve, 350 Filter box, 360 Filter plate. 400 Transmission mechanism, 410 Transmission shaft, 420 Transmission bevel gear, 430 Drive impeller, 440 Elliptical disc, 450 Slide groove, 500 Placement mechanism, 510 Placement ventilated tray, 520 Cover plate, 530 Placement groove, 540 Sliding sleeve, 541 Disc, 550 Horizontal shaft, 560 Driven bevel gear, 600 Transmission connecting rod, 610 L-shaped rod, 620 Groove, 630 Slider, 700 Air outlet component, 710 Wind shaft, 720 Driven impeller, 800 Heating component. Detailed Implementation

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0043] This invention provides a vacuum freeze-drying rice noodle quick-freezing and shaping freezer. It employs a dynamic vacuuming method, featuring an air inlet pipe and a vacuum extraction pipe connected to a vacuum pump. The vacuum pump's extraction volume is greater than the air inlet pipe's intake volume, maintaining a negative pressure state within the freezing chamber while allowing airflow. During the freezing process, the moisture generated during freeze-drying flows out rapidly with the airflow, achieving rapid freeze-drying and improving efficiency. Simultaneously, the airflow drives a transmission mechanism, which in turn moves a placement mechanism. This breathable placement mechanism allows the rice noodles to move freely, ensuring ample contact between the rice noodles and the flowing airflow, facilitating the removal of moisture from the rice noodles. (See also...) Figures 1-6 It includes: a refrigeration mechanism 100, a vacuum exhaust mechanism 200, an air intake mechanism 300, a transmission mechanism 400, and a placement mechanism 500.

[0044] The refrigeration mechanism 100 includes a body 110, a refrigeration chamber 120, a working chamber 130, a rotating bracket 140, a sliding bracket 150, a refrigeration component 160, and an air inlet 170. The refrigeration chamber 120 is located at the upper part of the body 110, and the working chamber 130 is located at the lower part of the body 110. The rotating bracket 140 is installed on the rear wall of the inner cavity of the refrigeration chamber 120, and the sliding bracket 150 is installed on the rotating bracket 140. The refrigeration component 160 is installed on the rear wall of the inner cavity of the refrigeration chamber 120, and the air inlet 170, which communicates with the working chamber 130, is located at the bottom of the refrigeration chamber 120.

[0045] The freezing component 160 uses a conventional freezer, and the curved tube responsible for freezing is coiled around the rear wall of the inner cavity of the freezing chamber 120. The rice noodles in the freezing chamber 120 are frozen by the freezing component 160, and the air inlet 170 is used to connect to the air inlet pipe.

[0046] The vacuum exhaust mechanism 200 is connected to the top of the freezing chamber 120. The gas in the freezing chamber 120 is extracted through the vacuum exhaust mechanism 200 to create a negative pressure vacuum state in the freezing chamber 120.

[0047] The air intake mechanism 300 is connected to the air intake port 170 and is used to supply air into the freezing chamber 120.

[0048] A control panel 190 is installed on the outside of the body 110. Airflow detection sensors are installed on both the air intake mechanism 300 and the vacuum exhaust mechanism 200 to detect the internal pressure of the freezing chamber 120 in real time. At the same time, a proportional regulating valve is set to dynamically adjust the opening of the air intake valve and the exhaust rate of the vacuum pump according to the sensor data to maintain the set negative pressure value and form a dynamic vacuum state.

[0049] The transmission mechanism 400 is installed inside the freezing chamber 120. The transmission mechanism 400 is driven by the flowing air to transmit power.

[0050] The placement mechanism 500 is mounted on the rotating bracket 140 and connected to the transmission mechanism 400. The rice noodles are placed inside the placement mechanism 500, and the transmission mechanism 400 drives the placement mechanism 500 to move, so that the placement mechanism 500 can fully contact the airflow and facilitate the removal of moisture from the rice noodles.

[0051] The vacuum exhaust mechanism 200 includes a vacuum pump 210, a suction pipe 220 and a suction bucket 230. The vacuum pump 210 is fixed on the top of the freezing chamber 120. The suction end of the vacuum pump 210 is connected to the suction pipe 220 that extends into the freezing chamber 120. The suction bucket 230 is provided at the end of the suction pipe 220.

[0052] The vacuum pump 210 draws gas from the freezing chamber 120 through the suction pipe 220 and the suction bucket 230, creating a vacuum state in the freezing chamber 120. A detection sensor is installed on the suction pipe 220 to detect the amount of gas drawn.

[0053] The air intake mechanism 300 includes an air intake pipe 310, an air intake bend 320, an air supply nozzle 330, an air supply valve 340, an air filter box 350, and an air filter plate 360. The air intake pipe 310 is connected to the air intake interface 170. The upper end of the air intake pipe 310 is provided with an air intake bend 320 located at the bottom of the freezing chamber 120. The top of the air intake bend 320 is provided with evenly distributed air supply nozzles 330. The lower part of the air intake pipe 310 is provided with an air supply valve 340. The lower end of the air intake pipe 310 is connected to the air filter box 350. Evenly distributed air filter plates 360 are inserted into the air filter box 350.

[0054] The air supply valve 340 is used to regulate the air intake volume, and a sensor is installed on the air intake pipe 310 to detect the air intake volume. The airflow enters from the air filter box 350, and after the air filter plate 360 ​​filters the water vapor and dust in the air, the airflow enters the freezing chamber 120 through the air intake pipe 310, the air intake bend 320 and the air supply nozzle 330. The air supply nozzles 330 are evenly distributed on the air intake bend 320 so that the airflow is evenly blown into the freezing chamber 120 to contact the rice noodles.

[0055] The transmission mechanism 400 includes a transmission shaft 410, a transmission bevel gear 420 and a drive impeller 430. The transmission shaft 410 is longitudinally rotatably connected to the freezing chamber 120. The transmission bevel gear 420 is provided on the transmission shaft 410. The drive impeller 430 is provided at the upper end of the transmission shaft 410 and is located inside the suction hopper 230.

[0056] The bottom of the drive shaft 410 is rotatably connected to the bottom of the inner cavity of the freezing chamber 120, and the top of the drive shaft 410 is rotatably connected to the air extraction bucket 230. When air is extracted from the air extraction bucket 230, the air is driven by the drive impeller 430 to rotate the drive shaft 410. The drive shaft 410 synchronously drives the transmission bevel gear 420 to rotate, thereby realizing the conversion and transmission of power.

[0057] The placement mechanism 500 includes a placement ventilated tray 510, a cover plate 520, a placement groove 530, a sliding sleeve 540, a disc 541, a horizontal shaft 550, and a driven bevel gear 560. The cover plate 520 is hinged to the top of the ventilated tray 510. The placement groove 530 is provided inside the ventilated tray 510. Sliding sleeves 540 are provided at both the left and right ends of the ventilated tray 510. A disc 541 is provided on the left sliding sleeve 540. The horizontal shaft 550 is slidably connected inside both sliding sleeves 540. The horizontal shaft 550 is rotatably connected to the rotating bracket 140. A driven bevel gear 560 that meshes with the transmission bevel gear 420 is provided on the left horizontal shaft 550.

[0058] Both the breathable tray 510 and the cover plate 520 are made of breathable mesh, with evenly distributed placement slots 530 inside. The rice noodles are placed in the placement slots 530 and the cover plate 520 is put on to prevent the rice noodles from falling during movement. The driven bevel gear 560 rotates with the transmission bevel gear 420. The driven bevel gear 560 synchronously drives the horizontal shaft 550 to rotate. The horizontal shaft 550 synchronously drives the sliding sleeve 540 to rotate. The sliding sleeve 540 synchronously drives the breathable tray 510 to rotate, so that the rice noodles inside the breathable tray 510 move with the breathable tray 510, so that the rice noodles can fully contact the airflow and take away the moisture that has been released from the rice noodles.

[0059] Since sublimation is required during freeze-drying, an elliptical disk 440 is provided on the upper part of the drive shaft 410 in order to ensure that the rice noodles are fully heated. A groove 450 is provided around the circumference of the elliptical disk 440. A drive rod 600 is connected between the groove 450 and the disk 541. The drive rod 600 is slidably connected to the sliding bracket 150.

[0060] Among them, the drive shaft 410 synchronously drives the elliptical disk 440 to rotate. When the elliptical disk 440 rotates, it drives the transmission link 600 to move horizontally left and right. The transmission link 600 drives the ventilated tray 510 to move back and forth on the horizontal axis 550 through the disc 541, changing the heating position and improving the sublimation efficiency.

[0061] Specifically, the transmission link 600 includes an L-shaped rod 610, a groove 620, and a slider 630. The L-shaped rod 610 is slidably connected to the sliding bracket 150. The lower end of the L-shaped rod 610 is provided with a groove 620 that is slidably connected to the disc 541, and the upper end of the L-shaped rod 610 is provided with a slider 630 that is slidably connected to the slide groove 450.

[0062] Among them, the L-shaped rod 610 can slide laterally on the sliding bracket 150. When the elliptical disk 440 rotates, the sliding groove 450 on the outside of the elliptical disk 440 pushes the slider 630 to move laterally. The slider 630 drives the groove 620 to move laterally through the L-shaped rod 610. The groove 620 drives the breathable tray 510 to move back and forth laterally on the horizontal axis 550 through the disc 541. The structure of sliding connection does not affect the rotation state of the drive shaft 410 and the breathable tray 510 itself.

[0063] Since the airflow in the air supply nozzle 330 blows out vertically, the diffusion range is limited and it cannot fully contact the rice noodles. Therefore, an air outlet component 700 is provided inside the air supply nozzle 330. The air outlet component 700 includes a wind shaft 710 and a driven impeller 720. The wind shaft 710 is rotatably connected inside the air supply nozzle 330, and the driven impeller 720 is provided at the top of the wind shaft 710.

[0064] When the airflow is blown out from the air supply nozzle 330, the airflow drives the driven impeller 720 to rotate. The rotating driven impeller 720 disperses the airflow, so that the airflow is evenly diffused into the freezing chamber 120 to contact the rice noodles, and the upward airflow can facilitate the discharge of moisture.

[0065] Since air needs to be drawn into the freezing chamber 120, ventilation slots 180 are provided on both sides of the working chamber 130. Dustproof screens are installed in the ventilation slots 180 to achieve the effect of ventilation and air exchange. The dustproof screens perform preliminary purification and filtration of the air to prevent external debris from entering the freezing chamber 120.

[0066] During freeze-drying, the rice flour is first frozen at a low temperature. The rice flour needs to be frozen quickly to below the freezing point (usually -18°C to -40°C) to allow the water to form ice crystals.

[0067] Then a vacuum environment is provided, and the pressure needs to be reduced to below the triple point of water (about 646.5 Pa). At this point, the boiling point of ice is lower than its melting point, and it can sublimate directly.

[0068] The sublimation process provides the necessary heat. Sublimation is an endothermic process and requires external heating (such as a heating plate) to maintain energy balance at low temperatures and prevent sublimation from being interrupted due to insufficient heat. Therefore, a heating element 800 is installed at the gap of the air inlet bend 320. Since sublimation is an endothermic process, after freezing, the heating element 800 provides the heat required for sublimation. During heating, the heat is transferred to the air inlet bend 320, which raises the temperature of the airflow discharged from the air inlet bend 320. The airflow comes into direct contact with the rice noodles, improving the sublimation efficiency of the frozen rice noodles.

[0069] In actual use, place the rice noodles in the rice noodle placement slot 530, cover it with the cover plate 520 to prevent the rice noodles from falling during movement, then seal the freezing chamber 120, and freeze the rice noodles in the freezing chamber 120 through the freezing component 160.

[0070] The vacuum pump 210 is started, and it draws gas from the freezing chamber 120 through the suction pipe 220 and suction hopper 230, creating a vacuum in the freezing chamber 120. A detection sensor is installed on the suction pipe 220 to detect the amount of gas drawn. Dustproof screens are installed in the ventilation slots 180 to achieve ventilation and air exchange. The dustproof screens perform preliminary purification and filtration of the air to prevent external debris from entering the freezing chamber 120. The airflow enters from the filter box 350 and is filtered by the filter plate 360. After removing moisture and dust from the air, the airflow enters the freezing chamber 120 through the air inlet pipe 310, the air inlet bend pipe 320, and the air supply nozzle 330. The air supply nozzles 330 are evenly distributed on the air inlet bend pipe 320, so that the airflow is evenly blown into the freezing chamber 120 to contact the rice flour. A proportional regulating valve is set to dynamically adjust the opening of the air inlet valve and the exhaust rate of the vacuum pump according to the sensor data, maintain the set negative pressure value, form a dynamic vacuum state, and ensure the vacuum state while allowing the airflow in the freezing chamber 120 to circulate.

[0071] Then, it is heated by the heating element 800 to provide the heat required for sublimation. During heating, the heat is transferred to the air intake bend 320, which raises the temperature of the airflow discharged from the air intake bend 320. The airflow comes into direct contact with the rice noodles, improving the sublimation effect of the frost in the rice noodles.

[0072] During the freeze-drying process, when airflow is drawn from the suction hopper 230, the airflow drives the drive impeller 430 to rotate the drive shaft 410. The drive shaft 410 synchronously drives the drive bevel gear 420 to rotate, realizing the conversion and transmission of power. The driven bevel gear 560 follows the drive bevel gear 420 to rotate, and the driven bevel gear 560 synchronously drives the horizontal shaft 550 to rotate. The horizontal shaft 550 synchronously drives the sliding sleeve 540 to rotate, and the sliding sleeve 540 synchronously drives the ventilation tray 510 to rotate, so that the rice powder inside the ventilation tray 510 moves with the ventilation tray 510, so that the rice powder is fully in contact with the airflow and carries away the moisture that has been released from the rice powder. At the same time, the drive shaft 410 synchronously drives the elliptical disk 440 to rotate. When the elliptical disk 440 rotates, it drives the drive connecting rod 600 to move laterally left and right. The drive connecting rod 600 drives the ventilation tray 510 to move back and forth on the horizontal shaft 550 through the disk 541, changing the heating position and improving the sublimation efficiency.

[0073] In addition, when the airflow is blown out from the air supply nozzle 330, the airflow drives the driven impeller 720 to rotate. The rotating driven impeller 720 disperses the airflow, allowing the airflow to spread evenly into the freezing chamber 120 and come into contact with the rice flour. It can pass through the pores of the rice flour, causing the frost in the pores of the rice flour to sublimate quickly. Furthermore, the upward airflow can facilitate the discharge of moisture. Compared with the traditional static tray and freeze-drying structure, it can quickly remove the moisture generated during sublimation, improve freeze-drying efficiency, and achieve rapid freeze-drying.

[0074] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vacuum freeze-drying rice flour quick-freezing forming freezer, characterized in that, include: A refrigeration mechanism (100) includes a body (110), a refrigeration chamber (120), a working chamber (130), a rotating bracket (140), a sliding bracket (150), a refrigeration component (160), and an air inlet (170). The refrigeration chamber (120) is located on the upper part of the body (110), and the working chamber (130) is located on the lower part of the body (110). The rotating bracket (140) is installed on the rear wall of the inner cavity of the refrigeration chamber (120), and the sliding bracket (150) is installed on the rotating bracket (140). The refrigeration component (160) is installed on the rear wall of the inner cavity of the refrigeration chamber (120), and the air inlet (170) is located at the bottom of the refrigeration chamber (120) and communicates with the working chamber (130). A vacuum exhaust mechanism (200) is connected to the top of the freezing chamber (120); An intake mechanism (300) is connected to the intake port (170); A transmission mechanism (400) is disposed within the freezing chamber (120); The placement mechanism (500) is disposed on the rotating bracket (140) and connected to the transmission mechanism (400).

2. The vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 1, characterized in that, The vacuum exhaust mechanism (200) includes a vacuum pump (210), an extraction pipe (220), and an extraction bucket (230). The vacuum pump (210) is fixed on the top of the freezing chamber (120). The extraction end of the vacuum pump (210) is connected to the extraction pipe (220) that extends into the freezing chamber (120). An extraction bucket (230) is provided at the end of the extraction pipe (220).

3. The vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 1, characterized in that, The air intake mechanism (300) includes an air intake pipe (310), an air intake bend (320), an air supply nozzle (330), an air supply valve (340), an air filter box (350), and an air filter plate (360). The air intake pipe (310) is connected to the air intake interface (170). The upper end of the air intake pipe (310) is provided with an air intake bend (320) located at the bottom of the freezing chamber (120). The top of the air intake bend (320) is provided with evenly distributed air supply nozzles (330). The lower part of the air intake pipe (310) is provided with an air supply valve (340). The lower end of the air intake pipe (310) is connected to the air filter box (350). Evenly distributed air filter plates (360) are inserted into the air filter box (350).

4. The vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 2, characterized in that, The transmission mechanism (400) includes a transmission shaft (410), a transmission bevel gear (420), and a drive impeller (430). The transmission shaft (410) is rotatably connected to the freezing chamber (120) in the longitudinal direction. The transmission bevel gear (420) is provided on the transmission shaft (410), and the drive impeller (430) is provided at the upper end of the transmission shaft (410). The drive impeller (430) is located inside the suction hopper (230).

5. A vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 4, characterized in that, The placement mechanism (500) includes a placement ventilated tray (510), a cover plate (520), a placement groove (530), a sliding sleeve (540), a disc (541), a horizontal shaft (550), and a driven bevel gear (560). The cover plate (520) is hinged to the top of the ventilated tray (510). The placement groove (530) is provided inside the ventilated tray (510). Sliding sleeves (540) are provided at both the left and right ends of the ventilated tray (510). A disc (541) is provided on the sliding sleeve (540) at the left end. A horizontal shaft (550) is slidably connected inside the sliding sleeves (540) at both ends. The horizontal shaft (550) is rotatably connected to the rotating bracket (140). A driven bevel gear (560) that meshes with the transmission bevel gear (420) is provided on the horizontal shaft (550) at the left end.

6. The vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 5, characterized in that, An elliptical disk (440) is provided on the upper part of the drive shaft (410). A groove (450) is provided on the circumference of the elliptical disk (440). A transmission link (600) is connected between the groove (450) and the disk (541). The transmission link (600) is slidably connected to the sliding bracket (150).

7. A vacuum freeze-dried rice flour quick-freezing forming freezer according to claim 6, characterized in that, The transmission link (600) includes an L-shaped rod (610), a groove (620), and a slider (630). The L-shaped rod (610) is slidably connected to the sliding bracket (150). The lower end of the L-shaped rod (610) is provided with a groove (620) that is slidably connected to the disc (541), and the upper end of the L-shaped rod (610) is provided with a slider (630) that is slidably connected to the slide groove (450).

8. A vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 3, characterized in that, An air outlet component (700) is provided inside the air supply nozzle (330). The air outlet component (700) includes a wind shaft (710) and a driven impeller (720). The wind shaft (710) is rotatably connected inside the air supply nozzle (330), and the driven impeller (720) is provided on the top of the wind shaft (710).

9. A vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 1, characterized in that, The working chamber (130) has ventilation slots (180) on both sides, and dustproof mesh is installed in each ventilation slot (180).

10. A vacuum freeze-drying rice flour quick-freezing forming freezer according to claim 3, characterized in that, A heating element (800) is provided at the gap of the air intake bend (320).

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