190 results about "Quick freezing" patented technology

The invention discloses a rapid freezing device for abalone production and processing, and relates to the technical field of freezing, the rapid freezing device comprises an outer frame, a conveying assembly, a cooling assembly and a pre-cooling assembly, and rapid freezing of abalones is completed through cooperation of the conveying assembly, the cooling assembly and the pre-cooling assembly. Liquid nitrogen is sprayed to abalones conveyed on the conveying assembly through the annular cooling pipe and the nozzles so that the abalones can be quickly frozen through the liquid nitrogen, and the liquid nitrogen is stirred and disturbed through the cold air circulation mechanism so that it can be ensured that the liquid nitrogen makes full contact with the abalones in multiple directions and freezes the abalones; the tail end of the annular cooling pipe is communicated with the pre-cooling pipe through the arranged connecting pipe, so that residual liquid nitrogen in the annular cooling pipe is conveyed to the pre-cooling area, the pre-cooling pipe sprays the residual liquid nitrogen conveyed into the pre-cooling pipe from the air spraying groove to the abalones just entering the outer frame, and therefore the residual liquid nitrogen is used for pre-freezing the abalones; the freezing speed of the abalones is accelerated.

The invention relates to the technical field of food spiral instant freezer feeding, in particular to a feeding conveying structure of a food processing spiral instant freezer, which comprises a conveying frame, the upper side of the conveying frame is fixedly provided with a lifting frame, the upper side of the lifting frame is fixedly provided with a discharging box, and one side of the discharging box is provided with a blanking channel; a material distribution assembly is rotationally installed in the material falling channel, and a guide box is fixedly installed on the upper side of the material discharging box. According to the feeding device, a material distribution motor drives a driving shaft to rotate, the driving shaft drives a rotating rod to rotate, the rotating rod drives a driving rod to rotate, the driving rod drives a reciprocating driving strip to move up and down in a reciprocating mode, and a material distribution groove which is not filled is close to a feeding port and is matched with a discharging soft cushion for filling; and the to-be-frozen food falls onto the conveying belt to be uniformly distributed, so that the sticking condition caused by stacking during quick freezing is prevented.

The present invention discloses a composite method for high-quality quick freezing and high-recovery thawing of oily fresh fish, which belongs to the technical field of food freezing and processing. The present invention uses oily fresh fish as the main raw material, and undergoes raw material preparation, physical field assisted freezing and high-recovery thawing processes. In this method, rosemary extract and gallic acid are added in the raw material preparation stage and assisted by the effect of electrostatic field, so as to delay the fat oxidation of oily fresh fish. At the same time, ultrasonic and magnetic field combined immersion freezing, microwave combined with nano zinc oxide and graphene particles thawing can minimize the quality loss of fresh samples after freezing and thawing, thereby achieving high-quality freezing and high-recovery thawing. After using the above-mentioned treatment, the quality of subsequent fresh fish is significantly improved, such as reducing thawing loss, retaining nutrients, improving sensory quality, delaying fat oxidation, high recovery, etc., and extending the sales period to achieve the purpose of increasing revenue.

The application provides a kind of fish ball production freezing equipment, belongs to fish ball processing equipment technical field, it solves the technical problems such as low degree of automation of existing fish ball freezing equipment, insufficient distribution accuracy, poor freezing effect etc. Including feeding mechanism, distribution mechanism, mobile conveyor, preliminary conveyor, transfer conveyor, quick freezing assembly, tunnel freezer, cold air generator and several tray assemblies, the push plate assembly is arranged on the end of the preliminary conveyor close to the mobile conveyor, the quick freezing assembly is located above the mobile conveyor, and the quick freezing assembly is located between the preliminary conveyor and the tunnel freezer, the quick freezing assembly is communicated with the cold air generator, and several tray assemblies are placed on the preliminary conveyor. The application can realize the full-automatic circulation of fish balls, accurate distribution and efficient and uniform freezing, and the processes are closely connected, which can meet the quality and capacity requirements of large-scale production of fish balls and similar pellet products.

The utility model is applicable to the technical field of quick freezing of fish ball products, and provides quick freezing equipment for fish ball products, which comprises a main box body, a movable support, a storage tank, a driving chamber, a first driving structure, a second driving structure, a freezing chamber and a water storage chamber are arranged in the main box body, the movable support is arranged in the main box body, the storage tank is arranged in the main box body, and the first driving structure is arranged in the main box body. The driving chamber is arranged at the side end of the main box body, the first driving structure is arranged in the driving chamber, the second driving structure is arranged in the movable support, and the freezing chamber and the water storage chamber are symmetrically arranged in the main box body. The fish ball quick-freezing device solves the technical problem that the fish ball quick-freezing device cannot completely filter water, the water filtering device is not directly communicated with the freezing chamber, so that water cannot flow into the freezing chamber due to blockage of the filtering holes to freeze the conveying belt during filtering, in addition, the fish ball quick-freezing device is further provided with a fan, and the cooling effect is good. The fish balls can be primarily cooled, and evaporation of water can be accelerated, so that the refrigeration efficiency is improved.

The utility model relates to a layered distribution vacuum freeze dryer, the working principle of the freeze dryer is mainly based on three steps of pre-freezing, sublimation and analysis, a pre-freezing bin receives cold air of a refrigerating main machine of a refrigerating machine through a bin main body to quickly freeze a to-be-dried substance at low temperature to form solid ice crystals, and a layered drying pipe can depend on a vacuum device, so that the drying efficiency is improved. A vacuum environment is formed in an inner cavity of the layered drying pipe, under the vacuum environment and the temperature monitoring of a temperature sensor, a heater enables a heating wire to conduct heating, ice crystals directly sublimate into water vapor instead of passing through a liquid state, the temperature in the layered drying pipe is further increased, and a small amount of water combined on the surface of a substance is removed; the layered drying pipe adopts a step-by-step vacuumizing mode, so that the defect that the traditional vacuum freeze drying equipment is relatively high in energy consumption is overcome.

The invention discloses an instant freezer with an automatic bamboo shoot length sorting function, and relates to the technical field of bamboo shoot sorting and quick freezing. The instant freezer comprises a conveying room, a feeding belt is arranged at the upper end in the conveying room, a quick freezing room is fixedly connected to one side of the conveying room, and a quick freezing belt is arranged at the bottom of the quick freezing room; the instant freezer with the automatic bamboo shoot length sorting function comprises an auxiliary quick-freezing mechanism and a material processing mechanism, the auxiliary quick-freezing mechanism is arranged in the material processing mechanism, through arrangement of protruding blocks, when bamboo shoots are put in a material collecting groove body in a swinging mode, the two protruding blocks abut against each other to generate fluctuation, then an auxiliary box is driven to vibrate, and the bamboo shoots are put in the auxiliary box. The auxiliary box is prevented from being blocked when the bamboo shoots are conveyed, it can be further guaranteed that the bamboo shoots are evenly distributed on the quick-freezing belt under the vibration effect, the even quick-freezing process can be achieved, blocking is avoided, the downtime in the production process can be shortened, normal operation of a production line is guaranteed, and the production efficiency and the yield are improved.

The utility model discloses a kind of pigskin jelly quick freezing forming temperature control equipment, belong to quick freezing temperature control equipment technical field, including refrigerator, the inner wall of refrigerator is fixedly connected with column and guide shaft;Mesh plate, the mesh plate is fixedly connected between column, and the upper of mesh plate is placed with mould basin;Supporting assembly, the supporting assembly includes cross bar, the inner wall of both ends of cross bar is fixedly connected with sliding sleeve, and sliding sleeve is slidably sleeved in the outside of guide shaft, the outer wall of cross bar is fixedly connected with positioning rod, the top of the most upper supporting assembly is connected with the jacking end of electric push rod. Through upper die assembly can be covered to mould basin Protection, to be contacted with pigskin jelly upper surface by lower silica gel plate and pigskin jelly and be pressed tightly, avoid its bubble generation in forming process, cause its volume increase, ensure the compactness after pigskin jelly forming, improve its edible taste, avoid pigskin jelly surface bare simultaneously leading to dry metamorphism.

The utility model discloses a food sectional type liquid nitrogen quick-freezing tunnel structure which comprises a first liquid nitrogen quick-freezing tunnel and a second liquid nitrogen quick-freezing tunnel, and a feeding port and a discharging port are formed in the two ends of the first liquid nitrogen quick-freezing tunnel and the two ends of the second liquid nitrogen quick-freezing tunnel respectively. And a conveying assembly is arranged between the discharge port of the first liquid nitrogen quick-freezing tunnel and the feed port of the second liquid nitrogen quick-freezing tunnel. According to the Fotiaoqiang soup quick-freezing device, a container containing Fotiaoqiang soup is put in from the feeding port of the first liquid nitrogen quick-freezing tunnel, quick-freezing is conducted through the first liquid nitrogen quick-freezing tunnel, the quick-frozen Fotiaoqiang is discharged from the discharging port of the first liquid nitrogen quick-freezing tunnel, and then the Fotiaoqiang is conveyed to the direction of the second quick-freezing tunnel through the conveying assembly; a feeding assembly arranged above the conveying assembly is used for adding dry substances of Fotiaoqiang into the container, the Fotiaoqiang after the dry substances are added enters the second quick-freezing tunnel for quick-freezing, and after quick-freezing is completed, separation and quick-freezing of soup and solid substances of the Fotiaoqiang are achieved.

The utility model is suitable for the technical field of freezing equipment, and provides tunnel type variable-frequency variable-voltage rod electrode array coupling liquid nitrogen freezing equipment which comprises a freezing tunnel and a conveying belt penetrating through the interior of the freezing tunnel. An electric field device is further arranged in the freezing tunnel, the electric field device comprises an electric field generator, a frequency converter and a plurality of rod electrodes, and the rod electrodes are uniformly distributed in the freezing tunnel; the electric field generator is electrically connected with a plurality of frequency converters arranged in the freezing tunnel, so that an electric field is uniformly distributed in the freezing tunnel; a liquid nitrogen spraying device is further arranged in the freezing tunnel, and the liquid nitrogen spraying device is used for spraying liquid nitrogen. The quick freezing device is high in applicability and can be used for quickly freezing various fresh meat such as fish meat, livestock meat and poultry meat; and meanwhile, the controllability is high, and parameters such as frequency, voltage and freezing rate can be adjusted.

The invention discloses a water disintegration type babylonia compound feed and a preparation method thereof. The compound feed comprises the following raw materials: 30-40 parts of minced fish; 20-30 parts of fish meal; 5 to 15 parts of a freshener; 5-8 parts of a bonding modifier; 1-3 parts of a disintegration regulator; 1-1.5 parts of an emulsifier; 0.1 to 0.2 part of a phagostimulant; 0.01 to 0.02 part of an antioxidant; the preparation method comprises the following steps: preparing raw materials, carrying out light heat treatment, chopping and emulsifying, forming and granulating, quick-freezing and shaping, and packaging and storing, by optimizing the proportion of the components, adopting light heat treatment and combining a low-temperature quick-freezing process, the feed granules are naturally disintegrated into mud after being put into water for 5-15 minutes, the feed coefficient reaches 1.6-1.8, the residual feed rate is less than 5%, and the nutritional supplement is added into the feed granules. The survival rate can reach 90% or above, compared with chilled trash fish feeding, the residual feed reduces the ammonia nitrogen generation amount in water by 50-60%, and the method is suitable for large-scale application and popularization.

The present application relates to a kind of quick freezing device.For reducing the liquid nitrogen overflow amount of prior art tunnel type liquid nitrogen quick freezer, the present application provides a kind of tunnel type liquid nitrogen quick freezer, including tunnel type box, transport chain is arranged in the box, multiple rows, multiple columns diffusion fan are arranged along the box top direction in the top of the box, the air outlet of fan is located in the top of the box, liquid nitrogen spray pipe is arranged in the top of the box, it is characterized in that: multiple guide plates extending to the middle of the box are arranged along the box wall direction on the two side walls in the box, one end of guide plate is fixed with the box wall, the spacing between two guide plates on the same side wall at least spans one fan;Guide plate lower edge exceeds the lower edge of fan air outlet.This quick freezer effectively reduces the diffusion amount of overflow channel formed by liquid nitrogen along the side wall of the box to input end and output end, thereby reducing the use amount of liquid nitrogen, achieves the technical effect of cost saving, environmental protection.

The application discloses a method for preparing and removing odor of Hirudo nipponia freeze-dried powder, and the method comprises the following steps: inducing clean treatment in an empty stomach, low-temperature stress pretreatment, in-situ quick freezing under the protection of inert gas, segmented vacuum freeze-drying and low-temperature airflow crushing. The application induces the expression up-regulation of aldehyde dehydrogenase and alcohol dehydrogenase in the body of Hirudo nipponia through low-temperature stress, and utilizes ice crystals to destroy cell compartmentalization in in-situ quick freezing, so that the enzymes and their substrates are contacted, in-situ enzymatic conversion occurs under the protection of inert gas, and fishy components are degraded into low-smell metabolites. The application does not need exogenous odor-removing substances and post-processing procedures, has high antithrombin activity retention rate, greatly reduces the total amount of fishy substances, and realizes in-situ synergistic odor removal in the whole freeze-drying process.

This work innovatively realizes the effective regulation of the crystalline / amorphous crystal surface by subjecting the phosphide to low-temperature liquid nitrogen quick freezing treatment, and prepares a thin-sheet CoO x / CoP-L catalyst and its preparation method, the preparation method is simple to operate, low cost, and has better economic benefits. x The crystalline / amorphous heterogeneous interface formed by the CoP-L flakes effectively promotes the adsorption and desorption of water during hydrogen evolution, while the lattice distortion optimizes the CoO x The electronic structure of / CoP‑L ultimately achieves improved performance and exhibits excellent performance in hydrogen evolution reactions in both alkaline and acidic media. Under alkaline and acidic conditions, only 56.6mV and 98mV overpotentials are required, respectively, to drive 10mA cm ‑2 It is worth noting that the alkaline HER process has a current density of 68 mA cm ‑2 The catalytic activity begins to exceed that of commercial Pt / C electrode, showing excellent catalytic potential.

The utility model relates to the technical field of food quick freezing, in particular to a multi-layer continuous tunnel instant freezer which comprises a heat preservation shell and a quick freezing channel arranged in the heat preservation shell, a feeding port and a discharging port which are communicated with the quick freezing channel are formed in the two ends of the heat preservation shell respectively, a feeding frame is fixedly installed at the position of the feeding port, and a discharging frame is fixedly installed at the position of the discharging port. A discharge frame is fixedly mounted at the discharge hole; by arranging the multi-layer conveying net belt structure, materials can be conveyed in the heat preservation shell in a falling and reciprocating mode, the internal environment of the heat preservation shell is fully utilized, and the space utilization rate is effectively increased; by arranging the connecting pipe, the air supply box and the exhaust pipe, a closed cold air conveying channel is formed between the air outlet of the fan and the conveying net belt, the energy loss of cold air in the flowing process is effectively reduced, and the freezing efficiency is remarkably improved; and by arranging the flushing pipe, the defrosting water tank and the water supply pump, the automatic defrosting function is achieved, the trouble of manual shutdown cleaning is avoided, and the production efficiency is further improved.

The utility model relates to a double-spiral instant freezer for quick freezing of large food, which belongs to the field of instant freezers and comprises a mounting frame, a double-spiral instant freezer body mounted on the inner side of the mounting frame and a cooling device mounted on the inner top wall of the mounting frame, and a conveying structure for conveying cold air is arranged on the inner bottom wall of the mounting frame. The conveying structure comprises an auxiliary box fixedly connected to the inner bottom wall of the mounting frame, an air pump fixedly connected to the upper surface of the auxiliary box, an air suction pipe fixedly connected to the air suction end of the air pump, an air outlet pipe fixedly connected to the air outlet end of the air pump and an air spraying pipe fixedly connected to the other end of the air outlet pipe. A filtering assembly used for filtering cold air is arranged on the inner side of the auxiliary box. According to the double-helix instant freezer for quick freezing of the large food, small particles are effectively blocked and captured through the cooling assembly and are prevented from entering the instant freezer along with cold air, so that pollution to the surface of the food is avoided, and the purity and high quality of the food are ensured.

The embodiment of the invention provides a refrigerating system and a control method thereof, a controller, a storage medium and a program product, the refrigerating system comprises a compressor, a condenser, an evaporator, a heat exchange repeater and a valve assembly, the heat exchange repeater comprises a first coil pipe, a second coil pipe and a third coil pipe, and the first coil pipe, the second coil pipe and the third coil pipe are arranged side by side and wound around a box body; the valve assembly is provided with a valve inlet, a first valve outlet and a second valve outlet, an outlet of the condenser is communicated to the valve inlet through a first coil pipe, the first valve outlet is communicated to an air return port of the compressor through a second coil pipe, and the second valve outlet is communicated to the air return port of the compressor sequentially through the evaporator and a third coil pipe. According to the embodiment of the invention, the air-cooling and direct-cooling coupled multi-mode adjustable refrigerating system is constructed based on the double-suction compressor, multi-mode operation mechanisms such as air-cooling quick freezing, direct-cooling heat preservation, inner wall frost prevention and non-stop defrosting can be achieved, and multiple effects such as deep cooling, quick freezing, temperature uniformizing and energy saving are achieved.

The invention belongs to the technical field of agricultural product fine processing, and particularly discloses a hop freshness locking system and method based on stepped quick freezing and low-temperature crushing, the system comprises a picking treatment module, a pre-cooling module, a low-temperature crushing module and a packaging cryopreservation module, the picking treatment module comprises a picking vehicle, a fruit-removing magnetic-separation impurity-removing machine and a mixing pool; the pre-cooling module comprises a first low-temperature workshop, and a conveying belt and an industrial air cooler are arranged in the first low-temperature workshop. The low-temperature crushing module comprises a low-temperature workshop II; a crusher and a mixer are arranged in the low-temperature workshop II; the packaging and cryopreservation module comprises a third low-temperature workshop and a refrigerating chamber. A quantitative packaging machine, a primary vacuumizing device, a nitrogen making machine, a secondary vacuumizing device and a sealing packaging machine are arranged in the third low-temperature workshop. Through stepped quick freezing and a whole-course low-temperature environment, the heat damage and oxidation speed in the processing process are greatly reduced, the shelf life is prolonged, and the batch consistency of products is ensured.

The invention belongs to the technical field of freezing equipment, in particular to quick freezing equipment with temperature control, and provides the following scheme that the quick freezing equipment specifically comprises a freezing box body, a cold source unit is arranged at one end of the freezing box body, a box door is arranged at the other end of the freezing box body, and a supporting net rack is mounted at the bottom of the freezing box body; and a main air duct mechanism connected with a cold air outlet of the cold source unit is fixedly mounted at the top end in the freezing box body. After the upper cold distribution mechanism descends to an area needing quick freezing, the air distribution mechanism introduces cold air in the auxiliary air duct, local temperature is lowered in a targeted mode, the upper cold distribution mechanism approaches the surface of an object for contact cooling, the speed of the cold air surrounding the surface of a new object is increased, and then the cooling speed of the area is increased; the quick-freezing operation of newly added articles is achieved, the cold air flow of other areas does not need to be changed, the influence on the cold air flow of other areas is reduced, and the stability of temperature control in the freezing equipment is improved.

The utility model discloses a cow rear part quick freezing device which comprises a quick freezing box, a flow dividing groove is fixedly connected to the upper surface of the interior of the quick freezing box, evenly-distributed nozzles are fixedly connected to the lower surface of the flow dividing groove, and the cow rear part quick freezing device further comprises a transmission mechanism. The transmission mechanism comprises a rotating disc, rotating rods, gears and an inner gear ring, the rotating disc is rotationally connected to the right surface in the quick-freezing box, the rotating rods which are evenly distributed are rotationally connected to the interior of the rotating disc, the gears are fixedly connected to the right sides of the outer surfaces of the rotating rods, the inner gear ring is fixedly connected to the right surface in the quick-freezing box, and the gears are connected with the inner gear ring in an engaged mode; the front surface of the quick-freezing box is fixedly connected with a control switch group, and according to the quick-freezing device for the rear part of the cattle, meat products at the rear part of the cattle can rotate while rotating, and the meat products at the rear part of the cattle can be uniformly and quickly frozen without manually turning over the meat products at the rear part of the cattle in cooperation with liquid nitrogen sprayed out by a nozzle.

The application provides a kind of quick freezing device based on konjak product, including tunnel freezer body, also including ice bridge generation seat and electric field guide rail;The application realizes the controllable adhesion between the adjacent konjak tofu sides and corners during quick freezing by the multifunctional integrated design of ice bridge generation seat and electric field guide rail, forms the overall structure similar to "stamp unit", which is convenient for batch forming and automatic handling, and also makes consumers easily break apart;At the same time, the arc-shaped demolding rod on the electric field guide rail mechanically triggers the outward movement of the side baffle and links the piston exhaust jet, realizes the double soft demolding of mechanical drawing and airflow injection, effectively avoids product damage;At the same time, the electric field guide rail is reused as parallel electrodes to apply alternating electric field, promote the formation of small ice crystals, combined with the segmented temperature zone design of the pre-cooling zone and quick-freezing zone of the tunnel freezer body, significantly reduces the juice loss rate after thawing and maintains the Q elastic taste.

The invention relates to a preparation method of nanofiber freeze-dried aerogel, which comprises the following steps: 1) mixing pure water and an organic solvent mutually soluble with water in proportion to obtain a mixed solvent, and adding polysaccharide powder into the mixed solvent for dissolving or dispersing to obtain a polysaccharide solution; (2) pre-freezing or directionally freezing the polysaccharide solution to form a uniform freezing front edge, and then immersing a pre-frozen or directionally-frozen sample into liquid nitrogen to be quickly frozen so as to lock a nanophase separation structure in the freezing process and form a nanofiber precursor network; 3) freeze-drying the sample obtained in the step 2) under a vacuum condition to obtain the nanofiber polysaccharide aerogel. Compared with pure water solvent freeze-dried aerogel, the mixed solvent freeze-dried aerogel prepared by the method has lower thermal conductivity and a finer nanofiber aperture structure, and has obvious advantages.

The application discloses a kind of aquatic processing liquid nitrogen freezing equipment, it is related to aquatic freezing field, including freezer, liquid nitrogen storage room and aquatic freezing chamber are equipped in freezer inside, multiple groups of partition cooling mechanism are installed from top to bottom in aquatic freezing chamber inside, partition cooling mechanism includes main plate and control guide plate, inner cavity is equipped in main plate inside, control guide plate is movably assembled in inner cavity, liquid nitrogen flow cavity for liquid nitrogen flow is equipped in control guide plate inside, outer guide hole is opened in the surface of main plate, inner guide hole is opened in the surface of control guide plate, control guide plate can move horizontally in inner cavity.The application is set by partition cooling mechanism in aquatic freezing chamber, aquatic freezing chamber can be divided into multiple areas by partition cooling mechanism, so that when aquatic fills entire aquatic freezing chamber, by the distribution of partition cooling mechanism, liquid nitrogen can be evenly flowed into aquatic in each area, so that the effect of uniform and rapid freezing is realized, and the quality of aquatic freezing is guaranteed.

The invention relates to the technical field of industrial data control, in particular to an energy-saving regulation and control method and regulation and control equipment for an instant freezer of a prefabricated vegetable production line, and the energy-saving regulation and control method comprises the following steps: acquiring speed data, temperature data and weight data on a conveyor belt of an instant freezer in the prefabricated vegetable production line; the temperature fluctuation degree is obtained, and a temperature space uniformity index is obtained by combining the difference and the change trend of the temperature fluctuation degree between different monitoring positions; the distribution density of the prefabricated dishes is analyzed according to the weight data in the monitoring time period of each moment, and an effect evaluation value is obtained in combination with the speed data and the temperature space uniformity index; according to the change trend of the effect evaluation value of the monitoring time period at each moment, the cooling sufficiency condition of the prefabricated dishes is analyzed to obtain cooling demand indexes; and according to the cooling demand index and the time interval between each moment and the current moment, weighting the temperature data to obtain an energy-saving regulation and control strategy of the instant freezer at the current moment. The refrigeration strategy can be dynamically adjusted, and resource waste is avoided.

The utility model discloses a quick-freezing device for garlic bulbs, which is applied to the field of food. Comprising a pre-cooling tank, a quick-freezing tank and a waiting tank. An inner tank body of the quick-freezing tank is divided into a quick-freezing chamber and a uniform cooling chamber which are communicated left and right, freezing liquid is contained in the quick-freezing chamber, and a communication opening in the side portion is communicated with the uniform cooling chamber. The quick-freezing chamber is connected with the pre-cooling tank through a freezing tank inlet valve, and the uniform cooling chamber is connected with the waiting tank through a freezing tank outlet valve. And a lifting and discharging mechanism is arranged in the quick-freezing chamber. According to the utility model, through the pre-cooling tank, the quick-freezing chamber and the uniform-cooling chamber, the quick freezing of garlic is realized, the lifting and discharging mechanism intermittently receives and discharges materials, and the intermittent continuous operation of the freezing of garlic bulbs is realized.

The invention discloses an efficient circulating air control device for quick freezing of food materials, and relates to the technical field of quick freezing of the food materials, the efficient circulating air control device comprises a base, a dispenser is fixedly connected to the top surface of the base, two first supporting plates are fixedly connected to the top surface of the base, a conveying belt is in transmission connection between the two first supporting plates, and a quick freezer is fixedly connected to the top surface of the base; an auxiliary quick-freezing mechanism for assisting quick freezing of food materials is arranged on the top face of the inner wall of the quick-freezing device, an auxiliary filtering mechanism for quickly replacing a filtering medium is arranged on the top face of the quick-freezing device, the auxiliary quick-freezing mechanism can roll the surfaces of the food materials to adsorb moisture on the surfaces of the food materials, the moisture of the food materials is reduced, and the freezing speed can be increased; the damage of ice crystals to food material cells is reduced, so that the quality and taste of food materials are better maintained, the mode that the auxiliary filtering mechanism can push a filtering medium through a T-shaped push rod is relatively simple, complex disassembly steps are not needed, and the complexity and difficulty of operation can be reduced.

The invention provides a preparation method of frozen instant fruits, which comprises the following steps: A) blanching fresh fruits, and pre-freezing to obtain pre-frozen fruits; b) performing graded freeze drying on the pre-frozen fruits, and removing 10-50% of moisture in the fresh fruits to obtain freeze-dried fresh-locked fruits; and C) freezing and storing the freeze-dried and fresh-locked fruits to obtain the frozen instant fruits. According to the invention, the pain points of traditional freeze-dried fruits and direct frozen fruits are solved, and the internal structure of the fruits is optimized through an ultralow-temperature pre-freezing and vacuum freeze-drying technology. Tiny ice crystals are generated in the fruits through ultralow-temperature quick freezing, the ice crystals sublimate in the drying process, and the interiors of the fruits are loosened. By adjusting the drying process, partial moisture of the fruits is removed, and the taste of the fruits is optimized.

According to the healthy and safe square bamboo shoot preservation method, an efficient and low-consumption square bamboo shoot preservation system is formed by improving an existing preservation technology, a microwave-hot water combined enzyme deactivation technology, a tea polyphenol color protection technology and a gradient liquid nitrogen quick freezing technology are adopted, the retention rate of vitamin C is increased, the difference between the crispness of unfrozen square bamboo shoots and the crispness of fresh bamboo shoots is smaller, and the browning rate is lower. Ultrasonic cleaning is combined with nano modified atmosphere packaging, so that the total number of bacterial colonies can be reduced, and the shelf life can be prolonged; through high-voltage pulse electric field pretreatment and magnetic field assisted freezing storage, the diameter of ice crystals is reduced to below 20 microns, and mechanical damage of the ice crystals to cell structures during quick freezing and unfreezing is reduced, so that it is ensured that the difference between unfrozen frozen products and fresh bamboo shoots is not too large, and the whole-chain quality guarantee from harvesting, processing to storage and transportation is achieved; the method is suitable for development of high-added-value products such as instant food and premade dishes, and promotes the square bamboo shoot industry to be upgraded to standardization and high-end.

The invention discloses a straw mushroom fresh-keeping transportation method based on a quick-freezing fresh-returning synergistic effect, which is characterized by comprising the following steps: S1, pre-cooling straw mushrooms with unbroken pellicle and pileus diameter of 2-3cm to inhibit breathing heat; s2, the pre-cooled straw mushrooms are taken out of the soaking solution, and the straw mushrooms are air-dried through cold air, so that a protective film is formed on the surfaces of the straw mushrooms through the dried solution; s3, quickly freezing the volvariella volvacea treated in the step S2 in stages until the diameter of ice crystals on the surface of the volvariella volvacea is less than or equal to S4, putting the volvariella volvacea treated in the step S3 into a constant-temperature warehouse to promote the volvariella volvacea to complete cell dehydration and dormancy; and S5, packaging the volvariella volvacea processed in the step S4, and then transporting by using a cold chain. According to the method, the preservation effect of the straw mushrooms can be remarkably improved, the method has the advantages of being easy and convenient to operate, low in cost, high in practicability and the like, the preservation effect advantage is obvious, then the transportation radius of the straw mushrooms is expanded to 1500 km from 300 km, and the loss rate is reduced to 6.7% from 35%.