246 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 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.

The invention discloses a food freezing system based on electrode coupling and a multi-stage electric field and a freezing method thereof. The system comprises an electric field generating device (1), a refrigeration house (2), a space plate type discharge electrode (3), a metal frame discharge electrode (4) and the like. According to the freezing method, a discharge electrode is used for being coupled with an electric field, a special'superposed electric field effect 'is generated, the freezing efficiency is remarkably improved, heat conduction inside and on the surface of food can be accelerated, uniform and rapid crystallization of water is promoted, large ice crystals are effectively prevented from being formed, and therefore damage to cell structures is reduced. Compared with a traditional freezing method, the freezing time can be shortened by 15%-30%, and the juice loss rate is reduced by 3%-6%. Due to the synergistic effect of the double electric fields in different stages, the food can be quickly frozen under lower voltage, and the comprehensive energy consumption can be reduced by 15-30% while the safety is ensured. The method is suitable for large-scale food freezing application, and remarkable technical progress and economic benefits can be brought to the food freezing industry.

The invention discloses freezing equipment for a processing technology of soft boiled abalones and a use method of the freezing equipment, and belongs to the technical field of freezing processing of abalones. Comprising a gasification type liquid nitrogen refrigerator, an electric valve sleeve, an electric adsorption module, a first electric telescopic rod and a semi-fan-shaped storage tank, the gasification type liquid nitrogen refrigerator is combined with a non-direct-contact freezing mode, and a traditional liquid nitrogen quick freezing method is adopted, so that the surfaces of abalones are quickly frozen, the internal temperature is slowly reduced, and the internal and external temperature difference is too large; the cell structure is destroyed. Compared with the prior art, the abalones are indirectly cooled by low-temperature gas, so that the problem that the surfaces of the abalones are frozen too quickly is avoided, and the temperature change of the whole abalones in the freezing process is more consistent. In addition, by injecting an antifreeze agent or a protective agent into the abalone, the formation of large ice crystals can be effectively reduced, and the fine structure in the abalone can be maintained. Therefore, the elasticity and the taste after unfreezing are enhanced, and the risk of texture damage caused by non-uniform freezing is greatly reduced.

The present invention is directed to a method for combining dehydrofreezing and medium to far spectrum infrared radiation to preserve biological material. IR transfers energy and penetrates food products, thereby removing naturally present moisture. The present invention provides a novel method of combining pH treatment, infrared radiation, freezing, and vacuum-sealing for preserving biological material. Biological materials are preserved through either a pH treatment or with heat to remove harmful pathogens, followed by processing using far spectrum infrared radiation which may be powered by either gas or electric means. The processed materials undergo a freezing process which may be done using Individual Quick Freezing or blast freezing methods The frozen processed material is then packaged via vacuum sealing.

The utility model relates to an ice-making structure of a vehicle-mounted refrigerator, the vehicle-mounted refrigerator comprises a refrigeration box body and an ice-making box body, an ice-making mechanism is arranged in the ice-making box body, the ice-making mechanism comprises an ice-making cavity, an ice storage cavity and a water storage tank, the ice-making cavity and the ice storage cavity are located above the water storage tank, an ice-making device is arranged in the ice-making cavity, the ice-making device comprises an ice-making water tank and an ice-making mold, and the ice-making mold is located above the ice-making water tank. A refrigerating pipe and a heating pipe are connected in the ice making mold; the refrigerating box body is additionally arranged, the outdoor ice using requirement of people can be met, the refrigerating pipe is arranged on the ice making mold for quick freezing, the heating pipe is used for separating ice blocks from the ice making mold, ice making and ice block collecting are automatically completed, the rotating motor drives the ice making water tank to turn over, the ice blocks are conveyed to the connecting pressing plate and the ice block pushing plate and then pushed into the ice storage cavity, and the ice making effect is achieved. Ice blocks can be automatically manufactured and collected, the water leakage holes, the water outlet pipe, the water pump and the water supply pipe circularly supply water, water in all the processes is collected, cyclic utilization of the water is achieved, waste of the water is reduced, and the water using efficiency is improved.

The invention provides a preparation method and application of a brain tissue rapid frozen section. The preparation method comprises the following steps: (1) embedding a pretreated frozen tissue sample into a pre-cooled OCT (Optical Coherence Tomography) for freeze drying; (2) transferring the freeze-dried tissue sample in the step (1) into an embedding box containing a pre-cooled OCT (Optical Coherence Tomography), and completely immersing the tissue sample into the OCT; (3) putting the embedding box in the step (2) into an embedding container containing precooled refrigerating fluid and dry ice; and immersing the embedding box into a refrigerating fluid, performing quick freezing, and slicing after quick freezing to obtain the brain tissue quick freezing section. The preparation method is short in time consumption, generation of ice crystals is remarkably reduced, the phenomenon of slice falling caused by bubbles in the embedding blocks in slices is effectively prevented, tissue frost cracking is avoided, and the slice quality is improved.

The invention provides a processing method for improving the quality of chicken prefabricated prepared food, which mainly integrates injection pickling, low-temperature rolling, active matter coating preservation, vacuum packaging and liquid nitrogen quick-freezing processes, so that the quality of prepared chicken cutlets during storage, transportation and frozen storage is ensured. The method comprises the following steps: injecting marinade into chicken in an injection manner, performing low-temperature vacuum rolling, kneading and pickling after injection, and performing film coating and fresh keeping through a fresh-keeping solution after pickling is finished, and finally, packaging, putting into a liquid nitrogen tunnel instant freezer, controlling the time to be 10-20 minutes at the temperature of-80 to-100 DEG C, and rapidly cooling to-20 DEG C or below. Through injection pickling and low-temperature rolling, the loss of original juice of the chicken cutlet can be effectively reduced, and the initial texture characteristics of the chicken cutlet are maintained; active matter coating preservation plays a role in inhibiting bacteria and resisting oxidation; through combination of vacuum packaging and liquid nitrogen quick freezing, surface moisture drying consumption and large-particle ice crystal formation during chicken cutlet freezing can be reduced, so that the water binding capacity, texture characteristics and freshness of the prefabricated chicken cutlet are kept for a long time.

The utility model relates to a liquid nitrogen quick-freezing device which comprises a cabinet body, a storage assembly, a jacking assembly, a liquid nitrogen assembly and an exhaust assembly. The cabinet body is provided with a containing groove which is used for containing the storage assembly. The storage assembly comprises a storage rack and a tray; the storage rack is vertically provided with a storage plate, the tray is arranged on the storage plate, and a plurality of first air holes are formed in the tray; the jacking assembly is fixedly connected with the cabinet body, and the jacking assembly is used for penetrating through the first air hole to jack food; the liquid nitrogen assembly is externally connected with liquid nitrogen supply equipment and used for spraying liquid nitrogen into the containing groove. The exhaust assembly is used for exhausting gas in the containing groove. According to the food tray, the liquid nitrogen assembly sprays liquid nitrogen into the containing groove, and the liquid nitrogen is gasified to absorb heat so as to quickly freeze food on the tray; the jacking assembly penetrates through the first air holes of the tray and then jacks the food, so that the lower surface of the food is separated from the tray, or the food is jacked and moved, and therefore the freezing speed of the lower surface of the food is increased, and the food freezing uniformity is improved.

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 quick-freezing warehouse comprises a warehouse body, a goods shelf trolley, a heat exchanger and an axial flow fan are arranged in the warehouse body, the axial flow fan sucks low-temperature airflow of the heat exchanger and forcibly conveys the low-temperature airflow to an air inducing device, and the high-pressure low-temperature airflow vertically enters an air guiding device after the airflow direction is changed through the air inducing device. Horizontal airflow guided layer by layer through the air guiding device enters the air guiding grating, the air guiding grating is arranged in a modularized mode, and low-temperature airflow blown out of the air guiding grating is evenly blown to each layer of frozen products on the goods shelf trolley. According to the utility model, the air duct system of the quick-freezing storage is optimized, so that frozen products in the storage are uniformly blown, the freezing time is shortened, and the energy consumption is reduced; products of different specifications can be frozen at the same time and can be independently adjusted in different areas. According to the utility model, small-batch quick freezing can be realized, when small-batch goods are warehoused, the grating plates in other areas are closed, centralized blowing heat exchange is carried out on the goods placing area, the local air volume is improved, and the freezing time is shortened.

The invention relates to the technical field of building material detection, and discloses a waterproof roll rapid detection method and device, and the method comprises the following steps: S1, cutting a waterproof roll into a standard test piece, and fixing the standard test piece to a feeding module; s2, starting a feeding module, and conveying the test piece to a freezing module; s3, reducing the temperature in the freezing module to a target temperature through a semiconductor refrigeration technology, and keeping the temperature stable; s4, after freezing is completed, the test piece is conveyed to a bending test module; s5, performing a bending test on the test piece in the bending test module, and detecting whether cracks appear on the surface or not; and S6, recording detection data and generating a report. Through the rapid freezing module based on semiconductor refrigeration, the environment temperature can be reduced to-25 DEG C to-40 DEG C in a short time, low-temperature stability is kept through the precise temperature control system, the problem that in the prior art, refrigeration and cooling of a compressor are slow is solved, the detection time is greatly shortened, the efficiency is improved, and the rapid sampling inspection requirement of a construction site is met.

The invention belongs to but is not limited to the technical field of agricultural product storage, and discloses a mutton quality improving and gradient processing storage method which comprises the steps of cold storage, ice temperature and freezing storage. A modified atmosphere fresh-keeping packaging method; applying a natural biological fresh-keeping technology; and carrying out full-chain storage management. Through comprehensive application of cold storage, ice temperature and freezing in combination with a modified atmosphere fresh-keeping packaging technology, the storage time of the mutton is remarkably prolonged, and meanwhile the excellent quality of the mutton is kept. The cold storage and ice temperature technology effectively inhibits the growth and enzymatic reaction of microorganisms, delays the oxidation process of the mutton, and maintains the color, texture and flavor of the mutton; the quick freezing and ultrasonic unfreezing technology is adopted, so that the damage to the cell structure of the mutton in the freezing and unfreezing process is reduced to the maximum extent. By optimizing the unfreezing process, juice loss is reduced, the unfrozen mutton still keeps good texture and taste, and the problem of quality loss in a traditional method is solved.

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 invention relates to a method of producing frozen products in which a predetermined amount of carbon dioxide snow is produced and piled up to form a volume of snow. Subsequently, a mold impression is pressed into one surface of the snow volume, forming depressions into which at least one product to be cooled is filled. In a cooling device, the product in the snow volume is cooled through, while the snow volume itself gradually sublimates. The process and the device are particularly suitable for the production of individual quick freezing (IQF) products.

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.