40results about How to "Reduce frostbite" patented technology

Provided is a preparation method and device of personalized nano ice cream. Liquid nitrogen and ice cream raw materials are injected into a material container installed in a rotating-revolving mixer in a jet mode, the container containing the liquid nitrogen and ice cream raw materials performs high-speed revolution and rotation in a revolution track through the rotating-revolving mixer. Therefore, revolution energy having powerful accelerated speed is produced, meanwhile rotation makes the materials in the container to produce convection, accordingly full stirring, dispersion and defoaming within short time are achieved, and uniformly distributed nano ice crystals are efficiently formed. High-speed revolution and rotation mixing make the milk fat globules in the ice cream raw materials smaller and more uniformly emulsified, and finally a stable nano ice crystal-milk fat globule-microbubble structure is formed. The material container utilizes a container adapter for placement, common ice cream can be placed in a machine for direct processing, and container cleaning and waste are completely avoided. The production process is simple and stable, no stabilizer nor emulgator is needed in the preparation process, and the made ice cream has a fine and smooth taste and strong milk fragrance and is more natural.

The invention relates to a quick freezing device, in particular to a tunnel-type liquid nitrogenquick freezing machine, and solves the technical problems of serious liquid nitrogen leakage and high liquid nitrogen consumption of an existing liquid nitrogen quick freezing machine. The tunnel-type liquid nitrogen quick freezing machine comprises a tunnel-type freezing chamber and a surrounding-type conveying mesh belt in the freezing chamber, wherein liquid nitrogen plugging devices are arranged at the feeding end and discharging end of the freezing chamber respectively; each liquid nitrogen plugging device comprises an air box arranged at the top of the conveying mesh belt; an air inlet channel is formed in the top of the air box; an air blowing hole is formed in the bottom of the air box; the air box is hermetically fixed with a top plate and two side walls of the freezing chamber; an air inlet communicated with the air inlet channel of the air box is formed in the top plate of the freezing chamber; a fan is arranged on the air inlet; the width of the air blowing hole is the same as that of the freezing chamber; a material conveying hole is formed between the air blowing hole and the conveying mesh belt. Due to the adoption of the liquid nitrogen quick freezing machine, the liquid nitrogen consumption can be reduced by 40-50% and the quick freezing cost is greatly reduced in comparison with a liquid nitrogen quick freezing machine without the plugging devices.

The present invention proposes a buoyancy valve, which includes a valve body; a valve chamber and a buoyancy chamber are arranged in the valve body; a valve core is arranged in the valve chamber, a float is arranged in the buoyancy chamber, and the float and the valve The mandrel of the core is connected; the valve body is provided with a first port, a second port, a third port and a fourth port; the first port and the second port communicate with the valve chamber, so The third port and the fourth port communicate with the buoyancy chamber; the float has an initial state and a floating state, and when the float is in the initial state, the buoyancy valve connects the first port and the second port disconnected, when the buoy is in the floating state, the buoyancy valve communicates the first port with the second port. The buoyancy valve can be used to easily identify when the emptying operation is completed, thereby effectively ensuring the emptying effect, which is beneficial to improving the service life and user experience of the water washing system. In addition, the present invention also proposes a water washing system and construction machinery with the buoyancy valve.

The invention relates to a preparation method for a rat mild hypothermia animal model. The preparation method comprises the steps as follows: placing a rat into a ventilated rat cage, placing the rat cage into a low temperature environment of 4 DEG C, placing an ice bag outside the rat cage for auxiliary cooling, and continuously monitoring the change of the anal temperature of the rat based on the target temperature of 33 plus or minus 0.5 DEG C; and when the anal temperature is lower than the lowest limit of 32.5 DEG C, moving away the ice bag or placing the rat and the rat cage into a room temperature environment, and when the anal temperature is higher than the highest limit of 33.5 DEG C, moving the rat cage to the low temperature environment of 4 DEG C, and carrying out auxiliary cooling through the ice bag. The invention further provides the rat mild hypothermia animal model and an application thereof. The invention has the advantages as follows: the target temperature is quickly reached; the body temperature fluctuation range is small; the rat skin freezing injury is reduced; and the blood sugar is controlled to be in a normal range.

The invention discloses a liquid gasifying device and a gasifying method thereof and belongs to the field of energy chemical industry. The liquid gasifying device comprises a shell, multiple heat medium nozzles and a heat medium distribution pipe net. The shell is provided with an inner cavity. The inner cavity is used for containing a steel bottle and a heat medium enabling liquid contained in the steel bottle to be gasified. The shell is provided with a shell opening used for placing and taking out the steel bottle. The multiple heat medium nozzles are arranged on the shell and used for injecting the heat medium into the inner cavity of the shell. The heat medium distribution pipe net communicates with the multiple heat medium nozzles and are used for transferring the heat medium to the multiple heat medium nozzles and controlling the injection amount and the injection speed of the multiple heat medium nozzles. The liquid gasifying device and the gasifying method thereof have the beneficial effects of being capable of improving use efficiency of the heat medium and gasifying efficiency of liquid, being capable of reducing frost damage to a pipeline and equipment from liquid, and thus prolonging the service life of the equipment. The liquid gasifying device and the gasifying method thereof improve responsiveness and precision of liquid to temperature in the gasifying process.

The invention belongs to the technical field of fresh-keeping of fruits and vegetables, and specifically discloses a method for reducing freezing damage of blueberries. The method of the invention comprises the following steps: selecting blueberry fruit, ultraviolet treatment, soaking in mixed solution, treatment with fresh-keeping solution, sealing, vacuum freezing and the like. The method of the invention combines fresh-keeping liquid treatment and vacuum freezing to carry out fresh-keeping treatment, can effectively reduce freezing damage of blueberries, prolong the fresh-keeping time of blueberries, maintain the sensory quality of blueberries, and has good market prospects.

The invention discloses a refrigerator for cold chain transportation, which relates to the technical field of cold chain transportation. It includes a refrigerated box body, and the bottom end inside the refrigerated box body is fixedly installed with a circulating cooling mechanism; the circulating cooling mechanism includes a water storage tank and a water pump, and the bottom of the water storage tank is in phase with one side of the bottom end inside the refrigerated box body. fixed. The invention transports the ice water in the water storage tank to the inside of the cooling pipe through the water pump, and then achieves the function of adjusting the temperature of the ice bag placed in the device through the temperature-penetrating plate, and realizes the complete control of the temperature of the placed ice bag with a simple mechanical structure. The maintenance of the refrigerating box reduces the speed of temperature change in the refrigerator; in addition, the ventilation pipes, the temperature-permeable plates, the air outlet protrusions and the interior of the placing box are connected to realize the direct conduction of the cold air in the water storage tank to the placing box. The arrangement inside the box realizes the direct cold chain storage of the goods inside the box, and improves the cooling effect of the refrigerated box.

The invention relates to the technical field of plant planting, in particular to a high-altitude-area field planting method of radix tetrastigme. The method comprises the following steps of 1, field selection, 2, land preparation and bedding, 3, planting, 4, watering and seedling preserving, 5, seedling supplementing, 6, weeding and vine thinning, 7, vine turning, 8, fertilization, 9, overwintering management, and 10, harvesting. The high-altitude-area field planting method of radix tetrastigme is adapted to conducting planting in a high-altitude area, plants have a great capability of resisting diseases and insect pests, and the crop yield and quality are high.