16results about How to "Improve pre-cooling effect" patented technology

The invention discloses pre-cooling equipment for cooling fruits and vegetables by cold storage water. Comprising a material area used for containing fruits and vegetables, a cold storage water tank arranged at the lower end of the material area, a cold storage device used for conducting cooling and cold storage on water in the cold storage water tank, and a cold storage cavity formed between the material area and the water surface in the cold storage water tank. The air cooling conveying device is used for conveying cold air in the cold storage cavity to the material area; and the air return device is used for conveying hot air in the material area to the cold storage cavity. According to the precooling equipment, cold air is adopted for cooling and precooling fruits and vegetables, the problem that field heat of part of fruits and vegetables cannot be removed in a water precooling mode is solved, the fruits and vegetables can be prevented from being rotten, an air cooling cooling circulation mode is adopted, the cold energy utilization efficiency is high, and the precooling effect is good.

The invention belongs to the technical field of gas recovery, and particularly relates to an emptying gas recovery device in the medical oxygen filling process. The device is mainly composed of a medical oxygen steel cylinder, a filter, a compressor, a precooler, a liquefaction cooler, a rectifying tower and related pipelines, oxygen is filled into the medical oxygen steel cylinder through a first pipeline, emptying gas of the medical oxygen steel cylinder enters the filter through a second pipeline to be filtered, the filtered gas enters the compressor to be compressed, and the compressed gas enters the precooler to be liquefied. The compressed gas enters a precooler to be precooled, the precooled gas is liquefied under the action of a liquefaction cooler, liquefied air enters a rectifying tower to be rectified through a reboiler, and nitrogen, argon and oxygen are sequentially separated out; the precooler is reasonable in design, the air stroke is greatly prolonged, the cooling unit can fully precool air, and the precooling effect is good.

This invention discloses a rapid negative pressure pretreatment machine for fruits and vegetables, comprising a fixed frame and a negative pressure chamber. The negative pressure chamber is fixedly installed inside the fixed frame. A cold air assembly is installed at the bottom of the inner wall of the fixed frame, and a conveyor belt is fixedly installed near the top of the inner wall of the fixed frame to transport fruits and vegetables into the negative pressure chamber. A reciprocating moving assembly is fixedly installed on the conveyor belt. This invention solves the problems of uneven precooling and blind spots in existing negative pressure pretreatment machines for fruits and vegetables. Through the linkage design of the reciprocating moving assembly and the cold air assembly, combined with the flipping action of the lever, two sets of symmetrically arranged cold air nozzles are located at the top and bottom of the conveyor belt, respectively. With the reciprocating swing and linear movement, and the lever flipping the fruits and vegetables, the upper and lower surfaces, sides, and contact parts of the fruits and vegetables can be fully contacted with the cold air, ensuring uniform cooling of the same batch of fruits and vegetables. This solves the problems of large differences in cooling rate and poor negative pressure treatment effect caused by traditional precooling.

The utility model discloses an ice maker which comprises a pre-cooling water path plate, an evaporator and a spraying water path plate, the evaporator comprises an evaporation pipe and a plurality of ice fingers which are fixedly connected with the evaporation pipe and extend downwards, and the evaporation pipe is clamped between the pre-cooling water path plate and the spraying water path plate; the pre-cooling water path plate is provided with a raw water inlet, a pre-cooling cavity communicated with the raw water inlet and a pre-cooling water outlet communicated with the pre-cooling cavity, and the spraying water path plate is provided with a pre-cooling water inlet communicated with the pre-cooling water outlet, a spraying cavity communicated with the pre-cooling water inlet and a spraying opening communicated with the spraying cavity. The spraying waterway plate is further provided with a through hole for the ice finger to penetrate through, and the spraying openings are arranged around the through hole. The interlayer design of the pre-cooling water path plate, the evaporator and the spraying water path plate can protect the evaporator on one hand, and on the other hand, the cooling capacity of the evaporator can be fully utilized to pre-cool raw water, so that the ice making efficiency is improved.

This invention discloses a rapid precooling system and method for a liquid hydrogen refueling station, belonging to the field of liquid hydrogen technology. The precooling system includes a liquid hydrogen refueling pipeline, a liquid hydrogen supply tank, a valve subsystem, a liquid hydrogen refueling tank, a circulation pipeline, a condenser, a gas-liquid separator, a liquid carbon dioxide tank, a storage cylinder, a helium pipeline, a high-pressure helium cylinder, a fuel cell, a cryogenic hydrogen pipeline, and a liquid hydrogen storage tank group. This system utilizes liquid carbon dioxide and cryogenic helium to achieve deep coupling between system displacement and precooling operations. After displacement, the system temperature has dropped below the temperature of liquid carbon dioxide, significantly reducing precooling time. It also utilizes cryogenic hydrogen stored in the liquid hydrogen storage tank group to liquefy carbon dioxide, achieving carbon dioxide medium circulation. Simultaneously, the hydrogen released after cooling and the hydrogen generated during precooling are transported to the fuel cell for power generation, improving hydrogen utilization efficiency.

A novel pre-cooling spraying system for a low-temperature liquefied gas storage tank is characterized by comprising a cooling spraying pipeline and nozzles installed on the cooling spraying pipeline, the cooling spraying pipeline comprises an outer ring pipeline and an inner ring pipeline, outer ring nozzles are installed on the outer ring pipeline, inner ring nozzles are installed on the inner ring pipeline, and the outer ring nozzles are communicated with the inner ring nozzles. The outer ring pipeline and the inner ring pipeline are hung on a suspended ceiling at the top of the tank body through a pipeline support, and cooling fluid is led into a cooling fluid inlet in the center of the inner ring pipeline from the outside of the tank body through a pipeline and then flows into an inner ring nozzle on the inner ring pipeline through a radial pipeline. The cooling fluid further flows into the outer ring pipeline through a radial pipeline communicating the outer ring pipeline with the inner ring pipeline and flows out of an outer ring nozzle installed on the outer ring pipeline. The pre-cooling device can reduce the temperature at a relatively constant speed, improve the temperature field and the atomization effect at the cooling stage, and avoid the dripping leakage of the nozzle, thereby improving the pre-cooling effect of the storage tank.

The invention provides a natural gas hydrate freezing sampling device which is arranged in a drill pipe with the bottom connected with a drill bit and comprises an inner pipe, a cold source chamber upper connector, a cold source chamber lower connector and a sealing plate are sequentially arranged in the inner pipe from top to bottom at intervals, and a cold source storage chamber is formed between the cold source chamber upper connector and the cold source chamber lower connector. A freezing chamber is arranged between the cold source chamber lower connector and the sealing plate, and a freezing pressure maintaining chamber is formed between the sealing plate and the clamping spring seat. A core barrel is coaxially arranged in the freezing chamber, a first through hole is formed in the lower connector of the cold source chamber, a second through hole is formed in the sealing plate, and the valve rod penetrates through the upper connector of the cold source chamber, the first through hole and the second through hole in a sliding mode. A first piston and a second piston which are respectively embedded with the first through hole and the second through hole are arranged on the valve rod at intervals; the problems that at present, only the side wall of a core barrel is frozen, the lower end of the core barrel is not frozen, and the freezing effect and the pressure maintaining effect are poor are solved.

The utility model relates to the technical field of coal chemical equipment, in particular to a condensation refrigeration system of a VOCs (volatile organic compounds) treatment device, which comprises a first heat exchanger tube pass input end connected with a first liquid phase propylene conveying branch tube, a tube pass output end connected with a first output branch tube, a shell pass input end connected with a refrigerant conveying tube, and a second heat exchanger tube pass output end connected with a second liquid phase propylene conveying branch tube. The shell pass output end is connected with a first refrigerant output pipe; the tube pass input end of the second heat exchanger is connected with a second liquid-phase propylene conveying branch pipe, the tube pass output end of the second heat exchanger is connected with a second output branch pipe, the shell pass input end of the second heat exchanger is connected with a first conveying pipe for flowing VOCs and methanol gas, and the shell pass output end of the second heat exchanger is connected with a second conveying pipe; the tube pass input end of the third heat exchanger is connected with the first refrigerant output pipe, the tube pass output end is connected with the second refrigerant output pipe, the shell pass input end is connected with the second conveying pipe, and the shell pass output end is connected with the third conveying pipe. According to the utility model, the problems of poor pre-cooling effect, long driving time and high power consumption of the compressor are solved.

This invention discloses a combined power cycle system and method for cooling incoming air using ammonia-water, relating to the aerospace field. The system can switch between turbine-ramjet operating modes through an adjustable structure. Particularly during turbine-ramjet switching, ammonia-water is used to cool the high-temperature incoming air in the intake duct. The absorbed ammonia-water is then distilled to separate high-temperature ammonia gas and water. This invention combines heat exchanger precooling and jet precooling, effectively increasing the pressure ratio of the fan and compressor through multiple air cooling processes. This improves the compressor outlet gas temperature, thereby reducing compressor power consumption and providing greater thrust. Ammonia, as a supplementary fuel, has a higher specific impulse, addressing the thrust gap during engine mode transitions and effectively widening the operating speed range of the turbine engine.

The utility model belongs to the technical field of cooling devices, and relates to a cooling precooling device. The device comprises a pre-cooling box body and an atomization generation system, a pre-cooling groove with a U-shaped section is formed in the pre-cooling box body, a first spraying compartment and a second spraying compartment are symmetrically arranged on the two sides of the pre-cooling groove, and the two spraying compartments are communicated with the pre-cooling groove through a first spraying outlet and a second spraying outlet respectively. And the first spray outlet and the second spray outlet are both provided with screen plates. The cooling and pre-cooling device can not interfere with normal production takt, can meet the requirement of mass production, can ensure that galvanized sheets are uniformly cooled in the pre-cooling process by adopting the design of the spraying compartments and the net plates which are symmetrically arranged, and can ensure that atomized gas is uniformly sprayed to the surfaces of objects through the net plates, so that the quality of the galvanized sheets is improved. And the condition of local overheating or supercooling is effectively avoided, so that the consistency and the stability of the product quality are ensured.

The utility model provides a litchi precooling device, which relates to the technical field of fruit preservation, and comprises a precooling pool, a cover plate, a connecting frame and a plurality of net-shaped storage containers, a plurality of precooling grooves and a plurality of cold source grooves are arranged in the precooling pool, the precooling grooves and the cold source grooves are alternately arranged, a separation net connected with the precooling pool is arranged between the adjacent precooling grooves and cold source grooves, and the net-shaped storage containers are connected with the precooling pool. The connecting frame is connected with the multiple net-shaped storage containers, one end of the connecting frame is hinged to the pre-cooling pool, telescopic assemblies are hinged to the two sides of the pre-cooling pool respectively, the two sides of the connecting frame are hinged to the movable ends of the corresponding telescopic assemblies respectively, the net-shaped storage containers are arranged in the corresponding pre-cooling grooves, and the cover plate is connected with a first telescopic frame and a second telescopic frame. The first telescopic frame is in sliding connection with the pre-cooling pool, the cover plate is matched with the pre-cooling pool, the net-shaped storage container can make litchis immersed in cold water, the pre-cooling effect of the litchis is improved, the litchis are separated from ice blocks, mechanical damage to the litchis is avoided, and the quality of the litchis is guaranteed.

The utility model relates to an energy -conserving continuous operation's compressed air cold dry device, include: casing, the inside partition becomes the inner area and the outer area of bottom intercommunication arrangement, guide and discharge mechanism contain 2N synchronous rotation installation in the hollow disc in the inner area, the first odd hollow disc is connected between the lower adjacent hollow disc by multiple circumferential annular array distribution's guide pipe, and the first even hollow disc is connected through the coaxial pipe of center between the lower adjacent hollow disc, the bottom plate in the guide flow cavity of first even hollow disc is provided with multiple guide plates along annular array distribution setting, guide gas mechanism contains multiple annular array distribution and the guide through piece of hollow disc up and down, guide liquid mechanism contains the spiral blade that rotates and is installed in the outer area and is set to the spiral blade that leans down, spiral blade connects to the lowest hollow disc, the utility model can effectively improve the efficiency and effect of air cooling drying, and can realize the energy -conserving effect through the waste heat recovery regeneration.

The utility model belongs to the technical field of quick-freezing containers, and particularly relates to a quick-freezing container based on the differential pressure principle, which comprises a box body, a square groove is arranged on the side surface of the box body, an air cooler is fixedly connected to the inner surface of the square groove, an air inlet hole is arranged on the inner surface of the square groove, and an inlet of the air inlet hole corresponds to the side surface of the air cooler. The inner top of the air inlet hole is provided with a diversion groove, the inner bottom of the diversion groove is provided with a plurality of diversion holes, the inner surface of the square groove is fixedly connected with an exhaust fan, the inner surface of the square groove is provided with an air outlet hole, the outlet of the air outlet hole corresponds to the side surface of the exhaust fan, and the inner bottom of the air outlet hole is provided with a confluence groove. A plurality of confluence holes are formed in the inner top of the confluence groove. According to the food pre-cooling device, generated cold air can actively and rapidly flow in food, so that the speed of cooling the food is increased, the pre-cooling effect is improved, and cold chain transportation of the food is facilitated.

The invention relates to the technical field of cable maintenance and pipeline plugging, and discloses an oil-filled cable freezing device capable of expanding an oil-filled cable chamber, which comprises a freezing main chamber, an oil-filled cable body is arranged in the freezing main chamber, and a standardized interface is arranged at the bottom of the freezing main chamber. The main freezing chamber is fixedly connected with a flange through a standardized interface, the main freezing chamber is fixedly connected with an auxiliary freezing chamber through the flange, a copper bottom plate is arranged in the main freezing chamber and surrounds the oil-filled cable body, and a liquid nitrogen conveying pipe with a nozzle is arranged in the copper bottom plate. An air guide opening is formed in the upper portion of the main freezing cavity, a cold guide pipe is fixedly connected into the auxiliary freezing cavity, and the auxiliary freezing cavity is fixedly connected with the air guide opening through the cold guide pipe. According to the invention, the working condition adaptability and deployment flexibility of the device are enhanced through modular design; and through cascade reuse of cold nitrogen, maximum utilization of cold energy is achieved, and high efficiency and economical efficiency are both achieved.

A vacuum three-chamber ultra-high temperature shock testing device and method are disclosed, relating to the field of temperature shock testing technology. The device includes: a vacuum chamber containing, from top to bottom, a high-temperature chamber, a pre-cooling conversion chamber, and a low-temperature cooling chamber; a lower moving mechanism for controlling the lifting and lowering of a sample stage to allow the sample stage to enter the three chambers; movable heat insulation screens positioned at predetermined distances above and below the sample stage, and raised and lowered synchronously with the sample stage by the lower moving mechanism; and a water-cooled cooling jacket movable vertically within the high-temperature chamber, with an upper moving mechanism controlling its descent after heating in the high-temperature chamber to achieve sample pre-cooling. This temperature shock testing device extends the ultra-high temperature and pre-cooling capabilities of temperature shock testing devices, significantly improving their performance range.

The application belongs to the field of hydraulic systems, and discloses a digital intelligent temperature control heat dissipation system, which comprises a heat dissipation device, a temperature control assembly, an oil inlet pipeline and an oil outlet pipeline, the heat dissipation device comprises a fan and a composite heat dissipation assembly arranged at the air outlet end of the fan, and the composite heat dissipation assembly is communicated with a hydraulic station through the oil inlet pipeline and the oil outlet pipeline. The effective combination of water cooling and air cooling can be realized through the composite heat dissipation assembly, the oil network pipe component can be pre-water-cooled through water cooling of the water cooling chamber, and further air cooling can be realized through the heat dissipation structure similar to the capillary pipeline under the action of air cooling, the cooling liquid after absorbing heat in the water cooling chamber can be air-cooled through the network air cooling part, so that the cooling liquid can be water-cooled for a longer time, and the network air cooling part and the pipe connection part of the air cooling area are staggered, so that air cooling and heat dissipation can be realized for both at the same time under the air cooling action of the fan.