70results about How to "Prevent ice blockage" patented technology

The invention relates to a mine liquid-CO2 fire preventing and extinguishing process and device for preventing and extinguishing fire by conveying liquid CO2 to an underground fire zone and injecting a fire zone by using the liquid CO2 and utilizing the liquid CO2 to asphyxiate oxygen in the fire zone, cool, decrease temperature and inertly suppress explosion. A mine liquid-CO2 fire preventing and extinguishing system comprises a liquid CO2 tank car (1), a liquid CO2 storage tank (2), a carburetor (10), a self-pressurization pipeline, a liquid inlet and outlet pipeline, and the like; and the fire preventing and extinguishing device comprises the liquid CO2 storage tank (2), the carburetor (10), the self-pressurization pipeline, the liquid inlet and outlet pipeline, and the like, wherein the self-pressurization pipeline comprises a self-pressurization liquid outlet pipeline and a self-pressurization gas intake pipeline and is combined with the carburetor (10) to form a self-pressurization system so as to realize the self comprehension of pressure in the tank. The invention solves the technical problem of the gasification and icing in the liquid CO2 tank and the pipeline conveying process, realizes safe transfer, storage, transmission and injection and has the advantages of high extinguishment speed, simpleness of operation, low cost, operation stability, remarkable fire extinguishment and prevention effects, wide practicability and the like.

The invention provides a refrigerator which comprises a refrigerator body, a blower component and a one-way air inlet valve, wherein the refrigerator body is internally provided with a storage cavity, the wall of the storage cavity is provided with a drainage channel, and water in the storage cavity can be discharged to the exterior of the storage cavity along the drainage channel; the blower component is arranged at the outlet of the drainage channel and blows air outwards from the outlet of the drainage channel so as to assist the drainage channel to discharge the water outwards; the one-way air inlet valve is arranged on the refrigerator body and is communicated with the storage cavity; air outside the refrigerator body can enter into the storage cavity through the one-way air inlet valve when negative pressure is formed in the storage cavity. The refrigerator is simple in structure and convenient to manufacture, can effectively increase the humidity in the storage cavity so as to better meet the vegetable preservation requirement when the interior of the storage cavity is dry, and is relatively obvious in practicability.

The invention provides a condensed water collecting device for an air-cooled type three-temperature-zone refrigerator. The air-cooled type three-temperature-zone refrigerator comprises a refrigerating chamber (2), an alternating temperature chamber (3) and a freezing chamber (4), wherein the rear part of the freezing chamber is provided with an evaporator (5) and a freezing air channel; an alternating temperature chamber air channel cover plate (13), an alternating temperature chamber air outlet (14) and an alternating temperature chamber return air inlet (15) are arranged in the alternating temperature chamber (3); the rear parts of the freezing chamber (4) and the alternating temperature chamber (3) are provided with an alternating temperature chamber return air channel (17), and the alternating temperature chamber return air inlet (15) is connected with the alternating temperature chamber return air channel (17); and the surface of the alternating temperature chamber air channel cover plate (13) is provided with a water guide strip (16). The condensed water generated on the alternating temperature chamber air channel cover plate is guided by the water guide strip (16).

The invention discloses a gas direct contact type ice slurry preparation system. The system comprises three parts of refrigerant circulation, gas circulation and ice-making solution circulation, wherein a refrigerating medium adopts an environmental-friendly gas, such as air, nitrogen, and the like. Compared with a liquid refrigerating medium, the gas with same mass can generate more air bubbles in an ice slurry generator so as to increase the heat exchange area; the gas is easier to realize higher gas inlet speed so as to promote the diffusion of the air bubbles; the temperature distribution in the ice slurry generator is more even, the local supercooling is prevented, and the probability of generating an ice blockage is reduced. In addition, a first-class heat exchanger is adopted in the system. A refrigeration system evaporator is arranged in the first-class heat exchanger, and a refrigerating medium gas directly contacts with solution (ethanediol solution) in the first-class heat exchanger to exchange heat. Because of the intensive disturbance function of the gas, the convection heat exchanging factor of the refrigerating medium and the evaporator is greatly increased, and the problem of larger heat resistance caused by direct convection heat exchange of the gas and the refrigerating system evaporator is solved. Accordingly, the gas with higher temperature passes through refrigerating medium solution with lower temperature, thereby achieving the aim for removing water in the gas and further reducing the probability of the ice blockage of the system.

The invention provides a vortex direct contact ice maker, characterized in that: ice making container is connected smoothly of the upper half part of cylindrical flow stabilizing cavity and the lower half part of conic separating cavity, the center of top end cover of the ice making container is equipped with funnel ice slurry outlet and the bottom equipped with cryogen outlet, the top of the flow stabilizing cavity is respectively equipped with pairs of uniformly separated and symmetrically distributed secondary refrigerant and water solution spray nozzles in the tangent direction of the cylinder wall; when making ice slurry, the secondary refrigerant and water solution injected into the flow stabilizing cavity form vortex and fully mix and exchange heat with each other to make a part of water solution turn into ice slurry, and they are respectively separated and discharged under the action of centrifugal force of the vortex and gravity. And the ice maker solves the problem of separation of ice slurry from water solution and secondary refrigerant, avoiding ice jam happening caused by adhesion of ice slurry particles and the problems of large secondary refrigerant dosage caused by carrying secondary refrigerant and ice slurry into ice storage cylinder and of carrying water solution into plate heat exchanger, further improving the efficiency and running stability.

The invention relates to the technical field of oil and gas field down-hole operation, and specifically relates to a low-pressure sandstone reservoir gas well temporary blocking workover fluid and a preparation method thereof. The workover fluid is composed of the following components, according to percentages in the wellbore volume: 10-20% of an alcohol-based temporary blocking workover fluid, 0.5-1% of an oil-based spacer fluid, and 79-89.5% of a high-efficiency clay stabilizing agent. The alcohol-based temporary blocking workover fluid is composed of the materials of, by mass, 0.5-1% of a water-absorbent polymer, 1-2% of temporary blocking fiber, 0.5-1% of a fiber dispersing agent, 45-50% of water, and balance of alcohol. The high-efficiency clay stabilizing agent is composed of the materials of, by mass, 0.6-1% of a clay stabilizing agent and 99-99.4% of water. With the workover fluid provided by the invention, effective temporary blocking can be realized upon a porous sandstone reservoir; and the harm of the workover fluid upon stratum can be reduced. The workover fluid also has the characteristic of good salt tolerance. With the workover fluid, hydrate blockage is not formed. The workover fluid is safe and environment-friendly, and is convenient for construction.

According to a fuel cell cold starting device and a method thereof, a first gas path system, a second gas path system and a heating assembly are all controlled by a central control system. During cold start, the first gas path system generates heat through compressed air to heat a cathode of a fuel cell stack, the second gas path system conveys hydrogen to enable the fuel cell stack to perform hydrogen-oxygen reaction heat release, and meanwhile, the heating assembly receives a power signal to perform heating. Through the above three heating processes, the fuel cell system, especially a fuel cell stack, is rapidly heated, so that the temperature value and the internal resistance value of the fuel cell system reach numerical values required by cold start, cold start in a short time is rapidly realized, the time required by cold start is shortened, and the efficiency is high; besides, during shutdown, air and hydrogen are adopted to blow the system at the same time to dry residual moisture, and whether the humidity in the system meets the requirement or not is judged by monitoring the rising condition of the internal resistance value, so that blowing is controlled to be stopped, and conditions are created for next cold start.

The invention relates to a high-pressure natural gas pressure energy refrigeration method for junked tire cryogenic pulverization. The pressure energy of high-pressure natural gas is converted into mechanical work and cold energy through an expansion machine in a natural gas regulator station. The mechanical work and the cold energy are recycled through refrigerants, the mechanical work is used for compressing the refrigerants, the compressed high-pressure refrigerants are cooled through an optimally-designed heat exchange network through the cold energy generated through the expansion of the high-pressure natural gas, the gas inlet temperature of the high-pressure natural gas entering the expansion machine is improved, and the mechanical work generated by the expansion of the high-pressure natural gas is increased. The cooled high-pressure refrigerants are conveyed to a junked tire cryogenic pulverization area through a heat preservation pipeline, low-temperature cold energy below -100DEG C is generated by the high-pressure refrigerants through the refrigerant expansion machine, the mechanical work generated by the expansion of the high-pressure refrigerants is used for the primary pressure boost of the refrigerants with the cold energy used up, the refrigerants are conveyed back to the natural gas regulator station, and a refrigerating cycle is formed. The high-pressure natural gas pressure energy refrigeration method has the advantages of effectively utilizing energy and preventing ice blockage, and belongs to the field of natural gas pressure energy utilization.

The invention provides a device for preventing icing blockage of a ventilation pipeline and an automobile engine, and relates to the technical field of automobiles. The device for preventing icing blockage of the ventilation pipeline comprises an thermal expansion and cold shrinkage mechanism, a heating and heat preservation circuit and a heating and heat preservation layer, wherein the thermal expansion and cold shrinkage mechanism and the heating and heat preservation layer are both connected with the heating and heat preservation circuit, the heating and heat preservation layer is used forwrapping the outer side of the crankcase ventilation pipeline, the expansion and the shrinkage of the thermal expansion and cold shrinkage mechanism can control disconnection and connection of the heating and heat preservation circuit so that the crankcase ventilation pipeline can be heated when the heating and heat preservation circuit is connected. The automobile engine comprises the device forpreventing icing blockage of the ventilation pipeline. According to the device and the automobile engine, the technical problems that in the prior art, aging of the crankcase ventilation pipeline is likely to be accelerated, the structure is complex and the control is complex are solved.

The invention provides an ice-making device and method for a refrigerator. The ice-making device comprises an ice-making mould arranged in a first refrigeration room with the temperature being lower than 0 DEG C and provided with a plurality of ice-making cavities, a water storage device filled with high-pressure water, a water feeding pipe communicating with the water storage device and the ice-making cavities, a valve and a controller, wherein the valve and the controller are arranged on the water feeding pipe and are in communication connection; the water storage device is arranged in a second refrigeration room with the temperature being higher than 0 DEG C; on the one hand, in the process that supercooled water enters the ice-making cavities from the water feeding pipe, the phenomenon of ice plugging of the supercooled water in the water feeding pipe can be prevented; on the other hand, after the supercooled water flows out of the water storage device, the pressure intensity of the supercooled water is relieved, and the freezing point is raised, so that the supercooled water is quickly solidified into ice after entering the ice-making cavities, and the ice-making speed is increased; and meanwhile the ice-making cavities are in a closed state, the phenomenon of taint of odor of the supercooled water can be prevented, and the quality of a made ice block is improved.

The invention provides an oxygen generation control system of a PSA oxygen generator. The PSA oxygen generator comprises an air compressor, a freezing dryer and an oxygen generator; an oxygen generation control system of the PSA oxygen generator at least comprises an air tank drainage system, an oxygen concentration adjusting control and alarm system, a freezing dryer control system, a PLC controlprogram and a network control system; the air tank drainage system at least comprises a pressure sensor mounted at the bottom of an air storage tank, a drainage air control valve mounted at the bottom of the air storage tank and a dew point monitoring device mounted at an exit of the air storage tank. In the drainage system of the control system, a pressure sensor and a drainage air control valveare mounted at the bottom of the air storage tank, and a dew point monitoring device is mounted at the exit of the air storage tank; the drainage time and drainage interval of the air tank can be accurately controlled according to the pressure and dew point of the air tank; therefore, the oxygen generation control system of the PSA oxygen generator has the advantages of more accurate control, more stable performance and high safety.

The invention relates to an integrated gas-water separator for a fuel cell; the separator comprises a gas-water separator shell, a return hydrogen inlet formed in one side of the gas-water separator shell, a water outlet formed in the bottom of the gas-water separator shell, and a return hydrogen outlet formed in the top of the gas-water separator shell, and further comprises a gas outlet detection pressure gauge mounted on the gas-water separator shell close to the hydrogen return outlet, a liquid level meter arranged on the gas-water separator shell close to the water outlet, a drain valve arranged on the gas-water separator shell at the water outlet, a heater, a nitrogen discharge valve and a labyrinth structure. The gas-water separator is compact in structure, small in size and high in integration degree, the gas outlet detection pressure gauge is used for detecting the gas pressure of the hydrogen return outlet to guarantee that the gas outlet pressure meets the requirement, the liquid level meter is used for detecting the water level of the bottom in the gas-water separator shell, and after the water level reaches a set value, the drain valve is opened in time to drain water. The heater is used for heating the bottom of the gas-water separator shell to prevent the water outlet from being frozen and blocked.

The invention provides an inflatable solar water heater thermal insulation and antifreeze airbag, which includes a solar module installed on a solar installation frame, an L-shaped installation frame is installed on the upper and lower sides of the solar energy installation frame, and the upper and lower two L-shaped installation frames are respectively installed. There is an air suction pump and an air intake pump, the air intake of the air extraction pump is connected to the air bag through the air extraction pipe, the air outlet of the air intake pump is connected to the air bag through the air intake pipe, a mounting part is installed on the solar module header via bolts, the An airbag is installed on the mounting part, and a guide plate inclined from right to left is installed on the solar energy mounting frame. The present invention uses an air intake pump to fill high-pressure gas into the telescopic air pipe to make the telescopic air pipe stretch and prevent heat loss in the vacuum pipe. Or when the temperature is low on cloudy days, the pipeline will be cracked or blocked by freezing. It has high safety. The use of pearl cotton insulation material has excellent thermal insulation effect, light weight and low cost, and can maintain the temperature of the vacuum tube for a long time.

The invention discloses a low-temperature defrosting water pan and drainage pipeline and a use method thereof. The low-temperature defrosting water pan and drainage pipeline comprises an evaporator, a heating assembly arranged outside a refrigeration house and a water pan arranged below the evaporator, wherein the bottom of the water pan communicates with a water outlet pipe, the bottom end of the water outlet pipe communicates with a first water guide pipe, and the bottom end of the first water guide pipe communicates with a second water guide pipe through a connector. The invention relates to the technical field of evaporator auxiliary equipment. According to the low-temperature defrosting water pan and drainage pipeline and the use method thereof, anti-freezing liquid is heated through the heating assembly, conveyed into the pipeline and the water pan through a circulating pump and then returned into the heating assembly through a return pipe for continuous heating circulation, so that when an evaporator is in the defrosting working condition, the anti-freezing liquid heating assembly works, the temperature of the water pan and drainage pipeline is kept above 0 DEG C, the phenomenon that melted water, the water pan and drainage pipeline are frozen when the evaporator carries out a defrosting procedure is prevented, and the phenomenon that the evaporator is blocked by ice due to the fact that the water pan and drainage pipeline is frozen is avoided.

The invention provides a device capable of realizing high-efficiency preparation of ice slurry, and provides the improvement thereof in the industrial production. The device adopts a gas direct contact method; and on this basis, a coiled tube type precooling sleeve and a nozzle gas transmission auxiliary heat exchange device are additionally arranged to largely enhance the ice slurry preparation effect and to improve the preparation efficiency. The precooling sleeve is formed by coiling a copper tube around an ice slurry preparation device; when gas flows through the coiled tube type copper tube, solution can be precooled firstly, and the stop time of the gas in the device is prolonged, so that the whole heat exchange efficiency is improved; and a nozzle device prolongs the stop time of the gas in the device to increase the heat exchange area between the gas and the solution. In addition, a vacuum insulation measure is added, and a vacuum thermal insulation principle is used for vacuumizing the middle part of two layers of an outer barrel of the device, so that the cooling capacity loss of secondary refrigerant gas to the environment when flowing in the device is reduced. Through the improvement, experiments and industrial production equipment are simplified and optimized to facilitate the construction and the later maintenance.

The invention discloses a water-absorbing tube cleaner. The water-absorbing tube cleaner comprises a cylindrical metal barrel, macromolecular water-absorbing resin located in the cylindrical metal barrel, an arc-shaped water collector, balls inlaid into the barrel wall of the cylindrical metal barrel, flow guiding pipes arranged on the inner side of the barrel wall of the cylindrical metal barrel, a packing cup fixed to the tail end of the cylindrical metal barrel, and a packing cup tube cleaner connected with the tail end of the cylindrical metal barrel, wherein the barrel wall of the cylindrical metal barrel is of a hollowed-out netty structure; the arc-shaped water collector is arranged at the front end of the cylindrical metal barrel; the surface of the arc-shaped water collector is provided with a plurality of small holes; the surfaces of the flow guiding pipes are provided with a plurality of small holes; one ends of the flow guiding pipes are communicated with the small holes of the surface of the arc-shaped water collector, and the other ends of the flow guiding pipes extend into the bottom of the cylindrical metal barrel; the pipe walls of the flow guiding pipes make contact with the macromolecular water-absorbing resin. The water-absorbing tube cleaner is high in water-absorbing property and capable of cleaning up residual water in the low-lying positions of natural gas and oil product pipelines, and the corrosion and ice blockage phenomena of the pipelines are effectively relieved.

The invention discloses a domestic refrigerator freeze evaporator integrated assembly device and relates to the technical field of refrigerator equipment. The domestic refrigerator freeze evaporator integrated assembly device comprises a heater integrated assembly and a defrosting tray. The heater integrated assembly comprises a plastic shell terminal, fuses, a thermoplastic pipe and a heating pipe. Two ports of the heating pipe are connected with a power connection portion inside the plastic shell terminal, the heating pipe comprises an R-shaped heating pipe, a straight heating pipe and a curved heating pipe, a rectangular heating pipe formed by the R-shaped heating pipe and the straight heating pipe and the curved heating pipe arranged at one end are of an integrated structure, the two right-angle portions of the rectangular heating pipe are provided with the fuses, a freeze evaporator is installed inside the rectangular heating pipe, and side plates are arranged on the circumferential side of the curved heating pipe installed on the bottom face of the defrosting tray. The domestic refrigerator freeze evaporator integrated assembly device has an obvious heat transfer efficiency improving effect, the whole device can achieve intelligent defrosting and has a protection function for a system after assembling is completed, the product componentized supply capability is improved,and product assembling is easy.

The invention discloses a method for preparing fluidized ice, comprising the wet air condensing ice making circle and the refrigerant circle which are carried out simultaneously, wherein a cold source is provided for the wet air condensing ice making circle by the refrigerant circle. A device for making the flow ice by adopting the method comprises a wet air condensing ice making circle assembly and a refrigerant circle assembly, wherein the wet air condensing ice making circle assembly comprises an atmospheric condenser, a fan, an air volume control valve, an ice making room, a subcooled water thawing device, an ice storage tank and an ice-water separator; and the refrigerant circle assembly comprises an atmospheric condenser, a refrigerating compressor, an air condenser, an expansion valve and an ice making room. The invention ensures that the system is stable and energy-saving, the ice making efficiency is high, and the ice blockage is avoided.