392results about How to "Avoid icing" patented technology

The invention relates to a wind wheel blade with antiicing and deicing functions, and the wind wheel blade comprises a shell, and a shear web capable of dividing the interior of the shell into a leading edge cavity and a trailing edge cavity, wherein a heating device is arranged in the leading edge cavity and consists of a heating type air blower arranged close to the root of the blade, and an insulating pipeline connected with the air outlet of the heating type air blower; the insulating pipeline is provided with a flute-shaped pipe with a gas orifice at the corresponding sections from the middle of the blade to the blade tip, and the opening direction of the gas orifice faces to the leading edge of the blade; and air flow exhausted by the gas orifice is circulated to the air inlet of the heating type air blower. The wind wheel blade is reasonable in pipe structure form and distribution mode, hot air flow focally heats the leading edge of the blade, especially the blade shell from the middle of the blade to the blade tip, so that the recycling of the hot air flow can be realized, and the utilization rate of heat can be improved.

The invention provides an intelligent circulation anti-icing method which can be applied to two to twelve and more split lead power transmission lines to transmit current. The method can be applied to any icing tension line section of a power transmission line and can accurately judge whether the icing prevention needs to be started or not automatically according to the line icing condition to realize the automation and the intellectualization of the whole anti-icing process. The method comprises the following steps of: mounting a control device; detecting the environmental parameter and judging whether the current environment needs to start the icing prevention or not by the control device; grouping sub-leads of the split lead; and when the anti-icing operation needs to be started, sequentially converging currents of all split leads at the transmitting end of the anti-icing section on each group of sub-leads according to preset interval time by the control device. The invention increases the transmission current of the sub-leads, achieves the aim of icing prevention by joule heat and can realize the automation and the intellectualization of the local or whole anti-icing process without adding an ice thawing power supply and the icing detection on the line and damage the icing condition before the generation of ice.

The refrigerator temperature control method includes following steps: dividing the work state of cold storage chamber into three temperature ranges for the compressor to start and stop, with each temperature range corresponding to one work setting; sampling the cold storage chamber temperature and transmitting the temperature to main control chip of refrigerator; and for the main control chip to control the compressor and the solenoid valve based on the sampled temperature and temperature setting. Utilizing the cold storage chamber temperature in the control of refrigerator can raise the refrigerator control effect and facilitate the selection of temperature sensor.

The invention discloses icing-resisting paint containing alkane phase change microcapsules and a preparation method thereof. The icing-resisting paint comprises the following components by weight percent: 1-50% of alkane phase change microcapsules, 1-50% of nano particles with a particle size of 30-80 nm, 1-85% of hydrophobic resin, 0-30% of curing agent and 10-90% of solvent. The preparation method of the icing-resisting paint comprises the following steps: preparing the alkane phase change microcapsules; and evenly mixing the alkane phase change microcapsules with the nano particles, hydrophobic resin, curing agent and solvent, so as to obtain the paint. The icing-resisting paint has the advantages that the preparation process of the icing-resisting paint is simple; the paint contains the alkane phase change microcapsules which can inhibit supercooling phase change, the phase change temperature interval of the microcapsules is an icing temperature range, and the microcapsules can generate phase change nearby an ice point; and a coating prepared from the paint can inhibit supercooling water from freezing on the surface of the coating.

The invention relates to the technical field of heat exchangers, and particularly provides a small liquefied natural gas (LNG) vaporizer which structurally comprises a shell. An LNG inlet, an NG (natural gas) outlet, a refrigerant inlet and a refrigerant outlet are arranged on the shell, and an inner pipe which is communicated with the LNG inlet is arranged in the shell. The small liquefied natural gas vaporizer is characterized in that a sleeve is arranged on the outer side of the inner pipe, and an inserting end of the inner pipe is communicated with the NG outlet via the sleeve. The small liquefied natural gas vaporizer has the advantages that in LNG vaporization and cold energy storage procedures, the small liquefied natural gas vaporizer can prevent refrigerants from freezing and is high in heat efficiency, is suitable for various LNG cold energy utilization places, and is particularly suitable for air conditioners of LNG automobiles or refrigeration for LNG refrigerator cars, and the like.

A method for constructing rubber particles asphalt concrete road surfaces relates to a method for constructing asphalt concrete road surfaces, aiming to resolve the problems that: the asphalt concrete road surfaces have weak wear-resistant, and the attachment coefficient and the adhesive force are reduced and vehicles have the problem of braking stability when the road surfaces are covered by snow and ice. The construction method comprises the following steps that: compositions by weigh percentage of the following materials are adopted: 76.5 to 91.5 percent of mineral aggregate, 2.5 to 7.5 percent of asphalt, 4 to 10 percent of mineral powder and 2 to 6 percent of rubber particles; the mineral aggregate is heated up to 190 to 200 DEG C, the rubber particles are added into the mineral aggregate with mixing about 20 to 25 seconds, the asphalt heated up in advance and the mineral powder are added into the rubber particles and the mineral aggregate with mixing lasting for 70 to 80 seconds, and then the road surfaces are subject to the pavement, the first stage initial pressure, the first and the second stage re-pressure and the second stage final pressure. The invention can increase the deformation capabilities of the road surfaces effectively, improve the bond state between the road surfaces and snow, and the invention can improve the attachment coefficient, increase the adhesive force, and improve the braking and turning operation stability of vehicles when the road surfaces are cover by snow and ice.

Under the device main body (14) of the liquid tank type thermal shock test device (13), a low temperature tank (15) and a high temperature tank (16) are arranged side by side with a heat insulating layer (17). Above the low-temperature tank (15) and the high-temperature tank (16), a sealed box (25) is provided, and an opening (26) is formed on the upper surface thereof. Above the box body (25), a sealing cover (37) capable of covering the opening (26) is arranged in a sealed state, and is driven up and down by the cover driving mechanism (41). On the sealing cover (37), a horizontal driving mechanism (39) is arranged, which can drive the fixing plate (34) left and right. On the fixed plate (34), a vertical drive mechanism (32) is installed to freely move the sample cage (31) downward. Accordingly, the sample cage (31) can be repeatedly immersed in the low-temperature tank (15) and the high-temperature tank (16) while the box (25) is sealed by the sealing cover (37).

The invention discloses an anti-icing material, a preparation method and an application of the anti-icing material. The anti-icing material comprises a cross-linked network polymer and paraffin, wherein the paraffin is selected from alkane with the carbon atom number of 10-60 or a mixture of the alkane. The invention also provides the preparation method of the material. A paraffin layer slowly released on the surface of an oil gel material is taken as a lubricating layer with the ultralow ice adhesion characteristic, and the low-temperature application range is wider; furthermore, PDMS body cross-linked network provides a support and a storage space for slow release of the lubricating layer, so that the oil gel lubricating layer can be stably and continuously used and becomes an ultralow-adhesion wear-resistant anti-icing material with an ultra-wide low-temperature application range.

The invention discloses a system and a method for comprehensively utilizing residual heat of a compressed natural gas engine (CNGE), which relates to a novel energy-saving technology of an engine. In the method, high-pressure fuel gas output by a high-pressure gas cylinder is heated with tail gas and/or the residual heat of water in a cylinder sleeve by using a residual heat exchanger, and the high-pressure fuel gas is depressurized and treated by using two stages of expansion machine devices (a variable-expansion-ratio expansion machine serving as one stage and a fixed-expansion-ratio expansion machine serving as the other stage), so that the fuel gas pressure needed by engine combustion is reached; meanwhile, pressure energy and residual heat are utilized comprehensively by using the expansion machines, so that the output shaft power of the engine is increased, the system efficiency of the engine is increased, the driving mileage is increased, and natural gas consumption is reduced. The device disclosed by the invention is compact in structure, and is reliable in performance; 80 percent of energy consumed in a natural gas compressing process is recovered, so that the advantage of natural gas serving as engine fuel gas is improved remarkably.

The invention discloses a novel method for starting and regulating working performances of a modified double heat pump bath hot-water system (i.e. a device for utilizing waste water and waste heat after bath to produce bath hot water). The method is implemented by adding a temperature-balancing tank and an electric heater at the water inlet end to shorten the start-up time and save water, and utilizing a three-way energy efficiency valve and a solenoid valve to regulate the volume of inlet waste water and thus to control the outlet water temperature. The invention has the advantages of high energy-efficiency ratio, rapid heating, and good start-up and temperature-regulation performances; and can work at a temperature below 5 DEG C.

The invention relates to an anti-icing cable applicable to ice rain atrocious weather and matched auxiliary facilities with anti-icing property. The anti-icing cable of the invention is characterized in that the cable is sleeved with an anti-icing sleeve, a clearance is reserved between the inner surface of the anti-icing sleeve and the surface of the cable, and the anti-icing sleeve can rotate relative to the cable. An insulating bottle for field power transmission is characterized in that the easy-icing surface of the insulating bottle is provided with the anti-icing sleeve. An anti-icing field metal tower body is characterized in that the surface of an easy-icing part of the tower body is provided with an anti-icing element. A method for arranging the anti-icing sleeve or the anti-icing element on the easy-icing part of the cable, the insulating bottle or the tower body effectively prevents the surface from icing, greatly reduces the heat exchange with the outside, and effectively prevents the icing phenomenon caused by heat absorption after rainwater is directly contacted with the cable, the insulating bottle or the tower body.

A non-stick coating, which inhibits frozen moisture accumulation, is applied to the exterior exposed portions of a refrigerant/air heat exchanger, which heat exchanger is comprised of a capillary tube/plate means/design, which plate has an exterior surface that is comprised of at least one of raised dots, ridges, trenches, and a flat surface, which means/design facilitates the shedding of frozen moisture and maximizes heat exchanger surface area exposure to the air; for use in conjunction with an air source heat pump system, an evaporative cooling system or a chiller, or as a supplement to a water-source heat pump system or to a direct expansion heat pump system; and for use with any other refrigerant-based heating system or cooling system.

A wind meter comprising a plurality of micro-electro-mechanical (MEM) differential pressure sensors positioned in a lobed housing, with an even number of circumferential ports arranged in an equally-spaced, circular pattern at the distal ends of the lobes of the housing, with tubes leading inward from the ports to the MEM sensors. The MEM sensors and other control system electronics are contained in the housing and are fully enclosed therein. The lobed housing structure does not impede/influence the movement of the wind as it passes and yet serves to prevent the ingress of moisture into the housing, thereby preventing fouling of the sensors. The tubular structures include an internal coating of hydrophobic material and are oriented at a slight angle from the horizontal in order to accomplish this protection. The openings at the ends of the tubular structures are positioned outside the fluid boundary layer.

An aircraft fuel system, comprising: a fuel tank; a fuel line; and an engine; wherein the fuel line includes a first conduit configured to carry fuel from the tank towards the engine, and a second conduit configured to carry fuel from the engine towards the tank, wherein one of the first conduit or the second conduit is disposed annularly around the other of the first conduit or the second conduit. Also, a method of operating the system. The system may be used to suppress ice formation in the first conduit and/or provide leakage detection.

A flexible cover having magnetic attachment is provided for sealing openings in a structure such as a heating, ventilation and air conditioning duct, an automobile window, or an automobile door handle or lock. Magnets or another suitable affixing device are attached at the periphery on one side of the cover. Alternatively, the magnets may be attached to one side of the cover by sandwiching the magnets between two opposing flexible covers. Gaps between the magnets permit the flexible cover to attach to objects having a curved or angular conformation. In operation, the cover is placed over the opening preventing the transmission of air, fluid material, or particulate material through the opening.

The invention discloses an air-cooled refrigerator which comprises a refrigeration chamber, a freezing chamber, a freezing air outlet fan and an air channel structure communicated with the refrigeration chamber and the freezing chamber. The air channel structure comprises an air inlet channel and an air return channel communicated with the air inlet channel. The air inlet channel comprises a first air inlet communicated with the refrigeration chamber and a second air inlet communicated with the freezing chamber. The air return channel comprises a first air return opening communicated with the refrigeration chamber and a second air return opening communicated with the freezing chamber. The freezing air outlet fan is arranged in the air inlet channel and blows airflow to the air inlet channel. An air return fan is arranged in the air return channel and blows airflow of the refrigeration chamber to the air return channel. The flow speed of cold airflow entering the freezing chamber from the air return channel is improved, the time consumed by the cold airflow entering the freezing chamber from the air return channel is shortened, and the air return openings of the freezing chamber of the air-cooled refrigerator are prevented from being iced.

An ice-protection system for an aerodynamic structure for an aircraft comprising: an outer skin defined by a leading edge point and a trailing edge point that are interconnected by an upper skin and a lower skin, an internal chamber defined within the outer skin configured to be in fluid communication with the atmosphere external to the outer skin via an inlet and an outlet, and at least one air heater provided within the chamber in proximity to the inlet, wherein during use, a pressure differential exists between the inlet and the outlet that causes external air to flow through the chamber from the inlet to the outlet, and wherein the heater is configured to heat the air passing through the inlet such that the temperature of the air in the chamber is sufficiently increased so as to prevent ice accretion on the outer skin.

The invention discloses an anti-icing device for power transmission lines. The anti-icing device mainly comprises a base, a support frame and a rain cover, wherein a drive shaft in the vertical direction is arranged on the support frame, the top of the drive shaft is connected with a wind cup for collecting wind power by a rod, an upper drive gear and a lower drive gear are fixedly arranged at the middle part of the drive shaft, the lower end of the drive shaft is connected with a steering guide device, an upper roller compound gear is arranged on the support frame on one side between the upper drive gear and the lower drive gear, and the upper roller compound gear is driven by the upper drive gear or the lower drive gear under the control of the steering guide device. The anti-icing device can travel on overhead ground wires by means of wind power without other power and travel positively and negatively by means of the steering guide device, and when the anti-icing device travels, a brush clears frozen rain, soft rime and flying snow attached to the overhead ground wires, so that the overhead ground wires are prevented from icing.