31results about How to "Solve the problem of easy freezing" patented technology

The invention discloses a method and device for control over icing prevention and a generator. The method includes the steps that water inlet temperature and water outlet temperature of a heat exchanger are monitored; according to a water inlet temperature value and a water outlet temperature value, the step number of an electronic expansion valve is correspondingly adjusted. Through the water inlet temperature and the water outlet temperature of the heat exchanger, the step number of the electronic expansion valve is adjusted, the problem that in the prior art, water is prone to icing when a generator performs refrigeration is solved, a pipeline get smoothened, the amount of outlet water is more stable, and the condition that when severe icing occurs, the internal structure of a plate heat exchanger is expanded and damaged is prevented.

The invention discloses a solar water heater circuit for anti-freezing and rapid hot water output, which includes a water delivery pipe connected between the solar water heater tank and the hot water outlet, and an air storage tank connected with the tap water supply pipe to pressurize the water delivery pipe. Into the air; return pipe, connected between the water supply pipe and the solar water heater tank to return the drainage of the water supply pipe. The invention utilizes the pressure in the tap water supply pipe as power to drive the air to push the hot water in the pipe back to the water tank of the solar water heater after the user runs out of hot water. The recycling of hot water solves the problems of slow hot water output from solar water heaters and easy freezing of pipes in winter, and the hot water supply, hot water recovery and cold water supply functions of the present invention can be realized at the same time without interfering with each other, which is convenient for users .

The invention provides a drainage device for a high-speed motor train unit. The drainage device comprises a water collecting container and a drainage pipeline. The water collecting container comprises a shell and a cavity in the shell. The interior of the cavity is divided into a drainage cavity and a water inflow cavity through a partition plate. The drainage cavity and the water inflow cavity communicate with each other through a siphon installed on the partition plate. The top of the water inflow cavity is connected with a water inflow pipe. The top of the drainage cavity communicates with a drainage pipe inlet of the drainage pipeline through a water inflow pipe joint. The drainage pipeline is located outside the water collecting container. A drainage pipe outlet in the tail end of the drainage pipeline is located below the horizontal plane of the bottom of the water collecting container. By the adoption of the drainage device for the high-speed motor train unit, the structure is simple, washing wastewater can be effectively stored, and a low weight purpose can be achieved.

The present invention relates to a preparation method of a key intermediate of erlotinib hydrochloride, in particular to the preparation of 2-nitro- The method for 4,5-bis(2-methoxyethoxy) ethyl benzoate, the method comprises in the presence of the vitriol oil of catalytic amount, with acetic acid and acetic anhydride as solvent, 3,4-bis(methyl) Oxyethoxy) ethyl benzoate reacts with concentrated nitric acid. The invention has mild reaction conditions, fast reaction rate, high conversion rate and purity, safe and environmentally friendly process, and is easy to carry out industrialized production.

The invention discloses an innovative multi-protective function cable. The innovative multi-protective function cable comprises a conductor layer, a silica rubber layer arranged at the exterior of the conductor layer, an anti-biting layer arranged at the exterior of the silica rubber layer and an anti-freezing rain layer arranged at the exterior of the anti-biting layer, wherein the conductor layer comprises at least one conductor, wherein any one of the conductors is coated with a heat insulation layer, wherein the heat insulation layer is glass moving fabric or a casing which has been subjected to MQ silicon resin impregnation. The anti-biting layer comprises the following two groups of components in part by weight: 1) group A: 100 parts of silicon rubber, 10 parts of anti-feedant compound, 25 parts of inorganic filler, and 6 parts of hydroxyl silicone oil; and 2) group B: 0.5 to 0.8 part of vulcanizing agent. With the innovative multi-protective function cable of the invention adopted, rodents can be prevented from biting the cable, and therefore, the cable can adapt to a larger environment temperature range, and the application range of the cable can be extended, and the quality of the cable can be improved, and creepage trace can be detected in real time, and glazed frost, supercooled water, freezing rain and snow can be prevented from being attached on the surface of the cable.

The invention discloses a cable material for preventing freezing rain and a cable prepared therefrom. The cable includes a conductor layer, a protective layer covering the outer side of the conductor layer, and an antifreezing rain layer arranged outside the protective layer, wherein, The antifreeze rain layer includes the following components by weight: cationic quaternary ammonium salt: 100 parts by weight; ethyl acetate: 60 parts by weight; ethylene glycol monobutyl ether: 40 parts by weight. The cable of the present invention forms an anti-freezing rain layer outside its protective layer, which reduces the surface tension of the cable surface and prevents rime, supercooled water, freezing rain, and snow from adhering to the surface of the cable, thereby solving the problem that the cable is easily damaged in low temperature weather. The problem of icing can prevent the cable from being subjected to heavy loads and ensure the normal use of the cable.

The invention is concerned with the multilevel spray powder wetting method and the equipment and the powder non-dust car loader. It is: transports the outputting powder by the transporting equipment, processes the first order wetting to the powder in the transporting equipment, transports the un-wetting powder to a container to create dust, processes the second order wetting to the rising powder in the container, vents it. The invention can achieve the enough wetting of the powder, and control the dust, in order that the wetting powder is saturation status, which breaks through the traditional wetting governing localization.