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

The invention provides a low-temperature-resistant liquid alkali-free accelerator and a preparation method thereof. The accelerator is composed of the following components in percentage by mass: 40-50% of aluminum sulfate, 5-10% of alcohol amine, 0.01-0.05% of a stabilizing agent, 4-6% of a reinforcing agent, 1-2% of a modified nano material, 1-2% of a pH conditioning agent, and 29.95-48.99% of water. By applying the accelerator, the defect that the conventional alkali-free setting accelerator is easy to freeze at low temperature can be effectively overcome, and the product stability, the concrete mechanical property and the durability are remarkably improved.

The invention relates to the technical field of air conditioners, and aims to solve the problem that an indoor unit, outdoor unit and unit connecting tube of an air conditioner are easy to freeze, thereby making the air conditioning refrigeration effect worse, or causing the phenomenon of leaking, pipe cracking and the like. Therefore, the invention provides a control method for the air conditioner, the air conditioner comprises a compressor and an outdoor unit, and the control method comprises the steps that an air intake temperature of the outdoor unit is acquired; and the frequency of the compressor is selectively adjusted according to the air intake temperature of the outdoor unit. The control method for the air conditioner has the advantages that the operating frequency of the compressor can be adjusted according to the temperature interval in which the air intake temperature of the outdoor unit is located, so as to avoid the freezing of the indoor unit, outdoor unit and unit connecting tube of the air conditioner, thereby effectively solving the problem that the indoor unit, the outdoor unit and the unit connecting tube of the air conditioner are easy to freeze, and the stability and reliability of the air conditioner operation are also improved.

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.

The invention discloses a solar water heater loop capable of preventing freeze and outputting hot water quickly. The solar water heater loop comprises a water supply pipe communicating between a solar water heater water tank and a hot water outlet, an air storage case which communicates with a tap water supply pipe and is used for pressing air into the water supply pipe, and a water return pipe connected between the water supply pipe and the solar water heater water tank to return water discharged by the water supply pipe. According to the invention, pressure in the tap water supply pipe is used as power to drive air to push hot water in the pipeline to flow back to the solar water heater water tank after a user uses the hot water, thus smartly utilizing excess energy in existing systems, realizing recycling of the hot water in the pipeline, and solving the problems of low hot water output speed of the solar water heater and large possibility of icing of pipelines in winter; and furthermore, the functions of hot water supply, hot water recovery and cold water supply can be achieved at the same time and do not interfere with one another, thus facilitating users in use.

The invention discloses a photovoltaic water heater which comprises a photovoltaic panel assembly, a water storage tank, a first controller and a heating element. The heating element is arranged in the water storage tank and is a low-voltage heating rod, the water storage tank is arranged in an indoor environment, a first temperature sensor is arranged in the water storage tank and is connected with an input end of the first controller, the photovoltaic panel assembly is connected with the low-voltage heating rod by a wire and a first control switch, and the first control switch is connected with an output end of the first controller. The photovoltaic water heater has the advantages that the low-voltage heating rod is used as the heating element, and can be normally started to work under the condition of insufficient illumination, accordingly, water can be heated, the problem that water can be heated by the aid of light energy only under the condition of sufficient illumination in the prior art can be solved, and the light energy conversion efficiency can be improved.

The invention discloses a water heating type double-cavity fuel tank control system based on intelligent control. The water heating type double-cavity fuel tank control system based on intelligent control involves a fuel tank assembly unit, a control module, an environment temperature module, an engine temperature module and a main fuel tank temperature module, the environment temperature module comprises an environment temperature sensor and is used for monitoring the temperature of the environment outside a vehicle in real time. According to the system, intelligent control is carried out ona six-way electromagnetic reversing valve and a direct-acting electromagnetic reversing valve through the control module, when the fuel temperature of a main fuel tank can not reach a preset standard,No.-35 diesel in an auxiliary fuel tank is used for starting an engine, when the fuel temperature of the main fuel tank reaches the preset standard, No.0 diesel in the main fuel tank is used for starting the engine, the problems that when the vehicle is in a running process, the cost is high due to use of higher-number fuel, the utilization rate is low due to use of lower-number fuel, and the lower-number fuel is easy to freeze in a cold region of the north and likely to generate a wax-hanging phenomenon are solved.

The invention discloses an anti-freezing water conveying system of a water transporting vehicle. The anti-freezing water conveying system comprises an equipment compartment and a heat insulation water tank, wherein the equipment compartment and the heat insulation water tank are located on a chassis of the vehicle. A water pumping pipeline system, a heating circulation pipeline system and an air heating system are arranged in the equipment compartment. The water pumping pipeline system comprises a pipeline damper I, a three-way valve I, a pipeline damper II, an engine pump, a pipeline damper III, a three-way valve II and a pipeline damper IV. The heating circulation pipeline system comprises an electric control water pump, a temperature sensor I, a heat exchanger and a solenoid valve. The air heating system comprises an air heater and a temperature sensor III. Compared with an existing water conveying system of the water transporting vehicle, the anti-freezing water conveying system solves the problem that the water transporting vehicle can easily freeze in a cold environment, achieves normal water transportation and conveying on long-distance, short-distance and various other working conditions, is high in automation degree, achieves the purposes of automatic heating and heat preservation and is applicable to various road surfaces since damping measures are adopted for the pipeline systems.

The invention discloses a cryogenic separation device with ethylene removal, dehydrogenation, demethanization and denitrification functions. The cryogenic separation device with the ethylene removal,dehydrogenation, demethanization and denitrification functions comprises a molecular sieve adsorption unit, a cryogenic separation device cold box unit and a CO circulating compressor unit, wherein the molecular sieve adsorption unit communicates with the cryogenic separation device cold box unit, and the cryogenic separation device cold box unit communicates with the CO circulating compressor unit; mixed gas is delivered into the molecular sieve adsorption unit to be purified, the purified gas enters the cryogenic separation device cold box unit to be separated, and the CO circulating compressor unit provides a pressure for the cryogenic separation device cold box unit. The cryogenic separation device has the ethylene removal function and can separate out obtained high-purity product gas,the purity can reach 90% or over, the content of H2 and the content of CH4 in the gas are smaller than 50 ppm, and the recovery rate is high; and the problem that ethylene and methane are likely to be frozen in the separation process can be solved; and energy consumption is low, the investment is small, and adjustment is easy.

The present invention relates to an erlotinib hydrochloride key intermediate preparation method, particularly to a method for high reaction rate, high purity and high yield preparation of 2-nitro-4,5-bis(2-methoxyethoxy) ethyl benzoate from 3,4-bis(methoxyethoxy)ethyl benzoate, wherein in the presence of a catalytic amount of concentrated sulfuric acid, 3,4-bis(methoxyethoxy)ethyl benzoate and concentrated sulfuric acid are subjected to a reaction by using acetic acid and acetic anhydride as a solvent. According to the present invention, the method has characteristics of mild reaction condition, rapid reaction rate, high conversion rate, high product purity, safety and environmental protection, and is suitable for industrial production.

The invention discloses an LNG vaporization device. The device comprises an LNG vaporization tank, a heater and a circulating pump, the LNG vaporization tank comprises an LNG vaporization tank inlet, a natural gas inlet and a natural gas outlet, and the heater comprises a heating pipe, a natural gas inlet connected with the natural gas outlet of the LNG vaporization tank through a pipeline, a circulating gas outlet located in the middle of the heating pipe of the heater and a natural gas outlet. An inlet of the circulating pump is connected with the circulating gas outlet of the heater through the pipeline, and an outlet of the circulating pump is connected with the natural gas inlet of the LNG vaporization tank. By arranging the LNG vaporization tank, the problem that the vaporization device is slow in effect speed and easy to freeze is solved.

The invention provides a diesel oil thawing device, which comprises an engine, a radiator, a water circulating pump, a tank, an oil pump, a sediment bowl, a water pipe and an oil pipe. An accessory tank is added on the tank. The oil in the accessory tank is nonfreezing oil and is to be used for starting up an engine. Two kinds of oil are exchanged through a T-joint transfer switch. Diesel oil thawing units are connected in the cooling water circulation pipeline of the engine and a pipeline between the tank and the T-joint transfer switch in series. The frozen diesel oil in the tank enters the diesel oil thawing units through high large diameter pipelines, and is thawed through the heating-up of circulated hot water under the action of the oil pump before the thawed diesel oil passes through the T-joint transfer switch and the sediment bowl, and enters the engine for use. The invention has simple structure and is manufactured conveniently. By adopting the invention, diesel oil of large numbers can be used under low temperature, and RMB 0.3 can be saved per litre of diesel oil. As a lot of engines use diesel oil, the invention can save diesel oil and resources significantly, and remarkably reduce the cost.

The invention discloses a composite constructed wetland structure suitable for a cold region. The composite constructed wetland structure comprises a water distribution tank, a vertical subsurface flow type constructed wetland, a horizontal subsurface flow wetland and an oxidation pond multi-stage combination. wastewater firstly flows into the water distribution tank to be pretreated, and gravels and large suspended solids are removed. Then the wastewater flows into the vertical subsurface flow type constructed wetland for percolation treatment, then passes through the horizontal subsurface flow wetland and finally flows into the oxidation pond. The vertical subsurface flow type constructed wetland comprises a descending vertical constructed wetland unit and an ascending vertical constructed wetland unit, the three columns of constructed wetland pool bottom inner bed layer filling matrixes are of a layered structure, and plant combinations are planted at the top of a filler layer. The upstream of the pool body is provided with a water inlet groove, two sides of the pool body are respectively provided with a water outlet groove, multi-point water distribution is adopted, and the bottom is provided with a drain pipe and connected with a hose. The problem that in the prior art, an artificial wetland is prone to freezing or blocking under the low-temperature condition and consequently shutdown is caused can be effectively solved, the water purification efficiency is improved, a good landscape zone is built, and the occupied area is saved.

The invention provides a pressure sensor, a substrate structure and a manufacturing method thereof. The substrate structure for the pressure sensor comprises a substrate, a pressure hole is formed inthe substrate in a penetrating mode, the pressure hole comprises a straight hole and a taper hole which are arranged in the first direction, the taper hole is formed by extending from the hole edge ofthe straight hole, and the hole diameter of the taper hole is gradually widened in the first direction.

The invention discloses an ethylene low-temperature purification device, which is mainly used for treating tail gas generated in a synthesis process or an ethylene production process taking ethylene as a raw material, such as defoaming gas generated in a preparation process of a vinyl acetate-ethylene copolymer, tail gas generated in an ethylene production process and the like. The process tail gas generally contains ethylene, vinyl acetate or heavy components, nitrogen, methane, ethane, oxygen, carbon dioxide, water or methanol and the like, and ethylene product gas with the purity reaching 99.5% (mole) or above can be obtained through the device. A cryogenic separation cold box unit integrating a molecular sieve adsorption purification unit, a plate-fin heat exchanger (6/40/41), a heavy component separation tank, an ethylene separation tank or an ethylene purification tower, a low-temperature separation cold box unit of an ethylene storage tank or a liquid refrigerant siphon tank, a refrigerant compressor unit and a connecting pipeline is adopted by the device, the device has the characteristics of low energy consumption, small investment, easiness in adjustment and the like, and the overall economic benefit of an enterprise is improved.

The invention belongs to the technical field of fire fighting equipment, and particularly relates to a fire fighting truck water opening heating system. The heating system comprises an engine, a thermostat, an engine exhaust pipe, a cooling liquid conveying pipe, a water opening heating device, a first booster pump, a fire fighting truck water inlet and a fire fighting truck water outlet. The heating system has the advantages that the cooling liquid conveying pipe is attached to an exhaust pipe of an engine, cooling liquid in the cooling liquid conveying pipe is conveyed to a warm air system of a fire fighting truck through the booster pump and finally flows back into the engine, the warm air system of the fire fighting truck can be rapidly heated through the design, and the problem of rapid heating in the truck in winter is solved; and besides, the cooling liquid conveying pipe is attached to the engine exhaust pipe, waste heat of engine tail gas is used for heating the cooling liquid, the heated cooling liquid communicates with the water opening heating device, the water inlet and the water outlet of the fire fighting truck are heated through generated heat, and the problem that the peripheries of the water inlet and the water outlet are prone to freezing in winter is solved.

The invention provides a gas turbine engine fuel oil and lubricating oil thermal management and anti-icing comprehensive control system which comprises a main fuel oil system, a lubricating oil system, an engine inlet rectification supporting plate and a control system, the main fuel oil system further comprises a first valve, the first output end of a main fuel oil regulator is connected with the engine inlet rectification supporting plate, and the second output end of the main fuel oil regulator is connected with the control system. The first valve is arranged on the connecting pipeline; the lubricating oil system further comprises a second valve, the first output end of the lubricating oil scavenging pump is connected with the engine inlet rectifying supporting plate, the second valve is arranged on a connecting pipeline, and the first valve and the second valve are both connected with the control system. While heat dissipation and anti-icing requirements of a heat management system are met, heat sink of an engine system is fully excavated, and anti-icing bleed air of the engine is reduced.