31results about How to "Improve supercooling effect" patented technology

The invention provides a machine set. An outdoor processing unit heat exchanger consists of two parallel condenser tubes; and a supercooler is positioned between the two parallel condenser tubes of the outdoor processing unit heat exchanger. The refrigeration / heat cycle of the machine set is as follows: in a working condition of refrigeration, a refrigerant is condensed and supercooled, and then sent to an indoor air supply unit heat exchanger for heat exchange, and finally returned to a compressor, and the whole refrigeration cycle process is completed; and in the working condition of heating, the refrigerant is sent to the indoor air supply unit heat exchanger for heat exchange through the compressor, enters the supercooler for supercooling, enters the outdoor processing unit heat exchanger, and finally is returned to the compressor, and the whole heating cycle process is completed. Because the refrigerant is supercooled after a reservoir, the problem of lowering the supercooling degree is solved; because the supercooler is positioned between the two parallel condenser tubes of the outdoor processing unit heat exchanger, a strong airflow field formed on the middle part of a fan can be effectively utilized, and the actual supercooling effect of the system can be improved; and because of big suppercooling degree of the system, the operating stability and reliability of an expanding valve are improved, and the refrigerating capacity and the refrigerating energy efficiency of the system are also improved.

The invention provides a finely crystalline iron-stibium fiber and pumice magnesium alloy composite material and a preparation method thereof. The composite material has high strength, and excellent damping performance. The method has the advantages of simple process, low production cost and suitability for industrial production. The composite material has the magnesium alloy serving as a matrix, finely crystalline iron-stibium fibers and pumice microparticles are distributed on the matrix, the crystalline grains of the iron-stibium fibers are 1 to 10 mu m, and the fibers and the pumice account for 45 to 55 volume percent of the composite material, wherein the weight ratio of the fibers to the pumice is 1:1.

The invention provides a corrosion resistance coating for steel and a preparation method thereof. The coating has the advantages of excellent performance and good wear resistance. The preparation method has the advantages of simple process and low production cost and is suitable for industrial production. The corrosion resistance coating for steel comprises the following compositions in percentage by weight: 40-45 percent of alloy powder, 3.0-6.0 percent of boron nitride powder, 3-6 percent of silicon carbide powder, 7.0-8.0 percent of butanol powder and the balance of epoxy resin liquid, wherein the particle size of the alloy powder, the particle size of the boron nitride powder and the particle size of the silicon carbide powder are all 270-800 meshes. The alloy powder comprises the following compositions in percentage by weight: 35-40 percent of Zn, 0.01-0.1 percent of Mn, 0.2-0.4 percent of Cd, 0.2-0.4 percent of Sr, 0.02-0.05 percent of Si, 0.03-0.09 percent of Prm 0.05-0.2 percent of Gd and the balance of Al.

The invention provides refrigerating equipment. The refrigerating equipment comprises a freezing chamber used for containing frozen objects, a freezing circulating system comprising a compressor, a condenser, an expansion mechanism and an evaporator which are connected together, an air supply path used for conveying cool air generated by the evaporator, a pallet used for bearing the frozen objects in the freezing chamber and provided with a plurality of through holes, and a blower used for blowing the cool air conveyed by the air supply path towards the pallet on the lower portion in the freezing chamber, wherein the evaporator is used for generating refrigerating cool air through cooling; and an air supply cavity is formed in the bottom of the pallet and used for receiving the cool air conveyed by the air supply path and discharging the cool air through through holes in the bottom of the pallet upwards. Food is frozen effectively through supercooling so that the supercooling effect can be improved.

The invention provides air cooling type refrigeration equipment which comprises a freezing chamber, a freezing circulation system, a supply air path, a tray, a temperature sensor and an air blower. The freezing chamber is used for storing frozen food. The freezing circulation system comprises a compressor, a condenser, an expansion mechanism and an evaporator which are connected together, and refrigeration cold air is produced through cooling of the evaporator. The supply air path is used for conveying cold air produced by the evaporator. The tray is used for being fixed inside the freezing chamber and bearing the frozen food. The tray is provided with multiple through holes. The temperature sensor is used for being arranged at the bottom of the tray and detecting the bottom temperature of the frozen food. The air blower is used for blowing cold air conveyed by the supply air path towards the tray at the lower portion inside the freezing chamber. Food is efficiently frozen through supercooling, and therefore the supercooling effect is improved.

The invention provides a refrigeration device which comprises a freezing chamber, a freezing circulation system, a supply air path, a tray, a temperature sensor and an air blower. The freezing chamber is used for storing frozen food. The freezing circulation system comprises a compressor, a condenser, an expansion mechanism and an evaporator which are connected together, and refrigeration cold air is produced through cooling of the evaporator. The supply air path is used for conveying cold air produced by the evaporator. The tray is used for being detachably arranged inside the freezing chamber and bearing the frozen food. The tray is provided with multiple through holes. The temperature sensor is used for being arranged inside the freezing chamber and detecting the bottom temperature of the frozen food on the tray. The air blower is used for blowing cold air conveyed by the supply air path towards the tray at the lower portion inside the freezing chamber. Food is efficiently frozen through supercooling, and therefore the supercooling effect is improved.

The invention discloses a big supercooling degree machine room air conditioner. A condenser consists of two parallel condenser tubes; and a supercooler is positioned between the two parallel condensertubes of the condenser. The refrigeration cycle comprises that: a refrigerant is converted into high-temperature high-pressure gas by the compressor, enters the two parallel condenser tubes of the condenser to exchange heat with air and enters a high-pressure liquid reservoir; the refrigerant flowing out of the high-pressure liquid reservoir enters a supercooler for supercooling heat exchange andbecomes the refrigerant with a big supercooling degree; the refrigerant with the big supercooling degree is throttled by an expanding valve and enters an evaporator for heat exchange; and finally therefrigerant is returned to the compressor to complete the whole refrigeration cycle. Because the refrigerant is supercooled after the high-pressure liquid reservoir, the problem that the supercoolingdegree is lowered because the conventional refrigerant is supercooled and then enters the high-pressure liquid reservoir is effectively solved; and because of the big supercooling degree, the refrigerant does not bubble when passing the expanding valve, the operating stability and reliability of the expanding valve are improved, and the refrigerating capacity and the refrigerating energy efficiency of the system are also improved.

The invention provides a supercooling control method of refrigerating equipment. The supercooling control method comprises the steps that 1, after a supercooling mode is started, a compressor and a first air feeder operate intermittently; 2, when the temperature detected by a temperature sensor is lower than a first set temperature value T1, the compressor and the first air feeder operate continuously; 3, when the temperature detected by the temperature sensor is lower than a second set temperature value T2, the compressor and the first air feeder operate intermittently, and a second air feeder operates continuously; and 4, when the temperature detected by the temperature sensor is lower than a third set temperature value T3, the refrigerating equipment operates according to a conventional refrigerating mode, specifically, T1>T2>T3. Food is frozen efficiently through supercooling so that the supercooling effect can be improved.

The invention discloses a high-chromium chromium-molybdenum steel plate and a production method thereof. The steel plate is composed of the following components in percentage by weight: 0.09%-0.15% of C, 0.5%-0.90% of Si, 0.30%-0.60% of Mn, at most 0.007% of P, at most 0.005% of S, 8.00%-10% of Cr, 0.90%-1.1% of Mo, at most 0.20% of Cu, 0.05%-0.10% of Ni, at most 0.003% of Sb, at most 0.005% of Sn, at most 0.012% of As, and the balance of Fe and inevitable impurities. The production method comprises the following steps: smelting and die casting, heating and rolling, and heat treatment. The high-chromium chromium-molybdenum steel plate satisfies the requirements of high strength, high toughness and high processability for domestic power equipment industry, and can be widely used for manufacturing of domestic power equipment. The steel plate has the advantages of favorable cold bending property, no cracking in the material manufacturing process, and favorable resilience.

The invention provides a lightweight fine-grained copper fiber, pumice and magnesium alloy composite material and a preparation method thereof, and the composite material has high strength and excellent damping performance. The method has simple process and low production cost and is applicable to industrial production. The composite material takes magnesium alloy as a matrix, fine-grained copperfiber and pumice micro-particles are distributed on the matrix, and the grain size of the fine-grained copper fiber is 1-10 mu m; the two of the fine-grained copper fiber and pumice accounts for 45%-55% of the composite material by volume percent, wherein the weight ratio of the fiber to the pumice is 1:1; and the magnesium alloy matrix comprises the following chemical components by weight percent: 4%-8% of Al, 2%-4% of Zn, 0.5%-1% of Sn, 0.05%-0.15% of Pr, 0.003%-0.09% of Nd, 0.03%-0.09% of Dy and the balance of Mg.