62results about How to "Low GWP value" patented technology

A binary refrigerating apparatus employs a refrigerant composition that has a small global-warming potential (GWP) to be earth friendly, can be used as a refrigerant capable of achieving a low temperature of −80° C., and is excellent in refrigerating capacity and other performance. A refrigerant composition used as a low-temperature-side refrigerant is a refrigerant mixture including a non-azeotropic mixture in which 20% by mass or less of carbon dioxide (R744) is mixed to difluoroethylene (R1132a). A refrigerant composition used as a high-temperature-side refrigerant is a combination of: a non-azeotropic mixture comprising the refrigerant group of difluoromethane (R32), pentafluoroethane (R125), 1,1,1,2-tetrafluoroethane (R134a) and 1,1,3-trifluoro ethane (R143a); and 1,1,1,2,3-pentafluoropentene (HFO-1234ze), having a global-warming potential (GWP) of 1500 or less.

The invention provides an environmentally-friendly mixed refrigerant I. The environmentally-friendly mixed refrigerant I is characterized in that 1, 1, 2-trifluoroethylene, 1, 1-difluoroethylene, 1, 1, 2, 3, 3, 3-hexafluoropropylene, 1, 1-difluoromethane and other substances are added to trifluoropropene or tetrafluoropropene, thus the direct filling performance of the mixed refrigerant in an airconditioning system is improved. Additionally, the invention also provides an environmentally-friendly mixed refrigerant II. The environmentally-friendly mixed refrigerant II is characterized in that1, 1, 2, 2-tetrafluoroethane, 1, 1, 1, 2-tetrafluoroethane, 1, 1, 1, 2, 2-pentafluoroethane, 1, 1, 1, 2, 3, 3, 3-heptafluoropropane, trifluoroiodomethane, etc. are added in the abovementioned mixture,thus the flammability of the refrigerant is reduced. The invention also provides an environmentally-friendly mixed refrigerant III. The environmentally-friendly mixed refrigerant III is characterizedin that AlF3, FeF3, MgF2 and CuO nanoparticles are added in the abovementioned mixture, so that the intermiscibility of the refrigerant and mineral frozen engine oil can be improved.

The invention provides a refrigerant combination which can be directly filled to replace R22 in systems like domestic air-conditioners and heat pumps, and consists of pentafluoroethane(R125), 1,1,1,2-tetrafluorothane(R134a) and dimethylether(DME or RE170), the preparation method is that each component is done with physical mixture in liquid phase according to corresponding proportions, the refrigerant completely meets the requirements of environmental protection, the value of ODP is zero, the value of GWP is low, the thermal performance and parameters are rather near to R22, the pressure and the exhaust temperature of a compressor are lower than R22, the refrigerant can be directly filled without adjusting or exchanging any part or lubricating oil in present R22 systems, moreover, the cycle performance is similar to or slightly higher than R22.

The invention provides an environment-friendly foaming agent composition which comprises the following components in percentage by mass: 60-99% of 1, 1, 1, 3, 3-pentafluoropropane and 1-40% of 1-chloro-3, 3, 3-trifluoropropene. The GWP value of the environment-friendly foaming agent prepared by the invention is lower than that of a single medium HFC-245fa, the composition has the advantages of low GWP value, small heat conductivity coefficient and low energy consumption, and can reduce the heat conductivity coefficient and the integral energy consumption level, so that the composition is the best choice of high performance hard insulating foam.

The invention provides rigid polyurethane foam plastic and a preparation method thereof. The rigid foam plastic is prepared from the following components in parts by mass: 100 parts of combined polyol, 10-30 parts of a foaming agent composition and 120-150 parts of isocyanate, wherein the foaming agent composition comprises 10-30 parts of alkane, 10-30 parts of 1, 1, 2, 2-tetrafluoroethylmethyl ether and/or 1-10 parts of a hydrofluoroolefin foaming agent; the alkane comprises one or two of cyclopentane and isopentane; the hydrofluoroolefin foaming agent comprises one or two of 1-chloro-3,3,3-trifluoropropene and cis-1, 1, 1, 4, 4, 4-hexafluoro-2-butene. According to the invention, the more environment-friendly rigid foam plastic is provided, and the overall performance of the rigid polyurethane foam plastic is improved.

The invention belongs to the technical field of electrical equipment, and relates to arc extinguishing and/or insulating electrical equipment. According to the arc extinguishing and/or insulating electrical equipment of the invention, trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene or a mixed gas containing trans-1, 1, 1, 4, 4, 4-hexafluoro-2-butene is used as a medium-voltage and high-voltage arc extinguishing and/or insulating medium; the insulating medium has good electrical insulation and arc extinguishing performance, can greatly improve insulation capability, replaces the filling of SF6 in the arc extinguishing and/or insulating electrical equipment and reduces the influence of SF6 emission on the environment; and therefore, the problem of SF6 emission can be fundamentally solved, and theapplication temperature range of the arc extinguishing and/or insulating electrical equipment can be expanded.

The invention provides an air-conditioning heat exchanger using a mixed refrigerant and an air conditioner. The air-conditioning heat exchanger comprises a finned tube exchanger, a collecting pipe, at least two paths of shunting pipes, and a shunt for connecting the collecting pipe with each shunting pipe, wherein the collecting pipe is connected with an inlet end of the shunt; a shunting outlet of the shunt is connected with one end of the each shunting pipe respectively; the other end of the each shunting pipe is connected with a pipeline on the finned tube exchanger; and the air-conditioning heat exchanger is characterized in that: each shunting pipe is vertically arranged and has the same inner diameter of 2.0 to 3.5mm. The mixed refrigerant is a mixture of an HFC-32 (high-frequency current) refrigerant and an HFO-1234ze (high frequency oscillator) or HFO-1234yf refrigerant, and the HFC-32 refrigerant accounts for at least 50 percent of total weight of the mixed refrigerant. The problem of temperature glide of the mixed refrigerant brought by non-azeotropy can be solved. In addition, the heat exchange efficiency and heating capacity of the air-conditioning heat exchanger can be improved.

The invention discloses a flame-retardant aerosol paint for mine marking, which is composed of a propellant, a nonflammable quick-drying solvent, ethylene glycol monobutyl ether, a wetting and dispersing agent, an anti-settling agent, a film former, a filler and a colorant. The flammability test according to aerosol product classification in GHS (Globally Harmonized System of Classification and Labeling of Chemicals) proves that the flame-retardant aerosol paint belongs to a nonflammable product and does not need to make any mark of danger or flammability. The aerosol paint is an aerosol product, and is very convenient to use; the product can be matched with a 360-degree valve, and thus, can be sprayed and used in multiple directions (erected, up-side-down and the like); and the product can be matched with sprayers in multiple structures to achieve the effects of various line thicknesses and large-angle-sector spraying, thereby satisfying different use demands. The aerosol paint is mainly used in mine holes, playgrounds, roads, construction sites and other places, and can perform obvious and satisfactory color marking in the required position with various colors.

The invention provides a refrigerating agent composite which is used for replacing R410A in household air-conditioner/heat pump or other systems. The refrigerating agent is composed of difluoromethane (R32) and ethyl fluoride (R161); the preparation method is implemented by carrying out physical mixing on the above components at liquid phase in corresponding proportion. The invention does not damage ozonosphere in atmosphere, has lower GWP value, can reduce emission of greenhouse gases by above 69%, has thermotechnical parameters approximate to R410A, is compatible with pipelines, parts and lubricant of existing R410A system, can realize direct filling, is superior to R410A in thermotechnical performance, and has higher refrigerating efficiency and better energy saving effect after replacement.

The invention provides a car air-conditioning heat pump system adopting an environment-friendly refrigerant. The car air-conditioning heat pump system further comprises a compressor, an indoor side heat exchanger, a throttle valve and an outdoor side heat exchanger which are sequentially connected to form a closed loop, and the environment-friendly refrigerant adopted by the car air-conditioning heat pump system is prepared from four components in percentage by mass: 4%-8% of the first component, 4%-80% of the second component, 4%-88% of the third component and 4%-88% of the fourth component.GWP of the adopted refrigerant is less than or equal to 150, environment-friendly performance is good, and requirements of environment-friendly regulations in all global regions are met. Thermal performance of the car air-conditioning heat pump system is equivalent to or more superior to a refrigeration system heat pump system using R134a, and thus the car air-conditioning heat pump system adopting the environment-friendly refrigerant is used for replacing a car air-conditioning heat pump system adopting an R134a refrigerant.

The invention belongs to the technical field of refrigerants and discloses a mixed refrigerant containing 1,1-difluoroethane. 1-difluoroethane(R152a), 2,3,3,3-tetrafluoropropene(R234yf) and 1,1,1,2-tetrafluoroethane(R134a) form a tertiary mixture. The mixed refrigerant can reduce flammability of the R152a and enhance safety performance of the R152a, the dosage of HFO refrigerants can be reduced, the original investment cost of the refrigerant is lowered, and the environmental friendliness and safety performance of the mixed refrigerant are good. Besides, in work of a real system, the filling of the novel mixed refrigerant can be performed by slightly modifying a pure R134a refrigerating system.

The invention belongs to the field of hydrofluoroethers, in particular to a hydrofluoroether compound and a preparation method and an application thereof. The hydrofluoroether compound is representedby that follow formula: F [CF(CF3)CF2O]<x>-R<H>; where x = 2-7; RH=CH3, C2H5, n-C3H7 or i-C3H7. The hydrofluoroether compound provided by the invention only contains fluorine, the only halogen element, does not contain ozone-destructive substances, and is an environmentally friendly non-flammable heat transfer agent, a solvent and a cleaning agent.

The invention discloses halogenated hydrocarbon insulating gas and application thereof. The halogenated hydrocarbon insulating gas comprises halogenated hydrocarbon gas and the balance auxiliary gas. A volume fraction of the halogenated hydrocarbon gas is 15%-75%. Metal caps are arranged on the outer surfaces of disc springs in isolating blades of isolating switches of ring main units with the halogenated hydrocarbon insulating gas. The halogenated hydrocarbon insulating gas and the application have the advantages that sulfur hexafluoride gas can be replaced by the halogenated hydrocarbon insulating gas, the insulating strength of the halogenated hydrocarbon insulating gas is equivalent to the insulating strength of sulfur hexafluoride or even is higher than the insulating strength of the sulfur hexafluoride gas, the halogenated hydrocarbon insulating gas has certain arc extinction capacity, GWP (global warming potential) of CF3I (iodotrifluoromethane) in the halogenated hydrocarbon insulating gas is lower than 5 and is nearly equivalent to the GWP of carbon dioxide, and the exist life cycle of the halogenated hydrocarbon insulating gas in atmosphere is 0.005 year.

The invention belongs to the technical field of refrigerants of fixed commercial air conditioners and movable vehicle air conditioners, and particularly relates to a refrigerant used for replacing R-134A and a preparation method and application of the refrigerant. The refrigerant used for replacing R-134A provided by the invention is prepared from the following components in parts by weight: 10 to35 parts of fluoroethane; 25 to 60 parts of propylene; 20 to 50 parts of difluoroethane; and 15 to 45 parts of trifluoroiodomethane. The refrigerant used for replacing R-134A, provided by the invention, not only is very low in GWP, but also is energy-saving and environment-friendly, and has a very good market application prospect.

the invention discloses a magnesium and high-temperature flame-proof protective method of alloy, which consists of 0.02-1.15%HFC-125 and 98.85-99.98% current-carrying diluting gas, wherein the ratio of total bulk flow per min and copple inner-hole area of HFC-125 and current-carrying diluting gas is 35-150L/m2 when the magnesium and alloy fusing, thermal and cooling course resist flame; the ratio is 0.015-0.35L/L, when the fusing temperature is lower than flame-proof temperature.

The invention discloses an environment-friendly mixed refrigerant containing trifluoroiodomethane and a preparation method of the environment-friendly mixed refrigerant. The mixed refrigerant is prepared from the following substances in parts by weight: 0.1 to 37 parts of trifluoroiodomethane, 0.1 to 87 parts of difluoromethane, 1 to 26 parts of fluoroethane and 0.1 to 12 parts of fluoromethyl ether. The refrigerant provided by the invention has the characteristics of low GWP value, high safety and low toxicity.

The invention provides an environment-friendly mixed refrigerant and a refrigerating system. The environment-friendly mixed refrigerant comprises the following components in percentage by mass: 15-35% of fluoroethane, 41-80% of trifluoropropene and 1-30% of trifluoromethyl methyl ether. According to the environment-friendly mixed refrigerant, through the synergistic effect of all the components, the mixed refrigerant has a low GWP value; meanwhile, the trifluoromethyl methyl ether (RE143a) has the excellent flame retardant property which belongs to the A1 flammability grade, and therefore, the flammability of the environment-friendly mixed refrigerant can be weakened by adding the trifluoromethyl methyl ether (RE143a), and the mixed refrigerant has good safety performance; and the mixed refrigerant is adopted for refrigeration, volume refrigerating capacity and energy efficiency similar to the volume refrigerating capacity and energy efficiency of R134a can be obtained, and the problem that an existing refrigerant (R134a) is high in GWP value is solved.

The invention discloses a mixed refrigerant for replacing R507A, wherein the mixed refrigerant comprises the components in percentage by mass: 10% to 64% of difluoromethane, 1% to 67% of 1,3,3,3-tetrafluoroethylene, 5% to 21% of pentafluoroethane and 3% to 50% of iodotrifluoromethane. The mixed refrigerant disclosed by the invention has a relatively low GWP value and a zero ODP value, can obtain relatively good thermodynamic property parameters, and is good in environmental performance.

The invention discloses a refrigerant added with an amide compatibilizer. The refrigerant is prepared from the following components in parts by weight: 0.005-0.02 part of polyisobutylene succinimide, 0.01-0.05 part of a lubricant, 0.08-1 part of petroleum ether, 60-99 parts of 2,3,3,3-tetrafluoropropene, 0-30 parts of 2-bromo-3,3,3-trifluoropropene, 0-20 parts of alkane and 0-0.008 part of an N-octylpyridine tetrafluoroborate ionic liquid. The invention also discloses a preparation method of the refrigerant. The preparation method has the advantages of simple process, low cost, good product performance and environmental friendliness.

The invention belongs to the technical field of household and commercial small split air conditioner refrigerants, and particularly relates to a refrigerant replacing R-32, and a preparation method and an application of the refrigerant. The refrigerant replacing R-32 comprises the following components in parts by weight: 8 to 25 parts of isobutane, 20 to 45 parts of octafluoropropane, 30 to 60 parts of difluoroethane, and 10 to 25 parts of trifluoroiodomethane. The refrigerant replacing R-32 and provided by the invention not only is quite low in GWP, but also is energy-saving and environment-friendly.