CN105586009A - Inflammable mixture refrigerant being suitable at refrigerating temperature zone of -75 - -105 DEG C - Google Patents
Inflammable mixture refrigerant being suitable at refrigerating temperature zone of -75 - -105 DEG C Download PDFInfo
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Abstract
The invention relates to an inflammable mixture refrigerant being suitable at refrigerating temperature zone of -75 - -105 DEG C. The refrigerant includes: 1) R601a (isopentane); 2) R236Fa (hexafluoropropane) or R134a or a mixture of the two above; 3) R125 (pentafluoroethane), R32 (difluoromethane), or R507 or a mixture of any two selected above; 4) R23 (trifluoromethane); 5) R14 (carbon tetrafluoride); and 6) R50 (methane), wherein the total molar concentration of the six refrigerants hereinabove is 100%. The inflammable mixture refrigerant being suitable for the refrigerating temperature zone of -75 - -105 DEG C is simple in system and is reliable in performance. The mixture refrigerant is toxic-free, environment-friendly and zero-ODP. All the refrigerants employed are commercially popular, and are convenient to purchase and low in cost, so that the inflammable mixture refrigerant is more convenient to operate and master by maintenance technical operators.
Description
Technical field
The present invention relates to field of refrigeration, one is applicable to-75 degree～-105 degree refrigeration specificallyThe non-combustible mix refrigerant of warm area.
Background technology
Along with social development and scientific and technological progressive raising, bioengineering, medical medical science, the energy, communicationAnd the high speed development of the high-tech area such as military project, for the refrigeration product of-75 degree～-105 degree warm areasNeed more and more. For example freeze dryer, Parylene vacuum vapor deposition filming equipment, ultra low temperature freezerDeng product.
The general principle of three machine overlapping compression refrigerations is to utilize the cooling cycle system of a high temperature level, its steamingHair device is used for the condenser of cooling middle temperature level, the cooling cycle system of middle temperature grade, and its evaporimeter is used for coolingThe condenser of low temperature level, makes the pressure ratio ratio of evaporating pressure (condensing pressure with) of the refrigeration system of low temperature level littleIn 12. Reach the warm area of-75 degree～-105 degree, must use three compressors, design three covers relativelyIndependently refrigeration system can be worked normally; If expected if wherein there is a refrigeration system to haveProblem, so whole refrigeration system cannot reach the warm area of-75 degree～-105 degree. This structure existsThe shortcomings such as refrigeration system complexity, poor reliability, maintenance difficult, maintenance cost is high, power consumption is serious.
As everyone knows, business-like mixed non-azeotropic refrigerant 407A～407E at present, be by R32,The cold-producing medium of R125, tri-kinds of different boiling of R134a mixes with different concentration, due to each group of systemThe concentration difference that cryogen closes, the equivalent weight of showing out, the thermodynamic propertieses such as critical parameters, entropy enthalpy are eachDifference, and formed the mix refrigerant 407A～407E using in present refrigeration system. To sum up state and explainBright known different constituent element can form different mix refrigerants, even but the identical melting concn of constituent elementDifference, can form different mixtures equally. Existing complete business-like R507 cold-producing medium peace simultaneouslyFull property is categorized as A1, and its composition is to be categorized as A1 and R143 by R125 (50%) safe refrigerant(50%) safe refrigerant is categorized as that A2 mixes, and that is to say as long as control A1, A2The ratio of class cold-producing medium, just can obtain non-combustible or without the mixing system of propagation of flame A1 class completelyCryogen.
Prior art has as mix refrigerant in U.S. Patent Publication No. CN1388887A refrigeration systemUse argon (Ar) or nitrogen; The mix refrigerant of setting forth is different from mix refrigerant of the present invention completely;The whole process of refrigerastion of this patent uses three phase separator whole system structures of four heat exchangers multiple simultaneouslyAssorted, very loaded down with trivial details of production and processing technology, professional and technical personnel is not easy to grasp; Domestic patentCN101225291A realizes the warm area of-90 degree～-100 degree with a two-stage multiplex refrigerating system.This patent exists refrigeration system complexity, the tradition such as maintenance difficult in actual utilization and production processThe shortcoming of cascade refrigeration system; Its invention is simultaneously used the cold-producing medium of the kinds such as ethane, ethene completely differentWith the present invention; Domestic patent patent CN102559146A and domestic patent CN102660229A use systemCryogen kind is different from the present invention, and the same warm area of realizing is also different; Two cold-producing medium kinds that patent providesClass is too many, is not much the cold-producing medium that can conveniently buy on market, is not easy to especially professional and slapsHold and practical application and operation.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provides one to be applicable to-75The mix refrigerant of degree～-105 degree refrigeration warm area, the technical solution adopted for the present invention to solve the technical problemsBe: mainly contain six class cold-producing medium compositions: the first kind is R601a (isopentane); Equations of The Second Kind is R236Fa (sixFluoro-propane) or R134a; The 3rd class is R125 (pentafluoroethane) or R507; The 4th class is R23 (threeFluoromethane); The 5th class is R14 (carbon tetrafluoride); The 6th class is R50 (methane). Six kinds of cold-producing mediums mole denseDegree summation number is 100%, they separately shared molar concentration ratio scope be:
5%～15% of the shared total mol concentration of first kind cold-producing medium
10%～20% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
10%～35% of the shared total mol concentration of the 3rd class cold-producing medium
10%～20% of the shared total mol concentration of the 4th class cold-producing medium
10%～20% of the shared total mol concentration of the 5th class cold-producing medium
3%～10% of the shared total mol concentration of the 6th class cold-producing medium
Six kinds of cold-producing mediums according to molar ratio, carry out physical mixed under isoperibol, both can obtain mixing systemCryogen. Use the operation temperature area that this mix refrigerant can refrigeration system to reach-75 degree～-105 degree. This is mixedThe lubricating oil closing in cold-producing medium and system has good intersolubility, thereby oil appears in minimizing system in the time of low temperatureStifled fault; This mix refrigerant ODP is zero; The base stock that uses is America and Europe and most stateThe cold-producing medium of the environmental protection the most that family generally acknowledges; Make user reach that economy, environmental protection, system are simple, reliability completelyHigh multiple demand.
From the aspect of kind of refrigeration cycle, above-mentioned various cold-producing mediums are being brought into play the different use of doing. The first kind,Two class cold-producing mediums ensure compressor exhaust temperature in normal working range and play the effect of band oil; The 3rd class,The 4th class cold-producing medium plays the effect of cooling and cooling the 5th class in refrigeration system; The 3rd class, the 4th class,Five class cold-producing medium cold-producing mediums are groundwork material; The effect of the 6th class cold-producing medium improves the evaporation of system and pressesPower, reduce the pressure ratio of system in the time of low temperature, improve the COP of whole refrigeration system. The concrete proportioning of each warm area:
1, be applicable to-75 degree warm areas:
5%～10% of the shared total mol concentration of first kind cold-producing medium
10%～15% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
20%～35% of the shared total mol concentration of the 3rd class cold-producing medium
10%～15% of the shared total mol concentration of the 4th class cold-producing medium
13%～15% of the shared total mol concentration of the 5th class cold-producing medium
3%～5% of the shared total mol concentration of the 6th class cold-producing medium
2, be applicable to-85 degree warm areas:
5%～7% of the shared total mol concentration of first kind cold-producing medium
10%～14% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
15%～20% of the shared total mol concentration of the 3rd class cold-producing medium
25%～30% of the shared total mol concentration of the 4th class cold-producing medium
11%～17% of the shared total mol concentration of the 5th class cold-producing medium
4%～7% of the shared total mol concentration of the 6th class cold-producing medium
3, be applicable to-95 degree warm areas:
8%～15% of the shared total mol concentration of first kind cold-producing medium
13%～20% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
20%～30% of the shared total mol concentration of the 3rd class cold-producing medium
10%～15% of the shared total mol concentration of the 4th class cold-producing medium
13%～15% of the shared total mol concentration of the 5th class cold-producing medium
5%～8% of the shared total mol concentration of the 6th class cold-producing medium
4, be applicable to-105 degree warm areas:
10%～15% of the shared total mol concentration of first kind cold-producing medium
13%～20% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
20%～30% of the shared total mol concentration of the 3rd class cold-producing medium
10%～15% of the shared total mol concentration of the 4th class cold-producing medium
13%～15% of the shared total mol concentration of the 5th class cold-producing medium
6%～10% of the shared total mol concentration of the 6th class cold-producing medium
The invention provides the mix refrigerant of a kind of being applicable to-75 degree～-105 degree refrigeration warm areas, take theOne class cold-producing medium R601a (isopentane) and the 6th class are that total molar concentration sum of R50 (methane) is less than25％。
The invention provides the mix refrigerant of a kind of being applicable to-75 degree～-105 degree refrigeration warm area, when takingWhen Equations of The Second Kind cold-producing medium is R236Fa (HFC-236fa) or R134a, its molar concentration is: 15%～18%Molar concentration sum 13% in the time getting both mixtures.
The invention provides the mix refrigerant of a kind of being applicable to-75 degree～-105 degree refrigeration warm area, when takingWhen the 3rd class is the mixture of R125 (pentafluoroethane) or R507, its molar concentration is: 13%～15%;Molar concentration sum 13% in the time getting both mixtures.
The invention has the beneficial effects as follows: the invention provides one and be applicable to-75 degree～-105 degree refrigeration warm areasMix refrigerant, system is simple, dependable performance is simple in structure; Refrigeration section compared with cascade refrigeration systemPart has subtracted 1/3, and the system rate that breaks down reduces by 1/2, reliably Gao Xinggao more; Refrigeration system operating condition can be usedCommercial screw compressor or rotary compressor, price is low, and coefficient of refrigerating performance is high;
Improve 2-3 doubly than overlapping machine system, mix refrigerant is nontoxic, environmental protection, ODP coefficient are that 0 consumption ozone is divedCan be worth ODP less, cold-producing medium more meets environmental requirement, and the cryogen in mix refrigerant of the present invention is all,Meet Environmental Protection in America and organize the standard of EPA, SNAP and UL, meet the A1 safety of (ASHRAE)Graded category, workable, cold-producing medium of the present invention is all cold-producing medium popular on market, purchaserJust, price is cheaper; So convenient, maintenance technician grasps and does.
Brief description of the drawings
Fig. 1: the unit compression refrigeration circulatory system schematic diagram of the embodiment of the present invention
In figure: compressor 1, oil eliminator 2, condenser 3, device for drying and filtering 4, heat exchanger 5, capillaryPipe 6, evaporimeter 7, separation segregator 8; Expansion vessel 9, capillary 10.
Detailed description of the invention
Thermodynamic cycle process in conjunction with Fig. 1 mix refrigerant is: mix refrigerant extrudes from compressor 1; EnterEnter oil eliminator 2; Then enter condenser 3; Through device for drying and filtering 4; Enter and separate segregator 8 (notThe oil that can be separated by oil eliminator 2 is separated again; Through capillary 10; Enter heat exchanger 5Low pressure); Then enter heat exchanger 5; Through capillary 6; Enter evaporimeter 7; Through heat exchanger 5; EnterEnter to separate segregator 8; Through expansion vessel 9; Get back to compressor 1.
The non-combustible mix refrigerant of preparing degree～-105, unit compression refrigerating system-75 degree warm area, it comprisesSix class cold-producing mediums below: the first kind is R601a (isopentane); Equations of The Second Kind is R236Fa (HFC-236fa)Or R134a; The 3rd class is R125 (pentafluoroethane) or R32 (difluoromethane) or R507; The 4th classFor R23 (fluoroform); The 5th class is R14 (carbon tetrafluoride); The 6th class is R50 (methane).
Embodiment 1: configuration is used the mix refrigerant at-75 degree warm areas; Each class cold-producing medium molar concentrationAs follows:
The first kind: R601a accounts for 6% of total mol concentration
Equations of The Second Kind: when 15% or R134a of the shared total mol concentration of R236Fa its molar concentration be 14% orGet both mixture molar concentration sums 13%
The 3rd class: 23% or the shared total mol concentration of R507 of the shared total mol concentration of R125 24% orWhen the mixture of R125 and R507, its molar concentration is 13%
30% of the shared total mol concentration of the 4th class cold-producing medium
23% of the shared total mol concentration of the 5th class cold-producing medium
3% of the shared total mol concentration of the 6th class cold-producing medium
Operational factor is: condensation temperature 35 is spent, and cryogenic temperature is-75 degree, and pressure at expulsion 1.45MPa, steamsSend out pressure 0.46MPa, the delivery temperature 108 of compressor is spent.
Embodiment 2: configuration is used the mix refrigerant at-85 degree warm areas; Each class cold-producing medium molar concentrationAs follows:
The first kind: R601a accounts for 8% of total mol concentration
Equations of The Second Kind: when 15% or R134a of the shared total mol concentration of R236Fa its molar concentration be 15% orGet both mixture molar concentration sums 13%
The 3rd class: 25% or the shared total mol concentration of R507 of the shared total mol concentration of R125 25% orWhen the mixture of R125 and R507, its molar concentration is 13%
23% of the shared total mol concentration of the 4th class cold-producing medium
25% of the shared total mol concentration of the 5th class cold-producing medium
5% of the shared total mol concentration of the 6th class cold-producing medium
Operational factor is: condensation temperature 35 is spent, and cryogenic temperature is-85 degree, and pressure at expulsion 1.42MPa, steamsSend out pressure 0.43MPa, the delivery temperature 106 of compressor is spent.
Embodiment 3: configuration is used the mix refrigerant at-95 degree warm areas; Each class cold-producing medium molar concentrationAs follows:
The first kind: R601a accounts for 10% of total mol concentration
Equations of The Second Kind: when 17% or R134a of the shared total mol concentration of R236Fa its molar concentration be 17% orGet both mixture molar concentration sums 13%
The 3rd class: 20% or the shared total mol concentration of R507 of the shared total mol concentration of R125 20% orWhen the mixture of R125 and R507, its molar concentration is 13%
20% of the shared total mol concentration of the 4th class cold-producing medium
30% of the shared total mol concentration of the 5th class cold-producing medium
8% of the shared total mol concentration of the 6th class cold-producing medium
Operational factor is: condensation temperature 35 is spent, and cryogenic temperature is-95 degree, and pressure at expulsion 1.36MPa, steamsSend out pressure 0.4MPa, the delivery temperature 103 of compressor is spent.
Embodiment 4: configuration is used the mix refrigerant at-105 degree warm areas; Each class cold-producing medium molar concentrationAs follows:
The first kind: R601a accounts for 12% of total mol concentration
Equations of The Second Kind: when 17% or R134a of the shared total mol concentration of R236Fa its molar concentration be 17% orGet both mixture molar concentration sums 13%
The 3rd class: 20% or the shared total mol concentration of R507 of the shared total mol concentration of R125 20% orWhen the mixture of R125 and R507, its molar concentration is 13%
20% of the shared total mol concentration of the 4th class cold-producing medium
30% of the shared total mol concentration of the 5th class cold-producing medium
10% of the shared total mol concentration of the 6th class cold-producing medium
Operational factor is: condensation temperature 35 is spent, and cryogenic temperature is-105 degree, and pressure at expulsion 1.34MPa, steamsSend out pressure 0.35MPa, the delivery temperature 102 of compressor is spent.
Embodiment recited above is described the preferred embodiment of the present invention, not to thisBright design and scope limit, not departing under the prerequisite of design concept of the present invention, general in this areaVarious modification and improvement that logical engineers and technicians make technical scheme of the present invention, all should fall into thisBright protection domain, the technology contents of request protection of the present invention, has all been documented in claims.
Claims (5)
1. a non-combustible mix refrigerant that is applicable to-75 degree～-105 degree refrigeration warm areas, is characterized in that being made up of six class cold-producing mediums: the first kind is R601a (isopentane); Equations of The Second Kind is R236Fa (HFC-236fa); The 3rd class is R125 (pentafluoroethane) or R507; The 4th class is R23 (fluoroform); The 5th class is R14 (carbon tetrafluoride); The 6th class is that the molar concentration summation number of five kinds of cold-producing mediums of R50 (methane) is 100%. The molar concentration summation number of six kinds of cold-producing mediums is 100%, they separately shared molar concentration ratio scope be:
5%～15% of the shared total mol concentration of first kind cold-producing medium
10%～20% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
10%～35% of the shared total mol concentration of the 3rd class cold-producing medium
10%～30% of the shared total mol concentration of the 4th class cold-producing medium
10%～30% of the shared total mol concentration of the 5th class cold-producing medium
3%～10% of the shared total mol concentration of the 6th class cold-producing medium.
2. the cold-producing medium of a kind of being applicable to-75 according to claim 1 degree～-105 degree refrigeration warm area, is characterized in that being applicable to-75 degree warm areas:
5%～10% of the shared total mol concentration of first kind cold-producing medium
10%～15% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
20%～35% of the shared total mol concentration of the 3rd class cold-producing medium
10%～30% of the shared total mol concentration of the 4th class cold-producing medium
20%～25% of the shared total mol concentration of the 5th class cold-producing medium
3%～5% of the shared total mol concentration of the 6th class cold-producing medium.
3. the mix refrigerant of a kind of being applicable to-75 according to claim 1 degree～-105 degree refrigeration warm area, is characterized in that being applicable to-85 degree warm areas:
5%～8% of the shared total mol concentration of first kind cold-producing medium
10%～18% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
15%～25% of the shared total mol concentration of the 3rd class cold-producing medium
25%～30% of the shared total mol concentration of the 4th class cold-producing medium
15%～25% of the shared total mol concentration of the 5th class cold-producing medium
4%～7% of the shared total mol concentration of the 6th class cold-producing medium.
4. the mix refrigerant of a kind of being applicable to-75 according to claim 1 degree～-105 degree refrigeration warm area, is characterized in that being applicable to-95 degree warm areas:
8%～15% of the shared total mol concentration of first kind cold-producing medium
13%～20% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
20%～30% of the shared total mol concentration of the 3rd class cold-producing medium
10%～25% of the shared total mol concentration of the 4th class cold-producing medium
20%～30% of the shared total mol concentration of the 5th class cold-producing medium
5%～8% of the shared total mol concentration of the 6th class cold-producing medium.
5. the mix refrigerant of a kind of being applicable to-75 according to claim 1 degree～-105 degree refrigeration warm area, is characterized in that being applicable to-105 degree warm areas:
10%～15% of the shared total mol concentration of first kind cold-producing medium
13%～20% of the shared total mol concentration of Equations of The Second Kind cold-producing medium
15%～20% of the shared total mol concentration of the 3rd class cold-producing medium
10%～25% of the shared total mol concentration of the 4th class cold-producing medium
25%～30% of the shared total mol concentration of the 5th class cold-producing medium
6%～10% of the shared total mol concentration of the 6th class cold-producing medium.
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| CN108531135A (en) * | 2018-04-10 | 2018-09-14 | 龙志刚 | Mix refrigerant suitable for deep cooling warm area and preparation method thereof, application process |
| CN110305631A (en) * | 2019-07-03 | 2019-10-08 | 上海沛芾航天科技发展有限公司 | A kind of mixed working fluid refrigerant for environmental test chamber |
| CN116606632A (en) * | 2023-07-19 | 2023-08-18 | 中科美菱低温科技股份有限公司 | Refrigerant and method for producing the same |
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