CN1990817B - CFC 12 replacement refrigerant - Google Patents

Abstract

A refrigerant composition comprising a hydrofluorocarbon component including 1,1,1,2-tetrafluoroethane (HFC 134a), the composition further comprising an additive selected from a saturated hydrocarbon or mixture thereof boiling in the range -5 to +70 DEG C.

Description

CFC12 surrogate cooling agent

Present patent application is the dividing an application that be on September 29th, 2000, denomination of invention the applying date for No. 00813689.0 patent application of " CFC12 surrogate cooling agent ".

The present invention relates to a kind of cooling agent, especially for but be not specifically designed to the cooling agent of air-conditioning system.Described system is particularly related to does not have dysgenic refrigerant compositions to atmospheric ozone layer, and relates to the composition in the compatible existing cooling agent of the lubricant that can be added to and be generally used for refrigeration and air-conditioning system.The invention still further relates to a kind of method of improving refrigeration system and air-conditioning system.

Contain chloro-fluorocarbon (CFC _s) for example CFC11 and CFC12 be stable, hypotoxic and non-flammable, being used in refrigeration system and air-conditioning system has low dangerous working conditions.When they were released, they can enter atmospheric layer and destroy and make environment avoid the ozonosphere of ultraviolet deleterious effect.Stop using CFC by the Montreal Agreement book-an international environmental agreement-requirement that surpasses 160 country's signatures gradually according to the timetable of agreeing _sIt comprises that also ozonosphere is also had dysgenic hydrogen chloro-fluorocarbon (HCFCS) now.

Any surrogate of CFC12 all must not consume the ability of ozone.The not chloride atom of composition of the present invention, so they do not have injurious effects to ozonosphere, and the performance of similar CFC12 working fluid is provided in the refrigeration system simultaneously.

In patent documentation, used various terms to describe refrigerant mixture.They can stipulate as follows:

Zeotrope: a kind of under specified temperature its steam and liquid form different fluid mixtures.

Temperature glide: if zeotrope liquid distills under constant voltage, its boiling point constantly raises so.Be called temperature glide from the variation of distillation beginning boiling point when liquid phase just disappears.When the saturation steam of zeotrope during condensation, also observes this slippage under constant voltage.

Azeotropic mixture: a kind of under specified temperature its steam and liquid form fluid mixture identical, that regulation is formed.Strictly speaking, for example be that the fluid mixture of azeotropic mixture may not be an azeotropic mixture also under the condenser condition under evaporator conditions.But as long as mixture is in its working range, satisfy afore mentioned rules under some temperature, the refrigeration document just may be called azeotropic mixture with this mixture.

Nearly blended mixts: a kind of like this blend, it seethes with excitement in very little temperature range, and little temperature glide is promptly arranged.

Remodeling refrigerant mixture: a kind of not chloride mixture that is used for fully substituting former CFC or HCFC cooling agent.

The filling agent refrigerant mixture: a kind of to retaining HCFC cooling agent mixture that add, not chloride when safeguarding, it is that a kind of cooling agent on top that pushes up is to improve seepage.

Hermetic compressor: a kind of like this compressor, electric motor as compressor in the casing of complete welded seal.Electric motor cools off with the refrigerant steam that returns compressor.The heat that electric motor produces is removed by condenser.

Semitight compressor: similar hermetic compressor; Main difference is that casing has bolt to connect, and it can be opened, and is convenient to electric motor and compressor keeps in repair.

Opentype compressor: a kind of with the compressor of exterior motor by the drive shaft of compressor case.The heat that electric motor produces directly is dissipated in the environment, rather than removes by condenser.This just makes it more effective slightly than the performance of hermetic compressor, leaks but cooling agent can occur in shaft seal place.

Unless add explanation in addition, percentage ratio and ratio that this specification sheets relates to are all represented with weight, select percentage ratio and ratio to amount to 100%.

Described according to an aspect of the present invention, a kind of refrigerant compositions is by 1,1, and 1,2-Tetrafluoroethane (R134a), pentafluoride ethane (R125) and a kind of boiling spread that is selected from are-5 to+70 ℃ the stable hydrocarbon or the additive composition of its mixture, and wherein the weight of R125 and R134a is

R125 1-17％

R134a 99-83％

The weight of preferred R125 and R134a is:

R125 2-15％

R134a 98-85％

The weight of preferred R125 and R134a is:

R125 9-13％

R134a 91-87％

The positive displacement compressor that uses in the refrigeration system is that piston compressor or rotary compressor suck minor amounts of lubricants from crankcase, discharges with refrigerant steam by outlet valve.In order to keep the lubricated of compressor, lubricating oil must be forced the circulation loop that centers on by cryogen flow, and returns crankcase.CFC and HCFC cooling agent can be miscible with hydrocarbon ils, thereby hydrocarbon ils is taken to around the circulation loop, but HFC cooling agent and hydro carbons lubricant have low mutual solubility, and therefore effectively hydrocarbon ils refluxes and can not occur.This problem especially severe in vaporizer, low temperature can make the viscosity of hydrocarbon ils be increased to there is enough to stop them to take tube wall to.Use CFCS and HCFCS, abundant cooling agent is stayed in the oil, viscosity is dropped to the oil backflow is occurred.

When use has the HFCS of hydro carbons lubricant, by the hydrocarbon fluid system of getting back to that will have following character oil is refluxed and become easy:

Sufficiently high solvability is arranged, so that make its viscosity degradation in lubricant under the temperature of vaporizer; And

Sufficiently high volatility can steam from lubricant in compressor crankcase.

Hydro carbons can satisfy these requirements.

Preferred hydro carbons additive is selected from 2-methylpropane, 2,2-dimethylpropane, butane, pentane, 2-methylbutane, pentamethylene, ethane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane and methylcyclopentane.Preferred Skellysolve A, pentamethylene, iso-pentane and composition thereof of using.Especially preferably use Skellysolve A or iso-pentane or its mixture.

In particularly preferred embodiment of the present invention, the preferred Skellysolve A of pentane, iso-pentane or its mixture and butane use together.This provides an advantage: can obtain near boiling point or near the azeotropic blend, so that just in case leak, can avoid generating combustible a high proportion of pentane from basin.

The quantity of hydro carbons additive can be trace to 10%, preferred 1-8%, 2-4% more preferably from about.Along with the quantity increase of hydro carbons additive, the quantity of R125 also can increase.

Can select the relative ratios of pentane and butane component like this, make it account for the 0.2-5% of composition, preferred 2-4%, more preferably 3-4%.Contain in the composition of 5% hydro carbons in total, or use its quantity to be the pentane of 0.2-2%, preferred iso-pentane and respective numbers butane as 4.8-3%.In the composition of＜5% hydro carbons, for example be 1% or 4%, can use higher butane/pentane ratio relatively, so that reduce the leakage that hydro carbons produces, therefore reduced flammable danger.

Particularly preferred composition contains:

R125 9.5％

R134a 88.5％

Pentane 2%

A selective composition contains:

R125 5％

Butane/pentane admixture 3-4%

R134a mends 100%.

Can use pentane/butane ratio is 1: 3 to 1: 8, preferred about 1: 5.

Refrigerant compositions of the present invention has several advantages.The existence of R125 descends the combustibility of refrigerant mixture.HFC content is high more, and more Skellysolve A is added in the mixture, contains for example dissolving properties of the mixture of mineral oil and alkylbenzene oil of conventional lubricant thereby improved.

Compare with R12, the present invention has many benefits, comprising lower trend that makes Global warming and lower outflow temperature.Compare with pure R134a, the present invention has many benefits, comprising bigger, with the ability of hydrocarbon ils compatibility and Geng Gao, thereby have better oil to reflux.

The present invention further describes with following embodiment, but without any the meaning that limits.

Fig. 1 is R134a+R125 as the key parameter of air-conditioning equipment performance in the R12 remodeling thing variation relation figure with the massfraction of R125.

Fig. 2 is R134a+R125 as the key parameter of air-conditioning equipment performance in the MAC R12 remodeling thing variation relation figure with the massfraction of R125.

Embodiment 1

In order to determine R125/R134a/ pentane composition suitability as the remodeling surrogate of R12 in sealing system or semitight system, estimated it with standard refrigerant cycles analytical technology.Select to analyze the operational condition of using and be typical condition in the air-conditioning system.Because blend is non-blended mixts, so select the mid point of temperature glide in vaporizer and the condenser like this, to determine the round-robin temperature range, identical temperature also is used to obtain the performance data of R12.

By the gross weight of R125/R134 blend, pentane is 4% (weight).In order to simplify calculating, a spot of like this pentane is omitted to be disregarded.

Studied and contained 1% and the composition of 15%R125.

In analysis, use following cycling condition:

Vaporizer

7.0 ℃ of fluid evaporator neutral temperatures

Overheated 5.0 ℃

Suction line pressure drop (in 1.5 ℃ of degree of saturated temperature)

Condenser

45.0 ℃ of fluid condensation neutral temperatures

Cross cold 5.0 ℃

Vent line pressure drop (in 1.5 ℃ of degree of saturated temperature)

Liquid line/suction line interchanger

0.3 ℃ of efficient

Compressor

0.85 ℃ of motor efficiency

0.7 ℃ of compressor isentropic efficiency

0.82 ℃ of compressor volume efficient

Secondary power

0.3 kilowatt of indoor fan

0.4 kilowatt of outdoor fan

0.1 kilowatt of controller

The result who uses these operational conditions to analyze the performance of conditioning unit lists table 1 in; In Fig. 1, key parameter is mapped.

All blends have lower outflow temperature than R12, so satisfy requirement of the present invention.

COP (system) is not less than 97% of R12.In whole dilution range, the refrigerating capacity of all compositions is all greater than 90% of R12.

Contain 〉=ability of the composition of 3%R125 is all greater than 95% of R12.Contain 〉=ability of the composition of 12%R125 is all greater than R12's.

For all compositions, outlet pressure is than 2 crust that are no more than of R12.

All compositions all satisfy requirement of the present invention.The composition that contains 9-13%R125 is special hope, and equilibrium good between outlet pressure and the ability is provided.

Embodiment 2

In order to determine R125/R134a/ pentane composition suitability as R12 remodeling thing in the air-conditioning system that moves, estimated described composition with standard refrigerant cycles analytical technology.The operational condition that the selection analysis is used is the representative condition of mobile air conditioner system.Strictly speaking,, be chosen in the mid point of temperature glide in vaporizer and the condenser like this, so that determine the round-robin temperature range because blend is a zeotrope.Identical temperature also is used to obtain the performance data of R12.

By the gross weight of R125/R134a blend, pentane is 4% (weight).In order to simplify calculating, this a small amount of pentane is omitted to be disregarded.

Studied and contained 1% and the composition of 17%R125.

Cycling condition below in analysis, having used:

Vaporizer

7.0 ℃ at fluid evaporator temperature mid point

Overheated 5.0 ℃

Suction line pressure drop (in 1.5 ℃ of degree of saturated temperature)

Condenser

60.0 ℃ at fluid condensing temperature mid point

Cross cold 5.0 ℃

Vent line pressure drop (in 1.5 ℃ of degree of saturated temperature)

Compressor

Compressor isentropic efficiency 0.7

Compressor volume efficient 0.82

Secondary power

0.4 kilowatt of condenser fan

The result who uses these operational conditions to analyze the performance in the conditioning unit lists table 2 in, and in Fig. 2 key parameter is mapped.

All blend R12 have lower outflow temperature, so satisfy requirement of the present invention.

In entire area, the refrigerating capacity of all compositions is all than the height of R12.

Contain be no more than 2 crust of the outlet pressure of the composition of 3%R125 at the most than R12.

For higher ability, in can standing the equipment of high pressure more, the R125 of 5-17% is preferred, particularly preferably is to contain 10-17%.

If maximum pressure is paid close attention to, the blend that contains 0-3%R125 so is preferred, and it increases ability, but clings to unlike the pressure high 2 of R12.These blends are nearly azeotropic mixtures.

Embodiment 3

Typically estimating R12 and several R134a/ or alkane composition in the refrigeration system, so that in R134a, use mineral oil that the suitable required minimum pentane quantity of oil backflow is provided in the typical refrigeration system of definite (a) operation in moderate temperature or high temperature application; And whether the mixture that (b) generates provides the effective performance and the pressure and temperature of similar system with the R12 operation.

The refrigeration system of using is 0.37 kilowatt of type Danfoss mode/DA05H/AAN air cooling hermetic compressor, and the design vaporization temperature is-6 to+10 ℃, and ability is 967-1861 watt/hour.This equipment is equipped with the telescoping vaporizer, and oily visor is contained on the compressor.System is equipped with 3G oil (150 viscosity), and as the operation of condensation system, makes the R22 vapor condensation from the cylinder top of heating.Condensate flow flows to second not cylinder of heating by gravity from evaporator/condenser.The R22 weight that is used in condensation in the set time process decides the ability of system.Manually be restricted to the R22 vapour stream of evaporator/condenser, so that different loading conditions to be provided.Per hour obtain all pressure, temperature, ability and current indication, and 6-8 hour data are average.Vent line is connected with evaporator inlet and carries out steam sampling, and the pentane of amount of calibration is added in the system.

3GS oil (150 viscosity) system of packing into.Described system is operated as the condensation system, so that make the R22 vapor condensation from the cylinder item of heating, condensation product flows to second not cylinder of heating by gravity from evaporator/condenser.Decide the ability of system with the R22 weight of condensation in the set time.Manually be restricted to the R22 vapour stream of evaporator/condenser, so that different loading conditions is provided.

In the stage 1 of test, system is at first used 1.2 kilograms of R-12 loading operations.It is following that the monitored and record of data---voltage, electric current, suction pressure, suction temperature, outlet pressure, outflow temperature, liquid line temperature, evaporator temperature, envrionment temperature, oil level, raw cylinder and reception cylinder temperature are to change process rate (kilogram/rice).These data are per hour measured once, and 18 hours results is average.In this time course,, and in-34 to-6 ℃ of temperature ranges, monitor by the temperature of controlling vaporizer that enters of restriction rinsing gas.

In the stage 2 of test, from system, remove all R-12, stay oil.About 90% R-134a with former R-12 weight of loading substitutes then.Note down oil level once more.Then the refrigeration system is operated a couple of days, the once above-mentioned data of each hour record.

Should be pointed out that in operation under the different loading conditions oil level in compressor is constant after many days.

Then 15 meters suction lines are added in the system, oil level is still constant.Stop oil to reflux then, oil level descends about 10 millimeters after operation a couple of days.

The pentane that will be former charging weight 2% to the maximum is added among the R-134a.After about 18 hours, oil level raises about 6 millimeters.

Other quantity pentanes that after this will be former cooling agent charging 6% to the maximum add, and add pentane at every turn and observe the less rising of oil level.

Reference table 3, about the test stage 2 (comparing) with the stage 1 can obtain following observed result.

Adding pentane is improved the oil backflow;

Ability is higher slightly under all loading conditions;

Energy consumption is low slightly under all loading conditions;

Average outlet pressure is higher slightly;

Average suction pressure is similar;

Average outflow temperature is higher slightly;

Average suction temperature is much higher; And

System operation or group body there is not tangible negative interaction.

Should be pointed out that the mixture of pentane concentration 〉=10% becomes combustible on the basis of naked light test, its percentage ratio is determined with the gas-chromatography area percent.

The mixture fractionation is significantly, and the percentage ratio of pentane changes to 20% or 6% (weight) of mixture from 1%.

It is believed that, may in compressor crankcase, be concentrated at termination cycle period pentane.

May draw such conclusion, with the mixture that drips the R-134a+2% pentane that shape supplies with provide oil to reflux for moderate temperature or high temperature R-12 commercial system and equate or better capability and more high efficiency surrogate, and equipment or operation are not had direct negatively influencing.The blend that contains greater than 2% pentane can be fractionated to flammable this point under certain conditions.There is the oily system of feeding of charging of a large amount of cooling agent oil and relatively small amount compressor crankcase can be easy to damage compressor, if the content of pentane reaches the concentration of the oilness that influences oil or the oily foamy concentration that forms when long-term stoppage in transit is turned round later again in oil.

Embodiment 4

In order to determine whether also can drip the surrogate of the form of shape surrogate, use the automative air conditioning system to estimate them as the automative air conditioning system as the R-12 that points out among the former embodiment, be best suited for commercial refrigeration system and several R134a/ pentane admixture.

Described air-conditioning system is the air-conditioning system of 1990Chrysler mini van (3.3 liters of engines).Existing R-12 charging in the air-conditioning system is recovered, and system is evacuated to the pressure of 300 μ m.As the 0.82 kilogram of R-12 that reinstalls of vehicular manufacturer's recommendation, at last temperature sensor is installed in the adjusting space of suction line vent line, evaporator air outlet and system then.

In the stage 1 of test, under dry run condition and 2000 rev/mins, measured suction pressure, outlet pressure, suction temperature, outflow temperature, the air themperature of leaving vaporizer, conditioned space temperature, envrionment temperature and the motor speed of system.The all data of record under stationary vehicle.

In the stage 2 of test, R-12 is recovered, and system is evacuated to 30 μ m pressure once more.Then with R-134a of charging 90% volume that equals former recommendation and the 2% pentane admixture system of packing into.The data that stage 1 of record picture test is identical.

At last, in the stage 3 of test, the R-134a/ pentane admixture is recovered, and once more system is evacuated to 300 μ m pressure.Use R-134a (88%)/R-125 (10%)/pentane (2%) system of packing into then.Note down identical data once more.

Reference table 4, in the stage 2 (when comparing) with the stage 1,

Outlet pressure mean height 8% (under idle running) and high by 4% (under 2000 rev/mins);

On average low 3% (under idle running) of outflow temperature and low 12% (at 2000 rev/mins);

Other temperature and pressure readings do not have considerable change;

Not significantly loss of ability in this system; And

Operation or assembly to system do not have tangible negatively influencing.

Reference table 5 is as can be seen in the stage 3

When 10%R-125 was added in the blend, temperature and pressure did not have obvious variation, and

Operation or assembly to system do not have tangible negatively influencing.

Embodiment 5

R-12 and several R134a/ pentane/R125 mixture have been estimated with the air-conditioning system of 2 liters of 1987Toyota Camry.

As in embodiment 4, present R12 charging is found time from the air-conditioning system, and the pressure of this system is dropped to 300 μ m.0.68 kilogram of R-12 then packs into as the vehicular manufacturer recommends.The air-conditioning system is equipped with temperature sensor in suction line, vent line, evaporator air outlet and adjusting space.

In the stage 1 of test, the air themperature that comprises suction pressure, outlet pressure, suction temperature, outflow temperature, leaves vaporizer, the data of setting up room temps, envrionment temperature and motor speed have been measured in dry run condition with under 2000 rev/mins.When stationary vehicle, note down all data.

In the stage 2 of test, from system, reclaim R-12, be evacuated to 300 μ m air pressures again.Then with R-134a (88%)/R-125 (10%)/pentane (2%) mixture that equals former charging 90% system of packing into.Then as in the stage 1, noting down data so.

Parameter list 6 can be found out in the stage 2 and (compare with the stage 1)

Outlet pressure mean height 18% under dry run condition, and at 2000 rev/mins of following mean heights 6%; And

Operation or assembly to system do not have tangible negatively influencing.

Can sum up from embodiment 4 and 5, the mixture that is used as the R-134a+2% pentane that drips the shape surrogate of R-12 in the automative air conditioning system has similar ability and equipment or operation is not had direct negative impact.10%R-125 is added in the said mixture not obviously influence of the pressure and temperature before the system.

Embodiment 6

R-12 and several R-134a/ pentane/R-125 composition have been estimated with family expenses rerigerator and refrigerator system.

In first test, use family expenses rerigerator system.The technical specification of described system is as follows:

Manufacturers: General Electric

Size: 198 liters

Power: 0.1 kilowatt

Type: the single evaporator of simple gate, band refrigeration chamber, frostless

Time limit of service: about 25-30

Cooling agent loading amount: 0.128 kilogram

Voltage: 115/1/60

Tensimeter is installed on suction line and the vent line.Temperature sensor is on compressor about 15 centimetres suction line and vent line.

In the fs, system is with existing R-12 cooling agent loading operation.The data that record is following: voltage, electric current, suction pressure, suction temperature, outlet pressure, outflow temperature, room temps, envrionment temperature and compressor operating time.

In subordinate phase, reclaim the R-12 charging, and system is evacuated to 300 μ m pressure.And then R-134a/ pentane (98/2%) mixture of about 90% (weight) of will feeding the originally system of packing into.Operate system once more, and by the identical data of above-mentioned record.

At last, in the stage 3, reclaim the R-134a/ pentane admixture, use again R-134a/R-125/ pentane (88/10/2%) mixture of the stages 2 equal amts system of packing into.Operate system once more, and by the identical data of above-mentioned record.

The result of this three phases lists table 6 in.

In second test, use the family expenses refrigerator.The technical specification of described system is as follows:

Manufacturers: Viking

Size: 482 liters

Power: 0.2 kilowatt

Type: cabinet type, frostless

Time limit of service: about 25-30

Cooling agent loading amount: 0.434 kilogram

Voltage: 115/1/60

Tensimeter is installed on suction line and the vent line.Temperature sensor is installed on compressor about 15 centimetres suction line and vent line.

In the fs, system is with existing R-12 cooling agent loading operation.And note down following data---voltage, electric current, suction pressure, suction temperature, outlet pressure, outflow temperature, room temps, envrionment temperature and compressor operating time.

In subordinate phase, reclaim the R-12 charging, and system is evacuated to 300 μ m pressure.R-134/ pentane (98/2%) mixture with about 90% (weight) of original charging reinstalls system then.Operate once more system with by the identical data of above-mentioned record.

At last, in the phase III, reclaim the R-134a/ pentane admixture, use R-134a/R-125/ pentane (88/10/2%) mixture of subordinate phase equal amts to replace then.Operate system once more, and note down identical data.

The data of all three phases are listed table 7 in.

Reference table 7, changing mixture is not as can be seen having obvious variation aspect working pressure, temperature or the efficient.Operation and assembly to system do not have tangible negatively influencing.

Conclusion is, the mixture as the R-134a+2% pentane that drips the state thing of R-12 in family expenses rerigerator and refrigerator has similar ability and equipment or operation are not had direct negatively influencing.10%R-125 is added in the said mixture operation to former pressure and temperature or system without any tangible influence.

Embodiment 7

Use the mixture of the R134a/R125/ iso-pentane/butane of 95/5/1/2% (weight) ratio, on commercial refrigeration system, carry out test in place.Refrigerant mixture is installed in the system, and carried out performance relatively with former testing data.The result lists table 9 in.In other pressure and temperatures, discharge the R134a/R125/ pentane blend of similar 88/10/2% ratio of ability and energy usage.Oil level remains unchanged in entire test.Should be pointed out that with iso-pentane/butane mixture replaces pentane that identical oil backflow character is provided; And point out that the content of R125 drops to 5% from 10% can not make degradation.

R-12 and R134a/ pentane admixture are relatively in the commercial refrigeration system of table 3

?	R-12?	R-134a+2％?	R-134a+4％?	R-134a+6％?
					High load condition	?	?	?	?
Suction pressure	1.72?	1.59?	1.79?	1.59?
					Suction temperature	6?	14?	13?	16?

Outlet pressure	8.4?	8.7?	8.4?	9?
					Outflow temperature	59?	59?	60?	63?
Ability	0.3?	0.32?	0.3?	0.29?
					Envrionment temperature	24?	21?	21?	26?
Electric current	9.96?	9.58?	10.5?	10.8?
					Intermediate load condition	?	?	?	?
Suction pressure	0.69?	0.83?	0.69?	0.83?
					Suction temperature	0?	14?	13?	17?
Outlet pressure	7.5?	7.8?	7.5?	7.8?
					Outflow temperature	56?	57?	58?	59?
Ability	0.14?	0.15?	0.14?	0.17?
					Envrionment temperature	25?	22?	24?	26?
Electric current	9.14?	8.78?	9.8?	10.04?
					Low loading condition	?	?	?	?
Suction pressure	-0.1?	0?	0.1?	0?
					Suction temperature	.17?	16?	19?	20?
Outlet pressure	5.8?	6?	7?	6.4?
					Outflow temperature	42?	46?	47?	49?
Ability	0.05?	0.05?	0.05?	0.04?
					Envrionment temperature	21?	21?	26?	25?
Electric current	8.7?	8.14?	9.43?	9.25?

Pressure is crust

Temperature is degree centigrade

Ability is kilogram/minute

Table 4R-12 and R-134a+2% pentane

Automobile A/C uses

Vehicle #11990Chrysler Mini-Van

Pressure is crust

Temperature is degree centigrade

Stationary vehicle

Table 5R-134a+ pentane and R-134a+R125+ pentane

Automobile A/C uses

Vehicle #11990Chrysler Mini-Van

Pressure is crust

Temperature is degree centigrade

Stationary vehicle

Table 6R-12 and R-134a/R-125/ pentane (88/10/2%)

Automobile A/C uses

Vehicle #21987Toyota Camry

Pressure is crust

Temperature is degree centigrade

Stationary vehicle

Table 7R-12 alternate test result

The family expenses refrigerator

?	R-12 100％?	R-134a/ pentane 98/2%	R-134a/R-125/ pentane 88/10/2%
				Suction pressure	0.34?	0.21?	0.21?
Suction temperature	22?	20?	17?
				Outlet pressure	8.5?	8.2?	8.33?
Outflow temperature	63?	60?	56?
				Room temps	3?	3?	1?
Envrionment temperature	27?	24?	22?
				Electric current	1.49?	1.47?	1.37?
Voltage	118?	117?	118?
				Runtime/24 hour	12.34?	10.64?	12.98?

Pressure is crust

Temperature is degree centigrade

Table 8R-12 alternate test result

The family expenses refrigerator

?	R-12 100％?	R-134a/ pentane 98/2%	R-134a/R-125/ pentane 88/10/1
				Suction pressure	0.17?	012?	0.17?
Suction temperature	17?	16?	12?
				Outlet pressure	9.24?	9.1?	9.8?
Outflow temperature	60?	53?	57?
				Room temps	-17?	-19?	-15?
Envrionment temperature	25?	22?	22?
				Electric current	3.72?	3.37?	3.74?
Voltage	117?	117?	118?
				Runtime/24 hour	13.92?	12.93?	13.27?

Pressure is crust

Temperature is degree centigrade

Table 9R-12 and R-134a/ pentane and R-134a/R-125 pentane and R-134a/R-125/ iso-pentane/butane

Commercial refrigeration systems

?	R-12?	Blend 1 R-134A/ pentane	Blend 2 R-134A/R-125 pentanes	Blend R-134A/R-125/ iso-pentane/butane
					Form % (weight)	100％?	98/2％?	88/10/2％?	92/5/1/2％?
High load condition	?	?	?	?
					Suction pressure	1.72?	1.59?	1.55?	1.72?
Suction temperature	6?	14?	14?	12.8?
					Outlet pressure	8.4?	8.7?	9.06?	9.31?
Outflow temperature	59?	59?	60?	61?
					Ability	0.3?	0.32?	0.32?	0.31?
Envrionment temperature	24?	21?	19?	20?
					Electric current	9.96?	9.58?	10.4?	10.13?
Intermediate load condition	?	?	?	?
					Suction pressure	0.69?	0.83?	0.67?	0.63?
Suction temperature	0?	14?	11?	12?
					Outlet pressure	7.5?	7.8?	7?	7.6?
Outflow temperature	56?	57?	58?	57?
					Ability	0.14?	0.15?	0.16?	0.17?
Envrionment temperature	25?	22?	19?	20?
					Electric current	9.14?	8.78?	9.48?	9.21?
Low loading condition	?	?	?	?
					Suction pressure	-0.1?	0?	0?	0?

Suction temperature	-17?	16?	16?	16?
					Outlet pressure	5.8?	6?	6.4?	7.2?
Outflow temperature	42?	46?	47?	49?
					Ability	0.05?	0.05?	0.06?	0.07?
Envrionment temperature	21?	21?	20?	22?
					Electric current	8.7?	8.14?	9.05?	9.03?
?	?	?	?	?

Pressure is crust

Temperature is degree centigrade

Ability is kilogram/minute

Claims (14)

1. refrigerant compositions of being made up of hydrogen fluorine carbon component and additive, described hydrogen fluorine carbon component are by 1,1,1, and 2-Tetrafluoroethane (R134a) and pentafluoride ethane (R125) are formed, and wherein the weight of R125 and R134a is:

R125 1-17％

R134a 99-83％；

It is stable hydrocarbon of-5 to+70 ℃ and composition thereof, wherein institute that described additive is selected from boiling point

State additive and be selected from Skellysolve A, iso-pentane and composition thereof, this additive further comprises butane;

Wherein to account for the weight ratio of described composition be 0.2-5% for pentane and butane.

2. according to the refrigerant compositions of claim 1, wherein said weight is:

R125 2-15％

R134a 98-85％

3. according to the refrigerant compositions of claim 2, wherein said weight is:

R125 9-13％

R134a 91-87％

4. according to the refrigerant compositions of claim 1, wherein said additive is the mixture of butane and Skellysolve A.

5. according to the refrigerant compositions of claim 3, wherein said additive is the mixture of butane and Skellysolve A.

6. according to the refrigerant compositions of claim 1, wherein said additive is the mixture of Skellysolve A, iso-pentane and butane.

7. according to the refrigerant compositions of claim 1, pentane wherein: the ratio of butane is 1: 3 to 1: 8.

8. according to the refrigerant compositions of claim 6, pentane wherein: the ratio of butane is 1: 3 to 1: 8.

9. according to the refrigerant compositions of claim 7, pentane wherein: the ratio of butane is 1: 5.

10. refrigerant compositions according to Claim 8, wherein pentane: the ratio of butane is 1: 5.

11. according to claim 1, one of 3 and 6 refrigerant compositions, wherein said additive further comprises and is selected from 2-methylpropane, 2,2-dimethylpropane, hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, methylcyclopentane and composition thereof.

12. according to claim 1,3,6,7,8,9, one of 10 refrigerant compositions, the quantity of wherein said additive is that trace is to 10%.

13. according to the refrigerant compositions of claim 11, the quantity of wherein said additive is 1-8%.

14. according to the refrigerant compositions of claim 12, the quantity of wherein said additive is 2-4%.

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