CN1178547A - Difluoromethane/hydrocarbon refrigerant mixture and refrigeration cycle plant using the same - Google Patents
Difluoromethane/hydrocarbon refrigerant mixture and refrigeration cycle plant using the same Download PDFInfo
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- CN1178547A CN1178547A CN97190061A CN97190061A CN1178547A CN 1178547 A CN1178547 A CN 1178547A CN 97190061 A CN97190061 A CN 97190061A CN 97190061 A CN97190061 A CN 97190061A CN 1178547 A CN1178547 A CN 1178547A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/12—Inflammable refrigerants
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Abstract
The present invention provides a refrigerant mixture which scarcely effects the ozonosphere in the stratosphere, is less likely to cause global warming, and can be used as such together with conventional compressor lubricating oils other than ester oil in a conventional refrigeration cycle plant. The mixture comprises 80 to less than 100 % by weight of difluoromethane and at least one member selected among at most 20 % by weight of cyclopropane, at most 10 % by weight of isobutane, and at most 5 % by weight of butane.
Description
Technical field
The mix refrigerant of a kind of compound that the present invention relates to comprise methylene fluoride and select from the hydrocarbon compound that is used for producing the azeotrope-like mixture, and the refrigerating circulatory device such as air conditioning machinery, refrigerator that uses this refrigeration agent.
Background technology
Refrigerating circulatory devices such as existing air conditioning machinery, refrigerator connect compressor by pipe arrangement and thereby the throttling devices such as four-way valve, condenser, kapillary and expansion valve that are provided with as required, vaporizer, reservoir constitute refrigeration cycle, refrigeration agent is circulated therein can cool off or heat effect.In these refrigeration cycle, as refrigeration agent known have be referred to as freonll-11 (below be designated as ROO or ROOO), derive from and the halon that comes from methane or ethane.
In air conditioning machinery, refrigerator etc., normally in the about 0 ° scope of about 50 ℃ of condensing temperature, vaporization temperature, use as use temperature, wherein also widely with chlorodifluoromethane (CHClF
2, R22, boiling point-40.8 ℃) and be used as refrigeration agent.Because this R22 has the ability of destroying stratospheric ozone, thus its usage quantity and turnout are limited by the decision of Montreal international treaties, and stopping the tendency that it uses and produces in the future.In order to eliminate the influence to stratospheric ozone basically, not chloride in molecular structure is prerequisite, other the not chloride scheme of fluoridizing the hydro carbons alternative refrigerant that proposes to some extent as the refrigeration agent with this possibility.
For the performance of refrigerating circulatory devices such as air conditioning machinery, refrigerator, can consider methylene fluoride (CH
2F
2, R32, boiling point-51.7 ℃) and as substituting chlorodifluoromethane (CHClF
2, R22, boiling point-40.8 ℃), not chloride one of the back benefit refrigeration agent of hydro carbons of fluoridizing.
In addition, aspect the influence of warming up as the global climate commentaries on classics of another environmental problem, methylene fluoride (R32) is also favourable than R22.Being used for representing to the index that warm influence degree is changeed in the whole world is that the earth changes warm coefficient (below be designated as GWP), according to IPCC in 1994 (IntergovermentalPanel on Climate Change, climate change Intergovernmental Group) report is with carbon dioxide (CO
2) GWP tire out the comparative figure that transverse axis was located in 100 years when calculating as 1, GWP is 1700 for R22, GWP is 580 for methylene fluoride (R32), so methylene fluoride (R32) warm influence is changeed in the whole world can be approximately littler by 1/3 than R22.
But, methylene fluoride (R32) is except having weak flammable this shortcoming, because poor as the intermiscibility of the mineral oil of compressor lubricant oil and a part of synthetic oil always, so also exist the lubricating oil of from compressor, discharging to turn back to danger the compressor from cryogenic vaporizer with refrigeration agent with the past.Therefore, with the occasion of methylene fluoride (R32),, owing to adding water, easily decomposes ester oil, so must note the reliability of chemical material carefully though wish to use the good ester oil of intermiscibility to be used as compressor lubricant oil as refrigeration agent.
The present invention makes in view of above problem, and it can use the methylene fluoride (R32) that stratospheric ozonosphere is not had substantially influence and also might reduce the whole world warm influence of commentaries on classics with existing compression lubricating oil.The object of the present invention is to provide a kind of mix refrigerant, at least a compound that this mix refrigerant comprises methylene fluoride (R32) and selects from hydrocarbon compound, this hydrocarbon compound does not have influence substantially to stratospheric ozonosphere, warm also basic not influence is changeed in the whole world, and can be formed common fluorine sample mixture with methylene fluoride (R32).Because hydrocarbon compound is approaching with mineral oil and a part of synthetic oil on chemical structure,, might use with lubricating oil with the existing compressor beyond the ester oil so intermiscibility is good.
Disclosure of an invention
The present invention provides a kind of mix refrigerant in order to address the above problem, at least a compound that this refrigeration agent comprises not chloride methylene fluoride (R32) and selects from the hydrocarbon compound that is used for making the azeotrope-like mixture.
Being used for forming the hydrocarbon compound of azeotrope-like mixture with methylene fluoride (R32) can be from cyclopropane (C
3H
6, RC270, boiling point-32.9 ℃) or Trimethylmethane (i-C
4H
8, R600a, boiling point-11.7 ℃) or butane (n-C
4H
8, R600, boiling point-0.5 ℃) in select.
In addition, the present invention also the composition of the methylene fluoride (R32) of these mix refrigerants is set in from the minimum azeotrope-like of boiling point mix form near to the composition range the single R32 refrigeration agent.
In addition, the present invention also provides a kind of refrigerating circulatory device that mix refrigerant is used with the compressor lubricant oil beyond the ester oil, this mix refrigerant comprises from being used for forming at least a compound of selecting the hydrocarbon compound of azeotrope-like mixture with methylene fluoride (R32), its composition be set in near the minimum azeotrope-like mixing element of boiling point to the scope the R32 unitary system cryogen.
The simple declaration of accompanying drawing
Mix refrigerant boiling point under atmospheric pressure, the figure of dew point that Fig. 1 forms for the mixture that illustrates by methylene fluoride (R32) and cyclopropane (RC270).
Fig. 2 is the pie graph of an embodiment of the refrigerating circulatory device of use mix refrigerant of the present invention.
The most preferred embodiment of invention
In the present invention, methylene fluoride (R32) and a kind of compound of selecting from the hydrocarbon compound of cyclopropane (RC270) or Trimethylmethane (R600a) or butane (R600) become the minimum azeotrope-like mixture of boiling point in the compositing range more than methylene fluoride (R32) is approximately 80 weight %.
Azeotrope-like at this mixture is mixed in the composition, and the proportion of composing of methylene fluoride (R32) is than higher, more than about 80 weight %.So, when methylene fluoride (R32) the minimum azeotrope-like of boiling point mix form near during to the compositing range between the single R32 refrigeration agent, can think that methylene fluoride (R32) and the hydrocarbon compound that is used to form the azeotrope-like mixture are identical with proportion of composing cardinal principle in the gas phase in liquid phase.
The present invention is by forming the mixture of a kind of compound that comprises not chloride methylene fluoride (R32) and select from cyclopropane (RC270) or Trimethylmethane (R600a) or butane (R600) by aforesaid combination, with it as refrigeration agent, can be so that stratospheric ozonosphere not be exerted an influence basically, and the ODP in the specific composition scope also measurable be 0.
This mixture is owing to the hydrocarbon compound that is not only had basically by methylene fluoride more much smaller than the GWP of R22 (R32) and GWP constitutes, so the refrigeration agent that its mixing is obtained is also much smaller than R22 to the warm influence of whole world commentaries on classics.
Form the mixture of azeotrope-like by the qualification methylene fluoride (R32) and the compositing range of the mixture of hydrocarbon compound, can be so that in all integrants in refrigeration cycle, methylene fluoride (R32) is basic identical with the blending ratio of hydrocarbon compound, can utilize the intermiscibility between hydrocarbon compound and the ester oil compressor lubricant oil in addition, in common refrigerating circulatory device, use according to former state with lubricating oil with the compressor beyond the ester oil.Compressor not only can adopt mineral oil of the prior art, alkylbenzene oil with lubricating oil, and can also adopt ether system oil, fluorine is that wet goods adds the Undec lubricating oil of water.
In addition, the present invention is by mixing boiling point methylene fluoride (R32) and boiling point than R22 high cyclopropane (RC270) or Trimethylmethane (R600a) or the butane (R600) lower than R22, limit its compositing range to form the minimum azeotrope-like mixture of boiling point, can make its refrigeration capacity and coefficient of refrigerating performance greater than single R32 refrigeration agent, like this, though the vapour pressure that is higher than R22 is arranged, but be in about 0～about 50 ℃ scope in the use temperature of refrigerating circulatory devices such as refrigerator, refrigeration capacity is better than R22, coefficient of refrigerating performance is identical, thereby can will use the existing machine miniaturization of R22.
In addition, be limited to the minimum proportion of the intermiscibility that can improve methylene fluoride (R32) and compressor usefulness lubricating oil as hydrocarbon compound proportion of composing with this mixture, even then flammable R32 and hydrocarbon compound leak from device, also because the mix refrigerant that the hydrocarbon compound of R32 constitutes forms the azeotrope-like mixture, the blending ratio of R32 and hydrocarbon compound does not change basically during leakage, so can adopt the harm quick-fried countermeasure same with single R32 refrigeration agent.
This azeotrope-like mixture not only can be used as the refrigeration agent of refrigerating circulatory device, and can be used for propellant, whipping agent etc.
" embodiment 1 "
Table 1 illustrates and changes methylene fluoride (CH
2F
2, R32, boiling point-51.7 ℃) with cyclopropane (C
3H
6, RC270, boiling point-32.9 ℃) and mix refrigerant boiling point under atmospheric pressure during the proportion of composing of the mixture that forms.R32 and the formed mix refrigerant of RC270 are lower than each unitary system cryogen of R32 and RC270 at the occasion boiling point that the proportion of composing of R32 and RC270 is respectively about 80 weight % and about 20 weight %, and it consists of the minimum azeotrope-like of boiling point and mixes and form.The mix refrigerant vapor liquid equilibrium line 1 (boiling point, dew point) under atmospheric pressure that Fig. 1 constitutes for mixture that obtain from the boiling point of table 1, methylene fluoride (R32) and cyclopropane (RC270).For methylene fluoride (R32) for azeotrope-like mix to form promptly 80 weight % to 100 weight % less than scope in mix refrigerant, can think that R32 and RC270 are identical substantially with proportion of composing in gas phase in liquid phase.Therefore, be respectively in the compositing range of about 80～100 weight %, 0～about 20 weight %, can make the blending ratio of R32 and RC270 identical substantially in all integrants in refrigeration cycle at R32 and RC270.
Table 1
| R32/RC270 (weight %) | Temperature of saturation (℃) |
| ????0/100 ????50/50 ????70/30 ????75/25 ????80/20 ????85/15 ????90/10 ????95/5 ????100/0 | ????-32.9 ????-44.5 ????-51.9 ????-54.1 ????-55.1 ????-54.4 ????-53.5 ????-52.6 ????-51.7 |
" embodiment 2 "
Table 2 is the desirable refrigeration performance that is by 2 compositions that methylene fluoride (R32) and cyclopropane (RC270) constitute.
Condition is 50 ℃ of condensation medial temperatures, 0 ℃ of evaporation medial temperature, condensator outlet condensate depression 0deg, evaporator outlet superheating temperature 0deg.As shown in Table 2, for under atmospheric pressure approximately near-55 ℃ for the azeotrope-like composition, R32 and RC270 be respectively the composition of about 80 weight %, about 20 weight %, though be transformed into the many compositions of R32 in 0 ℃ of higher temperature and 50 ℃ of following azeotrope-like compositions, but, the evaporating pressure of the 2 compositions system that forms by the RC270 of the R32 of about 90 weight % and about 10 weight % and each unitary system cryogen that condensing pressure is higher than R32 and RC270, refrigeration capacity and coefficient of refrigerating performance are greater than single R32 refrigeration agent, and outflow temperature is less than single R32 refrigeration agent.In addition, the refrigeration capacity of the 2 compositions system that is made up of the RC270 of the R32 of 80～100 weight % and 0～20 weight % is better than R22, and coefficient of refrigerating performance equates, so can use the existing machine miniaturization of R22.In addition, thermograde in condensation process and evaporative process is below about 1deg, can similarly handle with the unitary system cryogen basically as the azeotrope-like mixture, particularly air heat exchanger is used for condenser or vaporizer, is suitable for being difficult to constitute refrigerating circulatory devices such as Lorentz lorentz's round-robin air conditioning machinery, refrigerator.
Table 2
" embodiment 3 "
| Refrigerant | ??????????????????????R32/RC270 | ||||
| Proportion of composing (wt%) | ??0/100 | ??70/30 | ??80/20 | ??90/10 | ??100/0 |
| Refrigeration capacity (R22 ratio) | ??0.753 | ??1.539 | ??1.644 | ??1.686 | ??1.621 |
| Coefficient of refrigerating performance (R22 ratio) | ??1.065 | ??0.968 | ??0.961 | ??0.962 | ??0.949 |
| Condensing pressure (MPa) | ??1.346 | ??2.954 | ??3.133 | ??3.206 | ??3.143 |
| Evaporating pressure (MPa) | ??0.353 | ??0.808 | ??0.862 | ??0.862 | ??0.813 |
| Outflow temperature (℃) | ??67.7 | ??84.2 | ??85.3 | ??88.8 | ??89.4 |
| Condensing temperature gradient (deg) | ??0.00 | ??3.06 | ??0.72 | ??0.00 | ??0.00 |
| Vaporization temperature gradient (deg) | ??0.00 | ??2.98 | ??0.26 | ??0.16 | ??0.00 |
Table 3
| R32/R600a (weight %) | Temperature of saturation (℃) |
| ????0/100 ????50/50 ????70/30 ????75/25 ????80/20 ????85/15 ????90/10 ????95/5 ????100/0 | ????-11.7 ????-51.6 ????-52.3 ????-52.4 ????-52.5 ????-52.6 ????-52.7 ????-52.6 ????-51.7 |
Table 3 illustrates and changes methylene fluoride (CH
2F
2, R32, boiling point-51.7 ℃) with Trimethylmethane (i-C
4H
8, R600a, boiling point-11.7 ℃) the proportion of composing of mixture the time mix refrigerant boiling point under atmospheric pressure.The mix refrigerant that R32 and R600a form is respectively under the composition of about 90 weight % and about 10 weight % at R32 and R600a, and boiling point is lower than each unitary system cryogen of R32 and RC600a, becomes the minimum azeotrope-like of boiling point and mixes composition.Therefore, be respectively in the compositing range of about 90～100 weight %, 0～about 10 weight %, can in all integrants of refrigerating circulatory device, make R32 identical substantially with the blending ratio of R600a at R32 and R600a.
" embodiment 4 "
Table 4
| Refrigeration agent | ?????????????????R32/R600a | ||||
| Proportion of composing (wt%) | 0/100 | ????70/30 | ??80/20 | ????90/10 | ?100/0 |
| Refrigeration capacity (R22 ratio) | 0.331 | ????1.220 | ??1.401 | ????1.604 | ?1.621 |
| Coefficient of refrigerating performance (R22 ratio) | 1.011 | ????0.988 | ??0.972 | ????0.991 | ?0.949 |
| Condensing pressure (MPa) | 0.684 | ????2.407 | ??2.737 | ????3.013 | ?3.143 |
| Evaporating pressure (MPa) | 0.156 | ????0.602 | ??0.706 | ????0.803 | ?0.813 |
| Outflow temperature (℃) | 50.0 | ????55.8 | ??82.8 | ????84.7 | ?89.4 |
| Condensing temperature gradient (deg) | 0.00 | ????11.50 | ??5.34 | ????1.08 | ?0.00 |
| Vaporization temperature gradient (deg) | 0.00 | ????12.90 | ??6.27 | ????0.48 | ?0.00 |
Table 4 for table 2 the same terms under 2 components formed by methylene fluoride (R32) and Trimethylmethane (R600a) be the desirable refrigeration performance of mix refrigerant.As shown in Table 4,2 components of being made up of the R600a of the R32 of 90～100 weight % and 0～10 weight % are that the refrigeration capacity of mix refrigerant is better than R22, and coefficient of refrigerating performance is identical, thereby can use the existing machine miniaturization of R22.In addition, thermograde in condensation process and the evaporative process is about below the 1deg, can similarly handle with the unitary system cryogen as the azeotrope-like mixture, particularly air heat exchanger is used for condenser and vaporizer, is suitable for being difficult to constitute refrigerating circulatory devices such as Lorentz lorentz's round-robin air conditioning machinery, refrigerator.
" embodiment 5 "
Table 5 illustrates and changes methylene fluoride (CH
2F
2, R32, boiling point-51.7 ℃) and butane (n-C
4H
8, R600, boiling point-0.5 ℃) and mix refrigerant boiling point under atmospheric pressure during the proportion of composing of the mixture that forms.
Table 5
| R32/R600 (weight %) | Temperature of saturation (℃) |
| ????0/100 ????50/50 ????70/30 ????75/25 ????80/20 ????85/15 ????90/10 ????95/5 ????100/0 | ????-0.5 ????-50.4 ????-51.2 ????-51.3 ????-51.4 ????-51.5 ????-51.7 ????-51.8 ????-51.7 |
Be respectively under the composition of about 95 weight %, about 5 weight % at R32 and R600, the boiling point of the mix refrigerant that R32 and R600 form is lower than each unitary system cryogen of R32 and R600, becomes the minimum azeotrope-like of boiling point and mixes composition.Therefore, be respectively in the compositing range of about 95～100 weight %, 0～about 5 weight %, can in all integrants of refrigeration cycle, make the blending ratio of R32 and R600 identical substantially at R32 and R600.
" embodiment 6 "
Table 6
| Refrigerant | ????????????????R32/R600 | ||||
| Proportion of composing (wt%) | ??0/100 | ????70/30 | ??80/20 | ????90/10 | ??100/0 |
| Refrigeration capacity (R22 ratio) | ??0.244 | ????1.083 | ??1.256 | ????1.525 | ??1.621 |
| Coefficient of refrigerating performance (R22 ratio) | ??1.042 | ????1.006 | ??0.969 | ????0.984 | ??0.949 |
| Condensing pressure (MPa) | ??0.497 | ????2.120 | ??2.502 | ????2.895 | ??3.143 |
| Evaporating pressure (MPa) | ??0.103 | ????0.499 | ??0.603 | ????0.747 | ??0.813 |
| Outflow temperature (℃) | ??50.0 | ????85.7 | ??88.0 | ????87.2 | ??89.4 |
| Condensing temperature gradient (deg) | ??0.00 | ????19.00 | ??10.38 | ????2.84 | ??0.00 |
| Vaporization temperature gradient (deg) | ??0.00 | ????21.10 | ??13.18 | ????3.08 | ??0.00 |
Table 6 be with table 2 the same terms under the desirable refrigeration performance of mix refrigerant of the 2 components system that forms by methylene fluoride (R32) and butane.
The refrigeration capacity that 2 components unshowned in table 6, that be made up of the R600 of the R32 of 95～100 weight % and 0～5 weight % are mix refrigerant is better than R22, and coefficient of refrigerating performance is identical, thereby can use the existing machine miniaturization of R22.In addition, can substantially similarly handle with the unitary system cryogen, be particularly suitable for air heat exchanger is used as condenser and vaporizer, is difficult to constitute refrigerating circulatory devices such as Lorentz round-robin air conditioning machinery, refrigerator as the azeotrope-like mixture.
" embodiment 7 "
Fig. 2 is arranged at an embodiment of outdoor refrigerating circulatory device for air conditioning machinery etc., inside at all-in-one-piece housing 2, with pipe arrangement connect compressor 3, four-way valve 4, the throttling devices 6 such as outdoor heat exchanger 5, kapillary and expansion valve that work as condenser and vaporizer, the indoor heat exchanger 7, the reservoir 8 that work as vaporizer and condenser, be connected in indoor and outdoor and make outdoor heat exchanger 5 and atmosphere heat exchange with the outdoor fan 9 of electric motor, indoor fan 10 makes indoor heat exchanger 7 and room air heat exchange.This refrigerating circulatory device is enclosed mix refrigerant and the ester oil lubricating oil of being made up of methylene fluoride (R32) and cyclopropane (RC270) in addition.When R32 and RC270 as refrigeration agent circulation time in refrigeration cycle, carry out cooling effect at indoor heat exchanger 7 as the occasion that vaporizer works, carry out heat effect at indoor heat exchanger 7 as the occasion that condenser works.Here, refrigeration agent is easy to liquid is turned back to compressor 3 when particularly heating the fate row, gas phase takes place in reservoir 8 separate with the composition of liquid phase.Be respectively the mix refrigerant that 2 components of about 80～100 weight %, 0～about 20 weight % are formed for R32 and RC270, even the component of gas phase and liquid phase takes place in reservoir 8 separates, but owing to form the minimum azeotrope-like mixture of boiling point, so the blending ratio of the RC270 in the liquid phase is identical substantially with the filling component, utilize the intermiscibility of RC270 and ester oil lubricating oil in addition, can guarantee to turn back to compressor 3 from cryogenic reservoir 8 with the lubricating oil that refrigeration agent is discharged together from compressor 3.In addition, mainly be trapped in the ester oil lubricating oil in addition in the compressor 3, even become high temperature at compressor 3, in refrigeration agent, contain under the state of small amount of moisture, also do not resemble to produce the ester oil and add water decomposition, the mix refrigerant that is made of R32 and RC270 can be used for common refrigerating circulatory device with lubricating oil according to former state with the compressor beyond the ester oil.As compressor lubricating oil, not only can use existing mineral oil, alkylbenzene oil, can also use ether system oil, fluorine is that wet goods does not produce the lubricating oil that adds water decomposition.The coefficient of refrigerating performance of the mix refrigerant that 2 components of about 80～100 weight %, 0～about 20 weight % constitute is identical, refrigeration capacity is superior because R32 and RC270 are respectively, so can will use cylinder volume and the outdoor heat exchanger 5 and indoor heat exchanger 7 miniaturizations of compressor 3 of the existing machine of R22.In addition, even flammable R32 and RC270 leak from device, because the mix refrigerant that R32 and RC270 form forms the azeotrope-like mixture, the blending ratio of R32 and RC270 does not change basically when leaking, so can adopt the harm quick-fried countermeasure same with the unitary system cryogen.In addition, using the mix refrigerant that constitutes by Trimethylmethane (R600a) or butane (R600) to replace the occasion of cyclopropane (RC270) inclosure, also can expect to obtain same effect.
The possibility of utilizing on the industry
By above explanation as can be known, 1 kind of compound that mix refrigerant of the present invention comprises difluoromethane and selects from the cyclopropane that is used to form the azeotrope-like mixture or iso-butane or butane, by cold-producing medium being formed the mixture that is only formed by compound not chloride in molecular structure, its compositing range is limited, can be obtained following effect.
(1) can enlarge basically not the range of choice of the cold-producing medium that stratospheric ozone layer is exerted an influence.
(2) since this mix refrigerant consisted of by the hydrocarbon compound that the little difluoromethane of climatic warming coefficient and climatic warming coefficient there is no, so the cold-producing medium that mixes is also little on the impact of climatic warming.
(3) be limited to the scope that forms the azeotrope-like mixture by the compositing range with the mixture of difluoromethane and hydrocarbon compound, it can be used for common refrigerating circulatory device with lubricating oil according to former state with the existing compressor beyond the ester oil.
(4) define mix refrigerant compositing range, that form by methylene fluoride and hydrocarbon compound, the use temperature of refrigerating circulatory devices such as refrigerator promptly about 0～about 50 ℃ scope in, though have the vapor pressure that is higher than R22, but refrigeration capacity is superior, and can obtain identical coefficient of refrigerating performance, therefore can will use the existing machine miniaturization of R22.
(5) even flammable methylene fluoride and hydrocarbon compound leak out from device, the mix refrigerant that is limited in the compositing range that forms the azeotrope-like mixture can adopt the explosion-proof countermeasure same with the unitary system cryogen.
(6) this azeotrope-like mixture not only can be used as the refrigeration agent of refrigerating circulatory device, but also can be used as propellant, whipping agent etc.
Claims (4)
1. a mix refrigerant is characterized in that: a kind of compound that it comprises the methylene fluoride of 80～100 weight % and selects from the hydrocarbon compound that is used to form the azeotrope-like mixture at least.
2. mix refrigerant as claimed in claim 1 is characterized in that: with composition be limited to from the minimum azeotrope-like of boiling point mix form near to 100 weight % less than the scope of methylene fluoride.
3. mix refrigerant is characterized in that: it comprise 80～100 weight % less than methylene fluoride, and a kind of compound selecting the cyclopropane below 20 weight % or Trimethylmethane below the 10 weight % or the butane below the 5 weight %.
4. refrigerating circulatory device, this device uses claim 1 or 2 described mix refrigerants with the compressor beyond the ester oil with lubricating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97190061A CN1178547A (en) | 1996-02-07 | 1997-02-06 | Difluoromethane/hydrocarbon refrigerant mixture and refrigeration cycle plant using the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20865/96 | 1996-02-07 | ||
| CN97190061A CN1178547A (en) | 1996-02-07 | 1997-02-06 | Difluoromethane/hydrocarbon refrigerant mixture and refrigeration cycle plant using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178547A true CN1178547A (en) | 1998-04-08 |
Family
ID=5178610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97190061A Pending CN1178547A (en) | 1996-02-07 | 1997-02-06 | Difluoromethane/hydrocarbon refrigerant mixture and refrigeration cycle plant using the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1178547A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6880361B2 (en) | 1999-12-28 | 2005-04-19 | Daikin Industries, Ltd. | Refrigerating device |
| CN103509520A (en) * | 2013-08-01 | 2014-01-15 | 广东美芝制冷设备有限公司 | Composition and compressor and refrigeration equipment using the composition |
-
1997
- 1997-02-06 CN CN97190061A patent/CN1178547A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6880361B2 (en) | 1999-12-28 | 2005-04-19 | Daikin Industries, Ltd. | Refrigerating device |
| US7003980B2 (en) | 1999-12-28 | 2006-02-28 | Daikin Industries, Ltd. | Refrigerating device |
| CN103509520A (en) * | 2013-08-01 | 2014-01-15 | 广东美芝制冷设备有限公司 | Composition and compressor and refrigeration equipment using the composition |
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