JP3612805B2 - refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator that can reduce the amount of refrigerant and that can also reduce the global warming potential.
[0002]
[Prior art]
Currently, air conditioners are becoming longer piping and chargeless. Along with this, the refrigerant charging amount tends to increase. However, when the refrigerant filling amount is increased, there is a problem that liquid compression occurs due to the liquid back at the start-up and that the refrigeration oil is diluted in the compressor. The liquid compression and the dilution of refrigeration oil cause a reduction in the reliability of the compressor.
[0003]
By the way, since the refrigerant | coolant containing chlorine, such as HCFC22, destroys ozone, the HFC type refrigerant | coolant is used as an alternative candidate refrigerant | coolant with respect to this HCFC22. Since this HFC refrigerant does not contain chlorine, the ozone depletion coefficient is zero. However, since some HFC-based refrigerants have a global warming potential (GWP) larger than that of HCFC 22, the above-described increase in the amount of refrigerant is not desirable in order to prevent global warming.
[0004]
Among the refrigerating machine oils used together with the HFC-based refrigerant, the incompatible oil does not cause clogging of capillaries or oil deterioration, and has an advantage that contamination management and moisture management are facilitated. The incompatible oil has a temperature at which the two phases separate is not in the normal temperature range and is higher than the normal temperature range. That is, incompatible oil does not separate into two phases at room temperature. However, since this incompatible oil is incompatible, two-layer separation occurs when liquid refrigerant is mixed in the compressor oil reservoir. When this two-layer separation occurs, if the specific gravity of the refrigerating machine oil is smaller than the specific gravity of the liquid refrigerant, as in the case where alkylbenzene oil is used for the R407C refrigerant, the liquid refrigerant is supplied to the sliding portion of the compressor. And poor lubrication occurs. Therefore, it is necessary to reduce the refrigerant filling amount as much as possible so that the liquid refrigerant is not supplied to the sliding portion of the compressor.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a refrigerator that can suppress the refrigerant charging amount and suppress the global warming potential.
[0006]
[Means for Solving the Problems]
To achieve the above object, the refrigerator of the invention of claim 1 is a ternary phase diagram representing the composition of HFC32, HFC125, and HFC134a, and the weight ratio of HFC32, HFC125, and HFC134a is 50: 50: 0. Among triangular regions connecting a point A, a point B where the weight ratio of HFC32, HFC125 and HFC134a is 30: 0: 70, and a point C where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 comprising a refrigerant that is a composition region R1 excluding the line segment connecting the above point a and point B represents and example Bei refrigerating machine oil being insoluble to the refrigerant,
It is characterized in that the filling amount of the filling amount ratio of the coolant for the loading of the refrigerating machine oil is 2. 0-4. Zero.
[0007]
With such a composition and weight ratio, unlike the case of using HCFC22 as a refrigerant, the ozone depletion coefficient can be made zero, and the amount of refrigerant can be reduced as compared with the case of using HCFC22. . There are two reasons why the amount of refrigerant can be reduced. The first reason is that HFC32 has a larger freezing effect than HCFC22. The second reason is that since the incompatible oil having a lower solubility than the compatible oil is used as the refrigerating machine oil, the amount of refrigerant can be reduced by the amount of the lower solubility.
[0008]
The refrigerator of the invention of claim 2 is characterized in that the weight ratio of HFC32, HFC125 and HFC134a is 70: 30: 0 on the ternary phase diagram expressing the composition of HFC32, HFC125 and HFC134a, and HFC32 And a refrigerant having a composition represented by a triangular region connecting a point where the weight ratio of HFC125 and HFC134a is 55: 0: 45 and a point where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 and e Bei refrigerating machine oil being insoluble to the refrigerant,
It is characterized in that the filling amount of the filling amount ratio of the coolant for the loading of the refrigerating machine oil is 2. 0-4. Zero.
[0009]
With such a composition and weight ratio, unlike the case where HCFC22 is used as a refrigerant, the ozone depletion coefficient can be made zero, and the refrigerant amount is reduced by 5% or more compared to the case where HCFC22 is used. be able to. Moreover, according to the refrigerant composition of the second aspect of the present invention, the global warming potential per refrigerant amount can be reduced by 30% or more compared to the case where HCFC 22 is used as the refrigerant.
[0010]
Moreover, according to the refrigerant composition of the invention of claim 2, the specific gravity of the refrigerant is 0.95 or less. If the specific gravity of the refrigerant is 0.95 or less, even if two-layer separation occurs due to liquid back or the like when an alkylbenzene oil having a specific gravity of 0.86 is used as an incompatible oil used as a refrigerating machine oil, the lower layer is a liquid refrigerant. The lower layer becomes an oil-rich layer without becoming a rich layer, or the refrigerant and the oil can be mixed by stirring. Therefore, poor lubrication can be prevented.
[0011]
According to the refrigerator of the invention of claim 3, in the refrigerator of claim 1 or 2, alkylbenzene oil incompatible with the refrigerant is provided as the refrigerator oil.
[0012]
According to the refrigerator of the invention of claim 4, in the refrigerator of claim 1 or 2, oil that is incompatible with the refrigerant and has a higher specific gravity than the refrigerant is used in the refrigerator. It is provided as machine oil. Therefore, even if two-layer separation occurs between the refrigerant and the refrigerating machine oil, since the lower layer is the refrigerating machine oil, the refrigerant is not supplied to the sliding portion of the compressor, and poor lubrication of the compressor hardly occurs.
[0013]
According to the refrigerator of the invention of claim 5, the refrigerator according to claim 4 is provided with a fluorine-based oil as the refrigerator oil.
[0014]
According to the refrigerator of the invention of claim 6, in the invention of claim 5, 6FT-STE or RFOH2 or perfluoropolyether is provided as the fluorine-based oil.
The refrigerator of the invention of claim 7 is a ternary phase diagram representing the composition of HFC32, HFC125 and HFC134a, wherein the weight ratio of HFC32, HFC125 and HFC134a is 50: 50: 0, and HFC32 And a refrigerant having a composition represented by a triangular region connecting a point where the weight ratio of HFC125, HFC125 and HFC134a is 50: 0: 50 and a point where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 and, and, e Bei refrigerating machine oil being insoluble to the refrigerant,
It is characterized in that the filling amount of the filling amount ratio of the coolant for the loading of the refrigerating machine oil is 2. 0-4. Zero.
[0015]
With such a composition and weight ratio, unlike the case of using HCFC22 as a refrigerant, the ozone depletion coefficient can be made zero, and the amount of refrigerant can be reduced as compared with the case of using HCFC22. .
[0016]
According to the refrigerant composition of the seventh aspect of the invention, the specific gravity of the refrigerant is 0.95 or less. If the specific gravity of the refrigerant can be reduced to 0.95 or less, even if two-layer separation occurs due to liquid back or the like when an alkylbenzene oil having a specific gravity of 0.86 is used as an incompatible oil used as a refrigerating machine oil, the lower layer is rich in liquid refrigerant The lower layer becomes an oil-rich layer without forming a layer, or the refrigerant and the oil can be mixed by stirring. Therefore, poor lubrication can be prevented.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to illustrated embodiments.
[0018]
[First example]
First, FIG. 1 will be described. FIG. 1 is a ternary phase diagram showing what weight percent the three types of refrigerants HFC32, HFC125, and HFC134a are mixed. That is, the length of the perpendicular line extending from a predetermined point in the triangle of FIG. 1 to each side represents the weight percentage of the refrigerant indicated at the vertex on the opposite side of the perpendicular line. Moreover, in FIG. 1, the numbers (0.9, 0.95, 1.0, 1.1, 1.2, 1.6) shown in double parentheses are used to exhibit a predetermined refrigeration capacity. This is a value obtained by normalizing the required amount of refrigerant with the amount of refrigerant required when the HCFC22 single refrigerant is used. The right-downward straight line in the triangle with the double parenthesis value satisfies the condition for realizing the double parenthesis value.
[0019]
This first example includes a three-component mixed refrigerant in which three types of refrigerants of HFC32, HFC125, and HFC134a are mixed. This three-component refrigerant mixture has a composition within a range represented by a region R1 excluding the line segment AB connecting the point A and the point B in the triangular region connecting the point A, the point B, and the point C shown in FIG. It has become. Point A indicates that the weight ratio of HFC32, HFC125, and HFC134a is 50: 50: 0. Point B represents that the weight ratio of HFC32, HFC125, and HFC134a is 30: 0: 70. Point C represents that the weight ratio of HFC32, HFC125, and HFC134a is 100: 0: 0.
[0020]
Moreover, in this 1st example, the alkylbenzene oil which is incompatible with the said refrigerant | coolant is provided as refrigerating machine oil.
[0021]
In this first example, since the HFC refrigerant is used as the refrigerant instead of HCFC 22, the ozone depletion coefficient can be made zero.
[0022]
As can be seen by referring to the region R1 in FIG. 1, the refrigerant composition and the weight ratio of the first example are in the region R1 in FIG. 1, so that the refrigerant weight can be reduced as compared with the case where the HCFC 22 is used. it can. The first reason that the amount of the refrigerant can be reduced is that the HFC 32 has a larger refrigeration effect than the HCFC 22. The second reason is that since the incompatible oil having a lower solubility than the compatible oil is used as the refrigerating machine oil, as shown in FIG. 3, the solubility is even at the same pressure (20 kgf / cm ² ). This is because the amount of refrigerant that dissolves in the refrigeration oil is reduced by a low amount.
[0023]
More specifically, for example, the point P on the left side of the triangle shown in FIG. 1 indicates that the weight ratio (HFC32, HFC125, HFC134a) is (70, 30, 0). If the refrigerant represented by this point P is used, as indicated by the numerical value 0.95 in the double parentheses <<>>, the refrigerant weight can be reduced without reducing the refrigerating capacity as compared with the case of using the HCFC22 single refrigerant. It can be reduced by 5%. However, this reduction rate is larger when the refrigerator is a room air conditioner than when the refrigerator is a packaged air conditioner, as shown in FIG. The reason for this is that the room air conditioner has a smaller (refrigerant / oil) filling ratio than the packaged air conditioner, and the incompatible property of the incompatible oil exhibits a great effect.
[0024]
As described above, according to the first example, the amount of refrigerant can be reduced as compared with the conventional case. Therefore, an increase in the amount of refrigerant can be suppressed when the piping is made longer and the chargeless operation is performed. Dilution can be prevented. Therefore, the reliability of the compressor can be prevented from being lowered and the reliability of the compression performance can be improved.
[0025]
In FIG. 1, as indicated by a point C, when the HFC single component refrigerant is used, the refrigerant weight can be reduced by 10% compared to the case where the HCFC single component refrigerant is used.
[0026]
[Second example]
The refrigerator of the second example includes a refrigerant having a composition weight ratio within the range represented by the region R2 in FIG. This region R2 is a triangular region connecting point P, point Q, and point C. As described above, the point P represents that the weight ratio (HFC32, HFC125, HFC134a) is (70, 30, 0). Point Q represents that the weight ratio (HFC32, HFC125, HFC134a) is (55, 0, 45). Point C represents that the weight ratio (HFC32, HFC125, HFC134a) is (100, 0, 0).
[0027]
Moreover, in this 2nd example, the alkylbenzene oil which is incompatible with the said refrigerant | coolant is provided as refrigerator oil.
[0028]
In this second example, since the HFC refrigerant is used as the refrigerant instead of HCFC 22, the ozone depletion coefficient can be made zero.
[0029]
Further, as can be seen by referring to the region R2 in FIG. 1, since the refrigerant composition and weight ratio of the second example are in the region R2 in FIG. 1, the amount of the refrigerant is reduced by 5% or more compared to the case where the HCFC 22 is used. can do.
[0030]
More specifically, for example, the point Q on the right side of the triangle shown in FIG. 1 indicates that the weight ratio (HFC32, HFC125, HFC134a) is (55, 0, 45). If the refrigerant represented by this point Q is used, as indicated by the numerical value 0.95 in the double parentheses <<>>, the refrigerant weight can be reduced without reducing the refrigeration capacity as compared with the case of using the HCFC22 single refrigerant. It can be reduced by 5%. As described above, according to the second example, the amount of refrigerant can be reduced as compared to the conventional case, the increase in the amount of refrigerant can be suppressed when a long pipe and chargeless operation are performed, and refrigeration by liquid compression at start-up and refrigerant stagnation. Dilution of machine oil can be prevented. Therefore, the reliability of the compressor can be prevented from being lowered and the reliability of the compression performance can be improved.
[0031]
And if the refrigerant | coolant which this point Q represents is used, a global warming coefficient can be made small compared with the case where HCFC22 single refrigerant is used. This is shown in FIG. In FIG. 2, a value obtained by dividing the value of (refrigerant weight × global warming potential) of the refrigerant of each composition shown in FIG. 2 by the value of (refrigerant weight × global warming potential) when using HCFC 22 is double brackets. It is described in <>. As can be seen from FIG. 2, when the refrigerant indicated by the above point Q is used, the value of (refrigerant weight × global warming potential) is halved compared to the case where HCFC 22 is used. Can do. That is, the global warming potential per refrigerant weight can be reduced by 50% compared to the case where HCFC 22 is used.
[0032]
In FIG. 2, a point Z represents that the weight ratio (HFC32, HFC125, HFC134a) is (60, 40, 0). If the refrigerant composition represented by the point on the line ZY connecting the point Z and the point Y is represented by <<>>, the value indicated in <<>> is 1.0 (refrigerant weight × global warming potential). ) Value is the same as when HFCF22 is used. If the refrigerant composition is represented by a point on the line QW that extends in parallel to the line ZY from the point Q and reaches the point W on the left side of the triangle, the value indicated in <<>> Is 0.5, the value of (refrigerant weight × global warming potential) is half that of when HFCF22 is used.
[0033]
In addition, as described above, the second example uses the refrigerant in the region R2 in FIG. 1, and as can be seen from FIG. 5, the specific gravity of the liquid refrigerant at 50 ° C. is 0.95 or less. (The numerical value in double parentheses <<>> described so as to be attached to the curve curved toward the lower left depicted in the triangle of FIG. 5 indicates the specific gravity of the liquid refrigerant at 50 ° C. Yes.) If the specific gravity of the liquid refrigerant is 0.95 or less, even if an alkylbenzene oil having a specific gravity of 0.86 is used as the refrigerating machine oil, when the two-layer separation occurs due to the liquid back, the lower layer is the oil-rich layer. The refrigerant and oil can be mixed by stirring. Therefore, poor lubrication of the compressor can be prevented.
[0034]
[Third example]
The refrigerator of the third example includes a refrigerant having a composition weight ratio within the range represented by the region R3 in FIG. This region R3 is a triangular region connecting point A, point E, and point C. The point A represents that the weight ratio (HFC32, HFC125, HFC134a) is (50, 50, 0) as described above. Point E represents that the weight ratio (HFC32, HFC125, HFC134a) is (50, 0, 50). Point C represents that the weight ratio (HFC32, HFC125, HFC134a) is (100, 0, 0).
[0035]
Moreover, in this 3rd example, the alkylbenzene oil which is incompatible with the said refrigerant | coolant is provided as refrigerator oil.
[0036]
In this third example, since the HFC refrigerant is used as the refrigerant instead of HCFC 22, the ozone depletion coefficient can be made zero.
[0037]
Further, as can be seen by comparing FIG. 5 and FIG. 1, the region R3 in FIG. 5 is included in the region R1 in FIG. Therefore, according to the third example, similarly to the first example, the amount of refrigerant can be reduced as compared with the case where the HCFC 22 is used.
[0038]
Further, according to the third example, the specific gravity of the refrigerant can be reduced to 0.95 or less at 50 ° C., and therefore, an alkylbenzene oil having a specific gravity of 0.86 is used as the incompatible oil used as the refrigerating machine oil. However, when two-layer separation occurs due to liquid back or the like, the lower layer becomes an oil-rich layer, or the refrigerant and oil can be mixed by stirring. Therefore, poor lubrication can be prevented.
[0039]
In the first, second, and third examples, the alkylbenzene oil is provided as the refrigerating machine oil. However, a fluorine-based oil having a specific gravity greater than that of the refrigerant used may be provided instead of the alkylbenzene oil. As a specific example of the fluorine-based oil, as shown in FIG. 6, demnum (registered trademark, perfluoropolyether), 6FT-STE, or RFOH2 may be used. The above 6FT-STE is 1,1,1,2-tetrafluoro-3- (1 ', 2', 2 ', 2'-tetrafluoro-1'-trifluoromethylethyl) -2-trifluoromethyl -4-trifluoromethyl-5-oxa-3-tricosene and 1,1,1,2,2,3,3-heptafluoro-5- (1 ', 2', 2 ', 2'-tetrafluoro -1'-trifluoromethylethyl) -4-trifluoromethyl-6-oxa-4-tetracosene. The above-mentioned R F OH2 is 1,4-dichloromethyl-9,9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,17, 17,18,18,18-Heptadecafluoro-3,6-dioxa-1-octadecanol. Further, specific examples of the fluorine-based oil include 1,1,1,2-tetrafluoro-3- (1 ', 2', 2 ', 2'-), which is one compound constituting the above 6FT-STE. There is tetrafluoro-1'-trifluoromethylethyl) -2-trifluoromethyl-4-trifluoromethyl-5-oxa-3-tricosene.
[0040]
【The invention's effect】
As is clear from the above, the refrigerator of the invention of claim 1 is a ternary phase diagram representing the composition of HFC32, HFC125 and HFC134a, and the weight ratio of HFC32, HFC125 and HFC134a is 50: 50: 0. Among triangular regions connecting a point A, a point B where the weight ratio of HFC32, HFC125 and HFC134a is 30: 0: 70, and a point C where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 comprising a refrigerant that is a composition region R1 excluding the line segment connecting the above point a and point B represents and Bei give a refrigerating machine oil which is incompatible with the refrigerant, filling the refrigerant oil the filling amount of the filling amount ratio of the coolant to the amount was set to 2. 0-4. zero.
[0041]
With such a composition and weight ratio, unlike the case of using HCFC22 as a refrigerant, the ozone depletion coefficient can be made zero, and the amount of refrigerant can be reduced as compared with the case of using HCFC22. . There are two reasons why the amount of refrigerant can be reduced. The first reason is that HFC32 has a larger freezing effect than HCFC22. The second reason is that since the incompatible oil having a lower solubility than the compatible oil is used as the refrigerating machine oil, the amount of refrigerant can be reduced by the amount of the lower solubility.
[0042]
The refrigerator of the invention of claim 2 is characterized in that the weight ratio of HFC32, HFC125 and HFC134a is 70: 30: 0 on the ternary phase diagram expressing the composition of HFC32, HFC125 and HFC134a, and HFC32 And a refrigerant having a composition represented by a triangular region connecting a point where the weight ratio of HFC125 and HFC134a is 55: 0: 45 and a point where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 and, and, e Bei refrigerating machine oil being insoluble to the refrigerant, and the filling amount of the filling amount ratio of the coolant for the loading of the refrigerating machine oil is 2. 0-4. zero.
[0043]
With such a composition and weight ratio, unlike the case where HCFC22 is used as a refrigerant, the ozone depletion coefficient can be made zero, and the refrigerant amount is reduced by 5% or more compared to the case where HCFC22 is used. be able to. Moreover, according to the refrigerant composition of the second aspect of the present invention, the global warming potential per refrigerant amount can be reduced by 30% or more compared to the case where HCFC 22 is used as the refrigerant.
[0044]
Moreover, according to the refrigerant composition of the invention of claim 2, the specific gravity of the refrigerant is 0.95 or less. If the specific gravity of the refrigerant is 0.95 or less, even if two-layer separation occurs due to liquid back or the like when an alkylbenzene oil having a specific gravity of 0.86 is used as an incompatible oil used as a refrigerating machine oil, the lower layer is a liquid refrigerant. The lower layer becomes an oil-rich layer without becoming a rich layer, or the refrigerant and the oil can be mixed by stirring. Therefore, poor lubrication can be prevented.
[0045]
According to the refrigerator of the invention of claim 3, in the refrigerator of claim 1 or 2, alkylbenzene oil incompatible with the refrigerant is provided as the refrigerator oil.
[0046]
According to the refrigerator of the invention of claim 4, in the refrigerator of claim 1 or 2, oil that is incompatible with the refrigerant and has a higher specific gravity than the refrigerant is used in the refrigerator. It is provided as machine oil.
[0047]
Therefore, even if two-layer separation occurs between the refrigerant and the refrigerating machine oil, the lower layer is the refrigerating machine oil, so that poor lubrication of the compressor hardly occurs.
[0048]
According to the refrigerator of the invention of claim 5, the refrigerator according to claim 4 is provided with a fluorine-based oil as the refrigerator oil.
[0049]
According to the refrigerator of the invention of claim 6, in the invention of claim 5, 6FT-STE or RFOH2 or demnum is provided as the fluorine-based oil.
The refrigerator of the invention of claim 7 is a ternary phase diagram representing the composition of HFC32, HFC125 and HFC134a, wherein the weight ratio of HFC32, HFC125 and HFC134a is 50: 50: 0, and HFC32 And a refrigerant having a composition represented by a triangular region connecting a point where the weight ratio of HFC125, HFC125 and HFC134a is 50: 0: 50 and a point where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 and, and, e Bei refrigerating machine oil being insoluble to the refrigerant, and the filling amount of the filling amount ratio of the coolant for the loading of the refrigerating machine oil is 2. 0-4. zero.
[0050]
With such a composition and weight ratio, unlike the case of using HCFC22 as a refrigerant, the ozone depletion coefficient can be made zero, and the amount of refrigerant can be reduced as compared with the case of using HCFC22. .
[0051]
According to the refrigerant composition of the seventh aspect of the invention, the specific gravity of the refrigerant is 0.95 or less. If the specific gravity of the refrigerant can be reduced to 0.95 or less, even if two-layer separation occurs due to liquid back or the like when an alkylbenzene oil having a specific gravity of 0.86 is used as an incompatible oil used as a refrigerating machine oil, the lower layer is rich in liquid refrigerant The lower layer becomes an oil-rich layer without forming a layer, or the refrigerant and the oil can be mixed by stirring. Therefore, poor lubrication can be prevented.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a ternary phase diagram for explaining a reduction in refrigerant amount according to an embodiment of a refrigerator of the present invention.
FIG. 2 is a ternary phase diagram for explaining a reduction in (refrigerant amount × global warming potential) according to the embodiment.
FIG. 3 is a characteristic diagram comparing the solubility of a compatible oil and an incompatible oil.
FIG. 4 is a characteristic diagram for explaining a reduction rate of the refrigerant amount due to incompatible oil.
FIG. 5 is a ternary phase diagram illustrating a liquid refrigerant specific gravity distribution according to the embodiment.
FIG. 6 is a list showing specific gravity of each incompatible oil as refrigerating machine oil.
[Explanation of symbols]
R1, R2, R3... Region.

Claims (7)

On the ternary phase diagram representing the composition of HFC32, HFC125, and HFC134a, the weight ratio of HFC32, HFC125, and HFC134a is 50: 50: 0, and the weight ratio of HFC32, HFC125, and HFC134a is 30: 0. : A region R1 excluding a line segment connecting the point A and the point B in a triangular region connecting the point B which is 70 and the point C where the weight ratio of HFC32, HFC125 and HFC134a is 100: 0: 0 comprising a refrigerant that is a composition represented, and, e Bei refrigerating machine oil being insoluble to the refrigerant,
The filling amount of the filling amount ratio of the coolant for the loading of the refrigeration machine oil 2.0 to 4. 0, and refrigerator, characterized in that the. On the ternary phase diagram representing the composition of HFC32, HFC125, and HFC134a, the weight ratio of HFC32, HFC125, and HFC134a is 70: 30: 0, and the weight ratio of HFC32, HFC125, and HFC134a is 55: 0: 45 and a refrigerant having a composition represented by a triangular region connecting a point where the weight ratio of HFC32, HFC125, and HFC134a is 100: 0: 0, and is incompatible with the refrigerant. for example Bei certain refrigerating machine oil,
The filling amount of the filling amount ratio of the coolant for the loading of the refrigeration machine oil 2.0 to 4. 0, and refrigerator, characterized in that the. The refrigerator according to claim 1 or 2,
A refrigerating machine comprising an alkylbenzene oil incompatible with the refrigerant as the refrigerating machine oil. The refrigerator according to claim 1 or 2,
A refrigerating machine comprising an oil that is incompatible with the refrigerant and has a higher specific gravity than the refrigerant as the refrigerating machine oil. The refrigerator according to claim 4,
A refrigerator comprising a fluorine-based oil as the refrigerator oil. The refrigerator according to claim 5,
A refrigerator comprising 6FT-STE, RFOH2, or perfluoropolyether as the fluorine-based oil. On the ternary phase diagram representing the composition of HFC32, HFC125, and HFC134a, the weight ratio of HFC32, HFC125, and HFC134a is 50: 50: 0, and the weight ratio of HFC32, HFC125, and HFC134a is 50: 0: 50, and a refrigerant having a composition represented by a triangular region connecting a point where the weight ratio of HFC32, HFC125, and HFC134a is 100: 0: 0, and is out of phase with the refrigerant. for example Bei refrigerating machine oil is soluble,
The filling amount of the filling amount ratio of the coolant for the loading of the refrigeration machine oil 2.0 to 4. 0, and refrigerator, characterized in that the.

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