JP3575090B2 - Adjusting composition change during non-azeotropic refrigerant mixture transfer and filling - Google Patents
Adjusting composition change during non-azeotropic refrigerant mixture transfer and filling Download PDFInfo
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- JP3575090B2 JP3575090B2 JP30771994A JP30771994A JP3575090B2 JP 3575090 B2 JP3575090 B2 JP 3575090B2 JP 30771994 A JP30771994 A JP 30771994A JP 30771994 A JP30771994 A JP 30771994A JP 3575090 B2 JP3575090 B2 JP 3575090B2
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- Prior art keywords
- refrigerant
- filling
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- composition
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Description
【０００１】
【産業上の利用分野】
本発明は非共沸冷媒混合液を移充填する際の組成変化を一定範囲内に調整する方法に関するものである。
【０００２】
【従来の技術】
近年、クロロフルオロカーボンの影響によるオゾン層破壊の環境問題のために、１９９５年末までのクロロフルオロカーボン全廃が決定している。また、オゾン層破壊に対する影響の少ないハイドロクロロフルオロカーボンについても、いずれ全廃する方向にある。そこで、これらクロロフルオロカーボンまたはハイドロクロロフルオロカーボンの代替冷媒としては、単一成分の冷媒や共沸系冷媒での代替が困難であるため、非共沸混合冷媒の採用が有力となっている。
【０００３】
今日までに使用されてきた、単一成分もしくは共沸系冷媒については、組成の変動はないため、移充填の際、気相充填もしくは液相充填ともに特に組成変化を調整する技術は必要なかった。
【０００４】
【発明が解決しようとする課題】
非共沸混合冷媒の充填の場合も単一成分と同様の充填方法が考えられるが、その際沸点が低い成分が選択的に気相側に蒸発するため、気相充填方法では正確な液組成の充填が不可能である。一方、液相充填法でも、移充填に伴いボンベなどの冷媒容器内の気相の体積が増加することで低沸点成分が選択的に気相側に気化するため、結果として液組成が変化してしまうという問題がある。このため、空調機中の冷媒容器への冷媒充填に際して、一台一台の冷媒組成が変化し、全ての空調機に同一の冷凍能力を発揮させることが困難となる。また、この組成変化のためボンベ内の冷媒を全て使いきることができず不経済である。
【０００５】
【課題を解決するための手段】
本発明は、上記問題に鑑み、非共沸冷媒混合液を移充填する際の組成変化を調整する方法を提供することを目的とする。
【０００６】
すなわち、本発明は、第１の冷媒容器に充填されたジフルオロメタン（Ｒ３２）、１，１，１，２，２−ペンタフルオロエタン（Ｒ１２５）および１，１，１，２−テトラフルオロエタン（Ｒ１３４ａ）からなる非共沸冷媒混合液を２以上の第２の冷媒容器へ分けて移充填するに際して、１回目の移充填に先立って第１の冷媒容器に充填された前記混合液中のＲ３２およびＲ１２５の混合液組成をＲ３２＝２３． ４〜２４． ０ｗｔ％およびＲ１２５＝２５． ２〜２６． ０ｗｔ％とすることにより、移充された第２の冷媒容器中の混合液組成をＲ３２／Ｒ１２５／Ｒ１３４ａ＝２３±１／２５±２／５２±２ｗｔ％の範囲となるように調整することを特徴とする非共沸冷媒混合液移充填時の組成変化調整方法である。
【０００７】
Ｒ３２／Ｒ１２５／Ｒ１３４ａ＝２３／２５／５２ｗｔ％からなる非共沸混合冷媒はクロロジフルオロメタンの代替冷媒として注目されている。空調機などの特性を維持するために、この非共沸冷媒混合液は空調機中の冷媒容器においてＲ３２／Ｒ１２５／Ｒ１３４ａ＝２３±１／２５±２／５２±２ｗｔ％となるように維持管理する必要がある。
【０００８】
上記非共沸冷媒混合液は、ボンベなどの第１の冷媒容器から２以上の第２の冷媒容器、例えばサービス缶などへ移充填したり、ボンベやサービス缶などの第１の冷媒容器から２以上の第２の冷媒容器、例えば空調機中の冷媒容器へ移充填することがある。この場合、ボンベやサービス缶中の非共沸冷媒混合液は一回の操作で使い切るのではなく、移充填を複数回行うことにより使い切ることが通常である。
【０００９】
一回の操作でないと、非共沸冷媒混合液の組成が変動するという前述の問題が生じる。本発明の方法は、１回目の移充填に先立って、ボンベやサービス缶などの第１の冷媒容器に充填された前記非共沸冷媒混合液中のＲ３２およびＲ１２５の混合液組成をＲ３２＝２３．４〜２４．０ｗｔ％およびＲ１２５＝２５．２〜２６．０ｗｔ％とすることにより移充された第２の冷媒容器中の混合液組成をＲ３２／Ｒ１２５／Ｒ１３４ａ＝２３±１／２５±２／５２±２ｗｔ％の範囲となるように調整することができ、複数回の移充填に伴う組成変動を調整できる。
【００１０】
本発明の方法は、冷媒メーカーにおいてひとつのボンベから２以上の他のボンベやサービス缶へ移充填する場合、空調機メーカーにおいてひとつのボンベから２以上の空調機への冷媒充填時、または修理、漏洩時にひとつのサービス缶から２以上の空調機への冷媒充填時などにおいて好適に利用できる。
【００１１】
【実施例】
以下例１〜２は実施例、例３は比較例である。
【００１２】
「例１」
Ｒ３２／Ｒ１２５／Ｒ１３４ａ＝２３． ４／２６． ０／５０．６（ｗｔ％）の組成の冷媒を１０リットルの元ボンベに９リットル充填し、この元ボンベから液相充填法により１リットルの子ボンベに０．９リットルずつ移充填を行った。
【００１３】
移充填をした子ボンベの液組成を分析したところいずれもＲ３２、Ｒ１２５およびＲ１３４ａの組成が２３±１、２５±２、５２±２ｗｔ％の範囲内であった。
【００１４】
「例２」
Ｒ３２／Ｒ１２５／Ｒ１３４ａ＝２４． ０／２５． ２／５０．８（ｗｔ％）の組成の冷媒を１０リットルの元ボンベに９リットル充填し、この元ボンベから液相充填法により１リットルの子ボンベに０．９リットルずつ移充填を行った。
【００１５】
移充填をした子ボンベの液組成を分析したところいずれもＲ３２、Ｒ１２５およびＲ１３４ａの組成が２３±１、２５±２、５２±２ｗｔ％の範囲内であった。
【００１６】
「例３」
Ｒ３２／Ｒ１２５／Ｒ１３４ａ＝２３／２５／５２（ｗｔ％）の組成の冷媒を１０リットルの元ボンベに９リットル充填し、この元ボンベから液相充填法により１リットルの子ボンベに０．９リットルずつ移充填を行った。
【００１７】
移充填をした子ボンベの液組成を分析したところ、９番目および最後に充填した子ボンベ中のＲ３２、Ｒ１２５およびＲ１３４ａの組成が２３±１、２５±２、５２±２ｗｔ％の範囲内ではなかった。
【００１８】
【発明の効果】
本発明によれば、非共沸混合冷媒を移充填する際、組成変化を調整できる。この方法は、冷媒メーカーでのボンベ充填、空調機メーカーでの空調機への冷媒充填、修理、漏洩時にサービス缶から空調機への充填などの分野で利用できる。[0001]
[Industrial applications]
The present invention relates to a method for adjusting a composition change within a certain range when a non-azeotropic refrigerant mixture is transferred and filled.
[0002]
[Prior art]
In recent years, due to the environmental problem of depletion of the ozone layer due to the influence of chlorofluorocarbon, it has been decided to completely abolish chlorofluorocarbon by the end of 1995. Also, hydrochlorofluorocarbons that have little effect on ozone layer destruction will eventually be totally abolished. Thus, as a substitute for these chlorofluorocarbons or hydrochlorofluorocarbons, it is difficult to substitute a single-component refrigerant or an azeotropic refrigerant, and thus the use of a non-azeotropic mixed refrigerant has become effective.
[0003]
For single-component or azeotropic refrigerants used to date, there is no change in the composition, so there is no need for a technique for adjusting the composition change in both gas-phase and liquid-phase filling during transfer and filling. .
[0004]
[Problems to be solved by the invention]
In the case of charging a non-azeotropic mixed refrigerant, the same charging method as for a single component is conceivable, but in that case, components having a low boiling point selectively evaporate to the gas phase side. Is not possible. On the other hand, even in the liquid-phase filling method, the low-boiling-point components are selectively vaporized to the gas-phase side due to an increase in the volume of the gas phase in a refrigerant container such as a cylinder due to transfer and filling, and as a result, the liquid composition changes. Problem. For this reason, at the time of charging the refrigerant into the refrigerant container in the air conditioner, the composition of the refrigerant changes one by one, and it becomes difficult for all the air conditioners to exhibit the same refrigeration capacity. In addition, due to this change in composition, the refrigerant in the cylinder cannot be completely used, which is uneconomical.
[0005]
[Means for Solving the Problems]
In view of the above problems, an object of the present invention is to provide a method for adjusting a composition change when a non-azeotropic refrigerant mixture is transferred and filled.
[0006]
That is, the present invention provides difluoromethane (R32), 1,1,1,2,2-pentafluoroethane (R125), and 1,1,1,2-tetrafluoroethane (R125) filled in the first refrigerant container. When the non-azeotropic refrigerant mixture comprising R134a) is divided into two or more second refrigerant containers for transfer and filling, R32 in the mixed liquid filled in the first refrigerant container prior to the first transfer and filling is used. And the mixture composition of R125 and R32 = 23. 4 to 24. 0 wt% and R125 = 25. 2-26. By adjusting to 0 wt%, the mixed liquid composition in the transferred second refrigerant container is adjusted so that R32 / R125 / R134a = 23 ± 1/25 ± 2/52 ± 2 wt%. This is a method of adjusting a composition change at the time of transferring and filling a non-azeotropic refrigerant mixture liquid.
[0007]
A non-azeotropic refrigerant mixture consisting of R32 / R125 / R134a = 23/25/52 wt% is drawing attention as an alternative refrigerant to chlorodifluoromethane. In order to maintain the characteristics of the air conditioner, etc., this non-azeotropic refrigerant mixture is maintained and controlled so that R32 / R125 / R134a = 23 ± 1/25 ± 2/52 ± 2 wt% in the refrigerant container in the air conditioner. There is a need to.
[0008]
The non-azeotropic refrigerant mixture is transferred from a first refrigerant container such as a cylinder to two or more second refrigerant containers, for example, a service can or the like, or transferred from a first refrigerant container such as a cylinder or a service can. The above-mentioned second refrigerant container, for example, the refrigerant container in an air conditioner may be refilled. In this case, the non-azeotropic refrigerant mixture in the cylinder or the service can is generally used up by performing transfer and filling a plurality of times, instead of being used up by one operation.
[0009]
If the operation is not performed once, the above-described problem that the composition of the non-azeotropic refrigerant mixed liquid fluctuates occurs. Prior to the first transfer and refilling, the method of the present invention is characterized in that the mixed liquid composition of R32 and R125 in the non-azeotropic refrigerant mixed liquid filled in the first refrigerant container such as a cylinder or a service can is R32 = 23. 0.4 to 24.0 wt% and R125 = 25.2 to 26.0 wt% , the mixed liquid composition in the second refrigerant container filled with R32 / R125 / R134a = 23 ± 1/25 ± 2. / 52 ± 2 wt% can be adjusted, and composition fluctuations caused by multiple refills can be adjusted.
[0010]
The method of the present invention can be used when the refrigerant maker transfers and refills from one cylinder to two or more other cylinders or service cans. It can be suitably used at the time of leakage, for example, at the time of charging a refrigerant from one service can to two or more air conditioners.
[0011]
【Example】
Hereinafter, Examples 1 and 2 are Examples, and Example 3 is a Comparative Example.
[0012]
"Example 1"
R32 / R125 / R134a = 23. 4/26. 9 liters of a refrigerant having a composition of 0 / 50.6 (wt%) was charged into a 10-liter original cylinder, and 0.9 liters were transferred and filled from this original cylinder into a 1-liter child cylinder by a liquid phase filling method. .
[0013]
When the liquid composition of the transferred and filled child cylinder was analyzed, the compositions of R32, R125 and R134a were all within the range of 23 ± 1, 25 ± 2, and 52 ± 2 wt%.
[0014]
"Example 2"
R32 / R125 / R134a = 24. 0/25. 9 liters of a refrigerant having a composition of 2 / 50.8 (wt%) was charged into a 10-liter original cylinder, and 0.9 liters were transferred and filled from this original cylinder into a 1-liter child cylinder by a liquid phase filling method. .
[0015]
When the liquid composition of the transferred and filled child cylinder was analyzed, the compositions of R32, R125 and R134a were all within the range of 23 ± 1, 25 ± 2, and 52 ± 2 wt%.
[0016]
"Example 3"
9 liters of a refrigerant having a composition of R32 / R125 / R134a = 23/25/52 (wt%) are filled in a 10-liter main cylinder, and 0.9 liter is filled from the former cylinder into a 1-liter child cylinder by a liquid phase filling method. Transfer filling was performed at a time.
[0017]
When the liquid composition of the transferred and filled child cylinder was analyzed, the compositions of R32, R125 and R134a in the ninth and last filled child cylinders were not within the range of 23 ± 1, 25 ± 2, 52 ± 2 wt%. Was.
[0018]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, when transfilling a non-azeotropic mixed refrigerant, composition change can be adjusted. This method can be used in fields such as filling a cylinder by a refrigerant manufacturer, filling a refrigerant into an air conditioner by an air conditioner manufacturer, repairing, and filling a service can into an air conditioner in case of leakage.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30771994A JP3575090B2 (en) | 1994-12-12 | 1994-12-12 | Adjusting composition change during non-azeotropic refrigerant mixture transfer and filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30771994A JP3575090B2 (en) | 1994-12-12 | 1994-12-12 | Adjusting composition change during non-azeotropic refrigerant mixture transfer and filling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08157810A JPH08157810A (en) | 1996-06-18 |
| JP3575090B2 true JP3575090B2 (en) | 2004-10-06 |
Family
ID=17972429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30771994A Expired - Fee Related JP3575090B2 (en) | 1994-12-12 | 1994-12-12 | Adjusting composition change during non-azeotropic refrigerant mixture transfer and filling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3575090B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10160296A (en) * | 1996-11-28 | 1998-06-19 | Daikin Ind Ltd | Method for filling mixed refrigerant |
| JPH10197108A (en) * | 1997-01-13 | 1998-07-31 | Daikin Ind Ltd | Mixed refrigerant charging method |
| CN1216118C (en) | 2003-05-07 | 2005-08-24 | 浙江蓝天环保高科技股份有限公司 | Environmental protection type refrigerant for substituting HCFC-22 |
| DK2894209T3 (en) * | 2012-09-04 | 2022-02-21 | Daikin Ind Ltd | PROCEDURE FOR FILLING MIXED COOLANT CONTAINING THE 2,3,3,3-TETRAFLUORPROPENE |
| JP6315071B1 (en) * | 2016-11-28 | 2018-04-25 | ダイキン工業株式会社 | Method for transferring and filling refrigerant composition |
| JP6841066B2 (en) * | 2017-02-03 | 2021-03-10 | ダイキン工業株式会社 | A method of using a mixture of fluorinated hydrocarbons as a refrigerant, and a refrigerating device using the mixture as a refrigerant. |
-
1994
- 1994-12-12 JP JP30771994A patent/JP3575090B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08157810A (en) | 1996-06-18 |
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