CS240455B1 - The method of vacuuming the cooling agents before filling them with refrigerant - Google Patents

The method of vacuuming the cooling agents before filling them with refrigerant Download PDF

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CS240455B1
CS240455B1 CS842854A CS285484A CS240455B1 CS 240455 B1 CS240455 B1 CS 240455B1 CS 842854 A CS842854 A CS 842854A CS 285484 A CS285484 A CS 285484A CS 240455 B1 CS240455 B1 CS 240455B1
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Czechoslovakia
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vacuuming
phase
refrigerant
partial
vapors
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CS842854A
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Czech (cs)
Slovak (sk)
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CS285484A1 (en
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Viliam Ferech
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Viliam Ferech
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Priority to CS842854A priority Critical patent/CS240455B1/en
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Publication of CS240455B1 publication Critical patent/CS240455B1/en

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Abstract

Spůsob vákuovania chladiacich agřegátov před ich plněním chladivom, u ktorého sa v prvej fáze vykonává odstránenie ochranného plynu vákuovaním, v druhej fáze preplach agregátu parami chladivá a v tretej fáze vákuovanie zmesi pár chladivá a ochranného plynu. Riešeným problémom je . najma zníženie časovej a tým aj energetickej náročnosti vákuovania. To sa dosahuje tým, že v druhej fáze sa vykonává len čiastočný preplach agregátu parami chladivá, po ktorom následuje čiastočné vákuovanie s dalším čiastočným preplachom parami chladivá v tretej fáze opáť čiastočné vákuovanie zmesi pár chladivá a zostávajúcich pár ochranného plynu.Method of vacuuming cooling units before filling them with refrigerant, in which in the first phase the protective gas is removed by vacuuming, in the second phase the unit is purged with refrigerant vapors and in the third phase the mixture of refrigerant vapors and protective gas is vacuumed. The problem to be solved is . in particular the reduction of the time and thus the energy requirements of vacuuming. This is achieved by only partially purging the unit with refrigerant vapors in the second phase, followed by partial vacuuming with another partial purge with refrigerant vapors, in the third phase again partial vacuuming of the mixture of refrigerant vapors and the remaining protective gas vapors.

Description

Vynález sa týká spósobu vákuovania chladiacich agregátov před ich plněním chladivom, u ktorého sa v prvej fáze vykonává odstránenie ochranného plynu vákuovaním, v druhej fáze preplach agregátu parami chladivá a v tretej fáze vákuovanie zmesi pás chládiva a ochranného plynu.The invention relates to a method of evacuating cooling units before filling them with refrigerant, in which the first phase involves removing the protective gas by vacuuming, in the second phase the unit is flushed with refrigerant vapor, and in the third phase the mixture of refrigerant and protective gas is evacuated.

Podta známého stavu techniky sa v prvej fáze vykonává technologicky úplné vákuovanie, t. j. vákuovania na cca 130 Pa, v druhej fáze úplný preplach, t. j. na cca 10 000 Pa a v tretej fáze technologicky úplné vákuovanie opat na cca 130 Pa. Nevýhodou tohoto spósobu je, že si vyžaduje značný celkový technologický čas, pretože čas potřebný na technologicky úplné vákuovanie agregátu sa s klesajúcou hodnotou vákua podstatné predížuje.According to the known state of the art, in the first phase, technologically complete vacuuming is performed, i.e. vacuuming to approx. 130 Pa, in the second phase, complete flushing, i.e. to approx. 10,000 Pa, and in the third phase, technologically complete vacuuming again to approx. 130 Pa. The disadvantage of this method is that it requires a significant total technological time, because the time required for technologically complete vacuuming of the aggregate increases significantly with decreasing vacuum value.

Uvedené nevýhody odstraňuje spósob vákuovania chladiacich agregátov před leh plněním chladivom podta vynálezu, ktorého podstata spočívá v tom, že v druhej fáze sa vykonává len čiastočný preplach agregátu parami chladivá, po ktorom následuje čiasťočné vákuovanie s dalším čiastočným preplachom parami chladivá a v tretej fáze opat čiastočné vákuovanie zmesi pás chladivá a zostáva júcich pár ochranného plynu.The above disadvantages are eliminated by the method of vacuuming cooling units before filling with refrigerant according to the invention, the essence of which is that in the second phase only partial flushing of the unit with refrigerant vapor is performed, followed by partial vacuuming with another partial flushing with refrigerant vapor, and in the third phase again partial vacuuming of the mixture of refrigerant vapor and remaining protective gas vapor.

Výhodou spósobu podta vynálezu je, že umožňuje podstatné skrátit celý technologický čas a tým aj energetickú náročnost vákuovania. Pri vhodné volených parametroch vákuovania možno znížiť aj zostatkoivú hodnotu parciálneho tlaku ochranného plynu v agregáte na konci vákuovacieho procesu.The advantage of the method according to the invention is that it allows to significantly shorten the entire technological time and thus the energy consumption of the vacuuming. With suitably selected vacuuming parameters, it is also possible to reduce the residual value of the partial pressure of the protective gas in the unit at the end of the vacuuming process.

Spósob podfa vynálezu možno aplikovať například u chladiacich agregátov pre domáce chladničky, kde sa ako ochranný plyn používá dusík a ako chladivo freon 12.The method according to the invention can be applied, for example, to cooling units for domestic refrigerators, where nitrogen is used as the protective gas and Freon 12 is used as the refrigerant.

U spósobu podfa vynálezu sa v prvej fáze, obdobné ako u známého spósobu vykonává odstránenie ochranného plynu technologicky úplným vákuovaním na hodnotu 130 Pa. V druhej fáze sa na rozdiel od známého stavu vykonává iba čiastočný preplach na hodnotu 5 000 Pa, po ktorom následuje čiastočne vákuovanie na hodnotu 500 Pa. Potom následuje opát čiastočný preplach na hodnotu 5 000 Pa. V tretej fáze následuje namiesto technologicky úplného vákuovania iba čiastočné vákuovanie na hodnotu 500 Pa.In the method according to the invention, in the first phase, similar to the known method, the protective gas is removed by technologically complete vacuuming to a value of 130 Pa. In the second phase, in contrast to the known state, only a partial purge to a value of 5,000 Pa is performed, followed by partial vacuuming to a value of 500 Pa. Then a partial purge to a value of 5,000 Pa follows again. In the third phase, instead of technologically complete vacuuming, only a partial vacuuming to a value of 500 Pa follows.

Porovnanie tlakových parametrov a časovej náročnosti známého spósobu a spósobu podfa vynálezu v jednotlivých fázach technologie vákuovania.Comparison of pressure parameters and time requirements of the known method and the method according to the invention in individual phases of the vacuum technology.

Fáza Phase Známy spósob A familiar way Cas v min. Time in minutes Spósob podfa vynálezu Method according to the invention pare. tlak Pa steam pressure Pa Celk. tlak Pa Total pressure Pa pare. tlak Pa steam pressure Pa Cas v min. Time in minutes ochr. plynu gas protection chladivá refrigerants ochr. plynu gas protection chladivá refrigerants Celk. tlak Pa Total pressure Pa I. I. 130 130 0 0 130 130 1,5 1.5 130 130 0 0 130 130 1,5 1.5 130 130 4 870 4,870 5 000 5,000 1,0 1.0 II. II. 130 130 9 870 10 000 9,870 10,000 1,2 1.2 13 13 487 487 500 500 1,7 1.7 13 13 4 987 4,987 5 000 5,000 1,0 1.0 III. III. 1,69 128,3 1.69 128.3 130 130 12,5 12.5 1,3 1.3 498,7 498.7 500 500 1,7 1.7

Spolu 14,2 6,9Total 14.2 6.9

Z uvedeného porovnania vyplývá značná úspora technologického času na vákuovanie jedného agregátu u spósobu podfa vynálezu, v danom případe 7,3 minút. Přitom sa dosiahne aj menší parciálny tlak ochranného plynu na konci vákuovacieho procesu, namiesto 1,69 Pa iba 1,3 Pa. Vačší zostatůk chladivá v agregáte pri parciálnom tlaku 498,7 Pa představuje aj určité východiskové množstvo chladivá pri plnění. Tým je daný aj předpoklad vyššej hospodárnosti plnenia.The above comparison shows a significant saving in technological time for evacuating one unit using the method according to the invention, in this case 7.3 minutes. In this case, a lower partial pressure of the protective gas is also achieved at the end of the evacuating process, instead of 1.69 Pa only 1.3 Pa. The larger residual refrigerant in the unit at a partial pressure of 498.7 Pa also represents a certain starting amount of refrigerant during filling. This also provides a prerequisite for higher filling efficiency.

Claims (1)

PREDMET Spósob vákuovania chladiacich agregátov před ich plněním chladivom, u ktorého sa v prvej fáze vykonává Odstránenie ochranného plynu vákuovaním, v druhej fáze preplach agregátu parami chladivá a v tretej fáze vákuovanie zmesi pár chladivá a ochranného plynu, vyznačujúci sa tým, VYNÁLEZU že v druhej fáze sa vykonává len čiastočný preplach agregátu parami chladivá, po ktorom následuje čiastočné vákuovanie s dalším čiastočným preplachom parami chladivá a v tretej fáze opat čiastočné vákuovanie zmesi pár chladivá a zostávajúcich pár ochranného plynu.SUBJECT A method of vacuuming refrigeration units prior to filling them with a refrigerant in which the shielding gas is removed in a first phase by vacuuming, in a second phase rinsing the aggregate with refrigerant vapors and in a third phase vacuuming the refrigerant / shielding gas mixture, characterized in that in the second stage only a partial flushing of the aggregate is carried out by the coolant vapors, followed by partial vacuuming with a further partial flushing of the coolant vapors, and in the third phase a partial vacuuming of the coolant vapor mixture and the remaining protective gas vapor.
CS842854A 1984-04-16 1984-04-16 The method of vacuuming the cooling agents before filling them with refrigerant CS240455B1 (en)

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CS842854A CS240455B1 (en) 1984-04-16 1984-04-16 The method of vacuuming the cooling agents before filling them with refrigerant

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CS842854A CS240455B1 (en) 1984-04-16 1984-04-16 The method of vacuuming the cooling agents before filling them with refrigerant

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CS240455B1 true CS240455B1 (en) 1986-02-13

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