REFRIGERATION DEVICE
PROBLEM TO BE SOLVED: To solve problems in reduction of usage of chlorofluorocarbon in a refrigeration device that a proper refrigerant in place of chlorofluorocarbon has not been provided, remarkable usage of carbon dioxide requires high pressure of 5.0-7.0 MPa in condensing carbon dioxide under a...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
10.08.2017
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To solve problems in reduction of usage of chlorofluorocarbon in a refrigeration device that a proper refrigerant in place of chlorofluorocarbon has not been provided, remarkable usage of carbon dioxide requires high pressure of 5.0-7.0 MPa in condensing carbon dioxide under a normal temperature, a general-purpose refrigerating machine is intolerable to the usage, and heat source necessary for cooling is hardly secured for the sake of a mechanism of a refrigeration cycle.SOLUTION: In a refrigeration device in which condensing heat source of a mixed refrigerant introduced to an evaporator is a return refrigerant of low temperature passing through a cascade, the mixed refrigerant is prepared by mixing carbon dioxide and natural refrigerant (propane) condensed and liquefied in a normal temperature region or a fluorocarbon refrigerant, and the fluorocarbon refrigerant is hydrofluorocarbon (HFC).SELECTED DRAWING: Figure 1
【課題】 冷凍装置にあって、フロンの使用量の削減するについて、それに代わる良好な冷媒の提供がなく、注目される二酸化炭素の使用は、二酸化炭素を常温凝縮しようとすると、5.0〜7.0MPaの高圧が必要となり、汎用の冷凍機では使用に耐えられず、冷却するにしてもその必要な熱源の確保は、冷凍サイクルの機構上困難であったという点である。【解決手段】 蒸発器へ導入される混合冷媒の凝縮熱源をカスケードを通過する低温の戻り冷媒によって行う冷凍装置であって、前記した混合冷媒が二酸化炭素と、常温域で凝縮液化する自然冷媒(プロパン)あるいはフロン系冷媒を混合したものであることとし、前記したフロン系冷媒はハイドロフルオロカーボン(HFC)であることとする。【選択図】 図1 |
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Bibliography: | Application Number: JP20160018682 |