Refrigeration system

Abstract

A refrigeration system includes a first refrigerant passage, a π-type silencer, and a second refrigerant passage. The π-type silencer has a first silencing space, a second silencing space, and a communication path. The first silencing space communicates with the first refrigerant passage. The second silencing space is disposed below the first silencing space. The communication path extends from the lower end of the first silencing space to the outside of the first silencing space and communicates with the second silencing space. The second refrigerant passage extends from the lower end of the second silencing space.

Description

TECHNICAL FIELD[0001]The present invention relates to a refrigeration system and particularly to a refrigeration system in which a π-type silencer is employed as a silencer.BACKGROUND ART[0002]In recent years, refrigeration systems that employ carbon dioxide as a refrigerant have become commoditized. However, when carbon dioxide is employed as a refrigerant in a refrigeration system in this manner, there arises the problem that the density of the refrigerant and the speed of sound in the refrigerant become larger and pressure pulsation inevitably becomes larger. In order to counter this problem, in recent years, various methods of reducing pressure pulsation in refrigeration systems have been proposed (e.g., see patent citation 1, patent citation 2, non-patent citation 1 and non-patent citation 2).[0003]Patent Citation 1: JP-A No. 6-10875[0004]Patent Citation 2: JP-A No. 2004-218934[0005]Non-Patent Citation 1: Sakae Yamada and Iwao Ōtani, “Orifisu oyobi π-gata hairetsu kūkisō ni yor...

AI Technical Summary

Benefits of technology

[0048]In the refrigeration system according to the first aspect of the present invention, the pressure pulsation can be sufficiently reduced even when carbon dioxide or the like is employed as a refrigerant. In addition, in this refrigeration system, refrigerating machine oil can be prevented from collecting in the π-type silencer.

[0049]In the refrigeration system according to the second aspect of the present invention, just the communication path can be extended long without changing the size of the entire π-type silencer. In a π-type silencer, the longer the communication path is, the larger the pressure pulsation reduction effect becomes. In other words, in this refrigeration system, the pressure pulsation reduction effect can be made larger without changing the size of the entire π-type silencer.

[0050]In the refrigeration system according to the third aspect of the present invention, the pressure pulsation can be sufficiently reduced even when carbon dioxide or the like is employed as a refrigerant. In addition, in this refrigeration system, refrigerating machine oil can be prevented from collecting in the first silencing space, and just the communication path can be extended long without changing the size of the entire π-type silencer. In a π-type silencer, the longer the communication path is, the larger the pressure pulsation reduction effect becomes. In other words, in this refrigeration system, refrigerating machine oil can be prevented from collecting in the first silencing space, and the pressure pulsation reduction effect can be made larger without changing the size of the entire π-type silencer. In addition, in this refrigeration system, refrigerating machine oil can be prevented from collecting in the second silencing space. Therefore, in this refrigeration system, refrigerating machine oil can be prevented from collecting in the π-type silencer, and the pressure pulsation reduction effect can be made larger without changing the size of the entire π-type silencer.

[0051]In the refrigeration system according to the fourth aspect of the present invention, just the communication path can be extended even longer without changing the size of the entire π-type silencer. Therefore, in this refrigeration system, the pressure pulsation reduction effect can be made even larger without changing the size of the entire π-type silencer.

[0052]In the refrigeration system according to the fifth aspect of the present invention, the pressure pulsation can be sufficiently reduced even when carbon dioxide or the like is employed as a refrigerant. In addition, in this refrigeration system, the entire length of the π-type silencer can be shortened. Consequently, in this refrigeration system, the options for the disposition of the π-type silencer can be expanded.

[0053]In the refrigeration system according to the sixth aspect of the present invention, refrigerating machine oil can be prevented from collecting in the first silencing space when the refrigerant flows from the second silencing space to the first silencing space.

Problems solved by technology

However, when carbon dioxide is employed as a refrigerant in a refrigeration system in this manner, there arises the problem that the density of the refrigerant and the speed of sound in the refrigerant become larger and pressure pulsation inevitably becomes larger.

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