US 12,281,729 B2
Tube assembly, compressor, refrigeration apparatus, and method of manufacturing tube assembly
Kenji Nagahara, Osaka (JP); Yoshitomo Tsuka, Osaka (JP); Tetsuya Nagamichi, Osaka (JP); and Kousuke Araki, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on May 27, 2024, as Appl. No. 18/674,895.
Application 18/674,895 is a continuation of application No. PCT/JP2022/044556, filed on Dec. 2, 2022.
Claims priority of application No. 2021-200734 (JP), filed on Dec. 10, 2021; and application No. 2022-086943 (JP), filed on May 27, 2022.
Prior Publication US 2024/0309975 A1, Sep. 19, 2024
Int. Cl. F16L 13/08 (2006.01); F25B 41/40 (2021.01)
CPC F16L 13/08 (2013.01) [F25B 41/40 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A tube assembly comprising:
an inner tube having an outer peripheral surface first portion and an outer peripheral surface second portion, the inner tube forming a refrigerant passage of a compressor, the outer peripheral surface second portion being located inward compared with the outer peripheral surface first portion;
an outer tube having an inner peripheral surface first portion and an inner peripheral surface second portion, the outer tube forming the refrigerant passage, the inner peripheral surface first portion and the inner peripheral surface second portion having a same inner diameter, the inner peripheral surface first portion being located adjacent to an end of the outer tube, the inner peripheral surface second portion being located spaced from the end as compared with the inner peripheral surface first portion, and the outer peripheral surface first portion being press-fitted into the inner peripheral surface first portion; and
a brazing material disposed in a brazing gap between the outer peripheral surface second portion and the inner peripheral surface second portion, the brazing material fixing the outer peripheral surface second portion and the inner peripheral surface second portion.