US 11,815,316 B2
Heat exchanger and heat pump system having same
Yutaka Shibata, Osaka (JP); Tomoki Hirokawa, Osaka (JP); and Hirokazu Fujino, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Aug. 10, 2022, as Appl. No. 17/885,156.
Application 17/885,156 is a continuation of application No. PCT/JP2021/004958, filed on Feb. 10, 2021.
Claims priority of application No. 2020-021016 (JP), filed on Feb. 10, 2020.
Prior Publication US 2022/0381519 A1, Dec. 1, 2022
Int. Cl. F28D 9/00 (2006.01); F28F 3/04 (2006.01)
CPC F28D 9/005 (2013.01) [F28F 3/048 (2013.01); F28F 2260/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A heat exchanger, comprising:
a first layer comprising first flow channels that are microchannels and arranged to extend side by side, wherein
a first one end-side collective flow channel is in fluid communication with first ends of the first flow channels, and
a first other end-side collective flow channel is in fluid communication with second ends of the first flow channels; and
a second layer that is laminated on the first layer and that comprises second flow channels that are microchannels and arranged to extend side by side, wherein
a second one end-side collective flow channel is in fluid communication with first ends of the second flow channels, and
a second other end-side collective flow channel is in fluid communication with second ends of the second flow channels, wherein
the first ends and the second ends of the first flow channels are positioned to align respectively in a direction perpendicularly crossing a direction in which the first flow channels extend,
the first ends and the second ends of the second flow channels are positioned to align respectively in a direction perpendicularly crossing a direction in which the second flow channels extend,
the first one end-side collective flow channel and the first other end-side collective flow channel each comprise first microchannels extending in a direction perpendicularly crossing a direction in which the first flow channels extend,
the second one end-side collective flow channel and the second other end-side collective flow channel each comprise second microchannels extending in a direction perpendicularly crossing a direction in which the second flow channels extend,
a dimensional ratio of width dimensions of the first microchannels in a direction perpendicular to a lamination direction of the first layer and the second layer with respect to a dimension of the first flow channels is greater than one and equal to or less than three, and
a dimensional ratio of width dimensions of the second microchannels in the direction perpendicular to the lamination direction with respect to a dimension of the second flow channels is greater than one and equal to or less than three.