US 12,228,346 B2
Chilling unit
Takahito Hikone, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/610,597
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Aug. 7, 2019, PCT No. PCT/JP2019/031080
§ 371(c)(1), (2) Date Nov. 11, 2021,
PCT Pub. No. WO2021/024403, PCT Pub. Date Feb. 11, 2021.
Prior Publication US 2022/0221228 A1, Jul. 14, 2022
Int. Cl. F28D 7/16 (2006.01); F28F 1/04 (2006.01)
CPC F28D 7/1653 (2013.01) [F28F 1/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A chilling unit comprising:
a plurality of air heat exchangers each including a plurality of heat transfer tubes and a plurality of fins; and
a machine room unit which is formed in the shape of an elongated box and on which the plurality of air heat exchangers are provided,
wherein the plurality of air heat exchangers each have a long-side portion that extends in a longitudinal direction of the machine room unit, each of the plurality of air heat exchangers including a first header pipe and a second header pipe or a distributor in an area close to an end portion of the long-side portion, the first header pipe being connected with an end portion of one of the plurality of heat transfer tubes corresponding to an inlet for refrigerant, the second header pipe or the distributor being connected with an end portion of another one of the plurality of heat transfer tubes corresponding to an outlet for the refrigerant,
the plurality of air heat exchangers include two pairs of air heat exchangers, the pairs of air heat exchangers are arranged side by side in the longitudinal direction, and the air heat exchangers of each of the pairs of air heat exchangers are opposite to each other in a lateral direction of the machine room unit,
the air heat exchangers of each pair are inclined such that a spacing between upper end portions of the air heat exchangers that are located far from the machine room unit is greater than a spacing between lower end portions of the air heat exchangers that are located close to the machine room unit, and
wherein in each pair, the first header pipe and the second header pipe or the distributor of one or both of the air heat exchangers are located at a unit end portion of the machine room unit in the longitudinal direction, and in at least one of the air heat exchangers, at the unit end portion of the machine room unit, heat transfer tubes that protrude from an outermost one of the plurality of fins in a direction in which the plurality of fins are arranged and that extend linearly to the first header pipe and the second header pipe or the distributor in the lateral direction are not provided.