US 12,305,564 B2
Arrangement structure of cooling system in construction equipment
Yoshihiko Hayashi, Tokyo (JP); Keigo Hara, Tokyo (JP); and Motoyuki Suzuki, Tokyo (JP)
Assigned to Caterpillar SARL, Geneva (CH)
Appl. No. 16/086,222
Filed by Caterpillar SARL, Geneva (CH)
PCT Filed Apr. 3, 2017, PCT No. PCT/EP2017/057873
§ 371(c)(1), (2) Date Sep. 18, 2018,
PCT Pub. No. WO2017/174520, PCT Pub. Date Oct. 12, 2017.
Claims priority of application No. 2016-076995 (JP), filed on Apr. 7, 2016.
Prior Publication US 2020/0291845 A1, Sep. 17, 2020
Int. Cl. F01P 3/18 (2006.01); B60K 11/04 (2006.01); E02F 9/08 (2006.01); F01P 3/20 (2006.01); F01P 5/06 (2006.01); F01P 11/02 (2006.01); F28D 1/04 (2006.01)
CPC F01P 3/18 (2013.01) [B60K 11/04 (2013.01); E02F 9/0866 (2013.01); F01P 3/20 (2013.01); F01P 5/06 (2013.01); F01P 11/029 (2013.01); F28D 1/0443 (2013.01); F01P 2003/182 (2013.01); F01P 2060/02 (2013.01); F01P 2060/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cooling system for construction equipment having an operating room positioned in front of a machine room with the cooling system being provided in the machine room, the cooling system comprising:
a plurality of heat exchangers disposed in a frame member, the frame member including a first side, a second side, a top side and a bottom side, the heat exchangers comprising:
a plurality of lower tier heat exchangers, each of the lower tier heat exchangers disposed below a tank space and under a reservoir tank capable of pressure adjustment, wherein the plurality of lower tier heat exchangers are disposed inside the frame member and include a first lower tier heat exchanger and a second lower tier heat exchanger, wherein the first lower tier heat exchanger is a radiator, wherein the radiator is disposed between the bottom side and the second lower tier heat exchanger; and
an upper tier heat exchanger disposed above the lower tier heat exchangers and disposed laterally adjacent to the reservoir tank;
a cooling fan that supplies cooling air flow to the lower tier heat exchangers and the upper tier heat exchanger, wherein an upper tier horizontal width of the upper tier heat exchanger is shorter than a lower tier horizontal width of the lower tier heat exchangers forming the tank space above the lower tier heat exchangers, the tank space oriented laterally to the upper tier heat exchanger and disposed radially outward of the cooling fan, the tank space partially defined by first and second outer surfaces of a stepped concave part of the frame member, the stepped concave part including a bottom section and a side section that intersects the bottom section, wherein the bottom section includes the first outer surface, and the side section includes the second outer surface, the second outer surface oriented perpendicular to the first outer surface and parallel to the first side and the second side of the frame member, the first outer surface oriented to extend horizontally in a plane X, the plane X oriented to extend in a horizontal direction from the first side of the frame member to the second side of the frame member and in a horizontal direction from a front of the frame member to a back of the frame member, the first side of the frame member disposed below the reservoir tank, the second side of the frame member disposed opposite to the first side, the reservoir tank disposed above the bottom section, the bottom section disposed between the upper tier heat exchanger and the radiator; and
the reservoir tank connected in parallel with the radiator in a cooling water circulation system between an engine and a water pump of the construction equipment, wherein the reservoir tank is disposed in the tank space above the radiator and does not extend above the upper tier heat exchanger, wherein the reservoir tank is configured to store a liquid phase and a gas phase, and is further configured to adjust a storage volume of the liquid phase based on a volume change and a temperature change of the liquid phase,
wherein the lower tier heat exchangers are disposed entirely below the plane X, and the upper tier heat exchanger is disposed entirely above the plane X, and a height of the cooling system does not deteriorate a rear-view field of vision from the operating room.