On-vehicle cooler

Abstract

To suppress vibration of a cooling water pump.SOLUTION: An on-vehicle cooler 100 includes a refrigerant cooling circuit, a battery cooling circuit, cooling water pumps 22, 32 and a fan shroud 45. The cooling water pumps 22, 32 are mounted to the fan shroud 45 so that rotating axes 22a, 32a thereof are located on the same straight line and rotating directions thereof are reverse to each other.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a structure of an on-board cooling device having a plurality of cooling water pumps. [Background technology]

[0002] 2. Description of the Related Art Cooling devices are used that cool refrigerants in internal combustion engines and air conditioners by circulating cooling water with a cooling water pump (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-241990 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, electric vehicles that run on motors have come into widespread use. Electric vehicles are equipped with multiple cooling circuits to cool the motor, PCU, and refrigerant for the air conditioning system. Each of the multiple cooling circuits is equipped with a cooling water pump that circulates the cooling water. In this case, the vibration of the cooling water pump when rotating can be transmitted to the body, resulting in high noise levels inside the vehicle.

[0005] Therefore, an object of the present disclosure is to suppress vibration of a cooling water pump. [Means for solving the problem]

[0006] The vehicle-mounted cooling device of the present disclosure is an vehicle-mounted cooling device comprising a plurality of cooling circuits through which coolant circulates, a plurality of coolant pumps for circulating coolant through each of the cooling circuits, and a base on which the plurality of coolant pumps are mounted, and is characterized in that each of the coolant pumps is mounted on the base so that the rotation axes of adjacent coolant pumps are on the same straight line and rotate in opposite directions to each other. Effect of the Invention

[0007] As a result, when the multiple cooling water pumps rotate, the inertial forces caused by the rotations cancel each other out, thereby suppressing vibration of the cooling water pumps and reducing the noise level inside the vehicle cabin. [Brief description of the drawings]

[0008] [Figure 1] 1 is a system diagram showing a configuration of an in-vehicle cooling device according to an embodiment; [Diagram 2] FIG. 2 is an elevational view of a fan shroud with a cooling water pump mounted thereon. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a vehicle-mounted cooling device 100 will be described with reference to the drawings. As shown in Fig. 1, the vehicle-mounted cooling device 100 includes two cooling circuits: a refrigerant cooling circuit 20 that cools a refrigerant circulating in a refrigeration circuit 10 for air conditioning, and a battery cooling circuit 30 that cools a battery 31.

[0010] The air conditioning refrigeration circuit 10 circulates the refrigerant compressed by the compressor 11 through the refrigerant flow path 12a of the condenser 12, the pressure reducing valves 13 and 15, the refrigerant flow path 14a of the evaporator 14, and the refrigerant flow path 16a of the chiller 16. The refrigerant cooling circuit 20 circulates the cooling water through the cooling water flow path 12b of the condenser 12 and the cooling water flow path 21a of the radiator 21 using a cooling water pump 22. The battery cooling circuit 30 circulates the cooling water through the cooling water flow path 31a of the battery 31, the cooling water flow path 33a of the radiator 33, and the cooling water flow path 16b of the chiller 16 using a cooling water pump 32 to cool the battery 31. The battery cooling circuit 30 also includes a switching valve 34 that switches the flow path so as not to pass the cooling water through the radiator 33.

[0011] The condenser 12 is a heat exchanger between the high-temperature, high-pressure refrigerant compressed by the compressor 11 and the cooling water, and cools the high-temperature, high-pressure refrigerant to a liquid refrigerant. The temperature of the cooling water that flows into the cooling water flow path 12b of the condenser 12 increases due to heat exchange with the refrigerant. The cooling water exchanges heat with the outside air in the radiator 21, is cooled, and flows back to the cooling water pump 22. The refrigerant that becomes liquid in the condenser 12 is reduced in pressure by the pressure reducing valve 13 to a low temperature, and flows into the refrigerant flow path 14a of the evaporator 14. The low-temperature refrigerant exchanges heat with the air in the vehicle cabin in the evaporator 14, cools the air, and flows back to the compressor 11. A part of the refrigerant that becomes liquid in the condenser 12 is reduced in pressure by the pressure reducing valve 15, flows through the refrigerant flow path 16a of the chiller 16, and flows back to the compressor 11. The refrigerant cools the cooling water circulating in the battery cooling circuit 30 in the chiller 16.

[0012] The radiator 21 of the refrigerant cooling circuit 20 and the radiator 33 of the battery cooling circuit 30 are attached to a radiator support 40 provided at the front of the vehicle. A fan shroud 45 is attached to the rear of the radiators 21, 33. A radiator fan 42 is attached to the center of the fan shroud 45.

[0013] 2, fan shroud 45 is a metal plate-like member provided with a circular opening of approximately the same diameter as the impeller of radiator fan 42. Two cooling water pumps 22, 32 are attached to fan shroud 45. Thus, fan shroud 45 is a base on which cooling water pumps 22, 32 are attached.

[0014] As shown in Fig. 2, the two cooling water pumps 22, 32 are attached adjacent to the fan shroud 45 so that the rotating shafts 22a, 32a of the cooling water pumps 22, 32 are on the same straight line 50. In addition, as shown by arrows 91 and 92 in Fig. 2, the two cooling water pumps 22, 32 rotate in opposite directions. In other words, the cooling water pumps 22, 32 are attached to the fan shroud 45 so that the rotating shafts 22a, 32a are on the same straight line and rotate in opposite directions. In this case, the cooling water pumps 22, 32 may be attached back-to-back to each other.

[0015] As a result, when the two cooling water pumps 22, 32 rotate, the inertial forces caused by the rotations cancel each other out, so that vibrations of the cooling water pumps 22, 32 can be suppressed and the noise level inside the vehicle cabin can be reduced.

[0016] In the above description, the in-vehicle cooling device 100 has been described as including two cooling circuits, the refrigerant cooling circuit 20 and the battery cooling circuit 30, and two coolant pumps 22, 32, but is not limited to this. As long as a plurality of cooling circuits and a plurality of coolant pumps are included, for example, three cooling circuits and three coolant pumps may be included, and the three coolant pumps may be attached to the fan shroud 45. In this case, the three coolant pumps are attached to the fan shroud 45 so that the rotation axes of adjacent coolant pumps are on the same straight line and rotate in opposite directions to each other.

[0017] Furthermore, the multiple pumps may be attached to a member other than the fan shroud 45, so long as the rotation axes of adjacent cooling water pumps are aligned on the same line and rotate in opposite directions. [Explanation of symbols]

[0018] 10 refrigeration circuit, 11 compressor, 12 condenser, 12a, 14a, 16a refrigerant flow path, 12b, 16b, 21a, 31a, 33a cooling water flow path, 13, 15 pressure reducing valve, 14 evaporator, 16 chiller, 20 refrigerant cooling circuit, 21, 33 radiator, 22, 32 cooling water pump, 22a, 32a rotating shaft, 30 battery cooling circuit, 31 battery, 34 switching valve, 40 radiator support, 42 radiator fan, 45 fan shroud, 100 automotive cooling device.

Claims

[Claim 1] A plurality of cooling circuits through which cooling water circulates; A plurality of cooling water pumps for circulating cooling water through each of the cooling circuits; a base on which the plurality of cooling water pumps are attached, Each of the cooling water pumps is attached to the base so that the rotation axes of adjacent cooling water pumps are on the same straight line and rotate in opposite directions to each other; An in-vehicle cooling device comprising:

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