Cooling apparatus
AssigneeDenso Corporation
InventorTakahiro Maeda
Life of this patent
Estimating the term…
Abstract
A cooling apparatus includes: a water circuit; a ventilation heat exchanger that heats cooling water by heat exchange with air discharged to outside; a motor generator cooling unit; a motor bypass circuit that bypasses the motor generator cooling unit; and a flow rate control unit. When a temperature of the cooling water flowing between the ventilation heat exchanger and a motor flow rate controller is lower than or equal to a temperature of oil circulating inside the motor generator, the flow rate control unit increases a flow rate of the cooling water that flows from the ventilation heat exchanger into the motor bypass circuit.
Claims5
A cooling apparatus comprising:
- a water circuit configured to circulate cooling water to cool a motor generator that is a power source for traveling;
- a ventilation heat exchanger in which heat is exchanged between the cooling water flowing through the water circuit and air discharged from inside of a cabin to outside of the cabin to heat the cooling water;
- a motor generator cooling unit configured to cool the motor generator by heat exchange between the cooling water flowing out of the ventilation heat exchanger and the motor generator;
- a motor bypass circuit that bypasses the motor generator cooling unit for the cooling water flowing out of the ventilation heat exchanger;
- a motor flow rate controller configured to control a flow rate of the cooling water flowing from the ventilation heat exchanger to the motor generator cooling unit and a flow rate of the cooling water flowing from the ventilation heat exchanger to the motor bypass circuit;
- a temperature determiner that determines whether a temperature of the cooling water flowing between the ventilation heat exchanger and the motor flow rate controller is higher than a temperature of oil circulating inside the motor generator;
- and
- a flow rate control unit configured to control the motor flow rate controller to increase the flow rate of the cooling water flowing from the ventilation heat exchanger to the motor generator cooling unit when the temperature determiner determines that the temperature of the cooling water flowing between the ventilation heat exchanger and the motor flow rate controller is higher than the temperature of oil circulating inside the motor generator, wherein
- the flow rate control unit is configured to control the motor flow rate controller to increase the flow rate of the cooling water flowing from the ventilation heat exchanger to the motor bypass circuit when the temperature determiner determines that the temperature of the cooling water flowing between the ventilation heat exchanger and the motor flow rate controller is lower than or equal to the temperature of oil circulating inside the motor generator.
Dependencies are inferred from the claim text.