Patent ID: 6978628
Filing Date: 2005-12-27
Classification: B60H

Abstract:
1. An air conditioning device for a vehicle comprising: a refrigeration cycle having a compressor for compressing and blowing out a coolant, a first heat exchanger for air-cooling the coolant blown out from the compressor, that are mounted on a vehicle having a travel use motor; an air conditioner inverter for controlling the rotational speed of the compressor by feeding electric power to said compressor; electric parts related to the travel use motor and for producing electric power in relation to the travel use motor; a radiator arranged downstream of the first heat exchanger in series in a direction in which the cooling air flows for air-cooling the cooling water that cools said air conditioner inverter and said electric parts related to the travel use motor; cooling water temperature detector means for detecting the temperature of said cooling water that flows out from said radiator; and air conditioner inverter protection means for lowering the output of said air conditioner inverter when the temperature of the cooling water detected by said cooling water temperature detector means exceeds a preset protection temperature; wherein the second heat exchanger arranged in a duct that introduces the air into the compartment to cool the air by the coolant, wherein said air conditioning control means decreases the amount of heat absorbed by the coolant through said second heat exchanger when the temperature of the cooling water detected by said cooling water temperature detector means is higher than a setpoint value; and the air conditioning device further comprises an internal/external air change-over door that changes over to either an external air introduction mode for introducing the air into said duct from outside the compartment or an internal circulation mode for circulating the air in the compartment, wherein said air conditioning control means is internal/external air change-over control means for changing said internal/external air change-over door over to the internal air circulation mode when the temperature of the cooling water detected by said cooling water temperature detector means is higher than the setpoint value.