Resources Contact Us Home
Air conditioner for vehicles

Image Number 2 for United States Patent #5769316.

An air conditioner for a vehicle has a heat pump type refrigerant circuit capable of operating at least in a heating mode. The air conditioner comprises a motor fan for supplying air heated by a heat exchanger to the interior of the vehicle during operation of the heating mode, a sensor for detecting the temperature of the air at a position downstream of the heat exchanger and a control unit for controlling the volume of the air supplied by the motor fan to a predetermined minimum volume by controlling the drive of the motor fan when the detected air temperature is lower than a predetermined temperature. Even in a condition where a sufficiently large heat radiation from the heat exchanger cannot be expected, a large volume of cold air that has been insufficiently heated can be prevented from being discharged into the interior of the vehicle. Because the motor fan is driven at a condition of minimum air volume even when the detected temperature is lower than the predetermined temperature, a rapid variation of air volume caused at the time of changing a fan-stopping condition to a fan-driving condition can be avoided and an abnormal increase in the discharge pressure of the heat pump compressor can be prevented.

  Recently Added Patents
Cosmetic/dermatological compositions comprising naphthoic acid compounds and polyurethane polymers
Fan guide
Fixing device, fixing device control method, and image forming apparatus
Methods and systems for creating a tail risk hedge index and trading derivative products based thereon
Method of and apparatus for recording motion picture, which generate encoded data with higher compression efficiency using a motion vector similarity
Imaging device
High performance actuator motor
  Randomly Featured Patents
Differential displacement optical sensor
Method for selective heteroepitaxial III-V compound growth
.beta.1 6 N-acetylglucosaminyltransferase, its acceptor molecule, leukosialin, and a method for cloning proteins having enzymatic activity
Molybdenum-platinum-oxide electrodes for thermoelectric generators
Single transistor/capacitor semiconductor memory device and method for manufacture
Equipment cabinet
Use of kernel authorization data to maintain security in a digital processing system
Bottle cover
Vinyl chloride polymer composition modified for transparency, impact and thermal resistance
Plastic leadframe and compliant fastener