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
Mirror elements for EUV lithography and production methods therefor
Nonvolatile semiconductor memory device
Data processor with virtual machine management
Sampling switch circuit that uses correlated level shifting
Systems and methods for programming an RFID reader
LED light
Electromagnetic probe for measuring properties of a subsurface formation
  Randomly Featured Patents
Fluorine-containing elastomer and its composition
Emergency lighting test system and method
Method of forming ionically-charged, encapsulated colorant nanoparticles
Method and apparatus to control tension in a trailing cable and/or waterhose for a mining machine
Multifunctional personal emergency response system
Hand held suction nozzle with metal detector
Solar light bar
Electronic input device, system, and method using human-comprehensible content to automatically correlate an annotation of a paper document with a digital version of the document
Air filtering device
System and method for distinguishing leaks from a disengaged canister condition in a reduced pressure treatment system