Step-by-step Patents (Class 236/76)
  • Patent number: 8260444
    Abstract: The disclosure provides an auxiliary controller of a HVAC system, a method of manufacturing a HVAC system, a method of starting a HVAC system and a HVAC system. In one embodiment, the HVAC system includes: (1) a main system controller having a main non-volatile memory and configured to direct operation of the HVAC system and store main controller application information associated therewith on the main non-volatile memory (2) an auxiliary controller having (2A) an interface coupled to the main system controller and configured to communicate therewith, (2B) a processor, coupled to the interface and configured to direct the operation of a component of the HVAC system and (2C) an auxiliary non-volatile memory configured to receive a copy of the main controller application information via the interface and store the main controller application information thereon.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: September 4, 2012
    Assignee: Lennox Industries Inc.
    Inventors: Glenn Will Kowald, Darko Hadzidedic
  • Patent number: 5203499
    Abstract: In a process and apparatus for controlling an interior temperature of a motor vehicle a nominal temperature is set and is used with a sensed interior space temperature to produce a difference value which is fed to a controller (R). The controller produces a controlling value from the difference value which it feeds to an output stage (E) for cyclically and directionally driving a DC motor (M) which adjusts the position of an adjustable member (SG) to influence an amount of heat fed to an interior space (I) of the motor vehicle. A position signal of the adjustable member is measured and fed in a control loop in order to ensure an exact and dependable positioning of the adjustable member, with the positioning signal being formed by measuring and analyzing partial movements of the DC motor through predetermined angles for activations and further rotation of the DC motor.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: April 20, 1993
    Assignee: Hella KG Hueck & Co.
    Inventor: Otto Knittel
  • Patent number: 4955431
    Abstract: A device and method for cooling an internal combustion engine is disclosed in which a simple control circuit constructed of relatively inexpensive components enables the rotational speed of an electric motor employed in the cooling device to be controlled in adaptation to various temperature levels of a cooling circuit. The control circuit includes a power semiconductor which is used to drive the electric motor in certain speed ranges associated with predetermined temperature levels. The control circuit also incorporates a bypass circuit that permits the electrical motor to be driven in particular speed ranges without the use of the power semiconductor. Thus, the electric motor can be driven at one hundred percent of its speed capacity by eliminating a voltage drop associated with the power semiconductor.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: September 11, 1990
    Assignee: Behr-Thomson Dehnstoffregler GmbH
    Inventors: Roland Saur, Rolf Schaper
  • Patent number: 4485863
    Abstract: A control device is used in a car-mounted air-conditioner of the air mixing type, in which a portion of the cold air, obtained by passing air through an evaporator, is heated by a heater via an air mixing damper. The control device includes a pulse generator, which is supplied with the outputs of a temperature setting device and of a room temperature sensor both of which are provided in a car in which the air-conditioner is mounted. The control device provides an amplified multi-phase pulse signal, based on deviations of the outputs, to an intermittent driving device responsive for rotating the air mixing damper.
    Type: Grant
    Filed: December 2, 1981
    Date of Patent: December 4, 1984
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Churyo Engineering Co., Ltd.
    Inventors: Yukio Yoshida, Akira Tanaka, Ryutaro Fukumoto, Ryosaku Akimoto, Shigetoshi Tanaka, Nobuaki Ito