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| Number | Title | Issue Date |
| 6318096 | Single sensor mixing box and methodology for preventing air handling unit coil freeze-up A method of controlling the mixing of outside air and return air, entering an air handling unit, through inlets having dampers, the air handling unit having a coil for conditioning the incoming air and a fan for blowing the conditioned air into a conditio... | 11/20/2001 |
| 6304803 | HVAC control system for an automobile A heating, ventilation, and air conditioning system for a vehicle including a front HVAC control system that communicates with a rear HVAC control system. The rear HVAC control system includes a control panel having mode, temperature, and blower speed con... | 10/16/2001 |
| 6296193 | Controller for operating a dual duct variable air volume terminal unit of an environmental control system The flow air from a hot air duct and a cold air duct into a zone of a building is controlled in based upon performing a thermal energy balance calculation for the zone. That calculation produces a heat transfer setpoint from which a hot air flow setpoint ... | 10/02/2001 |
| 6241154 | Air conditioning device An air conditioning device has a controller, a fan motor, a by-path strangler, and a heat exchange pipe. The fan motor is disposed in front of the heat exchange pipe. The by-path strangler is disposed between the fan motor and the heat exchange pipe. The ... | 06/05/2001 |
| 6179044 | Vehicle air-conditioning device A vehicle air-conditioning device with a rear air-conditioning unit does not having a temperature control device, yet prevents excessive hot air blow temperatures when the fan blow is low. A heat exchanger for heating the air blow from the blower is insta... | 01/30/2001 |
| 6112807 | System and method for defogging a vehicle window There is disclosed a system and method for preventing fogging of the windows of an automotive vehicle. The system and method operate the air conditioning system of the vehicle at temperatures where a high degree of probability of fogging exists. The metho... | 09/05/2000 |
| 6079626 | Terminal unit with active diffuser In building environmental control, primary HVAC services are distributed to multiple terminal units. An active diffuser terminal unit has a variable speed fan to controllably draw room air into the unit for reheating the air; and, conversely, to force con... | 06/27/2000 |
| 6019288 | Heating or air conditioning unit A heating or air conditioning unit for the interior of vehicles with air outlets, which are disposed in the center plane of the interior of the vehicle, particularly in the dashboard and which include at least one centrally disposed center vent and two si... | 02/01/2000 |
| 6016964 | Air-mix door control device for automobile air-conditioning system An air-mix door control device for an automobile air-conditioning system home-position-sets the air-mix door for the full-hot position or the full-cool position when it is necessary to control an air-mix door for a new target opening position other than a... | 01/25/2000 |
| 6012515 | System and method for automatically controlling cabin air temperature in an aircraft A system and method for automatically controlling cabin air temperature TCBN in an aircraft having a cabin and a mixed air delivery system. The mixed air delivery system provides a flow of mixed air having an actual mixed air temperature into t... | 01/11/2000 |
| 5988515 | Air conditioning system and method for vehicles In a system and method for conditioning air in a vehicle, it is determined whether an inside air temperature detected by an inside air temperature sensor is stable, an outside air temperature is estimated based on the inside air temperature only when the ... | 11/23/1999 |
| 5908154 | Air conditioning apparatus in an air conditioning system for use in a vehicle In the air conditioning apparatus, the air conditioning amplifier unit e is connected to the plurality of door actuators through a single communication line and a single power source line, and also there is provided a fan motor maximum voltage limit contr... | 06/01/1999 |
| 5904293 | Air mix controller of automobile air conditioner Control parameter (target opening) Xm is stored in a memory and the Xm value stored in the memory is used instead of a PBR value to calculate a deviation S value by a conventional control system. Change amount ƊXm of a first-order lag is found in respons... | 05/18/1999 |
| 5850873 | Method for reducing vapor generation in a temperature controlled liquid holding tank A method is provided for reducing vapor generation in a temperature controlled fuel tank in a motor vehicle. The method cooperates with an apparatus having hot and cold fluid sources (20, 22), a heat exchanger (18) having hot and cold valves (26, 24) and ... | 12/22/1998 |
| 5848640 | Apparatus for controlling the temperature of fuel in a motor vehicle fuel tank An apparatus for controlling the temperature of fuel in a motor vehicle fuel tank is described. The apparatus includes a cold valve (24) fluidly interposed between a cold fluid source (20) and a cooling portion (50) of a heat exchanger (18) and a hot valv... | 12/15/1998 |
| 5833133 | Microprocessor-controlled semi-automatic temperature control device A semi-automatic temperature control (SATC) device for controlling a heating, ventilation and air conditioning (HVAC) system includes a microprocessor operative to receive a plurality of inputs, and control air discharge temperature and blower speed based... | 11/10/1998 |
| 5820020 | Air-mixing door opening-degree control device for an automotive vehicle air-conditioning system An air-conditioner amplifying means and a plural number of door actuators are connected by a single communication line, which transmits target stop-position data of the individual doors in accordance with predetermined locations. Target door opening-degre... | 10/13/1998 |
| 5803355 | Control system of automotive air conditioning device A control system of automotive air conditioning device comprises a heater/cooler unit having therein a plurality of control doors by which various air flow modes are provided. A plurality of identical actuators are employed for actuating the control doors... | 09/08/1998 |
| 5558274 | Dual duct control system The present invention relates to a dual duct control system for use in an environmental control system. The dual duct control system is preferably utilized in a dual duct VAV box. The control system advantageously receives room temperature values, mixed a... | 09/24/1996 |
| 5425502 | VAV air conditioning system with a by-pass air supply fan A VAV air conditioning system has a micro-computer control device, a main fan motor, a by-pass fan motor, a heat exchange pipe assembly. The micro-computer control device has a function setting unit, temperature detecting units, a central processing unit ... | 06/20/1995 |
| 5407002 | Multiple-zone air circulation control system An air circulation system is used to control the temperature in an area defined by a series of zones. The system has a hot deck and a cold deck, and a series of ducts each extending from the downstream side of the decks to a respective zone. A damper in e... | 04/18/1995 |
| 5359860 | Method and apparatus for controlling a temperature in a refrigerating chamber of a refrigerator A method and apparatus for controlling a temperature in a refrigerating chamber of a refrigerator by sensing the temperature of cold-air by firsh and second temperature sensors disposed in the vicinity of cold-air suction and in feed ports, and finely adj... | 11/01/1994 |
| 5350113 | Air flow control system and method for a dual duct system A dual-duct HVAC system for providing a desired comfort level in a room, includes a controller that carries out a simple operation that determines the total open damper positions for dual dampers in a dual duct system to effect a desired air flow. Using t... | 09/27/1994 |
| 5346127 | Air conditioning system with enhanced dehumidification feature An air conditioning system is provided with indoor and outdoor air. Since the moisture content of the outdoor air is the major factor in determining the resulting humidity of the indoor space to which conditioned air is supplied, outdoor air is cooled to ... | 09/13/1994 |
| 5342027 | Damper position control device for automotive air conditioning system A damper position control device for use in an automotive air conditioning system. The damper position control device includes a motor actuator which rotates an air mix damper in forward and reverse directions, an electric power source, and an electric po... | 08/30/1994 |
| 5337574 | Heating and cooling system for a building A reversible vapour compression refrigeration plant serves as an air conditioner for cooling or as a heat pump for heating. A main stream of inlet air is divided into separate main and bypass streams of air and proportion of flow between the two streams i... | 08/16/1994 |
| 5333783 | Automated air mixing system An air handling system is provided which includes sections for the introduction of outside or ambient air relative to a structure to be mixed with a flow of inside or return air in a flow path in which the resulting mixture is impelled by a fan to be disc... | 08/02/1994 |
| 5318099 | Method and apparatus for emulating a perimeter induction unit air conditioning system A method and apparatus for emulating a perimeter induction unit, in which the perimeter induction unit is replaced by an emulation unit carried in a plenum above the space to be heated or cooled. A temperature sensor is mounted within the space, and a com... | 06/07/1994 |
| 5293928 | Air-conditioner for automobiles An automobile air-conditioner wherein a controlled variable used to determine the control mode of a component of the air-conditioner is corrected or restricted according to the amount of shifting of the head part setting temperature for driving the compon... | 03/15/1994 |
| 5257958 | Pressure override control for air treatment unit A control for an air treatment unit, such as a space heater having a heat source and an air handler that draws air from outside the space and from within the space in order to form a combined stream of air that is discharged to the space. The control incl... | 11/02/1993 |
| 5244035 | Air-conditioner for automobiles An automobile air-conditioner wherein a controlled variable used to determine the control mode of a component of the air-conditioner is corrected or restricted according to the amount of shifting of the head part setting temperature for driving the compon... | 09/14/1993 |
| 5203499 | Process and apparatus for controlling an interior space temperature of a motor vehicle 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... | 04/20/1993 |
| 5186237 | Multi-zone HVAC system with an air bypass for individual flow control An automotive heater and air conditioning system has multiple zones each supplied by a separate air flow passage serviced by a common blower and common heat exchangers. One of the passages has an adjustable air flow mechanism which bypasses some air from ... | 02/16/1993 |
| 5176201 | Vehicular air conditioner with manually operated bypass door operable only in full cool mode An automatic air conditioner for an automotive vehicle is arranged to be controlled by a control system and comprised of a heater unit disposed within an air conditioner duct to heat air inducted through an air inlet. A bypass air passage is provided to f... | 01/05/1993 |
| 5152335 | Automobile air conditioning system with cool air bypass passage having manual control mode An automobile air conditioning system has a bypass air passage for directing air, before it is heated, to a car interior via a vent outlet. A bypass door is disposed in the bypass air passage, which has an opening which is automatically controlled accordi... | 10/06/1992 |
| 5135161 | Reduced noise trim air system Audio noise created by trim valves (66a-72a) in a warm air trim system (24) of an air cycle air conditioning system (10) is reduced by controlling the pressure drop across the trim valves as a function of the position of the valves (66a-72a). A proportion... | 08/04/1992 |
| 5117899 | Air handling apparatus The air handling apparatus provides a separate heating mixing air deck and a separate cooling mixing air deck each with their own return air and outdoor air supplies to maximize indoor air directed to the heating deck and monitor the cooling deck to utili... | 06/02/1992 |
| 5086830 | Air-conditioning system for motor vehicles An air-conditioning system for motor vehicles having an evaporator and a heat exchanger arranged successively in the air flow. A separate air duct having an air outlet opening for the central jet, is connected on the one hand via a cold-air opening to an ... | 02/11/1992 |
| 5086628 | Automotive air tempering apparatus An air tempering apparatus for use in an automotive vehicle including a duct having a first passage through which tempered air is discharged into a front compartment portion in front of the front seats and a second passage through which tempered air is di... | 02/11/1992 |
| 5080282 | Air conditioning apparatus An air conditioning apparatus comprises an automatically controlled mixing box for an air conditioning system wherein a triple inlet mixing box has a cold air inlet, a hot air inlet, a return air inlet, and a fan for inducting and disbursing the air mixed... | 01/14/1992 |
