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| Number | Title | Issue Date |
| 7997506 | Air conditioning system An air conditioning system can automatically increase or decrease a desired temperature of an indoor unit at a variable gradient smaller than the variable gradient per predetermined time of an outdoor temperature. Hence, the user does not have to directly change the... | 08/16/2011 |
| 7891574 | Differential temperature display system A differential temperature display system for balancing hydronic systems includes a first sensor for sensing a supply temperature and for outputting a first signal indicating the supply temperature. A second sensor is adapted for sensing a return temperature and for... | 02/22/2011 |
| 7317970 | Remote sensing for building automation A line of sight temperature sensor in a thermostat allows placement at locations other than on a wall. For example, the thermostat is positioned in a ceiling, allowing easier wiring access. Wall placement may be used. By remotely sensing user selection associated wi... | 01/08/2008 |
| 7261241 | Heating and cooling energy saving device A system for regulating the temperature of multiple areas within a facility using multiple energy savings devices (ESD) that each regulate the temperature of individual rooms or areas within a facility having a central heating and cooling plant. The device includes ... | 08/28/2007 |
| 7208704 | Heating device with thermostat switch A system for wiring a heating element in an electrical appliance to a conventional thermostat switch in a new manner and a new thermostat for supporting the new wiring system. The new wiring system avoids switching the full heating element current for both hot power... | 04/24/2007 |
| 7198402 | Method for determining an interior temperature of a passenger area of a motor vehicle, arrangement for execution of the method, and a temperature sensor A signal (Snormal) is provided to a heat element of a temperature sensor, which is recorded as a step response (Lruh, Lbew). From the difference of the step response compared with the reaction adaptively determined with the temperatu... | 04/03/2007 |
| 7191826 | Variable speed fan motor control for forced air heating/cooling system A fan motor speed control system for controlling the fan motor speed of an air conditioning system includes a power output circuit including a power triac which is turned on and off by an opto-isolator connected to a pulse generator circuit for varying an AC voltage... | 03/20/2007 |
| 7172018 | Vehicle air-conditioning system A vehicle air-conditioning system improves a passenger's sensation of cooling by preventing air blown from a foot opening when a cooling load is low, creating a comfortable temperature distribution along the passenger's body. The vehicle air-conditioning system auto... | 02/06/2007 |
| 7073442 | Apparatus, systems and methods for use in three-dimensional printing Apparatus, systems and methods for use in three-dimensional printing are shown and described. Various embodiments of the invention allow for more precise and controlled delivery of heat to achieve interlayer drying; isolation of the working region from the outside f... | 07/11/2006 |
| 7017659 | Vehicle air-conditioning system A vehicle air-conditioning system adjusts the temperature at an outlet by a combined amount of air flowing through a first bypass passage adjusted by an air mixing door and air flowing through a second bypass passage adjusted by a cool air adjusting door independent... | 03/28/2006 |
| 7007857 | Compact vehicle heating apparatus and method A compact vehicle heating system and method is provided which includes mechanisms to selectively shut down heating systems. For example, when domestic hot water is required, space heating and engine preheating systems can be shut down in order to provide priority he... | 03/07/2006 |
| 6957696 | Combination radiant and forced air climate control system A method and controller for controlling the operation of a zoned climate control system including a primary heat source, a secondary heat source, a cooling unit, and a humidifier unit. The controller is configured to receive both heating demand signals and cooling d... | 10/25/2005 |
| 6945324 | Controlling method for the discharge of coolant medium in the heat exchange wind box The invention relates to a controlling method of the discharge of coolant medium, and more particularly to a controlling method of the discharge of coolant medium in the heat exchange wind box. By mainly controlling the discharge of coolant medium in the heat exchan... | 09/20/2005 |
| 6945323 | Automotive air conditioning system An automotive air conditioning system includes: an air conditioning duct having an outlet; an evaporator; a heater core; an air mix door that divides air passing through the air conditioning duct into to pass through the heater core and to bypass the heater core; an... | 09/20/2005 |
| 6868900 | Multiple zone automatic HVAC control system and method A multiple zone electronic control system and method are provided to control a heating, ventilation and air conditioning (HVAC) system for a vehicle. The control system includes a plurality of sensors to provide inputs relating to multiple zones of an occupant compa... | 03/22/2005 |
| 6793016 | Vehicle air conditioning system with seat air conditioning unit A vehicle air conditioning system includes a space air conditioning unit for blowing conditioned air into a passenger compartment, a seat air conditioning unit for blowing air into a vehicle seat, and a control unit for controlling the space air conditioning unit an... | 09/21/2004 |
| 6695046 | Variable speed fan motor control for forced air heating/cooling system A fan motor speed control system for controlling the fan motor speed of an air conditioning system includes a power output circuit including a power triac which is turned on and off by an opto-isolator connected to a pulse generator circuit for varying an... | 02/24/2004 |
| 6684944 | Variable speed fan motor control for forced air heating/cooling system A forced air heating and/or cooling system utilizing an induction type fan motor is controlled by a controller circuit which is operable to continuously vary the speed of the fan motor during a start-up phase and a shut-down phase of the heating and/or co... | 02/03/2004 |
| 6640890 | Multiple zone automatic HVAC control system and method A multiple zone electronic control system and method are provided to control a heating, ventilation and air conditioning (HVAC) system for a vehicle. The control system includes a plurality of sensors to provide inputs relating to multiple zones of an occ... | 11/04/2003 |
| 6591622 | Automatic temperature control A method and device (18) to control the temperature T in a refrigerator or freezer cabinet (10), which keep a set temperature in a space (12) in the cabinet. The space is refrigerated by an element (14) of an intermittently operating refrigerating machine... | 07/15/2003 |
| 6575233 | Combination radiant and forced air climate control system A method utilizing a controller for controlling the operation of a zoned climate control system including a primary heat source, a secondary heat source, a cooling unit, and a humidifier unit. The controller is configured to receive both heating demand si... | 06/10/2003 |
| 6508303 | Air supply control device An air supply control device for use in the heating, cooling, and conditioning of an air supply to a predetermined temperature. The device includes a cooling unit that is adapted to cool the air passing through the unit. The device incorporates a variable... | 01/21/2003 |
| 6454179 | Method for controlling a heating system and heating system A heating system has several heating devices with valves, controlled in dependence of the temperature, in different rooms, with the heating devices being supplied by a supply device with an adjusting member which acts upon a supply temperature. A control ... | 09/24/2002 |
| 6449533 | Thermostat and method for controlling an HVAC system with remote temperature sensor A thermostat adapted to be connected to a climate control system for operating the climate control system. The thermostat comprises a main unit having a microprocessor, a keypad connected to the microprocessor for operating the thermostat, and a sub-base.... | 09/10/2002 |
| 6431457 | Air heater control A heater control system is operable to modulate a heater of a building or warehouse or the like, in order to maintain the temperature rise of air passing through the heater at or below a maximum allowable temperature rise value. The maximum allowable temp... | 08/13/2002 |
| 6390381 | Control unit and process for adjusting the heating loops in large area heating systems and to control the adjusted heating loops A control system for the room temperature in large area heating systems comprises a feed-line manifold and a return-line manifold and for each heating loop an electrically activated throttle valve. A control-unit automatically adjusts the throttle degree ... | 05/21/2002 |
| 6360958 | Vehicle air conditioning apparatus with hot water flow control In an air conditioning apparatus for a vehicle, an amount of hot water flowing from an engine into a heater core is adjusted by a flow control valve so that temperature of air blown from the heater core is adjusted. A water pump driven by the engine is di... | 03/26/2002 |
| 6336592 | Thermal control for a test and measurement instrument A cooling system for a test and measurement instrument including a variable-speed fan, useful with different instruments having different configurations, employs a plurality of sensors disposed at predetermined locations within an enclosure of the instrum... | 01/08/2002 |
| 6308702 | Compact high-efficiency air heater A compact high efficient air heater providing improved comfort regulation. The air heater includes a cross-flow type heat exchanger formed from a plurality of stacked corrugated plates which define a plurality of alternating flue gas passages and air pass... | 10/30/2001 |
| 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 |
| 6234398 | Motor vehicle automatic HVAC control with open loop transient compensation An improved performance and cost-effective control for an automatic motor vehicle HVAC system in which the system variables are controlled without regard to a measured in-car temperature during steady-state conditions, and in which the steady-state contro... | 05/22/2001 |
| 6123146 | Air conditioning installation with an external temperature estimator, especially for a motor vehicle A motor vehicle air conditioning installation has a cold loop, a hot loop, a sensor for measuring cabin temperature, a manual setting unit for setting demand values of cabin air parameters, and a control unit for defining the resulting required adjustment... | 09/26/2000 |
| 5992156 | Air conditioning system for vehicles An air conditioning system for vehicles has a cooling circuit and a radiator supplying cooling water to an engine. The cooling circuit includes a compressor, a condenser and an evaporator. The system includes a water temperature sensor for detecting a wat... | 11/30/1999 |
| 5983989 | Method and apparatus for controlling discharged-air temperature for vehicular air-conditioning system Disclosed is a system for controlling discharged-air temperature for a vehicular air-conditioning system, comprising a duct, a cooling medium circuit, a heating medium circuit, an air-mixing unit, and an automatic air-conditioning ECU. The automatic air-c... | 11/16/1999 |
| 5937940 | Method and system for predicting air discharge temperature in a control system which controls an automotive HVAC system Method and system for predicting air discharge temperature in a control system which controls an automotive HVAC (heating, ventilation and air conditioning) system using a model. The model is based on signals generated by various climate control sensors a... | 08/17/1999 |
| 5931376 | Device for air-conditioning control in an air-conditioned room having textile machines The description relates to a device for air conditioning control in an air-conditioned room containing textile machines, especially circular spinning and spooling machines, with an air feed and an air discharge duct connecting the air-conditioned room to ... | 08/03/1999 |
| 5878950 | Transit vehicle heater A supplementary vehicle heater is provided which includes a burner, a heat exchanger, a coolant conduit connected to the heat exchanger and a coolant pump connected to the conduit. There are controls which are operatively connected to the burner and the c... | 03/09/1999 |
| 5832990 | Automatic temperature control method and apparatus for an automotive vehicle An automatic interior temperature control system for an automotive vehicle capable of controlling heat flux in response to changes in ambient temperature, outlet temperature, sun load and air flow by taking into account the relationship between these four... | 11/10/1998 |
| 5810078 | Apparatus and method for the environmental control of vehicle interiors An apparatus and method for controlling the air condition and heating within a vehicle interior compartment, in which the apparatus includes a fan (13), heat exchangers (14, 15), temperature sensors (26, 27, 28) and a solar sensor (29) and temperature con... | 09/22/1998 |
| 5775582 | Method and apparatus for regulating heater cycles to improve fuel efficiency A method and apparatus for improving heating system efficiency. An electronic circuit senses a firing signal from a boiler energy value sensor such as a thermostat or pressuretrol. The circuit prevents the boiler energy value sensor from firing the burner... | 07/07/1998 |
