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| Number | Title | Issue Date |
| 7028913 | Process for humidifying the useful space in an incubator and in a controlled atmosphere incubator For humidifying a work space in a gas-fed incubator, water in a heatable pan in the floor area of an inner container surrounding the work space is evaporated with temperature-controlled heating of the interior until a predetermined temperature is reached, whereby a ... | 04/18/2006 |
| 6997389 | Method and apparatus for delivering conditioned air using pulse modulation A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space whe... | 02/14/2006 |
| 6986469 | Method and apparatus for energy recovery in an environmental control system Control apparatus for an environmental control system comprises input circuitry receiving environmental information and output circuitry for controlling an HVAC system. Processing circuitry in the controller configures the output circuitry based at least in part on ... | 01/17/2006 |
| 6976052 | Spa control system An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an... | 12/13/2005 |
| 6965815 | Spa control system An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an... | 11/15/2005 |
| 6860431 | Strategic-response control system for regulating air conditioners for economic operation A strategic response control for an air conditioning system for use in an environment with increased power rates during a designated peak period. The air conditioning system includes a power board for operating the air conditioning system in one or more operating st... | 03/01/2005 |
| 6837441 | Thermostat with clock-burst control of trip point The present invention is directed at a thermostat using a clock burst to control a temperature trip point without the use of an external resistor. A clock burst is applied to a clock input pin from which a counter is used to count the number of pulses. The output of... | 01/04/2005 |
| 6584792 | Method for driving an output stage by pulse-width modulation In a method for driving an output stage by pulse-width modulation, which driving serves to supply a unit cooling the output stage during operation, at a higher temperature of the output stage a style of driving is performed which results in a low power lo... | 07/01/2003 |
| 6533186 | Method for controlling a floor heating system A method for controlling a floor heating system, in which a heating circuit in a room is supplied with a heat carrying fluid within a cycle for a supply period, with the supply period being chosen in dependence of the room temperature. To operate the floo... | 03/18/2003 |
| 6205799 | Spray cooling system A spray cooling system for semiconductor devices. An ink-jet type spray device sprays droplets of a cooling fluid onto the semiconductor devices. The devices vaporize the liquid, which gets passed through a roil bond panel, or other heat exchanger, and is... | 03/27/2001 |
| 6095427 | Temperature control system and method for efficiently obtaining and maintaining the temperature in a conditioned space A method for efficiently maintaining the temperature of fluid in a conditioned space at a predetermined set point temperature, the method comprising the steps of: (a) operating the temperature control system in a first operating mode; (b) sensing the temp... | 08/01/2000 |
| 6062482 | Method and apparatus for energy recovery in an environmental control system A method of controlling an HVAC system includes measuring environmental and/or physical parameters associated with the controlled space, and making operational decisions based on those parameters. Control apparatus is also provided comprising input circui... | 05/16/2000 |
| 5971284 | Apparatus for regulating heater cycles to improve forced-air heating system efficiency A method and apparatus of regulating cycles of a burner in a forced air heating system. A control unit uses a sensor at an output of a heat exchanger to make measurements of a temperature of air output from the heat exchanger. The control unit observes te... | 10/26/1999 |
| 5809994 | Electronic control system for a heating apparatus A temperature control system for melting a solid cooking medium in a deep fat fryer comprising a chamber for containing a cooking medium; a heating surface within the chamber for heating the cooking medium; a heating device for heating the heating surface... | 09/22/1998 |
| 5743100 | Method for controlling an air conditioning system for optimum humidity control A method of operating a heat pump or air conditioner system is provided. The air conditioner comprises a compressor, a condenser, an expansion device, a cooling coil and an air mover (blower). According to the preferred embodiment, the air mover (blower) ... | 04/28/1998 |
| 5688422 | Programmable fan control method and apparatus for use in a food oven A cooking device for cooking food comprising a cavity, a heating element disposed in the cavity, a temperature sensor for determining the temperature in the cooking device and a fan operable in at least three modes, an OFF mode, a HI mode and a LO mode to... | 11/18/1997 |
| 5482210 | Poultry environmental control systems and methods A poultry house controller (14) situated within a poultry house (12) regulates the relative humidity and temperature within the poultry house (12) via actuation of fans (22) and heaters (24) in response to temperature and humidity feedback signals from te... | 01/09/1996 |
| 5467922 | Poultry environmental control systems and methods A poultry house controller (14) situated within a poultry house (12) regulates the relative humidity and temperature within the poultry house (12) via actuation of fans (22) and heaters (24) in response to temperature and humidity feedback signals from te... | 11/21/1995 |
| 5452999 | Temperature regulating system, method and apparatus A temperature regulating system (preferably a cooling system) for a cyclic processor comprising a mould having at least one internal passageway for receiving temperature regulating fluid, preferably coolant water. Continuous fluid flow will overcool the m... | 09/26/1995 |
| 5392845 | Air-conditioning device An air-conditioning device capable of obtaining a suitable blow-out temperature through one passage from the initial period of change even when the air-conditioning operation in which either a first passage or a second passage is closed is changed into an... | 02/28/1995 |
| 5355938 | Temperature control device A temperature control device with high accuracy and stability comprising a heating device and a cooling device which are controlled by separate control circuits for performing proportional control, integral control, derivative control and the like. A rati... | 10/18/1994 |
| 5326026 | Energy and peak-load conserving thermostat and method with controlled deadband A thermostat is disclosed for controlling a heating system, particularly a forced hot-air furnace, so as to improve fuel efficiency and decrease peak fuel load. The thermostat controls the length of fuel-on cycles, so that the heat exchanger of the furnac... | 07/05/1994 |
| 5325678 | Temperature controller apparatus Temperature controller apparatus for generating a control signal for supply to a control device which controls the temperature inside a chamber. The apparatus includes a plurality of input devices each receiving an indication of the temperature at a respe... | 07/05/1994 |
| 5273105 | Air conditioning apparatus for an automobile A heater core 21 is connected to an engine cooling water line via an inlet passageway 43 and a return passageway 45. A first valve 25a is provided for controlling the amount of high temperature water introduced to the heater core 21, and a second valve 25... | 12/28/1993 |
| 5244146 | Energy-conserving thermostat and method A thermostat is described for controlling a furnace for a hot air, hot water, or steam heating system which delivers heat to a heated space via a delivery system. The thermostat causes the system to conserve energy by limiting the "burn" or on-time cycle ... | 09/14/1993 |
| 5213259 | Paint booth humidity and temperature control system Humidity control system for regulating the relative humidity of air which is forced through a spray painting booth. The humidity control system employs a water spray nozzle which atomizes water to quickly change the relative humidity and temperature of th... | 05/25/1993 |
| 5190096 | Car air conditioning equipment with temperature variation system to avoid occupant boredom with constant temperature air Car air conditioning equipment comprising: an air feeding device for feeding a constant amount of air; air-blow outlets for blowing air with an adjusted temperature into a car interior; an interior temperature detector for detecting a temperature in the c... | 03/02/1993 |
| 5135162 | Process and equipment designed to control a burner for heating systems Apparatus for controlling a heat generating device having automatic adjustment of water temperature to heating requirements, and also for protecting such devices from being switched "on" and "off" too frequently, includes a control relay or a main relay h... | 08/04/1992 |
| 5039008 | Air conditioner An air conditioner having an indoor unit placed in a room to be heated or cooled, and a draft directing apparatus, such as a vertically tilting louver, which can assume a first position directing an outlet draft toward the location where a user is normall... | 08/13/1991 |
| 5027611 | Air conditioner for use in an automotive vehicle Disclosed is an air conditioner for use in an automotive vehicle. The air conditioner includes a timer circuit for deciding whether or not a given period of time has elapsed after an engine of the automotive vehicle has been started, an air quantity contr... | 07/02/1991 |
| 4938684 | On-off burner control by cycle time variation The burners of a fuel-fired system are controlled by means of a feedback control system for temperature control. The control system comprises temperature measuring means, a controller for temperature control, final burner controlling means translating the... | 07/03/1990 |
| 4928750 | VaV valve with PWM hot water coil A refrigeration system for temperature conditioning several comfort zones includes several VAV (variable air volume) valves each having a hot water coil conveying water whose flow rate is regulated by a PWM (pulse-width modulated) solenoid valve. Each VAV... | 05/29/1990 |
| 4916291 | Electric drying apparatus automatic controller This invention relates to an electric drying apparatus automatic controller which automatically controls an electric drying apparatus in order to dry the articles put therein within a shortest period of time and with minimized power consumption. The contr... | 04/10/1990 |
| 4901915 | Control apparatus for water temperature and water flow rate A control apparatus for water temperature and water flow rate includes a mixing valve adapted to be supplied with hot water and cold water from a hot water source and a cold water source, respectively, and delivers mixed water. In addition, the control ap... | 02/20/1990 |
| 4897526 | Kiln automatic power level switching and display mechanism A kiln firing cycle controller is disclosed which automatically cycles a hobbyist kiln through its low, medium, and high power level phases. The exemplary embodiment includes a control panel having a firing cycle initiating control knob. Manipulation of t... | 01/30/1990 |
| 4858677 | Automobile air-conditioning apparatus with air blower control An automobile air-conditioning apparatus with air blower control air-conditions the passenger compartment of an automobile by cooling and/or heating air delivered from an air blower into the compartment. During a period in which the compartment starts bei... | 08/22/1989 |
| 4850310 | Boiler control having reduced number of boiler sequences for a given load To reduce the number of boiler sequences over time executed for a given heating load without adversely affecting boiler efficiency, the call signal applied to the boiler to initiate a sequence in response to a demand for heating is delayed as a function o... | 07/25/1989 |
| 4842192 | Microprocessor controlled thermostat for dryer A thermostat controlled circuit for a bias heater located adjacent the thermostat connected to a source of alternating electrical power. The control circuit has a manually operated switch for providing a temperature level signal. A triac having a gate ter... | 06/27/1989 |
| 4832258 | Measuring circuit for use in device for detecting ambient air temperature A device for controlling an opening angle of an air mixing damper used in an automotive air conditioning system is disclosed. The device has an actuator for operating the air mixing damper and a blower for blowing the air. The device comprises an ambient ... | 05/23/1989 |
| 4798935 | Driver circuit A driver circuit having a predetermined on time and a predetermined off time provides a drive signal to a heating element of an aroma generating apparatus. The drive signal is applied during each positive half cycle of the input AC voltage while maintaini... | 01/17/1989 |
