Patents
Sitemap › F24 - Heating; Ranges; Ventilating › F24F - Air-conditioning; Air-humidification; Ventilation; Use of air currents for screening › F24F 11 - Control or safety systems or apparatus
Patents for F24F 11 - Control or safety systems or apparatus (29,222)
09/1991
09/24/1991US5050638 Device for controlling a volumetric rate of flow in a guide tube
09/24/1991US5050397 Air conditioner apparatus with starting control for parallel operated compressors based on high pressure detection
09/24/1991US5050396 Multi-system air conditioning machine
09/21/1991CA2037819A1 Relay-controlled anticipation in a two switch thermostat
09/19/1991DE4108258A1 Room ventilating and air conditioning - divides each room into zones with repeated air supply and extraction
09/18/1991CN1054677A Electronic brain temp. controller
09/18/1991CN1013990B Controller for blasting of air-conditioner
09/17/1991US5049801 Dual speed controller for attic ventilator
09/17/1991US5049044 Compressor for heat pump and method of operating said compressor
09/17/1991CA1289226C Ratchet means switch operator
09/17/1991CA1289224C Control system for air cleaner
09/11/1991EP0445580A2 Installation for controlling an air circulation system
09/11/1991EP0445368A2 Cooling and heating concurrent operation type of multiple refrigeration cycle
09/10/1991US5046549 Separate air-conditioner
09/10/1991US5046323 Multi-system air conditioner
09/05/1991WO1991013295A1 Ventilating device for shelters, in particular for mobile shelters
09/03/1991US5044425 Air conditioner having a refrigerant heater
09/03/1991CA1288272C Air terminal
08/1991
08/27/1991US5043926 Data drive type air conditioner control apparatus
08/27/1991US5042265 Controlling HVAC test functions
08/27/1991CA1288146C Temperature control system using a single ramp rate curve for control of a multiplant environmental unit
08/27/1991CA1288145C Temperature control system for control of a multiplant environment unit
08/22/1991WO1991012149A1 Ventilator fan
08/21/1991CN2083271U Automatic controller of mechanical ventilation
08/13/1991US5039010 Relay-controlled anticipation in a two switch thermostat
08/13/1991US5039009 Thermostat interface for a refrigeration system controller
08/13/1991US5039008 Air conditioner
08/08/1991WO1991011667A1 Variable air volume ventilating system and method of operating same
08/06/1991US5036676 Method of compressor current control for variable speed heat pumps
07/1991
07/30/1991CA1287145C Humidifier control means
07/30/1991CA1286908C Air volume regulator valve
07/16/1991US5031574 Control system for poultry house ventilation curtains
07/16/1991US5031412 Electronic evaporative cooler controller
07/11/1991DE4000157A1 Thermostat for temp. dependent process control - has control pin attached to strap between sides of high expansion coefficient metal ring in low expansion coefficient housing
07/09/1991CA1286019C Method of regulating room temperature and means for performing this method
07/04/1991DE3943193A1 Ventilator for room heated by electrically-controlled fireplace - has timing circuit prolonging admission of air for limited duration after disconnection of power from heater
07/03/1991EP0435487A2 Refrigeration system having a modulation valve which also performs function of compressor throttling valve
07/03/1991EP0190207B1 A valve device for the automatic control of an air intake dependent on varying humidity
07/02/1991CA1285632C Speed control of a variable speed air conditioning system
06/1991
06/29/1991CA2030413A1 Refrigeration system having a modulation valve which also performs function of compressor throttling valve
06/28/1991WO1991010101A1 Pressure controlled fresh air supply ventilation system using soil gas pressure as a reference, and method of use
06/26/1991EP0434424A2 Portable type air conditioning apparatus
06/26/1991EP0434085A2 Sensor system
06/25/1991US5025638 Duct type air conditioner and method of controlling the same
06/20/1991DE4022328C1 Aerating piles of composing refuse - by blowing or sucking air through permeable bases
06/18/1991US5024265 Zone control system providing synchronization of system operation with the zone of greatest demand
06/18/1991US5024263 Method and apparatus for the control of air flows and pressures in air-conditioning
06/12/1991EP0431563A2 Air conditioning system having a control unit for fine adjustment of inverter input current
06/11/1991US5022460 Control of staged heating and cooling apparatus by a four-wire thermostat
06/06/1991DE3942865A1 Air-flow control for greenhouse - has LV axial blowers and tiltably-mounted control flap
06/04/1991US5020332 Air conditioner and a drive apparatus therefor
06/04/1991CA1284607C Duct pressure powered air volume controller
05/1991
05/29/1991EP0428948A2 Process for energy recovery in ventilation
05/29/1991CN1012702B Air conditioner
05/28/1991US5019757 Method and apparatus for controlling a blower motor in an air handling system to provide constant pressure
05/22/1991EP0428240A2 Ventilation device, especially for internal sanitary rooms
05/16/1991DE3937481A1 Metal climatic chamber in form of pyramid - is located between inner and outer room, connected by selectively-operated valves
05/15/1991EP0427585A1 Control device and operating cycle for a flow rate regulating system of a ventilation system of a room with controlled atmosphere
05/15/1991EP0427486A2 Air conditioner apparatus
05/08/1991EP0426450A2 Method of wiring/piping confirmation of a multiple air conditioner
05/07/1991CA2029212A1 Control device of a ventilation power regulating station in a controlled atmosphere room and operating cycle thereof
05/03/1991WO1991006898A1 Dual mode pneumatic control system
05/02/1991DE3936094A1 Regulation system for ventilation and air-conditioning air outlet - uses comparison of measured pressure with calculated required value to adjust regulation path transfer function
05/01/1991CN2076214U Separated wall type air-conditioner's wired remote controller
05/01/1991CA2021800A1 Pneumatic variable air volume controller
04/1991
04/30/1991US5011076 Pneumatic temperature control
04/30/1991US5010739 Air conditioning apparatus having audible sound level control function
04/24/1991EP0423340A1 Spot air conditioner
04/24/1991CN1012449B Controlling device for air-conditioning fun
04/23/1991US5009078 Multi-system air conditioning machine
04/17/1991CN1050762A Method and device for air conditioning
04/16/1991CA1282991C Regulation of atmospheric conditions within a confined space
04/10/1991EP0421699A2 Portable air conditioning apparatus and method for controlling the same
04/10/1991EP0421459A2 Air conditioning apparatus
04/09/1991US5005636 Variable air volume ventilating system and method of operating same
04/09/1991US5005366 Air conditioning system
04/02/1991US5004149 Central air conditioning system having compensating control function for total heat load in a plurality of rooms
04/02/1991US5003865 Pressure controlled fresh air supply ventilation system soil gas pressure as a reference, and method of use
03/1991
03/27/1991EP0419448A2 Apparatus for purifying the air of individual rooms
03/27/1991EP0419214A2 System and method for fan speed control
03/26/1991CA1281935C Personal environmental module
03/20/1991CN1012103B High-precision autocontrol system of constant temp. and humidity
03/19/1991US5000382 Preset timed control for HVAC operation
03/19/1991US5000221 Flow control system
03/19/1991CA1281795C Atmosphere control apparatus
03/15/1991CA2023843A1 System for creating comfortable space
03/14/1991DE4026868A1 Room air-conditioner with facility for coolant recovery - has coolant from inner assembly forced back into outer assembly for operation with min. loss
03/13/1991EP0416715A1 Warm-up arrangement for central air conditioning system
03/13/1991EP0415911A1 Air distribution system
03/06/1991EP0415747A2 Comfort integration and energy efficient method of air conditioning
03/06/1991EP0414941A1 Drive for positioning equipment
03/06/1991EP0414940A1 Drive for positioning equipment
03/05/1991US4997030 Central air conditioning system having remote controller in a plurality of rooms for starting or stopping air conditioning apparatus
03/05/1991US4997029 Air conditioning apparatus
03/01/1991CA2024221A1 Comfort integration and energy efficient method of air conditioning
02/1991
02/28/1991DE3927063A1 Ventilating system e.g. for asbestos disposal - has two multi-stage ventilation units connected with inner space of building across monitor and signal response units
02/27/1991EP0414638A1 Ventilating installation
02/27/1991EP0414331A1 Changeover arrangement for a central air conditioning unit
02/27/1991EP0414231A2 Control device for heat collection type ventilation equipment
02/27/1991CN1011814B Air conditioner and method of dehumidifier control
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