Matches 1 - 50 out of 97 1 2 >
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7013966 Vehicle air conditioner with hot-gas heater cycle  
A vehicle air conditioner selectively switches one of a cooling mode in which an interior heat exchanger of a refrigerant cycle is operated as an evaporator for cooling air, and a hot-gas heating...
7003377 Controlling cooling air intake for air cooled equipment  
A method and apparatus for supplying cooling air to electronic equipment from ones of at least two sources. A detector detects whether the quality, such as the temperature of the cooling air from a...
6698512 Vehicle heating and air conditioning system including a dual mode manual temperature selector  
An improved vehicle heating and air conditioning system includes a driver-manipulated temperature selector that is physically coupled to a discharge temperature control mechanism. The selector is...
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...
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...
6155341 Continuous fan adjustment method  
A method for adjusting the continuous speed of the blower of a heating and/or cooling system of the type including a thermostat having a mode selector switch which has at least one heating...
5984004 Method and an arrangement for cooling or heating a machine casing  
For cooling and/or heating a machine casing, a method and an arrangement is disclosed in which the machine casing is provided with cooling channels in which pipes are received. Between the pipes...
5937942 Electronic programmable thermostat with temporary reset  
An electronic programmable thermostat having a program set made up of a plurality of program start times and program temperature values for a daily time period which can be automatically vacated...
5720179 Methods and apparatus for controlling the temperatures of a plurality of rooms  
The temperatures of a plurality of rooms are controlled by a refrigerant cycle which enables a user to select desired room temperatures and one of the following operating modes: (i) supplying hot...
5699857 Vehicle climate control multiplex system  
An automotive heater, ventilation and air conditioning (HVAC) control system reduces overall system cost and improves system reliability by reducing the number of wire interconnects between the...
5460221 Fan coil thermostat with circuitry to assure minimum power for relay pull-in  
A thermostat capable of accommodating primary and secondary loads is taught. Preferably a hydronic valve actuator is the primary load and a fan coil of variable speed is the secondary load....
5311451 Reconfigurable controller for monitoring and controlling environmental conditions  
A highly distributed direct digital process control system for use in controlling a fully distributed process includes at least one device controller independently monitoring and controlling a...
5277244 Relay contact monitoring system  
A switching system for switching on and off heating and air conditioning units in an environmental control system. The switching system includes a thermostat and a relay conductively coupled to the...
5230482 Electronic time thermostat with a temporary next period adjustment means  
A thermostat having a temporary "now" and "next" functions. The temporary "next" function allows the user to program a temporary deviation from a preprogrammed schedule used to control the...
5201364 Apparatus for heating and cooling food articles having removable plates with fluid sealed therein  
An apparatus is disclosed for heating or cooling food articles including a chamber containing a plurality of tubular, vertically, spaced-apart support means having a fluid inlet and outlet. A...
5184122 Facility management system with improved return to automatic control  
There is disclosed a control system for use, for example, in facility management which controls an environmental parameter to maintain the parameter at a given set point. A PID Controller is...
5176006 Air-conditioner with installation position detection output compensating temperature  
The position where an indoor unit is actually installed is manually instructed by an installation position confirmation element. A temperature correction value selector selects and outputs, from a...
5092394 Switching panel and system for controlling zoned heating and cooling systems  
A zoned heating and cooling system is controlled by a switching panel with a controlling thermostat in a first zone, and an additional thermostat in each additional zone. A switching element...
5038851 Electronic programmable thermostat for a heating and cooling system with an oscillation control mechanism  
The programmable thermostat includes a sensor for sensing the ambient temperature within the predetermined volume of space, a timer for generating the current time of day, and a memory for storing...
5022460 Control of staged heating and cooling apparatus by a four-wire thermostat  
A heating and cooling apparatus wherein either or both the heating apparatus and cooling apparatus are two-stage is controlled by a thermostat through four connecting wires. A signal on one of the...
4953630 Apparatus for controlling an automobile air-conditioner to control defrost bleed air  
An automobile air-conditioner controlling apparatus is equipped with a determination means for determining the amount of air bleeding from a defroster outlet, based on at least the outside...
4932466 Relay panel and system for controlling zoned heating and cooling systems  
A zoned heating and cooling system is controlled by a relay panel with a controlling thermostat in a first zone, and an additional thermostat in each additional zone. A relay corresponding to each...
4898230 Air conditioner with an energy switch  
An air conditioner comprises a control portion and a refrigeration system wherein a compressor, a condenser, an expansion device and an evaporator are connected in a refrigerant flow relationship....
4884626 Combination refrigerator oven  
A self-contained refrigerator-oven for refrigerating and cooking food in the same enclosed chamber, has both heating elements and cooling elements located in the same appliance. The heating...
4829884 Blowout temperature control system  
In a blowout temperature control system of an air conditioner for use in vehicles, a temperature detected by a ventilation duct sensor is weighted by a first weighting ratio which varies depending...
4784214 Control system for a recreational vehicle's air-conditioning/heating unit  
A secondary control system (10) for a RV's air-conditioning/heating system. Conventional roof-mounted RV heating and cooling units have a primary control for selectively energizing the...
4751961 Electronic programmable thermostat  
An electronic thermostat includes selectable multiple predetermined temperature programs of desired temperatures over a repetitive time cycle. A manually operable temperature program selector...
4741476 Digital electronic thermostat with correction for triac self heating  
The present invention is an electronic thermostat having correction for the self heating due to the semiconductor switching device used to switch a temperature modifying apparatus on. This...
4733719 Electronic thermostat with a stored program of desired temperatures and predetermined maximum and minimum temperatures  
An electronic thermostat including a stored program of desired temperatures and predetermined maximum and minimum temperatures. The stored program of desired temperatures is selectable as either a...
4694890 Analog computer variable duty modulator  
A control system for heating and cooling devices is disclosed which increase the total running time for the heating and cooling devices as the ambient temperature sensed deviates from the set-point...
4683939 Electronic thermostat with selectable mode to control heating only, cooling only or both heating and cooling  
A programmable electronic thermostat having selectable modes to control heating only, cooling only or both heating and cooling. This electronic thermostat enables an operator to program a series of...
4635708 Electronic thermostat for heating and cooling system  
A programmable electronic thermostat for use in a building having a furnace and an air conditioning system adapted to generate energizing signals for the furnace and the air conditioner. An...
4633908 Manually operated mode-selecting valve device  
A manually operated mode-selecting valve device allowing pressurized air to be transmitted to a plurality of working agents so as to actuate them simultaneously with the movement of a single valve...
4606401 Programmable thermostat  
A programmable thermostat employing means for sensing the ambient temperature on the thermostat, a clock for generating digital electrical signals representative of real time, a programmable...
4534406 Thermostat  
An electronic thermostat with a mode selection switch for selective application of actuation signals to different output control terminals for connection with control of either cooling or heating...
4441545 Air conditioning thermostatic control system having modular inclusion of remote temperature set-back capability  
Methods and circuits for providing auxiliary or remote temperature set or set-back capability in comparator-based thermostatic temperature control systems. In particular, the invention is...
4433719 Portable, remote environmental control system  
A portable thermostat is coupled to the control unit of a heating or cooling device through a radio link. The RF signal transmitted by the thermostat is encoded and then decoded by the control unit...
4418744 Air conditioning control system with user power up mode selection  
A user-operable power-up mode switch included within an electronic air conditioning mode control circuit of the type including momentarily-actuated user mode selection switches and a volatile mode...
4411306 Thermostat with improved temperature sensing circuit  
A thermostat with a single control to establish the quantity of set back during heating and set up during cooling.
4386649 Programmable thermostatic control device  
A programmable thermostatic control device for controlling the temperature within a preselected zone of an enclosed environment. The device can be readily installed and utilizes an interface unit...
4385659 Heating and cooling thermostat set points limits set by changeover lever  
A time controlled thermostat provides the setting up or setting down of space temperature during certain selected time periods depending on whether it is controlling heating or cooling apparatus as...
4364234 Control circuitry for thermoelectric environmental chamber  
Circuitry for controlling the temperature of a thermoelectric environmental chamber includes a pair of digital switches for selecting any desired temperature between -10 degrees C. +79 degrees C.,...
4355681 System for controlling a vehicle mounted air conditioner  
A vehicle mounted air conditioner controlling system is disclosed and of which system comprises a vacuum mode controlling switch (41) being controlled by depression of push-button switches (56) for...
4354547 Discharge air temperature control device having reference temperature control function for air conditioning system for automotive vehicles  
A discharge air temperature control device which is provided in an air conditioning system for automotive vehicles, the device comprising a lever assembly for adjusting the angular position of an...
4337822 Digital thermostat  
An energy conserving thermostatic control system having digitally implemented control functions for use with a heating and/or air conditioning system is disclosed. The digital thermostat includes...
4323111 Temperature control device for automobile air conditioner  
A temperature control device for an automobile air conditioner including an electronic control circuit for regulating air temperature in the automobile, by automatically actuating a temperature...
4311190 Self contained heating and cooling system with emergency heating  
A self contained heating and cooling system is disclosed comprising a heat pump unit having a heat exchanger for heating and cooling air in a space, an auxiliary heating unit for heating air in the...
4290481 Electronic thermostatic control for a heat/cool room air conditioning system  
An electronic thermostatic control for a heat/cool air conditioning unit and with variable temperature anticipation useful when the unit is located above or below the room's normal zone to...
4262738 Air conditioning apparatus for vehicle  
A plurality of movable dampers (23), (26), (31) are provided in an air flow duct (12) to control the temperature and air flow therethrough. A heater core (19) and/or air conditioner evaporator (18)...
4250955 Self-service replenishable food cabinet  
A series of like-shelved, convertible refrigerating and heating cabinets, accessible from either one of two sides thereof through self-closing glass doors for self-service and replenishment of...
Matches 1 - 50 out of 97 1 2 >