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7458222 |
Heat exchanger apparatus for a recirculation loop and related methods and systems
A heat exchanger apparatus enables the temperature of a liquid located external to the apparatus in a recirculation loop to be controlled by heat transfer within the apparatus. A manifold fitting...
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6889764 |
Cooling device and cooling method
A cooling device for cooling an object to be processed to a target temperature comprises a plurality of contact members mounted on a placing table, for supporting the object such that the object...
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6742582 |
Modular climate control unit
An apparatus for internal climate control. The apparatus comprises an inlet and outlet for air, a tangential fan that rotates about a vertically oriented axis, a fan coil assembly through which air...
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6671175 |
Assembly of computer peripherals
An assembly of computer peripherals, which has the functions of (temperature control and fan rotation speed regulation, includes a host casing, a temperature sensing circuit, a fan driver circuit,...
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6427772 |
Electronic refrigeration control system
The present invention is direct to a system and method for electronically controlling the refrigeration and/or heating of the product storage compartment in a vending machine. The system includes a...
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6134134 |
Thermostat voltage adapter
The present invention is a voltage adapter for a low voltage thermostat which permits the following input voltage ranges: 100-132 VAC/50 or 60 Hz, 200-264 VAC/50 or 60 Hz, and 265-330...
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6089310 |
Thermostat with load activation detection feature
A thermostat for control of an AC-operated HVAC unit (or a unit providing only heating or only cooling) is provided with load activation detection sensing for increased reliability of latching...
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5878811 |
Apparatus and method for the controlled cooling of chemical tanks
An apparatus for the controlled cooling of chemical tanks containing a chemical which must be kept at a first prescribed temperature includes at least one heat-exchanger coil immersed inside a...
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5819845 |
Temperature control method for a heating/cooling system
A temperature control method and apparatus therefor controls an air temperature in a room by determining an error temperature between a set temperature and an actual room temperature. An auxiliary...
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5646358 |
High accuracy weathering test machine
A weathering testing machine or the like is provided with improved stabilization of conditions such as temperature and humidity, coupled with more accurate readout from sensors on a moving member...
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5592989 |
Electronic thermostat having high and low voltage control capability
An electronic thermostat having high and low voltage control capability and varied functional capabilities. The thermostat is particularly suited for use with fan coil heating and cooling units....
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5582237 |
Apparatus for preventing thermal deformation of a machine tool
An apparatus for preventing thermal deformation of a machine tool has a feed unit which heats a heat transfer fluid and pumps it out to a heat exchanging portion. The heat exchanging portion has at...
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5560422 |
Controller for air conditioner
A controller for an air conditioner is provided wherein an operation mode is not unnecessarily changed in accordance with variations in temperature. When room temperature t is in a range of...
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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...
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5520327 |
Electronic thermostat having safety feature
An electronic thermostat having a safety feature includes a controller which sends control signals to circuitry used for activating a system for conditioning air. The control signals are used to...
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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....
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5452762 |
Environmental control system using poled diodes to allow additional controlled devices in existing four wire system
An environmental control system for controlling heating, ventilation, humidification and air conditioning equipment located in plant area of a house includes a kit consisting of a remote control...
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5450727 |
Thermoelectric cooler controller, thermal reference source and detector
A thermoelectric cooler controller, a thermal reference source employing the controller, a thermal reference source, and a thermal calibration system. The controller controls the temperature of a...
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5381954 |
Temperature control apparatus
A temperature control apparatus and method which utilizes a characteristic of a temperature detection device which detects temperature over a wide range of changing temperature and makes it...
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5352930 |
System powered power supply using dual transformer HVAC systems
A power supply to supply power to a secondary system. The power supply is adapted to receive power from a plurality of primary systems. The power supply having a first rectifier which supplies...
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5320162 |
Single pole double throw thermostat for narrow range temperature regulation
A thermostat is disclosed having a bimetallic strip actuating a single pole, double throw switch, one throw to sense temperatures below the lower limit of a set point range and the other throw to...
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5277034 |
Air conditioning system
An air-conditioning system for a cooling operation and a heating operation comprises a first heat exchanger to which a high-pressure and high-temperature refrigerant which has not been...
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5224648 |
Two-way wireless HVAC system and thermostat
A building automation system comprising: means for conditioning air; means, associated with the air conditioning means, for distributing the conditioned air to at least one space to be conditioned...
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5211713 |
Temperature control method with simultaneous heating and cooling near the set-point
A temperature control method for controlling a temperature in a chamber comprises the steps of: providing heating means which can select large and small heating powers for heating the chamber and...
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5161606 |
Interactive electronic thermostat with minimum and maximum temperature thermal limit switches
An interactive electronic thermostat operates to communicate with an installer through an audible or visual display and keypad to instruct the installer to perform tasks and enter observations to...
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5154226 |
Automatic changeover thermostat with single bi-metal and common set lever having individual heat and cool setpoint indicators
A single bimetal automatic changeover thermostat has heating, cooling and changeover switches mounted to the bimetal. A single control point adjustment lever for rotating the bimetal has separate...
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5103896 |
Air-conditioning system and operation method thereof
An air conditioning for a room of a high-rise building, for example, is carried out in consideration of the difference in temperatures in a central interior zone and a circumferential perimeter...
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4984628 |
Apparatus for maintaining liquid temperature at a constant level
An apparatus for maintaining liquid temperature at a constant level comprises a reaction vessel for containing liquid, a cooling device connected with the reaction vessel for cooling the liquid, a...
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4919196 |
Three-stage mercury switch for operation between the heating and cooling mode
There is disclosed a thermostat controlled apparatus which controls the operation of a heating system and a cooling system in response to temperature variations in a given environment. The...
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4917174 |
Supply airflow control for dual-duct system
Two variable position supply air valves, one for modulating warm airflow to a comfort zone and the other for modulating cool airflow, each have a constant intermediate open position to provide at...
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4914925 |
Control device for an air conditioner
A control device for an air conditioner operable in the heating and cooling operation mode is disclosed, which device comprises a "too hot" and a "too cold" switch which is operated by the user...
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4898229 |
Thermostat with integral means for detecting out-of-phase connection of a two-transformer power source
A low-voltage space thermostat for controlling operation of a heating and cooling system is provided with integral circuit means for detecting the existence of an unacceptably high voltage...
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4881591 |
Oven for the burn-in of integrated circuits
Over for the burn-in of integrated circuits (12), comprising: a chamber (B) for receiving such circuits (12); first means (4), for heating such integrated circuits (12) in the chamber (B) with the...
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4773587 |
Heating and air conditioning fan sensor control
A device is disclosed which causes a fan of a heating and/or air conditioning system to continue to run until the temperature in the duct work of the system reaches a desired temperature, so as to...
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4691760 |
Cooling and visor defogging system for an aircraft pilot and crew
An improved thermal control system for flight apparel worn in an aircraft. An environmental control system (11) produces both a flow of cold air in a duct (12) and a flow of warm air in another...
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4615380 |
Adaptive clock thermostat means for controlling over and undershoot
A clock operated thermostat that provides setup temperature from an energy saving temperature is disclosed. The amount of overshoot caused in the space in which the thermostat is installed is...
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4542783 |
Refrigeration equipment
A refrigeration equipment having a compressor, a condenser, an evaporator and a thermostatic expansion valve with an equalizer line and capable of controlling its refrigeration capacity, wherein...
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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...
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4446913 |
Auto changeover thermostat with means for handling temperature entry errors
A thermostat used to control a temperature conditioning system to heat or cool a comfort zone to a heating setpoint and a cooling setpoint. The thermostat is microcomputer based and includes both a...
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4388692 |
Electronically controlled programmable digital thermostat having variable threshold hysteresis with time
An electronic digital programmable wall thermostat system for controlling heating and cooling systems supplying an indoor area or space. The thermostat includes a digital clock, a display for...
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4333519 |
Controller for air conditioning units, heating units and the like
A controller (10) for air conditioning units, heating units, and the like is disclosed. The controller (10) regulates the activation and deactivation of an energy consuming component of the unit,...
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4313308 |
Temperature control with undercool protection
Electronic control apparatus is disclosed for automatically controlling the operation of refrigeration units on truck-drawn trailers which includes an undercool comparator (240) connected to a...
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4156454 |
Oven with refrigerated food storage based on thermal exchange fluid
An oven, which maintains food at a low temperature to preserve its properties for subsequent unattended cooking at high oven temperatures, is cooled and heated by a flowing liquid thermal exchange...
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4132262 |
Heating and cooling blanket
A cooling and heating blanket comprising a blanket enclosure with heating means including a plurality of flexible elements positioned within the enclosure for being electrically energized for...
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4031950 |
Process fluid circulation and temperature control system
A process liquid circulation and temperature control system including a pump for circulating water or other process liquid through a path including a heating unit, a cooling unit, and a process...
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3848664 |
HEATING/COOLING APPARATUS
Heating/cooling apparatus includes a heating circuit for re-circulating heated fluid to a heating device, a cooling circuit for re-circulating cooled fluid to a cooling device, the flow path in the...
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3838733 |
CONTROL SYSTEM FOR MULTIPLE ZONE HEATING AND COOLING
A multiple-zone air conditioning system including a central heating source and a central cooling source for supplying conditioned air to a plurality of zones includes control circuitry comprising...
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3826305 |
TEMPERATURE CONTROLLER FOR CONTROLLING BOTH HEATING AND COOLING
A temperature controller for maintaining the temperature of a process at a set point by controlling the heating input in accordance with both a proportional and reset response from the temperature...
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3797560 |
CONTROL SYSTEM FOR ENVIRONMENTAL CONDITIONING UNITS
A solid state environmental control system which approximates the temperature demand curve by sequentially activating a plurality of environmental conditioning units at a given time interval while...
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3747671 |
AIR CIRCULATION CONTROL SYSTEM
Automatic control to maintain the temperature of air within an enclosure within a predetermined temperature range and of a generally uniform temperature from floor level to ceiling level comprises...
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