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| Number | Title | Issue Date |
| 8141623 | Automatic switching two pipe hydronic system Disclosed is an automatic switching two pipe hydronic system for conditioning a space. In one embodiment the two pipe hydronic system enables automatic switching from a first mode of operation to a second mode of operation or vice versa in a reduced span of time. Th... | 03/27/2012 |
| 7143592 | Absorption chiller-heater There is constructed a constitution including an exhaust heat fired regenerator constituting a heat source by exhaust heat from external machine generating the exhaust heat, a heat fluid flow path for making a fluid having the exhaust heat constituting the heat sour... | 12/05/2006 |
| 7131490 | Fan coil controller A fan coil controller for a hot and cold water system of a building that turns off the fan while the hot water and cold water coils are flushed. A fan coil control circuit is configured to periodically and temporarily operate a hot water flow control circuit and a c... | 11/07/2006 |
| 7040544 | System and method for warm air space heating with electrical power generation This invention provides a system and method for cogeneration of building heat and electric power and that efficiently interfaces a warm air heating system with a liquid-cooled electric power generator. The system and method utilizes an electric generator that is rat... | 05/09/2006 |
| 7028768 | Fluid heat exchange control system A method of controlling a hydronic system is provided. The hydronic system includes a plurality of fluid heat exchange units for feeding a load, and a bypass valve for bypassing the load. The method includes operating at least a first and a second fluid heat exchang... | 04/18/2006 |
| 7021553 | Space heating system with fuel cells and a connection to a public electrical network The space heating system with fuel cells (11) has a connection to a public electrical network (50). In this system a fuel (B) can be supplied to the fuel cells in gaseous form through a main gas valve (200) for the production of thermal and elec... | 04/04/2006 |
| 6991028 | Thermal reservoir for two-pipe hydronic air-conditioning system A thermal reservoir for a two-pipe hydronic air-conditioning system is disclosed. Said thermal reservoir includes a well-insulated tank for alternatively storing hot and cold water. Said thermal reservoir contains plurality of valves for directing hot water stored t... | 01/31/2006 |
| 6971585 | System and method for protecting equipment from damage due to low or rapidly changing temperatures A system and method of protecting production tooling used in semiconductor fabrication from potentially damaging low temperatures or sudden temperature drops during periods of primary power outage and low outside temperatures. The boilers and pumps at a central util... | 12/06/2005 |
| 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 |
| 6158231 | Temperature regulating system employing thermostatic switching devices to assure safe operation of the system in both hazardous and non-hazardous applications An energy control and transmission system which monitors temperature in piping systems, electronic systems and the like. Energy in the form of a heated or chilled fluid is delivered to the devices and/or regions of interest to maintain temperature conditi... | 12/12/2000 |
| 5819843 | Cogeneration system A cogeneration system includes a gas engine generator acting as private power generating equipment for generating power to be supplied to private electricity consuming equipment, and a source-side heat exchanger connected to the gas engine generator throu... | 10/13/1998 |
| 5743102 | Strategic modular secondary refrigeration A commercial refrigeration network including refrigeration system units constructed and arranged for placement in strategic proximity to corresponding product cooling zones within the shopping arena of a food store, each refrigeration unit having a conden... | 04/28/1998 |
| 5622221 | Integrated zoning circulator with priority controller An integrated zoning circulator includes a priority controller, integral with the zoning circulator, for determining the priority given to the circulator in an individual zone of a multi-zone hydronic system. The zoning circulator also includes a priority... | 04/22/1997 |
| 5607013 | Cogeneration system A cogeneration system includes a gas engine generator acting as private power generating equipment for generating power to be supplied to private electricity consuming equipment, and a source-side heat exchanger connected to the gas engine generator throu... | 03/04/1997 |
| 5540555 | Real time remote sensing pressure control system using periodically sampled remote sensors A real time remote sensing pressure control system is provided which uses periodically sampled remote sensors to generate a bias signal that modifies the base setpoint of a proportional-integral controller that controls variable speed pumps. This control ... | 07/30/1996 |
| 5289868 | Absorption chiller heater and unit-type air conditioning system An unit-type air conditioning system is provided to enable low-load operation of an absorption chiller heater, to thereby improve the load responsiveness, and to use such a chiller heater as an outdoor unit. A plurality of burners are provided in a high t... | 03/01/1994 |
| 5284204 | Hydronic thermal distribution system for space heating and cooling The apparatus of the present invention comprises a hydronic distribution system using prefabricated, flexible cable containing plastic tubing to provide liquid supply and return conduits for the hydronic system. The plastic conduits are enclosed in a foam... | 02/08/1994 |
| 5282369 | Multiple type absorption air conditioning system The capacity control range of an interior unit of a multiple type absorption air conditioning system is increased, and turning on and off of cooling/heating and switch over between the cooling and heating can be readily and safely performed. The capacity ... | 02/01/1994 |
| 5261483 | Control system for a fan coil of an air-conditioner A control system for a fan coil of an air-conditioner having a fan for heat exchange, and a coil unit through which cool or hot water circulates to cool or heat the room by heat exchange with the room air, wherein an automatic change is carried out betwee... | 11/16/1993 |
| 5138845 | Method and apparatus for controlling the flow of process fluids A method and apparatus for controlling the flow of process fluids comprising a primary loop for process fluids; a plurality of secondary loops for the process fluids; a plurality of bridges, each coupling the primary loop with a secondary loop, each bridg... | 08/18/1992 |
| 5089975 | Method and apparatus for controlling the flow of process fluids A system for cooling a flow of air at a plurality of sites comprising a process water chiller subassembly, a plurality of air cooling subassemblies, a primary loop for process water extending between the process water subassembly and the plurality of air ... | 02/18/1992 |
| 4446912 | Selected segment heating or cooling system A selected segment heating system including: means for heating a fluid; conduit means for conducting the fluid from the outlet to the return inlet of the means for heating through a plurality of areas; means, interconnected with the conduit, for moving th... | 05/08/1984 |
| 4355760 | Control unit for a multi-unit building Three or more temperature sensors are positioned at various selected locations in a building. These sensors are connected to an averaging circuit whose function is to provide an electrical signal which is functionally related to the average temperature of... | 10/26/1982 |
| 4192455 | Apparatus for controlling the supply temperature in a central heating installation The invention relates to thermostatic apparatus for controlling the heating fluid supply temperature in a central heating installation having at least two radiators in different rooms. With each room having a thermostat for controlling the radiators there... | 03/11/1980 |
| 4150788 | Remote-controlled central air-conditioning system A remote-controlled forced-circulation central air-conditioning system comprising a central heat-exchanger unit and a plurality of terminal air-conditioning units which are connected to the central heat-exchanger unit through terminal valves, respectively... | 04/24/1979 |
