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| Number | Title | Issue Date |
| 7347057 | Control of dual-heated absorption heat-transfer machines An absorption, heat-transfer system with an operationally interconnected generator, absorber, condenser, and evaporator; at least two separate heat sources for heating the generator; and a controller for controlling the heat sources. The controller, e.g., a programm... | 03/25/2008 |
| 7222500 | Method and device for absorption cooling When using systems that use the principle of absorption for the production of cold there is a great delay between the starting of the installation and the production of cold. This delay is due to the necessary time for the production of vapour. According to t... | 05/29/2007 |
| 7213408 | Multifunctional constant temperature refrigerator with thermal carriers The present invention discloses a multifunctional constant temperature refrigerator comprising a compressor (1), an evaporator (16), a condenser (23), a cabinet (37), and freezing compartments (9), wherein the refrigerator further ... | 05/08/2007 |
| 7131282 | Defrosting The present invention relates to an apparatus and method for defrosting an absorption refrigerator comprising the steps of determining a defrost start time for defrosting of the low temperature compartment and higher temperature compartment, starting the absorption ... | 11/07/2006 |
| 7127904 | Refrigerating appliance comprising a refrigerating compartment, a cold storage compartment and a freezer compartment A cooling appliance is provided with a refrigeration compartment, a cold storage compartment and a freezer compartment, which are separated from one another by partition walls and by at least one door or flap. A cooling air passage is associated with the refrigerati... | 10/31/2006 |
| 7073341 | Air conditioner An air conditioner is provided that includes an exhaust heat recovery unit for recovering exhaust heat in a heat transfer medium, a heat transfer medium passage in which the heat transfer medium outputted from the exhaust heat recovery unit flows, an auxiliary heati... | 07/11/2006 |
| 7065976 | Control logic for maintaining proper solution concentration in an absorption chiller in co-generation applications This application discloses a control logic for maintaining a proper solution concentration within an absorption chiller. Further, safeguards are added to a system control to ensure robust operation when operated in a co-generation application with a heat source such... | 06/27/2006 |
| 7062928 | Cooling apparatus and method The present invention relates to an absorption refrigerator including a cabinet having outer walls and at least one door encasing a low temperature storage compartment and a higher temperature storage compartment, said compartments being separated by a partition wal... | 06/20/2006 |
| 7050888 | Control system and method of controlling ammonium absorption refrigerators The present invention provides control systems and methods for a cooling unit. The system includes a temperature sensor that senses the temperature of a cooling fin and a circuit. The circuit may communicate with a signal from the cooling unit that indicates when co... | 05/23/2006 |
| 7047760 | Combination AC/HP-refrigerator apparatus and method A combination AC/HP-refrigerator apparatus and method includes, according to one embodiment, a common condenser duct connected to an AC/HP device with a condenser and to a refrigerator wherein the AC/HP condenser is located in the common condenser duct above the ref... | 05/23/2006 |
| 7007856 | Extended engine off passenger climate control system and method An extended engine off passenger climate control system utilizes an advanced temperature control module in combination with modifications to the conventional heating/ventilation/air conditioning (HVAC) system to provide occupants in the passenger cabin of a hybrid e... | 03/07/2006 |
| 6996988 | AutoSolar Thermal Electric Conversion (ASTEC) solar power system A thermal collection system has a first tank for storing relatively hot working fluid and a second tank for storing relatively cold working fluid. A heat exchanger is connected for receiving the relatively hot working fluid from the first tank for providing heat to ... | 02/14/2006 |
| 6983616 | Control logic for maintaining proper solution concentration in an absorption chiller in co-generation applications This application discloses a control logic for maintaining a proper solution concentration within an absorption chiller. Further, safeguards are added to a system control to ensure robust operation when operated in a co-generation application with a heat source such... | 01/10/2006 |
| 6962051 | Control of flow through a vapor generator In a Rankine cycle system wherein a vapor generator receives heat from exhaust gases, provision is made to avoid overheating of the refrigerant during ORC system shut down while at the same time preventing condensation of those gases within the vapor generator when ... | 11/08/2005 |
| 6904768 | Absorption-type air conditioner system An absorption-type air conditioner system using lithium bromide solution as absorbent is provided, which has a small volume and compact structure. The system includes upper vessel 26, lower vessel 27, cooling heat exchanger 10, self-induced air ... | 06/14/2005 |
| 6843064 | Method and apparatus for turbulent refrigerant flow to evaporator A method of reducing superheat fluctuation and improving evaporator heat transfer comprises creating turbulent flow in refrigerant supplied to the evaporator. ... | 01/18/2005 |
| 6823682 | Absorptive chiller with evaporator protection An absorption chiller having a protection system for preventing the chilled water in the evaporator tubes from freezing in the event the water flow through the tubes closes down while the machine is running. A sensor in the evaporator heat exchanger is arranged to d... | 11/30/2004 |
| 6792765 | Chilling system and method A chiller system comprises a chiller, a burner, a first variable frequency driver and pump, a second frequency drive and pump, and a feedback system. The chiller has a chilled water input and a cooling water input and the burner is coupled to the chiller. The first ... | 09/21/2004 |
| 6748752 | Apparatus and method for weak liquor flow control in aqua-ammonia absorption cycles An aqua-ammonia absorption cooling and/or heating system actively controls the flow of weak liquor from the generator to the absorber, using one or more valves operated in response to weak liquor temperature, and/or pressure and/or concentration. ... | 06/15/2004 |
| 6701726 | Method and apparatus for capacity valve calibration for snapp absorption chiller Data points are determined for an absorption chiller system which relate a position of the capacity valve to the heat input into the system. A continuous curve is determined which estimates the relationship between the position of the capacity valve and t... | 03/09/2004 |
| 6658870 | Absorption chiller control logic In an absorption chiller system, a control input for the chiller is a heat source controlled by a capacity valve, which is in turn controlled by a PI controller. The controller is controlled by a non-linear control function. During operation, a disturbanc... | 12/09/2003 |
| 6637221 | Dual setpoint control for an absorption chiller A method of controlling the capacity of an absorption chiller by regulating the heat input to a generator in response to a selected one of two system variables. The first variable involves the measured chilled water temperature leaving the system evaporat... | 10/28/2003 |
| 6637220 | Dilution cycle for absorption chiller A routine of controlling the dilution cycle of an absorption chiller to determine when to initiate a dilution cycle, continue the cycle and terminate the cycle. The concentration of solution leaving the chiller's low temperature generator is calculated an... | 10/28/2003 |
| 6595022 | Computer system having a refrigeration cycle utilizing an adsorber/desorber for purposes of compression A computer system is described having a refrigeration cycle for a logic processor each utilizes first and second refrigeration cycles, each including a respective adsorber/desorber. Each adsorber/desorber is alternatingly cooled and heated. A liquid is ad... | 07/22/2003 |
| 6584788 | Apparatus and method for improved performance of aqua-ammonia absorption cycles An aqua-ammonia absorption heating and/or cooling apparatus uses a thermostatic expansion valve (TXV) and a temperature-sensing bulb for controlling refrigerant flow to the evaporator having a bulb charge composition comprising a mixture of propane and bu... | 07/01/2003 |
| 6564562 | Generator solution outlet box for an absorption chiller An absorption apparatus includes a generator with an integrated outlet box comprising a liquid sensing chamber and a solution outlet chamber. The sensing chamber has an opening into the generator, with the opening being sized according to the liquid surfa... | 05/20/2003 |
| 6560979 | Controlling method of absorption refrigerator Prevention of the incapability of operation due to crystallization in the absorption solution. When the temperature difference (ƊT) between the temperature of the concentrated absorption solution Tr detected by the temperature sensor (22) and the tempera... | 05/13/2003 |
| 6550272 | Absorption chiller/absorption chiller-heater having safety device In an absorption chiller/absorption chiller-heater wherein a pressure rise preventing means such as a safety valve, rapture disk or breakable plate is disposed in a high temperature regenerator or in the refrigerant vapor piping from the high temperature ... | 04/22/2003 |
| 6526776 | Method and appliance for cooling A cooling method using an adsorption agent is carried out in an apparatus including at least one reactor/adsorber embodied as a vessel for receiving the adsorption agent such as zeolite, at least one evaporator vessel receiving an evaporation agent such a... | 03/04/2003 |
| 6523357 | Absorption refrigerator An absorption refrigerator includes an evaporator having an evaporating heat exchanger pipe operable to evaporate refrigerant on an outer surface thereof so as to cool liquid to be cooled running in the pipe, an absorber containing absorbent liquid for ab... | 02/25/2003 |
| 6477850 | Air conditioner The air conditioner comprises heat transfer medium temperature adjusting device 1 for adjusting the temperature of a heat transfer medium, an absorption chiller 5 having as a heat source the heat transfer medium supplied from the heat transfer medium temp... | 11/12/2002 |
| 6457326 | Purge system for absorption unit An absorption refrigeration unit having a purge system that will sense when the discharge pressure of the solution pump becomes subatmospheric and will automatically increase the speed of the pump to bring the discharge pressure up to a desired level abov... | 10/01/2002 |
| 6405558 | Refrigerant storage apparatus for absorption heating and cooling system In a two-stage absorption heating and cooling system with refrigerant storage apparatus for converting from a cooling to a heating mode of operation, provision is made to position the refrigerant storage tank in a location vertically above the condenser, ... | 06/18/2002 |
| 6401465 | Absorption chiller leak detection and location and checking hydrogen removing cells A hydrogen sensor (33) protected from water vapor by a membrane (35) indicates increases in hydrogen concentrations which are indicative of a leak in an absorption chiller (13). A helium detector (43), protected from water vapor and liquid water by a memb... | 06/11/2002 |
| 6370893 | Absorption cooling system with refrigerant management for dilution and part load operation An absorption provided with a refrigerant management method and apparatus for temporarily storing liquid refrigerant during cooling mode operation and releasing refrigerant to the evaporator sump as needed to prevent refrigerant pump cavitation during per... | 04/16/2002 |
| 6357254 | Compact absorption chiller and solution flow scheme therefor An absorption chiller includes a vertically split absorber section the upper portion of which is a high temperature absorber and the lower portion of which is a low temperature absorber. Weak solution is pumped in parallel from the absorber to both a low ... | 03/19/2002 |
| 6354095 | Operating method of absorption heat pump An operation method of an absorption heat pump is disclosed. This method includes a step for measuring a temperature of a refrigerant vapor passed through the above-described rectification process, a step for comparing the measured temperature and a previ... | 03/12/2002 |
| 6332328 | Absorption heat pump and process for operation of an absorption heat pump A process for operation of an absorption heat pump in which in a boiling apparatus a solution which contains a refrigerant is heated by a burner in order to expel the refrigerant as refrigerant vapor; the refrigerant vapor is condensed in a condenser by i... | 12/25/2001 |
| 6311504 | Absorption heat pump and method for controlling the same An absorption heat pump and controlling methods thereof for utilizing exhaust heat to obtain high- and low-temperature fluids. The absorption heat pump comprises: a regenerator 1 to which exhaust heat is supplied to evaporate and isolate a refrigerant fro... | 11/06/2001 |
| 6305182 | Absorption heating and cooling system having an improved refrigerant control apparatus A refrigerant control apparatus for use in an absorption heating and cooling system of the type which uses a refrigerant and an absorbent, and which includes a generator, a condenser, an absorber and an evaporator having an evaporator sump. The control ap... | 10/23/2001 |
