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| Number | Title | Issue Date |
| 8181472 | Electronic refrigeration control system An electronic microprocessor-based control system for a refrigerator is provided having refrigeration components including a compressor, a condenser, a condenser fan, an evaporator, a variable speed evaporator fan. Multiple temperature sensors are provided to commun... | 05/22/2012 |
| 8136365 | Cooling apparatus having a variable speed compressor with speed limited on the basis of a sensed performance parameter A cooling apparatus such as a refrigerator includes a refrigeration cycle including a compressor driven by an electric motor, a condenser, a throttle valve and an evaporator, a first physical amount detector capable of detecting a physical quantity representing a te... | 03/20/2012 |
| 8087259 | Control method and system The invention relates to a control method and system comprising an electronic control unit (11) controlling the electric current power supply from an electric power source to a motor-compressor arrangement (12, 13); the electronic control unit comprise... | 01/03/2012 |
| 8011198 | Method of preheating inverter-driven compressor and device therefor To reduce a leakage current when a motor for driving a compressor is energized, with the compressor unoperated. Setting the carrier frequency of an inverter at a value lower than that used during normal operation to cause phase interruption electrification of the mo... | 09/06/2011 |
| 7966839 | Method and system for controlling a compressor for an HVAC module A system for controlling a heating and cooling system for use on a machine includes a condenser, an evaporator assembly, an electric motor driven compressor, and a master controller operable to determine and regulate an operational speed of the compressor. The maste... | 06/28/2011 |
| 7946123 | System for compressor capacity modulation A system is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an air conditioning or cooling mode, the compressor has a first output ca... | 05/24/2011 |
| 7930895 | Brushless direct current motor, compressor and air conditioner having the same A brushless direct current motor, includes a rotor which comprises a permanent magnet, a stator which comprises coils associated with a plurality of phases which form an electrical field for generating a torque by interaction with a magnetic field which is generated... | 04/26/2011 |
| 7836716 | Refrigerant cycle device and control system for vehicle A refrigerant cycle device includes a compressor driven by a vehicle engine for drawing and compressing gas refrigerant from an evaporator, a variable displacement mechanism which varies a discharge capacity of the compressor based on a control value from an exterio... | 11/23/2010 |
| 7775058 | Cooler and refrigerator In controlled cooling operation, data on the controlled cooling operation characteristics is read out from a memory and compared with a drop degree of an inside temperature actually measured by an inside temperature sensor 46, and a cooling device is operated... | 08/17/2010 |
| 7739882 | Variable speed control A variable speed control system is provided for use with a heat pump heating/cooling system having a variable speed compressor. The control system includes a remote transceiver, a second transceiver to communicate with the first transceiver, and an AC power module t... | 06/22/2010 |
| 7730732 | Refrigerating storage cabinet A storing section stores data of a pull down cooling characteristic indicative of a time-varying mode of reduction in a target temperature drop. For example, when this is a linear function line, a target internal temperature drop degree takes a constant value, irres... | 06/08/2010 |
| 7716937 | Electronic refrigeration control system including a variable speed compressor A refrigerator has a refrigeration system including a variable speed compressor, a condenser, a condenser fan, an evaporator, a variable speed evaporator fan. The refrigerator further includes multiple temperature sensors that communicate with an electronic micropro... | 05/18/2010 |
| 7628028 | System and method for compressor capacity modulation A system and method is provided to control and operate a compressor to have two or more discrete output capacities in response to an outdoor temperature measurement. During operation of the compressor in an air conditioning or cooling mode, the compressor has a firs... | 12/08/2009 |
| 7555912 | System for precharging a DC link in a variable speed drive A variable speed drive with a converter that is controllable to precharge a DC link is provided. The variable speed drive also includes an inverter. The converter converts a fixed line frequency, fixed line voltage AC power from an AC power source into DC power. The... | 07/07/2009 |
| 7481069 | Controlling a voltage-to-frequency ratio for a variable speed drive in refrigerant systems A refrigerant system is provided with at least one variable frequency drive. In the past, the variable frequency drives were operable such that the voltage-to-frequency ratio remained constant regardless of operation. The present invention realizes that variations i... | 01/27/2009 |
| 7451610 | Vehicle air conditioning system A vehicle air conditioning system equipped with a refrigerant circuit comprising an electrically operated compressor is intended to enable simplification of data communication between the inside and outside of a passenger compartment and to enable accurate air condi... | 11/18/2008 |
| 7442012 | Speed control for compressors Improvements to a compressor which consists in that, as soon as the measured outlet temperature (TO) reaches a certain hysteresis upper temperature limit (HMAX), the actual rotational speed of the compressor element is either lowered with a speed jump (DS) when the ... | 10/28/2008 |
| 7437882 | Apparatus for driving a compressor and a refrigerating air conditioner An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at vari... | 10/21/2008 |
| 7434416 | Air-conditioning system An air-conditioning system includes a refrigeration cycle and a control unit. The refrigeration cycle includes an electric compressor in which a compression mechanism for drawing a refrigerant therein for compression is integrated with an electric motor for driving ... | 10/14/2008 |
| 7421853 | Enhanced manual start/stop sequencing controls for a stream turbine powered chiller unit A control system and method for interactive startup and shutdown of a steam turbine driven chiller unit is provided. The chiller unit includes an integrated central control panel to control operation of both the steam turbine system and the refrigerant system. The c... | 09/09/2008 |
| 7421854 | Automatic start/stop sequencing controls for a steam turbine powered chiller unit A control system and method are provided for the automatic startup and shutdown of a steam turbine driven chiller unit. The chiller unit includes an integrated central control panel to control operation of both the steam turbine system and the refrigerant system. Th... | 09/09/2008 |
| 7398653 | Air conditioner for vehicle capable of preventing inverter overheating An inverter 6 that drives an electric motor 4 of the electric compressor 3 operates in a protection-against-overheat mode, in which the electric motor is driven at a rotational speed for protection against heat different from a rotational speed ... | 07/15/2008 |
| 7389649 | Cooling system with variable duty cycle capacity control A control system for a cooling system includes a first sensor for sensing a property indicative of demand for cooling and a controller coupled to the sensor. The controller produces the variable duty cycle control signal in response to the property and causes the co... | 06/24/2008 |
| 7370487 | Refrigerating cycle device capable of ensuring oil return Whether or not a flow rate of a circulating refrigerant is higher than a predetermined threshold value is judged and when the flow rate is higher than the predetermined threshold value, the discharge flow rate of a compressor 11 is controlled in accordance wi... | 05/13/2008 |
| 7349824 | Method and system for evaluating the efficiency of an air conditioning apparatus The applicant describes a system and methods of calculating the overall operating efficiency of an air conditioning chiller that evaluates efficiency of the component parts of the chiller and generates an overall efficiency based on these component efficiency values... | 03/25/2008 |
| 7340910 | System and method of increasing efficiency of heat pumps The system and method for increasing efficiency of heat pumps employs temperature sensors to measure the indoor refrigerant coil (indoor heat exchanger) and supply duct air temperature in a heat pump system to vary the indoor air flow rate based on the amount of hea... | 03/11/2008 |
| 7337624 | Refrigeration system and method for beverage dispenser A method of regulating the refrigerant temperature for a beverage machine, including a refrigeration system for producing a frozen beverage, operating at least one compressor at a speed to flow the refrigerant through the refrigeration system of the beverage machine... | 03/04/2008 |
| 7331383 | Shore power system including a HVAC system A shore power HVAC system for a vehicle is provided. The vehicle has a vehicular HVAC system with an engine compressor, a condenser, and an expansion valve and an evaporator coupled to each other in series by a plurality of conduits. The shore power HVAC system incl... | 02/19/2008 |
| 7312545 | Controller for electric power steering and electric power steering system An electric power steering drive system provided with a motor with its torque pulsation reduced, and a controller characterized by excellent manufacturability. The stator core of a motor is composed of an annular back core and a plurality of teeth created sep... | 12/25/2007 |
| 7293414 | High performance method for throttling of closed gas turbine cycles A closed cycle recuperator microturbine and an open cycle heat generating system for supplying heat for driving the turbine includes a pair of valves fluidly connected to the compressor inlet and compressor outlet for bleeding air therefrom when the microturbine eng... | 11/13/2007 |
| 7281910 | Motor driven compressor A motor driven compressor having a motor for driving a compression mechanism includes a connecting portion for connecting between an external terminal for supplying electricity to the motor and a wire end portion of a stator of the motor. The connecting portion is l... | 10/16/2007 |
| 7275533 | Pressure controller for a mechanical draft system Systems and method for controlling the flow of air through a mechanical draft system are disclosed herein. A pressure controller for controlling air pressure comprises an appliance controller configured to control the operation of a plurality of appliances, an intak... | 10/02/2007 |
| 7272943 | Control method for multiple heat pump Disclosed herein is a control method for a multiple heat pump. In the control method, when one of multiple indoor units operates in the heating mode and the other indoor units shut down, electronic expansion valves of the shutdown indoor units are controlled to have... | 09/25/2007 |
| 7271565 | Apparatus for controlling speed of fan motor of air-conditioner An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed con... | 09/18/2007 |
| 7266961 | Mobile refrigeration system and control A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evapor... | 09/11/2007 |
| 7266962 | Battery supplemented refrigerator and method for using same A refrigerator contains a battery pack for providing a DC current to drive a refrigeration system and alternatively is connectable to an AC power source for driving the refrigeration system from the AC power source. The DC battery pack is utilized during peak loads ... | 09/11/2007 |
| 7260946 | Mobile refrigeration system and control A mobile refrigeration system that includes an engine that is operable at a first speed greater than zero and a second speed greater than zero. A compressor is operable in response to the engine at a first speed and a second speed. The system also includes an evapor... | 08/28/2007 |
| 7260949 | Compressor variable dryer system A dryer assembly for drying compressed fluid received from a fluid compressor. The dryer assembly comprises a compressed fluid circuit and a refrigeration circuit associated with the compressed fluid circuit and configured to reduce the temperature of the compressed... | 08/28/2007 |
| 7259469 | Vehicle auxiliary power unit, assembly, and related methods A truck includes an auxiliary power unit having components specifically selected such that they form a stand-alone unit that can fit within an auxiliary compartment of a vehicle and deliver heating, cooling, and additional electric power to the vehicle. Included is ... | 08/21/2007 |
| 7240502 | Method for controlling operation of air-conditioner A method for controlling operations of an air-conditioner includes: a step in which when an operation load of an air-conditioner increases, if an outputted compressing capacity of the air-conditioner is smaller than a compressing capacity corresponding to the operat... | 07/10/2007 |
