| EMERSON CLIMATE TECHNOLOGIES, INC. Patent applications |
| Patent application number | Title | Published |
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| 20120120534 | Three-Phase Detection Module - A method includes receiving N power signals, each having a different one of N phases, over N power supply lines, where N is an integer greater than two. The method further includes selectively activating a first switch to allow a first current to flow from a first one of the N power supply lines to a second one of the N power supply lines. The method includes generating a signal based on the first current, and selectively generating a phase failure signal when the signal is less than a predetermined threshold. | 05-17-2012 |
| 20120107163 | COMPRESSOR SEAL ASSEMBLY - A compressor may include a shell, first and second scroll members, and a seal assembly. The shell defines a first and second pressure regions. The first scroll member may include a first end plate defining a chamber. The seal assembly may surround the discharge passage and fluidly separate the first and second pressure regions from each other. The seal assembly may include first and second sealing members. The first sealing member may prevent communication between the chamber and the second pressure region when a first fluid pressure within the second pressure region is higher than a second fluid pressure within the chamber. The first sealing member may define a leakage path when the first fluid pressure is lower than the second fluid pressure. The second sealing member may fluidly separate the chamber and the second pressure region when the first fluid pressure is lower than the second fluid pressure. | 05-03-2012 |
| 20120075754 | SYSTEMS AND METHODS FOR PROTECTING THREE-PHASE MOTORS - A system for protecting a three-phase electric motor of a compressor, the motor receiving first, second, and third phases from a three-phase power supply, the system including a single-phase line break protector, a first current sensor, and a control module. The single-phase line break protector disconnects the motor from the first phase in response to a temperature being greater than a predetermined temperature threshold. The first current sensor measures a current through the single-phase line break protector. The control module determines a current value based on the measured current, and disconnects the motor from the second and third phases in response to the current value being less than or equal to a predetermined threshold. | 03-29-2012 |
| 20120006048 | COMPRESSOR WITH VAPOR INJECTION SYSTEM - A heat pump system is provided and may include a compressor, a first heat exchanger in fluid communication with the compressor, a second heat exchanger in fluid communication with the first heat exchanger and the compressor, and a flash tank fluidly coupled to the first heat exchanger and the second heat exchanger. A first conduit may extend between the first heat exchanger and the second heat exchanger. A valve associated with the first conduit may operate in an open state to permit flow along the first conduit between the first heat exchanger and the second heat exchanger to at least partially bypass the flash tank and may operate in a closed state to prevent flow along the first conduit between the first heat exchanger and the second heat exchanger to direct flow into the flash tank. | 01-12-2012 |
| 20110264409 | COMPRESSOR SENSOR MODULE - A sensor module for a compressor, having an electric motor operating at a first voltage, the sensor module operating at a second voltage, is provided. The sensor module includes a plurality of inputs connected to a plurality of sensors that generate a plurality of operating signals associated with operating conditions of the compressor. A processor is connected to the plurality of inputs and records multiple operating condition measurements from the plurality of operating signals. A communication port is connected to the processor for communicating said operating condition measurements to a control module that controls the compressor. The processor is disposed within an electrical enclosure of the compressor, the electrical enclosure being configured to house electrical terminals for connecting a power supply to the electric motor. The second voltage is less than said first voltage. | 10-27-2011 |
| 20110229360 | POWDER METAL SCROLL HUB JOINT - A scroll component including a spiral scroll wrap, a baseplate having a first major surface coupled to the scroll wrap and a second opposing major surface comprising a protruding pilot extending a distance from the baseplate, and a hub fastened to the baseplate adjacent to the protruding pilot. A method of forming a scroll compressor element is also provided. | 09-22-2011 |
| 20110150688 | SCROLL COMPRESSOR WITH DISCHARGE VALVE - A scroll compressor is provided and may include an orbiting scroll member having an orbiting end plate and an orbiting spiral wrap extending from the orbiting end plate. The scroll compressor may also include a non-orbiting scroll member having a non-orbiting end plate and a non-orbiting spiral wrap extending from the non-orbiting end plate and intermeshed with the orbiting spiral wrap. The scroll compressor may further include a drive member for causing the orbiting scroll member to orbit relative to the non-orbiting scroll member and a discharge slot formed by one of the orbiting scroll member and the non-orbiting scroll member. A discharge valve may be rotatable with the drive member and may operate between a closed state preventing fluid communication between the pockets and the discharge slot and an open state permitting fluid communication between the pockets and the discharge slot. | 06-23-2011 |
| 20110144944 | COMPRESSOR DIAGNOSTIC AND PROTECTION SYSTEM AND METHOD - A method is provided and may include generating a high-side signal indicative of an operating condition of a high-pressure side of a refrigeration circuit and generating a low-side signal indicative of an operating condition of a low-pressure side of the refrigeration circuit. The method may further include processing by a processor the high-side signal and the low-side signal to determine a non-measured system condition and determining by the processor an efficiency of the refrigeration circuit based on the non-measured system condition. | 06-16-2011 |
| 20110139794 | FLASH TANK DESIGN AND CONTROL FOR HEAT PUMPS - A flash tank is provided and may include a shell having an inner volume. A first port may be in fluid communication with the inner volume and may be positioned relative to a surface of the inner volume such that fluid flows therebetween in a direction that is substantially tangent to the surface. | 06-16-2011 |
| 20110129354 | Vibration Protection In A Variable Speed Compressor - Vibration protection in a compressor system with a variable speed compressor may include operating a variable speed compressor of a compressor system at a first frequency, measuring a vibration of the compressor system at the first frequency, determining whether the vibration exceeds a maximum vibration value, and operating the variable speed compressor at an average frequency equivalent to the first frequency, when the vibration exceeds the maximum vibration value, by identifying an allowed upper frequency and an allowed lower frequency, calculating an upper operating time and a lower operating time, and operating the variable speed compressor at the allowed upper frequency for the upper operating time and the allowed lower frequency for the lower operating time. | 06-02-2011 |
| 20110107778 | Parallel Condensing Unit Control System And Method - A method comprises monitoring an operating parameter of a refrigeration system that includes a first condensing unit having a first control module and a second condensing unit having a second control module, the first and second condensing units each having at least one compressor. The method also includes controlling, with the first control module, the at least one compressor of the first condensing unit based on the monitoring. The method also includes controlling, with the first control module, the at least one compressor of the second condensing unit based on the monitoring. The first control module controls the at least one compressor of the second condensing unit by communicating with the second control module via a communication link. | 05-12-2011 |
| 20110107775 | Parallel Condensing Unit Control System And Method - A system comprises a condenser for a refrigeration system and a control module. The condenser has a plurality of variable speed condenser fans. The control module controls the plurality of variable speed condenser fans. The control module increases condenser fan operation by activating a deactivated variable speed condenser fan at a first fan speed when at least one variable speed condenser fan of the plurality is deactivated and by increasing a fan speed of an activated variable speed condenser fan to a second fan speed when each variable speed condenser fan of the plurality is activated and operating at the first fan speed. The second fan speed is faster than the first fan speed. | 05-12-2011 |
| 20110103988 | COMPRESSOR HAVING CAPACITY MODULATION SYSTEM - A compressor may include a housing and first and second scroll members supported within the housing, each having an end plate with a spiral wrap extending therefrom and meshingly engaged with the other to form a series of compression pockets operating at an intermediate fluid pressure between a suction pressure and a discharge pressure. A first passage in communication with one of the compression pockets extends from a first side of the first end plate to a second side of the first end plate generally opposite the first side. A modulation plate overlies the second side of the first scroll member for radial displacement between first and second positions. The modulation plate isolates the first passage from communication with a suction pressure region of the compressor when in the first position and provides communication between the first passage and the suction pressure region when in the second position. | 05-05-2011 |
| 20110091342 | THERMALLY COMPENSATED SCROLL MACHINE - A compressor may include first and second scroll members and a compensation member. The first scroll member may include a first end plate and a first spiral wrap extending therefrom. The second scroll member may include a second end plate and a second spiral wrap. The second end plate may be positioned proximate to a distal end of the first spiral wrap. The first end plate may be positioned proximate to a distal end of the second spiral wrap. The compensation member may engage the first scroll member and having a first reaction to a temperature change causing the first scroll member to maintain a sealed relationship between the first end plate and the distal end of the second spiral wrap. | 04-21-2011 |
| 20110070100 | CRANKCASE HEATER SYSTEMS AND METHODS FOR VARIABLE SPEED COMPRESSORS - A system includes a compressor having a shell housing a compression mechanism driven by an electric motor in an on state and not driven by the electric motor in an off state. The system also includes a variable frequency drive that drives the electric motor in the on state by varying a frequency of a voltage delivered to the electric motor and that supplies electric current to a stator of the electric motor in the off state to heat the compressor. | 03-24-2011 |
| 20110052410 | POWDER METAL SCROLLS - Scrolls made from one or more near-net shaped powder metal processes either wholly or fabricated together from sections. Both “conventional” press and sinter methods and metal injection molding methods will be described. | 03-03-2011 |
| 20110033328 | COMPRESSOR HAVING CAPACITY MODULATION SYSTEM - A compressor includes first and second scroll members, a structure supporting the second scroll member, and a first piston. The first scroll member includes a first end plate and a first spiral wrap. The second scroll member includes a second end plate and a second spiral wrap engaged with the first spiral wrap to form compression pockets. The second end plate includes a first aperture in communication with a first compression pocket. The structure includes a first recess and first and second passages. The first piston is axially displaceable between first and second positions within the first recess. The first piston isolates the first passage from communication with the second passage when in the first and second positions, prevents communication between the first aperture and the first passage when in the first position, and provides communication between the first aperture and the first passage when in the second position. | 02-10-2011 |
| 20110032738 | SYSTEM AND METHOD FOR POWER FACTOR CORRECTION - A first rectifier diode is electrically connected between a first input terminal where an alternating current (AC) power is received and a first output terminal where a direct current (DC) power is output. A second rectifier diode is electrically connected between the first input terminal and a second output terminal. The first and second rectifier diodes rectify first and second portions of the AC power into the DC power, respectively. When switching of a plurality of power factor correction (PFC) switches is enabled, the plurality of PFC switches increases a voltage of the DC power to greater than a peak voltage of the AC power. An inductor is electrically connected between a second input terminal and two of the plurality of PFC switches. When the switching is disabled, first and second bypass diodes provide a current path past the plurality of PFC switches and the inductor. | 02-10-2011 |
| 20110031943 | SYSTEM AND METHOD FOR REJECTING DC CURRENT IN POWER FACTOR CORRECTION SYSTEMS - A power factor correction (PFC) system includes a direct current (DC) module, an error control module, an offset module, and a duty cycle control module. The DC module determines an average current value based on a plurality of current values over at least one cycle of an input alternating current (AC) line signal of the PFC system. The error control module generates an error signal based on the average current value. The offset module offsets a desired instantaneous current based on the error signal. The duty cycle control module controls at least one duty cycle of switches of the PFC system based on the offset desired instantaneous current. | 02-10-2011 |
| 20110031942 | SYSTEM AND METHOD FOR REDUCING LINE CURRENT DISTORTION - A power factor correction (PFC) system includes an adjustment module, a compensation module, and a duty cycle control module. The adjustment module generates N time advances based on N predetermined time advances and (N−1) time advance adjustments, wherein N is an integer greater than zero. The compensation module generates N compensated versions of an input alternating current (AC) line signal by predicting ahead of the input AC line signal using a gradient of a sinusoidal reference signal and the N time advances, respectively, wherein the sinusoidal reference signal is synchronized with the input AC line signal in phase and frequency. The duty cycle control module generates PFC duty cycles based on the N compensated versions of the input AC line signal. | 02-10-2011 |
| 20110031941 | SYSTEM AND METHOD FOR CURRENT BALANCING - A power factor correction (PFC) system includes a comparison module, an adjustment module, a compensation module, and a duty cycle control module. The comparison module measures N currents having different phases, and generates (N−1) comparisons based on the N measured currents, wherein N is an integer greater than one. The adjustment module determines (N−1) time advance adjustments based on the (N−1) comparisons, respectively. The compensation module generates N compensated versions of an input alternating current (AC) line signal based on the input AC line signal, a sinusoidal reference signal, and the (N−1) time advance adjustments, wherein the sinusoidal reference signal is synchronized to the input AC line signal in phase and frequency. The duty cycle control module controls PFC switching based on the N compensated versions of the input AC line signal. | 02-10-2011 |
| 20110031940 | SYSTEM AND METHOD FOR POWER FACTOR CORRECTION FREQUENCY TRACKING AND REFERENCE GENERATION - A power factor correction (PFC) system includes a period determination module, a frequency generation module, an angle generation module, a signal generation module, and an angle correction module. The period determination module determines a period of an input alternating current (AC) line signal based on a time between rising edges of the input AC line signal. The frequency generation module generates a frequency based on the period. The angle generation module generates an angle based on the frequency. The signal generation module generates a sinusoidal reference signal based on the frequency and an adjusted angle. The angle correction module generates the adjusted angle based on the angle and based on a comparison of a falling edge of the sinusoidal reference signal, the period, and a rising edge of the input AC line signal. | 02-10-2011 |
| 20110031920 | CONTROLLER AND METHOD FOR ESTIMATING, MANAGING, AND DIAGNOSING MOTOR PARAMETERS - A motor control system includes a control module, a switching module, and a filtering module. The control module determines output voltages for operating a motor based on a torque demand. The switching module generates switching signals for an inverter that drives the motor. The switching module generates the switching signals based on the output voltages. The switching module generates an out-of-volts (OOV) signal according to a comparison based on the output voltages, a maximum duty cycle, and a voltage of a direct current (DC) bus that provides power to the inverter. The filtering module generates an OOV amount by filtering the OOV signal. The control module selectively limits the torque demand based on the OOV amount. | 02-10-2011 |
| 20110031919 | CONTROLLER AND METHOD FOR MINIMIZING PHASE ADVANCE CURRENT - A current control module generates a voltage request based on a d-axis current (Idr) demand. A switching control module controls a motor based on the voltage request and generates an out-of-volts (OOV) signal based on a comparison of the voltage request and an available voltage. An Idr injection module generates the Idr demand based on a direct current (DC) bus voltage, a rotational speed, and a demanded torque and selectively applies a first adjustment to the Idr demand. The Idr injection module identifies whether an improvement resulted from the first adjustment, wherein the improvement is identified based on at least one of (i) a measured current of the motor and (ii) the OOV signal. The Idr injection module selectively applies a second adjustment to the Idr demand based on whether the improvement is identified. | 02-10-2011 |
| 20110031914 | CONTROLLER AND METHOD FOR TRANSITIONING BETWEEN CONTROL ANGLES - A system includes a pulse-width modulation (PWM) module, a subtraction module, an error reducing module, and a summing module. The PWM module controls switching of an inverter that powers a motor. The PWM module controls the switching based on a first angle in a first mode and a second angle in a second mode. The subtraction module determines a difference between the first and second angles. The error reducing module (i) stores the difference when a transition from the first mode to the second mode is commanded and (ii) decreases a magnitude of the stored difference to zero. The summing module calculates a sum of the stored difference and the second angle. The PWM module controls the switching based on the sum in the second mode. | 02-10-2011 |
| 20110031911 | POWER FACTOR CORRECTION WITH VARIABLE BUS VOLTAGE - A controller includes a voltage determination module, a bus voltage command module, and a power factor correction (PFC) control module. The voltage determination module determines a desired direct current (DC) bus voltage for a DC bus electrically connected between a PFC module and an inverter power module that drives a compressor motor. The voltage determination module determines the desired DC bus voltage based on at least one of torque of the compressor motor, speed of the compressor motor, output power of the inverter power module, and drive input power. The bus voltage command module determines a commanded bus voltage based on the desired DC bus voltage. The PFC control module controls the PFC module to create a voltage on the DC bus that is based on the commanded bus voltage. | 02-10-2011 |
| 20100229386 | POWDER METAL SCROLLS AND SINTER-BRAZING METHODS FOR MAKING THE SAME - Methods of forming scroll compressor components are provided. The methods include forming at least one component of a scroll member from a powder metallurgy technique and joining the component with another distinct component via a sinter-brazing process. For example, a baseplate having a spiral scroll involute is joined to a hub via a joint interface having brazing material to form a braze joint with superior quality. At least one component is formed from a powder metal material including carbon and at least one species that reacts with or binds carbon to prevent migration during brazing of the sinter-brazing heat process. Optionally, during the powder metallurgy process, an alloy with a lower concentration of carbon is selected, which may be incorporated into a crystal structure with the species that prevents carbon migration. | 09-16-2010 |
| 20100111709 | COMPRESSOR PROTECTION AND DIAGNOSTIC SYSTEM - A compressor includes at least one current sensor and processing circuitry in communication with the at least one current sensor. The processing circuitry declares a locked rotor condition when current drawn by the compressor is at least forty (40) percent of peak locked rotor current. | 05-06-2010 |
| 20100101250 | COMPRESSOR DIAGNOSTIC SYSTEM - A system is provided and may include logic circuitry in communication with an intelligent device. The logic circuitry may process a refrigeration system operating parameter as a function of time and at least one of the logic circuitry and the intelligent device may diagnose a refrigeration system status based on the processing. The intelligent device may output the diagnosis. | 04-29-2010 |
| 20090241592 | COMPRESSOR ASSEMBLY HAVING ELECTRONICS COOLING SYSTEM AND METHOD - A refrigeration system having a compressor, a condenser, an evaporator, an accumulator, and electronics for controlling the compressor. The accumulator collects gaseous and liquid refrigerant passing from the evaporator to the compressor. The electronics are mounted to the accumulator to transfer heat from the electronics to the refrigerant located within the accumulator to cool the electronics. | 10-01-2009 |
| 20090200076 | Compressor Having Wire Retainer - A compressor comprising a shell, a compression mechanism disposed within the shell, a drive shaft for operating the compression mechanism, and a motor for driving the drive shaft. A terminal is secured to the shell for delivering electric current to at least one of the compression mechanism and the motor. A terminal block is engaged with the terminal, and a wire carries the electric current from the terminal and the terminal block. A wire retainer located relative to the compression mechanism supports the wire in a predetermined orientation within the shell. | 08-13-2009 |
| 20090128972 | THREE-PHASE DETECTION MODULE - An apparatus includes a first optocoupler and a control module. The first optocoupler selectively allows a first current to flow from a first one of a first pair of N power supply lines to a second one of the first pair. N is an integer greater than two. The N power supply lines each provide a phase signal. The control module controls the first optocoupler and determines an occurrence of a phase failure of the phase signals based on a first signal, which is based on the first current. | 05-21-2009 |
| 20090125257 | COMPRESSOR SENSOR MODULE - A sensor module for a compressor, having an electric motor operating at a first voltage, the sensor module operating at a second voltage, is provided. The sensor module includes a plurality of inputs connected to a plurality of sensors that generate a plurality of operating signals associated with operating conditions of the compressor. A processor is connected to the plurality of inputs and records multiple operating condition measurements from the plurality of operating signals. A communication port is connected to the processor for communicating said operating condition measurements to a control module that controls the compressor. The processor is disposed within an electrical enclosure of the compressor, the electrical enclosure being configured to house electrical terminals for connecting a power supply to the electric motor. The second voltage is less than said first voltage. | 05-14-2009 |
| 20090119036 | COMPRESSOR SENSOR MODULE - A sensor module for a compressor having an electric motor connected to a power supply and a processor disposed within an electrical enclosure of the compressor is provided, with the electrical enclosure being configured to house electrical terminals for connecting the power supply to the electric motor. The sensor module includes a first input connected to a voltage sensor that generates a voltage signal corresponding to a voltage of the power supply and a second input connected to a current sensor that generates a current signal corresponding to a current of the power supply. The processor is connected to the first and second inputs. The processor may calculate a power factor of the compressor, detect an unexpected variation in the power supply, and/or detect a mechanical malfunction of the compressor based on the voltage measurements and the current measurements. | 05-07-2009 |
| 20090110581 | Scroll Compressor For Carbon Dioxide Refrigerant - A scroll machine is provided with wear resistant features to provide the scroll machine with improved operation when processing CO | 04-30-2009 |
| 20090095002 | SYSTEM AND METHOD FOR CALCULATING PARAMETERS FOR A REFRIGERATION SYSTEM WITH A VARIABLE SPEED COMPRESSOR - A system and method for calculating parameters for a refrigeration system having a variable speed compressor is provided. A compressor is connected to a condenser and an evaporator. An evaporator sensor outputs an evaporator signal corresponding to at least one of an evaporator pressure and an evaporator temperature. An inverter drive modulates electric power delivered to the compressor to modulate a speed of the compressor. The control module is connected to the inverter drive and receives the evaporator signal, monitors electrical power data and compressor speed data from said inverter drive, and calculates at least one of a condenser temperature and a condenser pressure based on the evaporator signal, the electrical power data, and the compressor speed data. | 04-16-2009 |
| 20090094998 | SYSTEM AND METHOD FOR EVALUATING PARAMETERS FOR A REFRIGERATION SYSTEM WITH A VARIABLE SPEED COMPRESSOR - A system and method for evaluating parameters for a refrigeration system having a variable speed compressor is provided. A compressor is connected to a condenser and an evaporator. A condenser sensor and an evaporator sensor are provided. An inverter drive modulates a frequency of electric power delivered to the compressor to modulate a speed of the compressor. A monitor module receives compressor power data and compressor speed data from the inverter drive, determines a measured condenser temperature based on the condenser signal, determines a measured evaporator temperature based on the evaporator signal, calculates a first derived condenser temperature based on the compressor power data and the compressor speed data, calculates a second derived condenser temperature based on the measured evaporator temperature, the compressor power data and the compressor speed data, and compares the measured condenser temperature with the first and second derived condenser temperatures to determine whether any of the measured condenser temperature and the first and second derived condenser temperatures are inaccurate. | 04-16-2009 |
| 20090094997 | SYSTEM AND METHOD FOR CALIBRATING PARAMETERS FOR A REFRIGERATION SYSTEM WITH A VARIABLE SPEED COMPRESSOR - A system and method for calibrating parameters for a refrigeration system having a variable speed compressor is provided. A compressor is connected to a condenser and an evaporator. A condenser sensor outputs a condenser signal corresponding to at least one of a sensed condenser pressure and a sensed condenser temperature. An inverter drive modulates a frequency of electric power delivered to the compressor to modulate a speed of the compressor. A control module is connected to the inverter drive and determines a measured condenser temperature based on the condenser signal, monitors electric power data and compressor speed data from the inverter drive, calculates a derived condenser temperature based on the electric power data, the compressor speed data, and compressor map data for the compressor, compares the measured condenser temperature with the derived condenser temperature, and updates the compressor map data based on the comparison. | 04-16-2009 |
| 20090093911 | Vibration Protection In A Variable Speed Compressor - Vibration protection in a compressor system with a variable speed compressor may include operating a variable speed compressor at a plurality of frequencies, measuring a plurality of vibration values associated with the plurality of frequencies, determining a frequency characteristic of the compressor system based on the plurality of vibration values, and identifying prohibited compressor frequencies based on the frequency characteristic. | 04-09-2009 |
| 20090092502 | COMPRESSOR HAVING A POWER FACTOR CORRECTION SYSTEM AND METHOD - A power factor correction (PFC) device may be connected with a power source and a compressor. A control module may receive a measured operating parameter of the compressor, compare the measured operating parameter with a predetermined threshold, and control a switch to selectively bypass the PFC device based on the measured operating parameter of the compressor. | 04-09-2009 |
| 20090092501 | COMPRESSOR PROTECTION SYSTEM AND METHOD - A system and method for protecting a variable speed compressor may include an inverter drive that modulates a frequency of electric power delivered to the compressor to modulate a speed of the compressor. The inverter drive may be cooled by refrigerant and include a temperature sensor that outputs an inverter temperature signal corresponding to an inverter temperature. A control module may receives the inverter temperature signal, compare the inverter temperature with a predetermined threshold, and reduce a compressor operating speed range when the inverter temperature is greater than the predetermined threshold. | 04-09-2009 |
| 20090090118 | VARIABLE SPEED COMPRESSOR PROTECTION SYSTEM AND METHOD - A system and method for a compressor may include an inverter drive connected to the compressor that receives electric power and modulates a speed of the compressor by modulating a frequency of the electric power. A control module connected to the inverter drive monitors compressor power data and compressor speed data from the inverter drive, and calculates a saturated condenser temperature of a refrigeration system associated with the compressor based on the compressor power data and the compressor speed data. | 04-09-2009 |
| 20090090117 | SYSTEM AND METHOD FOR MONITORING OVERHEAT OF A COMPRESSOR - A system and method for monitoring an overheat condition of a compressor is provided. A compressor connected to an evaporator. A suction sensor outputs a suction signal corresponding to a temperature of refrigerant entering the compressor. A control module is connected to the evaporator sensor and the suction sensor and determines an evaporator temperature, calculates a suction superheat temperature based on the evaporator temperature and the suction signal, and monitors an overheat condition of the compressor by comparing the suction superheat with a predetermined suction superheat threshold. | 04-09-2009 |
| 20090090113 | COMPRESSOR ASSEMBLY HAVING ELECTRONICS COOLING SYSTEM AND METHOD - A system, compressor, and method that cools an electronics module with a low-pressure refrigerant. The system, compressor, and method utilize a temperature sensor that detects a temperature of the low pressure refrigerant and communicates with the electronics module. Based on the temperature detected by the temperature sensor, the electronics module controls a liquid dry out point of the refrigerant that is used to cool the electronics module. | 04-09-2009 |
| 20090071175 | REFRIGERATION MONITORING SYSTEM AND METHOD - A system is provided and may include a compressor having a motor and a refrigeration circuit including an evaporator and a condenser fluidly coupled to the compressor. The system may further include a first sensor producing a signal indicative of one of current and power drawn by the motor, a second sensor producing a signal indicative of a saturated condensing temperature, and a third sensor producing a signal indicative of a liquid-line temperature. Processing circuitry may processes the current or power signal to determine a derived condenser temperature and may compare the derived condenser temperature to the saturated condensing temperature received from the second sensor to determine a subcooling associated with a refrigerant charge level of the refrigeration circuit. | 03-19-2009 |
| 20090060749 | Molded Plug For A Compressor - A plug assembly for a compressor having a shell, a terminal body on the shell, and a conductor pin extending through the terminal body, wherein a connector body of the plug assembly includes a plurality of electrical receptacles for electrical communication with the conductor pin at least partially disposed within a fence disposed around the terminal body. The plug assembly may be formed of a thermoplastic or thermoset material having a tensile modulus between 9500 MPa and 18000 MPa, and/or about 30 percent glass fibers. At least one electrical receptacle may be housed by an inner core of the plug assembly for electrical communication with the conductor pin. An annular sealing member may be supported by an outer body of the plug assembly for sealingly engaging the fence. | 03-05-2009 |
| 20080317619 | TANDEM COMPRESSOR SYSTEM AND METHOD - A compressor system including a first compressor and a second compressor. The first and second compressors each include a shell, a compression mechanism disposed within the shell, and a drive member adapted to drive the compression mechanism. A discharge tube assembly interconnects the first compressor and the second compressor, and the discharge tube assembly includes an inlet portion adjacent the first compressor that is inclined relative to another inlet portion adjacent the second compressor. The inlet portion that is inclined is adapted to prevent a backflow of oil through the discharge tube assembly. | 12-25-2008 |
| 20080286118 | CAPACITY MODULATED SCROLL COMPRESSOR SYSTEM AND METHOD - A system and method for modulating capacity of a scroll compressor having a motor includes determining a target capacity of the scroll compressor, operating the motor at a first speed when the target capacity is within a first predetermined capacity range and at a second speed when the target capacity is within a second predetermined capacity range, determining a pulse width modulation cyclic ratio based on the target capacity and the first or second speed, and periodically separating intermeshing scroll members of the compressor according to the pulse width modulation cyclic ratio to modulate the capacity of the scroll compressor. | 11-20-2008 |
| 20080219872 | SCROLL MACHINE HAVING COUNTERWEIGHTS WITH CHANGEABLE CAVITY - A balancing system for different compressors utilizes a counterweight having a common exterior configuration. The mass of the counterweight is optimized for each compressor by changing the size of a recess located in the counterweight. In one embodiment, the recess is an arcuately shaped recess; and in another embodiment, the recess is a plurality of holes. | 09-11-2008 |
