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An apparatus for diagnosing a cooling system includes a first sensor for sensing a first operating parameter, a second sensor for sensing a motor operating parameter, a controller in communication with the sensors for receiving a signal from each of the sensors, and a computer in communication with

An apparatus for diagnosing a cooling system includes a first sensor for sensing a first operating parameter, a second sensor for sensing a motor operating parameter, a controller in communication with the sensors for receiving a signal from each of the sensors, and a computer in communication with the controller. The computer includes a memory storing normal operating parameters for a plurality of cooling systems, and is operable to compare the first and motor operating parameters with the normal parameters of one of the plurality of cooling systems to diagnose the cooling system.

대표청구항 ▼

What is claimed is: 1. A cooling system diagnostic apparatus comprising: a first sensor operable to sense a first cooling system parameter; a second sensor operable to sense a motor operating parameter; a controller in communication with said first and second sensors and operable to receive first s

What is claimed is: 1. A cooling system diagnostic apparatus comprising: a first sensor operable to sense a first cooling system parameter; a second sensor operable to sense a motor operating parameter; a controller in communication with said first and second sensors and operable to receive first sensor data from said first sensor and second sensor data from said second sensor a master computer having a memory storing a plurality of data sets containing normal operating parameters for a plurality of systems; and a computer in communication with said master computer to acquire one of said plurality of datasets from said master computer and in communication with said controller to receive said first sensor data and said second sensor data, said computer comparing said first sensor data and said second sensor data with said normal operating parameters to provide a diagnosis. 2. The apparatus of claim 1, wherein said first operating parameter is a low-side pressure and said motor operating parameter is a compressor motor supply voltage. 3. The apparatus of claim 2, further comprising a third sensor operable to detect high-side pressure. 4. The apparatus of claim 2, wherein said first operating parameter is a low-side pressure and said motor operating parameter is a compressor motor rotational speed. 5. The apparatus of claim 4, further comprising a third sensor operable to detect high-side pressure. 6. The apparatus of claim 1, wherein said first operating parameter is a low-side pressure measurement and said motor operating parameter is a compressor motor supply amperage. 7. The apparatus of claim 6, further comprising a third sensor operable to detect high-side pressure. 8. The apparatus of claim 1, further comprising a third sensor operable to detect an evaporator refrigerant temperature. 9. The apparatus of claim 1, further comprising a third sensor operable to detect a condenser refrigerant temperature. 10. The apparatus of claim 1, wherein said computer and said master computer are in communication through the Internet. 11. The apparatus of claim 1, wherein said computer and said master computer are in wireless communication. 12. The apparatus of claim 1, wherein said computer is operable to output repair instructions. 13. The apparatus of claim 1, further comprising a barcode reader in communication with said computer. 14. A method comprising: measuring a first cooling system operating parameter; measuring a second cooling system operating parameter; measuring a compressor motor operating parameter; communicating said first cooling system parameter, said second cooling system operating parameter, and said compressor motor operating parameter to a controller; communicating said first cooling system parameter, said second cooling system parameter, and said compressor motor operating parameter from said controller to a computer; selecting a dataset of normal operating parameters from a master computer located remotely from said computer; downloading said normal operating parameters from said master computer to said computer; comparing said set of normal operating parameters to said provided operating parameters at said computer; and outputting diagnostic results. 15. The method of claim 14, further comprising storing said system types in said computer. 16. The method of claim 14, wherein said selecting includes inputting a system identifier. 17. The method of claim 14, wherein said selecting includes communicating a selection between said computer and said master computer. 18. The method of claim 17, wherein said downloading a selection includes communicating through the Internet. 19. The method of claim 14, wherein said outputting diagnostic results includes providing instructions for cooling system repair. 20. A data acquisition system comprising: a master computer storing predefined operating parameters for a plurality of system types; a first sensor operable to sense a first cooling system operating parameter; a second sensor operable to sense a compressor motor operating parameter; a controller in communication with said first sensor and said second sensor and operable to receive first sensor data from said first sensor and second sensor data from said second sensor; and a computer selecting said predefined operating parameters from said master computer and including an input for receiving said first cooling system operating parameter and said second cooling system operating parameter from said controller, said computer comparing said first cooling system operating parameter and said second cooling system operating parameter to said predefined operating parameters to diagnose the cooling system. 21. The data acquisition system of claim 20, further comprising a third sensor operable to sense a second cooling system operating parameter and communicate said second cooling system operating parameter to said computer, wherein said monitored operating parameters include said first cooling system operating parameter, said second cooling system operating parameter, and said compressor motor operating parameter. 22. The data acquisition system of claim 21, wherein said first cooling system operating parameter is low-side pressure, said second cooling system operating parameter is high-side pressure, and said compressor motor operating parameter is compressor motor supply voltage. 23. The data acquisition system of claim 21, wherein said first cooling system operating parameter is low-side pressure, said second cooling system operating parameter is high-side pressure, and said motor operating parameter is compressor motor supply amperage. 24. The data acquisition system of claim 21, wherein said first cooling system operating parameter is low-side pressure, said second cooling system operating parameter is high-side pressure, and said compressor motor operating parameter is compressor motor rotational speed. 25. The data acquisition system of claim 21, wherein said first cooling system operating parameter is low side pressure, said second cooling system operating parameter is high side pressure, and further comprising a fourth sensor operable to sense an evaporator refrigerant temperature, wherein said monitored operating parameters further include said evaporator refrigerant temperature. 26. The data acquisition system of claim 21, wherein said first cooling system operating parameter is low side pressure, said second cooling system operating parameter is high side pressure, and further comprising a fourth sensor operable to sense a condenser refrigerant temperature, wherein said monitored operating parameters further include said condenser refrigerant temperature. 27. The data acquisition system of claim 20, wherein said computer includes a memory for storing said predefined operating parameters. 28. The data acquisition system of claim 20, wherein said computer and said master computer are in communication through the Internet. 29. The data acquisition system of claim 20, wherein said computer and said master computer are in wireless communication. 30. The data acquisition system of claim 20, wherein said computer is operable to provide repair instructions. 31. The data acquisition system of claim 20, wherein said computer is a hand-held computer. 32. A method for monitoring a system including a refrigerant compressor, evaporator, and condenser, said method comprising: measuring a first operating parameter of the monitored system; measuring a second operating parameter of the monitored system; measuring a motor operating parameter of the monitored system; communicating said first operating parameter, said second operating parameter, and said motor operating parameter to a controller; providing at least one of said first operating parameter, said second operating parameter, and said motor operating parameter from said controller to a computer; retrieving a dataset of predefined operating parameters for the monitored system from a plurality of predetermined operating parameters from a master computer; comparing said predefined operating parameters from said selected dataset with said at least one provided operating parameter of the monitored system at said computer; and providing diagnostic results based on said comparing. 33. The method for monitoring a system in accordance with claim 32, wherein said retrieving includes inputting an identifier of the monitored system. 34. The method for monitoring a system in accordance with claim 33, wherein said inputting includes reading said identifier with a barcode reader. 35. The method for monitoring a system in accordance with claim 32, wherein said retrieving includes communicating through the Internet. 36. The method for monitoring a system in accordance with claim 32, wherein said retrieving includes wirelessly communicating. 37. The method for monitoring a system in accordance with claim 32, wherein said providing diagnostic results includes providing repair instructions. 38. The method for monitoring a system in accordance with claim 32, further comprising performing a test session prior to comparing said set of predefined operating parameters with said provided operating parameters of the monitored system. 39. A system comprising: a master computer including predefined operating parameters for a plurality of cooling systems; a microcontroller in communication with a first sensor monitoring a motor operating parameter of a monitored cooling system and a second sensor monitoring a temperature or pressure parameter of said monitored cooling system; and a computer in communication with the microcontroller to receive at least one of said motor parameter and said temperature or pressure parameter, in communication with and remotely located from said master computer to receive said predetermined operating parameters from said master computer and to compare said motor, temperature or pressure parameter with said predefined operating parameters of one of the plurality of cooling systems, and operable to diagnose said monitored cooling system based on comparing said at least one motor, temperature or pressure parameter to said predefined operating parameters. 40. The system of claim 39, wherein said microcontroller receives said motor parameter and at said temperature or pressure parameter of said monitored cooling system. 41. The system of claim 39, wherein said microcontroller receives said motor parameter and both of said temperature or pressure parameters. 42. The system of claim 39, wherein said computer is a hand-held computer. 43. The system of claim 39, wherein said communication between said master computer and said computer includes communication via the Internet. 44. The system of claim 39, wherein said communication between said master computer and said computer includes wireless communication. 45. The system of claim 39, further comprising a diagnostic program executed by said master computer to diagnose said monitored cooling system. 46. The system of claim 39, wherein said motor operating parameter includes at least one of compressor supply voltage, compressor supply amperage and compressor rotational speed. 47. The system of claim 39, wherein said temperature or pressure parameter includes at least one of evaporator refrigerant temperature, condenser refrigerant temperature, ambient temperature, conditioned space temperature, superheat temperature, super cooling temperature, compressor discharge temperature, compressor suction pressure, and compressor discharge pressure. 48. The system of claim 39, further comprising a diagnostic program executed by said computer to diagnose said monitored cooling system. 49. The system of claim 39, wherein said plurality of cooling systems are differentiated by system configurations including at least one of refrigerant type, expansion device type, compressor type, unloading scheme, and condenser cooling scheme. 50. The system of claim 39, wherein said first operating parameter is a low-side pressure measurement and said motor operating parameter is a compressor motor supply amperage. 51. The system of claim 39, wherein said first operating parameter is a low-side pressure and said motor operating parameter is a compressor motor rotational speed. 52. The system of claim 39, further comprising a third sensor operable to detect an evaporator refrigerant temperature. 53. The system of claim 39, further comprising a third sensor operable to detect a condenser refrigerant temperature. 54. The system of claim 39, wherein said computer is operable to output repair instructions.