Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20050166610 A1
Publication typeApplication
Application numberUS 11/095,711
Publication dateAug 4, 2005
Filing dateMar 31, 2005
Priority dateNov 22, 2000
Also published asCN1243202C, CN1354347A, DE60121530D1, DE60121530T2, EP1209427A1, EP1209427B1, US6324854, US6560976, US6823680, US7174728, US7412839, US20020059803, US20030051490, US20040206096, US20050000235
Publication number095711, 11095711, US 2005/0166610 A1, US 2005/166610 A1, US 20050166610 A1, US 20050166610A1, US 2005166610 A1, US 2005166610A1, US-A1-20050166610, US-A1-2005166610, US2005/0166610A1, US2005/166610A1, US20050166610 A1, US20050166610A1, US2005166610 A1, US2005166610A1
InventorsNagaraj Jayanth
Original AssigneeNagaraj Jayanth
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cooling system diagnostic system apparatus and method
US 20050166610 A1
Abstract
An apparatus and method for diagnosing a cooling system includes a first sensor operable to detect a compressor supply amperage, a second sensor operable to detect a compressor supply voltage, and a third sensor operable to detect a compressor rotational speed. A controller in communication with the first, second and third sensors communicates with a computer that compares at least two of the supply amperage, supply voltage and rotational speed with normal operating parameters, and outputs a diagnosis.
Images(3)
Previous page
Next page
Claims(18)
1. A cooling system diagnostic apparatus comprising:
a first sensor operable to detect a compressor supply amperage;
a second sensor operable to detect a compressor supply voltage;
a third sensor operable to detect a compressor rotational speed; and
a computer operable to output a diagnosis based on comparing at least two of said compressor supply amperage, said compressor supply voltage and said compressor rotational speed with normal operating parameters.
2. The cooling system of claim 1, further comprising a controller in communication with said first sensor, said second sensor, and said third sensor, operable to receive a signal from said first sensor, said second sensor, and said third sensor, and operable to communicate said signal to said computer.
3. The cooling system of claim 1, further comprising a fourth sensor operable to detect a low-side pressure.
4. The cooling system of claim 3, further comprising a fifth sensor operable to detect a high-side pressure.
5. The cooling system of claim 4 wherein said computer is operable to output a diagnosis based on comparing said low-side pressure and said high side pressure and at least two of said compressor supply amperage, said compressor supply voltage and said compressor rotational speed, with normal operating parameters.
6. The cooling system of claim 1, further comprising:
a master computer disposed remote from said computer, wherein said computer and said master computer are in communication.
7. The cooling system of claim 6, wherein said computer and said master computer are in communication through the Internet.
8. The cooling system of claim 6, wherein said computer and said master computer are in wireless communication.
9. The cooling system of claim 1, wherein said computer is operable to output repair instructions.
10. The cooling system of claim 1, further comprising a barcode reader in communication with said computer.
11. A method for diagnosing a cooling system comprising:
detecting a compressor supply amperage;
detecting a compressor supply voltage;
detecting a compressor rotational speed; and
comparing at least two of said compressor supply amperage, said compressor supply voltage and said compressor rotational speed with normal operating parameters;
outputting a diagnosis based on said comparing.
12. The method of claim 11, further comprising detecting a low-side pressure.
13. The method of claim 12, further comprising detecting a high-side pressure.
14. The method of claim 13, wherein said comparing includes comparing said high-side pressure and said low-side pressure with normal operating parameters
15. The method of claim 11, further comprising communicating said compressor supply amperage, said compressor supply voltage and said compressor rotational speed to a remote computer
16. The method of claim 15, wherein said communicating includes communicating through the Internet.
17. The method of claim 15, wherein said communicating includes communicating wirelessly.
18. The method of claim 11, further comprising outputting repair instructions.
Description
    CROSS-REFERENCE TO RELATED APPLICATIONS
  • [0001]
    This application is a continuation of U.S. patent application Ser. No. 10/844,607 filed on May 12, 2004, which is a continuation of U.S. patent application Ser. No. 10/280,774 filed on Oct. 25, 2002 (now U.S. Pat. No. 6,823,680), which is a continuation of U.S. patent application Ser. No. 10/012,631 filed on Dec. 7, 2001 (now U.S. Pat. No. 6,560,976), which is a continuation of U.S. patent application Ser. No. 09/721,594 filed on Nov. 22, 2000 (now U.S. Pat. No. 6,324,854), which are incorporated herein by reference.
  • FIELD OF THE INVENTION
  • [0002]
    The present invention relates generally to an apparatus and a method for servicing a cooling system.
  • BACKGROUND AND SUMMARY OF THE INVENTION
  • [0003]
    Several air-conditioning service units are available to assist a trained technician in servicing an air-conditioning system. Some prior art units are adapted to be connected to the high- and low-pressure sides of the air-conditioning system and these units include gauges for measuring the high and low side pressures of the system under the appropriate operating conditions. These measured values are then manually compared with known standards for the particular air-conditioning system being tested. From this manual comparison and other observable characteristics of the system, the technician decides whether or not the system is operating properly. If a system malfunction is indicated, the technician determines the possible causes of the malfunction and decides how the system should be repaired.
  • [0004]
    Expensive and high-end large commercial air-conditioning systems are typically provided with their own sophisticated electronics and a host of internal sensors. The sophisticated electronics and the host of sensors for these large commercial systems simplify the diagnosis for these systems. However, the costs associated with these electronics and the sensors is too much for cost sensitive systems like residential air-conditioning systems and small commercial installations. In these smaller systems, the servicing efficiency is still dependent upon the skill of the technician. The tools that the technician typically uses to help in the diagnosis are pressure gauges, service units which suggest possible fixes, common electronic instruments like multi-meters and component data books which supplement the various service units that are available. Even though these tools have improved over the years in terms of accuracy, ease of use and reliability, the technician still has to rely on his own personal skill and knowledge in interpreting the results of these instruments. The problems associated with depending upon the skill and knowledge of the service technician is expected to compound in the future due in part to the introduction of many new refrigerants. Thus, the large experience that the technicians have gained on current day refrigerants will not be adequate for the air-conditioning systems of the future. This leads to a high cost for training and a higher incident of misdiagnosing which needs to be addressed.
  • [0005]
    During the process of this diagnosis by the technician, he typically relies on his knowledge and his past experience. Thus, accurate diagnosis and repair require that the technician possess substantial experience. The problem of accurate diagnosis is complicated by the large number of different air-conditioning systems in the marketplace. While each air-conditioning system includes a basic air-conditioning cycle, the various systems can include components and options that complicate the diagnosis for the system as a whole. Accordingly, with these prior art service units, misdiagnosis can occur, resulting in improperly repaired systems and in excessive time to complete repairs.
  • [0006]
    Although service manuals are available to assist the technician in diagnosing and repairing the air-conditioning systems, their use is time-consuming and inefficient. In addition, the large number of manuals require valuable space and each manual must be kept up to date.
  • [0007]
    In order to improve over the above described diagnosis procedures, service units have been designed which employ electronic processing means for initially diagnosing the air-conditioning system and, thereafter, if tests or repairs are needed, for guiding the mechanic to correction of its defective operation. When using these prior art service units, the technician identifies what type of system is being diagnosed. The service units are then capable of receiving signals which are indicative of the high and low side pressures of the air-conditioning system. Based upon the observed pressures in relation to the programmed standards for the type of air-conditioning system being tested, the service unit indicates whether or not the system is functioning properly. If the air-conditioning system is not functioning properly, a list of possible defective components and/or other possible causes of the system malfunction are identified. This list could range from a complete self-diagnosis where the problem is clearly identified to interactive dialog that narrows down the possible causes of the problem. The systems that monitor only the high and low pressure side pressures of the air-conditioning system are thus inherently limited in their diagnostic ability. What is needed is an air-conditioning service system which monitors not only the system's pressures, but the system should monitor other conditions such as various temperatures within the system as well as operating parameters of the motor driving the system in order to enable a more accurate diagnosis.
  • [0008]
    The present invention provides the art with a diagnostic system which is applicable to the present day air-conditioning systems as well as being adaptable to the air-conditioning systems of the future. The present invention provides a data acquisition system which includes a judicious integration of sensors. The sensors monitor the system's pressures, various temperatures within the system as well as operating parameters for the motor driving the system. By incorporating these additional sensors and specifically the motor operating sensors, the data acquisition system can provide better diagnostic results for the air-conditioning system. The data acquisition system coupled with a hand held computer using sophisticated software provides a reasonable cost diagnostic tool for a service technician. In the very cost sensitive systems like residential air-conditioning systems, this diagnostic tool eliminates the need for having each system equipped with independent sensors and electronics, yet they will still have the capability to assist the technician to efficiently service the air-conditioning system when there is a problem. The diagnostic tool also includes a wireless Internet link with a master computer which contains the service information on all of the various systems in use. In this way, the hand held computer can be constantly updated with new information as well as not being required to maintain files on every system. If the technician encounters a system not on file in his hand held computer, a wireless Internet link to the master computer can identify the missing information.
  • [0009]
    Other advantages and objects of the present invention will become apparent to those skilled in the art from the subsequent detailed description, appended claims and drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0010]
    In the drawings which illustrate the best mode presently contemplated for carrying out the present invention:
  • [0011]
    FIG. 1 schematically illustrates a typical air-conditioning system in accordance with the present invention;
  • [0012]
    FIG. 2 schematically illustrates an air-conditioning service system in accordance with the present invention; and
  • [0013]
    FIG. 3 schematically illustrates the air-conditioning service system shown in FIG. 2 coupled with the air-conditioning system shown in FIG. 1.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0014]
    Referring now to the drawings in which like reference numerals designate like or corresponding parts throughout the several views, there is shown in FIG. 1 an air-conditioning system for use with the service system in accordance with the present invention and which is designated generally by the reference numeral 10. Air-conditioning system 10 comprises a compressor 12 which compresses refrigerant gas and delivers it to a condenser 14 where the compressed gas is converted to a liquid. Condensor 14 discharges through a sight glass 16 which provides visual observation of the fill level of refrigerant in the system during operation. Sight glass 16 also normally includes a reservoir for storing liquid refrigerant under conditions of large load fluctuations on the system, and includes a high-pressure filter and desiccant to trap and hold any moisture or solid particles which may be present in the system. From sight glass 16, the refrigerant is delivered through an expansion valve 18 to an evaporator 20 where the refrigerant is evaporated into gaseous form as the system provides cooling in a well known manner. From evaporator 20, the refrigerant returns to compressor 12 to again start the above described refrigeration cycle.
  • [0015]
    For purposes of initial charging system 10 and for periodic servicing of system 10, compressor 12 has a pair of refrigerant ports 22 and 24. Port 22 is located at or near the low pressure suction port for compressor 12 and port 24 is located at or near the high pressure discharge port for compressor 12. Ports 22 and 24 provide connections for pressure gauge readings and for the addition of refrigerant and/or lubricating oil at either the suction side or the discharge side of compressor 12.
  • [0016]
    Referring now to FIGS. 2 and 3, an air-conditioning service system or apparatus 30 is illustrated. Apparatus 30 comprises a data acquisition system 32, a hand held computer 34, a pair of pressure hoses 36 and 38, and a plurality of sensors 40. Data acquisition system 32 includes a micro-controller 42, a pair of pressure sensors 44 and 46 and an Analog to Digital converter 48. Pressure hose 36 is adapted to be attached to port 22 to monitor the pressure at or near the suction port of compressor 12. Pressure hose 38 is adapted to be attached to port 24 to monitor the pressure at or near the discharge port of compressor 12. Each hose 36 and 38 is in communication with sensors 44 and 46, respectively, and each sensor 44 and 46 provides an analog signal to A/D converter 48 which is indicative of the pressure being monitored. A/D converter 48 receives the analog signal from sensors 44 and 46, converts this analog signal to a digital signal which is indicative of the pressure being monitored and provides this digital system to micro-controller 42.
  • [0017]
    Sensors 40 are adapted to monitor various operating characteristics of compressor 12. Several sensors 40 monitor specific temperatures in the system, one sensor monitors compressor supply voltage, one sensor monitors compressor supply amperage and one sensor monitors the rotational speed (RPM) for compressor 12. Typical temperatures that can be monitored include evaporator refrigerant temperature, condenser refrigerant temperature, ambient temperature and conditioned space temperature. The analysis of parameters like compressor voltage, compressor current, compressor RPM and discharge temperature can provide valuable information regarding the cause of the problem. Each sensor 40 is connected to A/D converter 48 and sends an analog signal indicative of its sensed parameter to A/D converter 48. A/D converter 48 receives the analog signals from sensors 40 and converts them to a digital signal indicative of the sensed parameter and provides this digital signal to micro-controller 42.
  • [0018]
    Micro-controller 42 is in communication with computer 34 and provides to computer 34 the information provided by micro-controller 42. Once computer 34 is provided with the air-conditioning system configuration and the sensed parameters from sensors 40, 44 and 46, a diagnostic program can be performed. The air-conditioning system configuration can be provided to computer 34 manually by the technician or it can be provided to computer 34 by a bar code reader 50 if the air-conditioning system is provided with a bar code label which sufficiently identifies the air-conditioning system.
  • [0019]
    In order for the diagnostic program to run, computer 34 must know what the normal parameters for the monitored air conditioning system should be. This information can be kept in the memory of computer 34, it can be kept in the larger memory of a master computer 52 or it can be kept in both places. Master computer 52 can be continuously updated with new models and revised information as it becomes available. When accessing the normal parameters in its own memory, computer 34 can immediately use the saved normal parameters or computer 34 can request the technician to connect to master computer 52 to confirm and/or update the normal parameters. The connection to the master computer 52 is preferably accomplished through a wireless Internet connection 54 in order to simplify the procedure for the technician. Also, if the particular air conditioning system being monitored is not in the memory of computer 34, computer 34 can prompt the technician to connect to master computer 52 using wireless Internet connection 54 to access the larger database which is available in the memory of master computer 52. In this way, computer 34 can include only the most popular systems in its memory but still have access to the entire population or air-conditioning systems through connection 54. While the present invention is being illustrated utilizing wireless Internet connection 54, it is within the scope of the present invention to communicate between computers 34 and 52 using a direct wireless or a wire connection if desired.
  • [0020]
    The technician using apparatus 30 would first hook up pressure hose 36 to port 22 and pressure hose 38 to port 24. The technician would then hook up the various temperature sensors 40, the compressor supply voltage and current sensors 40 and the compressor RPM sensor 40. The technician would then initialize computer 34 and launch the diagnostics application software. The software on start-up prompts the technician to set up the test session. The technician then picks various options such as refrigerant type of the system and the system configuration, like compressors and system model number, expansion device type or other information for the configuration system. Optionally this information can be input into computer 34 using a barcode label and barcode reader 50 if this option is available. The software then checks to see if the operating information for the system or the compressor model exists within its memory. If this information is not within its memory, computer 34 will establish a wireless connection to master computer 52 through wireless Internet connection 54 and access this information from master computer 52. Also, optionally, computer 34 can prompt the technician to update the existing information in its memory with the information contained in the memory of master computer 52 or computer 34 can prompt the technician to add the missing information to its memory from the memory of master computer 52.
  • [0021]
    Once the test session is set up, the software commands micro-controller 42 to acquire the sensed values from sensors 40, 44 and 46. Micro-controller 42 has its own custom software that verifies the integrity of the values reported by sensors 40, 44 and 46. An example would be that micro-controller 42 has the ability to detect a failed sensor. The sensors values acquired by micro-controller 42 through A/D converter 48 are reported back to computer 34. This cycle of sensor data is acquired continuously throughout the test session. The reported sensed data is then used to calculate a variety of system operating parameters. For example, superheat, supercooling, condensing temperature, evaporating temperature, and other operating parameters can be determined. The software within computer 34 then compares these values individually or in combination with the diagnostics rules programmed and then based upon these comparisons, the software derives a set of possible causes to the differences between the measured values and the standard operating values. The diagnostic rules can range from simple limits to fuzzy logic to trend analysis. The diagnostic rules can also range from individual values to a combination of values.
  • [0022]
    For example, the current drawn by compressor 12 is related to the suction and discharge pressures and is unique to each compressor model. Also, the superheat settings are unique to each air-conditioning system. Further, the diagnostic rules are different for different system configurations like refrigerant type, expansion device type, compressor type, unloading scheme, condensor cooling scheme and the like. In some situations, the application of the diagnostic rules may lead to the requirement of one or more additional parameters. For example, the diagnostic system may require the indoor temperature which may not be currently sensed. In this case, the technician will be prompted to acquire this valve by other means and to input its value into the program. When the criteria for a diagnostic rule have been satisfied, then a cause or causes of the problem is displayed to the technician together with solutions to eliminate the problem. For example, a high superheat condition in combination with several other conditions suggests a low refrigerant charge and the solution would be to add refrigerant to the system. The technician can then carry out the suggested repairs and then rerun the test. When the system is again functioning normally, the test results and the sensed values can be saved for future reference.
  • [0023]
    While sensors 40 are disclosed as being hard wired to A/D converter 48, it is within the scope of the present invention to utilize wireless devices to reduce the number of wiring hookups that need to be made.
  • [0024]
    Also, while apparatus 30 is being disclosed as a diagnostic tool, it is within the scope of the present invention to include an automatic refrigerant charging capability through hoses 36 and 38 if desired. This would involve the addition of a control loop to meter refrigerant into the system from a charging cylinder. Accurate charging would be accomplished by continuously monitoring the system parameters during the charging process.
  • [0025]
    While the above detailed description describes the preferred embodiment of the present invention, it should be understood that the present invention is susceptible to modification, variation and alteration without deviating from the scope and fair meaning of the subjoined claims.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3232519 *May 7, 1963Feb 1, 1966Vilter Manufacturing CorpCompressor protection system
US4470092 *Sep 27, 1982Sep 4, 1984Allen-Bradley CompanyProgrammable motor protector
US4497031 *Jul 26, 1982Jan 29, 1985Johnson Service CompanyDirect digital control apparatus for automated monitoring and control of building systems
US4520674 *Nov 14, 1983Jun 4, 1985Technology For Energy CorporationVibration monitoring device
US4630670 *Jun 17, 1985Dec 23, 1986Carrier CorporationVariable volume multizone system
US4755957 *Mar 27, 1986Jul 5, 1988K-White Tools, IncorporatedAutomotive air-conditioning servicing system and method
US4798055 *Oct 28, 1987Jan 17, 1989Kent-Moore CorporationRefrigeration system analyzer
US4831560 *Aug 26, 1987May 16, 1989Zaleski James VMethod for testing auto electronics systems
US4881184 *Sep 8, 1987Nov 14, 1989Datac, Inc.Turbine monitoring apparatus
US4885707 *Feb 19, 1987Dec 5, 1989Dli CorporationVibration data collecting and processing apparatus and method
US4885914 *Feb 14, 1989Dec 12, 1989Honeywell Inc.Coefficient of performance deviation meter for vapor compression type refrigeration systems
US4964060 *Dec 4, 1985Oct 16, 1990Hartsog Charles HComputer aided building plan review system and process
US4985857 *Aug 19, 1988Jan 15, 1991General Motors CorporationMethod and apparatus for diagnosing machines
US5058388 *Aug 27, 1990Oct 22, 1991Allan ShawMethod and means of air conditioning
US5071065 *Jan 11, 1990Dec 10, 1991Halton OyProcedure for controlling and maintaining air currents or equivalent in an air-conditioning installation, and an air-conditioning system according to said procedure
US5073862 *Oct 31, 1989Dec 17, 1991Carlson Peter JMethod and apparatus for diagnosing problems with the thermodynamic performance of a heat engine
US5115406 *Oct 5, 1990May 19, 1992Gateshead Manufacturing CorporationRotating machinery diagnostic system
US5179214 *Sep 23, 1991Jan 12, 1993Texaco Chemical CompanyProcess for manufacturing alkylene carbonates
US5209076 *Jun 5, 1992May 11, 1993Izon, Inc.Control system for preventing compressor damage in a refrigeration system
US5209400 *Mar 7, 1991May 11, 1993John M. WinslowPortable calculator for refrigeration heating and air conditioning equipment service
US5279458 *Aug 12, 1991Jan 18, 1994Carrier CorporationNetwork management control
US5299504 *Jun 30, 1992Apr 5, 1994Technical Rail Products, IncorporatedSelf-propelled rail heater car with movable induction heating coils
US5303560 *Apr 15, 1993Apr 19, 1994Thermo King CorporationMethod and apparatus for monitoring and controlling the operation of a refrigeration unit
US5311451 *Dec 6, 1991May 10, 1994M. T. Mcbrian Company, Inc.Reconfigurable controller for monitoring and controlling environmental conditions
US5335507 *Nov 12, 1993Aug 9, 1994Ecoair CorporatedControl system for an air conditioning/refrigeration system
US5416781 *Mar 17, 1992May 16, 1995Johnson Service CompanyIntegrated services digital network based facility management system
US5440890 *Dec 10, 1993Aug 15, 1995Copeland CorporationBlocked fan detection system for heat pump
US5440895 *Jan 24, 1994Aug 15, 1995Copeland CorporationHeat pump motor optimization and sensor fault detection
US5446677 *Apr 28, 1994Aug 29, 1995Johnson Service CompanyDiagnostic system for use in an environment control network
US5454229 *May 18, 1994Oct 3, 1995Thermo King CorporationRefrigeration unit control with shutdown evaluation and automatic restart
US5460006 *Nov 16, 1993Oct 24, 1995Hoshizaki Denki Kabushiki KaishaMonitoring system for food storage device
US5481481 *Nov 23, 1992Jan 2, 1996Architectural Engergy CorporationAutomated diagnostic system having temporally coordinated wireless sensors
US5499512 *Apr 14, 1995Mar 19, 1996Thermo King CorporationMethods and apparatus for converting a manually operable refrigeration unit to remote operation
US5511387 *Jan 17, 1995Apr 30, 1996Copeland CorporationRefrigerant recovery system
US5528908 *Jun 6, 1995Jun 25, 1996Copeland CorporationBlocked fan detection system for heat pump
US5548966 *Jun 7, 1995Aug 27, 1996Copeland CorporationRefrigerant recovery system
US5596507 *Aug 15, 1994Jan 21, 1997Jones; Jeffrey K.Method and apparatus for predictive maintenance of HVACR systems
US5630325 *Jun 1, 1995May 20, 1997Copeland CorporationHeat pump motor optimization and sensor fault detection
US5875638 *Mar 23, 1995Mar 2, 1999Copeland CorporationRefrigerant recovery system
US5924295 *Oct 7, 1997Jul 20, 1999Samsung Electronics Co., Ltd.Method and apparatus for controlling initial operation of refrigerator
US5956658 *Jul 8, 1997Sep 21, 1999Diagnostic Instruments LimitedPortable data collection apparatus for collecting maintenance data from a field tour
US6081750 *Jun 6, 1995Jun 27, 2000Hoffberg; Steven MarkErgonomic man-machine interface incorporating adaptive pattern recognition based control system
US6179214 *Jul 21, 1999Jan 30, 2001Carrier CorporationPortable plug-in control module for use with the service modules of HVAC systems
US6279332 *Jun 14, 2000Aug 28, 2001Samsung Electronics Co., Ltd.Performance testing method of air conditioner
US6502409 *May 3, 2000Jan 7, 2003Computer Process Controls, Inc.Wireless method and apparatus for monitoring and controlling food temperature
US20010025349 *Jan 8, 2001Sep 27, 2001Sharood John N.Retrofit monitoring device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7878006Apr 4, 2005Feb 1, 2011Emerson Climate Technologies, Inc.Compressor diagnostic and protection system and method
US7905098Apr 4, 2005Mar 15, 2011Emerson Climate Technologies, Inc.Compressor diagnostic and protection system and method
US8160827Oct 30, 2008Apr 17, 2012Emerson Climate Technologies, Inc.Compressor sensor module
US8239066Oct 21, 2009Aug 7, 2012Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8255086Oct 21, 2009Aug 28, 2012Lennox Industries Inc.System recovery in a heating, ventilation and air conditioning network
US8260444Feb 17, 2010Sep 4, 2012Lennox Industries Inc.Auxiliary controller of a HVAC system
US8295981Oct 21, 2009Oct 23, 2012Lennox Industries Inc.Device commissioning in a heating, ventilation and air conditioning network
US8335657Jul 5, 2011Dec 18, 2012Emerson Climate Technologies, Inc.Compressor sensor module
US8352080Oct 21, 2009Jan 8, 2013Lennox Industries Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8352081Oct 21, 2009Jan 8, 2013Lennox Industries Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8393169Mar 24, 2008Mar 12, 2013Emerson Climate Technologies, Inc.Refrigeration monitoring system and method
US8433446Oct 21, 2009Apr 30, 2013Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed-architecture heating, ventilation and air conditioning network
US8437877Oct 21, 2009May 7, 2013Lennox Industries Inc.System recovery in a heating, ventilation and air conditioning network
US8437878Oct 21, 2009May 7, 2013Lennox Industries Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
US8442693Oct 21, 2009May 14, 2013Lennox Industries, Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8452456Oct 21, 2009May 28, 2013Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8452906Oct 21, 2009May 28, 2013Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8463442Oct 21, 2009Jun 11, 2013Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
US8463443Oct 21, 2009Jun 11, 2013Lennox Industries, Inc.Memory recovery scheme and data structure in a heating, ventilation and air conditioning network
US8474278Feb 18, 2011Jul 2, 2013Emerson Climate Technologies, Inc.Compressor diagnostic and protection system and method
US8543243Oct 21, 2009Sep 24, 2013Lennox Industries, Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8548630Oct 21, 2009Oct 1, 2013Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed-architecture heating, ventilation and air conditioning network
US8560125Oct 21, 2009Oct 15, 2013Lennox IndustriesCommunication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8564400Oct 21, 2009Oct 22, 2013Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8590325Jul 12, 2007Nov 26, 2013Emerson Climate Technologies, Inc.Protection and diagnostic module for a refrigeration system
US8600558Oct 21, 2009Dec 3, 2013Lennox Industries Inc.System recovery in a heating, ventilation and air conditioning network
US8600559Oct 21, 2009Dec 3, 2013Lennox Industries Inc.Method of controlling equipment in a heating, ventilation and air conditioning network
US8615326Oct 21, 2009Dec 24, 2013Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8655490Oct 21, 2009Feb 18, 2014Lennox Industries, Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8655491Oct 21, 2009Feb 18, 2014Lennox Industries Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
US8661165Oct 21, 2009Feb 25, 2014Lennox Industries, Inc.Device abstraction system and method for a distributed architecture heating, ventilation and air conditioning system
US8694164Oct 21, 2009Apr 8, 2014Lennox Industries, Inc.Interactive user guidance interface for a heating, ventilation and air conditioning system
US8725298Oct 21, 2009May 13, 2014Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and conditioning network
US8744629Oct 21, 2009Jun 3, 2014Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8761945Aug 30, 2012Jun 24, 2014Lennox Industries Inc.Device commissioning in a heating, ventilation and air conditioning network
US8762666Oct 21, 2009Jun 24, 2014Lennox Industries, Inc.Backup and restoration of operation control data in a heating, ventilation and air conditioning network
US8774210Oct 21, 2009Jul 8, 2014Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8788100Oct 21, 2009Jul 22, 2014Lennox Industries Inc.System and method for zoning a distributed-architecture heating, ventilation and air conditioning network
US8788104Jul 30, 2012Jul 22, 2014Lennox Industries Inc.Heating, ventilating and air conditioning (HVAC) system with an auxiliary controller
US8798796Oct 21, 2009Aug 5, 2014Lennox Industries Inc.General control techniques in a heating, ventilation and air conditioning network
US8802981Oct 21, 2009Aug 12, 2014Lennox Industries Inc.Flush wall mount thermostat and in-set mounting plate for a heating, ventilation and air conditioning system
US8855825Oct 21, 2009Oct 7, 2014Lennox Industries Inc.Device abstraction system and method for a distributed-architecture heating, ventilation and air conditioning system
US8874815Oct 21, 2009Oct 28, 2014Lennox Industries, Inc.Communication protocol system and method for a distributed architecture heating, ventilation and air conditioning network
US8892797Oct 21, 2009Nov 18, 2014Lennox Industries Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8964338Jan 9, 2013Feb 24, 2015Emerson Climate Technologies, Inc.System and method for compressor motor protection
US8974573Mar 15, 2013Mar 10, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring a refrigeration-cycle system
US8977794Oct 21, 2009Mar 10, 2015Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8994539Oct 21, 2009Mar 31, 2015Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed-architecture heating, ventilation and air conditioning network
US9017461Mar 15, 2013Apr 28, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring a refrigeration-cycle system
US9021819Mar 15, 2013May 5, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring a refrigeration-cycle system
US9023136Mar 15, 2013May 5, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring a refrigeration-cycle system
US9046900Feb 14, 2013Jun 2, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring refrigeration-cycle systems
US9081394Mar 15, 2013Jul 14, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring a refrigeration-cycle system
US9086704Mar 15, 2013Jul 21, 2015Emerson Climate Technologies, Inc.Method and apparatus for monitoring a refrigeration-cycle system
US9121407Jul 1, 2013Sep 1, 2015Emerson Climate Technologies, Inc.Compressor diagnostic and protection system and method
US9140728Oct 30, 2008Sep 22, 2015Emerson Climate Technologies, Inc.Compressor sensor module
US9152155Oct 21, 2009Oct 6, 2015Lennox Industries Inc.Device abstraction system and method for a distributed-architecture heating, ventilation and air conditioning system
US9194894Feb 19, 2013Nov 24, 2015Emerson Climate Technologies, Inc.Compressor sensor module
US9261888Oct 21, 2009Feb 16, 2016Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US9268345Oct 21, 2009Feb 23, 2016Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US9285802Feb 28, 2012Mar 15, 2016Emerson Electric Co.Residential solutions HVAC monitoring and diagnosis
US9304521Oct 7, 2011Apr 5, 2016Emerson Climate Technologies, Inc.Air filter monitoring system
US9310094Feb 8, 2012Apr 12, 2016Emerson Climate Technologies, Inc.Portable method and apparatus for monitoring refrigerant-cycle systems
US9310439Sep 23, 2013Apr 12, 2016Emerson Climate Technologies, Inc.Compressor having a control and diagnostic module
US9325517Oct 21, 2009Apr 26, 2016Lennox Industries Inc.Device abstraction system and method for a distributed-architecture heating, ventilation and air conditioning system
US9377768Oct 21, 2009Jun 28, 2016Lennox Industries Inc.Memory recovery scheme and data structure in a heating, ventilation and air conditioning network
US9432208Oct 21, 2009Aug 30, 2016Lennox Industries Inc.Device abstraction system and method for a distributed architecture heating, ventilation and air conditioning system
US9480177Jun 28, 2013Oct 25, 2016Emerson Climate Technologies, Inc.Compressor protection module
US9551504Mar 13, 2014Jan 24, 2017Emerson Electric Co.HVAC system remote monitoring and diagnosis
US9574784Jun 13, 2014Feb 21, 2017Lennox Industries Inc.Method of starting a HVAC system having an auxiliary controller
US9590413Feb 9, 2015Mar 7, 2017Emerson Climate Technologies, Inc.System and method for compressor motor protection
US20080066474 *Apr 10, 2007Mar 20, 2008Michael Ramey PorterRefrigeration system energy efficiency enhancement using microsystems
US20080077260 *Apr 10, 2007Mar 27, 2008Michael Ramey PorterRefrigeration system fault detection and diagnosis using distributed microsystems
US20080216494 *Sep 6, 2007Sep 11, 2008Pham Hung MCompressor data module
USD648641Oct 21, 2009Nov 15, 2011Lennox Industries Inc.Thin cover plate for an electronic system controller
USD648642Oct 21, 2009Nov 15, 2011Lennox Industries Inc.Thin cover plate for an electronic system controller
WO2008030572A1 *Sep 7, 2007Mar 13, 2008Emerson Climate Technologies, Inc.Compressor data module
Classifications
U.S. Classification62/127, 62/230
International ClassificationF24F1/00, F24F11/00, F25B49/00
Cooperative ClassificationF25B49/005, F25B2500/06, F24F11/0086, F24F2011/0043, F24F2011/0091
European ClassificationF24F11/00R9, F25B49/00F
Legal Events
DateCodeEventDescription
Apr 26, 2007ASAssignment
Owner name: EMERSON CLIMATE TECHNOLOGIES, INC., OHIO
Free format text: CERTIFICATE OF CONVERSION, ARTICLES OF FORMATION AND ASSIGNMENT;ASSIGNOR:COPELAND CORPORATION;REEL/FRAME:019215/0273
Effective date: 20060927
Owner name: EMERSON CLIMATE TECHNOLOGIES, INC.,OHIO
Free format text: CERTIFICATE OF CONVERSION, ARTICLES OF FORMATION AND ASSIGNMENT;ASSIGNOR:COPELAND CORPORATION;REEL/FRAME:019215/0273
Effective date: 20060927